Plugging device for polyethylene gas pipe

Abstract

The utility model relates to the technical field of plugging devices, and discloses a plugging device for a polyethylene gas pipe, which comprises a plug I and a plug II, the plug II is connected in the plug I in a sliding manner, the plug I is internally in threaded connection with a threaded column, one end of the threaded column is fixedly connected with a handle, the threaded column is arranged in the plug I in a penetrating manner, and the handle is fixedly connected with the handle. And a transmission assembly is arranged at the other end of the threaded column and comprises a connecting shaft and a conical column, one end of the connecting shaft is fixedly connected to the other end of the threaded column, the conical column is rotationally connected to the outer wall of the connecting shaft, and a fixing plate is fixedly connected to the interior of the second plug. According to the pipeline plugging device, the handle is rotated to drive the threaded column to be screwed in, the threaded column drives the connecting shaft and the conical column to move forwards, the conical column generates radial thrust on the wedge-shaped block through the special conical structure of the conical column, the wedge-shaped block drives the positioning block to move outwards, and the effect that the plugging device can be rapidly fixed to the inner walls of pipelines of various sizes is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plugging devices, in particular to a plugging device for a polyethylene gas pipe. Background Art

[0002] In the field of gas transportation and pipeline maintenance, polyethylene (PE) gas pipes are widely used due to their corrosion resistance and long service life. However, during pipeline construction, maintenance or emergency accident handling, rapid and reliable sealing of gas pipes is a key link to ensure operational safety and efficiency. Traditional sealing methods are often difficult to adapt to the characteristics of polyethylene pipes, and can easily cause problems such as poor sealing and pipeline damage. The development of a sealing device that can be quickly fixed on the inner wall of pipes of various sizes, is easy to operate and has reliable sealing is of great significance for improving the level of gas pipeline maintenance, reducing safety risks, and reducing environmental pollution and economic losses caused by gas leaks.

[0003] Existing gas pipeline plugging devices mainly adopt the following technical solutions. One is a flange-connected plugger, which achieves sealing by installing flanges at both ends of the pipeline and fastening them with bolts. This method requires pre-reserved flange interfaces on the pipeline, which has high construction costs and poor flexibility. The second is a rubber plug plug, which directly inserts a rubber plug into the pipeline and achieves sealing by relying on the elastic deformation of the rubber.

[0004] However, the existing polyethylene gas pipe sealing device lacks flexible pipe diameter adaptation and reliable inner wall fixing mechanism, which makes it difficult to quickly and stably fix on the inner wall of pipes of various sizes, and is prone to problems such as poor sealing and device falling off. This defect is particularly obvious in actual application scenarios. For example, at the gas pipeline emergency repair site, faced with polyethylene pipes of different specifications, traditional sealing devices often need to carry multiple models as spares, which increases equipment costs and transportation burdens. Even if a plugger of similar size is barely used, it is easy to cause gas leakage due to poor sealing. For this reason, a polyethylene gas pipe sealing device is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a polyethylene gas pipe sealing device, which aims to improve the problem that the sealing device in the prior art lacks flexible pipe diameter adaptation and reliable inner wall fixing mechanism, resulting in difficulty in quickly and stably fixing on the inner walls of pipes of various sizes.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A plugging device for a polyethylene gas pipe comprises a plug 1 and a plug 2, wherein the plug 2 is slidably connected to the inside of the plug 1, a threaded column is threadedly connected to the inside of the plug 1, a handle is fixedly connected to one end of the threaded column, the threaded column is inserted into the inside of the plug 1, and a transmission assembly is arranged at the other end of the threaded column;

[0008] The transmission assembly includes a connecting shaft and a tapered column, one end of the connecting shaft is fixedly connected to the other end of the threaded column, the tapered column is rotatably connected to the outer wall of the connecting shaft, a fixed plate is fixedly connected to the inside of the second plug, the tapered column is slidably connected to the inside of the fixed plate, a wedge block is slidably connected to the inside of the fixed plate, the tapered column contacts the wedge block, a positioning block is fixedly connected to one side of the wedge block, a sliding groove is provided inside the second plug, the positioning block is slidably connected to the fixed plate and the inside of the sliding groove, a support plate is fixedly connected to one side of the fixed plate, and a reset assembly is provided inside the wedge block.

