CN114954410A - Double-control self-locking pneumatic control relay valve - Google Patents

Double-control self-locking pneumatic control relay valve Download PDF

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Publication number
CN114954410A
CN114954410A CN202210676872.4A CN202210676872A CN114954410A CN 114954410 A CN114954410 A CN 114954410A CN 202210676872 A CN202210676872 A CN 202210676872A CN 114954410 A CN114954410 A CN 114954410A
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CN
China
Prior art keywords
cavity
relay valve
main valve
relay
ejector rod
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Pending
Application number
CN202210676872.4A
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Chinese (zh)
Inventor
张俊强
贺勃
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Hunan Bobang Heavy Industry Co ltd
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Hunan Bobang Heavy Industry Co ltd
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Publication date
Application filed by Hunan Bobang Heavy Industry Co ltd filed Critical Hunan Bobang Heavy Industry Co ltd
Priority to CN202210676872.4A priority Critical patent/CN114954410A/en
Publication of CN114954410A publication Critical patent/CN114954410A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The invention discloses a double-control self-locking pneumatic control relay valve.A spring, a main valve core and an ejector rod are arranged in a main valve body, the spring is arranged in a first cavity, and two ends of the spring respectively abut against the main valve core and an upper valve body; the upper end of the main valve core is connected with the upper end valve body in a sealing manner to form a third cavity, the main valve core is matched with the main valve body to form a first plane sealing surface P which blocks the communication between the air inlet of the relay valve and the air outlet of the relay valve, and the first plane sealing surface P is a boundary plane of the first cavity and the second cavity; the ejector rod is located between the reset piston and the setting piston, the ejector rod extends upwards into the third cavity, the ejector rod extends downwards into the fourth cavity, the ejector rod is provided with an exhaust channel, the exhaust channel is communicated with an exhaust port of the relay valve, and the main valve core and the ejector rod are matched to form a second plane sealing surface T which blocks the exhaust channel and is communicated with an air outlet of the relay valve. The invention can be switched between the reset state and the set state and self-locked, and the reset state or the set state is still kept unchanged under the condition that the reset port or the set port has no pressure.

