A bidirectional quick-insertion stop valve female connector and a bidirectional quick-insertion stop valve

Abstract

This utility model discloses a bidirectional quick-connect stop valve female connector and a bidirectional quick-connect stop valve. The female connector includes a female end shell, a female end valve core, a female end piston, and a female end spring. The female end shell has a female end channel for liquid flow. The female end shell has a valve core positioning groove in the female end channel. The two ends of the female end valve core are an assembly end and a sealing end, respectively. The assembly end has a boss and is assembled in the valve core positioning groove. The female end piston slides in the female end channel, and the inner wall of the female end piston is sealed with the sealing end. The outer wall of the female end piston is sealed with the female end channel. The female end spring is located between the boss and the female end piston. During the reset process of the female end spring, the female end spring acts on the assembly end of the female end valve core to counteract the effect of the female end piston on the sealing end when the female end spring releases its elastic potential energy to push the female end piston. This solves the problem of the female end valve core loosening due to the repeated movement of the female end piston.

Description

Technical Field

[0001] This utility model relates to the field of bidirectional shut-off valve technology, and in particular to a bidirectional quick-connect shut-off valve. Background Technology

[0002] In current bidirectional shut-off valve designs, especially those used in connection devices for temperature control systems of new energy vehicle batteries, one end of the piston spring of the female connector abuts against the piston, while the other end contacts a stepped surface on the inner wall of the female connector housing. This structure allows the piston spring to push the piston back to its original position when the male and female connectors separate, ensuring the valve closes quickly and effectively preventing media leakage.

[0003] However, with the rise of battery swapping services for new energy vehicles, higher requirements have been placed on the bidirectional shut-off valves used to connect to the battery temperature control system, namely, the need for frequent disassembly and reinstallation. In traditional female connectors, during the separation of the male and female connectors, the valve core and female housing are typically fixed with an interference fit in current manufacturing processes. The piston spring pushes the piston towards the valve core. Because the piston needs to seal with the valve core's sealing end, it exerts a force away from the valve core's installation direction during this sealing contact. Therefore, during frequent disassembly and reassembly, the connection between the valve core and the female housing gradually loosens. This not only affects the overall stability of the equipment but may also lead to liquid leakage under pressure during disassembly. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides a bidirectional quick-connect stop valve female connector and a bidirectional quick-connect stop valve, which can solve the problem of valve core loosening when the female connector is frequently replaced by new energy batteries.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A bidirectional quick-connect shut-off valve female connector, comprising:

[0007] The female end housing has a female end channel for liquid to flow through, and the female end housing has a valve core positioning groove in the female end channel;

[0008] The female valve core has an assembly end and a sealing end at its two ends, respectively. The assembly end is provided with a boss and is assembled in the valve core positioning groove.

[0009] A female end piston, which is slidably disposed within the female end channel, and the inner wall of the female end piston is in sealing fit with the sealing end, and the outer wall of the female end piston is in sealing fit with the female end channel;

[0010] A female end spring is disposed between the boss and the female end piston to keep the female end piston moving away from the boss.

[0011] Furthermore, the female end housing includes a female end connector housing and a female end plug-in housing. The female end connector housing has a first plug-in structure, and the female end plug-in housing has a second plug-in structure. One of the first plug-in structure and the second plug-in structure is a protrusion, and the other is a slot. The protrusion is inserted into the slot and is welded to the slot.

[0012] Furthermore, the female end housing is provided with a locking assembly, which includes a lock and a locking spring. The lock is annular, and the two opposite ends of the lock are respectively provided with a pressing part and a locking part. The lock is sleeved on the female end housing. The female end housing is provided with a clearance hole for the locking part to move into the female end channel. The locking part is correspondingly provided with the clearance hole. The locking spring is provided between the pressing part and the female end housing.

[0013] Furthermore, the female end shell is provided with a groove, and the pressing part is located in the groove.

[0014] Furthermore, a positioning pin is provided in the sink, and one end of the locking spring is sleeved on the positioning pin.

[0015] Furthermore, the clearance hole extends from the female end shell toward the pressing part to the female end shell away from the pressing part. The clearance hole is provided with a first limiting step, and the latch is provided with a second limiting step that cooperates with the first limiting step to limit the maximum distance the latch moves toward the pressing part.

