A connecting valve

Abstract

The utility model belongs to the technical field of expansion tank switch valve, disclose a kind of connecting valve. This connecting valve includes valve body, valve core, end cap and disposable locking assembly;Wherein valve body it includes main pipe and the first branch pipe of fixed installation in main pipe side portion, the one end of first branch pipe is provided with assembly opening, and the other end of first branch pipe is communicated with main pipe;The one end of valve core is assembled in first branch pipe, and can open and close main pipe, and the other end of valve core extends assembly opening and is provided with locking hole;End cap is capped in assembly opening, and locking hole corresponding with locking hole is opened in end cap;Disposable locking assembly includes plug-in part, plug-in part is configured to be able to be simultaneously arranged in each locking hole and locking hole when main pipe is opened. The connecting valve can intuitively determine whether the valve is in the open or closed state, reduce the misoperation rate, and at the same time, can avoid dust entering the valve core, ensure the service life of the valve core.

Description

Technical Field

[0001] This utility model relates to the field of expansion tank switch valve technology, and in particular to a connection valve. Background Technology

[0002] An expansion tank is a device used to balance pressure within a pipeline. In systems with expansion tanks, a connecting valve is typically installed between the pipeline and the tank. This valve should normally remain open to allow external water to enter the expansion tank when gas needs to be compressed, and should be able to be switched to closed when necessary for maintenance or replacement of the expansion tank. However, conventional connecting valves do not allow for direct observation of their internal working state, making it difficult to determine whether they are open or closed, increasing the probability of operator error. Furthermore, connecting valves typically lack dust protection; dust generated by pipeline vibrations can easily enter the valve core, leading to valve core jamming if not cleaned regularly.

[0003] Therefore, there is an urgent need for a connection valve to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a connecting valve that allows for intuitive judgment of whether the valve is in an open or closed state, thereby improving operational efficiency and safety, reducing the rate of misoperation, and preventing dust from entering the valve core, thus ensuring the service life of the valve core.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A connecting valve, comprising:

[0007] The valve body includes a main pipe and a first branch pipe fixedly installed on the side of the main pipe. One end of the first branch pipe is provided with an assembly port, and the other end of the first branch pipe is connected to the main pipe.

[0008] A valve core, one end of which is fitted into the first branch pipe and can open and close the main pipe, and the other end of which extends out of the fitting port and is provided with a locking hole.

[0009] An end cap is provided to cover the assembly port, and a locking hole corresponding to the locking hole is provided on the end cap.

[0010] A one-time locking assembly includes a connector configured to simultaneously pass through each of the locking holes and the locking holes when the main pipe is opened.

[0011] Preferably, the end cap includes a cover body, a first enclosure wall, and a second enclosure wall connected to each other. The first enclosure wall can be fitted onto the outer periphery of the valve core, the second enclosure wall can be fitted onto the outer periphery of the first branch pipe, the cover body can be pressed against the end of the valve core that extends out of the assembly port, and the locking hole is provided in the first enclosure wall.

[0012] Preferably, the locking hole penetrates the side wall of the first enclosure, and the tightening hole penetrates the valve core.

[0013] Preferably, the disposable locking assembly further includes a disposable latch capable of simultaneously locking at least a portion of the connector to the locking hole and the locking hole; the connector is strip-shaped and includes a first end and a second end, the first end passing through both the locking hole and the locking hole, and the disposable latch locking the first end and the second end.

[0014] Preferably, the second end surrounds the outside of the first branch pipe and is close to the first end, and the one-time lock is locked to both the first end and the second end.

[0015] Preferably, the connector is a lead-sealed wire; the disposable lock is a lead-sealed body.

[0016] Preferably, the first branch pipe includes an external body and an extension body that are interconnected. The assembly port is opened in the external body. The extension body extends into the main pipe and divides the main pipe into an inlet section and an outlet section. The inlet section and the outlet section are respectively located on both sides of the extension body. The extension body is respectively provided with an inlet port and an outlet port. The inlet port is connected to the inlet section, and the outlet port is connected to the outlet section. A water passage hole is formed in the middle of the extension body. The inlet port and the outlet port are respectively located on both sides of the water passage hole. The valve core can be sealed with the water passage hole to open / close the main pipe.

