PP-R pipe plug structure

Abstract

The utility model belongs to the technical field of pipeline connecting fittings, and relates to a PP-R pipe plug structure. The pipe plug comprises a pipe plug sleeve and a pipe plug cover, the pipe plug cover is matched with the pipe plug sleeve in a threaded connection mode, a threaded penetrating cavity is formed in the pipe plug sleeve, a threaded column matched with the pipe plug sleeve in a threaded connection mode is arranged in the threaded penetrating cavity, and a combined type multiple sealing plug assembly is arranged on the head portion of the threaded column. According to the combined type multi-sealing plug assembly, the mode of a traditional single sealing plug is changed, through cooperative work of the two plug heads and the elastic connecting piece, multi-sealing and self-adaptive sealing of pipelines with different pipe diameters are achieved, and the sealing performance is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe connection fittings and relates to a PP-R pipe plug structure. Background Technology

[0002] In PP-R pipe applications, such as building water supply and drainage, and HVAC systems, pipe plugs play a crucial role in sealing pipe ends. Existing pipe plug structures generally suffer from poor sealing performance, easily leading to leaks due to seal failure during long-term use, thus affecting the normal operation of the entire pipeline system. For example, in the water supply pipes of some older buildings, leaks frequently occur due to poor pipe plug sealing, not only wasting water resources but also potentially causing damp walls and water accumulation on the floor, resulting in considerable inconvenience for users. Furthermore, traditional pipe plug structures lack sufficient strength to withstand large pressure fluctuations within the pipe and the influence of the external environment. Under special operating conditions such as high temperature and high pressure, pipe plugs are prone to damage, requiring frequent replacement, increasing maintenance costs and workload. Therefore, the development of a reliable, high-strength PP-R pipe plug structure is urgently needed.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a novel PPR quick-install pipe plug [application number: 201320440951.1], which includes a connecting part, a sealing part, and a warning part. The connecting part is threaded, the sealing part has an inwardly recessed groove, and the main body of the sealing ring is cylindrical, with one end embedded in the groove and the other end having a flared end. A raised secondary sealing edge is formed on the inner wall of the flared end where it connects with the main body of the sealing ring. However, this solution still struggles to achieve multiple seals on the pipeline and adaptive sealing for pipes of different diameters during use, resulting in relatively poor sealing performance. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a PP-R pipe plug structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A PP-R pipe plug structure includes a pipe plug sleeve and a pipe plug cap. The pipe plug cap is screwed into the pipe plug sleeve. The pipe plug sleeve has a threaded through cavity. A threaded post that is screwed into the pipe plug sleeve is installed in the threaded through cavity. The head of the threaded post is provided with a combined multi-seal plug assembly. The pipe plug cap is provided with a first assembly seal. A second assembly seal is provided between the pipe plug sleeve and the pipe plug cap. The tail of the threaded post is provided with a torsion handle. When the pipe plug cap and the pipe plug sleeve are assembled, the tail of the torsion handle abuts against the inner wall of the pipe plug cap.

[0007] In the aforementioned PP-R pipe plug structure, the combined multi-seal plug assembly includes a first inner pipe plug and a second inner pipe plug disposed at the head of the threaded column, and the first inner pipe plug and the second inner pipe plug are connected by an elastic connector.

[0008] In the above-mentioned PP-R pipe plug structure, the first inner plug has chamfers at both ends, the second inner plug has a chamfer at the head, and a transition cavity is formed between the first inner plug and the second inner plug.

[0009] In the aforementioned PP-R pipe plug structure, the elastic connector includes a connecting rod and a connecting spring disposed between the first inner plug and the second inner plug, wherein the connecting rod and the connecting spring are parallel to each other.

[0010] In the above-mentioned PP-R pipe plug structure, the first pipe plug is provided with two first metal reinforcing plates, and a number of first support columns are provided between the two first metal reinforcing plates.

[0011] In the aforementioned PP-R pipe plug structure, the second pipe plug head is provided with two second metal reinforcing plates, and a number of second support columns are provided between the two second metal reinforcing plates.

[0012] In the aforementioned PP-R pipe plug structure, the threaded column head is provided with a positioning push rod, and the tail of the second inner pipe plug has a pull ring and a positioning hole that matches the shape of the positioning push rod.

[0013] In the above-mentioned PP-R pipe plug structure, the first assembly sealing element includes a pipe opening sealing ring disposed inside the pipe plug cover, and the pipe opening sealing ring has a plurality of deformation extrusion holes.

