Pipe valve anti-drop connecting structure

Abstract

The utility model relates to a pipeline connecting structure, in particular to a pipe valve anti-drop connecting structure which comprises a valve body and an anti-drop assembly, the valve body is provided with a connecting end, a connecting hole is formed in the connecting end, and the anti-drop assembly comprises a limiting sleeve and an anti-drop ring located in the limiting sleeve. The limiting sleeve comprises a sleeve body and a baffle ring fixedly connected to the sleeve body, a through groove is formed in the side wall of the sleeve body, the anti-disengaging ring comprises an opening ring body and locking arms fixedly connected to the two ends of the opening ring body respectively, the two locking arms are both inserted into the through groove in a penetrating mode and extend to the outside of the limiting sleeve, and the limiting sleeve and the anti-disengaging ring are fixedly connected to the two ends of the opening ring body respectively. And a fastener for oppositely pressing the two locking arms is arranged between the two locking arms. And by arranging the locking arms, the anti-falling ring can be tightly held on the pipeline after being moved to the position needing to be locked, the anti-falling teeth cannot move in the axial direction of the pipeline in the locking process, and the anti-falling effect is relatively good.

Description

Technical Field

[0001] This utility model relates to a pipe connection structure, and more particularly to a pipe valve anti-detachment connection structure. Background Technology

[0002] In drainage or water supply networks, connecting valves or expansion valves are usually used to connect two pipes. Pipes and various functional valves also need to be connected. These connection points are usually equipped with anti-detachment structures to prevent pipes or functional valves from separating or misaligning under external forces, which could cause leaks.

[0003] Traditional anti-detachment structures for pipelines typically utilize a clamping conical surface for fastening. Examples include the elastic metal pressure ring used in a bidirectional pipeline anti-detachment joint disclosed in Chinese Utility Model Patent No. CN206175894U, the tensioning pressure ring for an anti-detachment joint disclosed in Chinese Utility Model Patent No. CN211693893U, and a pipeline anti-detachment connection component disclosed in Chinese Utility Model Patent No. CN216666794U. During installation, the anti-detachment teeth (or anti-detachment grooves) in contact with the pipeline inevitably move along the axial direction of the pipeline due to the locking thrust, making the anti-detachment teeth easily bent or worn, thus affecting the anti-detachment effect.

[0004] In view of this, the applicant has conducted in-depth research on the anti-detachment connection structure of pipe valves, which led to this case. Utility Model Content

[0005] The purpose of this invention is to provide a valve anti-detachment connection structure with relatively good anti-detachment effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A valve anti-disengagement connection structure includes a valve body and an anti-disengagement component. The valve body has a connection end with a connection hole for inserting a pipe. The anti-disengagement component includes a limiting sleeve fixedly or detachably connected to the valve body and an anti-disengagement ring located within the limiting sleeve. The limiting sleeve includes a sleeve body with one end facing the connection hole and a retaining ring fixedly connected to the end of the sleeve body away from the connection hole. A through groove is provided on the side wall of the sleeve body. The anti-disengagement ring includes an open ring body and locking arms fixedly connected to both ends of the open ring body. Both locking arms are inserted into the through groove and extend to the outside of the limiting sleeve. A fastener is provided between the two locking arms to press the two locking arms together.

[0008] As an improvement of this utility model, the inner wall of the connecting hole is provided with a sealing element for sealing the pipe.

[0009] As an improvement of this utility model, the inner sidewall of the open ring body is provided with anti-detachment teeth or anti-detachment texture, and the inner sidewall and / or outer sidewall of the open ring body are provided with partition grooves.

[0010] As an improvement of this utility model, the fastener is a fastening bolt.

[0011] As an improvement of this utility model, the sleeve is integrally connected to the valve body.

[0012] As an improvement of this utility model, at least two protrusions are fixedly connected to the outer side wall of the open ring body, and the retaining ring is provided with through grooves that respectively cooperate one-to-one with each of the protrusions and inlet grooves that cooperate with the connecting arm. The inlet grooves extend to the sleeve body and communicate with the through groove.

[0013] As an improvement of this utility model, the sleeve is fitted onto the connecting end, and a set screw hole is provided on the side wall of the sleeve, and a set screw is screwed onto the set screw hole and abuts against the connecting end.