[0016] Furthermore, a first sealing element is provided between the sealing end and the inner wall of the female piston.

[0017] Furthermore, a second sealing element is provided between the outer wall of the female piston and the inner wall of the female housing.

[0018] This utility model also provides a bidirectional quick-connect shut-off valve, comprising:

[0019] The aforementioned bidirectional quick-connect shut-off valve female connector;

[0020] The male connector includes a male end housing, a male end piston, and a male end spring. The male end housing has a male end channel for liquid to flow through. The male end piston is slidably disposed in the male end channel. The male end housing is provided with a limiting part in the male end channel. One end of the male end spring abuts against the male end piston, and the other end abuts against the limiting part.

[0021] Furthermore, the male end housing is provided with a limiting groove corresponding to the snap-fit ​​portion. When the male end housing is inserted into the female end housing, the snap-fit ​​portion snaps into the limiting groove.

[0022] In summary, the bidirectional quick-connect shut-off valve provided by this utility model has the following technical effects:

[0023] By abutting one end of the female end spring against the boss at the valve core assembly end and the other end against the female end piston, the female end spring also acts on the assembly end of the female end valve core during the female end spring's reset process. This is used to counteract the effect of the female end piston on the sealing end when the female end spring releases its elastic potential energy to push the female end piston, thereby solving the problem of the female end valve core becoming loose due to the repeated movement of the female end piston. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the female connector of this utility model;

[0025] Figure 2 This is an exploded structural diagram of the female connector of this utility model;

[0026] Figure 3 This is a cross-sectional structural diagram of the female connector of this utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the female connector locking assembly of this utility model.

[0028] Figure 5 This is a three-dimensional structural diagram of the bidirectional quick-connect shut-off valve of this utility model;

[0029] Figure 6 This is a schematic diagram of the exploded structure of the male connector of this utility model;

[0030] Figure 7 This is a cross-sectional structural diagram of the male connector of this utility model;

[0031] Figure 8 This is a cross-sectional structural diagram of the bidirectional quick-connect shut-off valve of this utility model in use.

[0032] The meanings of the reference numerals in the attached drawings are as follows: 1. Female connector; 11. Female end housing; 111. Female end channel; 112. Valve core positioning groove; 113. Female end connector housing; 1131. First insertion structure; 114. Female end insertion housing; 1141. Second insertion structure; 115. Clearance hole; 1151. First limiting step; 116. Countersunk groove; 117. Positioning pin; 12. Female end valve core; 121. Assembly end; 1211. 1. Boss; 122. Sealing end; 123. First seal; 13. Female piston; 131. Second seal; 14. Female spring; 151. Lock; 1511. Pressing part; 1512. Snap-fit ​​part; 1513. Second limiting step; 152. Locking spring; 2. Male connector; 21. Male housing; 211. Male channel; 212. Limiting part; 213. Limiting groove; 22. Male piston; 23. Male spring. Detailed Implementation

[0033] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0034] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] See Figures 1-8This utility model discloses a bidirectional quick-connect shut-off valve female connector, including a female end housing 11, a female end valve core 12, a female end piston 13, and a female end spring 14. The female end housing 11 has a female end channel 111 for liquid flow, and a valve core positioning groove 112 within the female end channel 111. The two ends of the female end valve core 12 are an assembly end 121 and a sealing end 122, respectively. The assembly end 121 has a boss 1211 and is assembled in the valve core positioning groove 112. The female end piston 13 slides within the female end channel 111, and its inner wall and outer wall are sealed together. The female end spring 14 is positioned between the boss 1211 and the female end piston 13 to maintain the female end piston 13 in a direction away from the boss 1211.

