A valve core for a breakaway valve and a two-way ventilation method

Abstract

The present invention relates to the technical field of new energy equipment, and specifically to a valve core for a breakaway valve and a two-way ventilation method, comprising a breakaway rod, the breakaway rod being arranged in a valve body, the breakaway rod being provided with an inlet and an outlet, and the breakaway rod being provided with a normally open valve core; the normally open valve core can move relative to the breakaway rod, and the normally open valve core is used to open the flow channel in the breakaway rod when the breakaway rod is connected to the valve body, and is used to close the flow channel in the breakaway rod when the breakaway rod is separated from the valve body. The purpose is to provide a movable normally open valve core in the breakaway rod so that the breakaway valve has a two-way ventilation function, and after being broken away, the inlet and outlet can be closed separately, thereby ensuring that the inlet and outlet are closed after the two-way ventilation is broken away, and the gas will not leak out and affect the surrounding environment.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy equipment, and in particular relates to a valve core for a breakaway valve and a two-way ventilation method. Background Art

[0002] The breakaway valve is used on new energy equipment when refueling. After the refueling operation is completed, if the refueling pipeline is accidentally pulled, the breakaway valve can be used to close the refueling pipeline to prevent the refueled hydrogen from leaking into the surrounding environment and causing safety hazards.

[0003] However, most of the process breakaway valves on the market have only one-way ventilation function. For two-way ventilation, that is, the air inlet for gas filling can also be used as the air outlet, this kind of breakaway valve for two-way ventilation is rarely involved. For some scenarios where a two-way ventilation breakaway valve is required, its use will be restricted. Summary of the invention

[0004] In order to solve the problem that a breakaway valve has a two-way ventilation function, the present invention provides a valve core for a breakaway valve and a two-way ventilation method. By arranging a movable normally open valve core in a breakaway rod, the breakaway valve has a two-way ventilation function, and after being broken away, the inlet and outlet can be closed separately, thereby ensuring that the two-way ventilation inlet and outlet are closed after being broken away, and gas will not leak out and affect the surrounding environment.

[0005] The technical solution adopted by the present invention is: a valve core for a breakaway valve, including a breakaway rod, the breakaway rod is arranged in a valve body, the breakaway rod is provided with an inlet and an outlet, and a normally open valve core is arranged in the breakaway rod; the normally open valve core can move relative to the breakaway rod, and the normally open valve core is used to open the flow channel in the breakaway rod when the breakaway rod is connected to the valve body, and is used to close the flow channel in the breakaway rod when the breakaway rod is separated from the valve body.

[0006] Preferably, the normally open valve core includes a valve core body and a self-sealing valve core, the valve core body and the self-sealing valve core are fixedly connected by a valve core guide pin, the other end of the self-sealing valve core is provided with a spring, and the other end of the spring is connected to the inner wall of the pull-off rod; when the pull-off rod is separated from the valve body, the spring drives the self-sealing valve core to close the flow channel in the pull-off rod.

[0007] Preferably, a step groove is provided in the pull-out rod, the normally open valve core is arranged in the step groove, and the self-sealing valve core is adapted to the large radius section of the step groove; a limiting hole is provided at one end of the pull-out rod, and a limiting ball is provided in the limiting hole; when the valve core is connected to the valve body by the pull-out rod, the limiting ball contacts the end of the valve core body.

[0008] Preferably, a core stop piece is provided in the pull-out rod, and the core stop piece is arranged on the large radius side in the step slide groove. The core stop piece contacts the self-sealing valve core to limit the self-sealing valve core, and one end of the spring passes through the core stop piece and is connected to the inner wall of the pull-out rod.

[0009] Preferably, a first flow hole is provided on the self-sealing valve core, the valve core body is hollow inside, a second flow hole is provided on the valve core body 6), and a third flow hole is provided on one end of the pull-out rod on which a limiting ball is provided; the first flow hole is connected with the inlet and outlet on the pull-out rod, and the third flow hole is connected with the flow channel in the valve body, and the first flow hole, the step groove, the second flow hole and the third flow hole are connected to form a flow channel in the pull-out rod.