[0014] In the above-mentioned PP-R pipe plug structure, the second assembly seal includes a sealing gasket disposed between the pipe plug sleeve and the pipe plug cap, wherein one side of the sealing gasket abuts against the pipe plug sleeve and the other side abuts against the pipe plug cap.

[0015] In the above-mentioned PP-R pipe plug structure, the inner wall of the pipe plug cover is provided with a torsion handle receiving cavity, and the position of the torsion handle corresponds to that of the torsion handle receiving cavity.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model changes the traditional single sealing plug mode by setting up a combined multi-sealing plug assembly. Through the coordinated work of two plugs and elastic connectors, multiple sealing and adaptive sealing for pipes of different diameters are achieved, which greatly improves the sealing performance.

[0018] 2. This utility model adds a metal reinforcing plate and a support column inside the plug, which strengthens the pressure resistance of the plug structurally and solves the problem that traditional plugs are easily damaged under high pressure.

[0019] 3. This utility model, through the combined use of multiple sealing components, constructs a comprehensive and multi-layered sealing system from the inside of the pipe to the pipe plug connection, effectively improving the reliability and stability of the pipe plug structure, extending the service life of the pipe plug, and reducing the maintenance cost of the pipeline system.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is an assembly diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the pipe plug sleeve.

[0023] Figure 3 This is a schematic diagram of the pipe plug.

[0024] In the figure: 1. Pipe plug sleeve; 2. Pipe plug cap; 3. Threaded through cavity; 4. Threaded post; 5. Combined multi-seal plug assembly; 6. First assembled seal; 7. Second assembled seal; 8. Torque handle; 9. First inner pipe plug; 10. Second inner pipe plug; 11. Elastic connector; 12. Transition cavity; 13. Connecting rod; 14. Connecting spring; 15. First metal reinforced insert; 16. First support post; 17. Second metal reinforced insert; 18. Second support post; 19. Positioning top rod; 20. Pull ring; 21. Positioning hole; 22. Pipe opening sealing ring; 23. Deformation extrusion hole; 24. Sealing gasket; 25. Torque handle receiving cavity; 100. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-3 As shown, a PP-R pipe plug structure includes a pipe plug sleeve 1 and a pipe plug cap 2. The pipe plug cap 2 is screwed into the pipe plug sleeve 1. The pipe plug sleeve 1 has a threaded through cavity 3. The threaded through cavity 3 is equipped with a threaded post 4 that is screwed into the pipe plug sleeve 1. The head of the threaded post 4 is provided with a combined multi-seal plug assembly 5. The pipe plug cap 2 is provided with a first assembly seal 6. A second assembly seal 7 is provided between the pipe plug sleeve 1 and the pipe plug cap 2. The tail of the threaded post 4 is provided with a torsion handle 8. When the pipe plug cap 2 and the pipe plug sleeve 1 are assembled, the tail of the torsion handle 8 abuts against the inner wall of the pipe plug cap 2.

[0027] In this embodiment, the pipe plug sleeve 1 and the pipe plug cap 2 are tightly assembled by screwing. The pipe plug sleeve 1 has a threaded through cavity 3 machined inside, and the threaded post 4 is matched and installed in the threaded through cavity 3. The position of the threaded post 4 inside the pipe plug sleeve 1 can be adjusted by rotating the threaded post 4. The head of the threaded post 4 is connected to the combined multi-seal plug assembly 5. When the threaded post 4 is screwed in, it can drive the combined multi-seal plug assembly 5 into the pipe 100. The pipe plug cap 2 is provided with a first assembly seal 6, and a second assembly seal 7 is placed between the pipe plug sleeve 1 and the pipe plug cap 2 to provide double sealing protection. The tail of the threaded post 4 is equipped with a... The handle 8, when the pipe plug cap 2 and pipe plug sleeve 1 are assembled, abuts against the inner wall of the pipe plug cap 2, which not only serves as a limit but also facilitates the operator to rotate the threaded column 4. The threaded pipe plug sleeve 1 and pipe plug cap 2 are easy to install and disassemble, and convenient for maintenance and replacement of the pipe plug. The threaded column 4, in conjunction with the threaded through cavity 3, can precisely control the position of the combined multi-seal plug assembly 5. The first assembled sealing element 6 and the second assembled sealing element 7 work together to greatly improve the sealing performance of the pipe plug and effectively prevent the leakage of the medium in the pipeline. The handle 8 provides convenience for operation and enhances the operability of the pipe plug installation.