[0038] Specifically, the female end housing 11 has a through female end channel 111 for liquid flow. A valve core positioning groove 112 is located within the female end channel 111. The valve core positioning groove 112 matches the shape of the boss 1211 on the assembly end 121 and is used to embed into the boss 1211. The valve core positioning groove 112 and the boss 1211 can also be interference-fitted. The two ends of the female end valve core 12 are the assembly end 121 and the sealing end 122, respectively. The assembly end 121 of the female end valve core 12 has a boss 1211, the outer diameter of which is slightly larger than the inlet diameter of the valve core positioning groove 112 to achieve an interference fit. The sealing end 122 is used to contact the inner wall of the female end piston 13. The female end piston 13 slides within the female end channel 111, its inner wall sealingly engaging with the valve core sealing end 122, and its outer wall sealingly engaging with the inner wall of the female end channel 111 to achieve a seal. One end of the female end spring 14 abuts against the boss 1211 of the valve core assembly end 121, and the other end abuts against the female end piston 13. The axis of the female end spring 14 is in the same direction of movement as the female end piston 13. The female end spring 14 applies a reverse force to the valve core assembly end 121 through the boss 1211, which forms a torque balance with the axial force when the female end piston 13 is reset, completely offsetting the impact of the female end piston 13 on the sealing end 122 and preventing the female end valve core 12 from loosening.

[0039] The working principle of the above structure:

[0040] See Figure 3 As shown, when the female connector 1 is in the initial state, the outer wall of the female end piston 13 is sealed to the female end housing 11, and the inner wall of the female end piston 13 is sealed to the sealing end 122 of the female end valve core 12, thereby achieving the closure of the female end channel 111. The medium introduced by the female end connector housing 113 is affected by the closure of the female end channel 111, thus achieving the effect of preventing the medium from leaking out.

[0041] It should be noted that the assembly section 121 of the female valve core 12 has a hollow structure so that the medium in the female connector can pass through the female valve core 12.

[0042] See Figure 2 and Figure 3 As shown, in some embodiments, the female end housing 11 includes a female end connector housing 113 and a female end plug-in housing 114. The female end connector housing 113 has a first plug-in structure 1131, and the female end plug-in housing 114 has a second plug-in structure 1141. One of the first plug-in structure 1131 and the second plug-in structure 1141 is a protrusion, and the other is a slot. The protrusion is inserted into the slot and is welded to the slot.

[0043] Specifically, the female end housing 11 includes a female end connector housing 113 and a female end plug-in housing 114. The female end connector housing 113 is mainly used for external pipeline connection, introducing external media into the female end connector 1. The female end plug-in housing 114 is mainly used for connection with the male end connector 2. Both the female end connector housing 113 and the female end plug-in housing 114 have internal channels, and the combination of these channels constitutes the female end channel 111. The female end connector housing 113 has a first plug-in structure 1131, and the female end plug-in housing 114 has a second plug-in structure 1141. Of the first plug-in structure 1131 and the second plug-in structure 1141, one is a protrusion and the other is a slot. For example, the first plug-in structure 1131 of the female end connector housing 113 is a slot, and the second plug-in structure 1141 of the female end plug-in housing 114 is a protrusion. The protrusion is inserted into the slot to achieve connection. The protrusion and the slot are connected by welding to ensure structural stability and sealing.

[0044] Furthermore, in order to further improve the sealing performance of the slot and bump connection, the heights of the slot walls on both sides are different, thereby increasing the escape path of gas or liquid and thus improving the airtightness of the slot and bump connection.

[0045] See Figure 1-4 As shown, in some embodiments, the female end housing 11 is provided with a locking assembly, which includes a locking buckle 151 and a locking spring 152. The locking buckle 151 is annular, and the two opposite ends of the locking buckle 151 are respectively provided with a pressing part 1511 and a snap-fit ​​part 1512. The locking buckle 151 is sleeved on the female end housing 11. The female end housing 11 is provided with a clearance hole 115 for the snap-fit ​​part 1512 to move into the female end channel 111. The snap-fit ​​part 1512 is correspondingly provided with the clearance hole 115. The locking spring 152 is provided between the pressing part 1511 and the female end housing 11.

