Through-wall valve

Abstract

The through-wall valve comprises a valve body, a valve rod and a valve element assembly, the valve body is provided with a valve cavity, a water inlet hole, a water outlet hole and an installation hole, the water inlet hole, the water outlet hole and the installation hole are communicated with the valve cavity, the water inlet hole and the installation hole are located in the two opposite ends of the valve body respectively, the valve rod is detachably fixed to the cavity wall of the valve cavity, one end of the valve rod is connected with the valve element assembly in a clamped mode, and the other end of the valve rod extends out of the installation hole. The valve element assembly can reciprocate in the axial direction of the valve rod so as to block or open the water inlet hole. A gasket assembly is arranged at the position, close to the mounting hole, of the valve cavity, the gasket assembly is arranged on the valve rod in a sleeving mode, sealing is formed between the valve body and the valve rod, the valve rod is provided with an abutting-pushing part, and the abutting-pushing part is arranged at the position close to the mounting hole and located on the side, away from the water outlet hole, of the gasket assembly. The through-wall valve is more convenient to maintain and safer to operate, and the through-wall valve is prevented from being detached from the outside of the wall of the high-rise building.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a through-wall valve. Background Technology

[0002] Through-wall valves need to be installed through a wall, with one end of the valve body installed inside the wall and the other end installed outside. Traditionally, when internal components of the valve body are damaged and require repair, operators typically disassemble the through-wall valve from the inlet side, i.e., from the outside of the wall. However, for some through-wall valves installed on high-rise buildings, disassembly from the outside of the wall is difficult and compromises operational safety. Summary of the Invention

[0003] The purpose of this application is to solve the problems mentioned in the background art and to provide a through-wall valve.

[0004] To achieve the above objectives, the technical solution of this application is as follows:

[0005] A through-wall valve includes a valve body, a valve stem, and a valve core assembly. The valve body has a valve cavity and an inlet, an outlet, and a mounting hole communicating with the valve cavity. The inlet and the mounting hole are located at opposite ends of the valve body. The valve stem is detachably fixed to the cavity wall of the valve cavity. One end of the valve stem is engaged with the valve core assembly, and the other end of the valve stem extends out of the mounting hole. The valve core assembly can reciprocate along the axial direction of the valve stem to block or open the inlet.

[0006] The valve cavity has a gasket assembly near the mounting hole. The gasket assembly is sleeved on the valve stem and forms a seal between the valve body and the valve stem. The valve stem has a push part, which is located near the mounting hole and on the side of the gasket assembly away from the outlet hole.

[0007] Understandably, by attaching the valve core assembly to the valve stem and providing a pusher on the valve stem, when the through-wall valve needs maintenance, the operator can pull out the valve stem from the mounting hole side. During disassembly, the valve stem can be removed along with the valve core assembly and the gasket assembly. Furthermore, when only the gasket assembly needs to be replaced, the operator can pull out only part of the valve stem, use the pusher to push the gasket assembly, and bring the gasket assembly out of the mounting hole. This makes maintenance more convenient, avoids disassembling the through-wall valve from the outside of the high-rise building, and makes the operation safer.

[0008] In one embodiment, the pushing portion protrudes outward in the radial direction of the valve stem, and the pushing portion is configured as an annular structure.

[0009] Understandably, this design increases the contact area between the pusher and the gasket assembly, making disassembly easier.

[0010] In one embodiment, the valve core assembly includes a claw, the valve stem has an inwardly formed guide hole, the guide hole wall protrudes and forms a locking portion, the claw can extend into the guide hole and slide relative to the guide hole wall, and the claw can abut against the locking portion to limit the travel of the valve core assembly away from the valve stem along the axial direction of the guide hole.

[0011] Understandably, when installing the valve core assembly, the claws are inserted into the guide hole and engaged with the locking part to complete the connection between the valve core assembly and the valve stem. The installation is convenient, and the valve core assembly will not detach from the valve stem during disassembly.

[0012] In one embodiment, the valve core assembly further includes a fastener and a sealing gasket, the fastener passing through the sealing gasket and screwed to the jaws to secure the sealing gasket to the jaws.

[0013] Understandably, the sealing gasket and the claw are fixed together by fasteners, so that the valve core assembly is assembled as a whole. This makes it easier to remove the valve core assembly as a whole during disassembly.

[0014] In one embodiment, the valve core assembly is provided with a sealing ring, which is located between the claw and the wall of the guide hole.

[0015] Understandably, this design prevents water from entering the guide hole through the gap between the chuck and the guide hole wall when the valve core assembly blocks the water inlet.

