Plunger valve for high-frequency switch working condition

Abstract

The invention belongs to the technical field of fluid control valves, and relates to a plunger valve for a high-frequency switch working condition, which comprises a valve seat, the valve seat is hermetically connected with a valve body, the valve body is provided with a valve body side pipe runner, a bushing is arranged in an inner cavity of the valve body, a bushing window is arranged on the side part of the bushing, and the bushing window is communicated with the valve body side pipe runner; a sealing ring, a guide sleeve, a first packing set, a packing spacer bush, a second packing set and a packing gland are sequentially arranged at the position, corresponding to the upper end of the lining, of an inner cavity of the valve body, the lower portion of the packing gland is arranged in an inner hole of the valve body, the upper end of the packing gland is axially limited through a pressing plate assembly, and a plunger is arranged in an inner hole of the lining and an inner hole of the valve seat. An inner hole of the packing gland is in sealing fit with the plunger, and the packing gland is in sealing fit with the valve body. The plunger valve has the advantages of being not prone to material blocking, convenient to disassemble and assemble, rapid, good in high-frequency switching action reliability, high in plunger and valve seat sealing grade, capable of meeting the low-dissipation emission requirement of filler and the like.

Description

technical field [0001] The invention belongs to the technical field of fluid control valves, and relates to a plunger valve for high-frequency switching conditions. Background technique [0002] Polypropylene (referred to as PP) is a colorless, translucent thermoplastic lightweight general-purpose plastic with excellent performance. It has good chemical resistance, heat resistance, electrical insulation, high strength toughness and high wear resistance, and is widely used In machinery, automobile, electronics, textile, packaging, food, pharmaceutical and other industries. Polypropylene is a polymer produced by addition polymerization of propylene. Its production methods mainly include slurry method, solution method, bulk method, gas phase method, etc., among which bulk method and gas phase method are dominant. [0003] Plunger valves are widely used in polypropylene production equipment. They are mainly used for program control of the bottom or top inlet and outlet of vario...

AI Technical Summary

Problems solved by technology

Because the medium is easy to block, easy to erode, flammable, explosive, toxic, etc., and the valve switching time needs to be less than 3 seconds, the action is frequent, and the sealing level requires level VI, so the operating conditions of the valve are extremely strict

Traditional plunger valves generally have disadvantages such as easy material blockage, inconvenient maintenance, fast and high-frequency switching action, poor reliability, poor sealing between the plunger and valve seat, and easy leakage of packing, which seriously affects the safety, continuous and stable operation of the device.

Images