Natural gas pipeline end plugging structure
By using a combination of an expansion ring structure, a push rod, and heat shrink tape, a convenient sealing of the natural gas pipeline end is achieved, solving the problems of complex operation and low efficiency in existing technologies, improving construction efficiency, and reducing labor intensity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI INSTALLATION ENG
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-08
AI Technical Summary
In existing natural gas pipeline construction, pipe end sealing operations are complex and inefficient, steel plates cannot be reused, and operators experience high labor intensity.
It adopts an expansion ring structure, which is broken into two ends by a notch and threaded to the push rod. Combined with a baffle and heat shrink tape, it achieves pipe sealing. When disassembling, only the heat shrink tape needs to be removed, and the expansion ring can be reused.
It simplifies the pipe end sealing operation, improves construction efficiency, reduces the labor intensity of operators, and the expansion ring can be reused.
Smart Images
Figure CN224214953U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipeline construction technology, specifically relating to a natural gas pipeline end sealing structure. Background Technology
[0002] Natural gas engineering construction typically takes place in the field. Natural gas pipeline flanges are assembled and welded in sections on the ground. After welding, flaw detection, and corrosion protection, the pipeline is then transported into the excavated trench. To prevent groundwater or silt from entering the pipeline and causing difficulties in later pipeline cleaning, temporary seals are usually installed at the pipeline ends. These seals are then removed during later operations. Current sealing methods often involve welding steel plates to the pipeline ends to achieve a seal. However, this method requires the steel plates to be removed later, making the plates non-reusable, complex, inefficient, and physically demanding for operators. Utility Model Content
[0003] This utility model provides a pipe end sealing structure for natural gas pipelines, which aims to solve the problems of complex pipe end sealing operations and low construction efficiency in the construction of natural gas pipelines in the prior art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a natural gas pipeline end-sealing structure, comprising:
[0005] An expansion ring, wherein a notch is provided on the expansion ring, the notch being used to break the expansion ring into two ends;
[0006] The push rod has two ends threadedly connected to two end caps, and the external threads at both ends of the push rod rotate in opposite directions.
[0007] A baffle is installed at one end of the expansion ring and covers the end of the expansion ring;
[0008] Heat shrink tape is used to wrap between the baffle and the pipe to seal the gap between them.
[0009] In one possible implementation, multiple arc-shaped plates are bent to the same side at the outer edge of the baffle, and the multiple arc-shaped plates are slidably disposed inside the expansion ring.
[0010] In one possible implementation, the push rod is located between two adjacent arc-shaped plates.
[0011] In one possible implementation, the side of the arc-shaped plate away from the baffle is bent outward to provide a mounting plate, and the inner wall of the expansion ring is provided with a slot for accommodating the mounting plate.
[0012] In one possible implementation, the end of the expansion ring on which the baffle is mounted is bent outward and provided with a limiting ring for abutting against the end face of the pipe.
[0013] In one possible implementation, the limiting ring is recessed with an annular groove for accommodating the end of the pipe.
[0014] In one possible implementation, two threaded sleeves that are threadedly connected to the push rod are fixedly installed on the expansion ring. The two threaded sleeves are located at the two ends respectively and are located on the inner wall of the expansion ring.
[0015] In one possible implementation, the threaded sleeve is provided with a limiting platform for abutting against the end of the expansion ring.
