Breaking valve

Abstract

The invention belongs to the technical field of gas conveying, and provides a break-away valve which comprises a valve body assembly, a first valve body, a second valve body and a valve rod assembly. The first end of the second valve body is fixedly connected with the second end of the first valve body; the third valve body is movably connected with the second valve body, so that the third valve body can be pulled out of the second valve body; the first locking assembly is arranged on the second valve body and the third valve body and used for locking the third valve body at a preset position; the first valve element is inserted into the second through hole; the first driving assembly is arranged in the valve body assembly and is in transmission connection with the first valve element; the second valve element is arranged in the first through hole; and the second driving assembly is arranged in the valve body assembly and is in transmission connection with the second valve element. The snap valve provided by the invention is simple in structure, reasonable in design and convenient to assemble, replace and overhaul.

Description

Technical Field

[0001] The invention relates to the technical field of gas delivery, and in particular to a breakaway valve. Background Art

[0002] A breakaway valve can prevent leakage accidents caused by pipeline rupture due to tension. For example, in the process of delivering gas (such as hydrogen) to a car, a breakaway valve is usually installed on the connecting pipe to prevent hydrogen leakage caused by the breakage of the delivery pipeline due to accidental movement of the car. When the tension exerted by the car on the delivery pipeline is greater than the preset value, the breakaway valve will break automatically, thereby achieving the purpose of preventing gas leakage.

[0003] Specifically, the core mechanism of the breakaway valve includes a double one-way valve design. When the breakaway valve is broken by external force, the one-way valve and the air inlet cavity are effectively cut off, thereby achieving the effect of "breakaway without leakage", which greatly eliminates safety hazards. This design not only protects the safety of personnel and equipment, but also allows the breakaway valve to be reused, that is, it can be reset and reused after being broken. However, the breakaway valve in the prior art has a complex internal structure and is difficult to repair. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a breakaway valve to solve or alleviate the above-mentioned technical problems in the prior art.

[0005] In order to achieve the above object, the present invention provides a breakaway valve, comprising:

[0006] A valve body assembly, comprising:

[0007] A first valve body, which is provided with a first air passage, a first end of which is fixedly connected to a first connector, and the first air passage is in communication with the first connector;

[0008] A second valve body, which has a first through hole formed along its own axis, and a first end of which is fixedly connected to the second end of the first valve body; and

[0009] A third valve body, which has a second through hole formed along its own axial centerline direction, a first end of which is inserted into the first through hole, a second air passage is formed between the outer side wall thereof and the inner side wall of the first through hole, the second air passage is communicated with the first air passage, the third valve body is movably connected with the second valve body, so that the third valve body can be pulled out of the first through hole, the second end of the third valve body is fixedly connected with the second joint, and the second joint is communicated with the second through hole;

[0010] a first locking assembly, which is arranged on the second valve body and the third valve body, and is used to lock the third valve body at a preset position, and when the pulling force applied to the third valve body exceeds a preset value, the first locking assembly releases the lock on the third valve body, so that the third valve body can be pulled out of the first through hole;

[0011] a first valve core, which is inserted into the second through hole, and a third air channel is formed between the outer side wall thereof and the inner side wall of the second through hole, the third air channel is communicated with the second air channel and the second joint, the first valve core is movably connected with the third valve body, so that the first valve core can move in the second through hole along the axial center line direction of the third valve body, the second end of the first valve core is provided with a first blocking portion, and the inner side wall of the second through hole is correspondingly provided with a second blocking portion;

[0012] Wherein, the first valve core has a first position and a second position, and when the first valve core is in the first position, the first blocking portion and the second blocking portion are separated, so that the third airway remains unobstructed;

[0013] When the first valve core is in the second position, the first blocking portion and the second blocking portion conflict with each other, so that the third air passage is disconnected;

[0014] a first drive assembly, which is arranged in the valve body assembly and is in driving connection with the first valve core; when the third valve body is in a preset position, the first drive assembly places the first valve core in a first position to open the third air passage; when the third valve body is separated from the second valve body, the first drive assembly places the first valve core in a second position to disconnect the third air passage;

[0015] a second valve core, which is arranged in the first through hole and movably connected to the valve body assembly, so that the second valve core can move along the axial center line direction of the valve body assembly, a third blocking portion is arranged at the second end of the second valve core, and a fourth blocking portion is arranged on the inner side wall of the first through hole;

[0016] The second valve core has a third position and a fourth position. When the second valve core is in the third position, the third blocking portion and the fourth blocking portion are separated so that the second air passage remains unobstructed. When the second valve core is in the fourth position, the third blocking portion conflicts with the fourth blocking portion so that the second air passage is disconnected.