[0009] As a further description of the above technical solution:

[0010] The reset assembly includes a support column and a spring. The support column is slidably connected to the inside of the wedge block. One end of the support column is fixedly connected to one side of the support plate. The spring is set on the outer wall of the support column. The two ends of the spring are respectively fixedly connected to the support plate and the inside of the wedge block.

[0011] As a further description of the above technical solution:

[0012] A sealing ring is arranged inside the first plug, a sealing groove is arranged on the outer wall of the second plug, and the sealing ring is embedded in the sealing groove.

[0013] As a further description of the above technical solution:

[0014] A sealing ring is fixedly connected inside the second plug, and one end of the sealing ring is in contact with the inner wall of the first plug.

[0015] As a further description of the above technical solution:

[0016] A second spring is arranged inside the second plug, one end of the second spring is fixedly connected to the inside of the second plug, and the other end of the second spring is in contact with the inner wall of the first plug.

[0017] As a further description of the above technical solution:

[0018] A screw hole is provided inside the first plug, and a screw is arranged inside the first plug.

[0019] As a further description of the above technical solution:

[0020] One end of the screw is fixedly connected with a rotating rod, and the screw is threadedly connected inside the threaded hole.

[0021] As a further description of the above technical solution:

[0022] A positioning hole is provided on the outer wall of the second plug, and the screw is slidably connected inside the positioning hole.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the utility model, by rotating the handle to drive the threaded column to screw in, the threaded column drives the connecting shaft and the conical column to move forward. The conical column uses its special conical structure to generate a radial thrust on the wedge block, so that the wedge block drives the positioning block to move outwards. These structures work together to achieve the effect that the plugging device can be quickly fixed on the inner walls of pipes with various sizes, and solve the problem that the plugging device is difficult to be quickly and stably fixed on the inner walls of pipes with various sizes due to the lack of a flexible pipe diameter adaptability and a reliable inner wall fixing mechanism, thereby improving the applicability of the plugging device.

[0025] 2. In the utility model, by rotating the rotating rod to make the screw rotate threadedly in the threaded hole, the firm connection between the first plug and the second plug is realized. Reversely rotating the rotating rod can separate the two. At the same time, the sealing ring is fitted with the sealing groove, and the sealing ring ensures sealing under the pre-tightening force of the second spring. These structures cooperate with each other to achieve the function of facilitating the maintenance, disassembly and assembly of the plugging device and ensuring the sealing effect, and solve the problems that the traditional plugging device has a fixed structure, is difficult to carry out internal maintenance and component replacement, and has poor sealing performance at the connection part, thereby improving the flexibility of the plugging device. Description of the Drawings

[0026] Figure 1 is a three-dimensional schematic diagram of the plugging device for polyethylene gas pipelines proposed by the utility model;

[0027] Figure 2 is a schematic diagram of the internal structure of the second plug of the plugging device for polyethylene gas pipelines proposed by the utility model;

[0028] Figure 3 is a schematic diagram of the conical column structure of the plugging device for polyethylene gas pipelines proposed by the utility model;

[0029] Figure 4 is a schematic diagram of the screw structure of the plugging device for polyethylene gas pipelines proposed by the utility model;

[0030] Figure 5 is a schematic diagram of the positioning block structure of the plugging device for polyethylene gas pipelines proposed by the utility model.

[0031] Legend Explanation:

[0032] 1. Plug one; 2. Plug two; 3. Threaded post; 4. Handle; 5. Connecting shaft; 6. Tapered post; 7. Fixed plate; 8. Wedge block; 9. Positioning block; 10. Slide groove; 11. Support plate; 12. Support post; 13. Spring one; 14. Sealing ring; 15. Sealing groove; 16. Sealing gasket; 17. Spring two; 18. Threaded hole; 19. Screw; 20. Rotating rod; 21. Positioning hole. Detailed implementation manner

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Refer to Figures 1 - 5 , an embodiment provided by the present invention: a plugging device for polyethylene gas pipes, including plug one 1 and plug two 2. Plug two 2 is slidably connected inside plug one 1. Threaded post 3 is threadedly connected inside plug one 1. One end of threaded post 3 is fixedly connected with handle 4. Handle 4 provides a tool for users to facilitate operation and control, enabling the entire device to be used efficiently in a complex environment. Threaded post 3 penetrates inside plug one 1, passes through plug one 1, and is connected to a transmission component through the other end. A transmission component is provided at the other end of threaded post 3;

