Temporary fixing method and device for inner pipe and outer pipe of buried steel jacket steel pipeline

Abstract

The invention relates to pipeline engineering, in particular to a temporary fixing method and device for an inner pipe and an outer pipe of a buried steel bushing steel pipeline, the temporary fixing device comprises a steel bushing, a steel pipe and a connecting rod, the steel pipe is inserted into the steel bushing, the connecting rod is inserted between the steel bushing and the steel pipe, and one end of the connecting rod is fixedly connected with a rotating wheel; the adjusting assembly is connected with the connecting rod, the fixing assembly is used for supporting and fixing the steel sleeve and the steel pipe, and the fixing assembly is connected with the adjusting assembly. Through cooperation of the adjusting assemblies and the fixing assemblies, steel jackets and steel pipes with different pipe diameters can be supported and fixed, the multiple fixing assemblies can be synchronously unfolded, the relative distance between the steel jackets and the steel pipes in all directions is ensured, the steel jackets and the steel pipes can be conveniently disassembled and recycled after being installed, and the final welding and sliding functions of the pipeline are not affected; corrosion-resistant layers, heat preservation layers and ports of the steel sleeve and the steel pipe are not damaged, and the threshold requirement for operators is low.

Description

Technical Field

[0001] This invention relates to pipeline engineering, and more particularly to a method and apparatus for temporary fixing of the inner and outer pipes of buried steel-jacketed pipelines. Background Technology

[0002] Pipeline engineering is an engineering project that constructs pipeline systems and related facilities for transporting oil, natural gas, and solid slurries, encompassing three parts: pipeline route engineering, station and storage engineering, and ancillary engineering.

[0003] Buried steel-jacketed pipes consist of a steel pipe, an insulation layer, and an outer steel sheath from the inside out. Due to their unique structure, temporary fixing of the inner and outer pipes is necessary before installation to ensure their relative positions and protect the insulation layer. Current technology uses steel supports to fix the inner and outer pipes at both ends via welding. This method requires highly skilled operators, results in material waste and low efficiency due to the one-time fixing and dismantling process, and the welding of temporary fixing devices may adversely affect the inner and outer pipes—the impact resistance of the pipe material in the heat-affected zone deteriorates, the pipe ends deform due to heat affecting the roundness of the inner and outer pipes, and the anti-corrosion layer is damaged, all of which affect the normal installation and use of the pipes. Therefore, designing a temporary fixing method and device for the inner and outer pipes of buried steel-jacketed pipes is a problem we currently need to solve. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of temporary fixing of the inner and outer pipes before installation of buried steel-jacketed steel pipelines.

[0005] The technical solution of the present invention: a temporary fixing device for the inner and outer pipes of buried steel-cased steel pipes, comprising: a steel casing, a steel pipe and a connecting rod, wherein the steel pipe is inserted into the inside of the steel casing, a connecting rod is inserted between the steel casing and the steel pipe, and a rotating wheel is fixedly connected to one end of the connecting rod; An adjusting assembly, which is used to adapt to steel sleeves and steel pipes of different diameters, is connected to the connecting rod; A fixing component is provided for supporting and fixing the steel sleeve and the steel pipe, and the fixing component is connected to the adjusting component.

[0006] Optionally, the adjustment assembly includes two adjustment components, each of which includes multiple arc-shaped parts, with an arc-shaped sleeve inserted between every two adjacent arc-shaped parts.

[0007] Optionally, a limiting block is inserted inside the arc-shaped component and the arc-shaped sleeve, and a screw is rotatably connected to one side of the limiting block. The screw is threaded into the inside of the arc-shaped component.

[0008] Optionally, a guide rod is rotatably connected inside the multiple arc-shaped parts of one of the adjustment components, and the guide rod is inserted into the multiple arc-shaped parts of another adjustment component.

[0009] Optionally, one of the guide rods has threads on its outer wall, and the connecting rod is fixedly connected to the end of the threaded guide rod. The threads are connected to the inside of the arc-shaped part near the connecting rod.

[0010] Optionally, an elastic rope is inserted inside the arc-shaped sleeve and the limiting block, and a limiting bead is fixedly connected to both ends of the elastic rope. The limiting bead is inserted inside the arc-shaped part and the arc-shaped sleeve, and the limiting bead abuts against the outer wall of the limiting block.

[0011] Optionally, the fixing assembly includes a hinge that is fixedly installed on the outer wall of the arc-shaped part of the two adjusting components. The hinge is sleeved on the outer wall of the guide rod, and a first connecting rod and a second connecting rod are hinged inside the hinge.