[0014] As an improvement of this utility model, an anti-loosening groove is provided on the outer side wall of the connecting end to cooperate with the set bolt.

[0015] As an improvement of this utility model, the sleeve is fitted onto the connecting end, and a hook is fixedly connected to the sleeve. A groove that mates with the hook is provided on the outer side wall of the connecting end.

[0016] As an improvement of this utility model, the anti-detachment groove or the locking groove is an annular groove, and a slot for cooperating with the set bolt or the locking hook is provided on the side wall of the annular groove facing the retaining ring.

[0017] As an improvement of this utility model, a positioning block is fixedly connected to the annular groove at a position next to the slot.

[0018] As an improvement of this utility model, it also includes a pressure sleeve that is detachably connected to the limiting sleeve, and the pressure sleeve is detachably connected to the valve body.

[0019] As an improvement of this utility model, it also includes a pressure sleeve, and the connecting end is also provided with a countersunk hole arranged coaxially with the connecting hole. A sealing element is provided in the countersunk hole, one end of the pressure sleeve abuts against the sealing element, and the other end is detachably connected to the limiting sleeve.

[0020] By adopting the above solution, this utility model has the following beneficial effects:

[0021] 1. By setting a locking arm, the anti-loosening ring can be moved to the position where it needs to be locked and then clamped onto the pipe. During the locking process, the anti-loosening teeth will not move axially in the pipe, and the anti-loosening effect is relatively good.

[0022] 2. By creating partition grooves on the inner and / or outer walls of the open ring, the elasticity or flexibility of the anti-detachment ring can be increased, making it suitable for pipes of more different diameters.

[0023] 3. Using hooks or set bolts to achieve a detachable connection between the limit sleeve and the valve body not only helps to improve the speed of disassembly and assembly, but also has a relatively low cost. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the anti-detachment connection structure of the pipe valve in Example 1;

[0025] Figure 2 This is a schematic diagram of the anti-detachment ring structure in Example 1;

[0026] Figure 3 This is a schematic diagram of the anti-detachment connection structure of the pipe valve in Example 2;

[0027] Figure 4 This is an exploded view of the anti-detachment connection structure of the pipe valve in Example 2;

[0028] Figure 5 This is a schematic diagram of the anti-detachment connection structure of the pipe valve in Example 3;

[0029] Figure 6 This is a schematic diagram of the anti-detachment connection structure of the pipe valve in Example 4;

[0030] Figure 7 This is a cross-sectional schematic diagram of the anti-detachment connection structure of the pipe valve in Example 4;

[0031] Figure 8 This is an exploded view of the anti-detachment connection structure of the pipe valve in Example 4;

[0032] Figure 9 This is a schematic diagram of the anti-detachment connection structure of the pipe valve in Example 5;

[0033] Figure 10 This is a schematic diagram of the anti-detachment connection structure of the pipe valve in Example 6;

[0034] Figure 11 This is a cross-sectional schematic diagram of the anti-detachment connection structure of the pipe valve in Example 6.

[0035] The corresponding markings in the diagram are as follows:

[0036] 10-Valve body; 11-Connection hole;

[0037] 12-Seal; 13-Anti-detachment groove;

[0038] 14-Slot; 15-Locking block;

[0039] 16-Connecting ear; 17-Card slot;

[0040] 20-Limiting sleeve;

[0041] 21-Sleeve body; 22-Retaining ring;

[0042] 23-Through groove; 24-Through groove;

[0043] 25 - Inlet / outlet groove; 26 - Set thread hole;

[0044] 27-Hook; 28-Panel;

[0045] 30 - Anti-detachment ring; 31 - Open ring body;

[0046] 32-Locking arm; 33-Through hole;

[0047] 34 - Protrusion; 35 - Partition groove;

[0048] 40 - Pressure sleeve; 41 - Annular groove;

[0049] 42 - Connecting threaded hole; 43 - Connecting smooth hole. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] Example 1

[0052] like Figure 1 and Figure 2 As shown, this embodiment provides a pipe valve anti-disconnection connection structure, including a valve body 10 and an anti-disconnection component. The valve body 10 can be the body of a pipe connection valve, the valve body of a functional valve such as a gate valve or a throttle valve, or the housing of a detection device such as a water meter or a pressure gauge. In this embodiment, the valve body is taken as the body of a pipe connection valve for illustration.