[0017] A second drive assembly is arranged in the valve body assembly and is in driving connection with the second valve core. When the third valve body is in a preset position, the second drive assembly places the second valve core in a third position to open the second air channel. When the third valve body is separated from the second valve body, the second drive assembly places the second valve core in a fourth position to disconnect the second air channel.

[0018] Furthermore, the first locking assembly comprises:

[0019] a first locking element, a first mounting hole being formed at the second end of the second locking element, the first locking element being arranged in the first mounting hole and being movably connected to the second valve body, a locking groove being correspondingly formed on the outer side wall of the third valve body, and the first locking element having a locking position and an unlocking position;

[0020] a first elastic element, two ends of which are respectively connected to the second valve body and the first locking element, and in a natural state, the first elastic element applies elastic force to the first locking element so that the first locking element has a tendency to move from an unlocking position to a locking position;

[0021] Wherein, the locking end of the first locking element and / or the side wall of the locking groove have a driving surface. When the pulling force on the third valve body exceeds a preset value, the third valve body can apply a force to the first locking element through the driving surface, so that the first locking element overcomes the elastic force of the first elastic element and moves from the locking position to the unlocking position.

[0022] Furthermore, the first mounting hole is a through hole, the second end of the second valve body is provided with a limiting ring for sealing the first mounting hole, the limiting ring is detachably connected to the second valve body, and the two ends of the first elastic element are respectively connected to the limiting ring and the first locking element.

[0023] Furthermore, the limiting ring is movably sleeved on the second end of the second valve body, and the side wall of the second end of the second valve body is provided with a limiting portion that cooperates with the first end of the limiting ring, and the end wall of the second end of the second valve body is threadedly connected with a first limiting element that cooperates with the second end of the limiting ring.

[0024] Furthermore, the first driving component comprises:

[0025] a second elastic element, two ends of which are respectively connected to the third valve body and the first valve core, and in a natural state, the second elastic element applies elastic force to the first valve core so that the first valve core has a tendency to move from the first position to the second position; and

[0026] A push rod, the second end of which is connected to the first valve core and the first end of which extends in a direction facing the first valve body, and the first end of the push rod can interfere with the valve body assembly, thereby applying a force to the first valve core to drive the first valve core to move from the second position to the first position.

[0027] Furthermore, a limit plate is provided at the second end of the second through hole, a vent hole is opened along the axial direction of the limit plate, the limit plate is detachably connected to the third valve body, and both ends of the second elastic element are respectively connected to the limit plate and the first valve core.

[0028] Further, the limiting plate is movably arranged in the second through hole, an elastic retaining ring is arranged at the second end of the limiting plate, and a limiting groove matched with the elastic retaining ring is correspondingly arranged on the inner side wall of the second through hole.

[0029] Furthermore, the second driving component comprises:

[0030] a third elastic element, a first end of which is connected to the first valve body or the second valve body, and a second end of which is connected to the second valve core, and in a natural state, the third elastic element applies elastic force to the second valve core so that the second valve core has a tendency to move from the third position to the fourth position;

[0031] A driving element, which is arranged at the first end of the third valve body and fixedly connected to the first end of the third valve body, and the second valve core is sleeved on the driving element and movably connected to the driving element;

[0032] A second limiting element, wherein a second mounting hole is provided on a side wall of the second valve core, the second mounting hole is a through hole, the second limiting element is movably arranged in the second mounting hole, a limiting groove is correspondingly provided on an inner side wall of the first valve body or the second valve body, and the second limiting element has a fifth position and a sixth position;

[0033] Wherein, when the second limiting element is in the fifth position, the first end of the second limiting element is inserted into the limiting groove, and the second end is in conflict with the outer side wall of the driving element or the third valve body;

[0034] When the second limiting element is in the sixth position, the first end of the second limiting element contacts the inner side wall of the first valve body or the second valve body, and the second end extends beyond the inner side wall of the second valve core;

[0035] Wherein, at least one of the first end of the second limiting element and the side wall of the limiting groove is provided with a first guiding inclined surface or a first guiding arc surface, so that the second valve core can drive the second limiting element from the fifth position to the sixth position through the first guiding inclined surface or the first guiding arc surface;

[0036] At least one of the second end of the second limiting element and the first end of the driving element is provided with a second guiding slope or a second guiding arc surface, so that the driving element can drive the second limiting element from the sixth position to the fifth position through the second guiding slope or the second guiding arc surface.

[0037] Beneficial effects of the present invention:

[0038] The breakaway valve provided by the present invention has a simple structure, a reasonable design, and is easy to disassemble, replace and repair. Moreover, after assembly, the first valve core and the second valve core cannot be moved any more, so the interior of the valve body can be bidirectionally conductive. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0040] Figure 1 A structural view of a breakaway valve provided in one embodiment of the present invention;

[0041] Figure 2 for Figure 1 An enlarged view of section A is shown;

[0042] Figure 3 for Figure 2 An enlarged view of section D is shown;

[0043] Figure 4 for Figure 1 An enlarged view of section C is shown;

[0044] Figure 5 for Figure 1 An enlarged view of section D is shown.

