CN107097770A - A kind of passenger train air brake valve - Google Patents

Abstract

Subtract shutoff valve the invention discloses a kind of passenger train air brake valve, including service portion, work reservoir charge valve, balanced valve, balanced valve and office, the service portion includes steam supply valve, stabilizers and main piston assembly.The present invention causes pressure difference to control the action of brake valve by the change of train tube pressure, produce the functions such as inflation, braking, pressurize, alleviation, the pressure size of checking cylinder is controlled using the pressure size of chamber volume, car air brake valve is realized using two pressure indirect control modes, eliminate traditional sliding valve structure, using diaphragm plate, the plunger-type structure of only valve, structure is simpler, and operation more stablizes, reliable.

Description

A railway passenger car air brake valve

technical field

The invention mainly relates to an air brake valve for a railway passenger car.

Background technique

The railway passenger car air brake valve is the core component of the railway passenger car braking system, which controls the inflation, braking and release of the railway passenger car.

The brake valves used in passenger cars are mainly 104 type passenger car air distribution valve (hereinafter referred to as 104 valve) and F8 type passenger car air distribution valve (hereinafter referred to as F8 valve); the main control mechanism of 104 valve is a two-pressure slide valve structure; The control mechanism is a three-pressure plunger structure, which has the switchability of stage relief and one-time relief. When the conversion cover of the distribution valve is placed in the stage relief position, it can be programmed for special use. When the conversion cover of the distribution valve is placed in the first relief When in place, it can be mixed with vehicles equipped with air brakes of the second pressure mechanism.

The 104 valve is the main air distribution valve for passenger trains in my country. After more than 40 years of use and continuous improvement, it has shown the advantages of reliable function and convenient maintenance. With the improvement of the speed and safety requirements of passenger trains, the operating department reported that the 104 valve has occasional accidental emergencies, unexpected braking, poor cleanliness inside the valve, natural relief, and poor lubrication of the slide valve pair.

The F8 passenger car air brake passed the appraisal of the Ministry of Railways in 1989 and was widely used. Some problems in use: natural relief, continuous exhaust, poor relief.

Contents of the invention

The object of the present invention is to provide a plunger-type air brake valve for railway passenger cars that adopts two-pressure indirect control mode in order to solve the above-mentioned problems.

The technical solution of the present invention is achieved as follows: an air brake valve for railway passenger cars, including an action part, a working air cylinder charging valve, a balance valve, a balance valve and a partial reduction closing valve, characterized in that: the action part includes a supply The air valve, the stabilizing part and the main piston assembly, the upper chamber of the main piston assembly of the action part communicates with the train pipe through the pipeline, and the lower chamber communicates with the working air cylinder, and the pressure difference is caused by the change of the train pipe pressure To control the action of the brake valve, the upper chamber of the air supply valve communicates with the working air cylinder through the pipeline, and the lower chamber of the air supply valve communicates with the volume chamber through the pipeline, and the air supply valve communicates with the volume chamber through the pipeline. The pressure change of the air pipe controls the opening and closing of the passage between the working air cylinder and the volume chamber. The upper chamber of the air supply valve communicates with the air exhaust port. To the atmosphere, the chamber above the main piston assembly communicates with the auxiliary air cylinder through the auxiliary air cylinder charging check valve, the auxiliary air cylinder communicates with the equalizing valve through the pipeline, and the equalizing valve communicates with the brake cylinder through the pipeline The auxiliary air cylinder is used as the air source to supply air to the brake cylinder through the equalizing valve, the train pipe communicates with the chamber below the main piston assembly through the working air cylinder charging valve, and the train pipe inflates the working air cylinder. The pressure changes of the train pipe and the working air cylinder participate in the balance. When the brake needs to be in the braking position, the ejector rod of the balance valve will withstand the main piston assembly and drive the main piston assembly to move upward. The ejector rod of the main piston assembly pushes back the valve port of the stabilizing part, and the chamber above the main piston assembly communicates with the local reduction chamber and the local reduction closing valve through the valve port of the stabilizing part respectively, and the volume chamber passes through the pipeline It communicates with the balance valve, and the balance valve controls the pressure of the brake cylinder according to the pressure of the volume chamber.