[0012] Optionally, the end of the first connecting rod away from the hinge is rotatably connected to a first connecting member, the outer wall of the first connecting member is fixedly connected to a first support plate, and the side of the first support plate away from the first connecting member is fixedly connected to a first soft pad.

[0013] Optionally, the end of the second link away from the hinge is rotatably connected to a second connector, the outer wall of the second connector is fixedly connected to a second support plate, and the side of the second support plate away from the second connector is fixedly connected to a second soft pad.

[0014] The temporary fixing method for the inner and outer pipes of buried steel-jacketed pipes includes the following steps: S1. Place the retracted adjustment and fixing components between the steel sleeve and the steel pipe, and use the connecting rod and the rotating wheel to push the adjustment and fixing components to a distance of 0.5-1 meter from the end of the steel sleeve and the steel pipe. S2. Rotate the wheel so that the wheel drives the adjustment component to work through the connecting rod, so that the adjustment component controls the fixing component to be fixed between the steel sleeve and the steel pipe; S3. Weld the fixed steel pipe, and remove the adjusting and fixing components from the inside of the steel sleeve and steel pipe after welding.

[0015] In summary, this application includes at least one of the following beneficial technical effects: This invention improves the applicability of temporary fixing devices by setting an adjustment component to adapt to steel sleeves and steel pipes of different diameters. It makes it convenient for workers to fit the adjustment component inside steel pipes of different diameters. When not in use, the adjustment component automatically retracts to reduce the footprint and makes it easy for workers to carry. By setting up fixing components, the relative movement of the steel sleeve and steel pipe in the axial and radial directions is supported and fixed, preventing the steel pipe from squeezing the insulation layer downward under the action of gravity. Furthermore, by coordinating the adjusting and fixing components, steel sleeves and pipes of different diameters can be supported and fixed. Multiple fixing components can be deployed simultaneously, ensuring that each fixing component deploys at the same speed and size, thus guaranteeing the relative distance between the steel sleeve and pipe in all directions. This improves the efficiency of workers in fixing the steel sleeve and pipe, and facilitates disassembly and reuse after installation. It does not affect the final welding and sliding function of the pipeline, nor does it damage the anti-corrosion layer, insulation layer, or ports of the steel sleeve and pipe. It also has low requirements for the skill level of operators. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the deployed state of the fixing device proposed in this invention; Figure 2 This is a cross-sectional view of the structure of the fixing device and the steel sleeve and steel pipe proposed in this invention. Figure 3 The present invention proposes Figure 2 Enlarged view of the A-section structure; Figure 4 This is a schematic diagram of the retracted state structure of the fixing device proposed in this invention.

[0017] Figure label: 1. Steel sleeve; 2. Steel pipe; 3. Connecting rod; 4. Rotary wheel; 5. Guide rod; 6. Thread; 7. Arc-shaped part; 8. Arc-shaped sleeve; 9. Limiting block; 10. Screw; 11. Limiting bead; 12. Elastic rope; 13. Hinge; 14. First connecting rod; 15. Second connecting rod; 16. First connecting piece; 17. First support plate; 18. First soft pad; 19. Second connecting piece; 20. Second support plate; 21. Second soft pad. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1, as Figures 1 to 2 As shown, the temporary fixing device for the inner and outer pipes of the buried steel-cased steel pipeline includes: a steel sleeve 1, a steel pipe 2, and a connecting rod 3. The steel pipe 2 is inserted into the inside of the steel sleeve 1, and the connecting rod 3 is inserted between the steel sleeve 1 and the steel pipe 2. One end of the connecting rod 3 is fixedly connected to a rotating wheel 4; an adjusting component, which is used to adapt to steel sleeves 1 and steel pipes 2 of different diameters, and is connected to the connecting rod 3; and a fixing component, which is used to support and fix the steel sleeve 1 and steel pipe 2, and is connected to the adjusting component. Multiple fixing components are provided, and the multiple fixing components are arranged in a ring-shaped manner at equal intervals on the outer wall of the adjusting component. In this embodiment, the connecting rod 3 is used to assist the operator in placing the adjustment component and the fixing component into a suitable position between the steel sleeve 1 and the steel pipe 2, and the rotating wheel 4 is used to assist the operator in controlling the operation of the adjustment component and the fixing component to support and fix the steel sleeve 1 and the steel pipe 2. Specifically, the worker can hold the connecting rod 3 and use it to align the adjusting and fixing components with the insulation layer between the steel sleeve 1 and the steel pipe 2, and insert them until the adjusting and fixing components are inserted into the appropriate position of the insulation layer between the steel sleeve 1 and the steel pipe 2. Then, the worker can rotate the rotating wheel 4, which will cause the connecting rod 3 to rotate. This will cause the connecting rod 3 to deform and unfold through the adjusting component, supporting and fixing the steel sleeve 1 and the steel pipe 2 to ensure the relative position between the inner and outer pipes and protect the insulation layer.