[0053] The valve body 10 has a connection end for connecting to a pipeline. This connection end refers not only to the end face but also to the portion of the valve body 10 near the end face. It should be noted that the valve body 10 may have multiple connection ends, each connecting to different pipelines. The connection structures between each connection end and the pipeline can be the same or different. In this embodiment, the valve body 10 has two connection ends. One connection segment uses a conventional flange connection structure to connect to the pipeline, which will not be described in detail here. This embodiment mainly describes the connection structure of the other connection end; therefore, the connection ends mentioned below refer to those without flange connections.

[0054] The connecting end has a connecting hole 11 for inserting a pipe, and a sealing element 12 for sealing the pipe is provided on the inner side wall of the connecting hole, that is, the sealing element 12 is located between the inner side wall of the connecting hole 11 and the outer side wall of the pipe. The structure of the sealing element 12 and its installation structure are existing structures. This embodiment adopts the sealing ring structure in the pipe anti-detachment connection structure disclosed in Chinese Utility Model Patent Publication No. CN219510345U, which will not be described in detail here.

[0055] The anti-detachment component includes a limiting sleeve 20 fixedly or detachably connected to the valve body 10, and an anti-detachment ring 30 located within the limiting sleeve 20. The limiting sleeve 20 includes a sleeve body 21 with one end facing the connecting hole 11, and a retaining ring 22 integrally connected to the end of the sleeve body 21 away from the connecting hole 11. In this embodiment, the sleeve body 21 is integrally connected to the valve body 10 (i.e., fixedly connected by an integral connection), meaning the sleeve body 21 and the valve body 10 are two different parts of the same component. This allows them to be obtained through a single casting process, resulting in relatively low cost. It should be noted that although the sleeve body 21 and the valve body 10 are integrally connected, the diameter of the inner hole of the sleeve body 21 needs to be larger than the diameter of the connecting hole 11 to accommodate the anti-detachment ring 20. A through groove 23 is provided on the side wall of the sleeve 21. The anti-detachment ring 30 includes an open ring 31 and locking arms 32 fixedly connected to the two ends of the open ring 31. The outer diameter of the open ring 31 is larger than the diameter of the connecting hole 11 so that the end of the connecting end can hold the open ring 31 and prevent the open ring 31 from sliding into the connecting hole 11. The two locking arms 32 are inserted in the through groove 23 and extend to the outside of the limiting sleeve 20. A fastener (not shown in the figure) is provided between the two locking arms 32 to press the two locking arms 32 together. In use, the pipe is inserted into the open ring 31 and the connecting hole 11 at the same time. The fastener presses the two locking arms 32 together, which drives the two ends of the open ring 31 to move towards each other, so that the open ring 31 holds the pipe tightly and achieves anti-detachment.

[0056] Preferably, in order to improve the anti-detachment effect, in this embodiment, the inner sidewall of the open ring 31 is provided with anti-detachment teeth or anti-detachment texture.

[0057] Preferably, the fastener is a fastening bolt. Specifically, each locking arm 32 has a through hole 33, and the fastening bolt is inserted into each through hole 33. A nut is screwed onto the fastening bolt, and the two locking arms 32 are clamped between the nut and the nut of the fastening bolt. In this way, the two locking arms 32 can be pressed together by tightening the nut, so that the open ring 31 clamps the pipe. Of course, a through hole can also be opened on one of the locking arms 32, and a locking threaded hole coaxially arranged with the through hole can be opened on the other locking arm 32. The fastening bolt is inserted into the through hole and screwed onto the locking threaded hole, and the nut of the fastening bolt abuts against the locking arm 32 with the through hole. In this way, the two locking arms 32 can be pressed together by simply rotating the fastening bolt.

