Pay Attention to the Problem of Concrete Mixing Station in Working

Concrete mixing station system is complex, each component system has its own need to achieve the function of the aggregate aggregate, cement powder, water, external additives in accordance with a certain proportion of ratio, the final realization of finished concrete production. Can be said that all aspects can not go wrong, and today we will talk about mixing plant operating ingredients should pay attention to the problem encountered such a similar problem should pay more attention to timely prevention.

      At present, concrete mixing stations are generally used in automatic control system, set in advance a variety of materials hungry mix ratio, automatic measurement, the error is small. But also, after all, only the machine can not blindly rely on, but also the need for timely observation and comparison of the operator. In the concrete mixing plant production, we should pay attention to observe the measurement error, the overshoot adjustment, as well as the residual feeding process to grasp, to ensure the accuracy of metrological requirements.

    When the concrete mixing station production of concrete mixed with admixture, the stirring time should be appropriately extended. Dry mixing, the fly ash concrete mixing time than ordinary concrete extension of 10-30 seconds, the other admixture of concrete extension of 30-60 seconds.

    In addition, the concrete mixing plant operators on the mixing station control function of the various components of the concept must be clear, the correct order of operation and operating procedures to be proficient. The only way to deal with emergencies in the correct time to avoid operational errors resulting in equipment damage and material losses.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, Concrete mixing plant, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!
（www.zzxfjxwm.com）

Repair And Troubleshooting of Concrete Mixing Plant

 Concrete mixing plant failure problems can be checked in accordance with the components step by step, can also be classified according to the nature of the fault, according to the nature of the failure we make analysis and propose solutions for reference.
 
1, the occurrence of high frequency fault
 
  Frequent high frequency, need to check the work of the regular inspection of such failures generally do not cause serious consequences can be adjusted at work at any time to solve. Such as conveyor belt deviation adjustment method should be analyzed and resolved from the principle, focusing on understanding the principle of three running three does not run (do not run before the run, do not run loose run, run high does not run low).
 
2, the occurrence of high frequency fault
 
  The occurrence frequency is lower than the previous species, but the maintenance of complex, usually caused by system failure or damage to parts, such as conveyor roller does not turn, the mixer spindle and the discharge port slurry leakage; such failures should be blender spindle seal Principle.
3, sudden failure
 
The frequency is very low, but improper handling or processing is not timely result in the consequences of National Chiao Tung University, can not be ignored, what will focus on description.
 
3.1 Aggregate silo doors can not be closed（www.zzxfjxwm.com）
 
Symptom: Aggregate said weighing value exceeds the value of a lot of formula, and the screen shows the silo has been cutting, even weighing the door open a long time there is still weighing value.
 
  Cause: (1) cylinder failure or damage; (2) control electromagnetic valve failure or damage; (3) a large aggregate or impurities will be stuck door; (4) control system failure.
 Solution: found the fault immediately shut down, manual operation will be stirring the concrete mixing after the release. Find the fault location and the cause, according to the cause of the fault or replace the damaged components, troubleshooting and then clean up the belt and overflow of aggregate.
 
3.2 aggregate measurement Doumen can not be closed
 
   Reason: (1) cylinder failure or damage (2) control solenoid valve failure or damage; (3) control system failure
 
Symptom: Aggregate scale began to measure after the screen shows a very low value, and in this value does not increase shaking, aggregate display in the next material.
 
Approach: with the aggregate warehouse door can not be closed the same.
 
3.3 Mixer failure
 
Causes and symptoms: (1) mixing blade fracture, spindle bearing damage and other parts of the spindle accidental damage, will be accompanied by the production of large abnormal sound, the host current will exceed the normal value.
(2) control component damage or control system failure, usually manifested as normal operation. (3) The discharge door can not be opened
 
Disposal: find the fault immediately shut down, manual operation mixer hydraulic door handle, the mixer all the materials drained, clean up the belt and the overflow of the aggregate, to find the fault location and the reasons for troubleshooting or replacement of damaged components.
  Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, Concrete mixing plant, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Fault Diagnosis of Concrete Mixing Plant

01 observation method of inquiry
 
In the maintenance of equipment before, according to the service life of the equipment and related models for preliminary analysis, asked the user to do the repair and inspection, and then make in-depth understanding and careful observation of the phenomenon of failure, and then make judgments, pay attention to Easy to wear wearing parts, the use of reliability.(www.zzxfjxwm.com)
 
02 Auditory method
 
When the device is running, will issue a regular and noisy sound, if the device fails, it will produce abnormal sound. In the maintenance, equipment can be run in different conditions, and then auscultation of equipment failure, for example, for crankshaft and linkage, you can use a long rod auscultation auscultation abnormal; the role of the gap at the card slot role and reaction force , There is irregular noise.
 
03 Touch method
 
Maintenance personnel can use the feel to the equipment failure to feel. Such as: the motor overheating; hand touch the pump outlet hose, you can feel the pressure of the water flow passive, so that the pump can work; check the actual tightness of the belt, the friction surface of the specific wear and tear; Sex is not very good axis components, running there will be obvious vibration, or tremor and other phenomena, to prove whether the normal work of machinery and equipment.
 