[0035] The transmission component includes connecting shaft 5 and tapered post 6. One end of connecting shaft 5 is fixedly connected to the other end of threaded post 3. Tapered post 6 is rotatably connected to the outer wall of connecting shaft 5, and can be precisely adjusted and positioned as needed to ensure the reliability of the plugging effect. Fixed plate 7 is fixedly connected inside plug two 2. Tapered post 6 is slidably connected inside fixed plate 7. Wedge block 8 is slidably connected inside fixed plate 7. Tapered post 6 is in contact with wedge block 8. One side of wedge block 8 is fixedly connected with positioning block 9. Slide groove 10 is opened inside plug two 2. Positioning block 9 is slidably connected inside fixed plate 7 and slide groove 10. Through the sliding connection, positioning block 9 can move freely inside fixed plate 7 and slide groove 10, thereby fixing the position of plug two 2. One side of fixed plate 7 is fixedly connected with support plate 11. A reset component is provided inside wedge block 8. The reset component includes support post 12 and spring one 13. Support post 12 is slidably connected inside wedge block 8. One end of support post 12 is fixedly connected to one side of support plate 11. Spring one 13 is sleeved on the outer wall of support post 12. Both ends of spring one 13 are respectively fixedly connected inside support plate 11 and wedge block 8, ensuring that positioning block 9 can automatically return to its original position after use, avoiding jamming.

[0036] Refer to Figures 1 - 4, a sealing ring 14 is arranged inside the first plug 1, a sealing groove 15 is arranged on the outer wall of the second plug 2, the sealing ring 14 is fitted with the sealing groove 15, and the sealing ring 14 and the sealing groove 15 are tightly fitted, effectively preventing gas leakage. A sealing ring 16 is fixedly connected inside the second plug 2, one end of the sealing ring 16 is in contact with the inner wall of the first plug 1. A second spring 17 is arranged inside the second plug 2, one end of the second spring 17 is fixedly connected inside the second plug 2, and the other end of the second spring 17 is in contact with the inner wall of the first plug 1, which can further enhance the sealing performance through the elastic force. A screw hole 18 is opened inside the first plug 1, a screw 19 is arranged inside the first plug 1, one end of the screw 19 is fixedly connected with a rotating rod 20, the screw 19 is threadedly connected inside the screw hole 18, a positioning hole 21 is arranged on the outer wall of the second plug 2, and the screw 19 is slidably connected inside the positioning hole 21. By rotating the rotating rod 20, the screw 19 is withdrawn from the positioning hole 21, releasing the fixed state of the second plug 2, facilitating the operator to separate the two and perform maintenance operations on the plugging device.

[0037] Working principle: When it is necessary to plug the polyethylene gas pipe, first insert one end of the second plug 2 into the pipe, and then rotate the handle 4. Since the threaded column 3 is threadedly connected inside the first plug 1, rotating the handle 4 will cause the threaded column 3 to screw into the first plug 1. The threaded column 3 drives the connecting shaft 5 and the conical column 6 to move forward together. As the conical column 6 slides and advances inside the fixed plate 7, due to its special conical structure, it will generate a radial thrust on the wedge block 8 in contact with it, causing the wedge block 8 to slide inside the fixed plate 7. At the same time, the positioning block 9 slides inside the fixed plate 7 and the chute 10 along with the wedge block 8. After the wedge block 8 is pushed by the conical column 6, it overcomes the elastic force of the first spring 13 in the reset assembly and moves outward, causing the positioning block 9 to slide out of the second plug 2 and then get stuck on the inner wall of the polyethylene gas pipe for fixation. When it is necessary to disassemble the plugging device, rotate the handle 4 in the reverse direction, and the threaded column 3 drives the conical column 6 to retreat. At this time, the first spring 13 will push the wedge block 8 to reset, causing the positioning block 9 to retract into the second plug 2, facilitating the removal of the plugging device from the pipe, thus achieving the effect that the plugging device can be quickly fixed on the inner walls of pipes with various sizes;

