Pipe valve anti-drop connecting structure

Abstract

The invention relates to a pipeline connecting structure, in particular to a pipe valve anti-disengaging connecting structure which comprises a valve body and an anti-disengaging assembly, the valve body is provided with a connecting end, a connecting hole is formed in the connecting end, and the anti-disengaging assembly comprises a limiting sleeve and an anti-disengaging 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] The invention relates to a pipeline connection structure, in particular to a pipe-valve anti-detachment connection structure. Background Art

[0002] In drainage networks or water supply networks, connecting valves or telescopic valves are usually required to connect two pipes. Pipes and various functional valves also need to be connected. Anti-detachment structures are usually set at these connection locations to prevent the pipes or the pipes and functional valves from detaching or misaligning from each other under the action of external forces, causing water leakage.

[0003] Traditional anti-slip structures for pipelines usually utilize a compression conical surface to achieve tightening, such as the elastic metal pressure ring used in a bidirectional pipeline anti-slip joint disclosed in the Chinese utility model patent with publication number CN206175894U, the expansion pressure ring for the anti-slip joint disclosed in the Chinese utility model patent with publication number CN211693893U, or the pipeline anti-slip connection assembly disclosed in the Chinese utility model patent with publication number CN216666794U, etc. During the installation process of this type of anti-slip structure, the anti-slip teeth (or anti-slip patterns) in contact with the pipeline will inevitably move along the axial direction of the pipeline with the action of the locking thrust, making the anti-slip teeth easily scraped or worn, affecting the anti-slip effect.

[0004] In view of this, the applicant conducted in-depth research on the anti-disconnection connection structure of the pipe valve, which led to the present case. Summary of the invention

[0005] The object of the present invention is to provide a pipe-valve anti-detachment connection structure with relatively good anti-detachment effect.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A pipe valve anti-detachment connection structure includes a valve body and an anti-detachment component, the valve body has a connecting end, the connecting end is provided with a connecting hole for inserting a pipe, the anti-detachment component includes a limiting sleeve fixedly connected or detachably connected to the valve body and an anti-detachment ring located in 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 sleeve body at one end 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 respectively fixedly connected to the two ends of the open ring body, the two locking arms are inserted in the through groove and extend to the outside of the limiting sleeve, and a fastener for pressing the two locking arms toward each other is provided between the two locking arms.

[0007] As an improvement of the present invention, the inner side wall of the connecting hole is provided with a sealing member for sealing the pipeline.

[0008] As an improvement of the present invention, anti-slip teeth or anti-slip lines are provided on the inner side wall of the open ring body, and a partition groove is provided on the inner side wall and / or the outer side wall of the open ring body.

[0009] As an improvement of the present invention, the fastener is a fastening bolt.

[0010] As an improvement of the present invention, the sleeve is integrally connected to the valve body.

[0011] As an improvement of the present invention, at least two protrusions are fixedly connected to the outer wall of the open ring body, and the retaining ring is provided with through grooves that respectively cooperate with each of the protrusions one-to-one and an entry and exit groove that cooperates with the connecting arm, and the entry and exit grooves extend to the sleeve body and are connected to the through groove.

[0012] As an improvement of the present invention, the sleeve is sleeved on the connecting end, and a fixing threaded hole is opened on the side wall of the sleeve, and a fixing bolt that abuts against the connecting end is spirally connected to the fixing threaded hole.

[0013] As an improvement of the present invention, an anti-slip groove cooperating with the fixing bolt is provided on the outer side wall of the connecting end.

[0014] As an improvement of the present invention, the sleeve is sleeved on the connecting end, and a hook is fixedly connected to the sleeve, and a slot cooperating with the hook is provided on the outer side wall of the connecting end.

[0015] As an improvement of the present invention, the anti-slip groove or the clamping groove is an annular groove, and a slot cooperating with the fixing bolt or the clamping hook is provided on the side wall of the annular groove facing the retaining ring.

[0016] As an improvement of the present invention, a positioning block is fixedly connected to the annular groove at a position adjacent to the slot.

[0017] As an improvement of the present invention, it further comprises a pressing sleeve detachably connected to the limiting sleeve, and the pressing sleeve is detachably connected to the valve body.

[0018] As an improvement of the present invention, it also includes a pressing sleeve, the connecting end is also provided with a countersunk hole coaxially arranged with the connecting hole, a sealing member is arranged in the countersunk hole, one end of the pressing sleeve is pressed against the sealing member, and the other end is detachably connected to the limiting sleeve.