04 olfactory method
 
If the concrete mixing Plant machinery and equipment work overload, there will be odor, so for the work can be carried out by virtue of smell. For example, a mechanical overload may occur on the operating equipment. If the temperature rises, odor may be generated. If the non-metallic material emits a scorched odor, the wire may be damaged.
 
05 replacement method
 
 
The so-called replacement method is to use a qualified assembly or parts, will appear to replace damaged parts, wear parts and easy to wear parts for periodic inspection and replacement. For some vulnerable, but not maintenance.
Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, Concrete mixing plant, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Concrete Mixer Installation Method

1, the mixer should be set in a flat position, with square wooden pad from the front and rear axles, the tire placed overhead, so as not to move when moving.
2, the mixer should be implemented two leakage protection, power supply connected to work before, you must carefully check the empty car try to pass that can be used. Test run should check the speed of mixing tube is appropriate, under normal circumstances, the empty car speed proportion of vehicles (after loading) slightly faster 2 to 3 turn, such as more difference should be adjusted wheel and transmission wheel ratio.
3, the rotation direction of the mixing tube should be consistent with the direction of the arrow, if not true, should correct the motor wiring.
4, check the transmission clutch and brake is flexible and reliable, whether the damage to steel wire rope, track pulley is good, around the barrier-free and lubrication of various parts of the situation.
5, boot, always pay attention to the operation of various parts of the mixer is normal. Shutdown, often check whether the mixer blade bending, whether the screw hit or loose.
6, when the concrete mixing is completed or is expected to stop 1h or more, in addition to the remaining material out of the net, the application of stones and water into the shaker, the boot rotation, the stick on the barrel of the mortar rinse off all discharged. There shall be no water in the cylinder to prevent the barrel and the blade from rusting. At the same time should also be cleaned outside the mixing tube fouling, so that machinery to keep clean and intact.
7, after get off work and shut down when not in use, should be cut off power, and lock the switch box to ensure safety
 
Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, Concrete mixing plant, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Concrete mixing station in the winter construction need attention

Winter cold weather is the concrete engineering quality accident-prone season, due to low temperature in winter, the temperature difference between day and night, concrete often appears retardation or swelling phenomenon, affecting the normal operation of the project. Because the cement itself is easy to solidify the characteristics of concrete mixing plant is ready to use at any time cleaning, if you want to complete the scheduled production unit per unit time, the cleaning equipment must be very standardized, otherwise not only affect the production, and equipment Itself may also cause some damage, especially in low temperature conditions, many parts of the equipment are prone to freezing, cleaning becomes more difficult. In order to achieve the desired production effect, to avoid the above phenomenon.

1, the equipment temperature control

        Many mixing stations to save costs, equipment and facilities is relatively simple, after entering the winter construction, equipment can not run, not only a lot of waste of manpower, material and financial resources, but also delay time, supply does not affect the company's reputation.In order to ensure the normal operation of the equipment, the normal production of concrete, the silo, the admixture tank and the mixer should be closed and the heating point (stove and electric heating) should be set up Heating.Conditional should adopt the boiler heating, heating pipes should be run through the aggregate warehouse under the material mouth, admixture shed, pool, mixer shed and operating room, not only save time and effort, but also to better ensure that the machine out of the concrete temperature and workperformance.Do a good job of heating the host station heating work, check the heating insulation line, promptly remove the fault and hidden dangers, to ensure the normal operation of the winter in the host system.

2, the material temperature control

        Storage, distribution, antifreeze preparation work of winter materials in the application of various raw materials and equipment of winter facilities, and require procurement work in place in time; responsible for doing insulation work of additive storage.Cement should be preferred Portland cement, ordinary portland cement and early strength cement to improve the early strength of concrete and reduce the frequency of occurrence of frost damage.Sand, stone should give priority to the use of inventory sand, such as the winter into the new sand, sand should be strictly required to enter the water content.Mixing water that is drinking water, winter construction should be hot water mixing, water temperature control at 60 ℃, but not higher tha 80 ℃. 2, the material temperature control

        Storage, distribution, antifreeze preparation work of winter materials in the application of various raw materials and equipment of winter facilities, and require procurement work in place in time; responsible for doing insulation work of additive storage.Cement should be preferred Portland cement, ordinary portland cement and early strength cement to improve the early strength of concrete and reduce the frequency of occurrence of frost damage.Sand, stone should give priority to the use of inventory sand, such as the winter into the new sand, sand should be strictly required to enter the water content.Mixing water that is drinking water, winter construction should be hot water mixing, water temperature control at 60 ℃, but not higher tha 80 ℃.

3, other considerations（www.zzxfjxwm.com）

        Laboratory do a good job in the selection of winter admixture, retest and supporting the experimental work, do a good job during winter high-grade concrete technical reserves; antifreeze selection must be able to meet the sudden cooling and may be the lowest temperature conditions.Strengthen the management during the winter brush brush Taiwan, Taiwan should take measures to keep the car, the pool of the pool in the production process to ensure that the technology department to ensure that the water temperature requirements, and timely cleaning brush car separated after the gravel, To prevent frost.