Description

Double-control self-locking pneumatic control relay valve
Technical Field
The invention relates to the field of machinery, in particular to a double-control self-locking pneumatic control relay valve.
Background
The relay valve is part of a vehicle pneumatic brake system, and in the brake system of a load-carrying vehicle, the relay valve plays a role in shortening the response time and the pressure build-up time. The air inlet of the relay valve is communicated with the air storage cylinder, and the air outlet is connected with the brake air chamber. When the brake pedal is stepped on, the brake valve is opened, and the air inlet of the relay valve is communicated with the air outlet, so that braking is realized. When the brake pedal is released, the brake valve is closed, the air inlet and the air outlet of the relay valve are disconnected, and the brake is released. In order to realize mutual switching and self-locking between a reset state (namely, a closed state) and a set state (namely, an open state), when no pressure exists at a reset port or the set port, the reset state or the set state is still kept unchanged, and therefore, a double-control self-locking pneumatic control relay valve is urgently needed to be developed.
Disclosure of Invention
In view of this, the invention provides a double-control self-locking pneumatic relay valve, which can be switched between a reset state and a set state and is self-locked, and when the reset port or the set port has no pressure, the reset state or the set state is still kept unchanged.
On one hand, the invention provides a double-control self-locking pneumatic control relay valve, wherein an upper end valve body and a lower end valve body are arranged on a main valve body, a relay valve air inlet and a relay valve air outlet are formed in the main valve body, a first cavity and a second cavity are formed in the main valve body, the relay valve air inlet is communicated with the first cavity, and the relay valve air outlet is communicated with the second cavity; a relay valve reset port and a third cavity are formed in the upper end valve body, a reset piston is installed in the third cavity, and the relay valve reset port is communicated with a cavity above the reset piston; a relay valve position port, a relay valve exhaust port and a fourth cavity are formed in the lower end valve body, a setting piston is installed in the fourth cavity, the relay valve position port is communicated with the cavity below the setting piston, and the relay valve exhaust port is communicated with the cavity above the setting piston;
a spring, a main valve core and a mandril are arranged in the main valve body, the spring is arranged in the first cavity, and two ends of the spring are respectively abutted against the main valve core and the upper valve body; the upper end of the main valve core is connected with the upper end valve body in a sealing manner to form a third cavity, the main valve core is matched with the main valve body to form a first plane sealing surface P which blocks the communication between the air inlet of the relay valve and the air outlet of the relay valve, and the first plane sealing surface P is a boundary plane of the first cavity and the second cavity; the ejector rod is located between the reset piston and the setting piston, the ejector rod extends upwards into the third cavity, the ejector rod extends downwards into the fourth cavity, the ejector rod is provided with an exhaust channel, the exhaust channel is communicated with an exhaust port of the relay valve, and the main valve core and the ejector rod are matched to form a second plane sealing surface T which blocks the exhaust channel and is communicated with an air outlet of the relay valve.
And further, the setting state is included, in the setting state, the setting piston pushes the ejector rod to move upwards, the main valve core moves upwards, the main valve core and the ejector rod are matched to form a second plane sealing surface T to block the exhaust channel and be communicated with the air outlet of the relay valve, the main valve core is separated from the first plane sealing surface P to enable the air inlet of the relay valve to be communicated with the air outlet of the relay valve, the air pressures of the first cavity and the second cavity are the same, the upward thrust of the air pressure of the second cavity to the ejector rod is equal to or greater than the air pressure of the first cavity, and the downward thrust of the spring to the main valve core are achieved, so that the main valve core still keeps the setting state under the condition that the pressure of a relay valve setting port is not applied.
Further, the valve comprises a reset state, in the reset state, the reset piston pushes the mandril to move downwards, the main valve core moves downwards, the main valve core and the main valve body are matched to form a first plane sealing surface P to block the air inlet of the relay valve and the air outlet of the relay valve from being communicated, the main valve core is separated from a second plane sealing surface T to enable the exhaust channel to be communicated with the air outlet of the relay valve, the air pressure of the first cavity is larger than that of the second cavity, the air pressure of the first cavity and the spring push the main valve core downwards, and the main valve core is still kept in the reset state under the condition that no pressure exists in a reset port of the relay valve.
The double-control self-locking pneumatic control relay valve provided by the invention and the prior art have the beneficial effects that: the self-locking reset valve can be switched between the reset state and the set state and can be self-locked, and when the reset port or the set port has no pressure, the reset state or the set state is still kept unchanged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a setting state of a double-control self-locking pneumatic relay valve of the invention;
fig. 2 is a schematic diagram of the reset state of the double-control self-locking pneumatic control relay valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and 2, the invention provides a double-control self-locking pneumatic control relay valve, wherein an upper end valve body 2 and a lower end valve body 3 are installed on a main valve body 1, a relay valve air inlet 10 and a relay valve air outlet 11 are arranged on the main valve body 1, a first cavity and a second cavity are arranged on the main valve body 1, the relay valve air inlet 10 is communicated with the first cavity, and the relay valve air outlet 11 is communicated with the second cavity; a relay valve reset port 20 and a third cavity are formed in the upper end valve body 2, a reset piston 21 is installed in the third cavity, and the relay valve reset port 20 is communicated with a cavity above the reset piston 21; a relay valve position port 30, a relay valve exhaust port 31 and a fourth cavity are formed in the lower end valve body 3, a setting piston 32 is installed in the fourth cavity, the relay valve position port 30 is communicated with the cavity below the setting piston 32, and the relay valve exhaust port 31 is communicated with the cavity above the setting piston 32;
a spring 12, a main valve core 13 and a mandril 14 are arranged in the main valve body 1, the spring 12 is arranged in a first cavity, and two ends of the spring 12 respectively abut against the main valve core 13 and the upper end valve body 2; the upper end of the main valve core 13 is hermetically connected with the upper end valve body 2 to form a third cavity, the main valve core 13 is matched with the main valve body 1 to form a first plane sealing surface P which blocks the communication between the relay valve air inlet 10 and the relay valve air outlet 11, and the first plane sealing surface P is a boundary plane of the first cavity and the second cavity; the ejector rod 14 is located between the reset piston 21 and the set piston 32, the ejector rod 14 extends upwards into the third cavity, the ejector rod 14 extends downwards into the fourth cavity, the ejector rod 14 is provided with an exhaust channel 140, the exhaust channel 140 is communicated with the relay valve exhaust port 31, and the main valve element 13 is matched with the ejector rod 14 to form a second plane sealing surface T which blocks the exhaust channel 140 and is communicated with the relay valve air outlet 11.
As shown in fig. 1, the setting state (i.e., the open state) is included, in the setting state, the setting piston 32 pushes the ejector rod 14 to move upwards, the main valve element 13 moves upwards, the main valve element 13 and the ejector rod 14 cooperate to form a second plane sealing surface T to block the exhaust channel 140 from being communicated with the relay valve outlet 11, the main valve element 13 is separated from the first plane sealing surface P to enable the relay valve inlet 10 to be communicated with the relay valve outlet 11, the air pressures of the first cavity and the second cavity are the same, the upward thrust of the second cavity air pressure on the ejector rod 14 is equal to or greater than the first cavity air pressure, and the downward thrust of the spring 12 on the main valve element 13 is enabled to keep the setting state under the condition that the relay valve port 30 is not pressurized.
As shown in fig. 2, including a reset state (i.e. a closed state), in the reset state, the reset piston 21 pushes the ram 14 to move downwards, the main valve element 13 moves downwards, the main valve element 13 cooperates with the main valve body 1 to form a first plane sealing surface P to block the relay valve inlet 10 from communicating with the relay valve outlet 11, the main valve element 13 is separated from a second plane sealing surface T to make the exhaust passage 140 communicate with the relay valve outlet 11, the first chamber air pressure is greater than the second chamber air pressure, and the first chamber air pressure and the spring 12 push the main valve element 13 downwards, so that the main valve element 13 still maintains the reset state under the condition that the relay valve reset port 20 has no pressure.
The techniques not described above are common general knowledge of the skilled person. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (3)