[0045] Reference numerals:

[0046] 110, first valve body; 111, first air channel; 120, second valve body; 121, first through hole; 122, fourth blocking portion; 123, first mounting hole; 130, third valve body; 131, second through hole; 132, second blocking portion; 133, air guide hole; 140, limiting ring; 150, first limiting element; 210, first locking element; 220, first elastic element; 230, locking groove; 300, first valve core; 310, first blocking portion; 3 20. Guide rod; 410. Second elastic element; 420. Push rod; 430. Limit plate; 440. Elastic retaining ring; 500. Second valve core; 510. Third blocking portion; 520. Second mounting hole; 610. Third elastic element; 620. Driving element; 630. Second limiting element; 640. Limiting groove; 710. First sealing ring; 720. Second sealing ring; 730. Third sealing ring; 740. Fourth sealing ring; 750. Fifth sealing ring. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0048] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct conflict, or that the first and second features are in indirect conflict through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] like Figure 1-5 As shown, the present invention provides a breakaway valve, comprising a valve body assembly, a first locking assembly, a first valve core 300, a first drive assembly, a second valve core 500 and a second drive assembly.

[0054] The valve body assembly includes a first valve body 110 , a second valve body 120 and a third valve body 130 .

[0055] The first valve body 110 is provided with a first air passage 111, and the first end of the first valve body 110 is fixedly connected to the first joint, for example, by bonding, welding, or threaded connection, and the first air passage 111 is in communication with the first joint.

[0056] In this embodiment, the first valve body 110 is threadedly connected to the main pipeline joint for easy disassembly and replacement. Specifically, the first end of the first valve body 110 is provided with an internal thread, and the first joint is correspondingly provided with an external thread.

[0057] In this embodiment, the first joint is a main line joint.

[0058] The second valve body 120 is provided with a first through hole 121 along its own axis, and the first end of the second valve body 120 is fixedly connected to the second end of the first valve body 110, for example, by bonding, welding, threaded connection, etc. In this embodiment, the second valve body 120 is threadedly connected to the first valve body 110 for easy disassembly and replacement. Specifically, the inner side wall of the first end of the first through hole 121 is provided with an internal thread, and the outer side wall of the second end of the first valve body 110 is correspondingly provided with an external thread.

[0059] The third valve body 130 has a second through hole 131 along its own axial direction, and the first end of the third valve body 130 is inserted into the first through hole 121. A second air passage is formed between the outer side wall of the third valve body 130 and the inner side wall of the first through hole 121, and the second air passage is connected to the first air passage 111.

[0060] The third valve body 130 is movably connected to the second valve body 120 so that the third valve body 130 can be pulled out from the first through hole 121. The second end of the third valve body 130 is fixedly connected to the second joint, for example, by welding, bonding, threaded connection, etc. In this embodiment, the first end of the third valve body 130 is threadedly connected to the second joint for easy disassembly and replacement. Specifically, the second end of the third valve body 130 is provided with an internal thread, and the second joint is correspondingly provided with an internal thread. And the second joint is connected to the second through hole 131.

[0061] In this embodiment, the second connector is a hose connector.

[0062] The first locking assembly is arranged on the second valve body 120 and the third valve body 130, and the first locking assembly is used to lock the third valve body 130 in a preset position, and when the pulling force applied to the third valve body 130 exceeds a preset value, the first locking assembly releases the lock on the third valve body 130 so that the third valve body 130 can be pulled out of the first through hole 121.

[0063] The first valve core 300 is inserted into the second through hole 131, and a third air passage is formed between the outer side wall of the first valve core 300 and the inner side wall of the second through hole 131. The third air passage is connected to the second air passage and the second joint. Specifically, the third air passage is connected to the second air passage through the air guide hole 133 opened on the side wall of the third valve body 130.

[0064] The first valve core 300 is movably connected to the third valve body 130 so that the first valve core 300 can move in the second through hole 131 along the axis of the third valve body 130. A first blocking portion 310 is disposed at the second end of the first valve core 300, and a second blocking portion 132 is correspondingly disposed on the inner side wall of the second through hole 131.

[0065] The first valve core 300 has a first position and a second position. When the first valve core 300 is in the first position, the first sealing portion 310 and the second sealing portion 132 are separated so that the third air channel remains unobstructed. When the first valve core 300 is in the second position, the first sealing portion 310 and the second sealing portion 132 conflict with each other so that the third air channel is disconnected.

[0066] The first drive assembly is disposed in the valve body assembly, and the first drive assembly is in transmission connection with the first valve core 300. When the third valve body 130 is in a preset position, the first drive assembly places the first valve core 300 in the first position to open the third air passage; when the third valve body 130 is separated from the second valve body 120, the first drive assembly places the first valve core 300 in the second position to disconnect the third air passage.

