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Advantages and status quo of equipment in my country’s concrete mixing plant industry

Advantages of my country’s concrete mixing plant

1. Highly reliable concrete mixing plant equipment has been developed in my country for more than ten years. Its development process is to introduce-digest-partly made-all made-to improve. It is normal for a general concrete company to continuously produce 10,000 cubic meters of concrete. The performance of its key components such as the main engine, screw machine, main control and pneumatic components has been quite stable. For example, the mixing blade adopts unique high chromium and high manganese alloys. The material, shaft end support and sealing form adopt unique multiple sealing or airtight, which greatly improves the reliability of the host. Wear-resistant steel plates are used to strengthen the parts that are often subject to impact and wear, such as discharge hoppers, transition hoppers, etc.; the ring belt joints are vulcanized and bonded, and the service life is 3 times longer than that of ordinary steel riveting, which ensures its reliability A prerequisite for high sex.

2. High degree of automation control. After 2002, many concrete companies began to adopt the parallel connection of two main engines, which solved the problem of increasing production capacity while ensuring a spare and reducing the waiting time of concrete trucks. Most of its control systems are relatively advanced and stable at present, and the degree of automation is generally high, and they can be fully automated for long-term uninterrupted continuous production. The operating platform and computer monitoring in the control room can vividly reflect the entire production process and the situation of each part, such as the cement storage situation in the cement silo, the aggregate storage in the aggregate silo, the transportation of the aggregate and the discharge of the concrete, etc. If a problem occurs in a certain part, it can be found in the shortest time and solved in time.

3. All mixing plants are controlled by industrial computers, which can be controlled automatically or manually, and the operation is simple and convenient. The dynamic panel displays the operating conditions of the various components of the mixing plant, and can store various data of the mixing plant, print various report materials as required, and store more than tens of thousands of recipes. The control room is equipped with air-conditioning to ensure the durability of electrical components, stable performance and continuous reliability. The control system basically adopts two methods, one is dual-computer dual-control mode, that is, the system is composed of two high-performance industrial computers, one as the main control Production system, another backup machine as the management and monitoring system and also the main control production machine, as the main control machine system has manual and automatic functions, data sharing between the control machine and the management machine, the control machine can be switched to the management machine when it fails Work to maximize the continuous and normal operation of the system. The other is composed of an industrial computer and a batching control instrument, that is, the batching control instrument data is input to the industrial computer, and the execution signal is output through the board card or PLC programmable controller to ensure the continuous normal operation of the system. Monitoring cameras can be set on key components such as the host discharge port and batching station.

4. Higher production capacity. The emergence of dual parallel stations and multiple parallel stations has greatly improved the production capacity of major concrete companies. For example, two 120 parallel stations can increase the annual output of concrete to 600,000 cubic meters, and 3 parallel stations It can be increased to about 800,000 cubic meters, which fundamentally solves the problem of insufficient production capacity that restricts the further development of most companies.

5. High measurement accuracy The measurement accuracy of concrete mixing plant is divided into 4 aspects, namely aggregate, cement, water and admixture. The accuracy of aggregate is generally controlled within, and the accuracy of cement is generally controlled within  , The accuracy of water is generally controlled within, and the accuracy of admixtures is generally controlled within . Aggregate measurement is generally carried out by using belt scales and weighing hoppers. The belt is called cumulative weighing, and the weighing hopper is individual weighing or cumulative weighing. The weighing of cement and powder is generally carried out with a weighing hopper. When there are multiple powders, it is used to weigh cumulatively or separately. Water measurement generally has two methods: volumetric and weighing methods. Volumetric methods are divided into time measurement methods, quantitative water meter measurement methods, and turbine flow meter measurement methods; weighing methods include self-falling drainage weighing devices and pressurized water pumps. Drainage weighing device and integral weighing barrel structure; the weighing of admixtures includes volumetric, mass, and pulse metering methods.

6. Whether it is the weighing of aggregates, powders or liquids, the weighing, control and signal conversion components are all imported components, high-precision sensors, imported microcomputer control, and each scale is weighed individually or cumulatively. Ensure accurate measurement and stable working performance.

Investment Provincial Concrete Company’s investment in mixing plant is less than other pumping equipment. For example, the investment in 1 120 stations with better configuration will not exceed 2 million yuan, and two 120 parallel stations can also be controlled at 3.6 million yuan.

The mixing quality is good. The transmission mechanism of the mixing main engine drives the two mixing shafts to rotate in the opposite direction. Each mixing shaft is equipped with 4 to 8 mixing arms and two pairs of side mixing arms, which are equipped with mixing blades and scrapers. After the mixer, the thick and fine aggregates, admixtures, etc. are stirred by the mixing blades and scrapers to make the mixed materials move radially and axially in the middle of the tank, forming convection in the cross area between the two mixing shafts to achieve strong material Stir, so as to make the mixing quality better and more uniform.

The twin-shaft concrete mixer has strong mixing capacity, uniform mixing quality and high productivity. It has a good mixing effect for dry hard, semi-dry hard, plastic and various proportions of concrete. The lubrication system and the main shaft drive system are all imported with original packaging, and the hydraulic door opening mechanism can adjust the opening of the discharge door as required. The mixing shaft of the main mixer adopts anti-adhesion technology to effectively prevent cement from agglomerating on the shaft. The shaft end seal adopts a unique multiple sealing structure to effectively prevent mortar leakage and ensure the continuous and long-term operation of the entire mixing system. The cleaning system adopts high-pressure water pump automatic control and manual control. Each water outlet is located directly above the mixing spindle to improve mixing efficiency, increase water mist, reduce dust pollution, and effectively remove cement agglomeration.

The host and its main components have a high degree of localization. In recent years, many mixing plant manufacturers in my country have used the technology of absorbing foreign host computers to develop multiple brands of host computers, such as Siemens hosts with Italian technology, Shicoma hosts, and Germany The main engine of BHS technology, to a certain extent, solves the situation that the quality defects of the current mixing main engine in our country have not been solved for many years. In terms of main components, currently most of the electrical and hydraulic components manufactured by Sino-foreign joint ventures or wholly foreign-owned enterprises, such as Toledo, Schneider, Siemens and Omron, are relatively stable, so that the cost of domestic stations has been greatly reduced, and the quality And the stability is no less than that of imported mixing plants.

Post time: Dec-01-2020
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