Water circuit shut-off valve

Abstract

This invention discloses a water circuit shut-off valve, comprising: a valve body assembly having a valve core mounting cavity and a connecting rod portion movement space located on the outer periphery of the valve core mounting cavity; the valve core of the valve body assembly being movably disposed in the valve core mounting cavity; and a push assembly including a drive member and a push connecting member, the push connecting member being sleeved on the valve core and having a connecting rod portion extending outward into the connecting rod portion movement space; the drive member and the connecting rod portion being drivenly connected. This water circuit shut-off valve has the advantages of simple structure and the ability to quickly and conveniently determine its operating status.

Description

Technical Field

[0001] This invention relates to the field of shut-off valve technology, and more specifically to a water shut-off valve. Background Technology

[0002] Currently, there are two common methods for switching water circuits on and off: ball valves and spool valves. A typical example of a ball valve is a cylinder-operated ball valve. Because the rotation of a ball valve requires a large torque, an external cylinder with a long stroke is usually used to push the ball valve handle or rotate the valve. The other type is the spool valve, which typically has two solutions: one integrates a cylinder at the top of the valve, and the other uses a portion of the valve's internal chamber as a cylinder. However, both of these valve types have complex structures and present the problem of difficulty in determining whether the valve is working properly. For example, if the valve core becomes stuck, the valve's operating status cannot be directly determined by external observation. Therefore, it is necessary to disconnect the water pipe connected to the tail end for further diagnosis, leading to higher repair costs. Summary of the Invention

[0003] The purpose of this invention is to provide a water circuit shut-off valve, which has the advantages of simple structure and the ability to quickly and conveniently determine its working status.

[0004] To achieve the above objectives, the present invention provides a water circuit shut-off valve, the water circuit shut-off valve comprising:

[0005] The valve body assembly has a valve core mounting cavity and a connecting rod portion moving space located on the outer periphery and communicating with the valve core mounting cavity. The valve core of the valve body assembly is movably disposed in the valve core mounting cavity.

[0006] The actuating assembly includes a driving member and a driving connector, the driving connector being sleeved on the valve core and having a connecting rod portion extending outward into the moving space of the connecting rod portion, the driving member and the connecting rod portion being drivenly connected.

[0007] In an embodiment of the present invention, a clearance portion is also formed on the side of the valve body assembly near the connecting rod portion, and the driving component is a telescopic cylinder disposed in the clearance portion, with the telescopic end of the telescopic cylinder connected to the connecting rod portion.

[0008] In an embodiment of the present invention, the valve body assembly has a blocking portion formed in the length direction, the push connector is located on one side of the blocking portion, and the drive member is an airbag disposed between the push connector and the blocking portion.

[0009] In an embodiment of the present invention, the water circuit shut-off valve further includes an elastic reset member for resetting the push connection member.

[0010] In an embodiment of the present invention, the valve body assembly further includes a first valve body and a second valve body. A valve core mounting cavity is formed inside the first valve body. A water flow channel for communicating with the water inlet of the first valve body is formed inside the valve core. The second valve body is disposed on one side of the first valve body and has a water outlet and a sealing body receiving cavity communicating with the water outlet. A sealing body receiving cavity is provided in the sealing body receiving cavity for sealing the water outlet end of the water flow channel.

[0011] In an embodiment of the present invention, an outwardly expanding outlet is formed at one end of the water flow channel near the sealing body.

[0012] In an embodiment of the present invention, a sealing portion made of rubber is provided on the side end face of the sealing body near the valve core.

[0013] In an embodiment of the present invention, the water circuit shut-off valve further includes a first sealing assembly and a second sealing assembly respectively embedded on the inner peripheral walls at both ends of the valve core mounting cavity and located on the outer side of the valve core.

[0014] In embodiments of the present invention, both the first sealing assembly and the second sealing assembly include a first sealing ring and a second sealing ring disposed adjacent to each other.

