An anti-overflow bidirectional check valve liquid cooling pipeline connection assembly

Abstract

This utility model provides a liquid cooling pipeline connection assembly for an anti-overflow bidirectional check valve, including a button with a pair of elastic arms. Each elastic arm has a locking wedge for locking the locking protrusion ring. The lower end of each elastic arm has a sliding expansion slope. The handle is welded and fixed with a housing sleeved on the outside of the fixed pipe. The housing has a front wall and a rear wall on both sides of the elastic arm, and an upper connecting part and a lower connecting part connecting the front wall and the rear wall between the pair of elastic arms. The lower connecting part has a supporting slope that cooperates with the sliding expansion slope.

Description

Technical Field

[0001] This utility model relates to the field of fluid shut-off valves, specifically an anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly. Background Technology

[0002] A two-way shut-off valve is used to connect and establish fluid communication between two fluid lines, and has both bidirectional inlet and outlet and bidirectional shut-off functions. Two-way shut-off valves have wide applications in the automotive field, such as in liquid and / or steam lines in vehicles, and in the thermal management systems of new energy vehicles / autonomous vehicles.

[0003] A two-way shut-off valve typically includes a female connector and a male connector, each connected to a fluid pipeline. The male connector can be inserted into the female connector to establish fluid communication between the fluid pipelines. Both ends of the female and male connectors are connected to a housing that can seal the connection to prevent fluid from flowing out of the fluid pipeline through the female and male connectors when the connection is broken.

[0004] Please see Figure 1-3CN218564695U. discloses a connector assembly (10) including a first connector (100) and a second connector (200) for connection with the first connector (100). The first connector (100) includes a first connector body (102) and a locking sleeve (104). The first connector body (102) defines an axial direction. The locking sleeve (104) is sleeved on the first connector body (102) and rotatably held on the first connector body (102). The locking sleeve (104) includes a locking groove (106) and a guide protrusion (108). The locking groove (106) is disposed on the cylindrical wall (110) of the locking sleeve (104), and the guide protrusion (108) is disposed on the axial end (132) of the cylindrical wall (110) and adjacent to the locking groove (106). The second connector (200) includes... The device includes a second connector body (202) configured to be inserted between the locking sleeve (104) and the first connector body (102) in the axial direction, and the second connector body (202) includes a locking protrusion (204) disposed on its outer periphery; wherein the locking sleeve (104) is configured such that during the insertion of the second connector body (202) between the locking sleeve (104) and the first connector body (102) in the axial direction, the locking sleeve (104) is rotatable in response to the locking protrusion (204) pressing the guide protrusion (108) to allow the locking protrusion (204) to move along the guide protrusion (108) into the locking groove (106); wherein the locking protrusion (204) is capable of engaging the locking groove (106) to prevent the second connector body (202) from disengaging from the locking sleeve (104).

[0005] Valve unit 118 may include valve core 120 and elastic member 122. Valve core 120 is movable along a first axial direction A1 between a first closed position and a first open position. Elastic member 122 may bias valve core 120 toward the first closed position. When valve core 120 is in the first closed position, it blocks port 116 to close the flow path of the first connector 100; when valve core 120 is in the first open position, it moves away from port 116 to open the flow path of the first connector 100.

[0006] The valve core 120 may include a valve core head 124 and a support 126. A seal 128 may be provided between the outer periphery of the valve core head 124 and the inner periphery of the first segment 112. In the illustrated embodiment, the seal 128 is embedded in the outer periphery of the valve core head 124 for sealing contact with the inner periphery of the port 116. The elastic member 122 may be in the form of a helical spring. One end of the elastic member 122 may abut against the support 126 of the valve core 120, and the other end of the elastic member 122 may abut against the inner step portion 130 of the second segment 114, thereby biasing the valve core 120 toward a first closed position blocking the port 116. When the valve core 120 is biased to the first closed position by the elastic member 122, the seal 128 of the valve core head 124 seals against the inner periphery of the port 116, thereby closing the fluid path of the first connector 100. When the valve core 120 is subjected to a pushing force along the first axial direction A1, the valve core 120 can resist the elastic force of the elastic member 122 and move away from the port 116 to the first open position, thereby opening the flow path of the first connector 100.