        Concrete mixing plant in winter construction, in the relevant operation must be based on safety, by the professional staff related operations.In order to avoid the concrete construction in the winter to leave hidden dangers, to ensure project quality.

 Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, Concrete mixing plant, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Precautions for Start - up of Concrete Mixer

A description of the start mode

Start the concrete mixer using star delta conversion start mode, that is, star start, triangular run. As the mixer main motor power, start at the beginning, the stator coil for the star connection, this can reduce the starting current. To be started after a period of time, the motor speed is approaching the normal speed, then the starter stator coil will be changed to triangular connection, start indicator light, the motor to normal operation.

Second, the note

1. Do not start with load

Start with the load refers to the concrete mixer within the case of material to start. Because the start-up current with a load is very large in a period of time, easy to burn the air switch, contactor, reducing motor life, the mixer material in the case of the correct approach is:

① start the air compressor, the host door open, so that part of the material leak down;

② If the material is not a lot of concrete mixer, you can jog the host, so that the material released until the machine is finished or little complete re-start the material;

③ If the concrete mixer a lot of material, you need to manually clean up part of the above methods described above.

2. Emergency stop is prohibited

Stirring the mixer in the case of material is prohibited to stop the host, because the host to prohibit start with a load. Unless in a particularly urgent situation can stop the heavy truck is working in the mixer.

3. Use the "Emergency Stop" button with caution

The EMERGENCY STOP button is a red mushroom-shaped button located at the top left of the operator panel. When an emergency, no time to deal with the dangerous situation, you can manually shoot the emergency stop button, this button will stop except for bells and all the motor and the implementation of devices, including the mixer. When the danger is removed, the "Emergency Stop" button can be rotated to release it.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixingstation, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Daily management of storage silo in concrete mixing plant

Concrete mixing station storage silo is placed raw materials, the daily management of the standard or not related to the storage of raw materials of good quality and bad, so the mixing station staff to do the daily management of storage hopper.

1. Stones in the silo of the mixing station should be piled up in different areas to prevent the mixing ratio of materials is not allowed; different specifications of sand and gravel should be stacked warehouse, and logo, indicating the name of the raw materials, varieties, specifications, Purchase date. Warehouse management personnel to the aggregate number of silt silos, draw the entire yard area distribution map, respectively, notify the laboratory, the main control room, forklift feeding personnel, and with the above personnel to determine the ingredients on the warehouse, said the number, and the Material storage.

2. Equipped with loading trucks and the gravel were stacked neatly; site to be hardened to facilitate the loading of trucks and prevent dirt and other debris into the material.

3. To strengthen the cement, fly ash, ultra-fine powder and other powder materials management. Each silo shall be marked with the name, origin, variety and specification of the raw materials stored in it. At each silo's entrance, there shall be a mark identical with the silo, indicating the variety, specification, place of origin, Quantity, etc .; each silo imports should be locked by the person responsible for the feed management, powder material storage must be received by the staff, the supply side personnel to check, to confirm the signature to open the silo to prevent the feed The process of error, resulting in quality accidents.

4. Concrete mixing station storage silo admixture management. Bulk powder admixture according to the cement and other powder materials management methods; powder bagging additives in the warehouse to be placed neatly with signs that its name, variety, size, origin, purchase date; liquid admixture according to different Manufacturers, different species were stored, clearly identified.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Concrete mixing plant how to manage

 Orderly operation of concrete mixing plant must have quality assurance, safety, environmental protection, equipment management and other rules and regulations. And the rules and regulations must be sound, the quality of the emergence of the problem must be implemented to the people responsible for the relevant persons to have a clear penalty regulations.
 
    Concrete mixing station to establish the entry of raw materials account, check the account and so on. There should be production mixing records, including pouring unit engineering specific parts of the serial number, concrete label, production time, production is normal, can be traced back in the event of problems. Concrete outbound to have a transport order, single-marked number, station time, the concrete label, the use of parts, such as slump.
 
    Concrete mixing station management personnel should develop a sound mixing station equipment contingency plans to ensure that the supply of concrete is not due to unexpected events and interruption. According to the calculation of winter and summer heat, to develop the appropriate temperature control measures to ensure that the concrete machine, into the mold temperature within the scope of the standard.
 
    In addition, the concrete mixing station must be clearly marked signs and material identification, identification card content to be detailed, fill in the specification.
Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Check the work of concrete mixer before use

1, check the gear box and lubrication part of the lubrication (grease) is sufficient.

2, check the power supply voltage, rated voltage 380V, pressure drop not less than 10%, but not more than 5%, otherwise it will affect the normal operation of the machine.

3, check the electrical and electrical components of the wiring is solid, and wire the motor ground to ensure safety, and then turn on the power.

4, connected to water, check the water pump, throttle valve and water pipe reliability.

