A two-way flow type gas breakaway valve

Abstract

The present invention relates to a two-way flow type gas break valve, comprising a valve body and a break rod, wherein the break rod is arranged in the valve body, an air inlet / air outlet is arranged on the break rod, and an air outlet / air inlet is arranged on the valve body; the gas to be added enters from the air inlet on the break rod / valve body, passes through the flow channel in the valve body and the break rod, and is discharged from the air outlet on the valve body / break rod. The purpose is to provide a two-way flow gas break valve that can ventilate in both directions, a two-way flow gas break valve that can be closed separately after being broken, and the break valve has a simple structure, is easy to manufacture, and is safe and reliable during use.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy equipment, and in particular relates to a two-way flow type gas breakaway valve. 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 make the break valve have a two-way ventilation function, the present invention provides a two-way flow type gas break valve, the air inlet of the break valve can be used as an air outlet, and the corresponding air outlet can be used as an air inlet, thereby ensuring that the break valve can perform two-way ventilation in application scenarios where two-way ventilation is required, and after the break rod is pulled out, the air outlet can be closed in time on the break rod and the valve body to prevent gas leakage.

[0005] The technical solution adopted by the present invention is: a two-way flow type gas breakaway valve, comprising a valve body and a breakaway rod, the breakaway rod is arranged in the valve body, the breakaway rod is provided with an air inlet / air outlet, and the valve body is provided with an air outlet / air inlet; the gas to be added enters from the air inlet on the breakaway rod / valve body, passes through the flow channel in the valve body and the breakaway rod, and is discharged from the air outlet on the valve body / breakaway rod.

[0006] Preferably, a valve core is provided in the pull-out rod, and the valve core can move relative to the pull-out rod; the valve core is used to open the flow channel in the pull-out rod when the pull-out rod is connected to the valve body, and is used to close the flow channel in the pull-out rod when the pull-out rod is separated from the valve body.

[0007] Preferably, the 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, and a first spring is provided at the other end of the self-sealing valve core, and the other end of the first spring is connected to the inner wall of the pull-off rod; when the pull-off rod is separated from the valve body, the first spring drives the self-sealing valve core to close the flow channel in the pull-off rod.

[0008] Preferably, a step groove is provided in the pull-out rod, the 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 first limiting hole is provided at one end of the pull-out rod, and a first limiting ball is provided in the first limiting hole; when the valve core is connected to the valve body by the pull-out rod, the first limiting ball contacts the end of the valve core body.

[0009] Preferably, a core stop piece is provided in the pull-out rod, and the core stop piece is arranged on the large radius side of the step slide groove. The core stop piece contacts the self-sealing valve core to constitute a limit for the self-sealing valve core, and one end of the first spring passes through the core stop piece and is connected to the inner wall of the pull-out rod.

[0010] 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, and a third flow hole is provided on one end of the pull-out rod provided with a first limiting ball; the first flow hole is connected to the air inlet / outlet on the pull-out rod, and the third flow hole is connected to the flow channel in the valve body; the first flow hole, the step groove, the second flow hole and the third flow hole are connected to form the flow channel in the pull-out rod.

[0011] Preferably, the valve body includes a flow-through body and a piston, the piston is arranged in the flow-through body, and the pull-out rod is arranged in the piston; a limiting surface is arranged in the piston, and the limiting surface squeezes the first limiting ball so that the first limiting ball contacts the end of the valve core body.

[0012] Preferably, a second limiting hole is provided on the side wall of the piston, a second limiting ball is provided in the second limiting hole, the second limiting ball is matched with the first groove on the outer side wall of the pull-out rod, and the second limiting ball constitutes a limit in the axial direction of the pull-out rod.

[0013] Preferably, a pull-off positioning piece is also provided in the flow-through body, and the pull-off positioning piece is fixedly connected to the flow-through body, and a third limiting hole is provided on the side wall of the pull-off positioning piece, and a third limiting ball is provided in the third limiting hole, and the third limiting ball is connected to the fixing screw through a second spring, and the fixing screw is connected to the pull-off positioning piece; the third limiting ball is adapted to the second groove on the pull-off rod.

[0014] Preferably, a first flow channel is provided on the piston, and a second flow channel is provided on the flow-through body. The first flow channel is connected to the third flow hole, and the second flow channel is connected to the air outlet / inlet on the valve body. The first flow channel and the second flow channel are connected to form a flow channel in the valve body.