[0007] The second connector 200 may further include a valve assembly 210 disposed within the first portion 206 of the second connector body 202 and used to control the opening and closing of the fluid path of the second connector 200. In the illustrated embodiment, the valve assembly 210 may include a valve stem 212, a sliding sleeve 214, and an elastic element 216. The valve stem 212 may be positioned in the first portion 206 of the second connector body 202 along a second axial direction A2. The valve stem 212 may include a valve stem head 218 and a valve stem base 220 at its two ends, respectively. The valve stem base 220 includes a through hole 222 through which fluid flows. The sliding sleeve 214 may be sleeved within the first portion 206 outside the valve stem 212 and is slidable along the second axial direction A2 between a second closed position and a second open position. Specifically, the sliding sleeve 214 can seal the annular gap between the first portion 206 and the valve stem head 218 when in the second closed position, thereby closing the flow path of the second connector 200. When in the second open position, the sliding sleeve 214 can disengage from the annular gap, thereby opening the flow path of the second connector 200. Seals 224 and 225 can be respectively provided between the outer periphery of the sliding sleeve 214 and the inner periphery of the first portion 206, and between the inner periphery of the sliding sleeve 214 and the outer periphery of the valve stem head 218.

[0008] In the illustrated embodiment, the two ends of the elastic element 216 can respectively abut against the sliding sleeve 214 and the valve stem base 220 to bias the sliding sleeve 214 toward the second closed position. The elastic element 216 can be in the form of a helical spring. A limiting protrusion 226 can be provided on the outer periphery of the sliding sleeve 214. A limiting surface 228 is provided on the inner periphery of the first portion 206, and the limiting protrusion 226 and the limiting surface 228 can abut against each other to limit the sliding sleeve 214 to the second closed position.

[0009] When the sliding sleeve 214 is biased into the second closed position by the elastic element 216, the sliding sleeve 214 cooperates with the seals 224 and 225 to jointly block the annular gap between the first part 206 and the valve stem head 218, thereby closing the flow path of the second connector 200. When the sliding sleeve 214 is subjected to a pushing force along the second axial direction A2, the sliding sleeve 214 can resist the elastic force of the elastic element 216 and move away from the annular gap to the second open position, thereby opening the flow path of the second connector 200.

[0010] In the existing technology, the sliding sleeve needs to be aligned with the locking protrusion and inserted before rotating the sliding sleeve to achieve locking, which is inconvenient to use. Utility Model Content

[0011] The purpose of this utility model is to provide an anti-overflow bidirectional check valve liquid cooling pipeline connection assembly. After the first connector is connected to the second connector, it can automatically lock. To unlock, press the button.

[0012] To achieve the above objectives, this utility model provides an anti-overflow bidirectional check valve liquid cooling pipeline connection assembly, including a first connector and a second connector. The first connector includes a first handle for connecting the pipeline, a fixed tube with a first flow channel section, a movable valve core housed within the fixed tube, and a first compression spring for driving the movable valve core to close the first flow channel. The fixed tube and the movable valve core are provided with a sealing ring A. The second connector includes a second handle for connecting the pipeline, a fixed sleeve, a movable tube with a second flow channel housed within the fixed sleeve, and a fixed valve stem with a sealing ring B. A second compression spring is provided to drive the movable tube to seal the second flow channel with the sealing ring B. The spring has a fixed tube and a movable tube respectively provided with sealing rings C and D for sealing the sleeve. The outer circumferential surface of the fixed sleeve is provided with a locking protrusion ring whose cross-section gradually decreases away from the handle. It also includes a button with a pair of elastic arms. The elastic arm is provided with a locking wedge for locking the locking protrusion ring. The lower end of the elastic arm is provided with a sliding opening slope. The handle is welded and fixed with a shell sleeved on the fixed tube. The shell is provided with a front wall and a rear wall on both sides of the elastic arm, and an upper connecting part and a lower connecting part connected between the front wall and the rear wall and located between the pair of elastic arms. The lower connecting part is provided with a supporting slope that cooperates with the sliding opening slope.