[0017] Preferably, the valve core is axially movable and fixed inside the first branch pipe. The valve core includes a first sealing body and a second sealing body, which are spaced apart from each other along the axial direction of the valve core. The inner wall of the outer body has a sealing section, in which the first sealing body seals with the sealing section, and the second sealing body seals with the water passage hole.

[0018] Preferably, the valve core further includes a threaded connector located between the first sealing body and the second sealing body; the first branch pipe is also provided with a threaded section located between the water passage hole and the sealing section, the threaded connector is threadedly engaged with the threaded section, and the diameter of the first sealing body is larger than the diameter of the threaded connector, and the diameter of the threaded connector is larger than the diameter of the second sealing body.

[0019] Preferably, the connecting valve further includes a second branch pipe, which is connected to the liquid outlet section, and an on / off assembly is provided on the second branch pipe.

[0020] The beneficial effects of this utility model are:

[0021] This utility model discloses a connecting valve. The connecting valve includes a valve body, a valve core, an end cap, and a one-time locking assembly. The valve body includes a main pipe and a first branch pipe fixedly installed on the side of the main pipe. One end of the first branch pipe has an assembly port, and the other end of the first branch pipe can connect to the main pipe. One end of the valve core is assembled inside the first branch pipe and can open and close the main pipe. The other end of the valve core extends out of the assembly port and has a locking hole. The end cap covers the assembly port and has a locking hole corresponding to the locking hole. The one-time locking assembly includes a connector configured to simultaneously pass through each locking hole and the locking hole when the main pipe is opened.

[0022] When the connector of the one-time locking assembly is simultaneously inserted into both the locking hole and the locking hole, the main pipe opens, allowing outside water to flow through the main pipe and into the expansion tank. Therefore, operators can intuitively and quickly determine the valve's open / closed status by observing the presence or damage of the connector, thus improving operational efficiency and safety and reducing the rate of misoperation. Furthermore, the end cap prevents dust from entering the valve core and the gap between the valve core and the first branch pipe through the assembly port, thereby ensuring the valve core's service life and preventing valve core jamming. Attached Figure Description

[0023] Figure 1 This is a front view of the connecting valve provided by this utility model;

[0024] Figure 2 This is a first cross-sectional view of the connecting valve provided by this utility model;

[0025] Figure 3 This is a cross-sectional view of the first branch pipe provided by this utility model;

[0026] Figure 4 This is a cross-sectional view of the valve core provided by this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the disposable locking assembly provided by this utility model;

[0028] Figure 6 This is a schematic diagram of the end cap provided by this utility model;

[0029] Figure 7 This is a structural schematic diagram of the limiting component provided by this utility model;

[0030] Figure 8 This is a first isometric view of the connecting valve provided by this utility model;

[0031] Figure 9 This is a second isometric view of the connecting valve provided by this utility model;

[0032] Figure 10 This is a second cross-sectional view of the connecting valve provided by this utility model.

[0033] In the picture:

[0034] 10. Main pipe; 11. Inlet section; 12. Outlet section;

[0035] 21. First branch pipe; 211. External body; 212. Extension body; 213. Water passage hole; 214. Sealing section; 215. Threaded section; 22. Assembly port; 23. Limiting groove; 24. Second branch pipe; 25. Connector; 26. Cap; 27. Liquid inlet; 28. Liquid outlet;

[0036] 30. Valve core; 31. Locking hole; 32. First sealing body; 33. Threaded connection body; 34. Second sealing body;

[0037] 40. End cap; 41. Locking hole; 42. First enclosure wall; 43. Second enclosure wall; 44. Cover body;

[0038] 50. One-time locking assembly; 51. Connector; 511. First end; 512. Second end; 52. One-time locking buckle;

[0039] 60. First sealing element;

[0040] 70. Second sealing element;

