As the process of urbanization in China continues to advance, ready-mixed concrete has been rapidly developed and applied in large and medium-sized cities throughout the country, and the concrete mixing plant has also experienced rapid development. At present, there are many production enterprises of concrete mixing plants in China, and the products have become serialized, but the technical level is uneven. Only some products are close to the international advanced level, and some have exceeded the level of imported concrete mixing plants. Some of these products have a high degree of automation and production. High capacity, high weighing accuracy, low investment, good mixing quality, can realize multi-warehouse number, multi-mixture ratio, continuous production without interruption, localization degree of host machine and its main components, but China's concrete mixing station There are also disadvantages such as low overall technological content, low penetration rate, large regional differences, low level of intelligence, and low environmental performance.
Advantages of China's concrete mixing station 1. Higher reliability of concrete mixing station in China after more than 10 years of development, the development process is the introduction - digestion - part of the domestic - all domestic - improvement and improvement. It is normal for a concrete company to continuously produce 10,000 cubic meters of concrete. Its key components such as main engines, screw machines, main controls, and pneumatic components are fairly stable. For example, the mixing blades use a unique high-chromium high-manganese alloy. Materials, shaft end supports and seals use unique multiple seals or hermetic seals, which greatly increase the reliability of the host. For wear resistant steel plates such as unloading hoppers and transition buckets, which are often subjected to impact and wear, the steel plates are reinforced in the inner part; the joints of the ring type belts are vulcanized and bonded, and the service life is increased by 3 times compared with ordinary steel riveting. This is to ensure its reliability. High sexual preconditions.
High degree of automation control Since 2002, many concrete companies have begun to adopt parallel methods with two-way main engines to solve the problem of increasing the production capacity while ensuring the waiting time for a standby and reducing concrete truck. Most of its control systems are relatively advanced and stable at present, and the degree of automation is generally high, and they can all be automatically and continuously produced continuously for a long time. The operation platform and computer monitoring in the control room can visually reflect the entire production process and the conditions of each site, such as the cement storage condition of the cement silo, the aggregate storage in the aggregate storage, the transportation of aggregates and the discharge of concrete, etc. The situation can be found in the shortest possible time if there is a problem in one part, and it can be resolved in time.
All mixing stations are controlled by industrial computers, which can be controlled automatically or manually. The operation is simple and convenient. The dynamic panel displays the operation status of each component of the mixing station. It can also store various data of the mixing station, print various types of report data as required, and can store up to tens of thousands of recipes. The control room is equipped with air conditioning to ensure that the electrical components are durable, stable and reliable, and the control system basically adopts two modes. One is the dual-control mode, that is, the system is composed of two high-performance industrial computers and one is used as the master. Production system, another backup machine that serves as the management and monitoring system as the master control production machine. As the master control system, it has manual and automatic functions. The data sharing between the control engine and the management machine can be converted to the management machine when the control engine fails. Work to maximize the system's continued normal operation. Another type is composed of industrial computer plus batching control instruments, that is, the data of the batching control instrument input to the industrial computer, and the execution signal is output through the board card or the PLC programmable controller, so as to ensure the continuous and normal operation of the system. In the host discharge port, batching stations and other key components can be set surveillance cameras.
Higher production capacity The current emergence of double parallel stations and multi-parallel stations has greatly increased the production capacity of major concrete companies. For example, two 120 parallel stations can increase the annual production of concrete to 600,000 cubic meters, and three parallel stations can increase About 800,000 cubic meters, which fundamentally solves the problem of insufficient production capacity and restricts the further development of most companies.
Measurement accuracy The measurement accuracy of a high-concrete mixing plant is divided into four areas: aggregate, cement, water, and additives. The accuracy of the aggregate is generally controlled within ±2%, and the accuracy of cement is generally controlled within ±1%. The accuracy of water is generally controlled within ±1%, and the accuracy of the additive is generally controlled within ±1%. Aggregate measurement is generally carried out by using belt scales and weighing hoppers. The belt is called cumulative weighing. The weighing hopper is weighed individually or cumulatively.
The weighing of cement and powder is generally carried out using a weighing hopper. When there is a variety of powders, it is weighed or weighed individually. Water metering generally has two methods of volumetric type and weighing type. Volumetric type is divided into time measurement method, quantitative water metering method, and turbine flow metering method; weighing type is divided into self-falling drainage weighing device and pressurized water pump. Drainage weighing device and integrated weighing bucket structure; the weighing of the additive is volume type, mass type and pulse meter.
