Operating valve and railway vehicle braking system
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A technology for acting valves and valve stems, applied in brakes, brake components, railway vehicles, etc., can solve problems such as damage, poor pressure holding effect, and reduced control accuracy of acting valves, and achieve rapid control, good sealing effect of the valve port, The effect of reasonable structural design
Pending Publication Date: 2017-06-23
MEISHAN CRRC BRAKE SCI & TECH CO LTD
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[0003] In the braking system of high-speed EMUs, urban rail vehicles and locomotives, a pilot control pressure is usually generated by a solenoid valve or a corresponding mechanical mechanism, and the relay valve is controlled to amplify the air flow to quickly form the required control braking pressure, and then Generate braking force, and the traditional relay valve has been unable to meet the rail vehicle braking system
The existing action valve is realized by the cooperation of a flat rubber valve and two valve ports. The flatness of the rubber valve and the machining accuracy of related parts are relatively high. When the pressure is maintained, air is easy to leak, and the pressure maintaining effect is poor.
In addition, the rubber diaphragm of the existing action valve has large twists and turns, which may easily cause friction between the rubber and the inner cavity parts and cause premature damage, reducing the control accuracy of the action valve
Method used
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no. 1 example
[0033] Please refer to figure 1 , this embodiment provides an action valve 100 , including a valve body 10 , a valve stem assembly 11 , a return assembly 12 and a control assembly 13 .
[0034] Such as figure 2 As shown, the valve body 10 is provided with at least three connected chambers, and each chamber is provided with a channel communicating with the outside, and the three chambers are respectively the main air chamber 101, the output chamber 102 and the pre-control chamber 103, The main air chamber 101 communicates with the output chamber 102 through the first valve port 104 , and the output chamber 102 communicates with the pre-control chamber 103 through the second valve port 105 .
[0035]As an optional solution of this embodiment, the valve body 10 is provided with three chambers, namely, the main air chamber 101 , the output chamber 102 and the pre-control chamber 103 . Such as figure 2 As shown, the total air chamber 101 is provided with a total air channel 10...
no. 2 example
[0052] This embodiment provides a rail vehicle brake system, including a brake assembly and the action valve 100 provided in the first embodiment, and the action valve 100 is used to control the brake assembly.
[0053] In this implementation, the action valve 100 can realize the function of increasing, decreasing and maintaining the output pressure, and the action valve 100 acts on the brake assembly, which can precisely control the brake assembly, thereby realizing precise braking of the rail vehicle and ensuring the safety of the rail vehicle run.
[0054]To sum up, the present invention provides an action valve 100 and a rail vehicle braking system. The action valve 100 can control the opening or closing of the valve port of the action valve 100 according to the change of the pre-control pressure, so as to realize the rise, fall and fall of the output pressure. Pressure maintaining function, the structure design of the action valve 100 is reasonable, the sealing effect of ...
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Abstract
The invention relates to an operating valve and a railway vehicle braking system, and belongs to the technical field of railway vehicle braking. The operating valve comprises a valve body, a valve rod assembly, a restoration assembly and a control assembly. The valve body is provided with a main air cavity, an output cavity and a precontrol cavity, and the restoration assembly is used for driving the valve rod assembly to close a first valve port; the control assembly is located in the main air cavity and communicated with the external air, the control assembly can drive a valve rod to move in the length direction of the valve rod, and the control assembly and the valve rod are used in cooperation for achieving communication or disconnection between the main air cavity and the output cavity, and between the output cavity and the external air. The operating valve is reasonable in structural design, the valve port sealing effect is good, a planar diaphragm plate is durable, pressure precontrol is precise, the service life of the product is long, and the demand of a user is met. According to the railway vehicle braking system with the operating valve, a braking assembly can be precisely controlled, so that precise braking of a railway vehicle is achieved, and safe running of the railway vehicle is guaranteed.
Description
technical field [0001] The invention relates to the technical field of rail vehicle braking, in particular to an action valve and a rail vehicle braking system. Background technique [0002] In order to accurately control the compressed air pressure and increase the filling and exhausting rate, the rail vehicle braking system generally uses a relay valve (also called an action valve, referred to as an action valve in this paper) to amplify the air flow and control the pressure value of the compressed air. The relay valve in the traditional railway locomotive braking system accepts the manipulation of the automatic brake valve and acts according to the pressure change of the equalizing air cylinder to directly control the air filling or exhausting of the train pipe. The braking system using this relay valve is Traditional train tube decompression braking method. [0003] In the braking system of high-speed EMUs, urban rail vehicles and locomotives, a pilot control pressure i...
Claims
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