[0016] In one embodiment, the through-wall valve further includes a handwheel, a connector, and a pressure cap. The connector passes through the handwheel and is screwed to the valve stem to fix the handwheel relative to the valve stem. The pressure cap is threaded to the wall of the mounting hole, and a preset gap is formed between the handwheel and the pressure cap.

[0017] Understandably, the handwheel and valve stem are connected by a threaded connector to facilitate disassembly, and the pre-set gap provides assembly space for handwheel disassembly and assembly, making handwheel disassembly easier.

[0018] In one embodiment, an elastic retaining ring is fitted on the valve stem, and a groove is formed on the outer wall of the valve stem. The elastic retaining ring can abut against the gasket assembly and engage with the groove wall, and the pressure cap abuts against the elastic retaining ring.

[0019] It is understandable that an elastic retaining ring is used to limit the axial movement of the valve stem and to facilitate disassembly.

[0020] In one embodiment, the valve stem has a drain hole and a drain channel formed inward. The guide hole, the drain channel and the drain hole are connected in sequence. The drain hole is located between the gasket assembly and the handwheel, and the drain hole is connected to the preset gap, so that the water flowing into the guide hole can flow through the drain channel and the drain hole in sequence, and be discharged from the preset gap.

[0021] Understandably, the water flowing into the guide hole can be discharged from the valve body through the preset gap, preventing water from accumulating in the valve stem and improving the performance of the through-wall valve.

[0022] In one embodiment, the valve stem includes a main body section and a connecting section, one end of the connecting section is welded and fixed to the main body section, and the other end of the connecting section is connected to the valve core assembly;

[0023] The pushing part is located on the main body section.

[0024] Understandably, the valve stem is formed by welding the main body section and the connecting section, resulting in a more reliable connection.

[0025] In one embodiment, a plurality of protrusions are formed on the outer peripheral wall of the connecting segment, the plurality of protrusions are arranged at circumferential intervals along the connecting segment, and the protrusions abut against the cavity wall of the valve cavity.

[0026] Understandably, the boss provides circumferential support for the connecting section within the valve cavity and can radially limit the valve stem, making the valve stem more stable during operation.

[0027] The effect of this application:

[0028] This application claims a through-wall valve that, by snapping a valve core assembly onto a valve stem and providing a pusher on the valve stem, allows the operator to pull out the valve stem from the mounting hole side when the through-wall valve needs maintenance. During disassembly, the valve stem can be removed along with the valve core assembly and gasket assembly. Furthermore, when only the gasket assembly needs to be replaced, the operator can pull out only part of the valve stem, use the pusher to push the gasket assembly, and bring the gasket assembly out of the mounting hole. This makes maintenance more convenient, avoids disassembling the through-wall valve from the outside of the high-rise building wall, and enhances operational safety. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1A perspective view of a wall-penetrating valve provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of a wall-penetrating valve provided in an embodiment of this application;

[0032] Figure 3 for Figure 2 Sectional view at point AA;

[0033] Figure 4 A perspective view of a connection segment provided in an embodiment of this application;

[0034] Figure 5 This is a perspective view of a chuck provided in an embodiment of this application.

[0035] Reference numerals: 100, through-wall valve; 10, valve body; 11, first main body; 111, inlet hole; 12, second main body; 121, mounting hole; 122, outlet hole; 123, pressure relief hole; 13, through-wall pipe; 14, gasket assembly; 141, first gasket; 142, second gasket; 143, third gasket; 15, valve cavity; 16, pressure cap; 20, valve stem; 21, connecting section; 211, guide hole; 212. 213. Snap-fit ​​part; 214. Boss; 22. Return spring; 22. Main body section; 221. Pushing part; 222. Drain channel; 223. Drain hole; 23. Handwheel; 231. Connector; 232. Preset gap; 24. Elastic retaining ring; 30. Valve core assembly; 31. Fastener; 32. Sealing gasket; 33. Pressure plate; 34. Irregular gasket; 35. Claw; 351. Groove; 36. Sealing ring; 40. Pressure relief assembly. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly 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 and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0041] Please see Figures 1 to 3An embodiment of this application provides a through-wall valve 100, including a valve body 10, a valve stem 20, and a valve core assembly 30. The valve body 10 has a valve cavity 15 and an inlet hole 111, an outlet hole 122, and a mounting hole 121 communicating with the valve cavity 15. The inlet hole 111 and the mounting hole 121 are located at opposite ends of the valve body 10, respectively. The valve stem 20 is detachably fixed to the valve cavity 15. One end of the valve stem 20 is engaged with the valve core assembly 30, and the other end of the valve stem 20 extends out of the mounting hole 121. The valve core assembly 30 can reciprocate along the axial direction of the valve stem 20 to block or open the inlet hole 111. The valve chamber 15 has a gasket assembly 14 near the mounting hole 121. The gasket assembly 14 is fitted onto the valve stem 20 and forms a seal between the valve body 10 and the valve stem 20. The valve stem 20 has a pusher portion 221, which is located near the mounting hole 121 and on the side of the gasket assembly 14 away from the outlet hole 122. Thus, when the through-wall valve 100 needs maintenance, the operator can pull out the valve stem 20 from the mounting hole 121 side. During disassembly, the valve stem 20 can be removed along with the valve core assembly 30 and the gasket assembly 14. Furthermore, when only the gasket assembly needs replacement, the operator can pull out only part of the valve stem 20, use the pusher portion 221 to push the gasket assembly 14, and bring the gasket assembly 14 out of the mounting hole 121. This makes maintenance more convenient, avoids disassembling the through-wall valve 100 from outside the wall of a high-rise building, and makes operation safer.