Regardless of the weighing of aggregates, powders or liquids, the weighing, control and signal conversion components are all imported components. High-precision sensors, imported microcomputer control, weighing individually or cumulatively, are fully guaranteed. Accurate and stable performance.
Investment province concrete companies have less investment in mixing plants than other pumping equipment. If investing in a 120 station in the case of better configuration will not exceed 2 million yuan, 2 120 parallel stations can also be controlled at 3.6 million.
Stirring quality: When the mixing machine is in operation, the drive mechanism drives the two agitator shafts to rotate synchronously and reversely. Each stirring shaft is respectively arranged with 4-8 agitating arms and two pairs of side agitating arms, which are equipped with stirring blades and a scraper, and the materials are put into After the mixer stirs the coarse and fine aggregates and admixtures through the stirring blades and scraper, the mixture moves radially and axially in the middle of the tank body, and convection is formed in the intersection area between the two agitating shafts to realize the material's strong Stir, so that the mixing quality is better and more uniform.
Double-shaft forced mixer has strong stirring ability, uniform mixing quality and high productivity. It has good mixing effect for dry hard, semi-rigid, plastic and various ratio concrete mixing. Lubrication system and spindle drive system are all imported from a whole set. The hydraulic door opening mechanism can adjust the discharge door opening as required. The mixing axis of the mixing machine adopts anti-blocking technology to effectively prevent the agglomeration of cement on the shaft. The shaft end seal adopts a unique multiple sealing structure, which effectively prevents the leakage of the mortar and guarantees the continuous and long-term operation of the entire stirring system. The cleaning system adopts automatic control of high-pressure water pump and manual control. Each outlet hole is located directly above the mixing spindle, which improves the efficiency of mixing, increases the amount of water mist, reduces dust pollution, and effectively removes the cement agglomeration.
High degree of localization of main engines and their main components In recent years, a number of mixing plant manufacturers in China have used the host technology of foreign countries to develop host computers of multiple brands, such as Siemens mainframes with Italian technology, Shigoma mainframes, and Germany. The host of the BHS technology, to a certain extent, solved the problem that the quality defects in the mixing console in China for many years have not been resolved. Most of the major components and components are currently used by Sino-foreign joint ventures or wholly foreign-owned manufacturing of electrical and hydraulic components, such as Toledo, Schneider, Siemens and Omron components, are relatively stable, so that the cost of domestic stations has been greatly reduced, and the quality And stability is not inferior to imported mixing stations.
Advantages of China's concrete mixing station 1. Higher reliability of concrete mixing station in China after more than 10 years of development, the development process is the introduction - digestion - part of the domestic - all domestic - improvement and improvement. It is normal for a concrete company to continuously produce 10,000 cubic meters of concrete. Its key components such as main engines, screw machines, main controls, and pneumatic components are fairly stable. For example, the mixing blades use a unique high-chromium high-manganese alloy. Materials, shaft end supports and seals use unique multiple seals or hermetic seals, which greatly increase the reliability of the host. For wear resistant steel plates such as unloading hoppers and transition buckets, which are often subjected to impact and wear, the steel plates are reinforced in the inner part; the joints of the ring type belts are vulcanized and bonded, and the service life is increased by 3 times compared with ordinary steel riveting. This is to ensure its reliability. High sexual preconditions.
High degree of automation control Since 2002, many concrete companies have begun to adopt parallel methods with two-way main engines to solve the problem of increasing the production capacity while ensuring the waiting time for a standby and reducing concrete truck. Most of its control systems are relatively advanced and stable at present, and the degree of automation is generally high, and they can all be automatically and continuously produced continuously for a long time. The operation platform and computer monitoring in the control room can visually reflect the entire production process and the conditions of each site, such as the cement storage condition of the cement silo, the aggregate storage in the aggregate storage, the transportation of aggregates and the discharge of concrete, etc. The situation can be found in the shortest possible time if there is a problem in one part, and it can be resolved in time.
