Special plug assembly for self-tapping pipeline repair
Through the design of the special plug assembly for self-tapping pipe repair, the problem that the existing technology cannot adapt to complex specifications and immediate repairs is solved, and the plug and conduction functions of multi-special pipes are realized, which simplifies the maintenance process and improves the maintenance quality. and durability.
Patent Information
- Application Number
- CN202420933151.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing pipeline plug cannot adapt to the damage of the middle section of complex specifications and the inability to switch through the passage and circuit breaker functions, and cannot meet the needs of instant pressure-bearing repair.
A special plug assembly for self-tapping pipe repair is designed, including multi-function plugs and elastic spacers. The connection with pipes of different specifications is achieved through self-tapping external threads and internal threads, and the elastic spacers are combined to achieve fluid isolation and resistance. Hysteresis, current limiting conduction and voltage-with-pressure repair functions.
The cooperation of a single plug assembly and multiple specifications of pipes is achieved, which simplifies the maintenance process, reduces labor costs, ensures maintenance quality and durability, and avoids environmental pollution.
Smart Images
Figure CN222186233U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline plugging, in particular to a special plugging assembly for self-tapping pipeline repair. Background Art
[0002] The pipe plug is connected to the pipe through threads to achieve the functions of pipe leakage prevention, blocking and fluid control. By selecting and matching the pipe plug, the pipe can be temporarily or permanently closed to achieve pipeline maintenance or equipment replacement under special circumstances. At present, pipe plugs have been widely used in various key fields such as medical care, food processing, petrochemicals, energy and power. However, with the complexity of application scenarios, today's pipe plugs can no longer adapt to the stringent working conditions, which is specifically manifested in the following points: 1. The specifications of the pipeline are complex, especially for pipelines with broken middle sections, standardized pipe plugs are difficult to apply; 2. Only a single circuit breaker or passage function can be achieved, and it is almost impossible to switch the passage and circuit breaker functions; 3. It cannot meet the function of immediate pressure repair of suddenly damaged pipelines. Utility Model Content
[0003] The purpose of the utility model is to overcome the defects of the above-mentioned prior art and to provide a self-tapping pipe repair special plug assembly that can meet the blocking and conduction requirements of pipes of different specifications.
[0004] The purpose of the utility model can be achieved through the following technical solutions:
[0005] The utility model provides a plug assembly for self-tapping pipeline repair, which can be connected to pipelines of different specifications. The plug assembly for self-tapping pipeline repair comprises a multifunctional plug and an elastic spacer; the multifunctional plug is composed of an integrally formed small end, a fixed end and a large end; and a through-going tube cavity is arranged inside the small end, the fixed end and the large end.
[0006] The small end has a double-layer structure, which is divided into an outer layer and an inner layer. The outer wall of the outer layer is provided with a small end self-tapping external thread, and the inner wall of the outer layer is provided with a small end self-tapping internal thread; the inner layer is arranged inside the outer layer, and the inner wall and outer wall of the inner layer are smooth; an annular groove for plugging in a pipe is formed between the inner wall of the outer layer and the outer wall of the inner layer; the inner wall of the inner layer is provided with a rounded corner on the side away from the fixed end.
[0007] The outer wall of the big end is provided with a big end self-tapping external thread, and the inner wall of the big end is provided with a big end self-tapping internal thread.
[0008] The fixed end is an equilateral polygon structure, the distance between any two parallel sides of the fixed end is greater than the major diameter of the large end self-tapping external thread, and an inner chamfer is provided on one side of the fixed end close to the small end.
[0009] The elastic spacer is a semi-connected multi-petal structure, and the elastic spacer is detachably installed inside the fixed end.
[0010] Furthermore, a cross section of one side of the small end away from the fixed end is a flat annular surface.
[0011] Furthermore, a limiting groove is provided on one side of the annular groove close to the fixed end to prevent tapping chips from entering the interior of the pipe.
[0012] Furthermore, there is a height difference between the tube walls on both sides of the annular groove, so that the elastic spacer is easy to deform.
[0013] Furthermore, the limiting groove is a chip groove, and the width of the chip groove is greater than the width of the annular groove. During the self-tapping process, the chip groove can prevent tapping chips from entering the interior of the pipe.
[0014] Furthermore, the number of petals of the elastic spacer is ≥2, and there are a plurality of narrow slits on the elastic spacer, and the width of the narrow slits is ≤0.1 mm.