[0067] The second valve core 500 is disposed in the first through hole 121 and is movably connected to the valve body assembly so that the second valve core 500 can move along the axial centerline direction of the valve body assembly. The second end of the second valve core 500 (i.e., the end of the second valve core 500 facing the second joint) is provided with a third blocking portion 510, and the inner side wall of the first through hole 121 is provided with a fourth blocking portion 122. The second valve core 500 has a third position and a fourth position. When the second valve core 500 is in the third position, the third blocking portion 510 and the fourth blocking portion 122 are separated so that the second airway remains unobstructed. When the second valve core 500 is in the fourth position, the third blocking portion 510 conflicts with the fourth blocking portion 122 so that the second airway is disconnected.

[0068] The second drive assembly is disposed in the valve body assembly, and the second drive assembly is in transmission connection with the second valve core 500. When the third valve body 130 is in a preset position, the second drive assembly places the second valve core 500 in the third position to open the second air passage; when the third valve body 130 is separated from the second valve body 120, the second drive assembly places the second valve core 500 in the fourth position to disconnect the second air passage.

[0069] Specifically, under normal operation, the first locking assembly locks the third valve body 130 at a preset position, so that the gas can enter the first air channel 111, the second air channel and the third air channel from the first joint in sequence, and finally flow out from the second joint.

[0070] When the pulling force applied to the third valve body 130 exceeds a preset value, the first locking assembly releases the locking of the third valve body 130, and under the action of the pulling force, the third valve body 130 is pulled out of the first through hole 121 together with the first valve core 300. Under the action of the first driving assembly, the first driving assembly places the first valve core 300 in the second position, thereby disconnecting the third gas passage, thereby achieving the purpose of preventing the gas from flowing out of the gas-using end (for example, a car fueled by hydrogen). Similarly, under the action of the second driving assembly, the second driving assembly places the second valve core 500 in the fourth position, thereby disconnecting the second gas passage, thereby achieving the purpose of preventing the gas leakage at the gas filling end.

[0071] The breakaway valve provided by the present invention has a simple structure, reasonable design, and is easy to assemble and maintain. After assembly, the first valve core 300 and the second valve core 500 can no longer move, so the interior of the valve body can be bidirectionally conductive.

[0072] like Figure 1 , 4 As shown, the first locking assembly includes a first locking element 210 and a first elastic element 220 .

[0073] The second end of the second valve body 120 is provided with a first mounting hole 123, and the first locking element 210 is arranged in the first mounting hole 123 and is movably connected with the second valve body 120. The outer side wall of the third valve body 130 is correspondingly provided with a locking groove 230. The first locking element 210 has a locking position and an unlocking position. When the first locking element 210 is in the locking position, the locking end of the first locking element 210 is inserted into the locking groove 230, and when the first locking element 210 is in the unlocking position, the locking end of the first locking element 210 is located outside the locking groove 230.

[0074] Both ends of the first elastic element 220 are respectively connected to the second valve body 120 and the first locking element 210, and in a natural state, the first elastic element 220 applies elastic force to the first locking element 210 so that the first locking element 210 has a tendency to move from the unlocking position to the locking position.

[0075] Among them, the locking end of the first locking element 210 and / or the side wall of the locking groove 230 have a driving surface. When the pulling force on the third valve body 130 exceeds a preset value, the third valve body 130 can apply a force to the first locking element 210 through the driving surface, so that the first locking element 210 overcomes the elastic force of the first elastic element 220 and moves from the locked position to the unlocked position, thereby achieving the purpose of releasing the lock on the third valve body 130.

[0076] Specifically, the driving surface is an inclined surface or an arc surface. In this embodiment, the driving surface is an arc surface, for example, the first locking element 210 is a locking ball or the locking end of the first locking element 210 is hemispherical, or the cross section of the locking groove 230 is arc-shaped. Figure 1 , 4 As shown, in this embodiment, the first locking element 210 is a locking ball.

[0077] Optionally, the first mounting hole 123 is a through hole, and the second end of the second valve body 120 is sleeved with a limiting ring 140 for blocking the first mounting hole 123, and the limiting ring 140 is detachably connected to the second valve body 120. Both ends of the first elastic element 220 are connected to the limiting ring 140 and the first locking element 210 respectively.

[0078] During assembly, the first locking element 210 and the first elastic element 220 are sequentially placed into the first mounting hole 123 , and then the upper limit ring 140 is installed, thereby facilitating the disassembly and installation of the first locking element 210 and the first elastic element 220 .

[0079] Preferably, a plurality of first locking elements 210 and first elastic elements 220 are provided in one-to-one correspondence, so as to improve the stability and reliability of locking the third valve body 130 .

