SU1409982A1 - Pneumatic brake system pressure regulator - Google Patents

Abstract

The invention relates to the field of automatic control and can be used in transport engineering. The purpose of the invention is to expand the control range and increase the accuracy and reliability of the pressure regulator for an air brake system. The regulator includes a housing 1, a main diaphragm 2 loaded with a main compression spring 3, a discharge valve 4 with a piston 5 sensing element, an atmospheric and a main control: valves 6 and 7, a check valve B, seats 9-12 of these valves , input A, output B, intermediate C cavity, cavity D of the control of the main diaphragm and cavity D of the piston control of the unloading valve. At the same time, the dampers of the atmospheric and main control valves are made on opposite sides of the rigid center of the main diaphragm. bc (L

Description

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In case 1, an additional diaphragm 14 loaded with an additional compression spring 13 is installed, on the rigid center of which the valve of the additional control valve 15 is made, and an piston 5 is connected to a spring loaded damper valve 4. The diaphragm 2 forms an additional cavity E with the housing, which is communicated with the atmosphere and through the atmospheric valve 6 - with the cavity D, which communicates through the additional control valve 15 with the cavity G of the control of the additional diaphragm 14. The cavity D is communicated by the throttle channel 16 with a cavity J and through the main control valve 7 with an output cavity B. A reverse valve 8 connects cavity B with a cavity B. The cavity D of the piston control of the unloading valve is made in the form of a T-shaped pipe 17, in the lower part of which there is a piston 5, and on the opposite ends of its upper part are the seats 9 and 18 of the valves 6 and 15, with the end

the pipe 17 on the side of the saddle 9 of the atmospheric valve is equipped with adjusting nuts 19 of the main compression spring 3, and the preload of the spring 13 is adjusted by a screw 20. The damper of the unloading valve 4 is loaded by a spring 21, the preload of which is adjusted by a screw 22. The regulator is connected by the inlet cavity A to the compressor 1 of 23 , and the output cavity B - to the receiver 24 air brake system. The cavity A is communicated through filter 25 with cavity B. The regulator maintains in the receiver 24 a working pressure of compressed air in a range whose lower limit corresponds to the pressure of the open main control valve, and the upper sum of the pressure of opening the main control valve, additional control valve and discharge valve valve. Adjusting the valves to the required opening pressures is done with the help of nuts 19 and screws 20 and 22. 1 ° C f-ly, 1 ill. .

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This invention relates to automatic regulation and can be used in transport engineering.

The purpose of the invention is to expand the adjustment range and increase the accuracy and reliability of the pressure regulator for an air brake system.

The figure shows schematically a pressure regulator for an air brake system.

The regulator includes a housing 1, a main diaphragm 2 loaded with a main spring 3 of compression, a discharge valve 4 with a sensitive element in the form of a piston 5, an atmospheric 6 and a main 7 control valves, a reverse valve 8, seats 9-12 of these valves, input A, output B, intermediate cavity C, cavity D controlling the main diaphragm and cavity D controlling the piston of the unloading valve. At the same time, the dampers of the atmospheric and main control valves are made on opposite sides of the rigid center.

main diaphragm. In case 1, an additional diaphragm 14, loaded with an additional spring 13, is installed, on the rigid center of which an additional control valve 15 is dampened, and a spring-loaded unloading valve 4 is connected to the piston 5. 1 Diaphragm 2 forms an additional cavity E with the case, which is connected with the atmosphere, and through the atmospheric valve 6 - with the cavity D, which communicates through the additional control valve 15 with the cavity W control the additional diaphragm 14. The cavity G communicates the throttle H: IM channel 1 6 with a cavity W, and through the main control valve 7 - with an output cavity B, a check valve 8 connects cavity B with a cavity B. The cavity D of the piston control of the unloading valve is made in the form of a T-shaped pipe 17, in the lower part of which there is a piston 5, and on the opposite ends of its upper part are seats 9 and 18 of valves 6 and 15, with the end of pipe 17 on the side of the seat 9 of the atmospheric valve equipped with adjusting nuts 19 of the main compression spring 3, and the compression of the spring 13 is adjusted by a screw 20. The discharge valve 4 valve heat A spring 21, the compression of which is regulated by a screw 22. The regulator is connected by input A to the compressor 23, and the output cavity B to the receiver 24 of the pneumatic brake system. The cavity A is communicated through the filter 25 with the cavity B.

The regulator maintains in the receiver 24 a compressed air pressure in the range, the lower limit of which corresponds to the opening pressure of the main control valve 7, and the upper limit to the sum of the opening pressures of the main 7 and additional 15 control valves and discharge valve 4. The operating pressure range is adjusted using nuts 19 and screws 20 and 22.

The regulator works as follows.

