The hybrid Weighing system integrates computer technology, automatic control, communication technology and weighing technology. It has complete control functions, centralized display and operation, convenient data processing, simple installation and maintenance, and the system is easy to expand. Structurally, it has solved the problem of "concentrated danger" in the computer centralized control system, achieving "centralized management and decentralized danger". The system is stable and reliable, meeting the requirements for use in continuous production processes.

The weighing and Batching system (mixer) applies configuration software to complete data acquisition and process control. It supports multiple communication protocols and provides users with a variety of equipment support. The rich and colorful dynamic pictures and powerful system functions make it easy for you to operate. The batching system has strong scalability, is easier to integrate with other systems, and more effectively protects users' investment. Redundant stations utilize two redundant cpus, enhancing higher availability and security. They automatically switch from the running system to the other system based on the principle of "choose one of two" when a fault occurs. In this way, for a single-station system, you can provide dual power supplies or industrial Ethernet communication modules for each subsystem and combine them. The safe, reliable, advanced and practical system design selects a mature and advanced distributed computer control system. Under the premise of centralized information management and scientific operation in the production process, it disperses risks and improves the reliability of the system. Various on-site data are collected by PLC and transmitted to the central control room for centralized monitoring and management through high-speed network. The central control room host also transmits control commands to the PLC measurement and control terminal through a high-speed network to implement decentralized management of each unit.

The main unit of the automatic batching system adopts an industrial PC as the upper computer (an industrial computer that is fully compatible with ordinary computers and more suitable for harsh industrial environments) + PLC+ weighing module (or weighing signal sample) + weighing sensor + weighing actuator. It may include a metering control host (upper computer), weighing software (metering software/control software), plc weighing instrument, weighing module, hopper scale, and warehouse scale. The methods can be incremental scale and subtractive scale. And in most cases, it is controlled by a frequency converter.

This feeding system uses compressed gas as the power source as the conveying medium. Forced pneumatic conveying is adopted, relying on a sealed pressure vessel (sending tank) as the sender. Generally, the air source pressure is 0.5Mpa to 0.7Mpa, and the operating pressure is 0.3 to 0.5Mpa. The sending tank can only adopt intermittent conveying mode, and the conveying distance can reach over 1000 meters. The way materials are conveyed in pipelines at a lower speed, in a dune state, in a fluidized or agglomerated state is called positive pressure dense phase conveying. High-pressure Roots blowers can also be adopted.

According to the conveying characteristics, the system can also be divided into two types: positive pressure dense phase dynamic pressure conveying and positive pressure dense phase embolic conveying. The way materials are conveyed in pipelines at medium and low speeds in a sand dune state or in a fluidized state is called dense-phase dynamic pressure conveying. The way materials are conveyed in a pipeline at a relatively low speed in an agglomerated state is called dense-phase embolization conveying.

Basic principle

Due to the effect of pressure, the material enters the conveying pipe from the sending tank. The compressed gas forms a pulse gas flow (air knife) through the opening and closing of the solenoid valve at a certain frequency. With the pressure of the air knife being greater than that of the sending tank, the material is cut into a material plug. Relying on the static pressure difference before and after the material plug as the driving force, the material is pushed forward. After reaching the separation device for material and gas separation, the material falls into the silo, and the gas is discharged into the atmosphere. Achieve conveying.

Product features

It has a relatively low flow rate but a large conveying capacity, and has almost no impact on the quality of the material.

2. The system features high pressure and low gas consumption.

3. The control system is automated and has high requirements for various electrical components.

4. It can be fed and discharged at multiple points.

5. Due to the relatively low material conveying speed, the degree of wear on pipelines and materials is relatively low.

6. The sending tank (also known as the warehouse pump) is a pressure vessel and a mandatory signed equipment.

7. The air source is generally a screw air compressor, and the post-treatment equipment must be matched.

8. The system is reliable and requires little maintenance, but it has high demands on the quality of the operating technicians.

9. The gas conveying volume is small, and the separation of material and gas is easy to achieve

10. The working pressure is relatively high, thus enabling long-distance transportation. The use of boosters can achieve ultra-long-distance transportation.

Basic parameters

Positive pressure dense-phase dynamic pressure conveying

Air velocity: 8m/s- 15m/s

Conveying capacity: 3- 50th anniversary

Conveying distance: Up to 100-1000 meters

Air source type: Roots blower, air compressor.

2. Positive pressure dense phase embolization conveying

Air velocity: 4m/s- 12m/s

Conveying capacity: 2- 20/h

Conveying distance: Up to 50- 200 meters

Air source type: High-pressure air compressor.