[0010] Preferably, a first limiting groove is provided on the side wall of the pull-off rod, the first limiting groove is arranged at an end close to the limiting ball, and the first limiting groove is used to adapt to the piston inside the valve body for limiting connection.

[0011] Preferably, a second limiting groove is provided on the side wall of the pull-off rod, the second limiting groove is provided at one end close to the inlet and outlet, and the second limiting groove is used for matching and connecting with the valve body for limiting.

[0012] A two-way ventilation method for a breakaway valve comprises the following steps: a normally open valve core movable relative to a breakaway rod connected to a valve body is arranged in the breakaway rod; when the breakaway rod is connected to the valve body, the normally open valve core opens a flow channel in the breakaway rod, so that the flow channel in the breakaway rod is connected to the flow channel in the valve body to form a two-way ventilation flow channel; and when the breakaway rod is separated from the valve body, the flow channels in the valve body and the breakaway rod are respectively closed.

[0013] Preferably, when the pull-off rod is separated from the valve body, the flow channel in the pull-off rod is closed after the normally open valve core moves; and the flow channel in the valve body is closed after the piston in the valve body moves.

[0014] Preferably, when the pull-off rod is connected to the valve body, the normally open valve core is opened by the piston in the valve body through the limiting structure to keep the flow channel in the pull-off rod unobstructed.

[0015] The present invention is beneficial in that:

[0016] 1) The present invention provides a valve core for a breakaway valve, in which a normally open valve core is added in a breakaway rod, and the opening and closing of the flow channel in the breakaway rod are realized by the movement of the normally open valve core, so as to ensure that after the breakaway valve body and the breakaway rod are closed respectively, so as to prevent the injected gas from leaking into the surrounding environment, thereby polluting the surrounding environment and causing safety hazards;

[0017] 2) The valve core for the breakaway valve of the present invention is suitable for two-way circulation of gas and can be repeatedly installed and used after being broken; the valve core for the breakaway valve of the present invention can be adapted for use on an existing breakaway valve, and a normally open valve core is added to the breakaway rod in the existing breakaway valve; when breaking away, the normally open valve core closes the flow channel in the breakaway rod, and the breakaway valve body closes the flow channel through the original closing structure (piston) in the valve body, thereby achieving the purpose of two-way ventilation and respective closure after breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the present invention adapted in a breakaway valve.

[0020] In the figure: 1-valve core body; 2-pull-off rod; 3-self-sealing valve core; 4-spring; 5-limiting ball; 6-second flow hole; 7-third flow hole; 8-limiting hole; 9-hollow flow channel; 10-first limiting groove; 11-second limiting groove; 12-valve core guide pin; 13-step slide groove; 14-first flow hole; 15-core stop; 16-inlet and outlet; 17-small ball; 18-piston; 19-valve body; 20-flow port; 21-positioning ball; 22-positioning spring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] like Figure 1 As shown, a valve core for a breakaway valve, the valve core provided by the present invention is suitable for an existing breakaway valve, thereby realizing a two-way ventilation function.

[0023] Specifically, it includes a pull-out rod 2, which is arranged in the valve body, and the pull-out rod 2 is adaptively connected with the valve body 19. The pull-out rod 2 is provided with an inlet and outlet 16, which can be used for air intake or air discharge. According to different actual ventilation directions, the functions of the inlet and outlet 16 are different. A normally open valve core is arranged in the pull-out rod 2; the normally open valve core can move relative to the pull-out rod 2, and the normally open valve core is used to open the flow channel in the pull-out rod 2 when the pull-out rod 2 is connected to the valve body, and is used to close the flow channel in the pull-out rod 2 when the pull-out rod 2 is separated from the valve body. Since the normally open valve core always keeps the function of opening the flow channel in the pull-out rod 2 in the pull-out rod 2, the purpose of two-way ventilation can be achieved according to actual use requirements, that is, the gas to be added can enter from the inlet and outlet 16 on the pull-out rod 2 and flow out from the flow port 20 on the valve body 19; or enter from the flow port 20 on the valve body 19 and flow out from the inlet and outlet 16 on the pull-out rod 2. It can be understood that when gas is added, the gas enters the pull-out rod 2, flows into the valve body 19 through the flow channel inside the pull-out rod 2, and finally flows out from the flow port 20. By setting a normally open valve core, the flow channel inside the pull-out rod 2 can be closed in time when the pull-out rod 2 is pulled out, thereby avoiding leakage of the added gas.