5, Check the various parts of the link bolts are solid, especially the moving parts of the connection, if loose should be tightened.

6, check the wire rope is neatly arranged in the reel, if loose should be re-wrapped.

7, check the mixing tube, the hopper and track rack whether the foreign body accumulation, if the deposit should be promptly cleaned.

8, check whether the lifting hopper flexible, brake, trip switch action is sensitive, accurate and safe and reliable.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Detailed construction of concrete mixing station

1. Clear the table

After selecting the site, with the excavator to remove surface debris and sludge, and transported to the designated site stacking.

2. Site excavation

Before the excavation of the site, the slope top cut ditch is made, and the seepage prevention work is made according to the soil condition. Site excavation must be top-down excavation, shall not dig, over-excavation and under-excavation, excavation to the top of the site should pay attention to reserve the settlement height, when encountered stone, the use of broken hammer construction. Excavation to the design elevation, the rolling compaction formation, less than the required capacity of the use of stone-for-fill.

3. Site hardening

First grade: 1m stone + 0.3m water stable layer + 0.2mC25 concrete;

Second, three: 0.3m water stability layer +0.2 mC25 concrete.

4. Mixing station, silo base

The size of the pile cap is 5 × 5 × 1m. Four piles with diameters of 1.2m are installed under each pile cap. The pile is embedded in the weathered rock layer not less than 4m. The pile is made of C30 concrete. .

5. silos

It is divided into 6 silos, two silos, four stone silos, and the partition wall of the distribution silo with "37" wall masonry height of not less than 1.8m, and with cement mortar To avoid stagnant water, a variety of silos area clear, set the material signage, size 40 * 750px, indicating the name of the material, origin, location, Specifications, units of measurement, quality and so on. Install water pipes on the side of the silo to rinse the aggregate before it becomes contaminated.

6.Fences

According to the actual situation of the site, surrounded by brick walls closed, with 24 walls, high 2m, every 6m spacing masonry a brick column, the top of the brick pillar with a cap. In the import and export set up guard room, and safety and quality of the slogan, and plug in the banners. Construction of the venue signs.

7.Drainage

Mixing station site in the formation site and hardened site, the overall control to set drainage on both sides, set -3% of the longitudinal slope, surrounded by 40 × 40 drainage ditch set to ensure that drainage within the smooth; six silos in the hardened field When doing a single 5% of the drainage slope, so that the silo of the water straight through the site longitudinal discharge into the drainage ditch; mixing station host drainage sedimentation tank must be set to clean the mixer after the waste water discharged into the drainage ditch. 60 × 40 drainage ditch is set outside the site.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Metering System of Concrete Mixing Plant

In the concrete mixing station, if the concrete mixer is the "heart" of the mixing station, then the metering system is the "soul" of the concrete mixing plant. Because the metering system directly affects the performance and quality of concrete.

Concrete mixing station metering system is generally reflected in the water, cement, external additives and aggregate on the measurement. The accuracy and stability of the metering system determines the quality of concrete production. Static accuracy can not meet the requirements, the key lies in the accuracy of dynamic measurement of the gap and the computer to capture the data.

In the concrete mixing plant production process, in strict accordance with the ratio of production, there is no written test laboratory personnel instructions, any person is not allowed to increase or decrease raw materials, admixtures and water consumption. Mixing time as the concrete state, without the consent of the test personnel shall not increase or decrease. Production, should closely observe the measurement is accurate, more than the required error should be adjusted in time gap. All dosing should be in the minimum range at no load. Metering system, other anomalies must be promptly reported to deal with.

In addition, the cement, additives, water error can not exceed ± 1%, found that cement, admixture quality is not enough, it should be timely to find the screw conveyor is blocked, and promptly excluded, aggregate error can not exceed ± 2%, when the error exceeds Should be promptly find out the reasons and manual compensation and records.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Reasonable Selection of Concrete Mixing Plant

1. Overall selection principle
   
   (1) production scale
   
       According to the size of the production scale to determine the capacity of concrete mixing plant. The annual output of 200,000 m3, the annual output of 200,000 m3 the following, concrete mixing equipment productivity is generally not less than 90m3 / h; annual output of 200,000 to 300,000 m3, concrete mixing equipment productivity is generally 120m3 / h; annual output of 300,000 m3 or more, concrete mixing equipment productivity Is 150m3 / h or 200m3 / h.
   
   (2) construction site
   
       According to the size of the construction site, you can choose concrete mixing plant or concrete mixing plant. The production capacity of the mixer is higher than that of the mixing plant. The overall shape is neat and beautiful. The material yard covers an area of ​​small. The production environment is good, but the manufacturing and installation cycle is long and the one-time investment is high. Selection of concrete mixing station, aggregate to be upgraded twice, flexible layout, manufacturing, installation cycle is short, one-time investment costs are low, but the yard covers an area of ​​large, poor production environment.
   