[0042] In this embodiment, the valve body 10 includes a first body 11, a second body 12, and a wall-penetrating pipe 13. Both ends of the wall-penetrating pipe 13 are connected to and communicate with the first body 11 and the second body 12, respectively. The valve core assembly 30 is located within the first body 11. The wall-penetrating pipe 13 has a certain length and passes through the wall when the wall-penetrating valve 100 is installed. An inlet hole 111 is opened in the first body 11, and an outlet hole 122 and a mounting hole 121 are opened in the second body 12. Fluid introduced into the inlet hole 111 can flow sequentially through the first body 11, the wall-penetrating pipe 13, and the second body 12, and then flow out through the outlet hole 122.

[0043] In this embodiment, the gasket assembly 14 includes a first gasket 141, a second gasket 142, and a third gasket 143. The second gasket 142 is sandwiched between the first gasket 141 and the third gasket 143. Both the first gasket 141 and the third gasket 143 are made of stainless steel, while the second gasket 142 is made of rubber. The gasket assembly 14 is installed near the mounting hole 121 to prevent water from leaking from the mounting hole 121 when the water inlet hole 111 is open.

[0044] In one embodiment, the valve stem 20 has an inwardly formed guide hole 211 and a drain channel 222, and a drain hole 223 is also provided on the valve stem 20. The guide hole 211, the drain channel 222 and the drain hole 223 are sequentially connected. The drain hole 223 is located between the gasket assembly 14 and the handwheel 23, and the drain hole 223 is connected to a preset gap 232. With this configuration, when the sealing ring 36 fails to seal, the water flowing into the guide hole 211 can flow sequentially through the drain channel 222 and the drain hole 223, and be discharged from the preset gap 232, preventing water from accumulating in the valve stem 20 and improving the performance of the through-wall valve 100. In addition, the valve stem 20 has a hollow structure, which reduces weight, saves material costs, and makes disassembly and removal easier.

[0045] In this embodiment, a return spring 214 is provided in the guide hole 211. The return spring 214 is pre-compressed and abuts against the connecting section 21 and the valve core assembly 30. When water is introduced from the water inlet hole 111, the valve core assembly 30 compresses the return spring 214 and opens the water inlet hole 111 under the action of water pressure. When the water pressure disappears, the valve core assembly 30 blocks the water inlet hole 111 under the action of the elastic restoring force of the return spring 214.

[0046] In one embodiment, a pressure cap 16 is provided on the valve body 10. The pressure cap 16 is threaded to the wall of the mounting hole 121 and can cooperate with the cavity wall of the valve cavity 15 to limit the gasket assembly 14 within the valve body 10.

[0047] In one embodiment, the valve stem 20 includes a main body section 22 and a connecting section 21. The axis of the main body section 22 and the axis of the connecting section 21 are on the same straight line. The connecting section 21 is partially located inside the first main body 11, and the main body section 22 passes through the second main body 12 and partially extends out of the mounting hole 121. One end of the connecting section 21 is abutted against and welded to the outer wall of the main body section 22, making the connection more reliable. The other end of the connecting section 21 is connected to the valve core assembly 30. A guide hole 211 is located in the connecting section 21, the valve core assembly 30 is connected to the connecting section 21, a pushing part 221 is located on the outer peripheral wall of the main body section 22, and a drain channel 222 and a drain hole 223 are provided in the main body section 22.