[0019] By adopting the above scheme, the present invention has the following beneficial effects: 1. By setting the locking arm, the anti-slip ring can be clamped on the pipe after being moved to the position where it needs to be locked. During the locking process, the anti-slip teeth will not move in the axial direction of the pipe, and the anti-slip effect is relatively good.

[0020] 2. By providing a partition groove on the inner wall and / or outer wall of the open ring body, it helps to increase the elasticity or flexibility of the anti-slip ring, so that it can be applied to pipes with more different diameters.

[0021] 3. Using hooks or set bolts to achieve a detachable connection between the limit sleeve and the valve body not only helps to increase the speed of disassembly and assembly, but also has relatively low costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the pipe valve anti-detachment connection structure in Example 1; Figure 2 This is a schematic diagram of the structure of the anti-slip ring in Example 1; Figure 3 This is a schematic diagram of the pipe valve anti-detachment connection structure in Example 2; Figure 4 This is a schematic diagram of the exploded structure of the pipe valve anti-detachment connection structure in Example 2; Figure 5 This is a schematic diagram of the pipe valve anti-detachment connection structure in Example 3; Figure 6 This is a schematic diagram of the pipe valve anti-detachment connection structure in Example 4; Figure 7 This is a schematic cross-sectional view of the anti-detachment connection structure of the pipe valve in the fourth embodiment; Figure 8 This is a schematic diagram of the exploded structure of the pipe valve anti-detachment connection structure in Example 4; Fig. 9 This is a schematic diagram of the pipe valve anti-detachment connection structure in Example 5; Fig.10 This is a schematic diagram of the pipe valve anti-detachment connection structure in Example 6; Fig.11 It is a schematic cross-sectional structure diagram of the pipe valve anti-detachment connection structure in Example 6.

[0023] The markings in the figure correspond to the following: 10-valve body; 11-connection hole; 12-seal; 13-anti-slip groove; 14-slot; 15-positioning block; 16-connecting ear; 17-card slot; 20-limiting sleeve; 21- sleeve body; 22- retaining ring; 23-through groove; 24-through groove; 25-entry and exit groove; 26-fastening threaded hole; 27-hook; 28-card plate; 30- anti-slip ring; 31- open ring body; 32-locking arm; 33-through hole; 34-bump; 35-partition groove; 40-pressing sleeve; 41-annular groove; 42-connection threaded hole; 43-connection smooth hole. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiment 1 like Figure 1 and Figure 2 As shown, this embodiment provides a pipe-valve anti-detachment connection structure, including a valve body 10 and an anti-detachment component, wherein the valve body 10 can be the body of a pipeline connection valve, or the valve body of a functional valve such as a gate valve and a throttle valve, or the shell of a detection device such as a water meter and a pressure gauge. In this embodiment, the valve body is taken as the body of a pipeline connection valve for explanation.

[0026] The valve body 10 has a connection end for connecting to a pipeline. The connection end here refers not only to the end face, but also to the part of the valve body 10 close to the end face. It should be noted that the valve body 10 can have multiple connection ends, which are respectively connected to different pipelines. The connection structure 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 of which is connected to the pipeline using a conventional flange connection structure, which will not be described in detail here. This embodiment mainly describes the connection structure of the other connection end, so the connection ends mentioned below all refer to the connection ends of the non-flange connection structure.

[0027] A connection hole 11 for inserting a pipe is provided on the connection end, and a seal 12 for sealing the pipe is provided on the inner wall of the connection hole, that is, the seal 12 is provided between the inner wall of the connection hole 11 and the outer wall of the pipe. The structure of the seal 12 and its installation structure are existing structures. This embodiment adopts the sealing ring structure in the pipe anti-detachment connection structure disclosed in the Chinese invention patent with publication number CN219510345U, which will not be described in detail here.