[0041] 80. Limiting component; 81. First limiting end; 82. Second limiting end. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] This embodiment provides a connecting valve, such as Figures 1-6 , Figure 8 and Figure 9 As shown, this connecting valve includes a valve body, a valve core 30, an end cap 40, and a one-time locking assembly 50. The valve body includes a main pipe 10 and a first branch pipe 21 fixedly installed on the side of the main pipe 10. One end of the first branch pipe 21 is provided with an assembly port 22, and the other end of the first branch pipe 21 is connected to the main pipe 10. In this embodiment, one end of the valve core 30 is assembled into the first branch pipe 21 through the assembly port 22 and can open and close the main pipe 10. The other end of the valve core 30 extends out of the assembly port 22 and is provided with a locking hole 31. The end cap 40 covers the assembly port 22 and has a locking hole 41 corresponding to the locking hole 31. The one-time locking assembly 50 includes a connector 51, which is configured to pass through both the locking hole 31 and the locking hole 41 simultaneously when the main pipe 10 is opened.

[0047] In this structure, the valve core 30 is directly installed into the first branch pipe 21 through the assembly port 22, improving installation efficiency. When the connector 51 of the one-time locking assembly 50 is simultaneously inserted into the locking hole 31 and the locking hole 41, the main pipe 10 is opened, allowing external water to pass through the main pipe 10 and enter the expansion tank. Therefore, operators can intuitively and quickly determine the valve's open / closed status based on the presence or damage of the connector 51, thereby improving operational efficiency and safety and reducing the rate of misoperation. Furthermore, the end cap 40 prevents dust from entering the valve core 30 and the gap between the valve core 30 and the first branch pipe 21 through the assembly port 22, thus ensuring the service life of the valve core 30 while preventing it from becoming stuck.

[0048] It should be noted that, as Figure 1 and Figure 2 , Figures 8-10 As shown, the first branch pipe 21 includes an external body 211 and an extension body 212 that are interconnected. An assembly port 22 is opened in the external body 211. The extension body 212 extends into the main pipe 10 and divides the main pipe 10 into an inlet section 11 and an outlet section 12. The inlet section 11 and the outlet section 12 are located on both sides of the extension body 212. An inlet port 27 and an outlet port 28 are respectively opened on the extension body 212. The inlet port 27 is connected to the inlet section 11, and the outlet port 28 is connected to the outlet section 12. A water passage hole 213 is formed in the middle of the extension body 212. The inlet port 27 and the outlet port 28 are located on both sides of the water passage hole 213. The valve core 30 can seal with the water passage hole 213 to open / close the main pipe 10. This design is not only simple in structure, but also allows the water passage 213 to be opened / closed by changing the position of the valve core 30, thereby cutting off the channel between the liquid inlet 27 and the liquid outlet 28, and thus opening / closing the main pipe 10 to ensure the smooth opening and closing of the valve.

[0049] Specifically, such as Figure 6 As shown, the end cap 40 includes a cap body 44, a first enclosure wall 42, and a second enclosure wall 43 connected to each other. The first enclosure wall 42 can be fitted onto the outer periphery of the valve core 30, and the second enclosure wall 43 can be fitted onto the outer periphery of the first branch pipe 21. The cap body 44 can abut against the end of the valve core 30 that protrudes from the assembly port 22, and a locking hole 41 is provided in the first enclosure wall 42. In this structure, the first enclosure wall 42 and the cap body 44 can completely cover the exposed part of the valve core 30 at the assembly port 22, while the second enclosure wall 43 can completely cover the outer periphery of the assembly port 22, thereby effectively isolating dust and preventing dust from entering the valve core 30 or the first branch pipe 21. In addition, the locking hole 41 can be directly opened on the first enclosure wall 42 during processing, thereby reducing the processing difficulty.

[0050] Furthermore, the locking hole 41 penetrates the side wall of the first enclosure 42, and the locking hole 31 penetrates the valve core 30. This arrangement not only facilitates the insertion of the disposable locking component 50 into the locking hole 31 and the locking hole 41, but also further improves the integration of the valve core 30 and the end cap 40, ensuring the stability of the valve core 30 and the end cap 40.

