RELIEF REGULATING VALVE FOR RAILWAY VEHICLE

WIPO Patent Application WO/2018/018744

A1

Provided is a relief regulating valve for a railway vehicle, comprising a valve body (1). An air inlet (13) and an air outlet (14) are arranged on the valve body (1). An ejector rod (2), a valve seat (3) and a sandwich valve (4) are arranged in the valve body (1). A lower portion of the ejector rod (2) is located in the valve seat (3), and an upper portion of the ejector rod (2) is connected to an ejector rod driving mechanism. An ejector rod spring (5) is sheathed on the ejector rod (2). The sandwich valve (4) is provided at a valve port (6) of the valve seat (3). A sandwich valve spring (7) is provided under the sandwich valve (4). In a fast relief position, the sandwich valve (4) communicates a chamber A (8) with a chamber B (11) in a small-flux mode. By providing the relief regulating valve at a relief passage of a vehicle brake system, the calibre of the relief passage of the brake system can be changed by means of the operation of the ejector rod driving mechanism, such that the vehicle brake system has different relief time periods, the vehicle has the function of having different relief time periods under different working conditions, and thus corresponding requirements for the vehicle brake system are met.

JPS52150817	FLUID VALVE
WO/2021/224048	PRESSURE-REGULATING VALVE

ZHANG JIE (CN)
XIE LEI (CN)
LV CHAO (CN)
SHEN YANFEI (CN)

PCT/CN2016/100736

February 01, 2018

September 29, 2016

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MEISHAN CRRC BRAKE SCIENCE & TECH CO LTD (CN)

F16K11/04; F16K27/02; F16K31/52

CN205841852U	2016-12-28
CN102431541A	2012-05-02
CN102923118A	2013-02-13
CN201970991U	2011-09-14
US4917148A	1990-04-17
US20070215219A1	2007-09-20

CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)

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