[0015] Preferably, the elastic spacer has three petals, and the width of the narrow slit is 0.08 mm.
[0016] Furthermore, the large end is provided with a plurality of limiting feet on a side away from the fixed end, and the limiting feet facilitate the placement and installation of an elastic spacer, and the outer diameter of the elastic spacer is smaller than the major diameter of the internal thread of the large end.
[0017] Furthermore, the number of the limit stop feet is 0 to 8, and when two multifunctional plugs are used in combination, one of the multifunctional plugs has no limit stop foot.
[0018] Preferably, three position-limiting feet are provided.
[0019] Furthermore, the fixed end is a hexagonal structure, and the distance between any two parallel sides of the fixed end is greater than 10% of the major diameter of the external thread of the large end.
[0020] Furthermore, the multifunctional plug is made of a high-hardness alloy material with a hardness HRC not less than 52.
[0021] Preferably, the multifunctional plug is made of M2 high-speed steel with a hardness of HRC 61.
[0022] Furthermore, when two multifunctional plugs are used in combination, the small-end self-tapping external thread can be inserted into the other large-end self-tapping internal thread.
[0023] Furthermore, when in use, the self-tapping external thread of the small end can cooperate with the self-tapping internal thread of the large end to realize the combined connection of the multifunctional plug; the flat annular surface at the top of the small end abuts against the pressed elastic spacer to realize the isolation and blocking function of the pipeline fluid. When the thread is further screwed in, the top of the small end will be higher than the internal annular surface of the large end, squeezing the elastic spacer petals to deform, realizing the flow-limiting conduction and pressure repair functions of the fluid in the pipeline. Use a tool (such as a torque wrench) to apply torque to the fixed end, and a rotational cutting action is formed on the wall surface in contact with the self-tapping thread, and a thread that cooperates with the self-tapping thread is formed on the wall surface, and the self-tapping threaded screw connection between the multifunctional plug and the pipeline is realized. The multifunctional plug has two sets of internal and external self-tapping threads, and can be connected to pipelines of different specifications. The outer threads of the multifunctional plug are assembled with the inner wall of the pipeline, and the inner threads are assembled with the outer wall of the pipeline.
[0024] Compared with the prior art, the utility model has the following advantages:
[0025] (1) The utility model realizes that a single plug assembly can be used with pipes of various specifications through the plug structure design and the application of self-tapping threads. The plug assembly for self-tapping pipe repair is easy to install, shortens maintenance time, and reduces labor costs.
[0026] (2) The utility model can achieve the isolation, blocking, flow limiting and conduction of pipeline fluid and the pressure repair function after pipeline damage through the combined use of the plug and the elastic spacer; it can fit tightly to the inner wall of the pipeline to prevent water leakage and gas leakage, and ensure the quality and effect of the repair.
[0027] (3) The plug assembly provided by the utility model is made of high-strength material, has good corrosion resistance and oxidation resistance, can withstand water pressure and air pressure for a long time, and ensures the durability and reliability of maintenance.
[0028] (4) The use of the plug assembly provided by the utility model avoids the environmental pollution and safety hazards that may be caused by traditional welding and cutting methods. It can be repaired without damaging the pipeline, reducing the negative impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a structural schematic diagram of a plug assembly according to Embodiment 1 of the present utility model;
[0030] Figure 2 This is a schematic structural diagram of an elastic spacer in Example 1 of the utility model;
[0031] Figure 3 This is a schematic structural diagram of a flat ring surface in Example 1 of the utility model;
[0032] Figure 4 This is a schematic diagram of the structure of the assembled installation of the plug assembly in Example 1 of the utility model;
[0033] Figure 5 This is a schematic diagram of the partial structure of the passage formed after the installation of the embodiment 1 of the utility model;
[0034] Figure 6 This is a front view of the plug assembly of Example 1 of the utility model;
[0035] Figure 7 It is a left side view of the plug assembly of Example 1 of the utility model;
[0036] Figure 8 It is a right side view of the plug assembly of Example 1 of the utility model;
[0037] Fig. 9 This is a structural schematic diagram of the large end plugged into the pipe when the embodiment 1 of the utility model is working;
[0038] Fig.10 This is a schematic diagram of the structure of the small end plug-in pipe when the embodiment 2 of the utility model is working.