[0015] In an embodiment of the present invention, the second valve body further includes a docking portion inserted into the first valve body, a sealing body receiving cavity formed in the docking portion, and the water circuit shut-off valve further includes a third sealing ring sleeved on the outer peripheral side of the docking portion.

[0016] As shown in the above technical solution, the water circuit shut-off valve includes a valve body assembly and a push assembly. The valve body assembly has a moving space for the connecting rod portion. The valve core is movably disposed within the valve body assembly. The push assembly includes a drive component and a push connecting component. The push connecting component is sleeved on the valve core and has a connecting rod portion extending radially outward into the moving space of the connecting rod portion. The drive component and the connecting rod portion are drivenly connected. Operators can directly observe the position of the connecting rod portion to determine the position of the valve core, thereby determining the working status of the water circuit shut-off valve. This facilitates troubleshooting of the water circuit shut-off valve and also prevents communication between the pipeline connected to the drive component and the water circuit of the water circuit shut-off valve, improving the safety of the water circuit shut-off valve in actual application. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a cross-sectional schematic diagram of the water circuit shut-off valve when it is opened in an embodiment of the present invention (the driving component is a telescopic cylinder);

[0019] Figure 2This is a cross-sectional schematic diagram of the water circuit shut-off valve when it is closed in an embodiment of the present invention (the driving component is a telescopic cylinder);

[0020] Figure 3 This is a cross-sectional schematic diagram of the water circuit shut-off valve when it is opened in an embodiment of the present invention (the driving component is an airbag);

[0021] Figure 4 This is a cross-sectional schematic diagram of the water circuit shut-off valve when it is closed in an embodiment of the present invention (the driving component is an airbag);

[0022] Figure 5 This is a cross-sectional schematic diagram of the valve core in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the driving component (the driving component is an airbag) in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the first type of push connector in an embodiment of the present invention (the driving component is an airbag);

[0025] Figure 8 This is a schematic diagram of the structure of the second type of push connector in the embodiment of the present invention (the driving component is an airbag).

[0026] Explanation of reference numerals in the attached figures

[0027] 1-Valve body assembly; 101-Valve core mounting cavity; 102-Linking rod moving space; 103-Valve core; 1031-Water flow channel; 1032-Outward expansion outlet; 104-Avoiding part; 105-Blocking part; 106-First valve body; 1061-Inlet; 1062-Connecting part; 107-Second valve body; 1071-Outlet; 1072-Sealing body receiving cavity; 1073-Sealing body; 1074-Sealing part; 1075-Mating part; 2-Pushing assembly; 201-Driver; 202-Pushing connector; 2021-Linking rod; 3-Elastic reset part; 4-First sealing assembly; 5-Second sealing assembly; 501-First sealing ring; 502-Second sealing ring; 6-Third sealing ring. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] Embodiments of the present invention provide a novel water circuit shut-off valve, such as... Figures 1-8As shown, the water circuit shut-off valve includes a valve body assembly 1 and a push assembly 2. Specifically, the valve body assembly 1 has a valve core mounting cavity 101 and a connecting rod portion moving space 102 located on the outer periphery and communicating with the valve core mounting cavity 101. The connecting rod portion moving space 102 has an opening communicating with the outside on the side away from the valve core 103. The valve core 103 of the valve body assembly 1 is movably disposed in the valve core mounting cavity 101. The push assembly 2 includes a drive member 201 and a push connecting member 202. The push connecting member 202 is sleeved on the valve core 103 and has a connecting rod portion 2021 extending radially outward into the connecting rod portion moving space 102. The drive member 201 and the connecting rod portion 2021 are drivenly connected. When the drive component 201 performs its driving function, it applies a pushing force to the push connector 202 via the connecting rod 2021. This pushes the connector 202, which in turn moves the valve core 103 within the valve core mounting cavity 101, thereby enabling the opening and closing of the water circuit shut-off valve. Furthermore, operators can directly observe the position of the connecting rod 2021 to determine the position of the valve core 103, thus identifying the working status of the water circuit shut-off valve (e.g., whether the valve core 103 is stuck by observing the position of the connecting rod 2021). This facilitates troubleshooting of the water circuit shut-off valve. Moreover, since the moving space 102 of the connecting rod is not sealed, it prevents communication between the pipes connected to the drive component 201 and the water circuit of the water circuit shut-off valve, improving the safety of the water circuit shut-off valve in practical applications. For example, when the water circuit shut-off valve is used in a pneumatic system or chassis braking system, the above-mentioned design ensures the safety of the pneumatic system or chassis braking system.