[0080] Specifically, the first elastic element 220 is any element that can apply elastic force to the first locking element 210, such as a spring, a rubber spring, a gas spring, a hydraulic spring, etc. Figure 1 , 4 As shown, in this embodiment, the first elastic element 220 is a spring.

[0081] like Figure 1 , 4 As shown, in this embodiment, the limiting ring 140 is movably sleeved on the second end of the second valve body 120, and the side wall of the second end of the second valve body 120 is provided with a limiting portion that matches the first end of the limiting ring 140, and the end wall of the second end of the second valve body 120 is threadedly connected with a first limiting element 150 that matches the second end of the limiting ring 140. Figure 1 , 4 As shown, the first limiting element 150 is a limiting bolt.

[0082] Preferably, a plurality of first limiting elements 150 are provided to improve the reliability and stability of limiting.

[0083] During assembly, the first locking element 210 and the first elastic element 220 are placed into the first mounting hole 123 in turn, then the limiting ring 140 is put on, and finally the first limiting element 150 is screwed on. The operation is simple and convenient for disassembling and installing the first locking element 210 and the first elastic element 220.

[0084] like Figure 1 , 5 As shown, the first driving assembly includes a second elastic element 410 and a push rod 420 .

[0085] The two ends of the second elastic element 410 are connected to the third valve body 130 and the first valve core 300 respectively, and in a natural state, the second elastic element 410 applies elastic force to the first valve core 300 so that the first valve core 300 has a tendency to move from the first position to the second position. The second end of the push rod 420 is connected to the first valve core 300, the first end extends in a direction facing the first valve body 110, and the first end of the push rod 420 can contact with the valve body assembly, thereby applying force to the first valve core 300 to drive the first valve core 300 to move from the second position to the first position. Specifically, in this embodiment, the push rod 420 can contact with the first valve body 110, thereby applying force to the first valve core 300 to drive the first valve core 300 to move from the second position to the first position.

[0086] Specifically, during the process of inserting the third valve body 130 into the first through hole 121, the valve body assembly applies a force to the first valve core 300 through the push rod 420, so that the first valve core 300 overcomes the elastic force of the second elastic element 410 and moves from the second position to the first position. When the third valve body 130 is separated from the second valve body 120 (i.e., when the third valve body 130 is pulled out), the second elastic element 410 applies a force to the first valve core 300, so that the first valve core 300 moves from the first position to the second position.

[0087] In this embodiment, the first driving assembly provided has a simple structure, reasonable design and convenient operation.

[0088] Specifically, the second elastic element 410 is any element that can apply elastic force to the first valve core 300, such as a spring, a rubber spring, a gas spring, a hydraulic spring, etc. Figure 1 , 5 As shown, in this embodiment, the second elastic element 410 is a spring.

[0089] like Figure 5 As shown, a limit plate 430 is disposed at the second end of the second through hole 131. The limit plate 430 has a vent hole along its axis, and the limit plate 430 is detachably connected to the third valve body 130. The two ends of the second elastic element 410 are respectively connected to the limit plate 430 and the first valve core 300.

[0090] During assembly, the first valve core 300 and the second elastic element 410 are sequentially installed into the second through hole 131, and the limit plate 430 is installed, so as to achieve the purpose of assembling the first valve core 300 and the second elastic element 410. The operation is simple and it is convenient to disassemble and install the first valve core 300 and the second elastic element 410.

[0091] like Figure 5 As shown, the limiting plate 430 is movably arranged in the second through hole 131, and an elastic retaining ring 440 is arranged at the second end (i.e., the end away from the first joint) of the limiting plate 430, and a limiting groove adapted to the elastic retaining ring 440 is correspondingly arranged on the inner side wall of the second through hole 131.

[0092] During assembly, the first valve core 300, the second elastic element 410 and the limit plate 430 are sequentially installed into the second through hole 131, and then the elastic retaining ring 440 is snapped into the limit groove. The operation is convenient and it is easy to disassemble and install the first valve core 300 and the second elastic element 410.

[0093] like Figure 5As shown, a guide hole is provided on the limit plate 430, and a guide rod 320 adapted to the guide hole is provided at the second end of the first valve core 300 (i.e., the end away from the first joint), so that the purpose of limiting and guiding the movement of the first valve core 300 is achieved through the cooperation between the guide hole and the guide rod 320.

[0094] like Figure 1 , 2 As shown, the second driving assembly includes a third elastic element 610 , a driving element 620 and a second limiting element 630 .

[0095] The first end of the third elastic element 610 is connected to the first valve body 110 or the second valve body 120, and the second end is connected to the second valve core 500. In the natural state, the third elastic element 610 applies elastic force to the second valve core 500, so that the second valve core 500 has a tendency to move from the third position to the fourth position. In this embodiment, the first end of the third elastic element 610 abuts against the first valve body 110, and the second end abuts against the second valve core 500.

