Pipeline pressure relief plug
By setting a convex ring on the sealing ring of the pipeline pressure relief plug and setting corresponding recesses at the plug cover plate and the outlet of the pressure relief connecting pipe, the problem of the sealing ring being impacted and extruded by high-pressure water flow during tightening is solved. , achieves the stability of the sealing ring and improves the sealing effect.
Patent Information
- Application Number
- CN202420252694.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-02-01
AI Technical Summary
During the tightening process of existing pipeline pressure relief plugs, the sealing ring is easily impacted and extruded by high-pressure water flow, resulting in seal failure.
A pipeline pressure relief plug is designed, with a convex ring on the sealing ring, and a corresponding recess is provided at the mouth of the plug cover plate and the pressure relief connecting pipe. The convex ring is located at the mouth of the plug cover plate and the pressure relief connecting pipe. Under constraints, ensure that the seal ring remains in a stable position during tightening and avoid being extruded.
It effectively avoids the sealing ring being impacted and extruded by high-pressure water flow during tightening, ensuring the stability and sealing effect of the sealing ring, and avoiding seal failure.
Smart Images
Figure CN222503130U_ABST
Abstract
Description
Technical Field
[0001] The utility model patent relates to the field of pipeline technology, and specifically to a pipeline pressure relief plug. Background Art
[0002] Existing gas transmission, water supply and other pipelines are usually buried underground. Due to various reasons, water and gas leakages occur frequently due to pipeline rupture. It is very common to use half joints to quickly plug and repair damaged pipelines. That is, two half-pipe-shaped half-type quick connectors are used during emergency repairs to contain the damaged part of the pipeline in the pipe cavity surrounded by the half joint. The semicircular joint surface of the half joint is tightened with bolts, and the rubber seal is closed to seal the damaged part. This method is widely used in pipeline emergency repairs because it requires fewer people for emergency repairs, short installation time, fast speed, and is simple and easy to use. In addition, pressure work is often required during the repair process. In view of the fact that there is still gas or liquid medium in the damaged pipeline and it may have appropriate pressure, it is necessary to reserve a pressure relief hole in one half of the half joint, and then use a pipe plug to plug the pressure relief hole.
[0003] In the prior art, technicians have provided relevant designs, such as the applicant's prior application named "Haf Joint Repairer Pressure Relief Sealing Structure" (Document No. CN217603642U), in which the cross-section of the sealing ring used for sealing is rectangular. During specific use, it was found that in the process of tightening the plug, as the pressure relief path was gradually blocked, the pressure increased accordingly. Further increase in water pressure will cause the water to spray out from between the sealing ring and the bottom of the annular groove. Under the impact of the high-pressure water flow, the sealing ring is squeezed out of the annular constraint area formed by the plug cover plate and the outer end face of the connecting pipe as shown in Figure 3, causing the seal to fail. Summary of the invention
[0004] The utility model provides a pipeline pressure relief plug, which is intended to prevent a sealing ring from being impacted and squeezed out by a high-pressure water flow when the plug is tightened.
[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a pipeline pressure relief plug, a pressure relief connecting pipe is provided on the repairer pipeline, the pressure relief connecting pipe is provided with an internal thread, the plug includes a plug cover plate, the outer plate surface of the plug cover plate has a concave and convex portion that is convenient for screwing with a tool, the inner plate surface of the plug cover plate seals one end of the threaded pipe, the other end of the threaded pipe is in a free state and there is a through hole penetrating the pipe wall, a sealing ring is sleeved at the root of the threaded pipe at the junction of the threaded pipe and the plug cover plate, characterized in that: the sealing ring includes a flat portion flush with the plate surface of the plug cover plate, the flat portion has a convex ring portion protruding toward the plug cover plate or toward the pipe orifice of the pressure relief connecting pipe, the plug cover plate and / or the pipe orifice of the pressure relief connecting pipe have a recessed portion for accommodating the convex ring portion, and the upper and lower surfaces of the flat portion of the sealing ring are respectively pressed and sealed against the end faces of the pipe orifice of the plug cover plate and the pressure relief connecting pipe.