[0030] In one embodiment of the present invention, the interior of the first valve body 106 is further provided with a first limiting portion and a second limiting portion located at both ends of the valve core mounting cavity 101. The first limiting portion and the second limiting portion are used to limit the two ends of the valve core 103 in the moving direction, respectively. The distance between the first limiting portion and the second limiting portion is the distance that the valve core 103 can move. This distance can be designed according to the actual requirements of the flow rate of the water circuit switching valve. For example, if a large flow rate of the water circuit switching valve is required, the distance between the first limiting portion and the second limiting portion can be designed to be larger; if a small flow rate of the water circuit switching valve is required, the distance between the first limiting portion and the second limiting portion can be designed to be smaller.

[0031] In one embodiment of the present invention, a clearance portion 104 is also formed on the side of the valve body assembly 1 near the connecting rod portion 2021, and the driving member 201 is a telescopic cylinder disposed in the clearance portion 104, such as... Figures 1-2As shown, the telescopic cylinder's telescopic end is connected to the connecting rod portion 2021. Specifically, the clearance portion 104 is located on one side of the connecting rod portion's moving space 102 and communicates with it. The drive component 201 is positioned on the clearance portion 104, allowing workers to directly observe or contact it, facilitating observation of its working status and troubleshooting or replacement. Furthermore, the valve body assembly 1 in this embodiment also has a connecting portion 1062, located on the side of the connecting rod portion's moving space 102 away from the clearance portion 104. In this embodiment, the telescopic cylinder can be a telescopic air cylinder. The telescopic rod of the telescopic air cylinder passes through the connecting rod portion 2021 and the connecting portion 1062 in sequence, while the telescopic rod and the connecting rod portion 2021 are connected together. When the telescopic rod extends or retracts, it drives the connecting component 202 and the valve core 103 to move together, thereby realizing the opening and closing functions of the water circuit switching valve. In addition, in this embodiment, the telescopic cylinder can also be replaced with a telescopic hydraulic cylinder or an electric telescopic rod, or other components with telescopic functions.

[0032] In another embodiment of the present invention, the valve body assembly 1 has a blocking portion 105 formed in the length direction, the push connector 202 is located on one side of the blocking portion 105, and the drive member 201 is an airbag disposed between the push connector 202 and the blocking portion 105. Specifically, as Figures 3-4 As shown, in this embodiment, the blocking part 105 is located on one side of the moving space 102 of the connecting rod and is annular, as... Figure 6 As shown, the moving space 102 of the connecting rod is also circular. The airbag is circular and located between the connecting rod 2021 and the blocking part 105. The valve core 103 passes through the circular hole in the middle of the airbag. This type of airbag structure is simple, easy to manufacture, and can fit well with the side end face of the blocking part 105 near the airbag. Inflating the airbag causes it to expand, thereby pushing the push connector 202 and the valve core 103 to move together, thus realizing the opening function of the water circuit switching valve. The push connector 202 also includes a circular part sleeved on the valve core 103. There are multiple connecting rods 2021, which are evenly distributed on the outer periphery of the circular part (e.g., Figures 7-8 As shown, in this embodiment, the number of connecting rods 2021 is preferably 4 or 3. This arrangement allows the airbag to apply a pushing force to the pushing connector 202 more evenly, so that the pushing connector 202 is subjected to uniform force, thereby making the valve core 103 move more smoothly.