[0013] In one embodiment of this utility model, the elastic arm is provided with an anti-falling wedge block facing away from the center of the fixed tube in the middle, and the outer shell is provided with a side connecting beam that cooperates with the anti-falling wedge block to connect the front wall and the rear wall.

[0014] In one embodiment of the present invention, the upper connecting part is used to limit the downward pressing distance of the button, and when the button abuts against the upper connecting part, the locking wedge moves away from the center of the fixing tube to allow the fixing sleeve to be pulled out.

[0015] In one embodiment of this utility model, the side of the locking wedge block facing away from the first connecting handle is an insertion guide slope that cooperates with the locking protrusion ring.

[0016] In one embodiment of this utility model, the outer shell is provided with a first anti-accidental pressure protrusion and a second anti-accidental pressure protrusion extending away from the center of the fixing tube on both sides of the front and rear of the button.

[0017] In one embodiment of this utility model, the outer shell is provided with a guide protrusion, and the button has a guide notch on the side opposite to the first handle that cooperates with the guide protrusion.

[0018] In one embodiment of this utility model, the fixed valve stem includes a connecting ring disposed between the fixed sleeve and the second connecting handle. The fixed sleeve is provided with a limiting step for limiting the movement range of the movable tube. The movable tube is provided with a limiting protrusion that cooperates with the limiting step. When the limiting protrusion abuts against the limiting step, the sealing ring B closes the second flow channel and the end face of the fixed valve stem is flush with the end face of the movable tube. The rod-shaped body of the fixed valve stem is connected to the connecting ring through multiple connecting plates. A flow gap is provided between the multiple connecting plates. An annular groove for installing the sealing ring B is opened on the outer peripheral surface of the end of the rod-shaped body facing away from the second connecting handle.

[0019] In one embodiment of this utility model, the movable valve core is provided with a limiting base with a gradually increasing cross-section and a flow hole, and the fixed tube is provided with a limiting conical surface that cooperates with the limiting base. When the limiting base abuts against the limiting conical surface, the sealing ring A closes the first flow channel and the end face of the fixed tube is flush with the end face of the movable valve core. The outer peripheral surface of the end of the valve core facing away from the first handle is provided with an annular groove for installing the sealing ring A.

[0020] In one embodiment of this utility model, the first handle has a long tube body that fits against the outer wall of the outer shell and a short tube body that fits against the inside of the outer shell. The outer shell has an outer limiting ring that abuts against the end face of the long tube body. The fixing tube has a positioning protrusion that fits against the inner arm of the outer shell. The outer shell has an inner limiting ring that abuts against the positioning protrusion. The positioning protrusion has an annular groove for accommodating the sealing ring E. The positioning protrusion is located between the end face of the short tube body and the inner limiting ring. The long tube body, the short tube body, and the outer shell are welded and fixed. The end face of the fixing sleeve has an annular receiving groove for accommodating a portion of the second handle tube. The end face of the second handle has an annular groove for accommodating the sealing ring F. The outer circumferential surface of the second handle has a limiting protrusion that mates with the end face of the fixing sleeve.

[0021] In one embodiment of this utility model, the outer peripheral surface of the fixed sleeve is provided with a limiting inclined surface that fits against the insertion guide surface to limit the movement range of the locking wedge. When the insertion guide surface abuts against the limiting inclined surface, the locking wedge locks the locking protrusion ring, the fixed valve stem abuts against the movable valve core, the first flow channel and the second flow channel are unobstructed, and the sealing ring C and the sealing ring D seal the fixed tube, the movable tube and the movable tube.

[0022] In this invention, the elastic arm is provided with a locking wedge, and the outer circumferential surface of the fixed sleeve is provided with a locking protrusion ring whose cross-section gradually decreases in the opposite direction to the handle. When the fixed tube is inserted into the fixed sleeve, the locking protrusion ring can automatically open the elastic arm until it is locked. When unlocking is required, the user can press the button to make the sliding opening slope at the lower end of the elastic arm cooperate with the supporting slope to move the locking wedge block away from the center of the fixed tube so as to allow the fixed sleeve to be pulled out. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an existing bidirectional shut-off valve.