[0038] When the inside of the plugging device needs to be maintained, disassembled and assembled, during installation, slide the second plug 2 into the first plug 1. When the second plug 2 slides to a proper position inside the first plug 1, align the screw 19 with the positioning hole 21 on the outer wall of the second plug 2, and by rotating the rotating rod 20, make the screw 19 threadedly rotate in the screw hole 18 until one end of the screw 19 slides into the positioning hole 21. At this time, the screw 19 restricts the relative sliding of the second plug 2 inside the first plug 1, firmly connecting the first plug 1 and the second plug 2 together to ensure that there is no relative displacement between the two during the plugging process, thereby maintaining the stability of the entire plugging device structure. During this process, the sealing ring 14 provided inside the first plug 1 is fitted with the sealing groove 15 on the outer wall of the second plug 2 to form a sealing line of defense to prevent gas from leaking from the connection gap between the first plug 1 and the second plug 2. At the same time, one end of the sealing ring 16 fixedly connected inside the second plug 2 is in contact with the inner wall of the first plug 1, ensuring the sealing effect between the two during the relative sliding of the second plug 2 and the first plug 1. At the same time, one end of the spring two 17 inside the second plug 2 is fixed inside the second plug 2, and the other end is in contact with the inner wall of the first plug 1, providing a certain pre-tightening force for the sealing ring 16 to further enhance the sealing performance and prevent gas from leaking from the contact area between the two. When disassembling the plugging device, rotate the rotating rod 20 in the reverse direction to make the screw 19 withdraw from the positioning hole 21. At this time, the second plug 2 can slide freely inside the first plug 1, facilitating the separation of the two for operations such as maintaining and replacing components of the plugging device.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plugging device for a polyethylene gas pipe, comprising a plug 1 (1) and a plug 2 (2), characterized in that: The second plug (2) is slidably connected to the inside of the first plug (1); a threaded column (3) is threadedly connected to the inside of the first plug (1); one end of the threaded column (3) is fixedly connected to a handle (4); the threaded column (3) is inserted into the inside of the first plug (1); and a transmission component is arranged at the other end of the threaded column (3); The transmission assembly comprises a connecting shaft (5) and a tapered column (6), one end of the connecting shaft (5) is fixedly connected to the other end of the threaded column (3), the tapered column (6) is rotatably connected to the outer wall of the connecting shaft (5), a fixing plate (7) is fixedly connected inside the second plug (2), the tapered column (6) is slidably connected inside the fixing plate (7), a wedge block (8) is slidably connected inside the fixing plate (7), the tapered column (6) is in contact with the wedge block (8), a positioning block (9) is fixedly connected to one side of the wedge block (8), a sliding groove (10) is provided inside the second plug (2), the positioning block (9) is slidably connected to the fixing plate (7) and the sliding groove (10), a support plate (11) is fixedly connected to one side of the fixing plate (7), and a reset assembly is arranged inside the wedge block (8).

2. The polyethylene gas pipe plugging device according to claim 1, characterized in that: The reset assembly comprises a support column (12) and a spring 1 (13); the support column (12) is slidably connected to the inside of the wedge block (8); one end of the support column (12) is fixedly connected to one side of the support plate (11); the spring 1 (13) is sleeved on the outer wall of the support column (12); and the two ends of the spring 1 (13) are respectively fixedly connected to the support plate (11) and the inside of the wedge block (8).

3. The polyethylene gas pipe plugging device according to claim 1, characterized in that: The first plug (1) is provided with a sealing ring (14) inside, the second plug (2) is provided with a sealing groove (15) on its outer wall, and the sealing ring (14) is engaged with the sealing groove (15).

4. The polyethylene gas pipe plugging device according to claim 3, characterized in that: A sealing ring (16) is fixedly connected inside the second plug (2), and one end of the sealing ring (16) is in contact with the inner wall of the first plug (1).

5. The polyethylene gas pipe plugging device according to claim 4, characterized in that: A second spring (17) is arranged inside the second plug (2), one end of the second spring (17) is fixedly connected inside the second plug (2), and the other end of the second spring (17) is in contact with the inner wall of the first plug (1).

6. The polyethylene gas pipe plugging device according to claim 1, characterized in that: A screw hole (18) is provided inside the plug head 1 (1), and a screw (19) is arranged inside the plug head 1 (1).

7. The polyethylene gas pipe plugging device according to claim 6, characterized in that: One end of the screw (19) is fixedly connected to a rotating rod (20), and the screw (19) is threadedly connected inside the screw hole (18).

8. The polyethylene gas pipe plugging device according to claim 7, characterized in that: The outer wall of the second plug (2) is provided with a positioning hole (21), and the screw (19) is slidably connected inside the positioning hole (21).

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