When the compressor 23 is on, compressed air enters the inlet cavity A and through the filter 25, the intermediate cavity B and the check valve 8 into the output cavity of the Biv receiver 24. At the same time, valve 7 is closed and valve 6 is open and communicates cavity D to the atmosphere. Valves 4 and 15 are closed. When the opening pressure of valve 7 (lower limit of the operating pressure range) in diaphragm B and the receiver is reached, diaphragm 2 moves to the left by opening valve 7 and closing valve 6. Air from cavity G passes through throttle channel 16 into cavity J. When pressure is reached in this cavity open the valve 15, the diaphragm 14 moves to the left, together the cavity W through the valve 15

with cavity D, when pressure is reached in opening the discharge valve 4, the piston 5 moves downwards, thereby connecting the inlet cavity A through valve 4 with the atmosphere

The pressure in the inlet cavity decreases sharply, and together with the compressed air from the cavity A, the condensate accumulated in it is removed. The check valve closes, separating the inlet and outlet cavities. Compressor unloading occurs until the pressure in receiver 24 decreases due to vehicle braking or leaks to the closing pressure of valve 7, i.e. up to a predetermined minimum level of operating pressure at which diaphragm 2 moves to the right by closing valve 7 and opening atmospheric valve 6. Compressed air from the cavities D, E and Z abruptly is released into the atmosphere, while additional valve 15 and discharge valve 4 are also closed. The compressed air, pressing the check valve 8, again begins to flow into the receiver 24. The cycle of operation of the regulator is repeated.

F o rm ula invention

1. A pressure regulator for an air brake system, comprising a housing with an inlet cavity connected through a filter and a check valve to an outlet cavity, installed in the housing a main diaphragm loaded with a main compression spring,

35, the main control valve, the unloading valve with a sensitive element in the form of a piston connected to a spring-loaded damper connected to the saddle of the unloading valve, the output of which is connected to the atmosphere, and the atmospheric valve, as well as the control cavities of the main diaphragm and the piston of the unloading valve, t is characterized by the fact that

45 with the aim of expanding the range of regulation, increasing the accuracy and reliability of the regulator, it is equipped with an additional control valve with a sensitive element in the form of an additional diaphragm loaded with an additional compression spring, and the valve of the additional control valve associated with its seat is mounted on a rigid center auxiliary diaphragm, and the dampers of the atmospheric and main control valves associated with their seats, are made on opposite sides of the rigid center of the main diaphragms .

5. 1

forming an additional cavity with the body, which communicates with the atmosphere and through the atmospheric valve - f. the piston control cavity of the unloading valve, which is connected through the additional control valve to the control cavity of the additional diaphragm, and the control cavity of the main diaphragm is communicated by the throttle channel to the control cavity of the additional diaphragm and through the main control valve to the output cavity.

099826

I 2. The pressure regulator according to claim 1, which is based on the fact that the piston control cavity of the unloading valve is 5 in the form of a T-shaped pipe, in the lower part of which the piston of the unloading valve is placed, and on the opposite ends of it The upper part contains atmospheric seats 10 and additional control valves, with the end of the T-shaped pipe on the saddle side of the atmospheric valve fitted with adjusting nuts for the main compression spring.

Claims (1)

Claim 1. A pressure regulator for a pneumatic brake system, comprising a housing with an inlet cavity connected through a filter and a check valve with an outlet cavity, a main diaphragm installed in the housing, loaded with a main compression spring, 35 main control valve, an unloading valve with a sensing element in the form of a piston connected to the spring-loaded damper associated with the seat of the discharge valve, the outlet of which is in communication with the atmosphere, and an atmospheric valve, as well as control cavities of the main diaphragm and piston p discharge valve, characterized in that, with 45 in order to expand the control range, increase the accuracy and reliability of the regulator, it is equipped with an additional control valve with a sensing element in the form of an additional diaphragm loaded with an additional compression spring, and the damper of the additional control valve connected to its seat is made on the rigid center of the additional the diaphragm, and the flaps of the atmospheric and main control valves associated with their seats are made on opposite sides of the rigid center of the main diaphragm, ⁵ υ. forming with housing additional | the cavity, which is connected with the atmosphere and through the atmospheric valve, with the control chamber of the piston of the discharge valve, which is communicated through the additional control valve with the control cavity of the additional diaphragm, and the control cavity of the main diaphragm is communicated with a throttle channel with the control cavity of the additional diaphragm and through the main control valve with exit cavity. 82.6 I 2. The pressure regulator according to claim 1, wherein the cavity for controlling the piston of the unloading valve is made in the form of a T-shaped pipe, in the lower part of which the piston of the unloading valve is located, and atmospheric seats * are located on opposite ends of its upper part * and an additional control valve, and the end of the T-shaped pipe from the side of the saddle of the atmospheric valve is equipped with adjusting nuts of the main compression spring.