[0033] In one embodiment of the present invention, the water circuit shut-off valve further includes an elastic reset member 3 for resetting the push connector 202. Specifically, the elastic reset member 3 is preferably a spring. In an embodiment where the drive member 201 is a telescopic cylinder, the spring is sleeved on the telescopic rod of the telescopic cylinder and located between the connecting part 1062 and the connecting rod part 2021. Gas is input into the cylinder through the air inlet on the cylinder body. When the thrust generated by the gas can overcome the elastic force of the spring and the pressure at the water inlet end of the water supply valve core 103, the telescopic rod of the telescopic cylinder extends, and the water circuit shut-off valve is opened. When the gas in the telescopic cylinder is released outward, and the elastic force of the spring and the pressure at the water inlet end of the water supply valve core 103 are greater than the thrust generated by the gas, the telescopic rod of the telescopic cylinder retracts, and the water circuit shut-off valve is closed.

[0034] In the embodiment where the driving component 201 is an airbag, a spring is sleeved on the outside of the valve core 103. One end of the spring abuts against the side wall of the moving space 102 of the connecting rod portion away from the blocking portion 105, and the other end of the spring abuts against the connecting rod portion 2021. When the airbag is inflated, the thrust generated by the gas can overcome the elastic force of the spring and the pressure of water supply to the inlet end of the valve core 103, pushing the connecting rod to move the valve core 103 in the direction of the spring, so that the water circuit shut-off valve is opened. When the gas in the airbag is released outward, and the elastic force of the spring and the pressure of water supply to the inlet end of the valve core 103 are greater than the thrust generated by the gas, pushing the connecting rod to move the valve core 103 away from the spring, and the water circuit shut-off valve is closed.

[0035] In one embodiment of the present invention, the valve body assembly 1 further includes a first valve body 106 and a second valve body 107. A valve core mounting cavity 101 is formed inside the first valve body 106. A water flow channel 1031 for communicating with the water inlet 1061 of the first valve body 106 is formed inside the valve core 103. The second valve body 107 is disposed on one side of the first valve body 106 and has a water outlet 1071 and a sealing body receiving cavity 1072 communicating with the water outlet 1071. A sealing body 1073 for sealing the water outlet end of the water flow channel 1031 is provided in the sealing body receiving cavity 1072. Specifically, in the embodiment where the driving member 201 is a telescopic cylinder, both the connecting part 1062 and the avoidance part 104 are formed on the first valve body 106; in the embodiment where the driving member 201 is an airbag, the blocking part 105 is formed on the first valve body 106. When the driving component 201 drives the push connecting component 202 to move away from the driving component 201, the push connecting component 202 drives the valve core 103 to move away from the sealing body 1073. A gap appears between the valve core 103 and the sealing body 1073. Water flowing into the water flow channel 1031 from the inlet 1061 flows out from the outlet 1071 after passing through the gap between the valve core 103 and the sealing body 1073 and the sealing body receiving cavity 1072. When the driving component 201 stops operating and the reset elastic component 3 pushes the push connecting component 202 to move closer to the driving component 201, the push connecting component 202 drives the valve core 103 to move closer to the sealing body 1073. The outlet end of the valve core 103 abuts against the sealing body 1073, and the sealing body 1073 blocks the outlet end of the water flow channel 1031, thus closing the water flow cut-off valve.

[0036] In one embodiment of the present invention, an outwardly expanding outlet 1032 is formed at one end of the water flow channel 1031 near the sealing body 1073. Specifically, the outwardly expanding outlet 1032 has a frustum-shaped inclined peripheral wall. This arrangement makes the side cross-sectional area of ​​the valve core 103 at the water inlet end larger than the side cross-sectional area of ​​the valve core 103 at the water outlet end. When the water entering the water switching valve is high-pressure water, the pressure of the high-pressure water on the side end of the valve core 103 at the water inlet end is greater than the pressure of the high-pressure water on the side end of the valve core 103 at the water outlet end. This helps to press the valve core 103 tightly onto the sealing body 1073, which helps to ensure the sealing performance of the water switching valve when it is closed. When it is necessary to open the water switching valve, the high-pressure water at the water outlet end of the valve core 103 can exert a thrust on the valve core 103 away from the sealing body 1073 through the inclined peripheral wall of the outwardly expanding outlet 1032, which helps to reduce the difficulty of opening the water switching valve.