[0015] The present invention has the following beneficial effects:

[0016] 1) The two-way flow gas breakaway valve of the present invention can realize a two-way ventilation function, that is, the gas inlet on the breakaway valve can be used as a gas outlet, and the corresponding gas outlet can be used as a gas inlet, and after breaking, each is closed to prevent the added gas from leaking into the surrounding environment, thereby polluting the surrounding environment and causing safety hazards;

[0017] 2) A valve core is added to the pull-off rod in the present invention. Through the setting of the valve core, it can maintain a normally open state when filling with gas, without affecting the filling of gas, so that gas can enter from both the air inlet and the air outlet; when pulling off, the valve core moves, so that the self-sealing valve core on the valve core is adapted to the inner wall of the pull-off rod, thereby closing the flow channel in the pull-off rod and preventing the gas inside from leaking out; the gas pull-off valve of the present invention can be repeatedly installed and used after being pulled off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a first structural schematic diagram of the present invention;

[0020] Figure 2 It is a second structural schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the breakaway valve being broken.

[0022] In the figure: 1-valve core body; 2-pull-off rod; 3-self-sealing valve core; 4-first spring; 5-first inlet and outlet; 6-second flow hole; 7-first limit hole; 8-second limit ball; 9-first limit ball; 10-flow body; 11-second inlet and outlet; 12-third flow hole; 13-first flow channel; 14-hollow flow channel; 15-nylon rubber sleeve; 16-third limit ball; 17-second spring; 18-step slide; 19-first flow hole; 20-second flow channel; 21-valve core guide nail; 22-core stop member; 23-piston; 24-limiting surface; 25-pull-off positioning member; 26-fixing screw; 27-third flow channel. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1-3 As shown, a two-way flow type gas break valve comprises a valve body and a break rod 2, wherein the break rod 2 is arranged in the valve body, the break rod 2 is provided with an air inlet / air outlet, and the valve body is provided with an air outlet / air inlet, that is, when the first inlet and outlet 5 on the break rod 2 is used as an air inlet, the second inlet and outlet 11 on the valve body is used as an air outlet; when the first inlet and outlet 5 on the break rod 2 is used as an air outlet, the second inlet and outlet 11 on the valve body is used as an air inlet, thereby achieving the purpose of two-way ventilation.

[0025] The gas to be added enters from the air inlet on the pull-out rod 2 / valve body, passes through the flow channel in the valve body and the pull-out rod 2, and is discharged from the air outlet on the valve body / pull-out rod 2.

[0026] A valve core is arranged in the pull-out rod 2, and the valve core can move relative to the pull-out rod 2; the 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.

[0027] The 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 21. The cross-section of the valve core guide pin 21 is trapezoidal, and the smaller cross-section of the valve core guide pin 21 is arranged toward the valve core body 1. When pulled off, the valve core guide pin 21 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.

[0028] The other end of the self-sealing valve core 3 is provided with a first spring 4, and the other end of the first 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 first 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 first spring 4 pushes the self-sealing valve core 3 to move upward due to the elastic force ( Figure 1 ), thereby closing the flow channel.

[0029] The pull-off rod 2 is provided with a step groove 18, and the valve core is arranged in the step groove 18. The self-sealing valve core 3 is adapted to the large radius section of the step groove 18. When the first 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 18, so that the end face of the self-sealing valve core 3 contacts the step surface, thereby closing the flow channel; a first limiting hole 7 is provided at one end of the pull-off rod 2, and a first limiting ball 9 is arranged in the first limiting hole 7; when the valve core is connected to the valve body by the pull-off rod 2, the first limiting ball 9 contacts the end of the valve core body 1, so that in the gas filling state, the first limiting ball 9 can limit the axial movement of the valve core body 1, so that the self-sealing valve core 3 and the step surface of the step groove 18 are separated to form a gas circulation channel. At this time, the third circulation hole 12 is in an open state, and the filling gas can smoothly enter the valve body from the pull-off rod 2.

[0030] A core stop member 22 is provided in the pull-out rod 2, and the core stop member 22 is arranged on the large radius side of the step slide groove 18. The core stop member 22 contacts the self-sealing valve core 3 to limit the self-sealing valve core 3. One end of the first spring 4 passes through the core stop member 22 and is connected to the inner wall of the pull-out rod 2. The core stop member 22 can support the valve core.