[0028] The anti-slip assembly includes a limit sleeve 20 fixedly connected or detachably connected to the valve body 10 and an anti-slip ring 30 located in the limit sleeve 20, wherein the limit sleeve 20 includes a sleeve body 21 with one end facing the connecting hole 11 and a retaining ring 22 fixedly connected to the end of the sleeve body 21 away from the connecting hole 11 by an integral connection. In this embodiment, the sleeve body 21 is integrally connected to the valve body 10 (that is, a fixed connection is achieved by an integral connection), that is, the sleeve body 21 and the valve body 10 are two different parts of the same part, so that the two can be obtained by one-time casting, and the cost is relatively low. It should be noted that although the sleeve body 21 and the valve body 10 are integrally connected, the aperture of the inner hole of the sleeve body 21 needs to be larger than the aperture of the connecting hole 11 in order to accommodate the anti-slip ring 20. A through groove 23 that penetrates the sleeve body is provided on the side wall of the sleeve body 21. The anti-slip ring 30 includes an open ring body 31 and locking arms 32 fixedly connected to the two ends of the open ring body 31 respectively. The outer diameter of the open ring body 31 is larger than the aperture of the connecting hole 11, so that the end of the connecting end can be used to support the open ring body 31 to prevent the open ring body 31 from sliding into the connecting hole 11; the two locking arms 32 are inserted into the through groove 23 and extend to the outside of the limiting sleeve 20, and a fastener (not shown in the figure) for pressing the two locking arms 32 toward each other is provided between the two locking arms 32. When in use, the pipeline is inserted into the open ring body 31 and the connecting hole 11 at the same time, and the two locking arms 32 are pressed toward each other by the fastener, driving the two ends of the open ring body 31 to move toward each other, so that the open ring body 31 hugs the pipeline to achieve anti-slip.

[0029] Preferably, in order to improve the anti-slip effect, in the present embodiment, anti-slip teeth or anti-slip lines are provided on the inner side wall of the open ring body 31 .

[0030] 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 at the same time. A nut is screwed on 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 toward each other by tightening the nut, so that the open ring body 31 hugs the pipe. Of course, a through hole can be provided on one of the locking arms 32, and a locking threaded hole coaxially arranged with the through hole can be provided on the other locking arm 32. The fastening bolt is inserted into the through hole and screwed on 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 toward each other by just rotating the fastening bolt.

[0031] In addition, in order to facilitate the placement of the anti-slip ring 30 into the limiting sleeve 20 during use, in the present embodiment, at least two protrusions 34 are fixedly connected to the outer wall of the open ring body 31, and the retaining ring 22 is provided with through grooves 24 that respectively cooperate with each protrusion 34 one-to-one and entry and exit grooves 25 that cooperate with the two connecting arms 32, wherein the entry and exit grooves 25 extend to the sleeve body 21 and are connected with the through groove 23, and the entry and exit grooves 25 penetrate the retaining ring 22 and the sleeve body 21 at the same time, and the side of the entry and exit 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 entry and exit groove 25 is greater than the length of the through groove 23. The outer diameter of the open ring body 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 entry and exit grooves 25. When in use, each protrusion 34 is arranged one-to-one with each through groove 34, and then the anti-slip ring 30 is moved to pass through the retaining ring 22, and then the anti-slip ring 30 is rotated so that each protrusion 34 is staggered with each through groove 34, and the two connecting arms 32 are moved from the entry and exit grooves 25 into the through grooves 23, and finally the two connecting arms 32 are locked toward each other to achieve an anti-slip connection.

[0032] Embodiment 2 like Figure 3 and Figure 4 As shown and with reference to other drawings, the difference between the pipe-valve connection structure provided in this embodiment and that in the first embodiment is that the sleeve body 21 of the limiting sleeve 20 in this embodiment is not integrally connected to the valve body 10, and the two are detachably connected, and the retaining ring 22 of the limiting sleeve 20 does not have a through groove 24 and an entry and exit groove 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.

[0033] Specifically, the sleeve 21 is sleeved on the connecting end of the valve body 10, and a fixing threaded hole 26 is opened on the side wall of the sleeve 21, and a fixing bolt (not shown in the figure) is spirally connected to the fixing threaded hole 26 and abutted against the connecting end, so as to realize the detachable connection between the limit sleeve 20 and the valve body 10, and the anti-slip 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, and then the open ring body 31 needs to be installed in the sleeve 21.

[0034] Preferably, in this embodiment, a stop groove 13 cooperating with the fixing bolt is provided on the outer wall of the connection end, and the fixing bolt abuts against the bottom of the stop groove 13, which helps to prevent the fixing bolt from sliding along the axial direction of the pipeline after being loosened under the action of external vibration, thereby improving the anti-slip effect. In addition, the stop groove 13 is an annular groove, and a slot 14 cooperating with the fixing bolt is provided on the side wall of the annular groove facing the retaining ring 32, so that when disassembling, it is only necessary to loosen the fixing bolt without screwing out the entire fixing bolt, and the fixing bolt can be rotated to a 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, when installing, the fixing bolt can be pre-screwed in, and then the fixing bolt is inserted into the annular groove through the slot 14, and then the limiting sleeve 20 is rotated to achieve connection. At this time, the fixing bolt is equivalent to a hook.

