Maintenance device for natural gas conveying pipeline

Abstract

The utility model discloses a maintenance device for a natural gas conveying pipeline, and relates to the technical field of natural gas pipeline maintenance. The device comprises a maintenance frame, the top of the maintenance frame is connected with a stud in a threaded penetrating mode, the upper end of the stud is fixedly connected with a first rotating disc in a sleeved mode, the lower end of the stud is rotationally connected with a connecting base, and guide rods are symmetrically and fixedly arranged at the top of the connecting base. According to the natural gas transportation pipeline maintenance device, the two clamping jaws are arranged on the inner walls of the two pipeline clamping plates, the pressing base at the bottom of the connecting base is detached and replaced, the natural gas transportation pipeline maintenance device can be suitable for maintenance of natural gas transportation pipelines with different pipe diameters, the arc-shaped iron plate is fixed to the bottom of the pressing base in a magnetic adsorption mode, and the maintenance efficiency is improved. After the carbon fiber cloth is adhered and fixed on the pipeline, a worker can conveniently separate the pressing seat from the arc-shaped iron plate without damaging the adhered part, and meanwhile, the edge of the arc-shaped iron plate is welded on the surface of the pipeline, so that the maintenance quality of the leakage part of the pipeline can be further improved.

Description

Technical Field

[0001] This utility model belongs to the field of natural gas pipeline maintenance technology, and in particular relates to a maintenance device for natural gas transmission pipelines. Background Technology

[0002] Natural gas is generally transported via pipelines, which offer advantages such as high safety, low cost, and large transport capacity. However, pipelines are buried underground for extended periods, and due to water damage and environmental factors, their outer walls corrode. Combined with the internal pressure, this can lead to leaks during operation, wasting significant energy. Therefore, maintenance of long-distance natural gas pipelines is essential. A search revealed a patent application (application number 202121411777.9) disclosing a maintenance device for long-distance natural gas pipelines, comprising a main component, a pressing component, a curing component, a fixing component, and a guiding component. The main component includes a pipeline, a first plate, a second plate, and a first arc-shaped plate. The first plate is positioned above the pipeline, and two second plates are symmetrically welded to its lower surface. A first arc-shaped plate is integrally formed on the adjacent side of each of the two second plates, with the inner wall of the first arc-shaped plate fitting against the outer wall of the pipeline.

[0003] However, during actual use, the applicant found that the second arc-shaped plate used to compress the carbon fiber cloth could not be replaced, making the device unsuitable for the maintenance of natural gas transmission pipelines of different diameters. In view of this, we propose a maintenance device for natural gas transmission pipelines. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a maintenance device for natural gas transmission pipelines, comprising a maintenance frame. A stud is threaded through the top of the maintenance frame. A first turntable is fixedly fitted onto the upper end of the stud, and a connecting seat is rotatably connected to the lower end of the stud. Guide rods are symmetrically fixed to the top of the connecting seat, with their upper ends movably penetrating the top of the maintenance frame. A clamping seat is bolted to the bottom of the connecting seat. An arc-shaped iron plate is fixed to the bottom of the clamping seat, and the arc-shaped iron plate is magnetically adsorbed onto the clamping seat. Carbon fiber cloth is adhered to the bottom of the arc-shaped iron plate, and the lower surface of the carbon fiber cloth is coated with epoxy adhesive. Pipe clamping plates are symmetrically slidably connected to the top of the inner side of the maintenance frame. The lower part of the pipe clamping plate... The side wall is fixedly equipped with claws, and there are two claws arranged vertically on the inner wall of the pipe clamping plate. The maintenance frame on both sides of the stud is rotatably connected to a double-ended screw via bearings. The threads at both ends of the double-ended screw have opposite directions, and the threads at both ends of the double-ended screw pass through the upper part of the two pipe clamping plates respectively. A drive box is fixedly connected to the outer wall of one side of the maintenance frame. One end of the two double-ended screws extends into the drive box and is fitted with a driven gear. A rotating shaft is rotatably connected to the drive box between the two double-ended screws via bearings. A driving gear is fitted with a rotating shaft. Both driven gears are meshed with the driving gear. One end of the rotating shaft extends to the outside of the drive box and is fitted with a second turntable.

[0006] Preferably, a magnet block is embedded and fixed on the arc surface at the bottom of the clamping seat.

[0007] Preferably, the arc-shaped iron plate is fixed to the bottom of the clamping seat by magnetic adsorption, and the carbon fiber cloth is fixed to the lower surface of the arc-shaped iron plate by epoxy adhesive.