[0031] The self-sealing valve core 3 is provided with a first flow hole 19, the valve core body 1 is hollow inside to form a hollow flow channel 14, 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 12 on one end of the first limit ball 9; the first flow hole 19 is connected with the air inlet / outlet on the pull-off rod, and the third flow hole 12 is connected with the flow channel in the valve body, and the first flow hole 19, the step chute 18, the second flow hole 6 and the third flow hole 12 are connected to form the flow channel in the pull-off rod 2. When the first inlet and outlet 5 is used as an air inlet, the gas enters from the first inlet and outlet 5, flows through the first flow hole 19, enters the step chute 18, enters the second flow hole 6, enters the hollow flow channel 14, and then flows into the valve body from the third flow hole 12 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 19 and the second flow hole 6 is closed.

[0032] The valve body includes a flow body 10 and a piston 23, wherein the piston 23 is arranged in the flow body 10, and the pull-off rod 2 is arranged in the piston 23; a limiting surface 24 is arranged in the piston 23, and the limiting surface 24 squeezes the first limiting ball 9 so that the first limiting ball 9 contacts the end of the valve core body 1. When the pull-off rod 2 is in the piston 23, the inner wall of the piston 23 forms the limiting surface 24, so that the first limiting ball 9 moves toward the axial direction of the valve core body 1, so that the first limiting ball 9 abuts against the end of the valve core body 1, and the axial movement of the valve core body 1 is limited. When the pull-off rod 2 is separated from the piston 23, the limiting surface 24 releases the restriction on the first limiting ball 9, so that the first limiting ball 9 moves in a direction away from the axis of the valve core body 1. At this time, the first limiting ball 9 releases the restriction on the valve core body 1, and the valve core body 1 moves upward under the action of the first spring 4, thereby closing the flow channel in the pull-off rod 2.

[0033] A second limiting hole is provided on the side wall of the piston 23, a second limiting ball 8 is provided in the second limiting hole, the second limiting ball 8 is matched with the first groove on the outer side wall of the pull-off rod 2, and the second limiting ball 8 constitutes a limit in the axial direction of the pull-off rod 2. When pulling off, due to the effect of the second limiting ball 8, the pull-off rod 2 drives the piston 23 to move away from the flow-through body 10, so that the first flow channel 13 and the third flow channel 27 are misaligned, thereby closing the internal flow channel of the valve body.

[0034] A pull-off positioning member 25 is also provided in the flow-through body 10, and the pull-off positioning member 25 is fixedly connected to the flow-through body 10. A third limiting hole is provided on the side wall of the pull-off positioning member 25, and a third limiting ball 16 is provided in the third limiting hole. The third limiting ball 16 is connected to a fixing screw 26 through a second spring 17, and the fixing screw 26 is connected to the pull-off positioning member 15; the third limiting ball 16 is adapted to the second groove on the pull-off rod 2. The third limiting ball 16 can limit the pull-off rod 2.

[0035] The piston 23 is provided with a first flow channel 13, and the flow-through body 10 is provided with a second flow channel 20. The first flow channel 13 is connected to the third flow hole 12, and the second flow channel 20 is connected to the air outlet / inlet on the valve body. The first flow channel 13 and the second flow channel 20 are connected to form a flow channel in the valve body.

[0036] Specific working method: take the first inlet and outlet 5 as the air inlet and the second inlet and outlet 11 as the air outlet as an example. Figure 1 , Figure 2It is in a normal ventilation state. At this time, the gas flow path is to enter from the first inlet and outlet 5, flow through the first flow hole 19 and then enter the step chute 18, then enter the second flow hole 6 and then enter the hollow flow channel 14, and then flow from the third flow hole 12 on the pull-off rod 2 into the first flow channel 13, then pass through the third flow channel 27 into the second flow channel 20, and finally flow out from the second inlet and outlet 11.

