Liquefied natural gas (LNG) pipeline anti-leakage sealing structure

Abstract

The utility model relates to the related technical field of pipeline sealing connection, in particular to an LNG pipeline anti-leakage sealing structure which comprises a butt joint pipeline, barrel-shaped inserting grooves are formed in the two ends of the butt joint pipeline, elastic layers are arranged on the inner walls of the barrel-shaped inserting grooves, and the ends of two pipeline bodies are inserted into the two barrel-shaped inserting grooves respectively. Fixing assemblies are evenly distributed and installed on the circumference of the outer wall of the end of the butt joint pipeline to fix the pipeline body, the inner end of the cylindrical inserting groove is connected with a circular ring groove, an adding pipe is installed at the top of the butt joint pipeline, a filling sealing material is arranged in the circular ring groove through the adding pipe, and the end of the pipeline body extends into the circular ring groove. And the end of the pipeline body can be sealed by filling the sealing material, meanwhile, the connection stability and the connection strength of the pipeline body and the butt-joint pipeline can be enhanced, and the using effect is better.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline sealing connection, specifically an LNG pipeline anti-leakage sealing structure. Background Technology

[0002] Liquefied natural gas (LNG) pipelines are a crucial component of LNG production plants, and their standardized operation is essential for ensuring normal production. Because LNG pipelines operate at low temperatures, their connections are subjected to axial tensile forces and stress, making them prone to leaks. Since the flanges of LNG pipelines are encased in insulation material, leaks are difficult to detect. Leaking LNG diffuses along the insulation layer to other parts of the pipeline, eventually accumulating at a low point in the system. Over time, this accumulation point can become leaky, causing the accumulated LNG to vaporize and potentially reach explosive limits, posing a safety hazard. Therefore, the sealing of LNG pipeline connections is of paramount importance.

[0003] Existing sealing structures for LNG pipeline connections are mostly sleeve-type structures, which connect two LNG pipelines through sealing structures at both ends of the sleeve and seal the connection during connection. However, existing sealing structures are mostly compression-type sealing sleeves or gaskets, which have a short service life and are easily corroded and loosened. Therefore, those skilled in the art have proposed an LNG pipeline anti-leakage sealing structure to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a leak-proof sealing structure for LNG pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An LNG pipeline anti-leakage sealing structure includes a docking pipe with cylindrical slots at both ends. An elastic layer is provided on the inner wall of each cylindrical slot. One end of a pipe body is inserted into the cylindrical slot. Fixing components are evenly distributed around the outer circumference of the end of the docking pipe, with one end extending into the cylindrical slot. The fixing components are used to fix one end of the pipe body into the cylindrical slot. An annular groove is connected to the inner end of the cylindrical slot and is located inside the docking pipe. A filling pipe is installed at the top of the docking pipe, with its bottom end connected to the top of the annular groove. Sealing material is filled into the annular groove through the filling pipe.

[0007] As a further embodiment of this utility model: the outer wall of the connecting pipe is evenly provided with a plurality of threaded sleeves, the fixing component includes a threaded rod and a rectangular insert, one end of the threaded rod extends to the outside of the connecting pipe and is connected to a handle, the other end of the threaded rod extends into the cylindrical slot and is rotatably connected to one end of the rectangular insert, and the outer wall of the end of the pipe body is provided with a plurality of rectangular insertion holes, the position and number of the rectangular insertion holes corresponding to the position and number of the fixing component.

[0008] As a further embodiment of this utility model: a rotating sleeve is installed on the outer wall of one end of the rectangular insert, and a rotating column is connected to one end of the threaded rod, with the rotating column rotatably connected inside the rotating sleeve.

[0009] As a further embodiment of this utility model: one end of the pipe body extends into the annular groove and is provided with a plurality of through holes in a distributed manner.

[0010] As a further improvement of this utility model, the filling and sealing material is selected as a leak-stopping agent.

[0011] This utility model has the following advantages: The sealing structure achieves the connection and sealing of two pipe bodies through a connecting pipe. The end of the connecting pipe is provided with a cylindrical slot, and the inner end of the cylindrical slot is connected to a circular groove. When the end of the pipe body is inserted into the cylindrical slot, the end of the pipe body extends into the circular groove. By adding a filling sealing material into the circular groove through an adding pipe, the filling sealing material can seal the end of the pipe body, and at the same time enhance the connection stability and connection strength between the pipe body and the connecting pipe. While achieving the connection of two pipe bodies, it can ensure the sealing effect at the connection point, and has stronger practicality. Attached Figure Description

[0012] Figure 1 This is a side view of the overall internal structure of an embodiment of the present utility model.

[0013] Figure 2 This is a schematic diagram of the threaded rod in an embodiment of the present invention.

[0014] Figure 3 for Figure 1 Enlarged diagram of part A in the image.