[0096] The driving element 620 is disposed at the first end of the third valve body 130 and is fixedly connected to the first end of the third valve body 130, for example, by bonding, welding, threaded connection, etc. In this embodiment, the driving element 620 is threadedly connected to the third valve body 130 to facilitate the removal, installation, and replacement of the driving element 620. The second valve core 500 is sleeved on the driving element 620 and is movably connected to the driving element 620, so that the driving element 620 can be withdrawn from the second valve core 500.

[0097] The side wall of the second valve core 500 is provided with a second mounting hole 520, and the second mounting hole 520 is a through hole. The second limiting element 630 is movably arranged in the second mounting hole 520, and the inner side wall of the first valve body 110 or the second valve body 120 is correspondingly provided with a limiting groove 640. The second limiting element 630 has a fifth position and a sixth position. Among them, when the second limiting element 630 is in the fifth position, the first end of the second limiting element 630 is inserted into the limiting groove 640, and the second end is in conflict with the outer side wall of the driving element 620 or the third valve body 130. When the second limiting element 630 is in the sixth position, the first end of the second limiting element 630 is in conflict with the inner side wall of the first valve body 110 or the second valve body 120, and the second end extends beyond the inner side wall of the second valve core 500.

[0098] Among them, at least one of the first end of the second limiting element 630 and the side wall of the limiting groove 640 is provided with a first guide slope or a first guide arc surface, so that the second valve core 500 can drive the second limiting element 630 from the fifth position to the sixth position through the first guide slope or the first guide arc surface; at least one of the second end of the second limiting element 630 and the first end of the driving element 620 (that is, the end of the driving element 620 facing the first valve body 110) is provided with a second guide slope or a second guide arc surface, so that the driving element 620 can drive the second limiting element 630 from the sixth position to the fifth position through the second guide slope or the second guide arc surface.

[0099] Specifically, when in use, before the third valve body 130 is inserted into the second through hole 131 , the second valve core 500 is placed at the fourth position under the action of the third elastic element 610 , and at this time, the second limiting element 630 is at the sixth position.

[0100] In the process of inserting the second valve body 120 into the second through hole 131, firstly, since the second limiting element 630 is in the sixth position, under the cooperation of the second limiting element 630 and the driving element 620, the driving element 620 applies a force to the second valve core 500 through the second limiting element 630, thereby driving the second valve core 500 from the fourth position to the third position; when the second limiting element 630 corresponds to the limiting groove 640, the second valve core 500 moves to the third position, and at the same time, the driving element 620 applies a force to the second limiting element 630 through the second guide inclined surface and the guide arc surface, so that the second limiting element 630 moves from the sixth position to the fifth position; when the second limiting element 630 moves to the fifth position, the driving element 620 can no longer drive the second valve core 500 to move through the second limiting element 630, and at the same time, under the cooperation of the second limiting element 630 and the limiting groove 640, the third elastic element 610 can also not drive the second valve core 500 to move.

[0101] When the second valve body 120 and the driving element 620 are pulled out, the driving element 620 is separated from the second valve core 500, and under the action of the elastic force of the third elastic element 610, the third elastic element 610 can apply a force to the second limiting element 630 through the second valve core 500, and under the action of the first wire slope or arc surface, the second limiting element 630 is driven from the fifth position to the sixth position; when the second limiting element 630 moves to the sixth position, since the second limiting element 630 and the limiting groove 640 cannot cooperate with each other, the second valve core 500 is driven from the third position to the fourth position under the action of the third elastic element 610.

[0102] The second driving assembly provided in this embodiment has a simple structure and a reasonable design. After the second valve core 500 is driven to the third position, no force can be applied to the second valve core 500, so the driving is reliable and the positioning is accurate.

[0103] Preferably, a plurality of second limiting elements 630 are provided to improve the stability and reliability of driving and limiting.

[0104] In this embodiment, the second limiting element 630 is spherical.

[0105] Specifically, the third elastic element 610 is any element that can apply elastic force to the second valve core 500, such as a spring, a rubber spring, a gas spring, a hydraulic spring, etc. Figure 1 , 2 As shown, in this embodiment, the third elastic element 610 is a spring.

[0106] Of course, a first sealing ring 710 is disposed between the second valve body 120 and the first valve body 110 to prevent gas from leaking from the gap between the first valve body 110 and the second valve body 120. Specifically, the first sealing ring 710 is disposed between the second end of the first valve body 110 and the first end of the second valve body 120.

[0107] A second sealing ring 720 is disposed between the third valve body 130 and the second valve body 120 to prevent gas from leaking from the gap between the third valve body 130 and the second valve body 120. Specifically, the second sealing ring 720 is disposed between the inner side wall of the second end of the first through hole 121 (i.e., the end of the first through hole 121 away from the first valve body 110) and the outer side wall of the third valve body 130.