[0006] In the above scheme, a convex ring portion is arranged on the sealing ring and is embedded with a recessed portion on the plugging cover and / or at the pipe mouth of the pressure relief connecting pipe. During the process of tightening the plug, as the through hole on the pipe wall of the threaded pipe is blocked, the high-pressure and high-speed fluid is bound to pass through the plugging cover, the pipe mouth of the pressure relief connecting pipe and the sealing ring to form a passage. Since the convex ring has been reliably constrained, the position and posture of the sealing ring are guaranteed to remain stable. When the plug is further tightened, the sealing ring will be reliably pressed between the plugging cover and the pipe mouth of the pressure relief connecting pipe to achieve sealing. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1A , 1B They are respectively a structural schematic diagram of the first embodiment and a three-dimensional exploded view of the cross-section of the components;
[0008] Figure 2A , 2B They are respectively a structural schematic diagram of the second embodiment and a three-dimensional exploded view of the cutaway view of the components;
[0009] Figure 3A , 3B They are respectively a structural schematic diagram of the third embodiment and a three-dimensional exploded view of the cutaway view of the components;
[0010] Figure 4A , 4B They are respectively a structural schematic diagram of the fourth embodiment and a three-dimensional exploded view of the component section. DETAILED DESCRIPTION
[0011] In combination with the pipeline pressure relief plug shown in the drawings, the repairer pipeline 10 has a pressure relief connection pipe 11, and the pressure relief connection pipe 11 is provided with an internal thread. The plug 20 includes a plug cover plate 21, and the outer plate surface of the plug cover plate 21 has a concave and convex portion 22 that is convenient for screwing with a tool. The inner plate surface of the plug cover plate 21 is sealed and connected to one end of a threaded pipe 23, and the other end of the threaded pipe 23 is free and has a through hole 231 that penetrates the pipe wall. The threaded pipe 23 and the plug cover plate 21 are connected at the joint of the threaded pipe 23 and the plug cover plate 21. A sealing ring 30 is sleeved at the root of the corrugated tube 23, and the sealing ring 30 includes a flat portion 31 flush with the plate surface of the plugging cover plate 21, and a convex ring portion 32 is provided on the flat portion 31, which protrudes toward the plugging cover plate 21 or the pipe mouth of the pressure relief connecting pipe 11. The plugging cover plate 21 and / or the pipe mouth of the pressure relief connecting pipe 11 are provided with a recessed portion for accommodating the convex ring portion 32, and the upper and lower surfaces of the flat portion 31 of the sealing ring 30 are respectively pressed and sealed against the end faces of the pipe mouth of the plugging cover plate 21 and the pressure relief connecting pipe 11.
[0012] When the plug 20 is initially screwed in, the free end of the threaded tube 23 cooperates with the internal thread of the pressure relief connecting tube 11, and the fluid in the pipeline is discharged from the through hole 231 on the tube wall of the threaded tube 23. The plug 20 is further screwed, and the through hole 231 enters the pipe section of the pressure relief connecting tube 11. The high-pressure and high-speed fluid will pass through the upper and lower ring surfaces of the sealing ring 30. At this time, since the convex ring portion 32 is constrained by the concave portion on the plugging cover plate 21 or at the pipe mouth of the pressure relief connecting tube 11, the ring body of the flat portion 31 of the sealing ring 30 basically remains flat and cannot be deformed or folded radially outward. If the plug 20 is further screwed in, the flat portion 31 of the sealing ring 30 will be reliably pressed between the plugging cover plate 21 and the end face of the pipe mouth of the pressure relief connecting tube 11, thereby achieving a reliable seal. Example
[0013] like Figure 1A , 1B As shown, an annular pipe orifice groove 111 surrounding the pipe orifice is provided on the pipe orifice end face of the pressure relief connecting pipe 11, the direction of the annular pipe orifice groove 111 is consistent with the direction of the pipe orifice, the cross-sectional profile of the sealing ring 30 is convex, the convex ring portion 32 of the sealing ring 30 is embedded in the annular pipe orifice groove 111, and the upper and lower surfaces of the flat portion 31 of the sealing ring 30 are respectively pressed and sealed against the pipe orifice end faces inside and outside the blocking cover plate 21 and the annular pipe orifice groove 111. Example
[0014] like Figure 2A , 2B As shown, the upper notch of the plugging cover plate 21 points to the plugging plate groove 211 of the pressure relief connecting pipe 11, the cross-sectional profile of the sealing ring 30 is convex, the convex ring portion 32 of the sealing ring 30 is embedded in the plugging plate groove 211, and the upper and lower surfaces of the flat portion 31 of the sealing ring 30 are respectively pressed and sealed against the plugging cover plate 21 and the end face of the pressure relief connecting pipe 11 on the inner and outer sides of the plugging plate groove 211.