[0015] In the diagram: 1. Pipe body; 2. Connecting pipe; 3. Cylindrical slot; 4. Fixing component; 5. Circular groove; 6. Filling sealant; 7. Adding tube; 8. Threaded sleeve; 9. Threaded rod; 10. Turning handle; 11. Rotating column; 12. Rotating sleeve; 13. Rectangular insert; 14. Elastic layer; 15. Through hole; 16. Rectangular insertion hole. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0017] Example 1: Please refer to Figures 1 to 3 An LNG pipeline anti-leakage sealing structure includes a docking pipe 2, with cylindrical slots 3 at both ends of the docking pipe 2. An elastic layer 14, made of corrosion-resistant rubber, is provided on the inner wall of the cylindrical slot 3. One end of a pipe body 1 is inserted into the cylindrical slot 3. Fixing components 4 are evenly distributed around the outer circumference of the end of the docking pipe 2, with one end extending into the cylindrical slot 3. The fixing components 4 are used to fix one end of the pipe body 1 into the cylindrical slot 3. An annular groove 5 is connected to the inner end of the cylindrical slot 3 and is located inside the docking pipe 2. An adding pipe 7 is installed at the top of the docking pipe 2, with its bottom end connected to the top of the annular groove 5. A filling sealing material 6 is provided in the annular groove 5 through the adding pipe 7.

[0018] Please see Figures 1 to 3 The outer wall of the docking pipe 2 is uniformly provided with a plurality of threaded sleeves 8. The fixing component 4 includes a threaded rod 9 and a rectangular insert 13. One end of the threaded rod 9 extends to the outside of the docking pipe 2 and is connected to a handle 10. The other end of the threaded rod 9 extends into the cylindrical slot 3 and is rotatably connected to one end of the rectangular insert 13. The outer wall of the end of the pipe body 1 is provided with a plurality of rectangular insertion holes 16. The position and number of the rectangular insertion holes 16 correspond to the position and number of the fixing component 4. In this embodiment, a rotating sleeve 12 is installed on the outer wall of one end of the rectangular insert 13. One end of the threaded rod 9 is connected to a rotating column 11. The rotating column 11 is rotatably connected in the rotating sleeve 12.

[0019] Example 2: See Figure 1 , Figure 3 Based on Embodiment 1, one end of the pipe body 1 extends into the annular groove 5 and is provided with a plurality of through holes 15. When a filling sealant 6 is added, the filling sealant 6 can enter the through holes 15. After the filling sealant 6 solidifies, it can enhance the fixing effect on the end of the pipe body 1.

[0020] Preferably, the filling and sealing material 6 is selected as a leak-stopping agent.

[0021] In use, after calibrating the position of the end of the pipe body 1, insert it into the cylindrical slot 3. The elastic layer 14 of the inner wall of the cylindrical slot 3 abuts against the outer and inner walls of the end of the pipe body 1. The end of the pipe body 1 is inserted into the annular groove 5. Turn the handle 10 to drive the threaded rod 9 to rotate and move towards the cylindrical slot 3 until the rectangular insert 13 is inserted into the rectangular insertion hole 16, thereby fixing the pipe body 1. Then, make the top of the adding tube 7 face directly upward, and add the filling sealant 6 into the annular groove 5 through the adding tube 7. The filling sealant 6 passes through the through hole 15 and fills the entire annular groove 5. After the filling sealant 6 solidifies, it can connect and fix the end of the pipe body 1 and achieve a seal.

Claims

1. A leak-proof sealing structure for LNG pipelines, comprising connecting pipes, characterized in that, Both ends of the connecting pipe are provided with cylindrical slots, and the inner wall of the cylindrical slots is provided with an elastic layer. One end of the pipe body is inserted into the cylindrical slot. Fixing components are evenly distributed around the outer circumference of the end of the connecting pipe. One end of the fixing component extends into the cylindrical slot. The fixing component is used to fix one end of the pipe body into the cylindrical slot. The inner end of the cylindrical slot is connected to an annular groove, which is located inside the connecting pipe. An adding tube is installed at the top of the connecting pipe. The bottom end of the adding tube is connected to the top of the annular groove. The annular groove is filled with sealing material through the adding tube.

2. The LNG pipeline anti-leakage sealing structure according to claim 1, characterized in that, The outer wall of the connecting pipe is evenly provided with a number of threaded sleeves. The fixing component includes a threaded rod and a rectangular insert. One end of the threaded rod extends to the outside of the connecting pipe and is connected to a handle. The other end of the threaded rod extends into the cylindrical slot and is rotatably connected to one end of the rectangular insert. The outer wall of the end of the pipe body is provided with a number of rectangular insertion holes. The position and number of the rectangular insertion holes correspond to the position and number of the fixing component.

3. The LNG pipeline anti-leakage sealing structure according to claim 2, characterized in that, A rotating sleeve is installed on the outer wall of one end of the rectangular insert, and a rotating column is connected to one end of the threaded rod. The rotating column is rotatably connected inside the rotating sleeve.

4. The LNG pipeline anti-leakage sealing structure according to claim 1, characterized in that, One end of the pipe body extends into the annular groove and is provided with several through holes in a distributed manner.

5. The LNG pipeline anti-leakage sealing structure according to claim 4, characterized in that, The filling and sealing material selected is a leak-stopping agent.

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