rotary valve

What is the rotary valve?

• A rotary valve is a mechanical device that controls fluid regulation by rotating parts such as a rotating baffle to change the valve from the open position to the closed position. ‌‌
• The working principle of the rotary valve is based on the rotor with several blades rotating in the cylindrical casing. The material falls from the upper hopper, fills the space between the blades, and is discharged as the blades rotate.
• This kind of equipment usually consists of a rotor, a casing, a seal, a motor, a reducer, etc., and can achieve uniform and continuous material transportation.
• Rotary valves are widely used in industry, especially in pneumatic conveying systems. They can evenly and continuously supply materials to the feeding pipe. They are suitable for positive or negative pressure pneumatic conveying systems, pulse dust removal equipment, precision feeding and other occasions. .
• The rotary valve has the characteristics of compact structure, beautiful appearance, good air locking performance, stable operation, uniform blanking, light weight and energy saving. It can play the role of feeding and locking the air flow, effectively preventing the reverse flow of the air flow and ensuring the safety of the system. Stable air pressure and normal discharge of materials.

Rotary valve working principle

• ‌The working principle of the rotary valve‌ is mainly based on its design structure and working mechanism. The rotary valves usually consists of a rotor blade. When the material in the upper bin falls by its own weight and fills the space of the rotor blade, as the blade rotates, the material is taken to the lower outlet and discharged, thereby achieving continuous feeding and unloading. function of the material. This design is particularly important in pneumatic conveying systems because it can not only supply materials, but also lock the air flow. Through the low-speed rotation of the rotor and the extremely small gap between the rotor and the inner cavity of the housing, it effectively prevents the reverse flow of the air flow, thereby maintaining The air pressure in the system is stable and the materials are discharged normally.
• The self-cleaning rotary valve is improved on the basis of ordinary rotary valves. By adding a cleaning blade (scraper), it can automatically remove the residual material on the rotor while dosing the material quantitatively. It is especially suitable for sticky and easy-to-stick valves. block of special materials. Its working principle involves the coordinated work of two upper and lower rotors: the upper rotor is equipped with blades for quantitative feeding, while the lower rotor is equipped with a cleaning blade, which uses the difference in rotational speed of the upper and lower rotors to achieve self-cleaning while quantitatively feeding. .
• The working principle of the eccentric rotary valve is to use an eccentrically rotating sector-shaped ball valve to open and close the valve through the engagement and separation of the eccentric ball crown and the valve seat. When opening, the ball core separates from the valve seat; when closing, the ball core gradually contacts the valve seat, exerting a compressing force on the valve seat.
• The working principle of the rotary valves involves many aspects such as material filling, rotary conveying, air flow control, etc. Different types of rotary valves (such as self-cleaning rotary valves, eccentric rotary valves) have different implementation methods, but they are all designed to improve the quality of materials. Conveying efficiency and system stability.

Rotary valve diagram

What is the function of a rotary control valve?

• The main functions of the rotary valve include unloading and air locking. ‌‌
• The rotary valve plays an important role in the negative pressure pneumatic conveying system, and its main functions can be summarized as two points: unloading and air locking. The discharge performance is directly related to the air locking performance of the rotary valve, which is particularly important in negative pressure pneumatic conveying systems.
• The rotary valve is usually installed below the cyclone separator, dust collector or cyclone dust collector and is used as an unloader to ensure the smooth operation of the system and the effective transportation of materials. In addition, the rotary valve also has functions such as cut-off, diversion, pressure stabilization, and flow diversion, which further expands its diversity and flexibility in industrial applications.