In the railway passenger car air brake valve of the present invention, the chamber above the main piston assembly communicates with the local relief valve through the valve port of the stabilizing part, and the local relief valve is respectively connected with the brake cylinder and the local relief valve through pipelines. room connected.

In the air brake valve for railway passenger cars according to the present invention, when the pressure in the volume chamber reaches 50-70 kPa, the partial relief valve cuts off the passage of the pressure air in the partial relief chamber to the brake cylinder.

The invention controls the action of the brake valve through the pressure difference caused by the change of the train pipe pressure, and produces functions such as inflation, braking, pressure maintaining, and relief, and uses the pressure of the volume chamber to control the pressure of the brake cylinder, thereby realizing the air pressure of the passenger car. The brake valve adopts the two-pressure indirect control method, cancels the traditional slide valve structure, and adopts the plunger structure of diaphragm and stop valve, which has a simpler structure and more stable and reliable operation.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Marks in the figure: 1 is the action part, 2 is the charging valve of the working air cylinder, 3 is the balance valve, 4 is the balance valve, 5 is the partial reduction and closing valve, 6 is the air supply valve, 7 is the stabilization part, 8 is the main piston assembly 9 is the train pipe, 10 is the working air cylinder, 11 is the volume chamber, 12 is the air exhaust port, 13 is the auxiliary air cylinder charging check valve, 14 is the auxiliary air cylinder, 15 is the brake cylinder, 16 is the partial reduction Chamber, 17 is the local reducing valve.

detailed description

Below in conjunction with accompanying drawing, the present invention is described in detail.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, an air brake valve for a railway passenger car includes an action part 1, a working air cylinder charging valve 2, a balance valve 3, a balance valve 4 and a partial reduction closing valve 5, and the action part 1 includes an air supply valve 6. The stabilizing part 7 and the main piston assembly 8, the upper chamber of the main piston assembly 8 of the action part 1 communicates with the train pipe 9 through the pipeline, and the lower chamber communicates with the working air cylinder 10, and passes through the train pipe 9 The change of pressure causes the pressure difference to control the action of the brake valve to produce functions such as inflation, braking, pressure maintenance, and relief. The upper chamber of the air supply valve 6 communicates with the working air cylinder 10 through a pipeline. The lower chamber of the air valve 6 communicates with the volume chamber 11 through a pipeline, and the air supply valve 6 controls the opening and closing of the passage between the working air cylinder 10 and the volume chamber 11 according to the pressure change of the train pipe 9. The upper chamber of the valve 6 communicates with the air exhaust port 12. The opening and closing of the air supply valve 6 can discharge the pressure air in the volume chamber 11 to the atmosphere, and the chamber above the main piston assembly 8 is inflated by the auxiliary air cylinder. The return valve 13 communicates with the auxiliary air cylinder 14 to prevent the wind from the auxiliary air cylinder from flowing back into the train pipe, and the shrinkage controls the speed of the train pipe to inflate the auxiliary air cylinder. The auxiliary air cylinder 14 communicates with the equalizing valve 4 through a pipeline, so The balance valve 4 communicates with the brake cylinder 15 through a pipeline, the auxiliary air cylinder 14 is used as a wind source to supply air to the brake cylinder 15 through the balance valve 4, and the train pipe 9 communicates with the main piston through the working air cylinder charging valve 2. The chamber below the assembly 8 is connected, and the train pipe 9 inflates the working air cylinder 10 at a specified inflation speed, and the pressure change between the train pipe 9 and the working air cylinder 10 participates in the balance. At this time, the ejector rod of the balance valve 3 will withstand the main piston assembly 8 and drive the main piston assembly 8 to move upward, and the ejector rod of the main piston assembly 8 will push open the valve port of the stabilizing part 7, and the The chamber above the main piston assembly 8 communicates with the local reduction chamber 16 and the local reduction closing valve 5 respectively through the valve port of the stabilizing part 7. The function of the balance valve is to ensure that the brake function reaches Brake position, and ensure the performance of the brake pressure holding position, the function of the partial reduction and closing valve is to communicate the passage between the train pipe and the atmosphere at the initial stage of braking, so that the pressure of the train pipe can be decompressed at a faster speed, so that the acting part can quickly enter In the braking position, the volume chamber 11 communicates with the equalizing valve 4 through a pipeline, and the equalizing valve 4 controls the pressure of the brake cylinder 15 according to the pressure of the volume chamber 11 .