[0035] In addition, a positioning block 15 is fixedly connected to the annular groove at a position next to the slot 14, so that the user can quickly rotate the fixing bolt to a position corresponding to the slot 14 during disassembly.

[0036] Embodiment 3 like Figure 5 As shown and with reference to other drawings, the difference between the pipe valve connection structure provided in this embodiment and that of the second embodiment is that the main body 10 adopted in this embodiment is a gate valve housing, which has two connection ends connected to the pipeline, and 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, so the connection ends mentioned below all refer to the connection ends of the non-threaded connection structure.

[0037] Although the sleeve body 21 in this embodiment is also sleeved on the connecting end, it does not have a fixing threaded hole and a fixing bolt. Instead, a hook 27 is fixedly connected to the end of the sleeve body 21 away from the retaining ring 32 in an integrated manner, and a slot 17 cooperating with the hook 27 is provided on the outer wall of the connecting end. Since the limiting sleeve 20 is usually a metal sleeve, the hook 27 connected to the sleeve body 21 is usually also made of metal with relatively low elasticity. In order to facilitate the hook to be inserted into the slot, in this embodiment, the slot 17 is the same annular groove as that in Example 2, and a slot 14 cooperating with the hook 27 is provided on the side wall of the annular groove facing the retaining ring 32, so that the hook 27 can be inserted into the annular groove through the slot 14, and then the locking is achieved by rotating the limiting sleeve 20.

[0038] Preferably, the annular groove is fixedly connected with a positioning block ( Figure 5 This makes it easy for the user to quickly rotate the hook 27 to a position corresponding to the slot 14 during disassembly.

[0039] Embodiment 4 like Figure 6-Figure 8As shown and with reference to other drawings, this embodiment provides a pipe valve anti-detachment connection structure, including a valve body 10 and an anti-detachment component, wherein the valve body 10 can be the body of a pipeline connection valve, or the valve body of a functional valve such as a gate valve and a throttle valve, or the shell of a detection device such as a water meter and a pressure gauge. In this embodiment, the valve body is taken as the body of a pipeline connection valve for explanation.

[0040] The valve body 10 has a connection end for connecting to a pipeline. The connection end here refers not only to the end face, but also to the part of the valve body 10 close to the end face. It should be noted that the valve body 10 can have multiple connection ends, which are respectively connected to different pipelines. The connection structure 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 of which is connected to the pipeline using a conventional flange connection structure, which will not be described in detail here. This embodiment mainly describes the connection structure of the other connection end, so the connection ends mentioned below all refer to the connection ends of the non-flange connection structure.

[0041] A connection hole 11 for inserting a pipe is provided on the connection end, and a seal 12 for sealing the pipe is provided on the inner wall of the connection hole, that is, the seal 12 is provided between the inner wall of the connection hole 11 and the outer wall of the pipe. The structure of the seal 12 and its installation structure are existing structures. This embodiment adopts the sealing ring structure in the anti-detachment pipe joint disclosed in the Chinese invention patent with publication number CN216715490U. Specifically, the anti-detachment connection structure of the pipe valve provided in this embodiment also includes a pressing sleeve 40, and the connection end is also provided with a countersunk hole coaxially arranged with the connection hole 11, and the seal 12 is provided in the countersunk hole. One end of the pressing sleeve 40 abuts against the sealing ring serving as the seal 12, and the other end is detachably connected to the limit sleeve 20 mentioned below, that is, the pressing sleeve 40 is detachably connected to the limit sleeve 20. In addition, the pressing sleeve 40 and the valve body 10 are respectively provided with connecting ears 16 arranged corresponding to each other, and the two connecting ears 16 arranged corresponding to each other are connected by a bolt assembly, that is, the pressing sleeve 40 and the valve body 10 are detachably connected. In this way, while realizing the detachable fixed connection between the pressing sleeve 40 and the valve body 10, it can ensure that the pressing sleeve 40 can be pressed onto the sealing ring.