[0016] The solution shown in this application, compared with the prior art, incorporates an expansion ring with a notch that breaks the ring into two ends. A push rod is threaded onto each end, and rotating the push rod moves the two ends away from each other. A baffle is also provided at one end of the expansion ring, with its outer diameter matching the inner diameter of the pipe opening. Heat-shrink tape is also provided at the connection between the baffle and the pipe opening. In use, the push rod is rotated to match the outer diameter of the expansion ring to the pipe opening, then the expansion ring is pushed into the pipe opening, positioning the baffle at the pipe opening. The heat-shrink tape is then fitted onto the pipe opening. Finally, heating the heat-shrink tape seals the pipe opening by wrapping it between the pipe and the baffle. For later disassembly, only the heat-shrink tape needs to be removed, and the expansion ring can be taken out from inside the pipe. Furthermore, the expansion ring can be reused, making the operation convenient and effectively improving construction efficiency. Attached Figure Description
[0017] Figure 1 An exploded structural diagram of the natural gas pipeline end sealing structure provided in this embodiment of the utility model;
[0018] Figure 2 This is a schematic diagram of the connection structure between the expansion ring and the baffle provided in an embodiment of the present utility model;
[0019] Figure 3 This is a schematic diagram of the installation structure of the push rod provided in an embodiment of the present utility model.
[0020] Explanation of reference numerals in the attached figures:
[0021] 1. Pipe; 2. Expansion ring; 21. Limiting ring; 3. Baffle; 31. Arc plate; 311. Mounting plate; 4. Heat shrink tape; 5. Push rod; 51. Threaded sleeve. Detailed Implementation
[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0023] Please refer to the following: Figures 1 to 3 The natural gas pipeline end sealing structure provided by this utility model is described below. The natural gas pipeline end sealing structure includes an expansion ring 2, a push rod 5, a baffle 3, and heat-shrinkable tape 4. The expansion ring 2 has a notch for breaking it into two ends; the push rod 5 is threaded to both ends, with the external threads at both ends rotating in opposite directions; the baffle 3 is installed at one end of the expansion ring 2 and covers the end of the expansion ring 2; the heat-shrinkable tape 4 is wrapped between the baffle 3 and the pipeline 1 to seal the gap between them.
[0024] The natural gas pipeline end-sealing structure provided in this embodiment, compared with the prior art, features an expansion ring 2 with a notch that breaks the expansion ring 2 into two ends. A push rod 5 is threadedly connected to each end, and rotating the push rod 5 moves the two ends away from each other. A baffle 3 is also provided at one end of the expansion ring 2, with its outer diameter matching the inner diameter of the pipe opening. A heat-shrinkable tape 4 is also provided at the pipe opening of the pipe 1 and the baffle 3. In use, by rotating the push rod 5, the outer diameter of the expansion ring 2 is matched with the pipe opening of the pipe 1. Then, the expansion ring 2 is pushed into the pipe opening, positioning the baffle 3 at the pipe opening. The heat-shrinkable tape 4 is then fitted onto the pipe opening. Finally, heating the heat-shrinkable tape 4 wraps it between the pipe 1 and the baffle 3, achieving a seal at the pipe opening. For later disassembly, only the heat-shrinkable tape 4 needs to be removed, and the expansion ring 2 can be taken out from inside the pipe 1. Furthermore, the expansion ring 2 can be recycled, making it easy to operate and effectively improving construction efficiency.
[0025] Specifically, in this embodiment, the heat shrinkable tape 4 is a ring structure, which is directly fitted onto the opening of the pipe 1 and extends beyond the opening by a certain length. After the heat shrinkable tape 4 is heated, it wraps around the opening and the baffle 3 to achieve a seal at the opening and prevent soil from entering the inside of the pipe 1.
[0026] Preferably, in this embodiment, when the expansion ring 2 moves into the inside of the pipe opening of the pipe 1, the baffle 3 is flush with the end of the pipe opening, thereby facilitating the installation of the heat shrink tape 4.
[0027] In some embodiments, the baffle 3 may be adopted as follows: Figure 1 , Figure 2 The structure shown. See also... Figure 1 , Figure 2Multiple arc-shaped plates 31 are bent to the same side on the outer edge of the baffle 3, and these arc-shaped plates 31 are slidably disposed on the inner side of the expansion ring 2. The arc-shaped plates 31 are coaxially arranged with the baffle 3, and they slide in contact with the inner wall of the expansion ring 2. Therefore, when the baffle 3 is installed onto the expansion ring 2, the arc-shaped plates 31 provide a certain positioning function for the relative position of the baffle 3 and the expansion ring 2, facilitating the connection between the baffle 3 and the expansion ring 2.