[0046] Specifically, the female end housing 11 is provided with a locking assembly, including a locking buckle 151 and a locking spring 152. The locking buckle 151 has a ring structure, with a pressing part 1511 and a locking part 1512 respectively at its opposite ends. The locking buckle 151 is fitted onto the outer wall of the female end housing 11, and the locking buckle 151 is reset with the assistance of the locking spring 152. The female end housing 11 is provided with a clearance hole 115 at the position corresponding to the locking part 1512. The clearance hole 115 penetrates the outer wall of the female end housing 11 and extends into the female end channel 111. The locking part 1512 can slide along the clearance hole 115 and move from the outside of the female end housing 11 to the female end channel 111. The locking part 1512 matches the position of the clearance hole 115. When the male connector 2 is inserted into the female end housing 11, the locking part 1512 can enter the clearance hole 115 and lock into the limiting groove 213 of the male connector 2, thereby locking and fixing the male and female connectors 1. A locking spring 152 is disposed between the pressing part 1511 and the female end housing 11. One end of the locking spring 152 abuts against the pressing part 1511, and the other end abuts against the inner wall of the female end housing 11, providing a reset structure basis for the lock 151.

[0047] The working principle is as follows: When the user presses the pressing part 1511, the latch 151 overcomes the elastic force of the latch spring 152 and compresses inward, and the snap-fit ​​part 1512 exits from the clearance hole 115, releasing the snap-fit ​​state of the male connector 2 and the female connector 1, making it easy to disassemble.

[0048] After the pressing part 1511 is released, the locking spring 152 pushes the locking buckle 151 to reset, and the snap-fit ​​part 1512 extends out of the clearance hole 115 again, completing the automatic snap-fit ​​between the male connector 2 and the female connector 1.

[0049] See Figure 1 and Figure 2 As shown, in some embodiments, the female end housing 11 is provided with a recess 116, and the pressing part 1511 is located in the recess 116.

[0050] Specifically, the outer wall of the female end housing 11 is provided with a recess 116, which is an annular groove surrounding the pressing part 1511 of the locking assembly. The recess 116 hides the pressing part 1511 of the locking 151 inside the outer wall of the female end housing 11, avoiding accidental contact and reducing the risk of wear on the locking assembly.

[0051] See Figures 2-4 As shown, in some embodiments, a positioning pin 117 is provided in the sink 116, and one end of the locking spring 152 is sleeved on the positioning pin 117.

[0052] Specifically, a positioning pin 117 is provided in the sink 116. The positioning pin 117 serves as the installation reference for the locking spring 152. One end of the locking spring 152 is sleeved on the positioning pin 117, and the other end abuts against the pressing part 1511 to prevent the locking spring 152 from shifting or rotating during installation or use, and to ensure that the elastic force of the locking spring 152 is applied evenly along the axial direction.

[0053] See Figure 2 and Figure 4 As shown, in some embodiments, the clearance hole 115 extends from one end of the female end housing 11 toward the pressing part 1511 to the other end of the female end housing 11 away from the pressing part 1511. The clearance hole 115 is provided with a first limiting step 1151, and the latch 151 is provided with a second limiting step 1513 that cooperates with the first limiting step 1151 to limit the maximum distance of movement of the latch 151 toward the pressing part 1511.

[0054] Specifically, the clearance hole 115 extends from one end of the female end housing 11 toward the pressing part 1511 to the other end of the female end housing 11 away from the pressing part 1511. The clearance hole 115 penetrates the outer wall of the female end housing 11 and extends into the female end channel 111, providing sliding space for the snap-fit ​​part 1512 of the latch 151 and facilitating the installation of the latch 151. A first limiting step 1151 is provided in the clearance hole 115 to cooperate with the second limiting step 1513 of the latch 151, limiting the range of movement of the latch 151 and preventing the latch 151 from coming out of the clearance hole 115.

[0055] See Figure 3 As shown, in some embodiments, a first seal 123 is provided between the sealing end 122 and the inner wall of the female end piston 13.

[0056] Specifically, a first sealing element 123 is provided between the sealing end 122 of the female valve core 12 and the inner wall of the female piston 13. Optionally, the first sealing element 123 can be a sealing ring, and a sealing groove for assembling the first sealing element 123 is provided on the outer wall of the sealing end 122. The sealing ring is assembled into the sealing groove, thereby achieving a sealed connection between the inner wall of the female piston 13 and the sealing end 122 in the initial state, preventing the medium from flowing out.

[0057] See Figure 3 As shown, in some embodiments, a second seal 131 is provided between the outer wall of the female piston 13 and the inner wall of the female housing 11.