   (3) the equipment
   
       According to the conditions of equipment to select the concrete mixer specifications and working size. Mixing truck loading capacity should be matched with the material out of the mixer capacity, improper matching will affect the work efficiency. Loader loading capacity should be with the concrete mixing station to match the feeding station height.
   
   (4) management functions
   
       If the use of intensive network management, concrete mixing equipment should be considered the network management functions, to avoid future upgrades difficult.
   
   (5) equipment technical performance
   
       Mainly from the advanced equipment, reliability, excellent and versatile several considerations. Equipment should have a working principle of advanced, high degree of automation, management, powerful and environmentally friendly performance characteristics. Equipment should be configured excellent, reliable control, applicability, and maintainability. In addition, we must consider the high precision, good mixing quality, high production efficiency, low energy consumption, the use of standard parts, good interchangeability.
   
   (6) supplier reputation
   
       Including whether the installation is rigorous; technical guidance and training is in place; after-sales service is timely; spare parts supply is sufficient.
   
   (7) performance and low cost
   
       It is not advisable to pursue the technical performance of the equipment comprehensively, it will increase the unnecessary investment, but it is not advisable to pursue the low investment to reduce the technical performance of the equipment and bring the increase of the cost. The current domestic market, the overall performance of imported equipment is higher, but the price is more expensive. Domestic equipment in several well-known brands, although the overall performance can not be compared with imported equipment, but the key parts of the configuration is also commonly used imported components, the main performance is not much worse than the imported equipment, the price is much lower. More reasonable approach is to choose the appropriate cost performance.
   
   2. Selection of key components
   
   (1) Mixers for commercial concrete mixing plants
   
       Forced Mixer Good mixing quality, overload capacity, discharge without segregation, high production efficiency, can adapt to a variety of properties of concrete mixing, the current commercial concrete mixing equipment commonly used forced mixer. But its structure is more complex, the use of higher cost. Forced mixer is divided into two horizontal axes, single horizontal shaft, single vertical shaft and planetary form. The double horizontal shaft mixer has the advantages of good stirring performance, high production efficiency, good adaptability, outstanding structural features, good reliability, Commercial concrete production; single horizontal shaft mixer and single vertical shaft mixer because of its structural characteristics and adaptability in the commercial concrete mixing equipment has been less and less: the current application of planetary mixer is not common, more common in imported equipment.
   
   (2) commercial concrete mixing equipment, electronic control system
   
       At present, the domestic concrete mixing station electronic control system in a variety of forms, mainly in the following three control methods based.
   
       A, distributed type microcomputer control: This kind of control form in the early mixing station design widely applies. The core of the control system for the programmable controller, a computer only as a management report printing, the computer's function and role is not very obvious. With the wide application of commercial concrete, the concrete mixing station functional requirements more and more complex, this form of control applications is very difficult.
   
       B, centralized computer control: This form of control computer control and management functions in a single computer, the task is relatively heavy, and the production process of statistical information on the report can not be synchronized, can not always statistical data, measurement by human factors Too much interference. Such as: the preparation of measurement and control procedures, signal amplifiers and A / D board accuracy, will affect the measurement accuracy.
   
       C, centralized dual microcomputer control: This form is to solve the measurement of human factors interference. The use of a dedicated control of the ingredients of the instrument, and the production control and management functions in the two sub-computer, do not interfere with, production control and reporting statistics simultaneously, and management computer can also be used as a production backup machine, with a higher level The computer's network interface.
   
   3. Selection of other devices
   
   (1) Aggregate batching system
   
       As the silo feeding by the auxiliary equipment and the impact of the venue, the bunker volume should be larger.
   
       For the mixing station capacity of a single silo is generally greater than 20m3, if the use of belt conveyor or concrete warehouse can also be larger in order to reduce the stock yard covers an area. For a single hopper building volume is generally greater than 50m3. Concrete mixing station is generally composed of ingredients, its structure in two forms, all-steel structure ingredients on the ground ingredients, easy maintenance, easy drainage, but the feeding difficulties, the use of loader or belt machine feeding; Of the silo for the concrete structure, to warehouse ingredients, feeding convenience, easy to heat, but the maintenance difficulties, can be used loaders, bulldozers or dump truck directly on the material.
   
   (2) aggregate lifting system
   
       The belt conveyor and the hopper are generally used. The belt conveyor has high production efficiency, reliable performance, easy to be closed, not easily affected by climate, and low maintenance cost, but occupies a large area. Hoisting hopper is generally only used for mixing stations, compact structure, small footprint, but high maintenance costs, poor reliability, is currently in the large concrete mixing plant has been rarely used. There are also pattern belt and groove belt conveyor, the lifting angle can be greatly improved, the vertical belt groove can be improved, but because of its reliability and back to the material problem is not resolved, generally do not use.
   
   (3) Mix the main building
   
       Generally closed, equipped with centralized dust removal device, the cold region should also consider the requirements of winter construction cold, so insulation jacket. Open mixing station and simple mixing station, due to poor environmental performance, the current new commercial concrete mixing equipment has been rarely seen in some areas has been banned.
   