[0008] Preferably, a guide groove is provided at the top of the inner side of the maintenance frame, and a guide slider is provided at the upper part of the pipe clamping plate, and the guide slider slides along the guide groove.

[0009] Preferably, the bottom of the connecting seat is provided with a T-shaped connecting groove, and the upper part of the pressing seat is provided with a T-shaped connecting block, and the T-shaped connecting block is connected to the T-shaped connecting groove.

[0010] Preferably, one end of the bolt is screwed into a threaded hole on one side of the connecting seat and inserted into a limiting insertion hole on the side wall of the T-shaped connecting block.

[0011] This utility model has the following beneficial effects:

[0012] This utility model discloses a maintenance device for natural gas transmission pipelines. By setting two claws on the inner walls of two pipe clamping plates, the device can be clamped and fixed to natural gas transportation pipelines of different diameters. By disassembling and replacing the pressure seat at the bottom of the connecting seat, carbon fiber cloth can be tightly pressed onto natural gas transportation pipelines of different diameters, thus making the device suitable for the maintenance of natural gas transportation pipelines of different diameters. By fixing the arc-shaped iron plate to the bottom of the pressure seat by magnetic adsorption, it is easy for personnel to separate the pressure seat from the arc-shaped iron plate after the carbon fiber cloth is adhered and fixed to the pipeline without damaging the adhesion. At the same time, by welding the edge of the arc-shaped iron plate to the pipeline surface, the repair quality of pipeline leaks can be further improved. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a top view of a maintenance device for a natural gas pipeline according to the present invention.

[0015] Figure 2 This is a bottom view of the structure of a maintenance device for a natural gas pipeline according to the present invention;

[0016] Figure 3 This is a schematic diagram of the internal structure of the drive box in a maintenance device for natural gas transmission pipelines according to this utility model;

[0017] Figure 4 This utility model relates to a maintenance device for natural gas transmission pipelines. Figure 2 Enlarged view of the structure at point A in the middle.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Maintenance frame; 2. Stud; 21. First turntable; 3. Double-ended screw; 4. Connecting seat; 41. Guide rod; 42. T-shaped connecting groove; 43. Bolt; 5. Clamping seat; 51. T-shaped connecting block; 6. Pipe clamping plate; 61. Claw; 7. Drive box; 71. Rotating shaft; 711. Second turntable; 72. Drive gear; 73. Driven gear; 8. Arc-shaped iron plate; 9. Carbon fiber cloth. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 As shown, this utility model provides a technical solution:

[0022] A maintenance device for a natural gas pipeline includes a maintenance frame 1. A stud 2 is threaded through the top of the maintenance frame 1. A first turntable 21 is fixedly fitted onto the upper end of the stud 2, and a connecting seat 4 is rotatably connected to the lower end of the stud 2. Guide rods 41 are symmetrically fixed to the top of the connecting seat 4, with the upper end of the guide rods 41 movably penetrating the top of the maintenance frame 1. A clamping seat 5 is locked to the bottom of the connecting seat 4 by bolts 43. A T-shaped connecting groove 42 is provided at the bottom of the connecting seat 4. A T-shaped connecting block 51 is provided on the upper part of the clamping seat 5, and the T-shaped connecting block 51 mates with the T-shaped connecting groove 42. One end of the bolt 43 is threaded into a threaded hole on one side of the connecting seat 4 and inserted into a limiting insertion hole on the side wall of the T-shaped connecting block 51. An arc-shaped iron plate 8 is fixed to the bottom of the clamping seat 5. A carbon fiber cloth 9 is adhered and fixed to the bottom of the arc-shaped iron plate 8. The lower surface of the carbon fiber cloth 9 is coated with epoxy adhesive. A pipe clamping plate 6 is symmetrically slidably connected to the top of the inner side of the maintenance frame 1. A guide groove is opened on the top of the inner side of the maintenance frame 1. A guide slider is provided on the upper part of the pipe clamping plate 6, and the guide slider slides along the guide groove. A claw 61 is fixedly provided on the inner wall of the lower part of the pipe clamping plate 6. There are two claws 61 on the inner wall of the pipe clamping plate 6, one above the other. By providing two claws 61 on the inner walls of the two pipe clamping plates 6, the device can be clamped and fixed on natural gas transportation pipelines of different diameters. By disassembling and replacing the clamping seat 5 at the bottom of the connecting seat 4, the carbon fiber can be... The cloth 9 is tightly pressed against natural gas transportation pipelines of different diameters, thus enabling the device to be used for the maintenance of natural gas transportation pipelines of different diameters. Double-ended screws 3 are rotatably connected to the maintenance frame 1 on both sides of the stud 2 via bearings. The threads at both ends of the double-ended screws 3 have opposite directions, and the threads at both ends of the double-ended screws 3 respectively penetrate the upper part of the two pipe clamping plates 6. A drive box 7 is fixedly connected to the outer wall of one side of the maintenance frame 1. One end of each of the two double-ended screws 3 extends into the drive box 7 and is fitted with a driven gear 73. A rotating shaft 71 is rotatably connected to the drive box 7 between the two double-ended screws 3 via bearings. A driving gear 72 is fitted onto the rotating shaft 71, and both driven gears 73 are meshed with the driving gear 72. One end extends to the outside of the drive box 7 and is fitted with a second turntable 711. When maintaining a leak in a natural gas pipeline, a suitable clamping seat 5 can be selected according to the pipe diameter. The T-shaped connecting block 51 on the upper part of the clamping seat 5 is slid into the T-shaped connecting groove 42. Then, the bolt 43 is tightened to limit and fix the T-shaped connecting block 51 in the guide rod 41, thus completing the fixation of the clamping seat 5. Next, the carbon fiber cloth 9 is fixed to the bottom of the arc-shaped iron plate 8 using epoxy adhesive. Then, the surface of the pipeline to be repaired is derusted and coated with resin to fill the surface of the pipeline. The lower surface of the carbon fiber cloth 9 is coated with epoxy adhesive, and the maintenance frame 1 is put on the pipeline. Then, the position of the clamping seat 5 is adjusted so that the carbon fiber cloth 9 is facing the position to be repaired.Next, manually rotate the second turntable 711 clockwise to rotate the shaft 71. The rotation of the shaft 71 drives the drive gear 72, which in turn drives the two driven gears 73 along with the two double-ended screws 3. The rotation of the two double-ended screws 3 causes the two pipe clamping plates 6 to move closer together, making the claws 61 abut against the outer wall of the pipe. Finally, manually rotate the first turntable 21 clockwise to rotate the stud 2. The rotation of the stud 2 causes the connecting seat 4 along with the clamping seat 5 to move downwards. The clamping seat 5 and the arc-shaped iron plate 8 then press and fix the carbon fiber cloth 9 to the location on the pipe to be repaired, allowing for pipe leak repair without interrupting airflow.

[0023] The curved iron plate 8 is magnetically adsorbed onto the clamping seat 5. A magnet is embedded in the curved surface of the bottom of the clamping seat 5. The curved iron plate 8 is fixed to the bottom of the clamping seat 5 by the magnet. The carbon fiber cloth 9 is fixed to the lower surface of the curved iron plate 8 with epoxy adhesive. The magnetic attraction force of the clamping seat 5 to the curved iron plate 8 is much less than the adhesive attraction force of the carbon fiber cloth 9 to the curved iron plate 8. By fixing the curved iron plate 8 to the bottom of the clamping seat 5 by magnetic adsorption, it is easier for personnel to remove the clamping plate after the carbon fiber cloth 9 is adhered to the pipe. The clamping seat 5 separates from the arc-shaped iron plate 8 without damaging the adhesion. At the same time, by welding the edge of the arc-shaped iron plate 8 to the pipe surface, the repair quality of the pipe leak can be further improved. After the carbon fiber cloth 9 is glued and fixed to the pipe surface, the clamping seat 5 can be moved upward by rotating the stud 2 in the opposite direction, which can separate the clamping seat 5 from the arc-shaped iron plate 8. After the device is removed from the pipe, the edge of the arc-shaped iron plate 8 can be welded and fixed to the pipe surface, which further improves the repair quality of the pipe leak.