1. A double-control self-locking pneumatic control relay valve is characterized in that an upper end valve body and a lower end valve body are mounted on a main valve body, a relay valve air inlet and a relay valve air outlet are formed in the main valve body, a first cavity and a second cavity are formed in the main valve body, the relay valve air inlet is communicated with the first cavity, and the relay valve air outlet is communicated with the second cavity; a relay valve reset port and a third cavity are formed in the upper end valve body, a reset piston is installed in the third cavity, and the relay valve reset port is communicated with a cavity above the reset piston; a relay valve position port, a relay valve exhaust port and a fourth cavity are formed in the lower end valve body, a setting piston is installed in the fourth cavity, the relay valve position port is communicated with the cavity below the setting piston, and the relay valve exhaust port is communicated with the cavity above the setting piston;
a spring, a main valve core and a mandril are arranged in the main valve body, the spring is arranged in the first cavity, and two ends of the spring are respectively abutted against the main valve core and the upper valve body; the upper end of the main valve core is connected with the upper end valve body in a sealing manner to form a third cavity, the main valve core is matched with the main valve body to form a first plane sealing surface P which blocks the communication between the air inlet of the relay valve and the air outlet of the relay valve, and the first plane sealing surface P is a boundary plane of the first cavity and the second cavity; the ejector rod is located between the reset piston and the setting piston, the ejector rod extends upwards into the third cavity, the ejector rod extends downwards into the fourth cavity, the ejector rod is provided with an exhaust channel, the exhaust channel is communicated with an exhaust port of the relay valve, and the main valve core and the ejector rod are matched to form a second plane sealing surface T which blocks the exhaust channel and is communicated with an air outlet of the relay valve.
2. The double-control self-locking pneumatic control relay valve according to claim 1, comprising a setting state, wherein in the setting state, the setting piston pushes the ejector rod to move upwards, the main valve core moves upwards, the main valve core and the ejector rod are matched to form a second plane sealing surface T to block an exhaust channel and communicate with an air outlet of the relay valve, the main valve core is separated from the first plane sealing surface P to enable an air inlet of the relay valve to be communicated with the air outlet of the relay valve, the air pressure of the first cavity and the air pressure of the second cavity are the same, the upward thrust of the air pressure of the second cavity to the ejector rod is equal to or greater than the air pressure of the first cavity, and the downward thrust of the spring to the main valve core is enabled to be kept unchanged under the condition that the relay valve position port has no pressure.
3. The double-control self-locking pneumatic control relay valve according to claim 2, which comprises a reset state, wherein in the reset state, the reset piston pushes the mandril to move downwards, the main valve core moves downwards, the main valve core and the main valve body are matched to form a first plane sealing surface P to block the communication between the air inlet of the relay valve and the air outlet of the relay valve, the main valve core is separated from a second plane sealing surface T to enable the exhaust channel to be communicated with the air outlet of the relay valve, the air pressure of a first cavity is greater than the air pressure of a second cavity, the air pressure of the first cavity and the downward thrust of the spring on the main valve core enable the main valve core to be kept in the reset state under the condition that the reset port of the relay valve has no pressure.
CN202210676872.4A 2022-06-16 2022-06-16 Double-control self-locking pneumatic control relay valve Pending CN114954410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210676872.4A CN114954410A (en) 2022-06-16 2022-06-16 Double-control self-locking pneumatic control relay valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210676872.4A CN114954410A (en) 2022-06-16 2022-06-16 Double-control self-locking pneumatic control relay valve

Publications (1)

Publication Number Publication Date
CN114954410A true CN114954410A (en) 2022-08-30

Family

ID=82964508

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210676872.4A Pending CN114954410A (en) 2022-06-16 2022-06-16 Double-control self-locking pneumatic control relay valve

Country Status (1)

Country Link
CN (1) CN114954410A (en)

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