[0028] Combination Figure 1-3 As shown, the combined multi-sealing plug assembly 5 includes a first inner tube plug 9 and a second inner tube plug 10 disposed at the head of the threaded post 4, and the first inner tube plug 9 and the second inner tube plug 10 are connected by an elastic connector 11.

[0029] Specifically, the first inner plug 9 and the second inner plug 10 are connected to the head of the threaded column 4 by an elastic connector 11. During installation, as the threaded column 4 is screwed into the pipe, the first inner plug 9 and the second inner plug 10, under the action of the elastic connector 11, can adapt to the inner diameter of the pipe and fit tightly against the inner wall of the pipe. This design of double plugs plus elastic connector 11, compared with the traditional single sealing plug, can better adapt to pipes of different diameters, improve the adaptability of the seal, ensure a good sealing effect under various working conditions, and enhance the versatility of the pipe plug.

[0030] Combination Figure 1 , Figure 2 As shown, the first tube plug 9 has chamfers at both ends, the second tube plug 10 has a chamfer at the head, and a transition cavity 12 is formed between the first tube plug 9 and the second tube plug 10.

[0031] In this embodiment, the chamfers at both ends of the first inner tube plug 9 and the chamfer at the head of the second inner tube plug 10 make them easier to insert into the pipe, reducing installation resistance. The transition cavity 12 formed between the first inner tube plug 9 and the second inner tube plug 10 plays a buffering role during the sealing process. When the pressure inside the pipe changes, the transition cavity 12 can alleviate the impact of pressure on the sealing plug. The chamfer design reduces the installation difficulty and improves the installation efficiency. The buffering function of the transition cavity 12 enhances the stability and durability of the sealing plug, extends the service life of the pipe plug, and reduces the sealing failure problem caused by pressure fluctuations.

[0032] The elastic connector 11 includes a connecting rod 13 and a connecting spring 14 disposed between the first inner tube plug 9 and the second inner tube plug 10, wherein the connecting rod 13 and the connecting spring 14 are parallel to each other.

[0033] In this embodiment, the connecting rod 13 and the connecting spring 14 in the elastic connector 11 are parallel to each other and are disposed between the first inner tube plug 9 and the second inner tube plug 10. During installation, the connecting spring 14 can be compressed or stretched, and the connecting rod 13 plays a guiding and stabilizing role, ensuring the stability of the relative position of the first inner tube plug 9 and the second inner tube plug 10, so that the two can fit tightly against the inner wall of the pipe. The cooperation of the connecting rod 13 and the connecting spring 14 ensures the elasticity and stability of the combined multi-sealing plug assembly 5. On the one hand, it realizes adaptive sealing for pipes of different diameters, and on the other hand, it ensures the stable installation of the sealing plug in the pipe, avoiding poor sealing due to shaking.

[0034] Combination Figure 2 As shown, the first tube plug 9 is provided with two first metal reinforcing plates 15, and a number of first support columns 16 are provided between the two first metal reinforcing plates 15.

[0035] In this embodiment, the first pipe plug 9 is provided with two first metal reinforcing plates 15 inside, and multiple first support columns 16 are distributed between the two first metal reinforcing plates 15. When the first pipe plug 9 is subjected to pressure inside the pipe, the first metal reinforcing plates 15 and the first support columns 16 share the pressure, enhancing the pressure resistance of the first pipe plug 9. The structural design of the first metal reinforcing plates 15 and the first support columns 16 greatly improves the structural strength of the first pipe plug 9, enabling it to withstand greater internal pipe pressure, making it less prone to deformation and damage, and ensuring the normal use of the plug in a high-pressure environment.

[0036] The second tube plug 10 is provided with two second metal reinforcing plates 17, and a number of second support columns 18 are provided between the two second metal reinforcing plates 17.

[0037] In this embodiment, the internal structure of the second inner tube plug 10 is similar to that of the first inner tube plug 9. It is provided with two second metal reinforcing plates 17, and several second support columns 18 are arranged between them. During operation, the second metal reinforcing plates 17 and the second support columns 18 work together to withstand the pressure from inside the pipe and maintain the structural stability of the second inner tube plug 10. This structure enhances the compressive strength of the second inner tube plug 10. Together with the reinforcing structure of the first inner tube plug 9, it enables the combined multi-seal plug assembly 5 to adapt to high-pressure environments and improve the reliability and durability of the pipe plug.

[0038] The threaded column 4 has a positioning push rod 19 at its head, and the second tube plug 10 has a pull ring 20 and a positioning hole 21 that matches the shape of the positioning push rod 19 at its tail.

