A pneumatic high pressure differential regulating valve

Abstract

The invention discloses a pneumatic high pressure difference adjusting valve. The pneumatic high pressure difference adjusting valve comprises a valve body, a valve rod, a valve core and a valve seat, wherein the side surface of the valve body is provided with an inlet passage, the bottom surface of the valve body is provided with an outlet passage, the valve seat is fixedly installed in the outlet passage, a middle cavity connected with the inlet passage and the outlet passage is also arranged in the valve body, a through hole which is coaxial with the outlet passage of the valve body is formed in the top of the middle cavity, an annular supporting seat axially extending downwards is installed in the through hole, the lower end of the valve rod penetrates into the annular supporting seat and is connected with the valve core matched with the valve seat in a sealing manner, an annular flow cavity communicated with the inlet passage and the outlet passage is formed between the lower end surface of the annular supporting seat and the upper end surface of the valve seat on the valve body, a groove is formed in the upper end surface of the valve core, and the lower end part of the valve rod is inserted into the groove and connected and matched with the groove in a threading manner. The pneumatic high pressure difference adjusting valve is more reasonable in structure and safer and more reliable to use.

Description

technical field [0001] The invention relates to a valve, in particular to a pneumatic high pressure difference regulating valve. Background technique [0002] In the existing technology, the high pressure differential control valve, especially the high pressure differential control valve containing solid particles in the medium, is often prone to resonance, flash evaporation, strong erosion and other undesirable phenomena during use, and the service life of the valve core is extremely short. Even the valve body has the potential safety hazard of being eroded by the medium at a high speed. In order to solve the above defects, the patent document with the publication number CN101592227 discloses a black and gray water wear-resistant regulating valve, although it effectively solves the problems of valve resonance, flash evaporation and valve stem scour, but because the The outlet channel needs to pass through the resonant sleeve. Correspondingly, the resonant sleeve is provide...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, the high pressure differential control valve, especially the high pressure differential control valve containing solid particles in the medium, is often prone to resonance, flash evaporation, strong erosion and other undesirable phenomena during use, and the service life of the valve core is extremely short. Even the valve body has the potential safety hazard of being eroded by the medium at a high speed

In order to solve the above defects, the patent document with the publication number CN101592227 discloses a black and gray water wear-resistant regulating valve. The outlet channel needs to pass through the resonant sleeve. Correspondingly, the resonant sleeve is provided with many orifices for the medium to flow through. However, due to the small diameter of these orifices, in the actual application process, the above-mentioned orifices are easy to be blocked by the medium. The solid particles cause blockage, which leads to the failure of the valve to flow normally

In addition, in the above-mentioned patent, the assembly of the valve core and the valve stem is achieved by fixing the fastener through the valve core and the valve stem from bottom to top, which leads to the exposed fastener below the valve core, which is extremely easy Damaged by the erosion of the over-current high-pressure medium, which in turn causes the valve core to fall off the valve stem, making the valve completely useless and easily causing major production accidents

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