Wherein, the chamber above the main piston assembly 8 communicates with the local reduction valve 17 through the valve port of the stabilizing part 7, and the local reduction valve 17 communicates with the brake cylinder 15 and the local reduction chamber 16 respectively through pipelines. When the pressure in the volume chamber 11 reaches 50-70 kPa, the partial relief valve 17 cuts off the passage of the pressure air in the partial relief chamber 16 to the brake cylinder 15 to terminate the partial relief effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (3)

1. a kind of passenger train air brake valve, including service portion（1）, work reservoir charge valve（2）, balanced valve（3）, balanced valve （4）And office subtracts shutoff valve（5）, it is characterised in that：The service portion（1）Including steam supply valve（6）, stabilizers（7）And main work Fill in assembly（8）, the service portion（1）Main piston assembly（8）Upper chambers pass through pipeline and train pipe（9）Connection, below Chamber and work reservoir（10）Connection, passes through train pipe（9）The change of pressure causes pressure difference to control the action of brake valve, institute State steam supply valve（6）Upper chamber pass through pipeline with work reservoir（10）Connection, the steam supply valve（6）Lower chamber pass through pipe Road and chamber volume（11）Connection, the steam supply valve（6）According to train pipe（9）Pressure change, control the work reservoir（10） With chamber volume（11）The opening and closing of path, the steam supply valve（6）Upper chamber with row atmospheric air port（12）Connection, the steam supply valve （6）Opening and closing can make chamber volume（11）Pressure air arrange to air, the main piston assembly（8）Upper chambers pass through auxiliary reservoir Charging check valve（13）With auxiliary reservoir（14）Connection, the auxiliary reservoir（14）Pass through pipeline and balanced valve（4）Connection, the equilibrium Valve（4）Pass through pipeline and checking cylinder（15）Connection, the auxiliary reservoir（14）Pass through balanced valve as wind regime（4）Supply to checking cylinder （15）, the train pipe（9）Pass through the reservoir charge valve that works（2）With main piston assembly（8）Lower chamber is connected, the train pipe （9）To work reservoir（10）Inflation, the train pipe（9）With work reservoir（10）Pressure change participate in balance, work as brake When needing to be in retarder location, the balanced valve（3）Push rod by main piston assembly（8）Withstand and drive main piston assembly（8）To Upper movement, the main piston assembly（8）Push rod by stabilizers（7）Valve port top open, the main piston assembly（8）Upper chambers Pass through stabilizers（7）Valve port subtract room with office respectively（16）Drawn game subtracts shutoff valve（5）Connection, the chamber volume（11）Pass through pipeline With balanced valve（4）Connection, the balanced valve（4）According to chamber volume（11）Pressure size control checking cylinder（15）Pressure it is big It is small.

2. passenger train air brake valve according to claim 1, it is characterised in that：The main piston assembly（8）Top Chamber passes through stabilizers（7）Valve port and office subtract valve（17）Connection, the office subtracts valve（17）By pipeline respectively with checking cylinder （15）, office subtract room（16）Connection.

3. passenger train air brake valve according to claim 2, it is characterised in that：The chamber volume（11）Pressure reaches During 50~70kPa, the office subtracts valve（17）Office is subtracted into room（16）Pressure air is arranged to checking cylinder（15）Path cut-out.