[0024] Example 2, as Figures 3 to 4As shown, the adjustment assembly includes two adjustment components, each including multiple arc-shaped parts 7. An arc-shaped sleeve 8 is inserted between every two adjacent arc-shaped parts 7. A limiting block 9 is inserted inside the arc-shaped parts 7 and the arc-shaped sleeve 8. A screw 10 is rotatably connected to one side of the limiting block 9. The screw 10 is threadedly connected to the inside of the arc-shaped parts 7. A guide rod 5 is rotatably connected inside the multiple arc-shaped parts 7 of one of the adjustment components. The guide rod 5 is inserted inside the multiple arc-shaped parts 7 of the other adjustment component. A thread 6 is provided on the outer wall of one of the guide rods 5. A connecting rod 3 is fixedly connected to the end of the guide rod 5 with the thread 6. The thread 6 is threadedly connected to the inside of the arc-shaped part 7 near the connecting rod 3. An elastic rope 12 is inserted inside the arc-shaped sleeve 8 and the limiting block 9. A limiting bead 11 is fixedly connected to both ends of the elastic rope 12. The limiting bead 11 is inserted inside the arc-shaped parts 7 and the arc-shaped sleeve 8. The limiting bead 11 abuts against the outer wall of the limiting block 9. In this embodiment, the adjustment component is used to adapt to steel sleeves 1 and steel pipes 2 with different diameters, so as to improve the applicability of the temporary fixing device; Specifically, when the adjusting component needs to be fitted onto the outer wall of the steel pipe 2, the operator can pull the arc-shaped parts 7 to separate them, thus exposing the arc-shaped sleeves 8 between the arc-shaped parts 7. The arc-shaped parts 7, in conjunction with the arc-shaped sleeves 8, expand the overall profile to accommodate steel pipes 2 of different sizes, making it convenient for the operator to fit the adjusting component inside steel pipes 2 of different diameters. Simultaneously, when the multiple arc-shaped parts 7 separate, adjacent arc-shaped parts 7 will pull the elastic rope 12 through the limiting blocks 9 and limiting beads 11, extending and storing force. When the adjusting component is removed from the outer wall of the steel pipe 2, the elastic rope 12 will return to its original position, pulling adjacent arc-shaped parts 7 closer together through the limiting beads 11 and limiting blocks 9, allowing the adjusting component to automatically retract when not in use, reducing its footprint and making it easier for the operator to carry. It should be noted that when the steel sleeve 1 and the steel pipe... When the location of component 2 makes it inconvenient to directly insert the adjusting component and the fixing component, the operator can rotate the screw 10 to separate the screw 10 from the inside of the arc-shaped component 7 through the thread. This causes the screw 10 to drive the limiting block 9 to disengage from the inside of the arc-shaped component 7 and the arc-shaped sleeve 8, allowing the limiting block 9 to stop being fitted onto the outer wall of the elastic rope 12. At this point, the arc-shaped component 7 and the arc-shaped sleeve 8 lose their limiting position, and the limiting block 9 stops blocking the limiting bead 11. The operator can then unfold the adjusting component from its ring state into a long strip state. The operator can then wrap the adjusting component around the outer wall of the steel pipe 2 and re-fix the limiting block 9 and the screw 10, allowing the adjusting component to reassemble into a ring state. This allows the adjusting component to change between various forms to adapt to different locations of the steel sleeve 1 and the steel pipe 2 when supporting and fixing them.