[0058] Specifically, a second sealing element 131 is provided between the outer wall of the female piston 13 and the inner wall of the female housing 11. Optionally, the second sealing element 131 is a sealing ring, and a sealing groove for assembling the second sealing element 131 is provided on the outer wall of the female piston 13. The sealing ring is assembled into the sealing groove, thereby achieving a sealed connection between the outer wall of the female piston 13 and the female housing 11 in the initial state, preventing the medium from flowing out.

[0059] See Figures 1-8 As shown, this utility model also provides a bidirectional quick-connect stop valve, including a male connector 2 and the aforementioned bidirectional quick-connect stop valve female connector. The male connector 2 includes a male end housing 21, a male end piston 22, and a male end spring 23. The male end housing 21 has a male end channel 211 for liquid to flow through. The male end piston 22 is slidably disposed in the male end channel 211. The male end housing 21 is provided with a limiting part 212 in the male end channel 211. One end of the male end spring 23 abuts against the male end piston 22, and the other end abuts against the limiting part 212.

[0060] Specifically, the male connector 2 includes a male end housing 21, inside which is a male end channel 211 for liquid flow. A male end piston 22 slides within the male end channel 211, its outer wall sealingly engaging with the inner wall of the channel 211 to achieve liquid isolation. A male end spring 23 is positioned between the male end piston 22 and the limiting part 212, with one end abutting against the male end piston 22 and the other end abutting against the limiting part 212. The preload of the male end spring 23 is always directed away from the limiting part 212.

[0061] It should be noted that when the male connector 2 is in the initial state, the male piston 22 is sealed to the male housing 21. The part of the male piston 22 away from the sealing with the male housing 21 has a hollow structure so that the medium can freely pass through the part of the male piston 22 that is not sealed with the male housing 21. Thus, when the male piston 22 is unsealed from the male housing 21, the medium can flow freely in the male channel 211 without being affected by the male piston 22.

[0062] See Figure 7 As shown, when the male connector 2 is in the initial state, the male piston 22 is sealed to the male housing 21, so that the male connector 2 is in the state of closing the male channel 211.

[0063] See Figure 8As shown, when the female connector 1 and male connector 2 are connected, the male connector 2 is inserted into the female end insertion housing 114. The male end housing 21 pushes the female end piston 13 towards the female end connector housing 113, thereby releasing the seal between the female end piston 13 and the female end housing 11, and also releasing the seal between the female end piston 13 and the sealing end 122. In other words, the female connector 1 is in the open state at this time. Correspondingly, the female end valve core 12 abuts against the male end piston 22, thereby releasing the seal between the male end piston 22 and the male end housing 21. Thus, the male connector 2 is in the open state at this time. The simultaneous opening of the female connector 1 and male connector 2 through the insertion of the female connector 1 and male connector 2 allows the medium to flow through both connectors.

[0064] See Figure 7 and Figure 8 As shown, in some embodiments, the male end housing 21 is provided with a limiting groove 213 corresponding to the snap-fit ​​part 1512. When the male end housing 21 is inserted into the female end housing 11, the snap-fit ​​part 1512 is snapped into the limiting groove 213.

[0065] Specifically, the outer wall of the male end housing 21 is provided with a limiting groove 213 to facilitate the locking of the male end housing 21 with the locking assembly, thereby achieving a stable connection between the male connector 2 and the female connector 1.

[0066] Optionally, the limiting groove 213 is an annular groove extending axially along the male end housing 21 and surrounding the outer side of the insertion area between the male end housing 21 and the female end housing 11. The depth and width of the limiting groove 213 match the dimensions of the snap-fit ​​portion 1512 of the female end housing 11 locking assembly, ensuring that the snap-fit ​​portion 1512 can be fully embedded in the limiting groove 213. The cooperation between the limiting groove 213 and the snap-fit ​​portion 1512 achieves mechanical locking of the male and female connectors 1, preventing accidental separation due to vibration or external force.