[0028] Specifically, in this embodiment, the arc-shaped plate 31 is slidably disposed on the inner wall of the expansion ring 2 along the circumference of the expansion ring 2. This avoids affecting the push rod 5 in pushing the expansion ring 2 to expand outward.
[0029] In some embodiments, the aforementioned push rod 5 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 The push rod 5 is located between two adjacent arc-shaped plates 31. The push rod 5 is situated on the inner wall of the arc-shaped plate 31 and between the two arc-shaped plates 31, thus preventing interference between the arc-shaped plates 31 and the push rod 5. Simultaneously, the arrangement of multiple arc-shaped plates 31 avoids affecting the connection between the baffle 3 and the expansion ring 2.
[0030] In some embodiments, the aforementioned curved plate 31 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 A mounting plate 311 is bent outward on the side of the arc-shaped plate 31 away from the baffle 3. A groove for accommodating the mounting plate 311 is provided on the inner wall of the expansion ring 2. The mounting plate 311 is bent away from the axis of the arc-shaped plate 31 at its position on the arc-shaped plate 31. An annular groove for accommodating the mounting plate 311 is also recessed on the inner wall of the expansion ring 2. When the baffle 3 is installed on the expansion ring 2, multiple arc-shaped plates 31 slide into the interior of the expansion ring 2. When the baffle 3 abuts against the end of the expansion ring 2, the mounting plate 311 slides into the groove, thereby guiding the relative position of the baffle 3 and the expansion ring 2 and fixing the baffle 3 onto the expansion ring 2.
[0031] Specifically, in this embodiment, when the baffle 3 abuts against the end of the expansion ring 2, the connection between the arc plate 31 and the mounting plate 311 abuts against the side of the slot, thereby improving the stability of the relative position of the baffle 3 and the expansion ring 2.
[0032] Preferably, in this embodiment, the mounting plate 311 and the arc plate 31 are integrally bent and formed.
[0033] In some embodiments, the above-mentioned expansion ring 2 can be adopted as follows: Figure 1 , Figure 2 The structure shown. See also... Figure 1 , Figure 2The expansion ring 2, with the baffle 3 installed at one end, is bent outward and has a limiting ring 21 for abutting against the end face of the pipe 1. The limiting ring 21 has the same annular structure as the expansion ring 2, and protrudes from the outer ring of the expansion ring 2. When the expansion ring 2 is installed inside the pipe opening of the pipe 1, the limiting ring 21 can abut against the end of the pipe opening, which can position and guide the installation position of the expansion ring 2. By the limiting ring 21 abutting against the end of the pipe opening, the position of the expansion ring 2 can be positioned, preventing the expansion ring 2 from tilting after being installed inside the pipe 1, thus facilitating the subsequent installation of the heat shrink tape 4, and ensuring that the circumference of the heat shrink tape 4 can be stably attached to the circumference of the baffle 3.
[0034] In some embodiments, the aforementioned limiting ring 21 may be adopted as follows: Figure 1 , Figure 2 The structure shown. See also... Figure 1 , Figure 2 The limiting ring 21 has an annular groove recessed on its upper surface to accommodate the end of the pipe 1. The annular groove is also recessed on the side of the limiting ring 21 near the baffle 3. When the expansion ring 2 slides into the pipe opening, the end of the pipe opening slides into the annular groove. This provides some protection to the end of the pipe opening through the limiting ring 21, preventing damage to the pipe opening when it is hoisted and lowered into the trench. Thus, the limiting ring 21 serves both a positioning and limiting function, and also provides some protection to the pipe opening, ensuring safety during construction.