[0024] Figure 2 for Figure 1 Cross-sectional view of the first connector.

[0025] Figure 3 for Figure 1 Cross-sectional view of the second connector.

[0026] Figure 4 A schematic diagram of the structure of the anti-overflow bidirectional check valve liquid cooling pipeline connection assembly of the first embodiment of this utility model.

[0027] Figure 5 for Figure 4 Cross-sectional view of the anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly.

[0028] Figure 6 for Figure 5 A cross-sectional view of the connection status of the anti-overflow bidirectional check valve liquid cooling pipeline connection assembly.

[0029] Figure 7 for Figure 4 Exploded view of the anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly.

[0030] Figure 8 for Figure 7 The structural diagram of the fixed valve stem and the movable valve core.

[0031] Figure 9 for Figure 7 A structural diagram of the button and its casing. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 4-9In the first embodiment of this utility model, an anti-overflow bidirectional check valve liquid cooling pipeline connection assembly includes a first connector 100 and a second connector 200. The first connector 100 includes a first handle 117 for connecting the pipeline, a fixed tube 112 with a first flow channel 101 section, a movable valve core 124 housed in the fixed tube 112, and a first compression spring 118 for driving the movable valve core 124 to close the first flow channel 101. The fixed tube 112 and the movable valve core 124 are provided with a sealing ring A. The second connector 200 includes a second handle 217 for connecting the pipeline, a fixed sleeve 206, a movable tube 214 with a second flow channel 201 housed in the fixed sleeve 206, and a fixed valve stem 212 with a sealing ring B for driving the movable tube 214 to close the sealing ring B. The second compression spring 216 of the second flow channel 201 is sealed. The fixed tube 112 and the movable tube 214 are respectively provided with sealing rings C and D for sealing the sleeve. The outer peripheral surface of the fixed sleeve 206 is provided with a locking protrusion ring 204 with a gradually decreasing cross section facing away from the handle. It also includes a button 3 with a pair of elastic arms 31. The elastic arm 31 is provided with a locking wedge 311 for locking the locking protrusion ring 204. The lower end of the elastic arm 31 is provided with a sliding opening slope 312. The first handle 117 is welded and fixed with a shell 4 sleeved outside the fixed tube 112. The shell 4 is provided with a front wall 41 and a rear wall 42 located on both sides of the elastic arm 31, and an upper connecting part 43 and a lower connecting part 44 located between the pair of elastic arms 31 connecting the front wall 41 and the rear wall 42. The lower connecting part 44 is provided with a supporting slope 440 that cooperates with the sliding opening slope 312.

[0034] The elastic arm 31 is provided with an anti-falling wedge 313 in the middle, which is located away from the center of the fixed tube 112. The outer shell 4 is provided with a side connecting beam 45 that cooperates with the anti-falling wedge 313 to connect the front wall 41 and the rear wall 42.

[0035] The upper connecting part 43 is used to limit the downward pressing distance of the button 3. When the button 3 abuts against the upper connecting part 43, the locking wedge 311 moves away from the center of the fixing tube 112 to allow the fixing sleeve 206 to be pulled out.

[0036] The side of the locking wedge 311 facing away from the first handle 117 is an insertion guide slope that mates with the locking protrusion ring 204.

[0037] The outer casing 4 is provided with a first anti-accidental pressure protrusion 46 and a second anti-accidental pressure protrusion 47 extending from the center of the back fixing tube 112 on both sides of the button 3.

[0038] The outer casing 4 is provided with a guide protrusion 403, and the button 3 has a guide notch 30 on the side facing away from the first handle 117 that cooperates with the guide protrusion.

[0039] The fixed valve stem 212 includes a connecting ring 220 disposed between the fixed sleeve 206 and the second handle 217. The fixed sleeve 206 is provided with a limiting step 228 for limiting the movement range of the movable tube 214. The movable tube 214 is provided with a limiting protrusion 226 that cooperates with the limiting step 228. When the limiting protrusion 226 abuts against the limiting step 228, the sealing ring B closes the second flow channel 201 and the end face of the fixed valve stem 212 is flush with the end face of the movable tube 214. The rod-shaped body 2121 of the fixed valve stem 212 is connected to the connecting ring 220 through multiple connecting plates 2122. A flow gap 222 is provided between the multiple connecting plates 2122. An annular groove for installing the sealing ring B is opened on the outer peripheral surface of the end of the rod-shaped body 2121 facing away from the second handle 217.