   (4) metering system
   
       At present using the weight measurement, divided into cumulative measurement and independent measurement of two forms. Accumulation measurement structure is simple, easy to maintain, feeding height is low, but can not control the measurement accuracy alone. Independent measurement of individual control measurement accuracy, structure is more complex, feeding a high degree of increase, the cost has increased.
   
   (5) powder storage and transportation devices
   
       Powder storage tank number and size should be configured according to need, generally determined by the type and supply of materials, powder cans should be equipped with material level controller. Generally, there are two kinds of powder conveying devices: pneumatic conveying structure is simple, feeding uniform, but long-distance transportation, air pressure is not easy to control; screw conveying conveying distance is long, easy to overall arrangement, reliable, the vast majority of mixing stations or stirring Building are using screw conveyor.
   
   (6) matching pieces
   
       Selection of components often determines the reliability of concrete mixing equipment. General accessories should be selected high reliability of the well-known brands, especially the main parts. For domestic equipment, electronic components, sensors, cement disc valve, and even the reducer mixer, lubricating components imported components, more reliable.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Four Principles of Emergency Rescue for Concrete Mixing Plant

1, the unified command system linkage principle

The handling of sudden crisis, the company's emergency command center (or authorized departments) unified command of the relevant departments and teams within the company, unified coordination of the relevant external units or related personnel, make full use of existing resources, the existing Command agencies, personnel, equipment, materials, information, work methods to ensure the effective control of emergencies and rapid disposal.

2, the principle of persistent and unremitting system linkage

  The handling of sudden crisis, the company's emergency command center (or authorized departments) unified command of the relevant departments and teams within the company, unified coordination of the relevant external units or related personnel, make full use of existing resources, the existing Command agencies, personnel, equipment, materials, information, work methods to ensure the effective control of emergencies and rapid disposal.

3, rapid response to coordinate the principles of settlement

 Departments and teams should establish corresponding departments and teams of early warning and emergency response plans and mechanisms to deal with emergencies to ensure that the material and manpower to prepare in case of crisis, to ensure that the discovery, reporting, command, disposal and other aspects of the close Convergence, timely response.

4, after the sudden crisis on-site temporary disposal of the principle

 In order to ensure effective control of the spread of emergencies on site, the highest (or the most direct) leadership on the jobsite can take immediate action to avoid or reduce losses without the company's Emergency Leadership Group directive.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Common Faults in Concrete Mixing Plant

1, cement scales are not allowed to weigh

The failure of the performance of the scale after the calibration can show the correct value, the figures are not zero after unloading, clear and then load the weight of digital changes, but check the sensor resistance in the normal range, and the instrument no problem.

Analysis of the reasons may be: transport with a fixed scale frame angle iron is not removed; pressure head and pressure plate at the card; scale body and the outside world interfere with each other; 3 sensor models do not match;

If the pressure head or pressure plate issuance, should be promptly dealt with, so smooth and no resistance; if the scale body and the outside world interfere with the operation of the concrete mixing station, if the scale is not removed, , Should be promptly isolated; if the three sensor models do not match, the sensor should be replaced by the same model; if the material partial load, should be adjusted.

2, when the hopper does not have the material hopper gate to open and close the difficulty

The failure of the slow performance of the cylinder action, but check the mechanical part of the unloading door without friction, stuck phenomenon, and the solenoid valve, the cylinder is no leakage phenomenon.

Analysis of the reasons may be: poor air, such as gas at the Sanlian the gas-water separator filter too dirty, resulting in poor airway, so that gas flow per unit of time reduced, resulting in slow cylinder activity; muffler dirty, Cylinder action rod chamber and rodless cavity pressure difference becomes smaller, resulting in slow cylinder action.

Handling concrete mixing station failure method is: If the gas path is not smooth, it is timely to clean or replace the filter; if the muffler too dirty, it is timely cleaning muffler.

3, the discharge port is not expected

The failure in the contactor pull, the motor clockwise rotation, the mother screw conveyor discharge port is not expected, a little longer time the air switch will trip; the air switch will start after closing the motor tripping, observation powder No solidification phenomenon.

Analysis of possible reasons: the mother machine for the reverse; air switch damage; mother motor wiring may have a poor contact.

If the air switch is damaged, it should be replaced; if the mother machine motor wiring has a bad contact, should be checked and dealt with. If the machine is not connected to the motor, the motor should be connected to the motor.

4, stirring shaft "boring car"

The performance of the failure of the mixing host in the mixing mortar, the mixing shaft rotation difficult, or even stop.

The mixing blade or the side of the blade and the inner wall of the tank larger gap, a foreign body into the intervening between the card; voltage is too low; mixing parameters of the mixing of the two parts of the material; Setting error.

Handling concrete mixing station failure method is: If the serious overload, material hoop axis, should adjust the stirring capacity, timely cleaning of the solidified mortar; if the human error caused by the second feeding, the excess material should be removed according to the process operation; The blade and the liner should be adjusted so that the gap is not greater than 5mm, and promptly clean up the foreign body; if the voltage is too low, to the operator to re-scale; if the mixing blades or side vane and the tank wall between the foreign body stuck, Re-check the line voltage; if the parameter is set incorrectly, should be carefully checked the appropriate batching data and timely amendments.

