Air seal type friction-free pneumatic semispherical valve and control device thereof

Abstract

The invention discloses an air seal type friction-free pneumatic semispherical valve and a control device thereof. The air seal type friction-free pneumatic semispherical valve comprises a semispherical valve body, a pneumatic driving apparatus and an automatic control apparatus; the pneumatic driving apparatus is movably connected with the semispherical valve body; the pneumatic driving apparatuscomprises an executing mechanism, a piston, a rear cover, a connecting rod, a crank, a rotary shaft, a copper sleeve, an inner hexagonal adjusting positioning shaft and a cylinder barrel; and one endof the rotary shaft is connected with the semispherical valve body. By means of the air seal type friction-free pneumatic semispherical valve and the control device thereof, the valve adopts an air seal type sealing structure and a sphere rotation and seal ring friction-free structure which are combined, a seal ring is protected against abrasion to the maximum degree, the rotation torque of an existing valve is reduced to the maximum degree, and the service life of valve sealing is improved; and through the semispherical structure, the weight is low, the material cost is reduced greatly, whole rotation is flexible, and meanwhile the effect of automatic compensation can be achieved.

Description

technical field [0001] The invention relates to the technical field of pneumatic valves, in particular to a gas-sealed, frictionless pneumatic hemispherical valve and a control device thereof. Background technique [0002] Ball valve, the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids, among which the hard-sealed V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal valve seat of surfacing welding carbide, especially suitable for fibers, tiny solid particles, etc. medium. The multi-way ball valve can not only flexibly control the confluence, diversion, and flow direction switching of the medium on the pipeline, but also close any channel and connect the other two channels. According to the driving mode, the ball valve is divided into: pneumatic ball valve, electric ball valve, manual ball valve. Half of the existing b...

AI Technical Summary

Problems solved by technology

Half of the existing ball valves use a perfect sphere as the valve core. The valve core in this state is heavy, requires a large torque and friction, not only requires a lot of materials, but also requires high requirements for the pneumatic drive device, which is This leads to an increase in its production cost, and at the same time, the stability and rotation flexibility cannot be guaranteed. At the same time, in order to ensure the sealing performance of the existing ball valve, it causes greater wear and tear. At the same time, the seal used for sealing is inconvenient to adjust, resulting in poor overall use effect. good, short lifespan

Images