[0037] like Figure 3 The figure shows a schematic diagram of the pull-out state. After being pulled off, the pull-out rod 2 drives the piston 23 to move downward. At this time, the first flow channel 13 and the third flow channel 27 are misaligned, thereby closing the flow channel in the valve body; at this time, the pull-out rod 2 continues to move downward and finally separates from the valve body. When separating from the valve body, the limiting surface 24 in the piston 23 releases the restriction on the first limiting ball 9, so that the valve core body 1 moves upward under the action of the first spring 4, thereby closing the flow channel inside the pull-out rod 2, thereby realizing the respective closure of the valve body and the pull-out rod 2.

[0038] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to be limiting of the present invention. As long as they are within the spirit and scope of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A two-way flow type gas breakaway valve, characterized in that: It comprises a valve body and a pull-out rod (2), wherein the pull-out rod (2) is arranged in the valve body, an air inlet / air outlet is arranged on the pull-out rod (2), and an air outlet / air inlet is arranged on the valve body; the gas to be added enters from the air inlet on the pull-out rod (2) / valve body, passes through the flow channel in the valve body and the pull-out rod (2), and is discharged from the air outlet on the valve body / pull-out rod (2); A valve core is arranged in the pull-out rod (2), and the valve core can move relative to the pull-out rod (2); the 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; The 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 (21); a first spring (4) is provided at the other end of the self-sealing valve core (3); the other end of the first 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 first spring (4) drives the self-sealing valve core (3) to close the flow channel in the pull-off rod (2); The valve body comprises a flow-through body (10) and a piston (23), wherein the piston (23) is arranged in the flow-through body (10), the pull-off rod (2) is arranged in the piston (23), a second limiting hole is arranged on the side wall of the piston (23), a second limiting ball (8) is arranged in the second limiting hole, and a pull-off positioning piece (25) is also arranged in the flow-through body (10); The piston (23) is provided with a first flow channel (13), the flow-through body (10) is provided with a second flow channel (20), and the first flow channel (13) is in communication with the third flow hole (12); The self-sealing valve core (3) is provided with a first flow hole (19), 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 first limiting ball (9) at one end thereof and a third flow hole (12); the first flow hole (19) is connected to an air inlet / air outlet on the pull-out rod, and the third flow hole (12) is connected to a flow channel in the valve body; the first flow hole (19), the step groove (18), the second flow hole (6) and the third flow hole (12) are connected to form a flow channel in the pull-out rod (2).

2. The two-way flow type gas breakaway valve according to claim 1, characterized in that: The pull-off rod (2) is provided with a step groove (18), the valve core is arranged in the step groove (18), and the self-sealing valve core (3) is adapted to the large radius section of the step groove (18); a first limiting hole (7) is provided at one end of the pull-off rod (2), and a first limiting ball (9) is arranged in the first limiting hole (7); when the valve core is connected to the valve body by the pull-off rod (2), the first limiting ball (9) contacts the end of the valve core body (1).

3. The two-way flow type gas breakaway valve according to claim 2, characterized in that: A core stopper (22) is provided in the pull-off rod (2), and the core stopper (22) is arranged on the large radius side in the step slide groove (18). The core stopper (22) contacts the self-sealing valve core (3) to limit the self-sealing valve core (3), and one end of the first spring (4) passes through the core stopper (22) and is connected to the inner wall of the pull-off rod (2).

4. The two-way flow type gas breakaway valve according to claim 3, characterized in that: A limiting surface (24) is provided in the piston (23), and the limiting surface (24) squeezes the first limiting ball (9) so that the first limiting ball (9) contacts the end of the valve core body (1).

5. The two-way flow type gas breakaway valve according to claim 4, characterized in that: The second limiting ball is matched with the first groove on the outer side wall of the pull-out rod (2), and the second limiting ball constitutes a limit for the pull-out rod (2) in the axial direction.

6. The two-way flow type gas breakaway valve according to claim 4, characterized in that: The pull-off positioning member (25) is fixedly connected to the flow-through body (10); a third limiting hole is provided on the side wall of the pull-off positioning member (25); a third limiting ball (16) is provided in the third limiting hole; the third limiting ball (16) is connected to the fixing screw (26) via a second spring (17); the fixing screw (26) is connected to the pull-off positioning member (25); the third limiting ball (16) is matched with the second groove on the pull-off rod (2).

7. The two-way flow type gas breakaway valve according to any one of claims 4 to 6, characterized in that: The second flow channel (20) is in communication with the air outlet / air inlet on the valve body, and the first flow channel (13) and the second flow channel (20) are in communication to form a flow channel in the valve body.

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