[0039] In this embodiment, the positioning rod 19 at the head of the threaded column 4 is shaped to match the positioning hole 21 at the tail of the second tube plug 10. During installation, the positioning rod 19 is inserted into the positioning hole 21 to achieve precise positioning and connection between the threaded column 4 and the second tube plug 10. The pull ring 20 at the tail of the second tube plug 10 facilitates the operator to pull or fix the second tube plug 10 when installing or removing the plug. The cooperation between the positioning rod 19 and the positioning hole 21 ensures the accuracy and stability of the component installation and avoids loosening during use. The pull ring 20 provides convenience for installation and disassembly operations and reduces the difficulty of operation.

[0040] Combination Figure 2 As shown, the first assembly sealing component 6 includes a pipe opening sealing ring 22 disposed inside the pipe plug 2, and the pipe opening sealing ring 22 has a plurality of deformation extrusion holes 23.

[0041] In this embodiment, the first assembly sealing element 6 is a pipe opening sealing ring 22 disposed inside the pipe plug cover 2. The pipe opening sealing ring 22 has multiple deformation extrusion holes 23. When the pipe plug cover 2 is screwed to the pipe plug sleeve 1, the pipe opening sealing ring 22 is compressed, and the deformation extrusion holes 23 deform, increasing the sealing contact area and improving the sealing effect. The design of the pipe opening sealing ring 22 and the deformation extrusion holes 23 further strengthens the seal at the connection between the pipe plug cover 2 and the pipeline, effectively preventing the medium from leaking between the pipe plug cover 2 and the pipeline port, and improving the overall sealing performance of the pipe plug.

[0042] Combination Figure 1 , Figure 3 As shown, the second assembly sealing component 7 includes a sealing gasket 24 disposed between the pipe plug sleeve 1 and the pipe plug cover 2. One side of the sealing gasket 24 abuts against the pipe plug sleeve 1, and the other side abuts against the pipe plug cover 2.

[0043] In this embodiment, the second assembly seal 7 is a sealing gasket 24 located between the pipe plug sleeve 1 and the pipe plug cap 2. When the pipe plug sleeve 1 and the pipe plug cap 2 are assembled, the sealing gasket 24 is pressed between the two, with one side in close contact with the pipe plug sleeve 1 and the other side in close contact with the pipe plug cap 2, forming a sealing barrier. The sealing gasket 24 fills the gap between the pipe plug sleeve 1 and the pipe plug cap 2, preventing the medium from leaking from the connection between the two. Together with the pipe opening sealing ring 22, it forms a double seal, which greatly improves the sealing reliability of the pipe plug.

[0044] Combination Figure 3 As shown, the inner wall of the pipe plug 2 is provided with a torsion handle receiving cavity 25, and the position of the torsion handle 8 corresponds to that of the torsion handle receiving cavity 25.

[0045] In this embodiment, the inner wall of the pipe plug cover 2 is provided with a torsion handle receiving cavity 25. The position of the torsion handle 8 corresponds to the torsion handle receiving cavity 25. After the pipe plug cover 2 and the pipe plug sleeve 1 are assembled, the tail of the torsion handle 8 is located in the torsion handle receiving cavity 25. The torsion handle receiving cavity 25 plays a role in limiting and storing the torsion handle 8. The torsion handle receiving cavity 25 makes the structure of the pipe plug after assembly more compact and beautiful, while avoiding damage to the torsion handle 8 due to external force collision during use, and also preventing it from affecting the normal operation of other components.

[0046] The working principle of this utility model is as follows:

[0047] During installation, first align the pipe plug sleeve 1 with the PP-R pipe port, ensuring the threaded through cavity 3 is aligned with the pipe port. Then, install the combined multi-seal plug assembly 5 onto the head of the threaded post 4. Insert the positioning rod 19 into the positioning hole 21 of the second inner pipe plug 10 to achieve a fixed connection. Next, screw the threaded post 4 into the threaded through cavity 3. The operator rotates the torque handle 8. As the threaded post 4 is screwed in, the first inner pipe plug 9 and the second inner pipe plug 10 gradually enter the pipe under the action of the connecting rod 13 and the connecting spring 14. Due to the chamfered design at both ends of the first inner pipe plug 9 and the head of the second inner pipe plug 10, the plugs can be smoothly inserted into the pipe. Once the plugs are in the pipe, the connecting spring 14 is compressed, and the first inner pipe plug 9 and the second inner pipe plug 10 tightly adhere to the inner wall of the pipe, forming the first line of defense for sealing.