[0039] Numbers in the figure: 1. Self-tapping external thread at small end; 2. Self-tapping internal thread at small end; 3. Self-tapping external thread at large end; 4. Self-tapping internal thread at large end; 5. Fixed end; 6. Limiting foot; 7. Inner annular surface at large end; 8. Inner chamfer; 9. Chip groove; 10. Flat annular surface; 11. Narrow gap; 12. Elastic spacer; 13. Annular groove; 14. First connecting pipe; 15. Second connecting pipe. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0042] In the description of the embodiments of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.
[0043] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0044] Example 1
[0045] This embodiment provides a self-tapping pipe repair plug assembly that can meet the blocking and conduction requirements of pipes of different specifications. This embodiment performs a pressurized repair operation on non-end damage of 304 stainless steel pipes.
[0046] like Figure 1 As shown, the plug assembly includes a multifunctional plug and an elastic spacer 12, and the multifunctional plug consists of an integrally formed small end, a fixed end 5 and a large end. A through-going lumens are arranged inside the small end, the fixed end 5 and the large end. The small end has a double-layer structure, which is divided into an outer layer and an inner layer. The outer wall of the outer layer is provided with a small end self-tapping external thread 1, and the inner wall of the outer layer is provided with a small end self-tapping internal thread 2; the inner layer is arranged inside the outer layer, and the inner wall and outer wall of the inner layer are smooth; an annular groove 13 for plugging in pipes is formed between the inner wall of the outer layer and the outer wall of the inner layer; the inner wall of the inner layer is provided with a rounded corner on the side away from the fixed end 5. The cross-section of the side of the small end away from the fixed end 5 is a flat annular surface 10, as shown Figure 3 As shown. The outer wall of the large end is provided with a large end self-tapping external thread 3, and the inner wall of the large end is provided with a large end self-tapping internal thread 4. The fixed end 5 is an equilateral hexagonal structure, the inner circumference of the fixed end 5 is circular, the distance between any two parallel sides of the fixed end 5 is greater than the major diameter of the large end self-tapping external thread 3, and the fixed end 5 is provided with an inner chamfer 8 on the side close to the small end. There are three through narrow slits 11 ( Figure 2), forming a semi-connected three-petal structure, the elastic spacer 12 is detachably installed inside the fixed end 5. A chip groove 9 is provided on the side of the annular groove 13 close to the fixed end 5 to prevent tapping chips from entering the pipe. The chip groove 9 can prevent tapping chips from entering the pipe during the self-tapping process. The elastic spacer 12 almost blocks the flow of fluid without external force.
[0047] The multifunctional plug is made of SKD11 high-carbon high-chromium alloy tool steel, HRC≥62, the elastic spacer 12 is made of 304 stainless steel, the thickness of the elastic spacer 12 is 0.3mm, and it is equally divided into 6 petals, and the width of the narrow gap 11 is 0.08mm.
[0048] When in use, first use a cutting tool to cut the damaged pipe flat, and install the elastic spacer 12 into the inner ring surface 7 of the large end. Figure 4 As shown, two multifunctional plugs are combined and connected. The multifunctional plug assembled with the pipe to be repaired has three limit pins 6, and the other multifunctional plug has no limit pins. The small end of the plug with the limit pin 6 is pressed with an elastic spacer 12, and the limit pin 6 at the bottom of the large end is inserted into the stainless steel pipe for centering. After the large end self-tapping external thread 3 contacts the end face of the pipe, a wrench is used to apply torque to the hexagonal fixed end 5, so that the large end self-tapping external thread 3 is rotated and cut on the inner wall of the first connecting pipe 14 (stainless steel pipe) to form a thread, and a thread fit is formed between the self-tapping thread and the inner wall of the stainless steel pipe until the fixed end 5 contacts the end face of the stainless steel pipe ( Fig. 9 ), at this time, the flow restriction and retardation of the fluid in the stainless steel pipeline has been achieved. After the small end of the plug without a stopper is connected to the pipeline, a wrench is used to apply torque to the fixed end 5, the top of the small end is higher than the internal annular surface of the large end, the elastic spacer 12 is deformed, and the pipeline is connected, thereby realizing the pressure repair of the damaged stainless steel pipeline ( Figure 5 ).
[0049] Example 2
[0050] This embodiment provides a self-tapping pipe repair special plug assembly that can meet the blocking and conduction requirements of pipes of different specifications. This embodiment is used to plug copper pipes that are not damaged at the end.