[0024] The normally open valve core includes a valve core body 1 and a self-sealing valve core 3, and the valve core body 1 and the self-sealing valve core 3 are fixedly connected by a valve core guide pin 12. The cross-section of the valve core guide pin 12 is trapezoidal, and the smaller cross-section of the valve core guide pin 12 is arranged toward the valve core body 1. When pulled off, the valve core guide pin 12 contacts the inner wall of the pull-off rod 2, so that the self-sealing valve core 3 closes the flow channel in the pull-off rod 2.

[0025] The other end of the self-sealing valve core 3 is provided with a spring 4, and the other end of the spring 4 is connected to the inner wall of the pull-off rod 2; when the pull-off rod 2 is separated from the valve body, the spring 4 drives the self-sealing valve core 3 to close the flow channel in the pull-off rod 2. When the pull-off rod 2 is separated, the spring 4 pushes the self-sealing valve core 3 to move upward due to the elastic force ( Figure 1 ), thereby closing the flow channel.

[0026] The pull-off rod 2 is provided with a step groove 13, and the normally open valve core is provided in the step groove 13. The self-sealing valve core 3 is adapted to the large radius section of the step groove 13. When the spring 4 drives the self-sealing valve core 3 to move, the self-sealing valve core 3 moves toward a section with a smaller radius in the step groove 13, so that the end face of the self-sealing valve core 3 contacts the step surface, thereby closing the flow channel; a limiting hole 8 is provided at one end of the pull-off rod 2, and a limiting ball 5 is provided in the limiting hole 8; when the valve core is connected to the valve body by the pull-off rod 2, the limiting ball 5 contacts the end of the valve core body 1, so that in the gas filling state, the limiting ball 5 can limit the axial movement of the valve core body 1, so that the self-sealing valve core 3 is separated from the step surface of the step groove 13 to form a gas circulation channel. At this time, the third circulation hole 7 is in an open state, and the filling gas can smoothly enter the valve body 19 from the pull-off rod 2.

[0027] A core stop member 15 is provided in the pull-out rod 2. The core stop member 15 is arranged on the large radius side of the step slide groove 13. The core stop member 15 contacts the self-sealing valve core 3 to limit the self-sealing valve core 3. One end of the spring 4 passes through the core stop member 15 and is connected to the inner wall of the pull-out rod 2. The core stop member 15 can support the normally open valve core.

[0028] The self-sealing valve core 3 is provided with a first flow hole 14, the valve core body 1 is hollow inside to form a hollow flow channel 9, the valve core body 1 is provided with a second flow hole 6, and the pull-off rod 2 is provided with a third flow hole 7 on one end of the limited ball 5; the first flow hole 14 is connected with the inlet and outlet 16 on the pull-off rod, and the third flow hole 7 is connected with the flow channel in the valve body, and the first flow hole 14, the step chute 13, the second flow hole 6 and the third flow hole 7 are connected to form the flow channel in the pull-off rod 2. When the inlet and outlet 16 are used as an air inlet, the gas enters from the inlet and outlet 16, flows through the first flow hole 14, enters the step chute 13, enters the second flow hole 6, enters the hollow flow channel 9, and then flows into the valve body 19 from the third flow hole 7 on the pull-off rod 2; when the pull-off rod 2 is pulled off, the self-sealing valve core 3 moves upward to close the flow channel, so that the flow channel between the first flow hole 14 and the second flow hole 6 is closed.