[0024] Working Principle: When maintaining a leak in a natural gas pipeline, select a suitable clamping seat 5 according to the pipeline diameter. Slide the T-shaped connecting block 51 on the upper part of the clamping seat 5 into the T-shaped connecting groove 42. Then tighten the bolt 43 to fix the T-shaped connecting block 51 in the guide rod 41, thus fixing the clamping seat 5. Next, use epoxy adhesive to fix the carbon fiber cloth 9 to the bottom of the arc-shaped iron plate 8. Then, remove rust from the surface of the pipeline to be repaired and apply resin to fill the surface. Apply epoxy adhesive to the lower surface of the carbon fiber cloth 9 and place the maintenance frame 1 on the pipeline. Then, adjust the position of the clamping seat 5 so that the carbon fiber cloth 9 is facing the repair location. Then, manually rotate the second turntable 711 clockwise to drive the rotating shaft 71 to rotate. The rotation of the rotating shaft 71 drives the drive gear 72 to rotate, and the rotation of the drive gear 72 simultaneously... The two driven gears 73, along with the two double-ended screws 3, rotate together. At this time, the rotation of the two double-ended screws 3 can drive the two pipe clamping plates 6 to move closer synchronously, and make the claws 61 abut against the outer wall of the pipe. Finally, manually rotate the first turntable 21 clockwise to drive the stud 2 to rotate. The rotation of the stud 2 can drive the connecting seat 4 and the clamping seat 5 to move downward together. The carbon fiber cloth 9 is pressed and fixed to the position of the pipe to be repaired by the clamping seat 5 and the arc-shaped iron plate 8. The pipe leak can be repaired without stopping the gas. After the carbon fiber cloth 9 is glued and fixed to the pipe surface, the clamping seat 5 is moved upward by rotating the stud 2 in the opposite direction, which can separate the clamping seat 5 from the arc-shaped iron plate 8. After the device is removed from the pipe, the edge of the arc-shaped iron plate 8 can be welded and fixed to the pipe surface by welding, which further improves the repair quality of the pipe leak.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. A maintenance device for a natural gas pipeline, characterized by: The utility model provides a maintenance frame (1), the top of maintenance frame (1) is screwed through the connection with the stud (2), the upper end of stud (2) is sleeved and is fixed with first rotating disc (21), and the lower end of stud (2) is rotatably connected with connecting seat (4), the top of connecting seat (4) is fixed with guide rod (41) in a symmetrical manner, and the upper end of guide rod (41) is movably penetrated through the top of maintenance frame (1), the bottom of connecting seat (4) is fixed with the pressing seat (5) through bolt (43), the bottom of pressing seat (5) is fixed with arc iron sheet (8), arc iron sheet (8) is magnetically adsorbed on pressing seat (5), the bottom of arc iron sheet (8) is fixed with carbon fiber cloth (9) with sticking, the lower surface of carbon fiber cloth (9) is coated with epoxy adhesive, the top of the inner side of maintenance frame (1) is slidably connected with pipeline clamping plate (6), the inner side wall on the lower part of pipeline clamping plate (6) is fixed with clamping jaw (61), and two clamping jaws (61) are arranged on the inner wall of pipeline clamping plate (6), the maintenance frame (1) on the front and back sides of stud (2) is rotatably connected with double head screw rod (3) through bearing, the thread rotation direction of the two ends of double head screw rod (3) is opposite, and the two ends of double head screw rod (3) are screwed through the upper part of the two pipeline clamping plates (6) respectively, the outer wall on the side of maintenance frame (1) is fixedly connected with drive box (7), one end of the two double head screw rods (3) extends to drive box (7) and is sleeved and fixed with driven gear (73), drive box (7) between the two double head screw rods (3) is rotatably connected with rotating shaft (71) through bearing, the rotating shaft (71) is sleeved and fixed with driving gear (72), the two driven gears (73) are rotatably connected with the driving gear (72), one end of rotating shaft (71) extends to the outside of drive box (7) and is sleeved and fixed with second rotating disc (711).

2. A natural gas pipeline maintenance device according to claim 1, wherein The arc surface of the bottom of the pressing seat (5) is embedded with a magnet block.

3. A natural gas pipeline maintenance device according to claim 2, wherein The arc iron sheet (8) is fixed on the bottom of the pressing seat (5) by the magnet block, and the carbon fiber cloth (9) is fixed on the lower surface of the arc iron sheet (8) by the epoxy adhesive.

4. The natural gas pipeline maintenance device of claim 1, wherein, A guide sliding groove is formed in the top of the inner side of the maintenance frame (1), and a guide sliding block is arranged on the upper part of the pipeline clamping plate (6), and the guide sliding block slides along the guide sliding groove.

5. The natural gas pipeline maintenance device of claim 1, wherein, A T-shaped connecting groove (42) is formed in the bottom of the connecting seat (4), and a T-shaped connecting block (51) is arranged on the upper part of the pressing seat (5), and the T-shaped connecting block (51) is connected with the T-shaped connecting groove (42).

6. A natural gas pipeline maintenance device according to claim 5, wherein One end of the bolt (43) is screwed into the threaded hole on one side of the connecting seat (4) and inserted into the limiting insertion hole formed in the side wall of the T-shaped connecting block (51).

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