All mixing stations are controlled by industrial computers, which can be controlled automatically or manually. The operation is simple and convenient. The dynamic panel displays the operation status of each component of the mixing station. It can also store various data of the mixing station, print various types of report data as required, and can store up to tens of thousands of recipes. The control room is equipped with air conditioning to ensure that the electrical components are durable, stable and reliable, and the control system basically adopts two modes. One is the dual-control mode, that is, the system is composed of two high-performance industrial computers and one is used as the master. Production system, another backup machine that serves as the management and monitoring system as the master control production machine. As the master control system, it has manual and automatic functions. The data sharing between the control engine and the management machine can be converted to the management machine when the control engine fails. Work to maximize the system's continued normal operation. Another type is composed of industrial computer plus batching control instruments, that is, the data of the batching control instrument input to the industrial computer, and the execution signal is output through the board card or the PLC programmable controller, so as to ensure the continuous and normal operation of the system. In the host discharge port, batching stations and other key components can be set surveillance cameras.
Higher production capacity The current emergence of double parallel stations and multi-parallel stations has greatly increased the production capacity of major concrete companies. For example, two 120 parallel stations can increase the annual production of concrete to 600,000 cubic meters, and three parallel stations can increase About 800,000 cubic meters, which fundamentally solves the problem of insufficient production capacity and restricts the further development of most companies.
Measurement accuracy The measurement accuracy of a high-concrete mixing plant is divided into four areas: aggregate, cement, water, and additives. The accuracy of the aggregate is generally controlled within ±2%, and the accuracy of cement is generally controlled within ±1%. The accuracy of water is generally controlled within ±1%, and the accuracy of the additive is generally controlled within ±1%. Aggregate measurement is generally carried out by using belt scales and weighing hoppers. The belt is called cumulative weighing. The weighing hopper is weighed individually or cumulatively.
The weighing of cement and powder is generally carried out using a weighing hopper. When there is a variety of powders, it is weighed or weighed individually. Water metering generally has two methods of volumetric type and weighing type. Volumetric type is divided into time measurement method, quantitative water metering method, and turbine flow metering method; weighing type is divided into self-falling drainage weighing device and pressurized water pump. Drainage weighing device and integrated weighing bucket structure; the weighing of the additive is volume type, mass type and pulse meter.
Regardless of the weighing of aggregates, powders or liquids, the weighing, control and signal conversion components are all imported components. High-precision sensors, imported microcomputer control, weighing individually or cumulatively, are fully guaranteed. Accurate and stable performance.
Investment province concrete companies have less investment in mixing plants than other pumping equipment. If investing in a 120 station in the case of better configuration will not exceed 2 million yuan, 2 120 parallel stations can also be controlled at 3.6 million.
Stirring quality: When the mixing machine is in operation, the drive mechanism drives the two agitator shafts to rotate synchronously and reversely. Each stirring shaft is respectively arranged with 4-8 agitating arms and two pairs of side agitating arms, which are equipped with stirring blades and a scraper, and the materials are put into After the mixer stirs the coarse and fine aggregates and admixtures through the stirring blades and scraper, the mixture moves radially and axially in the middle of the tank body, and convection is formed in the intersection area between the two agitating shafts to realize the material's strong Stir, so that the mixing quality is better and more uniform.
Double-shaft forced mixer has strong stirring ability, uniform mixing quality and high productivity. It has good mixing effect for dry hard, semi-rigid, plastic and various ratio concrete mixing. Lubrication system and spindle drive system are all imported from a whole set. The hydraulic door opening mechanism can adjust the discharge door opening as required. The mixing axis of the mixing machine adopts anti-blocking technology to effectively prevent the agglomeration of cement on the shaft. The shaft end seal adopts a unique multiple sealing structure, which effectively prevents the leakage of the mortar and guarantees the continuous and long-term operation of the entire stirring system. The cleaning system adopts automatic control of high-pressure water pump and manual control. Each outlet hole is located directly above the mixing spindle, which improves the efficiency of mixing, increases the amount of water mist, reduces dust pollution, and effectively removes the cement agglomeration.
High degree of localization of main engines and their main components In recent years, a number of mixing plant manufacturers in China have used the host technology of foreign countries to develop host computers of multiple brands, such as Siemens mainframes with Italian technology, Shigoma mainframes, and Germany. The host of the BHS technology, to a certain extent, solved the problem that the quality defects in the mixing console in China for many years have not been resolved. Most of the major components and components are currently used by Sino-foreign joint ventures or wholly foreign-owned manufacturing of electrical and hydraulic components, such as Toledo, Schneider, Siemens and Omron components, are relatively stable, so that the cost of domestic stations has been greatly reduced, and the quality And stability is not inferior to imported mixing stations.
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