[0108] A third sealing ring 730 is disposed between the third valve body 130 and the first valve core 300 to prevent gas from leaking from the gap between the third valve body 130 and the first sealing ring 710. Specifically, the third sealing ring 730 is disposed between the inner side wall of the first end of the second through hole 131 (i.e., the end of the second through hole 131 facing the first valve body 110) and the push rod 420, and the third sealing ring 730 is located on the side of the driving element 620 away from the first valve body 110.

[0109] A fourth sealing ring 740 is disposed between the second valve core 500 and the first valve body 110 or the second valve body 120 to prevent gas from leaking from the gap between the first valve body 110 and the second valve core 500 or the gap between the second valve body 120 and the second valve core 500. In this embodiment, the fourth sealing ring 740 is disposed between the inner side wall of the first valve body 110 and the outer side wall of the second valve core 500.

[0110] A fifth sealing ring 750 is disposed between the second valve core 500 and the third valve body 130 to prevent gas from leaking from the gap between the second valve core 500 and the third valve body 130. In this embodiment, the fifth sealing ring 750 is disposed between the inner side wall of the second end of the second valve core 500 (i.e., the end of the second valve core 500 away from the first valve body 110) and the outer side wall of the third valve body 130.

[0111] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A breakaway valve, characterized in that: include: A valve body assembly, comprising: A first valve body (110), which is provided with a first air channel (111), a first end of which is fixedly connected to a first joint, and the first air channel (111) is in communication with the first joint; A second valve body (120) is provided with a first through hole (121) along its own axis, and a first end of the second valve body (110) is fixedly connected to the second end of the first valve body (110); and A third valve body (130) is provided with a second through hole (131) along its own axial centerline direction, a first end of the third valve body (130) is inserted into the first through hole (121), a second air passage is formed between the outer side wall of the third valve body and the inner side wall of the first through hole (121), the second air passage is communicated with the first air passage (111), the third valve body (130) is movably connected with the second valve body (120) so that the third valve body (130) can be pulled out of the first through hole (121), the second end of the third valve body (130) is fixedly connected with the second joint, and the second joint is communicated with the second through hole (131); a first locking assembly, which is arranged on the second valve body (120) and the third valve body (130), and is used to lock the third valve body (130) at a preset position, and when the pulling force applied to the third valve body (130) exceeds a preset value, the first locking assembly releases the lock on the third valve body (130), so that the third valve body (130) can be pulled out of the first through hole (121); a first valve core (300) which is inserted into the second through hole (131), a third air channel being formed between the outer side wall thereof and the inner side wall of the second through hole (131), the third air channel being in communication with the second air channel and the second joint, the first valve core (300) being movably connected to the third valve body (130) so that the first valve core (300) can move in the second through hole (131) along the axial center line direction of the third valve body (130), a first blocking portion (310) being provided at the second end of the first valve core (300), and a second blocking portion (132) being correspondingly provided on the inner side wall of the second through hole (131); The first valve core (300) has a first position and a second position, and when the first valve core (300) is in the first position, the first blocking portion (310) and the second blocking portion (132) are separated, so that the third airway remains unobstructed; When the first valve core (300) is in the second position, the first blocking portion (310) and the second blocking portion (132) conflict with each other, so that the third air passage is disconnected; a first drive assembly, which is arranged in the valve body assembly and is in driving connection with the first valve core (300); when the third valve body (130) is in a preset position, the first drive assembly places the first valve core (300) in a first position to open the third air passage; when the third valve body (130) is separated from the second valve body (120), the first drive assembly places the first valve core (300) in a second position to disconnect the third air passage; a second valve core (500), which is arranged in the first through hole (121) and is movably connected to the valve body assembly, so that the second valve core (500) can move along the axial centerline direction of the valve body assembly, a third blocking portion (510) is arranged at the second end of the second valve core (500), and a fourth blocking portion (122) is arranged on the inner side wall of the first through hole (121); The second valve core (500) has a third position and a fourth position. When the second valve core (500) is in the third position, the third blocking portion (510) and the fourth blocking portion (122) are separated so that the second air passage remains unobstructed. When the second valve core (500) is in the fourth position, the third blocking portion (510) and the fourth blocking portion (122) are in conflict so that the second air passage is disconnected. A second drive assembly is arranged in the valve body assembly and is in transmission connection with the second valve core (500). When the third valve body (130) is in a preset position, the second drive assembly places the second valve core (500) in a third position to open the second air channel; when the third valve body (130) is separated from the second valve body (120), the second drive assembly places the second valve core (500) in a fourth position to disconnect the second air channel.