[0048] The combined multi-seal plug assembly 5 achieves sealing inside the pipe. The transition cavity 12 acts as a buffer, enhancing sealing stability. When the pipe plug 2 is screwed onto the pipe plug sleeve 1, the pipe end sealing ring 22 is compressed, causing the internal deformation compression hole 23 to deform, further enhancing the sealing effect and forming a second line of defense. The sealing gasket 24 between the pipe plug sleeve 1 and the pipe plug 2 is compressed during assembly, ensuring the sealing at the connection and forming a third line of defense.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0050] Although this document frequently uses terms such as pipe plug sleeve 1, pipe plug cap 2, threaded through cavity 3, threaded post 4, combined multi-seal plug assembly 5, first assembled seal 6, second assembled seal 7, torsion handle 8, first inner pipe plug 9, second inner pipe plug 10, elastic connector 11, transition cavity 12, connecting rod 13, connecting spring 14, first metal reinforced panel 15, first support post 16, second metal reinforced panel 17, second support post 18, positioning push rod 19, pull ring 20, positioning hole 21, pipe mouth sealing ring 22, deformation extrusion hole 23, sealing gasket 24, torsion handle receiving cavity 25, and pipe 100, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A PP-R pipe plug structure, comprising a pipe plug sleeve (1) and a pipe plug cap (2), characterized in that, The pipe plug cap (2) is screwed into the pipe plug sleeve (1). The pipe plug sleeve (1) has a threaded through cavity (3). The threaded through cavity (3) is fitted with a threaded post (4) that is screwed into the pipe plug sleeve (1). The head of the threaded post (4) is provided with a combined multi-seal plug assembly (5). The pipe plug cap (2) is provided with a first assembly seal (6). The pipe plug sleeve (1) and the pipe plug cap (2) are provided with a second assembly seal (7). The tail of the threaded post (4) is provided with a torsion handle (8). When the pipe plug cap (2) and the pipe plug sleeve (1) are assembled, the tail of the torsion handle (8) abuts against the inner wall of the pipe plug cap (2).

2. The PP-R pipe plug structure according to claim 1, characterized in that, The combined multi-sealing plug assembly (5) includes a first inner tube plug (9) and a second inner tube plug (10) disposed at the head of the threaded column (4), and the first inner tube plug (9) and the second inner tube plug (10) are connected by an elastic connector (11).

3. The PP-R pipe plug structure according to claim 2, characterized in that, The first tube plug (9) has chamfers at both ends, and the second tube plug (10) has a chamfer at the head. A transition cavity (12) is formed between the first tube plug (9) and the second tube plug (10).

4. The PP-R pipe plug structure according to claim 3, characterized in that, The elastic connector (11) includes a connecting rod (13) and a connecting spring (14) disposed between the first inner tube plug (9) and the second inner tube plug (10), and the connecting rod (13) and the connecting spring (14) are parallel to each other.

5. A PP-R pipe plug structure according to claim 4, characterized in that, The first tube plug (9) is provided with two first metal reinforcing plates (15), and a number of first support columns (16) are provided between the two first metal reinforcing plates (15).

6. A PP-R pipe plug structure according to claim 5, characterized in that, The second tube plug (10) is provided with two second metal reinforcing plates (17), and a number of second support columns (18) are provided between the two second metal reinforcing plates (17).

7. A PP-R pipe plug structure according to claim 6, characterized in that, The threaded column (4) has a positioning rod (19) at its head, and the second tube plug (10) has a pull ring (20) and a positioning hole (21) that matches the shape of the positioning rod (19) at its tail.

8. A PP-R pipe plug structure according to claim 7, characterized in that, The first assembly seal (6) includes a pipe opening seal ring (22) disposed in the pipe plug (2), and the pipe opening seal ring (22) has a plurality of deformation extrusion holes (23).

9. A PP-R pipe plug structure according to claim 8, characterized in that, The second assembly seal (7) includes a sealing gasket (24) disposed between the pipe plug sleeve (1) and the pipe plug cap (2), wherein one side of the sealing gasket (24) abuts against the pipe plug sleeve (1) and the other side abuts against the pipe plug cap (2).

10. A PP-R pipe plug structure according to claim 9, characterized in that, The inner wall of the pipe plug (2) is provided with a torsion handle receiving cavity (25), and the position of the torsion handle (8) corresponds to that of the torsion handle receiving cavity (25).

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