5, the host discharge gate can not be opened

The failure of the performance of the mixing station when the automatic work, the host discharge gate does not open, stirring when the discharge indicator does not shine.

Analysis of the reasons may be: discharge doors and sealing plate between the foreign body or the accumulation of material; gas system pressure is insufficient, the cylinder leakage or damage to the oil mist; solenoid valve and the wiring between the relay off, virtual or relay damage; Solenoid valve coil burning or stuck card; time relay damage, resulting in no normal PLC input signal.

Handling concrete mixing station failure method is: If the discharge door and seal plate between the foreign body or accumulate material, should clean up the foreign body, the accumulation of materials and flushing discharge gate; if the gas system pressure, the cylinder leakage or damage to the oil mist , Should check the oil mist, fittings, cylinder and other parts are damaged; if the solenoid valve and the relay wiring between the loss, virtual connection or relay damage should check the relay contact output and wiring, if necessary, replacement; if the solenoid valve coil burn Damage or spool stuck, should replace the solenoid valve; if the time relay damage, it should be replaced.

6, conveyor belt deviation

The failure of the performance of three kinds of conditions: First, the conveyor belt in the case of no-load and load to the same side of the deviation, the conveyor belt centerline sideways deviation, the conveyor belt less side of the material bias; Right deviation and no fixed direction; Third, the conveyor belt conveyor belt in the central deviation.

Uneven foundation, flat roller adhesive material, uneven around the groove roller and the main and passive roller unbalanced adjustment will cause the conveyor belt deviation. If the conveyor belt in the case of no-load and load to the same side of the deviation, indicating that the conveyor belt on both sides of the tightness is not the same or rack rugged. At this point, you should first leveling the base of the rack, remove the adhesive on the flat roller, adjust the tensioning screw or weight. If the conveyor belt left and right deviation without a fixed direction, then the conveyor belt relaxation, should adjust the tensioning mechanism. If the conveyor belt in the middle of the conveyor deviation can be adjusted by adjusting the position of the roller group to correct, as shown in Figure 1.

Adjustment method: If the conveyor belt to one side, the side of the side of the roller conveyor belt to move forward direction, the other side of the roller group can also be moved back (or the other side of the roller bracket appropriate height) . The return roller group is the same as the load roller group adjustment method. For long conveyor systems, it is very effective to adjust the idlers.

Adjustment to the drum adjustment is an important part of conveyor belt deviation adjustment, the drum installation location must be perpendicular to the conveyor conveying the direction of the center line, or inevitable deviation. As shown in Figure 2, if the conveyor belt to its right deviation, it should be the right side of the bearing seat forward (or the left bearing seat back); If the conveyor belt to the left side of the drum deviation, should Move the bearing on the left side forward (or the right bearing seat rearward).

If the conveyor belt relative to the driven roller deviation, adjust the method and active drum just the opposite.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Management of Concrete Mixing Plant

1, mechanical and electrical charge should be opened every day before the guidance, inspection, supervision, the driver of the equipment "cross operation." In particular, pay attention to equipment belt correction, measuring the pressure sensor clean.

2, in case of continuous casting large volume of concrete components required for watering. To the equipment for special process control, development of appropriate equipment emergency measures.

(1) prone to failure of the site to focus on maintenance, and to ensure that the appropriate parts reserves;

(2) contact with the power supply department to provide a reliable power guarantee;

(3) to maintain a good state of standby generators;

(4) good maintenance, ready for concrete transport vehicles (to do a little surplus). The device ready message can only be submitted to the dispatcher when the device is ready.

3, the mixing station should be equipped with two hydraulic pipes for concrete transport vehicles in the event of failure, the use of other power to the concrete tank unloading. Appropriate spare picks, timely removal of concrete mixing tank solidified concrete tank. Equipment maintenance, adjustment, maintenance, clean-up, you must cut off the total power switch, and hang the "maintenance, non-closing" warning signs.

4, concrete mixing station electric control equipment, high technical content, should be equipped with an experienced electrician, is responsible for the daily maintenance of electrical equipment.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

The Price of Concrete Mixing Plant

The price of concrete mixing plant is the most concerned about the user, the decision of the key factors of the price of concrete mixing plant depends on the specific needs of customers.

Generally large concrete production lines, such as an annual output of 100 million square and above the concrete production line is the use of multiple sets of large commercial concrete mixing station combination, only the concrete mixing station equipment investment will be several million or more, site construction and a variety of budget add up May require tens of millions or even hundreds of millions of investment, large-scale commercial concrete concrete station is mainly used for business mix or national water conservancy, highways, high-rise building construction and so on.

Different types of concrete mixing plant price, power, and equipment are not the same, the general user to buy small and medium-sized commercial concrete mixing plant, such equipment for rural construction or paving bridges. Small and medium-sized production lines, with an annual output of 100 million square, or even 50 million below the mixing station investment, equipment investment in general in the millions or hundreds of thousands of small can.