[0029] The side wall of the pull-off rod 2 is provided with a first limiting groove 10, which is provided at one end close to the limiting ball 5, and is used to adapt and connect with the piston 18 inside the valve body 19 to limit the position. Figure 2, which is a schematic diagram of the structure in which the valve core is connected to the valve body 19, a small ball 17 is arranged on the piston 18, and when installed, the small ball 17 is matched with the first limiting groove 10, and the small ball 17 constitutes a limit in the axial direction of the pull-off rod 2. When pulled off, due to the action of the small ball 17, the pull-off rod 2 drives the piston 18 to move away from the valve body 19, so that the flow channel on the piston 18 is misaligned with the flow channel in the valve body 19, thereby closing the internal flow channel of the valve body 19.

[0030] A second limiting groove 11 is provided on the side wall of the pull-off rod 2. The second limiting groove 11 is provided at one end close to the inlet and outlet 16. The second limiting groove 11 is used to match and connect with the valve body to limit the position. A positioning ball 21 is provided on the valve body 19. The positioning ball 21 is connected to the fixing screw through a positioning spring 22. The positioning ball 21 matches the second limiting groove 11 to limit the pull-off rod 2.

[0031] Based on the above-mentioned valve core for a breakaway valve, the present invention provides a two-way ventilation method for a breakaway valve, wherein a normally open valve core that can move relative to the breakaway rod 2 is arranged in a breakaway rod 2 connected to a valve body; when the breakaway rod 2 is connected to the valve body, the normally open valve core opens the flow channel in the breakaway rod 2, so that the flow channel in the breakaway rod 2 is connected to the flow channel in the valve body to form a two-way ventilation flow channel; and when the breakaway rod 2 is separated from the valve body, the flow channels in the valve body and the breakaway rod 2 are respectively closed.

[0032] When the pull-off rod 2 is separated from the valve body, the flow channel in the pull-off rod 2 is closed after the normally open valve core moves; the flow channel in the valve body is closed after the piston in the valve body moves.

[0033] When the pull-off rod 2 is connected to the valve body, the normally open valve core is opened by the piston in the valve body through the limit structure to keep the flow channel in the pull-off rod 2 unobstructed.

[0034] The specific working method is as follows: the inlet and outlet 16 is used as the air inlet and the flow port 20 is used as the air outlet. During normal ventilation, the flow path of the gas is to enter from the inlet and outlet 16, flow through the first flow hole 14, enter the step chute 13, enter the second flow hole 6, enter the hollow flow channel 9, and then flow from the third flow hole 7 on the pull-off rod 2 into the flow channel in the valve body 19, and finally flow out from the flow port 20.

[0035] When pulled apart, the pull-out rod 2 drives the piston 18 to move downward. At this time, the flow channel on the piston 18 and the flow channel on the valve body 19 are misaligned, thereby closing the flow channel in the valve body 19; at this time, the pull-out rod 2 continues to move downward and finally separates from the valve body 19. When separating from the valve body 19, the limiting surface in the piston 18 releases the restriction on the limiting ball 5, so that the valve core body 1 moves upward under the force of the spring 4, thereby closing the flow channel inside the pull-out rod 2, realizing the respective closure of the flow channels inside the valve body 19 and the pull-out rod 2, thereby ensuring that no matter from which direction the ventilation is carried out, it can be closed to avoid gas leakage.

