Air supply adjustment valve for railway freight cars

Abstract

The invention provides an air supply regulating valve for railway freight cars, belonging to the technical field of railway freight cars, comprising: the two ends of the valve body are respectively provided with air inlet holes and air outlet holes, and the middle part of the valve body is provided with upper chambers sequentially from top to bottom and the lower chamber, a valve seat is set between the upper chamber and the lower chamber, and the middle part of the valve seat is provided with a first ventilation hole that first shrinks and then gradually expands from top to bottom; the air filling valve part is arranged in the upper chamber, and the air filling valve part It includes a piston and a piston cylinder that are slidably arranged in the upper chamber, and the lower part of the piston is provided with a first sandwich valve; the check valve part is arranged in the lower chamber, and the check valve part includes a second sandwich valve that is slidably arranged in the lower chamber. The sandwich valve and the first sandwich valve can block the first ventilation hole from the lower side and the upper side, respectively. The passage diameter of the first ventilation hole is used to control the air filling speed of the air supply adjusting valve, which solves the problem that the air filling speed of the original air supply adjusting valve is difficult to control, and improves the operational reliability and safety of the air supply adjusting valve.

Description

technical field [0001] The invention belongs to the technical field of railway freight cars, and more particularly relates to an air supply adjustment valve for railway freight cars. Background technique [0002] Railway hopper cars account for a relatively low proportion of the number of railway transportation equipment, but they have irreplaceable advantages and functions in transporting specific goods. It is mainly divided into coal hopper trucks and ballast hopper trucks. The loading and unloading methods are top loading and unloading. With the increasing cost of labor, users put forward higher demands on the use of hopper trucks, requiring efficient loading and unloading efficiency. , with fewer people and safer operation. Therefore, at present, most hopper trucks have realized the wind-controlled opening and closing of the bottom door, which improves the loading and unloading efficiency of hopper trucks and reduces the labor cost of enterprises. [0003] The air supp...

AI Technical Summary

Problems solved by technology

The pressure regulating valve part of the existing air supply regulating valve is a spring box and the valve body that press the copper diaphragm pressure ring and copper diaphragm to form a sealing structure, and the maintenance cost is low. However, with the vibration of the air filling and vehicle operation, the copper diaphragm The sheet pressure ring and the copper diaphragm will be deformed, resulting in leakage of the pressure regulating valve, and the stroke of the copper diaphragm is used to control the air filling speed. There is a problem that the stroke of the copper diaphragm is too small, which will easily lead to the difficulty of controlling the air filling speed, reducing the Operation reliability and safety of air supply adjustment valve

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