2. The breakaway valve according to claim 1, characterized in that: The first locking assembly comprises: a first locking element (210), a first mounting hole (123) being formed at a second end of the second locking element, the first locking element (210) being arranged in the first mounting hole (123) and being movably connected to the second valve body (120), a locking groove (230) being correspondingly formed on an outer side wall of the third valve body (130), and the first locking element (210) having a locking position and an unlocking position; a first elastic element (220), two ends of which are respectively connected to the second valve body (120) and the first locking element (210), and in a natural state, the first elastic element (220) applies elastic force to the first locking element (210), so that the first locking element (210) has a tendency to move from an unlocking position to a locking position; The locking end of the first locking element (210) and / or the side wall of the locking groove (230) have a driving surface, and when the pulling force on the third valve body (130) exceeds a preset value, the third valve body (130) can apply a force to the first locking element (210) through the driving surface, so that the first locking element (210) overcomes the elastic force of the first elastic element (220) and moves from the locking position to the unlocking position.

3. The breakaway valve according to claim 2, characterized in that: The first mounting hole (123) is a through hole, and the second end of the second valve body (120) is sleeved with a limiting ring (140) for sealing the first mounting hole (123), and the limiting ring (140) is detachably connected to the second valve body (120), and the two ends of the first elastic element (220) are respectively connected to the limiting ring (140) and the first locking element (210).

4. The breakaway valve according to claim 3, characterized in that: The limiting ring (140) is movably mounted on the second end of the second valve body (120), and the side wall of the second end of the second valve body (120) is provided with a limiting portion that matches with the first end of the limiting ring (140), and the end wall of the second end of the second valve body (120) is threadedly connected with a first limiting element (150) that matches with the second end of the limiting ring (140).

5. The breakaway valve according to any one of claims 1 to 4, characterized in that: The first driving assembly comprises: a second elastic element (410), two ends of which are respectively connected to the third valve body (130) and the first valve core (300), and in a natural state, the second elastic element (410) applies elastic force to the first valve core (300), so that the first valve core (300) has a tendency to move from the first position to the second position; and A push rod (420), the second end of which is connected to the first valve core (300) and the first end of which extends in a direction facing the first valve body (110), and the first end of the push rod (420) can interfere with the valve body assembly, thereby applying a force to the first valve core (300) to drive the first valve core (300) to move from the second position to the first position.

6. The breakaway valve according to claim 5, characterized in that: A limiting plate (430) is provided at the second end of the second through hole (131), and a vent hole is provided on the limiting plate (430) along its axial centerline direction. The limiting plate (430) is detachably connected to the third valve body (130), and the two ends of the second elastic element (410) are respectively connected to the limiting plate (430) and the first valve core (300).

7. The breakaway valve according to claim 6, characterized in that: The limiting plate (430) is movably arranged in the second through hole (131), an elastic retaining ring (440) is arranged at the second end of the limiting plate (430), and an inner side wall of the second through hole (131) is correspondingly provided with a limiting groove adapted to the elastic retaining ring (440).

8. A breakaway valve according to claim 1, 2, 3, 4, 6 or 7, characterized in that: The second driving assembly comprises: a third elastic element (610), a first end of which is connected to the first valve body (110) or the second valve body (120), and a second end of which is connected to the second valve core (500), and in a natural state, the third elastic element (610) applies elastic force to the second valve core (500), so that the second valve core (500) has a tendency to move from the third position to the fourth position; a driving element (620), which is arranged at the first end of the third valve body (130) and fixedly connected to the first end of the third valve body (130), and the second valve core (500) is sleeved on the driving element (620) and movably connected to the driving element (620); a second limiting element (630), wherein a second mounting hole (520) is provided on a side wall of the second valve core (500), the second mounting hole (520) is a through hole, the second limiting element (630) is movably arranged in the second mounting hole (520), a limiting groove (640) is correspondingly provided on an inner side wall of the first valve body (110) or the second valve body (120), and the second limiting element (630) has a fifth position and a sixth position; Wherein, when the second limiting element (630) is in the fifth position, the first end of the second limiting element (630) is inserted into the limiting groove (640), and the second end is in contact with the outer side wall of the driving element (620) or the third valve body (130); When the second limiting element (630) is in the sixth position, the first end of the second limiting element (630) contacts the inner side wall of the first valve body (110) or the second valve body (120), and the second end extends beyond the inner side wall of the second valve core (500); Wherein, at least one of the first end of the second limiting element (630) and the side wall of the limiting groove (640) is provided with a first guiding inclined surface or a first guiding arc surface, so that the second valve core (500) can drive the second limiting element (630) from the fifth position to the sixth position through the first guiding inclined surface or the first guiding arc surface; At least one of the second end of the second limiting element (630) and the first end of the driving element (620) is provided with a second guiding inclined surface or a second guiding arc surface, so that the driving element (620) can drive the second limiting element (630) from the sixth position to the fifth position through the second guiding inclined surface or the second guiding arc surface.

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