[0036] The above embodiments are preferred embodiments. It should be noted that the above preferred embodiments should not be regarded as limiting the invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A valve core for a breakaway valve, comprising a breakaway rod (2), wherein the breakaway rod (2) is arranged in a valve body, and characterized in that: The pull-out rod (2) is provided with an inlet and outlet (16), and a normally open valve core is provided in the pull-out rod (2); the normally open valve core is movable relative to the pull-out rod (2), and the normally open valve core is used to open the flow passage in the pull-out rod (2) when the pull-out rod (2) is connected to the valve body, and is used to close the flow passage in the pull-out rod (2) when the pull-out rod (2) is separated from the valve body; The normally open valve core comprises a valve core body (1) and a self-sealing valve core (3); the valve core body (1) and the self-sealing valve core (3) are fixedly connected via a valve core guide pin (12); a spring (4) is provided at the other end of the self-sealing valve core (3); the other end of the spring (4) is connected to the inner wall of the pull-off rod (2); when the pull-off rod (2) is separated from the valve body, the spring (4) drives the self-sealing valve core (3) to close the flow channel in the pull-off rod (2); The cross section of the valve core guide pin (12) is arranged in a trapezoidal shape, and the smaller cross section of the valve core guide pin (12) is arranged toward the valve core body (1); The pull-off rod (2) is provided with a step groove (13), the normally open valve core is arranged in the step groove (13), and the self-sealing valve core (3) is adapted to the large radius section of the step groove (13); a limit hole (8) is provided at one end of the pull-off rod (2), and a limit ball (5) is provided in the limit hole (8); when the valve core is connected to the valve body by the pull-off rod (2), the limit ball (5) contacts the end of the valve core body (1); A core stopper (15) is provided in the pull-off rod (2), and the core stopper (15) is arranged on the large radius side in the step slide groove (13). The core stopper (15) contacts the self-sealing valve core (3) to limit the self-sealing valve core (3), and one end of the spring (4) passes through the core stopper (15) and is connected to the inner wall of the pull-off rod (2); The self-sealing valve core (3) is provided with a first flow hole (14); the valve core body (1) is hollow inside; the valve core body (1) is provided with a second flow hole (6); and the pull-out rod (2) is provided with a third flow hole (7) at one end thereof on which a limiting ball (5) is provided; the first flow hole (14) is connected to an inlet and outlet (16) on the pull-out rod, and the third flow hole (7) is connected to a flow channel in the valve body; the first flow hole (14), the step groove (13), the second flow hole (6) and the third flow hole (7) are connected to form a flow channel in the pull-out rod (2).

2. The valve core for a breakaway valve according to claim 1, characterized in that: A first limiting groove (10) is provided on the side wall of the pull-off rod (2), the first limiting groove (10) being arranged at one end close to the limiting ball (5), and the first limiting groove (10) being used for matching and connecting with the piston inside the valve body for limiting.

3. The valve core for a breakaway valve according to claim 2, characterized in that: A second limiting groove (11) is provided on the side wall of the pull-off rod (2), the second limiting groove (11) being arranged at one end close to the inlet and outlet (16), and the second limiting groove (11) is used for being adapted to be connected with the valve body for limiting position.

4. A two-way ventilation method for a breakaway valve, using the breakaway valve core according to claim 1, characterized in that: A normally open valve core is provided in a pull-out rod (2) connected to the valve body and is movable relative to the pull-out rod (2); when the pull-out rod (2) is connected to the valve body, the normally open valve core opens a flow passage in the pull-out rod (2), so that the flow passage in the pull-out rod (2) is connected to the flow passage in the valve body to form a two-way flow passage; and when the pull-out rod (2) is separated from the valve body, the flow passages in the valve body and the pull-out rod (2) are respectively closed.

5. The breakaway valve two-way ventilation method according to claim 4, characterized in that: When the pull-off rod (2) is separated from the valve body, the flow channel in the pull-off rod (2) is closed after the normally open valve core moves; and the flow channel in the valve body is closed after the piston in the valve body moves.

6. The breakaway valve two-way ventilation method according to claim 5, characterized in that: When the pull-off rod (2) is connected to the valve body, the normally open valve core is opened by the piston in the valve body through the limit structure, thereby keeping the flow channel in the pull-off rod (2) unobstructed.

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