[0058] In addition, to facilitate the insertion of the anti-detachment ring 30 into the limiting sleeve 20 during use, in this embodiment, at least two protrusions 34 are fixedly connected to the outer wall of the open ring body 31. The retaining ring 22 is provided with through grooves 24 that respectively cooperate with each protrusion 34 one-to-one and inlet / outlet grooves 25 that cooperate with the two connecting arms 32. The inlet / outlet groove 25 extends to the sleeve body 21 and communicates with the through groove 23. The inlet / outlet groove 25 passes through both the retaining ring 22 and the sleeve body 21. The side of the inlet / outlet groove 25 away from the retaining ring 22 is flush with the side of the through groove 23 away from the retaining ring 22, and the length of the inlet / outlet groove 25 is greater than the length of the through groove 23. The outer diameter of the open ring 31 is less than or equal to the inner diameter of the retaining ring 22. When the positions of each protrusion 34 correspond one-to-one with each through groove 34, the two connecting arms 32 are located at positions corresponding to the inlet and outlet grooves 25. In use, each protrusion 34 is arranged one-to-one with each through groove 34, then the anti-detachment ring 30 is moved to pass through the retaining ring 22, and then the anti-detachment ring 30 is rotated so that each protrusion 34 and each through groove 34 are misaligned. The two connecting arms 32 move from the inlet and outlet grooves 25 into the through grooves 23. Finally, the two connecting arms 32 are locked together to achieve anti-detachment connection.

[0059] Example 2

[0060] like Figure 3 and Figure 4 As shown and with reference to other accompanying drawings, the difference between the valve connection structure provided in this embodiment and that in Embodiment 1 is that the sleeve 21 of the limiting sleeve 20 in this embodiment is not integrally connected with the valve body 10, but the two are detachably connected. The retaining ring 22 of the limiting sleeve 20 does not have a through groove 24 and an inlet / outlet groove 25. The outer diameter of the open ring 31 is larger than the inner diameter of the retaining ring 22 and smaller than the inner diameter of the sleeve 21.

[0061] Specifically, the sleeve 21 is fitted onto the connecting end of the valve body 10, and a set screw hole 26 is provided on the side wall of the sleeve 21. A set screw (not shown in the figure) is screwed onto the set screw hole 26 and abuts against the connecting end, thereby realizing the detachable connection between the limit sleeve 20 and the valve body 10. The anti-detachment ring 30 needs to be installed in the limit sleeve 20 before the limit sleeve 20 is connected to the valve body 10. During installation, the two connecting arms 32 need to be inserted into the through groove 23 first, and then the open ring 31 is installed into the sleeve 21.

[0062] Preferably, in this embodiment, an anti-loosening groove 13 is provided on the outer wall of the connecting end to cooperate with the set bolt. The set bolt abuts against the bottom of the anti-loosening groove 13, which helps to prevent the set bolt from slipping along the axial direction of the pipe after loosening under external vibration, thus improving the anti-loosening effect. In addition, the anti-loosening groove 13 is an annular groove, and a slot 14 is provided on the side wall of the annular groove facing the retaining ring 32 to cooperate with the set bolt. In this way, during disassembly, only the set bolt needs to be loosened, without unscrewing the entire set bolt. The set bolt can be rotated to the position corresponding to the slot 14 by rotating the limiting sleeve 20, and then removed from the annular groove through the slot 14 to achieve disassembly. Similarly, during installation, the set bolt can be pre-screwed in, and then the set bolt can be inserted into the annular groove through the slot 14. Then, the limiting sleeve 20 can be rotated to achieve connection. At this time, the set bolt is equivalent to a hook.

[0063] In addition, a positioning block 15 is fixedly connected to the annular groove at a position next to the slot 14, which makes it easy for the user to quickly rotate the set bolt to the position corresponding to the slot 14 during disassembly.

[0064] Example 3

[0065] like Figure 5 As shown in the figure and with reference to other figures, the difference between the valve connection structure provided in this embodiment and that in embodiment two is that the valve body 10 used in this embodiment is a gate valve body. The gate valve body has two connection ends that are connected to the pipeline. One of the connection sections is connected to the pipeline using a conventional threaded connection structure, which will not be described in detail here. This embodiment mainly describes the connection structure of the other connection end. Therefore, the connection ends mentioned below refer to the connection ends with non-threaded connection structures.

[0066] In this embodiment, although the sleeve 21 is also fitted onto the connecting end, it does not have a set threaded hole or a set bolt. Instead, a hook 27 is fixedly connected to the end of the sleeve 21 away from the retaining ring 32 by an integral connection. A groove 17 that mates with the hook 27 is provided on the outer wall of the connecting end. Since the limiting sleeve 20 is usually a metal sleeve, and the hook 27 that connects to the sleeve 21 is usually also made of metal, its elasticity is relatively low. In order to facilitate the hook to be inserted into the groove, in this embodiment, the groove 17 is the same as the annular groove in embodiment two. A slot 14 that mates with the hook 27 is provided on the side wall of the annular groove facing the retaining ring 32. In this way, the hook 27 can pass through the slot 14 into the annular groove, and then the limiting sleeve 20 is rotated to achieve the engagement.