[0051] Specifically, such as Figures 2-6 As shown, the disposable locking assembly 50 also includes a disposable latch 52 capable of simultaneously locking at least a portion of the connector 51 into the locking hole 31 and the locking hole 41; the connector 51 is strip-shaped and includes a first end 511 and a second end 512, the first end 511 passing through both the locking hole 31 and the locking hole 41, and the disposable latch 52 locking the first end 511 and the second end 512. This design not only simplifies the specific structure of the one-time locking component 50, but also allows the first end 511 of the connector 51 to be quickly inserted when the locking hole 31 and the locking hole 41 are aligned. Finally, the first end 511 and the second end 512 of the connector 51 are locked by the one-time locking buckle 52, further improving the convenience of locking. At the same time, the presence of the one-time locking buckle 52 indicates that the valve core 30 is in the position to open the connecting valve, at which time the inlet port 27 and the outlet port 28 are in a connected state. When it is necessary to cut off the water flow, the operator needs to destroy the one-time locking buckle 52, pull out the connector 51 and remove the end cap 40, move the valve core 30 to the bottom of the first branch pipe 21 and block the water passage hole 213, thereby cutting off the water flow of the valve core 30 to close the main pipe 10.

[0052] Furthermore, such as Figures 2-6 As shown, the second end 512 surrounds the outside of the first branch pipe 21 and is close to the first end 511. The one-time locking buckle 52 simultaneously locks the first end 511 and the second end 512. The operator can insert the first end 511 into the locking hole 31 and the locking hole 41, and directly surround the outside of the first branch pipe 21 with the second end 512 to lock the first end 511 and the second end 512, thereby improving the convenience of operation. At this time, the one-time locking assembly 50 can fix the valve core 30 and the end cap 40 in the preset position, that is, the end cap 40 covers the assembly port 22, and the valve core 30 is in the position that connects the liquid inlet 27 and the liquid outlet 28. The operation is simple and convenient.

[0053] It should be noted that in this embodiment, the connector 51 is a lead-sealing wire; the one-time locking buckle 52 is a lead-sealing body. The lead-sealing wire can be shaped into any form according to actual needs, so one end can be inserted into the locking hole 31 and the locking hole 41, and the other end can be bent around the outside of the first branch pipe 21. Finally, the two ends are locked by the lead-sealing body, and the lead-sealing body cannot be removed after being locked, and can only be opened by breaking it. Therefore, the operator can quickly determine whether the valve core 30 is in the open or closed state by observing whether the lead-sealing body is damaged.

[0054] When it is necessary to cut off the main pipe 10, the disposable locking assembly 50 and end cap 40 need to be removed, and the valve core 30 needs to be moved to the bottom of the first branch pipe 21 and the water passage hole 213 needs to be blocked, thereby cutting off the water outlet of the liquid outlet section 12. For ease of operation, in this embodiment, the valve core 30 is axially movable and fixed inside the first branch pipe 21. The valve core 30 includes a first sealing body 32 and a second sealing body 34, which are spaced apart from each other along the axial direction of the valve core 30. The inner wall of the outer body 211 has a sealing section 214, and the first sealing body 32 is sealed and fitted with the sealing section 214, while the second sealing body 34 is sealed and fitted with the water passage hole 213. In this structure, when the valve is in the open state, only the first sealing body 32 and the sealing section 214 are in a sealing fit, so that water will not flow out from the assembly port 22 of the first branch pipe 21 while ensuring that the water passage 213 is connected to the liquid inlet 27 and the liquid outlet 28; when the valve is in the closed state, the second sealing body 34 can seal the water passage 213 (at this time, the first sealing body 32 and the sealing section 214 are still in a sealing fit), which not only cuts off the water flow, but also ensures a good sealing effect.

[0055] It should be noted that, in this embodiment, a first sealing groove is provided on the outer periphery of the first sealing body 32, and a second sealing groove is provided on the outer periphery of the second sealing body 34. A first sealing element 60 is provided in the first sealing groove, and a second sealing element 70 is provided in the second sealing groove. The first sealing element 60 and the second sealing element 70 respectively seal against the inner wall of the sealing section 214 and the water passage hole 213, thereby preventing liquid from leaking from the gap between the valve core 30 and the first branch pipe 21.

[0056] Furthermore, in this embodiment, both the first sealing element 60 and the second sealing element 70 are O-rings. O-rings have a simple structure, are inexpensive, and provide good sealing, which helps reduce manufacturing costs. In addition, both the first sealing groove and the second sealing groove are annular grooves, which not only facilitates the installation of the first sealing element 60 and the second sealing element 70 but also ensures their stability.