[0035] Specifically, in this embodiment, the outer diameter of the limiting ring 21 is larger than the outer diameter of the pipe opening on the pipe 1, so that when the expansion ring 2 is disassembled later, the expansion ring 2 can be pushed out from the inside of the pipe opening by pushing the side of the limiting ring 21.
[0036] In some embodiments, the above-mentioned expansion ring 2 can be adopted as follows: Figure 3 The structure shown. See also Figure 3 Two threaded sleeves 51, which are threadedly connected to the push rod 5, are fixedly installed on the expansion ring 2. The two threaded sleeves 51 are located at the two ends and are situated on the inner wall of the expansion ring 2. Because the threaded sleeves 51 are located on the inner wall of the expansion ring 2, after the push rod 5 is installed, it is positioned inside the expansion ring 2, preventing interference between the push rod 5 and the pipe 1 when the expansion ring 2 is pushed into the pipe 1.
[0037] Specifically, in this embodiment, before pushing the expansion ring 2 into the pipe opening of the pipe 1, the size of the expansion ring 2 can be adjusted by pushing the rod 5. After the adjustment is completed, the expansion ring 2 is pushed into the pipe 1.
[0038] In some embodiments, the threaded sleeve 51 may be adopted as follows: Figure 3 The structure shown. See also Figure 3The threaded sleeve 51 is provided with a limiting platform for abutting against the end of the expansion ring 2. The end of the expansion ring 2 is located in the middle of the threaded sleeve 51, and the limiting platform abuts against the end of the expansion ring 2. In this embodiment, the threaded sleeve 51 is fixedly installed on the end of the expansion ring 2 by welding. With the setting of the limiting platform, when the push rod 5 pushes the two ends to move in a relatively far direction, the limiting platform can play a supporting role, thereby improving the stability of the threaded sleeve 51 installed on the expansion ring 2.
[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A natural gas pipeline end sealing structure, characterized in that, include: The expansion ring (2) has a notch, which is used to break the expansion ring (2) into two ends; The push rod (5) has two ends threadedly connected to two end caps respectively, and the external threads at both ends of the push rod (5) have opposite directions of rotation; A baffle (3) is installed at one end of the expansion ring (2) and covers the end of the expansion ring (2); Heat shrinkable tape (4) is wrapped between the baffle (3) and the pipe (1) to seal the gap between the baffle (3) and the pipe (1).
2. The natural gas pipeline end sealing structure as described in claim 1, characterized in that, Multiple arc-shaped plates (31) are bent to the same side at the outer edge of the baffle (3), and the multiple arc-shaped plates (31) are slidably disposed on the inner side of the expansion ring (2).
3. The natural gas pipeline end sealing structure as described in claim 2, characterized in that, The push rod (5) is located between two adjacent arc-shaped plates (31).
4. The natural gas pipeline end sealing structure as described in claim 2, characterized in that, The arc plate (31) is bent outward on the side away from the baffle (3) and a mounting plate (311) is provided. The inner wall of the expansion ring (2) is provided with a slot for accommodating the mounting plate (311).
5. The natural gas pipeline end sealing structure as described in claim 1, characterized in that, The expansion ring (2) with the baffle (3) installed at one end is bent outward and has a limiting ring (21) for abutting against the end face of the pipe (1).
6. The natural gas pipeline end sealing structure as described in claim 5, characterized in that, The limiting ring (21) is recessed with an annular groove for accommodating the end of the pipe (1).
7. The natural gas pipeline end sealing structure as described in claim 5, characterized in that, Two threaded sleeves (51) that are threadedly connected to the push rod (5) are fixedly installed on the expansion ring (2). The two threaded sleeves (51) are located at the two ends respectively, and the threaded sleeves (51) are located on the inner wall of the expansion ring (2).
8. The natural gas pipeline end sealing structure as described in claim 7, characterized in that, The threaded sleeve (51) is provided with a limiting platform for abutting against the end of the expansion ring (2).