[0067] Preferably, a positioning block is fixedly connected to the annular groove at a position next to the slot 14. Figure 5 (not shown), which allows the user to quickly rotate the hook 27 to the position corresponding to the slot 14 during disassembly.

[0068] Example 4

[0069] like Figures 6-8 As shown in the figures and with reference to other accompanying drawings, this embodiment provides a pipe valve anti-disconnection connection structure, including a valve body 10 and an anti-disconnection component. The valve body 10 can be the body of a pipe connection valve, the valve body of a functional valve such as a gate valve or a throttle valve, or the housing of a detection device such as a water meter or a pressure gauge. In this embodiment, the valve body is described as the body of a pipe connection valve.

[0070] The valve body 10 has a connection end for connecting to a pipeline. This connection end refers not only to the end face but also to the portion of the valve body 10 near the end face. It should be noted that the valve body 10 may have multiple connection ends, each connecting to different pipelines. The connection structures between each connection end and the pipeline can be the same or different. In this embodiment, the valve body 10 has two connection ends. One connection segment uses a conventional flange connection structure to connect to the pipeline, which will not be described in detail here. This embodiment mainly describes the connection structure of the other connection end; therefore, the connection ends mentioned below refer to those without flange connections.

[0071] A connecting hole 11 for inserting a pipe is provided on the connecting end. A sealing element 12 for sealing the pipe is provided on the inner side wall of the connecting hole, that is, the sealing element 12 is located between the inner side wall of the connecting hole 11 and the outer side wall of the pipe. The structure and installation structure of the sealing element 12 are existing structures. This embodiment adopts the sealing ring structure in the anti-detachment pipe joint disclosed in Chinese Utility Model Patent No. CN216715490U. Specifically, the anti-detachment connection structure of the pipe valve provided in this embodiment also includes a pressure sleeve 40. The connecting end also has a countersunk hole arranged coaxially with the connecting hole 11. The sealing element 12 is provided in the countersunk hole. One end of the pressure sleeve 40 abuts against the sealing ring, which serves as the sealing element 12, and the other end is detachably connected to the limiting sleeve 20 mentioned below, that is, the pressure sleeve 40 is detachably connected to the limiting sleeve 20. In addition, the pressure sleeve 40 and the valve body 10 are respectively provided with corresponding connecting ears 16. The two corresponding connecting ears 16 are connected by bolt assembly, that is, the pressure sleeve 40 and the valve body 10 are detachably connected. In this way, while realizing the detachable fixed connection between the pressure sleeve 40 and the valve body 10, it can be ensured that the pressure sleeve 40 can be pressed tightly on the sealing ring.

[0072] The anti-detachment component includes a limiting sleeve 20 and an anti-detachment ring 30 located inside the limiting sleeve 20. The limiting sleeve 20 is detachably connected to the pressure sleeve 40 and indirectly detachably connected to the valve body 10. The limiting sleeve 20 includes a sleeve body 21 with one end facing the connection hole 11, a retaining ring 22 integrally connected to the end of the sleeve body 21 away from the connection hole 11, and a retaining plate 28 integrally connected to the end of the sleeve body 21 away from the retaining ring 22. A through groove 23 is provided on the side wall of the sleeve body 21. The anti-detachment ring 30 includes an open ring body 31 and locking arms 32 fixedly connected to both ends of the open ring body 31. Both locking arms 32 are inserted into the through groove 23 and extend to the outside of the limiting sleeve 20. A fastener (not shown in the figure) is provided between the two locking arms 32 to press the two locking arms 32 together. In use, the pipe is inserted into the open ring body 31 and the connecting hole 11 at the same time. The fastener is used to press the two locking arms 32 together, which drives the two ends of the open ring body 31 to move towards each other, so that the open ring body 31 grips the pipe and achieves anti-detachment.