[0015] The basic shapes of the sealing rings 30 in the above-mentioned embodiments 1 and 2 are the same, except that the recessed portions for accommodating the convex ring portion 32 on the sealing ring 30 are respectively annular pipe orifice grooves 111 and blocking plate grooves 211 . Example
[0016] See also Figure 3A , 3B As shown, the cross-sectional profile of the sealing ring 30 is in the shape of ﹃ or ﹄, and the plugging cover plate 21 and / or the outlet of the pressure relief connecting pipe 11 have a recessed portion for accommodating the convex ring portion 32 .
[0017] like Figure 3A , 3B As shown, the outlet of the pressure relief connecting pipe 11 is a stepped hole 112 , and the raised ring portion 32 on the sealing ring 30 is located on the inner edge of the flat portion 31 , and the raised ring portion 32 is placed at the stepped hole 112 . Example
[0018] like Figure 4A , 4B The pipe plug shown in the figure has a pressure relief connecting pipe 11 on the repairer pipe 10, and the pressure relief connecting pipe 11 is provided with an internal thread. The plug 20 includes a plug cover plate 21, and the outer plate surface of the plug cover plate 21 has a concave and convex portion 22 that is convenient for screwing with a tool. The inner plate surface of the plug cover plate 21 seals one end of a threaded pipe 23, and the other end of the threaded pipe 23 is in a free state and there is a through hole 231 that passes through the pipe wall. A sealing ring 30 is sleeved at the root of the threaded pipe 23 at the junction of the threaded pipe 23 and the plug cover plate 21. The sealing ring 30 is a flat gasket with a square cross-section. The lower plate surface of the plug cover plate 21 has a convex ring 212 protruding downward, and the diameter of the inner wall of the convex ring 212 is larger than the diameter of the outer wall of the pipe end of the pressure relief connecting pipe 11.
[0019] Furthermore, the protrusion height of the protrusion ring 212 is greater than or equal to the thickness of the sealing ring 30 .
[0020] The only difference between this embodiment 4 and embodiments 1, 2 and 3 is that there is a downwardly protruding bead 212 at the edge of the lower plate surface of the blocking cover plate 21, and the sealing ring 30 adopts a simple solution of a flat washer. The bead 212 is used to cover the outer peripheral wall of the sealing ring 30 to limit its radial displacement. The diameter of the inner wall of the bead 212 is larger than the diameter of the outer wall of the pipe end of the pressure relief connecting pipe 11. This ensures that the bead 212 will not interfere with the outer wall of the pipe end of the pressure relief connecting pipe 11 when tightened, and can completely resist the outer peripheral wall of the sealing ring 30.
