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 including 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;End cap is capped in assembly opening, and end cap is provided with perforation;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 is provided with locking portion, locking portion protrudes perforation, and locking portion is provided with locking hole;Disposable locking assembly includes plug-in part, plug-in part is configured as channel opening, can be worn in locking hole. The connecting valve can be intuitively judged whether valve is in opening or closing state, reduce misoperation rate, can avoid dust into valve core inside simultaneously, guarantee the service life of 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 connecting 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] An end cap is provided to cover the assembly port, and the end cap is provided with a through hole;

[0009] 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 is provided with a locking part, the locking part extending out of the through hole, and the locking part is provided with a locking hole;

[0010] A one-time locking assembly includes a connector configured to pass through the locking hole when the main pipe is opened.

[0011] Preferably, the end cap includes a cover body and a surrounding wall that are connected to each other, the perforation is provided in the cover body, the cover body can cover the assembly port, and the surrounding wall is sleeved on the outer periphery of the first branch pipe.

[0012] Preferably, there are two locking parts, and each locking part is symmetrically arranged. Each locking part corresponds to one through hole, and each locking part is provided with one locking hole. When the main pipe is opened, the plug-in is simultaneously inserted into the two locking holes.

[0013] Preferably, the disposable locking assembly further includes a disposable latch capable of simultaneously locking at least a portion of the connector into the two locking holes; the connector is strip-shaped, including a first end and a second end, the first end passing through both locking holes simultaneously, 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 the second branch pipe is provided with an on / off component.

[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. The end cap covers the assembly port and has a through hole. 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 has a locking part that extends out of the through hole and has a locking hole. The one-time locking assembly includes a connector, which is configured to pass through the locking hole when the main pipe is open.

[0022] When the connector of the one-time locking assembly is inserted into the locking hole, the passage is opened, allowing outside water to flow through the main pipe and into the expansion tank. Therefore, operators can quickly and intuitively 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 is secured by the locking assembly and locking part, preventing dust from entering the valve core and the gap between the valve core and the first branch pipe through the assembly port. This ensures the valve core's service life while preventing it from becoming stuck. 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 9This 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 part; 311. Locking hole; 32. First sealing body; 33. Threaded connection body; 34. Second sealing body;

[0037] 40. End cap; 41. Perforation; 42. Cap body; 43. Enclosure;

[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. The end cap 40 covers the assembly port 22, and one end of the end cap 40 is provided with a through hole 41. 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 is provided with a locking part 31, which extends out of the through hole 41, and the locking part 31 is provided with a locking hole 311. The one-time locking assembly 50 includes a connector 51, which is configured to be able to pass through the locking hole 311 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 inserted into the locking hole 311, 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 can be fixed by the one-time locking assembly 50 and the locking part 31, preventing 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. This ensures the service life of the valve core 30 while preventing the valve core 30 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 cover body 42 and a surrounding wall 43 connected to each other. A through hole 41 is provided in the cover body 42, which covers the assembly opening 22. The surrounding wall 43 is fitted around the outer periphery of the first branch pipe 21, and both the locking part 31 and the through hole 41 are arc-shaped. In this structure, the cover body 42 and the surrounding wall 43 can wrap around the outer periphery of the assembly opening 22, thereby effectively isolating dust and preventing dust from entering the first branch pipe 21. The arc-shaped locking part 31 not only increases the force-bearing area but also facilitates the opening of the locking hole 311 on the locking part 31, improving the ease of processing. At the same time, the arc-shaped through hole 41 facilitates the locking part 31 to pass directly through the through hole 41, improving the ease of installing the end cap 40.

[0050] Furthermore, such as Figure 4 and Figure 6As shown, there are two locking parts 31, and each locking part 31 is symmetrically arranged. Each locking part 31 corresponds to a through hole 41, and each locking part 31 is provided with a locking hole 311. When the main pipe 10 is opened, the connector 51 passes through both locking holes 311 simultaneously. This arrangement can further improve the connection effect between the locking part 31 and the end cover 40, thereby ensuring the stability of the connection and preventing the single locking part 31 from breaking due to excessive force, thus ensuring the service life of the valve core 30. At the same time, the symmetrical arrangement of the two locking parts 31 also ensures that the two locking holes 311 are aligned, which facilitates the installation of the one-time locking assembly 50.

[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 two locking holes 311; the connector 51 is strip-shaped and includes a first end 511 and a second end 512, the first end 511 passing through the two locking holes 311 simultaneously, 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 into the two opposing locking holes 311. 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 two locking holes 311, 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. Therefore, one end can be inserted into two opposing locking holes 311, 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. It 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, the valve core 30 can be axially 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 to the sealing section 214, while the second sealing body 34 is sealed to 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, low cost, and good sealing effect, which helps to 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 the stability of the first sealing element 60 and the second sealing element 70.

[0057] In addition, such as Figure 3 , Figure 4 and Figure 10As 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 8-9 As 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). An end cap (40) is provided to cover the assembly port (22), and a perforation (41) is provided on the end cap (40); A valve core (30) is installed at one end in the first branch pipe (21) and can open and close the main pipe (10). The other end of the valve core (30) is provided with a locking part (31), which extends out of the through hole (41) and is provided with a locking hole (311). A one-time locking assembly (50) includes a connector (51) configured to pass through the locking hole (311) 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 (42) and a surrounding wall (43) connected to each other. The perforation (41) is provided in the cover body (42). The cover body (42) covers the assembly port (22). The surrounding wall (43) is sleeved on the outer periphery of the first branch pipe (21).

3. The connecting valve according to claim 1, characterized in that, There are two locking parts (31), and each locking part (31) is symmetrically arranged. Each locking part (31) corresponds to a through hole (41), and each locking part (31) is provided with a locking hole (311). When the main tube (10) is opened, the plug (51) is simultaneously inserted into the two locking holes (311).

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) into the two locking holes (311); the connector (51) is strip-shaped and includes a first end (511) and a second end (512), the first end (511) passing through both locking holes (311) simultaneously, 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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