[0042] The anti-drop assembly includes a limit sleeve 20 and an anti-drop ring 30 located in the limit sleeve 20, wherein the limit sleeve 20 is indirectly detachably connected to the valve body 10 by being detachably connected to the pressing sleeve 40. The limit sleeve 20 includes a sleeve body 21 with one end facing the connecting hole 11, a retaining ring 22 fixedly connected to the end of the sleeve body 21 away from the connecting hole 11 by an integral connection, and a clamping plate 28 fixedly connected to the end of the sleeve body 21 away from the retaining ring 22 by an integral connection, and a through groove 23 penetrating the sleeve body is provided on the side wall of the sleeve body 21. The anti-slip ring 30 includes an open ring body 31 and locking arms 32 fixedly connected to the two ends of the open ring body 31, the two locking arms 32 are inserted in the through groove 23 and extend to the outside of the limiting sleeve 20, and a fastener (not shown in the figure) for pressing the two locking arms 32 toward each other is provided between the two locking arms 32. When in use, the pipeline is inserted in the open ring body 31 and the connecting hole 11 at the same time, and the two locking arms 32 are pressed toward each other by the fastener, driving the two ends of the open ring body 31 to move toward each other, so that the open ring body 31 hugs the pipeline to achieve anti-slip.

[0043] Preferably, in order to improve the anti-slip effect, in this embodiment, anti-slip teeth or anti-slip lines are provided on the inner side wall of the open ring body 31. Considering that the anti-slip ring 30 is usually made of steel material with relatively low elasticity, in this embodiment, a partition groove 35 is provided on the inner side wall and / or outer side wall of the open ring body 31, which helps to increase the elasticity or flexibility of the anti-slip ring 30 and make it suitable for pipes of different diameters. Of course, the structure of the anti-slip ring 30 can also be the same as that of the first embodiment.

[0044] 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 at the same time. A nut is screwed on 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 toward each other by tightening the nut, so that the open ring body 31 hugs the pipe. Of course, a through hole can be provided on one of the locking arms 32, and a locking threaded hole coaxially arranged with the through hole can be provided on the other locking arm 32. The fastening bolt is inserted into the through hole and screwed on 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 toward each other by just rotating the fastening bolt.

[0045] In addition, the pressing sleeve 40 is also provided with an annular groove 41 that cooperates with the clamping plate 28 and a notch that is connected to the annular groove 41. The number of the notch is the same as the clamping plates 28, and when one of the clamping plates 28 is located at a position corresponding to one of the notch, the other clamping plates 28 are arranged one by one with the other notch, so that the clamping plate 28 can pass through the annular groove 41 through the notch, and then the clamping connection between the limit sleeve 20 and the pressing sleeve 40 is achieved by rotating the limit sleeve 20, and the anti-slip ring 30 is restricted between the retaining ring 22 and the pressing sleeve 40.

[0046] Embodiment 5 like Fig. 9 As shown and with reference to other drawings, the difference between the anti-detachment connection structure of the pipe valve provided in this embodiment and the fourth embodiment is that the connection structure between the limit sleeve 20 and the pressing sleeve 40 is different. In this embodiment, the structure of the limit sleeve 20 is the same as that of the second embodiment, that is, the limit sleeve 20 is not provided with a clamping plate, but a fixing threaded hole 26 is opened on the side wall of the sleeve body 21, and a fixing bolt (not shown in the figure) that is screwed on the fixing threaded hole 26 and abuts against the annular groove of the pressing sleeve 40 is screwed, so as to realize the detachable connection between the limit sleeve 20 and the pressing sleeve 40. That is to say, the detachable connection structure between the limit sleeve 20 and the pressing sleeve 40 in this embodiment is basically the same as the detachable connection structure between the limit sleeve 20 and the valve body 10 in the second embodiment, and will not be repeated here.

[0047] Embodiment 6 like Fig.10 and Fig.11 As shown and with reference to other drawings, the difference between the anti-detachment connection structure of the pipe valve provided in this embodiment and the fourth embodiment lies in the different connection structures between the limit sleeve 20, the pressing sleeve 40 and the valve body 10. Specifically, in this embodiment, the pressing sleeve 40 is not provided with a connecting ear 16, but the connecting ear 16 is provided on the limit sleeve 20. Of course, the connecting ears 16 on the limit sleeve 20 are the same in number as the connecting ears 16 on the valve body 10 and are arranged one by one. The two connecting ears 16 arranged corresponding to each other are connected by a bolt assembly, that is, the limit sleeve 20 is detachably connected to the valve body 10. In this way, while realizing the detachable and fixed connection between the limit sleeve 20 and the valve body 10, the pressing sleeve 40 can be pushed to be pressed tightly on the sealing ring.

