Novel split sliding valve sleeve structure

Abstract

The invention discloses a novel split sliding valve sleeve structure comprising a reducing sleeve, a valve sleeve and a valve seat, wherein the reducing sleeve is arranged in an inner hole of a main valve body; a sliding chute matched with the valve seat is arranged in an inner hole of the reducing sleeve; the reducing sleeve and the valve seat are respectively provided with correspondingly-communicated through holes; and the valve sleeve is arranged in the reducing sleeve and is provided with a notch matched with a grinding surface of the valve seat. According to the invention, by changing the traditional sliding valve sleeve with an integrated structure into a detachable split structure and changing an inner grinding surface of the traditional sliding sleeve into an outer grinding surface, the planeness of a sealing surface of the sliding valve sleeve can be improved by conveniently adopting a novel high-precision processing and grinding process, so that the grinding of the sliding valve sleeve is changed into the modern objective scientific mechanical automatic grinding from the experiential workshop manual operation, the grinding quality can be fundamentally improved and the qualitative leap of the grinding work can be realized.

Description

technical field [0001] The invention relates to a novel split slide valve sleeve structure. Background technique [0002] Since the birth of railway air brakes (especially two-pressure control mode and direct relief brakes) at the end of the 19th century and the beginning of the 20th century, the core control components first used the pair of friction pairs of the slide valve and the slide valve seat (hereinafter referred to as spool valve pair). The internal gas circuit switching of the control valve to produce various control functions is concentrated on the slide valve pair, and each action point of the control valve is based on the friction performance of the slide valve pair. [0003] Such as figure 1 , 2 As shown in and 3, it is a structural schematic diagram of the existing 120 valve body, wherein the slide valve sleeve 11 is an integral structure arranged in the inner hole 5 of the main valve body 4, through the interference fit between the slide valve sleeve and ...

AI Technical Summary

Problems solved by technology

In the existing structure, the sliding valve sleeve is an integral structure. Due to the limitation of the structure, the inner plane cannot be ground in batches and accurately by the machine, but can only be processed by handicrafts based on experience. The grinding of the inner grinding surface 11a of the slide valve sleeve has become the most difficult process in the production and maintenance of the slide valve sleeve, so that the quality and precision of the grinding are not high, which seriously affects the use of the valve body

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