[0057] In addition, such as Figure 3 , Figure 4 and Figure 10 As shown, the valve core 30 also includes a threaded connector 33, which is located between the first sealing body 32 and the second sealing body 34; the first branch pipe 21 is also provided with a threaded section 215, which is located between the water passage hole 213 and the sealing section 214. The threaded connector 33 and the threaded section 215 are threadedly engaged, and the diameter of the first sealing body 32 is larger than the diameter of the threaded connector 33, and the diameter of the threaded connector 33 is larger than the diameter of the second sealing body 34.

[0058] This configuration allows the valve core 30 to form a threaded connection with the first branch pipe 21, facilitating installation and improving the flexibility and smoothness of switching the valve's opening and closing states. Furthermore, the diameter of the first sealing body 32 is larger than the diameter of the threaded connector 33; therefore, the diameter of the sealing section 214, which seals with the first sealing body 32, is also larger than the diameter of the threaded connector 33. Thus, the threads of the threaded connector 33 will not wear down the sealing section 214 during tightening. Additionally, the diameter of the second sealing body 34 is smaller than the diameter of the threaded connector 33; therefore, the diameter of the second sealing body 34 is smaller than the diameter of the threaded section 215, which mates with the threaded connector 33. This ensures that the second sealing body 34 will not be worn down by the threaded section 215.

[0059] Considering that the main pipe 10 will vibrate during operation, the valve core 30 will displace axially along the first branch pipe 21 under vibration, thus affecting the valve opening and the inlet and outlet flow rates. The threaded engagement between the threaded connector 33 and the threaded section 215 can prevent the valve core 30 from moving towards the water passage 213 due to vibration (a rotational torque is required for the valve core 30 to move towards the water passage 213), but there is still a possibility that the valve core 30 will move towards the assembly port 22, which will cause the valve opening to increase and affect the liquid supply.

[0060] To solve this problem, such as Figure 2 , Figure 3 as well as Figure 7 As shown, a limiting groove 23 is provided on the inner circumference of the first branch pipe 21. The limiting groove 23 is close to the assembly port 22, and a limiting element 80 is installed in the limiting groove 23 to limit the valve core 30 axially. This arrangement can provide a limit from the valve core 30, thereby preventing the valve core 30 from moving towards the assembly port 22 under vibration conditions, thus ensuring that the valve opening of the connected valve does not change and ensuring a good water supply effect.

[0061] Specifically, the first limiting end 81 of the limiting member 80 is located within the limiting groove 23, and the second limiting end 82 extends out of the limiting groove 23 and can abut against the limiting part to restrict the valve core 30 from moving along its own axis toward the assembly port 22. The second limiting end 82 can counteract the tendency of the valve core 30 to move toward the assembly port 22 by abutting against the limiting part. The other end of the valve core 30 is threadedly limited by the threaded connection body 33 and the threaded section 215, thereby ensuring that the vibration of the pipeline will not cause the valve core 30 to move, thereby ensuring that the valve opening does not change and ensuring the stability of the liquid output.

[0062] In addition, such as Figures 1-2 , Figures 8-9As shown, the connecting valve also includes a second branch pipe 24, which is connected to the outlet section 12. An on / off assembly is installed on the second branch pipe 24, which is typically used for sewage discharge. A connector 25 is fitted around the outer periphery of the second branch pipe 24, and a cap 26 is provided at the other end of the connector 25. When sewage discharge is required, the cap 26 is opened, and the on / off assembly is in the open state to connect to the external sewage discharge pipe. At this time, the cap 26 can be fixed by the connector 25 without the operator needing to hold it. After sewage discharge is completed, the on / off assembly is switched to the closed state, and the cap 26 can be put back on the second branch pipe 24.

[0063] In this embodiment, the connector 25 is made of flexible plastic, thereby improving flexibility and operability. Furthermore, the shut-off assembly can be any of a ball valve, gate valve, or globe valve; no specific limitation is made in this embodiment.