[0037] In one embodiment of the present invention, the sealing body 1073 is provided with a sealing part 1074 made of rubber on the side end face near the valve core 103. The side area of ​​the sealing part 1074 in the vertical direction is not less than the cross-sectional area of ​​the water outlet end of the valve core 103. The selection of rubber material for the sealing part 1074 is beneficial to ensuring the sealing performance when the water circuit switching valve is closed, and can also buffer the impact from the valve core 103, which is beneficial to extending the overall service life of the water circuit switching valve.

[0038] In one embodiment of the present invention, the water circuit shut-off valve further includes a first sealing component 4 and a second sealing component 5 respectively embedded on the inner peripheral walls at both ends of the valve core mounting cavity 101 and located on the outer side of the valve core 103. These components are used to seal the water circuit in the water circuit shut-off valve (which is composed of the channel in the first valve body 106 connected to the inlet 1061, the water flow channel 1031 in the valve core 103, the sealing body receiving cavity 1072 in the second valve body 107, and the channel in the second valve body 107 connected to the outlet 1071). This prevents dust or other impurities from entering the water circuit of the water circuit shut-off valve and also prevents water flowing in the first valve body 106 and the valve core 103 from flowing out through the gap between the first valve body 106 and the valve core 103 and entering the connecting rod moving space 102.

[0039] In one embodiment of the present invention, both the first sealing assembly 4 and the second sealing assembly 5 include a first sealing ring 501 and a second sealing ring 502 disposed adjacently. The first sealing ring 501 is located on the side near the moving space 102 of the connecting rod portion, and is used to prevent dust or other impurities from entering the water circuit of the water circuit shut-off valve. The second sealing ring 502 is used to prevent water flowing in the first valve body 106 and the valve core 103 from entering the moving space 102 of the connecting rod portion. In addition, the first sealing assembly 4 and the second sealing assembly 5 are both composed of two sealing rings, which further ensures the sealing of the water circuit in the water circuit shut-off valve. Even if the first sealing ring 501 and the second sealing ring 502 at the first sealing assembly 4 and the second sealing assembly 5 are damaged, the water flowing in the first valve body 106 and the valve core 103 will only leak into the water circuit. The moving space 102 of the connecting rod portion is in a non-sealed state and cannot generate pressure. Therefore, it will not affect the drive component 201, that is, it cannot break through the seal of the telescopic cylinder or the air bladder and leak into the pneumatic system. Furthermore, the cross-sectional shape of the first sealing ring 501 and the second sealing ring 502 includes a circle or a rectangle, which has the advantages of simple structure and easy manufacturing.

[0040] In one embodiment of the present invention, the second valve body 107 further includes a mating portion 1075 inserted into the first valve body 106, a sealing body receiving cavity 1072 formed in the mating portion 1075, and the water shut-off valve further includes a third sealing ring 6 sleeved on the outer periphery of the mating portion 1075. Specifically, the first valve body 106 has a mating portion 1075 mounting cavity formed at one end away from the inlet 1061, and the mating portion 1075 of the second valve body 107 is installed in the mating portion 1075 mounting cavity, thereby realizing the installation of the second valve body 107 and the first valve body 106 in sequence. The setting of the third sealing ring 6 can enhance the tightness of the connection between the second valve body 107 and the first valve body 106, prevent water inside the valve body assembly 1 from flowing out from the gap between the second valve body 107 and the first valve body 106, and further enhance the sealing performance of the water shut-off valve.