[0048] like Figure 3 and Figure 4 As shown, furthermore, multiple bosses 213 are formed on the outer peripheral wall of the connecting section 21. The multiple bosses 213 are arranged at intervals along the circumference of the connecting section 21, and the bosses 213 abut against the cavity wall of the valve cavity 15. The bosses 213 provide circumferential support for the connecting section 21 within the valve cavity 15 and can radially limit the valve stem 20, making the valve stem 20 more stable during operation. During operation, the water flow introduced from the water inlet hole 111 can flow through the gaps between the bosses 213, facilitating water flow; when the valve stem 20 is disassembled, the valve stem 20 can be pulled out, causing the bosses 213 to slide relative to the cavity wall of the valve cavity 15.

[0049] In this embodiment, the pushing part 221 protrudes outward in the radial direction of the valve stem 20, and the pushing part 221 is configured as an annular structure and arranged around the circumferential direction of the valve stem 20. In this way, the contact area between the pushing part 221 and the gasket assembly 14 is increased, which facilitates disassembly.

[0050] Not limited to this, in other embodiments, the push portion 221 may also be configured as a plurality of protrusions spaced apart along the circumferential direction of the valve stem 20.

[0051] In one embodiment, a handwheel 23 is mounted on the end of the valve stem 20 away from the valve core assembly 30. One end of the main body section 22 extends into the handwheel 23, and a connecting piece 231 passes through the handwheel 23 and is screwed onto the valve stem 20 to fix the handwheel 23 relative to the valve stem 20, facilitating the disassembly of the handwheel 23. A preset gap 232 is formed between the handwheel 23 and the pressure cap 16 along the radial direction of the mounting hole 121. The preset gap 232 provides assembly space for the disassembly and assembly of the handwheel 23, making disassembly of the handwheel 23 more convenient. Specifically, the connecting piece 231 is configured as a screw or bolt.

[0052] In one embodiment, an elastic retaining ring 24 is fitted onto the valve stem 20. A groove is formed on the outer wall of the valve stem 20, allowing the elastic retaining ring 24 to abut against the gasket assembly 14 and engage with the groove wall. The pressure cap 16 abuts against the elastic retaining ring 24. The elastic retaining ring 24 restricts the axial movement of the valve stem 20 and is easy to disassemble. The outer ring of the elastic retaining ring 24 is positioned between the gasket assembly 14 and the pressure cap 16, while the inner ring is positioned within the groove, thus achieving a fixed installation of the valve stem 20 within the valve body 10. When disassembly is required, the handwheel 23, pressure cap 16, and elastic retaining ring 24 are removed sequentially, and then the valve stem 20 is pulled out.

[0053] like Figure 3 and Figure 5 As shown, in one embodiment, the valve core assembly 30 includes a claw 35. The guide hole 211 has a protruding wall with a locking portion 212. The claw 35 can extend into the guide hole 211 and slide relative to the wall of the guide hole 211. The claw 35 can abut against the locking portion 212 to limit the travel of the valve core assembly 30 away from the valve stem 20 along the axial direction of the guide hole 211. It can be understood that the claw 35 has multiple grooves 351 spaced apart along its circumferential direction, giving the claw 35 a certain degree of elasticity. When installing the valve core assembly 30, the claw 35 is inserted into the guide hole 211 and engaged with the locking portion 212 to complete the connection between the valve core assembly 30 and the valve stem 20. The installation is convenient, and the valve core assembly 30 will not detach from the valve stem 20 during disassembly.

[0054] In this embodiment, the valve core assembly 30 further includes a fastener 31 and a sealing gasket 32. The fastener 31 passes through the sealing gasket 32 ​​and is screwed onto the retainer 35 to fix the sealing gasket 32 ​​to the retainer 35, so that the valve core assembly 30 is assembled as a whole. This makes it easier to remove the valve core assembly 30 as a whole during disassembly. The fastener 31 is specifically configured as a screw or bolt.

[0055] Furthermore, the valve core assembly 30 also includes a pressure plate 33 and a shaped gasket 34. The pressure plate 33 and the shaped gasket 34 are located between the claw 35 and the sealing gasket 32. The fastener 31 passes through the sealing gasket 32, the pressure plate 33 and the shaped gasket 34 in sequence and is threadedly connected to the claw 35.

[0056] In one embodiment, a sealing ring 36 is provided on the valve core assembly 30. The sealing ring 36 is located between the claw 35 and the wall of the guide hole 211. This arrangement ensures that when the valve core assembly 30 blocks the water inlet hole 111, the sealing ring 36 forms a seal between the claw 35 and the wall of the guide hole 211, preventing water from entering the guide hole 211 through the gap between the claw 35 and the wall of the guide hole 211. If too much water accumulates in the guide hole 211, it may freeze at low temperatures, affecting the normal operation of the through-wall valve 100.