[0067] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A bidirectional quick-connect shut-off valve female connector, characterized in that, include: The female end housing (11) is provided with a female end channel (111) for liquid to flow through, and the female end housing (11) is provided with a valve core positioning groove (112) in the female end channel (111); The female valve core (12) has an assembly end (121) and a sealing end (122) at its two ends. The assembly end (121) is provided with a boss (1211) and is assembled in the valve core positioning groove (112). The female end piston (13) is slidably disposed in the female end channel (111), and the inner wall of the female end piston (13) is sealed to the sealing end (122), and the outer wall of the female end piston (13) is sealed to the female end channel (111). A female end spring (14) is provided between the boss (1211) and the female end piston (13) so that the female end piston (13) maintains a tendency to move away from the boss (1211).

2. A bidirectional quick disconnect valve union according to claim 1, wherein, The female end housing (11) includes a female end connector housing (113) and a female end plug-in housing (114). The female end connector housing (113) has a first plug-in structure (1131), and the female end plug-in housing (114) has a second plug-in structure (1141). One of the first plug-in structure (1131) and the second plug-in structure (1141) is a protrusion, and the other is a slot. The protrusion is inserted into the slot and is welded to the slot.

3. A bidirectional quick disconnect valve union according to claim 1, wherein, The female end shell (11) is provided with a locking assembly, which includes a lock (151) and a locking spring (152). The lock (151) is annular, and the two opposite ends of the lock (151) are respectively provided with a pressing part (1511) and a snap-fit ​​part (1512). The lock (151) is sleeved on the female end shell (11). The female end shell (11) is provided with a clearance hole (115) for the snap-fit ​​part (1512) to move into the female end channel (111). The snap-fit ​​part (1512) is correspondingly provided with the clearance hole (115). The locking spring (152) is provided between the pressing part (1511) and the female end shell (11).

4. A bidirectional quick disconnect valve union according to claim 3, wherein, The female end shell (11) is provided with a groove (116), and the pressing part (1511) is located in the groove (116).

5. A bidirectional quick disconnect valve union according to claim 4, wherein, The sink (116) is provided with a positioning pin (117), and one end of the locking spring (152) is sleeved on the positioning pin (117).

6. A bidirectional quick disconnect valve union according to claim 3, wherein, The clearance hole (115) extends from the female end shell (11) toward the pressing part (1511) to the female end shell (11) away from the pressing part (1511). The clearance hole (115) is provided with a first limiting step (1151), and the latch (151) is provided with a second limiting step (1513) that cooperates with the first limiting step (1151) to limit the maximum distance of movement of the latch (151) toward the pressing part (1511).

7. A bidirectional quick disconnect valve union according to any one of claims 1-6, characterized in that, A first sealing element (123) is provided between the sealing end (122) and the inner wall of the female end piston (13).

8. A bidirectional quick disconnect valve union according to any one of claims 1-6, characterized in that, A second seal (131) is provided between the outer wall of the female end piston (13) and the inner wall of the female end outer shell (11).

9. A bidirectional quick disconnect stop valve characterized by, include: The bidirectional quick-connect shut-off valve female connector according to any one of claims 1-8; The male connector (2) includes a male end housing (21), a male end piston (22), and a male end spring (23). The male end housing (21) has a male end channel (211) through which liquid flows. The male end piston (22) is slidably disposed in the male end channel (211). The male end housing (21) is provided with a limiting part (212) in the male end channel (211). One end of the male end spring (23) abuts against the male end piston (22), and the other end abuts against the limiting part (212).

10. A bidirectional quick-connect shut-off valve according to claim 9, characterized in that, The female end shell (11) is provided with a locking assembly, which includes a lock (151) and a locking spring (152). The lock (151) is annular, and the two opposite ends of the lock (151) are respectively provided with a pressing part (1511) and a snap-fit ​​part (1512). The lock (151) is sleeved on the female end shell (11). The female end shell (11) is provided with a clearance hole (115) for the snap-fit ​​part (1512) to move into the female end channel (111). The snap-fit ​​part (1512) is correspondingly provided with the clearance hole (115). The locking spring (152) is provided between the pressing part (1511) and the female end shell (11). The male end shell (21) is provided with a limiting groove (213) corresponding to the snap-fit ​​part (1512). When the male end shell (21) is inserted into the female end shell (11), the snap-fit ​​part (1512) is snapped into the limiting groove (213).

Images