[0073] Preferably, to improve the anti-detachment effect, in this embodiment, the inner sidewall of the open ring 31 is provided with anti-detachment teeth or anti-detachment grooves. Considering that the anti-detachment ring 30 is usually made of steel and has relatively low elasticity, in this embodiment, the inner sidewall and / or outer sidewall of the open ring 31 are provided with partition grooves 35. This helps to increase the elasticity or flexibility of the anti-detachment ring 30, making it suitable for pipes of different diameters. Of course, the structure of the anti-detachment ring 30 can also be the same as in Embodiment 1.

[0074] Preferably, the fastener is a fastening bolt. Specifically, each locking arm 32 has a through hole 33, and the fastening bolt is inserted into each through hole 33. A nut is screwed onto the fastening bolt, and the two locking arms 32 are clamped between the nut and the nut of the fastening bolt. In this way, the two locking arms 32 can be pressed together by tightening the nut, so that the open ring 31 clamps the pipe. Of course, a through hole can also be opened on one of the locking arms 32, and a locking threaded hole coaxially arranged with the through hole can be opened on the other locking arm 32. The fastening bolt is inserted into the through hole and screwed onto the locking threaded hole, and the nut of the fastening bolt abuts against the locking arm 32 with the through hole. In this way, the two locking arms 32 can be pressed together by simply rotating the fastening bolt.

[0075] In addition, the pressure sleeve 40 is provided with an annular groove 41 that cooperates with the clamping plate 28 and a notch that communicates with the annular groove 41. The number of notches is the same as that of the clamping plate 28. When one of the clamping plates 28 is located in a position corresponding to one of the notches, the other clamping plates 28 are arranged in a corresponding manner to the other notches. In this way, the clamping plate 28 can pass through the notch into the annular groove 41, and then the clamping between the limiting sleeve 20 and the pressure sleeve 40 is achieved by rotating the limiting sleeve 20. The anti-detachment ring 30 is restricted between the retaining ring 22 and the pressure sleeve 40.

[0076] Example 5

[0077] like Figure 9 As shown and with reference to other accompanying drawings, the difference between the valve anti-detachment connection structure provided in this embodiment and that in Embodiment 4 lies in the connection structure between the limiting sleeve 20 and the pressure sleeve 40. In this embodiment, the structure of the limiting sleeve 20 is the same as that in Embodiment 2, that is, the limiting sleeve 20 does not have a retaining plate, but instead has a set threaded hole 26 on the side wall of the sleeve body 21. A set bolt (not shown in the figure) is screwed onto the set threaded hole 26 and abuts against the annular groove of the pressure sleeve 40, thereby realizing a detachable connection between the limiting sleeve 20 and the pressure sleeve 40. In other words, the detachable connection structure between the limiting sleeve 20 and the pressure sleeve 40 in this embodiment is basically the same as the detachable connection structure between the limiting sleeve 20 and the valve body 10 in Embodiment 2, and will not be repeated here.

[0078] Example 6

[0079] like Figure 10 and Figure 11As shown and with reference to other accompanying drawings, the difference between the valve anti-detachment connection structure provided in this embodiment and that in embodiment four lies in the different connection structures between the limiting sleeve 20, the pressure sleeve 40, and the valve body 10. Specifically, in this embodiment, the pressure sleeve 40 is not provided with connecting ears 16, but the limiting sleeve 20 is provided with connecting ears 16. Of course, the number of connecting ears 16 on the limiting sleeve 20 and the connecting ears 16 on the valve body 10 are the same and are arranged in a one-to-one correspondence. The two corresponding connecting ears 16 are connected by a bolt assembly, that is, the limiting sleeve 20 and the valve body 10 are detachably connected. In this way, while realizing the detachable and fixed connection between the limiting sleeve 20 and the valve body 10, the pressure sleeve 40 can be pushed to press against the sealing ring.

[0080] In addition, a connecting threaded hole 42 is provided on the end of the sleeve 21 facing the connecting hole 11, and a connecting smooth hole 43 is provided on the pressure sleeve 40, which is coaxially arranged with the connecting threaded hole 42. A connecting bolt (not shown in the figure) is inserted in the connecting smooth hole 43 and is simultaneously screwed into the connecting threaded hole 42. The nut of the connecting bolt abuts against the pressure sleeve 40, thereby realizing a detachable fixed connection between the pressure sleeve 40 and the limiting sleeve 20.