[0057] In one embodiment, the through-wall valve 100 further includes a pressure relief assembly 40. A pressure relief hole 123 is formed on the valve body 10, and the pressure relief assembly 40 is installed in the pressure relief hole 123 for adjusting the internal and external pressures of the through-wall valve 100. The structure of the pressure relief assembly 40 is conventional technology and will not be described in detail here.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A wall bushing, characterized in that, The valve (100) comprises a valve body (10), a valve rod (20) and a valve core assembly (30), the valve body (10) has a valve cavity (15), a water inlet hole (111), a water outlet hole (122) and a mounting hole (121) which are communicated with the valve cavity (15), the water inlet hole (111) and the mounting hole (121) are respectively located at opposite ends of the valve body (10), the valve rod (20) is detachably fixed to a cavity wall of the valve cavity (15), one end of the valve rod (20) is connected with the valve core assembly (30), the other end of the valve rod (20) extends out of the mounting hole (121), and the valve core assembly (30) can reciprocate along the axial direction of the valve rod (20) to block or open the water inlet hole (111). The valve cavity (15) is provided with a gasket assembly (14) near the mounting hole (121), the gasket assembly (14) is sleeved on the valve rod (20) and forms a seal between the valve body (10) and the valve rod (20), the valve rod (20) has a pushing part (221) which is arranged near the mounting hole (121) and located on the side of the gasket assembly (14) away from the water outlet hole (122).

2. A wall bushing according to claim 1, characterized in that The pushing part (221) protrudes outward in the radial direction of the valve rod (20), and the pushing part (221) is arranged in an annular structure.

3. A wall bushing according to claim 1, characterized in that The valve core assembly (30) comprises a clamping jaw (35), the valve rod (20) is formed with a guide hole (211) inwardly, the hole wall of the guide hole (211) protrudes and is formed with a clamping part (212), the clamping jaw (35) can extend into the guide hole (211) and can slide relative to the hole wall of the guide hole (211), and the clamping jaw (35) can abut against the clamping part (212) to limit the stroke of the valve core assembly (30) away from the valve rod (20) in the axial direction of the guide hole (211).

4. A wall bushing according to claim 3, characterized in that The valve core assembly (30) further comprises a fastener (31) and a sealing gasket (32), the fastener (31) passes through the sealing gasket (32) and is screwed with the clamping jaw (35) to fix the sealing gasket (32) to the clamping jaw (35).

5. A wall bushing according to claim 4, characterized in that The valve core assembly (30) is provided with a sealing ring (36) between the clamping jaw (35) and the hole wall of the guide hole (211).

6. A wall bushing according to claim 3, characterized in that The wall-penetrating valve (100) further comprises a hand wheel (23), a connecting piece (231) and a pressing cap (16), the connecting piece (231) passes through the hand wheel (23) and is screwed with the valve rod (20) to fix the hand wheel (23) relative to the valve rod (20), the pressing cap (16) is threadedly connected with the hole wall of the mounting hole (121), and a preset gap (232) is formed between the hand wheel (23) and the pressing cap (16).

7. A wall bushing according to claim 6, characterized in that An elastic check ring (24) is sleeved on the valve rod (20), an outer wall of the valve rod (20) is provided with a clamping groove, the elastic check ring (24) can abut against the gasket assembly (14) and is in clamping fit with the groove wall of the clamping groove, and the pressing cap (16) abuts against the elastic check ring (24).

8. A wall bushing according to claim 6, characterized in that The valve rod (20) is provided with a water leakage hole (223) and is formed with a water leakage channel (222) inwardly, the guide hole (211), the water leakage channel (222) and the water leakage hole (223) are sequentially communicated, the water leakage hole (223) is located between the gasket assembly (14) and the hand wheel (23), and the water leakage hole (223) is communicated with the preset gap (232), so that the fluid flowing into the guide hole (211) can sequentially flow through the water leakage channel (222) and the water leakage hole (223) and is discharged from the preset gap (232).

9. A wall bushing according to claim 1, characterized in that The valve rod (20) comprises a main body section (22) and a connecting section (21), one end of the connecting section (21) is welded and fixed with the main body section (22), and the other end of the connecting section (21) is connected with the valve core assembly (30). The abutting and pushing part (221) is located on the main body section (22).

10. A wall bushing according to claim 9, characterized in that A plurality of bosses (213) are arranged on the outer peripheral wall of the connecting section (21), the plurality of bosses (213) are arranged at intervals along the circumference of the connecting section (21), and the bosses (213) abut against the cavity wall of the valve cavity (15).

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