[0064] In summary, the connecting valve in this embodiment can not only intuitively and quickly determine the working status of the valve core 30, reducing the rate of misoperation, but also prevent the valve core 30 from shifting due to pipeline vibration, while the end cap 40 can also prevent dust from entering the valve core 30.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A connecting valve, characterized in that, include: The valve body includes a main pipe (10) and a first branch pipe (21) fixedly installed on the side of the main pipe (10). One end of the first branch pipe (21) is provided with an assembly port (22), and the other end of the first branch pipe (21) is connected to the main pipe (10). Valve core (30), one end of which is fitted into the first branch pipe (21) and can open and close the main pipe (10), and the other end of which extends out of the fitting port (22) and is provided with a locking hole (31). End cap (40) is provided on the assembly port (22), and the end cap (40) is provided with a locking hole (41) corresponding to the locking hole (31); A one-time locking assembly (50) includes a connector (51) configured to pass through both the locking holes (31) and the locking holes (41) simultaneously when the main tube (10) is opened.

2. The connecting valve according to claim 1, characterized in that, The end cap (40) includes a cover body (44), a first enclosure wall (42), and a second enclosure wall (43) connected to each other. The first enclosure wall (42) can be fitted onto the outer periphery of the valve core (30), and the second enclosure wall (43) is fitted onto the outer periphery of the first branch pipe (21). The cover body (44) can abut against one end of the valve core (30) that extends out of the assembly port (22). The locking hole (41) is provided in the first enclosure wall (42).

3. The connecting valve according to claim 2, characterized in that, The locking hole (41) penetrates the side wall of the first enclosure (42), and the locking hole (31) penetrates the valve core (30).

4. The connecting valve according to claim 3, characterized in that, The disposable locking assembly (50) further includes a disposable latch (52) capable of simultaneously locking at least a portion of the connector (51) to the locking hole (31) and the locking hole (41); the connector (51) is strip-shaped and includes a first end (511) and a second end (512), the first end (511) passing through both the locking hole (31) and the locking hole (41), and the disposable latch (52) locking the first end (511) and the second end (512).

5. The connecting valve according to claim 4, characterized in that, The second end (512) surrounds the outside of the first branch pipe (21) and is close to the first end (511), and the one-time lock (52) locks the first end (511) and the second end (512) at the same time.

6. The connecting valve according to claim 4, characterized in that, The connector (51) is a lead-sealed wire; the disposable lock (52) is a lead-sealed body.

7. The connecting valve according to any one of claims 1 to 6, characterized in that, The first branch pipe (21) includes an external body (211) and an extension body (212) that are interconnected. The assembly port (22) is opened in the external body (211). The extension body (212) extends into the main pipe (10) and divides the main pipe (10) into an inlet section (11) and an outlet section (12). The inlet section (11) and the outlet section (12) are respectively located on both sides of the extension body (212). The extension body (212) is respectively provided with... It has an inlet (27) and an outlet (28). The inlet (27) is connected to the inlet section (11), and the outlet (28) is connected to the outlet section (12). A water passage hole (213) is formed in the middle of the extension body (212). The inlet (27) and the outlet (28) are located on both sides of the water passage hole (213). The valve core (30) can seal with the water passage hole (213) to open / close the main pipe (10).

8. The connecting valve according to claim 7, characterized in that, The valve core (30) is axially movable and fixed inside the first branch pipe (21). The valve core (30) includes a first sealing body (32) and a second sealing body (34). The first sealing body (32) and the second sealing body (34) are spaced apart from each other along the axial direction of the valve core (30). The inner wall of the outer body (211) has a sealing section (214). The first sealing body (32) is sealed and fitted with the sealing section (214). The second sealing body (34) is sealed and fitted with the water passage hole (213).

9. The connecting valve according to claim 8, characterized in that, The valve core (30) also includes a threaded connector (33), which is located between the first sealing body (32) and the second sealing body (34); the first branch pipe (21) is also provided with a threaded section (215), which is located between the water passage hole (213) and the sealing section (214). The threaded connector (33) and the threaded section (215) are threadedly engaged, and the diameter of the first sealing body (32) is larger than the diameter of the threaded connector (33), and the diameter of the threaded connector (33) is larger than the diameter of the second sealing body (34).

10. The connecting valve according to claim 7, characterized in that, The connecting valve also includes a second branch pipe (24), which is connected to the liquid outlet section (12), and an on / off assembly is provided on the second branch pipe (24).

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