[0040] The movable valve core 124 is provided with a limiting base 1241 with a gradually increasing cross section and a flow hole 1240. The fixed tube 112 is provided with a limiting conical surface 1120 that cooperates with the limiting base 1241. When the limiting base 1241 abuts against the limiting conical surface 1120, the sealing ring A closes the first flow channel 101 and the end face of the fixed tube 112 is flush with the end face of the movable valve core 124. The outer peripheral surface of the end of the valve core facing away from the first connecting handle 117 is provided with an annular groove for installing the sealing ring A.

[0041] The first connecting handle 117 has a long tube 1171 that fits against the outer wall of the outer shell 4 and a short tube 1172 that fits against the inside of the outer shell 4. The outer shell 4 has an outer limiting ring 401 that abuts against the end face of the long tube 1171. The fixing tube 112 has a positioning protrusion 1122 that fits against the inner arm of the outer shell 4. The outer shell 4 has an inner limiting ring 402 that abuts against the positioning protrusion 1122. The positioning protrusion 1122 has an annular groove for accommodating the sealing ring E. The positioning protrusion 1122 is located between the end face of the short tube 1172 and the inner limiting ring 402. The long tube 1171, the short tube 1172, and the outer shell 4 are welded and fixed. The end face of the fixing sleeve 206 has an annular receiving groove for accommodating part of the second connecting handle 217 tube. The end face of the second connecting handle 217 has an annular groove for accommodating the sealing ring F. The outer circumferential surface of the second connecting handle 217 has a limiting protrusion 2171 that mates with the end face of the fixing sleeve 206.

[0042] The outer circumferential surface of the fixed sleeve 206 is provided with a limiting inclined surface 2061 that fits against the insertion guide surface to limit the movement range of the locking wedge 311. When the insertion guide surface abuts against the limiting inclined surface 2061, the locking wedge 311 locks the locking protrusion 204, the fixed valve stem 212 abuts against the movable valve core 124, the first flow channel 101 and the second flow channel 201 are unobstructed, and the sealing rings C and D seal the fixed tube 112, the movable tube 214 and the movable tube 214.

[0043] In this invention, the elastic arm 31 is provided with a locking wedge 311, and the outer peripheral surface of the fixed sleeve 206 is provided with a locking protrusion 204 whose cross-section gradually decreases away from the handle. When the fixed tube 112 is inserted into the fixed sleeve 206, the locking protrusion 204 can automatically open the elastic arm 31 until it is locked. When unlocking is required, the user can press the button 3 to make the sliding opening slope 312 at the lower end of the elastic arm 31 cooperate with the support slope 440 to make the locking wedge 311 move away from the center of the fixed tube 112 so as to allow the fixed sleeve 206 to be pulled out.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled pipeline connection assembly for an anti-overflow bidirectional check valve, comprising a first connector and a second connector. The first connector includes a first handle for connecting the pipeline, a fixed tube having a first flow channel section, a movable valve core housed within the fixed tube, and a first compression spring for driving the movable valve core to close the first flow channel. The fixed tube and the movable valve core are provided with a sealing ring A. The second connector includes a second handle for connecting the pipeline, a fixed sleeve, a movable tube having a second flow channel housed within the fixed sleeve, a fixed valve stem provided with a sealing ring B, and a second compression spring for driving the movable tube to seal the second flow channel in conjunction with the sealing ring B. The fixed tube and the movable tube are respectively provided with a sealing ring C and a sealing ring D for sealing the sleeve. The outer circumferential surface of the fixed sleeve is provided with a locking protrusion ring whose cross-section gradually decreases away from the handle. It also includes a button with a pair of elastic arms. The elastic arm is provided with a locking wedge for locking the locking protrusion ring. The lower end of the elastic arm is provided with a sliding opening slope. The handle is welded and fixed with a shell sleeved on the outside of the fixed tube. The shell is provided with a front wall and a rear wall on both sides of the elastic arm, and an upper connecting part and a lower connecting part connected between the front wall and the rear wall and located between the pair of elastic arms. The lower connecting part is provided with a supporting slope that cooperates with the sliding opening slope.

