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Safety valve

A safety valve and valve body technology, applied in the field of safety valves, can solve problems such as opening, exhaust valve pressure balance cannot be maintained, and safety hazards

Active Publication Date: 2015-07-08
MEISHAN CRRC BRAKE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the anti-skid device of existing railway vehicles, the exhaust valve is directly connected to the regulator through a hose, so that when the hose connected to the regulator breaks, the pressure air in the corresponding cavity in the exhaust valve will quickly leak , so that the pressure balance in the exhaust valve cannot be maintained, causing the passage from the brake cylinder in the exhaust valve to the atmosphere to be opened, so that the brake cylinder of the regulator cannot perform braking normally, causing safety hazards

Method used

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the drawings.

[0015] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0016] Such as figure 1 , 2 As shown in and 3, a safety valve includes a valve body 1, a valve cover 2, and a piston 3 and a valve stem 4 arranged in a cavity formed by the valve body 1 and the valve cover 2, and one end of the valve stem 4 is connected to the piston 3. Connected, the piston 3 separates the cavity formed by the valve body 1 and the valve cover 2 into an upper piston cavity 5 and a lower piston cavity 6. A shrinkage hole A7 is provided on the piston 3, and the valve body 1 A valve...

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Abstract

The invention discloses a safety valve which comprises a valve body, a valve deck, a piston and a valve rod. A cavity formed by the valve body and the valve deck is divided into an upper piston cavity and a lower piston cavity through the piston, a shrinkage cavity A is formed in the piston, a valve seat is arranged in the valve body, the other end of the valve rod is matched with the valve seat to divide the lower piston cavity into a cavity A communicated with a regulator and a cavity B communicated with an exhaust valve, a shrinkage cavity B is formed in the valve rod, a spring is arranged at the part, below the valve rod, in the valve body, and the aperture of the shrinkage cavity B is smaller than the inflating aperture of the exhaust valve. The safety valve is installed between the regulator of an anti-skid device and the exhaust valve, when a system is normal, if wheels slide, the regulator can function normally and play the normal anti-skid role, when a hose connected with the regulator breaks, the pressure balance of the exhaust valve can be maintained, a path between a braking cylinder and the atmosphere is maintained to be closed, and the braking cylinder controlled by the regulator can still normally execute braking.

Description

Technical field [0001] The invention belongs to the technical field of railway vehicles, and particularly relates to a safety valve installed between an anti-skid regulator and an exhaust valve. Background technique [0002] In the existing anti-skid devices of railway vehicles, the exhaust valve is directly connected to the regulator through a hose. In this way, when the hose connecting the regulator is broken, the compressed air in the corresponding cavity in the exhaust valve will quickly leak , So that the pressure balance in the exhaust valve cannot be maintained, causing the passage of the brake cylinder in the exhaust valve to the atmosphere to be opened, so that the brake cylinder of the regulator cannot perform braking normally, causing safety hazards. Summary of the invention [0003] The purpose of the present invention is to solve the above-mentioned problems and provide a safety valve that enables the brake cylinder controlled by the regulator to perform braking norma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/20
CPCB60T15/021
Inventor 田宇吕超刘保华李婧
Owner MEISHAN CRRC BRAKE SCI & TECH CO LTD