[0048] In addition, a connecting threaded hole 42 is provided on the end of the sleeve body 21 facing the connecting hole 11, and a connecting light hole 43 coaxially arranged with the connecting threaded hole 42 is provided on the pressing sleeve 40. A connecting bolt (not shown in the figure) which is simultaneously screwed into the connecting threaded hole 42 is inserted through the connecting light hole 43, and the nut of the connecting bolt abuts against the pressing sleeve 40, thereby realizing a detachable fixed connection between the pressing sleeve 40 and the limiting sleeve 20.

[0049] Embodiment 7 The difference between the pipe valve connection structure provided in this embodiment and that in the first embodiment is that the through groove 24 and the entry and exit groove 25 are not provided on the retaining ring 22 of the limiting sleeve 20 in this embodiment, 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.

[0050] Since the anti-slip ring 30 is difficult to assemble by assembly in the pipe-valve connection structure provided in this embodiment, the anti-slip ring 30 needs to be installed in the limiting sleeve 20 during remanufacturing. Specifically, the retaining ring 22 cannot be directly formed during casting, but after the anti-slip ring 30 is installed, the retaining ring 22 is obtained by welding and other processes.

[0051] The present invention is described in detail above with reference to the accompanying drawings, but 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, which all belong to the protection scope of the present invention.

Claims

1. A pipe valve anti-detachment connection structure, comprising a valve body, characterized in that: It also includes an anti-slip assembly, the valve body has a connecting end, the connecting end is provided with a connecting hole for inserting a pipe, the anti-slip assembly includes a limiting sleeve fixedly connected or detachably connected to the valve body and an anti-slip ring located in 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 sleeve body at one end away from the connecting hole, a through groove is provided on the side wall of the sleeve body, the anti-slip ring includes an open ring body and locking arms respectively fixedly connected to the two ends of the open ring body, the two locking arms are inserted in the through groove and extend to the outside of the limiting sleeve, and a fastener for pressing the two locking arms toward each other is provided between the two locking arms.

2. The pipe valve anti-detachment connection structure according to claim 1, characterized in that: The inner side wall of the connecting hole is provided with a sealing member for sealing the pipeline.

3. The pipe valve anti-detachment connection structure according to claim 1, characterized in that: Anti-stripping teeth or anti-stripping lines are arranged on the inner side wall of the open ring body, and a partition groove is arranged on the inner side wall and / or the outer side wall of the open ring body.

4. The pipe-valve anti-detachment connection structure according to claim 1, characterized in that: The fastener is a fastening bolt.

5. The pipe-valve anti-detachment connection structure according to claim 1, characterized in that: The sleeve is integrally connected with the valve body.

6. The pipe-valve anti-detachment connection structure according to claim 5, characterized in that: 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 match the protrusions one-to-one and an entry and exit groove that matches the connecting arm. The entry and exit grooves extend to the sleeve body and are connected to the through groove.

7. The pipe-valve anti-detachment connection structure according to claim 1, characterized in that: The sleeve is sleeved on the connecting end, and a fixing threaded hole is opened on the side wall of the sleeve. A fixing bolt that abuts against the connecting end is spirally connected to the fixing threaded hole.

8. The pipe-valve anti-detachment connection structure according to claim 7, characterized in that: An anti-slip groove matched with the fixing bolt is provided on the outer side wall of the connecting end.

9. The pipe-valve anti-detachment connection structure according to claim 1, characterized in that: The sleeve body is sleeved on the connecting end, and a hook is fixedly connected to the sleeve body. A slot cooperating with the hook is formed on the outer side wall of the connecting end.

10. The pipe-valve anti-detachment connection structure according to claim 8 or 9, characterized in that: The anti-slip groove or the clamping groove is an annular groove, and a slot cooperating with the fixing bolt or the clamping hook is provided on the side wall of the annular groove facing the retaining ring.

11. The pipe-valve anti-detachment connection structure according to claim 10, characterized in that: The annular groove is fixedly connected with a positioning block at a position next to the slot.

12. The pipe-valve anti-detachment connection structure according to claim 1, characterized in that: It also includes a pressing sleeve detachably connected to the limiting sleeve, and the pressing sleeve is detachably connected to the valve body.

13. The pipe-valve anti-detachment connection structure according to claim 1, characterized in that: It also includes a pressing sleeve, wherein the connecting end is provided with a countersunk hole coaxially arranged with the connecting hole, a sealing member is arranged in the countersunk hole, one end of the pressing sleeve abuts against the sealing member, and the other end is detachably connected to the limiting sleeve.

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