[0081] Example 7

[0082] The difference between the valve connection structure provided in this embodiment and that in embodiment one is that the limiting sleeve 20 and the retaining ring 22 in this embodiment do not have through grooves 24 and inlet / outlet grooves 25, and the outer diameter of the open ring body 31 is larger than the inner diameter of the retaining ring 22 and smaller than the inner diameter of the sleeve body 21.

[0083] Since the anti-detachment ring 30 in the valve connection structure provided in this embodiment is difficult to assemble by assembly, it is necessary to install the anti-detachment ring 30 into the limiting sleeve 20 during remanufacturing. Specifically, the retaining ring 22 cannot be directly formed during casting, but is obtained by welding or other processes after the anti-detachment ring 30 is installed.

[0084] The present invention has been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, and these modifications all fall within the protection scope of the present invention.

Claims

1. A valve anti-disconnection connection structure, comprising a valve body, characterized in that, It also includes an anti-detachment component. The valve body has a connecting end with a connecting hole for inserting a pipe. The anti-detachment component includes a limiting sleeve fixedly or detachably connected to the valve body and an anti-detachment ring located inside the limiting sleeve. The limiting sleeve includes a sleeve body with one end facing the connecting hole and a retaining ring fixedly connected to the end of the sleeve body away from the connecting hole. A through groove is provided on the side wall of the sleeve body. The anti-detachment ring includes an open ring body and locking arms fixedly connected to both ends of the open ring body. Both locking arms are inserted into the through groove and extend to the outside of the limiting sleeve. A fastener is provided between the two locking arms to press the two locking arms together.

2. The anti-detachment connection structure for pipe valves as described in claim 1, characterized in that, The inner wall of the connection hole is provided with a sealing element for sealing the pipe.

3. The anti-disconnection connection structure for pipe valves as described in claim 1, characterized in that, The inner wall of the open ring is provided with anti-detachment teeth or anti-detachment texture, and the inner wall and / or outer wall of the open ring are provided with partition grooves.

4. The anti-disconnection connection structure for pipe valves as described in claim 1, characterized in that, The fastener is a fastening bolt.

5. The anti-disconnection connection structure for pipe valves as described in claim 1, characterized in that, The sleeve is integrally connected to the valve body.

6. The anti-detachment connection structure for pipe valves as described in claim 5, characterized in that, At least two protrusions are fixedly connected to the outer wall of the open ring. The retaining ring has through grooves that mate with each of the protrusions one-to-one and inlet / outlet grooves that mate with the connecting arm. The inlet / outlet grooves extend to the sleeve and communicate with the through groove.

7. The valve anti-disconnection connection structure as described in claim 1, characterized in that, The sleeve is fitted onto the connecting end, and a set screw hole is provided on the side wall of the sleeve. A set screw is screwed onto the set screw hole and abuts against the connecting end.

8. The anti-detachment connection structure for pipe valves as described in claim 7, characterized in that, The outer wall of the connecting end is provided with a locking groove that cooperates with the set bolt.

9. The anti-detachment connection structure for pipe valves as described in claim 1, characterized in that, The sleeve is fitted onto the connecting end, and a hook is fixedly connected to the sleeve. A groove that mates with the hook is provided on the outer side wall of the connecting end.

10. The anti-detachment connection structure for pipe valves as described in claim 8, characterized in that, The anti-detachment groove is an annular groove, and a slot for engaging with the set bolt is provided on the side wall of the annular groove facing the retaining ring.

11. The anti-detachment connection structure for pipe valves as described in claim 9, characterized in that, The slot is an annular groove, and a slot that engages with the hook is provided on the side wall of the annular groove facing the retaining ring.

12. The valve anti-disconnection connection structure as described in claim 10 or 11, characterized in that, The annular groove is fixedly connected to a positioning block at a position next to the slot.

13. The anti-disconnection connection structure for pipe valves as described in claim 1, characterized in that, It also includes a pressure sleeve that is detachably connected to the limiting sleeve, and the pressure sleeve is detachably connected to the valve body.

14. The anti-disconnection connection structure for pipe valves as described in claim 1, characterized in that, It also includes a pressure sleeve, and the connecting end is provided with a countersunk hole arranged coaxially with the connecting hole. A sealing element is provided in the countersunk hole, one end of the pressure sleeve abuts against the sealing element, and the other end is detachably connected to the limiting sleeve.

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