Claims
1. A pipeline pressure relief plug, wherein a repairer pipeline (10) is provided with a pressure relief connecting pipe (11), the pressure relief connecting pipe (11) is provided with an internal thread, the plug (20) comprises a plug cover plate (21), the outer plate surface of the plug cover plate (21) is provided with a concave-convex portion (22) for convenient screwing with a tool, the inner plate surface of the plug cover plate (21) is sealed with one end of a threaded pipe (23) connected in a plugging manner, the other end of the threaded pipe (23) is free and a through hole (231) is provided on the pipe wall that passes through the pipe wall, a sealing ring (30) is sleeved at the pipe root of the threaded pipe (23) at the joint between the threaded pipe (23) and the plug cover plate (21), characterized in that: The sealing ring (30) comprises a flat portion (31) flush with the plate surface of the plugging cover plate (21); the flat portion (31) has a convex ring portion (32) protruding toward the plugging cover plate (21) or toward the pipe opening of the pressure relief connecting pipe (11); the plugging cover plate (21) and / or the pipe opening of the pressure relief connecting pipe (11) have a recessed portion for accommodating the convex ring portion (32); the upper and lower surfaces of the flat portion (31) of the sealing ring (30) are respectively pressed and sealed against the end surfaces of the pipe opening of the plugging cover plate (21) and the pressure relief connecting pipe (11).
2. The pipeline pressure relief plug according to claim 1 is characterized in that: An annular pipe opening groove (111) surrounding the pipe opening is provided on the pipe opening end surface of the pressure relief connecting pipe (11), the direction of the annular pipe opening groove (111) being consistent with the direction of the pipe opening, the cross-sectional profile of the sealing ring (30) is convex, the convex ring portion (32) of the sealing ring (30) is embedded in the annular pipe opening groove (111), and the upper and lower surfaces of the flat portion (31) of the sealing ring (30) are respectively pressed and sealed against the pipe opening end surfaces inside and outside the blocking cover plate (21) and the annular pipe opening groove (111).
3. The pipeline pressure relief plug according to claim 1 is characterized in that: The plugging plate (21) has a notch on its upper side pointing to the end face of the pipe opening of the pressure relief connecting pipe (11). The cross-sectional profile of the sealing ring (30) is convex. The convex ring portion (32) of the sealing ring (30) is embedded in the plugging plate groove (211). The upper and lower surfaces of the flat portion (31) of the sealing ring (30) are respectively pressed and sealed against the plugging plate (21) and the end face of the pipe opening of the pressure relief connecting pipe (11) on the inner and outer sides of the plugging plate groove (211).
4. The pipeline pressure relief plug according to claim 1 is characterized in that: The cross-sectional profile of the sealing ring (30) is in the shape of ﹃ or ﹄, and a recessed portion for accommodating the convex ring portion (32) is provided at the pipe opening of the blocking cover plate (21) and / or the pressure relief connecting pipe (11).
5. The pipeline pressure relief plug according to claim 4 is characterized in that: The outlet of the pressure relief connecting pipe (11) is a stepped hole (112), the convex ring portion (32) on the sealing ring (30) is located on the inner edge of the flat portion (31), and the convex ring portion (32) on the sealing ring (30) is placed at the stepped hole (112).
6. A pipeline pressure relief plug, wherein a pressure relief connection pipe (11) is provided on a repairer pipeline (10), the pressure relief connection pipe (11) is provided with an internal thread, the plug (20) comprises a plug cover plate (21), the outer plate surface of the plug cover plate (21) is provided with a concave-convex portion (22) for convenient screwing with a tool, the inner plate surface of the plug cover plate (21) seals one end of a threaded pipe (23) connected in a plugging manner, the other end of the threaded pipe (23) is in a free state and a through hole (231) penetrating the pipe wall is provided on the pipe wall, a sealing ring (30) is sleeved at the pipe root of the threaded pipe (23) at the joint between the threaded pipe (23) and the plug cover plate (21), characterized in that: The sealing ring (30) is a flat gasket with a square cross section. A convex ring (212) protruding downward is provided on the plate surface of the lower plate surface of the plug cover plate (21). The diameter of the inner wall of the convex ring (212) is larger than the diameter of the outer wall of the pipe end of the pressure relief connecting pipe (11).
7. The pipeline pressure relief plug according to claim 6, characterized in that: The protruding height of the protruding ring (212) is greater than or equal to the thickness of the sealing ring (30).