2. The anti-overflow bidirectional check valve liquid cooling pipe connection assembly according to claim 1, characterized in that, The elastic arm is provided with an anti-falling wedge block in the middle, facing away from the center of the fixed tube, and the outer shell is provided with a side connecting beam that cooperates with the anti-falling wedge block to connect the front wall and the rear wall.

3. The anti-overflow bidirectional check valve liquid cooling pipe connection assembly according to claim 2, characterized in that, The upper connecting part is used to limit the downward pressing distance of the button. When the button abuts against the upper connecting part, the locking wedge moves away from the center of the fixing tube to allow the fixing sleeve to be pulled out.

4. The anti-overflow bidirectional check valve liquid cooling pipe connection assembly according to claim 3, characterized in that, The side of the locking wedge facing away from the first handle is an insertion guide slope that mates with the locking protrusion ring.

5. The anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly according to claim 4, characterized in that, The outer casing is provided with a first anti-accidental pressure protrusion and a second anti-accidental pressure protrusion extending away from the center of the fixing tube on both the front and rear sides of the button.

6. The anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly according to claim 5, characterized in that, The outer casing is provided with a guide protrusion, and the button has a guide notch on the side facing away from the first handle that cooperates with the guide protrusion.

7. The anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly according to claim 5, characterized in that, The fixed valve stem includes a connecting ring disposed between the fixed sleeve and the second connecting handle. The fixed sleeve is provided with a limiting step for restricting the movement range of the movable tube. The movable tube is provided with a limiting protrusion that cooperates with the limiting step. When the limiting protrusion abuts against the limiting step, the sealing ring B closes the second flow channel and the end face of the fixed valve stem is flush with the end face of the movable tube. The rod-shaped body of the fixed valve stem is connected to the connecting ring through multiple connecting plates. A flow gap is provided between the multiple connecting plates. An annular groove for installing the sealing ring B is opened on the outer peripheral surface of the end of the rod-shaped body facing away from the second connecting handle.

8. The anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly according to claim 7, characterized in that, The movable valve core is provided with a limiting base with a gradually increasing cross-section and a flow hole. The fixed tube is provided with a limiting conical surface that cooperates with the limiting base. When the limiting base abuts against the limiting conical surface, the sealing ring A closes the first flow channel and the end face of the fixed tube is flush with the end face of the movable valve core. The outer peripheral surface of the end of the valve core facing away from the first handle is provided with an annular groove for installing the sealing ring A.

9. The anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly according to claim 8, characterized in that, The first connecting handle has a long tube body that fits against the outer wall of the outer shell and a short tube body that fits against the inside of the outer shell. The outer shell has an outer limiting ring that abuts against the end face of the long tube body. The fixing tube has a positioning protrusion that fits against the inner arm of the outer shell. The outer shell has an inner limiting ring that abuts against the positioning protrusion. The positioning protrusion has an annular groove for accommodating the sealing ring E. The positioning protrusion is located between the end face of the short tube body and the inner limiting ring. The long tube body, the short tube body, and the outer shell are welded and fixed. The end face of the fixing sleeve has an annular receiving groove for accommodating part of the second connecting handle. The end face of the second connecting handle has an annular groove for accommodating the sealing ring F. The outer circumferential surface of the second connecting handle has a limiting protrusion that mates with the end face of the fixing sleeve.

10. The anti-overflow bidirectional check valve liquid-cooled pipeline connection assembly according to claim 9, characterized in that, The outer circumferential surface of the fixed sleeve is provided with a limiting inclined surface that fits against the insertion guide surface to limit the movement range of the locking wedge. When the insertion guide surface abuts against the limiting inclined surface, the locking wedge locks the locking protrusion ring, the fixed valve stem abuts against the movable valve core, the first flow channel and the second flow channel are unobstructed, and the sealing ring C and the sealing ring D seal the fixed tube, the movable tube and the movable tube.

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