[0051] The self-tapping pipe repair special plug assembly provided in this embodiment includes a multifunctional plug and an elastic spacer 12. The multifunctional plug assembly is structurally optimized and weight-reduced by 3D printing to shorten the manufacturing time. The 3D printing technology is the selective laser melting technology (SLM), the consumables are GH4169, and the powder particle size is 15-53 μm. The multifunctional plug and the elastic spacer 12 are integrated by 3D printing technology, the multifunctional plug model is modified, there is no large end limit foot 6, and the length of the large end and the small end is shortened. By measuring the inner and outer diameters and wall thickness of the second connecting pipe 15 (red copper pipe) and other parameters, the width of the multifunctional plug annular groove 13 is optimized; the elastic spacer 12 is directly formed on the flat annular surface 10, with a thickness of 0.2 mm, divided into 3 petals, and the narrow slit 11 is set to 0.05 mm to prepare for the later conduction treatment. When in use, first use a cutting tool to cut the damaged pipe flat, use the small end to connect it to the second connecting pipe 15, and after the second connecting pipe 15 is centered with the small end annular groove 13, use a wrench to apply torque to the hexagonal fixed end 5, so that the small end and the second connecting pipe 15 are assembled through the small end self-tapping internal thread 2, and finally until the pipe section abuts the bottom of the annular groove 13, the fluid in the second connecting pipe 15 is blocked and isolated.
[0052] The above is only a preferred specific implementation manner of the present utility model, and the protection scope of the present utility model is not limited thereto. Any simple change or equivalent replacement of the technical solution that can be obviously obtained by any technician familiar with the technical field within the technical scope disclosed in the present utility model falls within the protection scope of the present utility model.
Claims
1. A plug assembly for self-tapping pipe repair, characterized in that: It comprises a multifunctional plug and an elastic spacer (12); the multifunctional plug is composed of a small end, a fixed end (5) and a large end which are integrally formed; a through-going lumen is arranged inside the small end, the fixed end (5) and the large end; The small end is a double-layer structure, the outer wall of the outer layer is provided with a small end self-tapping external thread (1), and the inner wall of the outer layer is provided with a small end self-tapping internal thread (2); the inner layer is arranged inside the outer layer, and the inner wall and outer wall of the inner layer are smooth; an annular groove (13) for plugging in a second connecting pipe (15) is formed between the inner wall of the outer layer and the outer wall of the inner layer; The outer wall of the large end is provided with a large end self-tapping external thread (3), and the inner wall of the large end is provided with a large end self-tapping internal thread (4); the large end can be plugged into the first connecting pipe (14); The fixed end (5) is an equilateral polygonal structure; the elastic spacer (12) is a semi-connected multi-petal structure, and the elastic spacer (12) is detachably mounted inside the fixed end (5).
2. A self-tapping pipe repair plug assembly according to claim 1, characterized in that: The number of petals of the elastic spacer (12) is ≥2, and the elastic spacer (12) is provided with a plurality of narrow slits (11).
3. A self-tapping pipe repair plug assembly according to claim 1, characterized in that: A rounded corner is provided on a side of the inner wall of the inner layer away from the fixed end (5).
4. A self-tapping pipe repair plug assembly according to claim 1, characterized in that: A limiting groove is provided on one side of the annular groove (13) close to the fixed end (5) to prevent tapping chips from entering the interior of the pipe.
5. A self-tapping pipe repair plug assembly according to claim 4, characterized in that: The limiting groove is a chip groove (9), and the width of the chip groove (9) is greater than the width of the annular groove (13).
6. A plug assembly for self-tapping pipe repair according to claim 1, characterized in that: The large end is provided with a plurality of limiting abutment feet (6) on a side away from the fixed end (5).
7. The self-tapping pipe repair plug assembly according to claim 1, characterized in that: The small-end self-tapping external thread (1) can be inserted into another large-end self-tapping internal thread (4).
8. The plug assembly for self-tapping pipe repair according to claim 1, characterized in that: The distance between any two parallel sides of the equilateral polygonal structure of the fixed end (5) is greater than the major diameter of the large-end self-tapping external thread (3), and an inner chamfer (8) is provided on one side of the fixed end (5) close to the small end.
9. The self-tapping pipe repair plug assembly according to claim 1, characterized in that: The fixed end (5) is a hexagonal structure.
10. The plug assembly for self-tapping pipe repair according to claim 1, characterized in that: The multifunctional plug is made of a high-hardness alloy material with a hardness HRC not less than 52.