[0041] This invention provides a water circuit shut-off valve, comprising a valve body assembly and a push assembly. The valve body assembly has a connecting rod movement space. A valve core is movably disposed within the valve body assembly. The push assembly includes a drive member and a push connecting member. The push connecting member is sleeved on the valve core and has a connecting rod extending radially outward into the connecting rod movement space. The drive member and the connecting rod are drivenly connected. Operators can directly observe the position of the connecting rod to determine the position of the valve core, thereby identifying the operating status of the water circuit shut-off valve. This facilitates troubleshooting of the water circuit shut-off valve and prevents communication between the pipeline connected to the drive member and the water circuit of the water circuit shut-off valve, improving the safety of the water circuit shut-off valve in practical applications.

[0042] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A water circuit shut-off valve, characterized in that, The water circuit shut-off valve includes: A valve body assembly (1) has a valve core mounting cavity (101) and a connecting rod portion moving space (102) located on the outer periphery and communicating with the valve core mounting cavity (101). The valve core (103) of the valve body assembly (1) is movably disposed in the valve core mounting cavity (101). A clearance portion (104) is also formed on the side of the valve body assembly (1) near the connecting rod portion (2021). The clearance portion (104) is on one side of the connecting rod portion moving space (102) and communicates with the connecting rod portion moving space (102). The push assembly (2) includes a drive member (201) and a push connector (202). The push connector (202) is sleeved on the valve core (103) and has a connecting rod (2021) that extends outward into the moving space (102) of the connecting rod. The drive member (201) and the connecting rod (2021) are drivenly connected. The drive member (201) is a telescopic cylinder provided in the avoidance part (104). The telescopic end of the telescopic cylinder is connected to the connecting rod (2021).

2. The water circuit shut-off valve according to claim 1, characterized in that, The valve body assembly (1) has a blocking portion (105) formed in the length direction, the push connector (202) is located on one side of the blocking portion (105), and the drive member (201) is an airbag disposed between the push connector (202) and the blocking portion (105).

3. The water circuit shut-off valve according to claim 1 or 2, characterized in that, The water circuit shut-off valve also includes an elastic reset member (3) for resetting the push connector (202).

4. The water circuit shut-off valve according to claim 1 or 2, characterized in that, The valve body assembly (1) further includes a first valve body (106) and a second valve body (107). The valve core mounting cavity (101) is formed inside the first valve body (106). The valve core (103) has a water flow channel (1031) for communicating with the water inlet (1061) of the first valve body (106). The second valve body (107) is disposed on one side of the first valve body (106) and has a water outlet (1071) and a sealing body receiving cavity (1072) communicating with the water outlet (1071). The sealing body receiving cavity (1072) is provided with a sealing body (1073) for sealing the water outlet end of the water flow channel (1031).

5. The water circuit shut-off valve according to claim 4, characterized in that, The water flow channel (1031) has an outwardly expanding outlet (1032) at one end near the sealing body (1073).

6. The water circuit shut-off valve according to claim 4, characterized in that, The sealing body (1073) has a rubber sealing part (1074) on the side end face near the valve core (103).

7. The water circuit shut-off valve according to claim 4, characterized in that, The water circuit shut-off valve also includes a first sealing assembly (4) and a second sealing assembly (5) respectively embedded on the inner peripheral walls at both ends of the valve core mounting cavity (101) and located on the outer side of the valve core (103).

8. The water circuit shut-off valve according to claim 7, characterized in that, Both the first sealing assembly (4) and the second sealing assembly (5) include a first sealing ring (501) and a second sealing ring (502) arranged adjacent to each other.

9. The water circuit shut-off valve according to claim 8, characterized in that, The second valve body (107) further includes a docking portion (1075) inserted into the first valve body (106), the sealing body receiving cavity (1072) is formed in the docking portion (1075), and the water circuit shut-off valve further includes a third sealing ring (6) sleeved on the outer periphery of the docking portion (1075).

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