Different consumers can choose according to their own capital budget and production scale equipment model. Small and medium-sized commercial concrete mixing plant can be considered when not considering the need for high configuration requirements for stable production efficiency and longer service life. Efficient, durable, long life to ensure the user's profit maximization. Small and medium-sized commercial concrete mixing plant is relatively well maintained, because it is relatively small equipment, ancillary equipment is not so much, just spend a small amount of manpower and time will be able to guarantee the normal operation of concrete mixing plant. The large-scale concrete mixing plant prices are relatively high, large output, high efficiency and high maintenance costs, suitable for large-scale and generous amount of concrete production and demand.

Concrete mixing station is a complete set of equipment, including: concrete mixing host, concrete batching machine, mixing station control system, cement silo, screw conveyor, weighing system, the composition of the main station structure, can achieve fully automated production of concrete.

Concrete mixing plant manufacturers offer different concrete mixing plant is due to the needs of different regions of different concrete mixing plant for different customers in different regions of independent research and development needs of the factory standard mixing equipment. Various manufacturers of the standard is more different, the price is not the same. This is due to different manufacturers of technology investment, equipment selection, equipment life, equipment production of concrete mixing station caused by different prices. Now the main concrete mixing plant concrete mixing station, engineering concrete mixing plant, simple concrete mixing station.

Commercial concrete mixing plant is suitable for large-scale commercial concrete production enterprises, engineering concrete mixing station for highway, airplane runway, railway, high-speed rail and various engineering projects, simple mixing station for small and medium-sized projects and rural markets, mobile mixing station for Short construction period, the project is small, long project line. One of the urban development and transformation of concrete mixing station to use more goods, the new rural construction projects to use concrete mixing stations and simple concrete mixing stations are mostly.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Solution to Problems in Concrete Mixing Plant

The new concrete mixing plant to buy which side of the problem prone? Mixing station just bought when the unskilled operation prone to problems, just buy the mixing station may appear five problems: wear speed, poor lubrication, resulting in loosening, the occurrence of leakage, operating errors and more. Here are a few aspects of this in detail:

1. Wear speed

Commercial concrete mixing plant due to the new machine parts processing, assembly and adjustment and other factors, the friction surface roughness, with the surface contact area is small, the surface of the pressure state is not uniform. The process of running the machine, parts of the surface of the convex part of the friction fit each other, grinding down the metal debris, but also as abrasives, continued participation in friction, more accelerated parts with the surface wear. Therefore, the run-in period easily caused by parts (especially with the surface) wear, wear speed. At this time, if the overload operation, it may lead to the destruction of parts, the occurrence of early failure. Such as: mixing station host leaves;

2. Lubrication is not good

As the new assembly of commercial concrete mixing station components with a small gap, and due to assembly and other reasons, it is difficult to ensure uniform with the gap, lubricating oil (grease) is not easy to form a uniform friction surface of the oil film to prohibit wear. Thereby reducing the lubrication efficiency, resulting in abnormal early wear and tear parts. Serious will cause precision with the friction surface scratches or occlusion phenomenon, leading to the occurrence of failure.

3. Loose

In the early stage of application, due to the impact of vibration, alternating load, as well as heat, deformation and other factors, coupled with excessive wear and tear, and so on.However, there are some problems in the production of concrete mixing plant, Reason, easy to make the original fastening parts loosening.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!

Solid Waste Cleaning of Concrete Mixing Plant

Concrete mixingplant in the work, will produce some of the slag and dust production waste, the waste after a period of time, will form a curing. Resulting in more difficult to clean up the phenomenon. If these wastes are not treated, not only the surrounding environment will be affected. The value of the re-use of these wastes will be wasted. The best way is to collect them for secondary use and processing.

Concrete mixing plant site, under normal circumstances, will set up a special waste pool, used to store the weekdays in the production of waste and other debris. Regular cleaning of the pond, the pool and the bottom of the dregs of all reuse, this will be able to use the second waste, and save production costs. Again the waste should be based on the degree of use can be sub-heap aside, for some no reusable value to be stored separately, can not directly efflux.

Concrete mixing station dust produced in the production are more difficult to collect, but also the most serious damage to the surrounding, this type of dust required to use special dust collection equipment to recover after the return section to re-use . Many times the use of resources not only can reduce costs, but also can reduce the damage to the surrounding, more conducive to strengthening the enterprise behind the type of halo, to develop an excellent reputation in the industry.

The secondary utilization of the production waste of the concrete mixing plant not only reduces the environmental pollution degree of the production waste, but also saves the production cost for the concrete mixing plant. To achieve a win-win situation between the environment and the harmonious existence of green production. To create a new trend of environmental protection in the construction industry.

Zhengzhou Xinfeng Machinery Co., Ltd. Main concrete mixer, concrete mixing station, stabilized soil mixing station, concrete batching machine, concrete conveying equipment, please call to discuss!