[0025] Example 3, as Figure 3As shown, the fixing assembly includes a hinge 13 fixedly installed on the outer wall of the two adjusting arc-shaped parts 7. The hinge 13 is sleeved on the outer wall of the guide rod 5. A first connecting rod 14 and a second connecting rod 15 are hinged inside the hinge 13. The end of the first connecting rod 14 away from the hinge 13 is rotatably connected to a first connecting member 16. A first support plate 17 is fixedly connected to the outer wall of the first connecting member 16. A first soft pad 18 is fixedly connected to the side of the first support plate 17 away from the first connecting member 16. The end of the second connecting rod 15 away from the hinge 13 is rotatably connected to a second connecting member 19. The connection 16 and the second connection 19 can strengthen the first support plate 17 and the second support plate 20 while being rotatably connected to the corresponding first connecting rod 14 and the second connecting rod 15, ensuring the overall strength of the first support plate 17 and the second support plate 20. The second support plate 20 is fixedly connected to the outer wall of the second connection 19, and the second soft pad 21 is fixedly connected to the side of the second support plate 20 away from the second connection 19. The first soft pad 18 and the second soft pad 21 are provided to prevent the fixing components from damaging the surface of the steel sleeve 1 and the steel pipe 2. In this embodiment, the fixing component is used to support and fix the steel sleeve 1 and the steel pipe 2, and works with the adjusting component to support and fix the steel sleeve 1 and the steel pipe 2 of different diameters. The adjusting component is also used to simultaneously unfold to support and fix the steel sleeve 1 and the steel pipe 2. Specifically, when workers need to fix the steel sleeve 1 and the steel pipe 2, they can rotate the rotating wheel 4, causing the rotating wheel 4 to drive the connecting rod 3 to rotate. This, in turn, causes the connecting rod 3 to drive the connected guide rod 5, which has a threaded 6, to rotate. The threaded 6 then drives the connected arc-shaped component 7 to rotate, causing the arc-shaped component 7 to move the entire adjusting component closer to the other adjusting component, thus shortening the distance between the two adjusting components. During this process, the arc-shaped components 7 of the two adjusting components will cause the corresponding hinges 13 to move closer together. The hinges 13 will then press the first connecting rod 14 and the second connecting rod 15 to rotate, pushing the corresponding first connecting piece 16 and the second connecting piece 19 away from each other. This, in turn, causes the first connecting piece 16 and the second connecting piece 19 to move the corresponding first support plate 17 and the second support plate 20 away from each other, until the steel sleeve 1 and the steel pipe 2 are properly supported and fixed. Simultaneously, the adjusting components can... This mechanism allows multiple fixing components to unfold synchronously, ensuring that each component unfolds at the same speed and size. This guarantees the relative distance between the steel sleeve 1 and the steel pipe 2 in all directions, improving the efficiency and accuracy of fixing the steel sleeve 1 and the steel pipe 2. When the fixing components need to be removed, the rotating wheel 4 can be rotated in the opposite direction, causing the connecting rod 3 to reverse. This, in turn, causes the connecting rod 3 to move the two adjusting components away from each other and reset via the guide rod 5 with threads 6. The two adjusting components then pull the first connecting rod 14 and the second connecting rod 15 to reset via the hinge 13. The first connecting rod 14 and the second connecting rod 15 then move the first support plate 17 and the second support plate 20 to stop supporting and fixing via the first connecting piece 16 and the second connecting piece 19. Finally, the worker can remove the adjusting components and fixing components from inside the steel sleeve 1 and the steel pipe 2 via the connecting rod 3.

[0026] The temporary fixing method for the inner and outer pipes of buried steel-jacketed pipes includes the following steps: S1. Place the retracted adjustment component and fixing component between the steel sleeve 1 and the steel pipe 2, and use the connecting rod 3 and the rotating wheel 4 to push the adjustment component and fixing component to a distance of 0.5-1 meter from the ends of the steel sleeve 1 and the steel pipe 2; S2. Rotate the rotating wheel 4 so that the rotating wheel 4 drives the adjusting component to work through the connecting rod 3, so that the adjusting component controls the fixing component to be fixed between the steel sleeve 1 and the steel pipe 2; S3. Weld the fixed steel pipe 2, and remove the adjusting and fixing components from the inside of the steel sleeve 1 and the steel pipe 2 after welding.

[0027] Working principle: The operator holds the connecting rod 3, which drives the adjusting component and the fixing component to align and insert them into the insulation layer between the steel sleeve 1 and the steel pipe 2. The operation continues until the adjusting component and the fixing component are inserted into the appropriate position of the insulation layer between the steel sleeve 1 and the steel pipe 2. Then, the operator rotates the rotating wheel 4, which drives the connecting rod 3 to rotate. This causes the connecting rod 3 to drive the two adjusting components to move closer to each other through the guide rod 5 with threads 6. The two adjusting components then cause the fixing component to deform and unfold, supporting and fixing the steel sleeve 1 and the steel pipe 2 to ensure the relative position between the inner and outer pipes and to protect the insulation layer. By installing adjustment and fixing components between the steel sleeve 1 and the steel pipe 2, the relative movement of the steel sleeve 1 and the steel pipe 2 in the axial and radial directions is supported and fixed, preventing the steel pipe 2 from squeezing the insulation layer downward under the action of gravity. It is also easy to remove and reuse after installation, does not affect the final welding and sliding function of the pipeline, and does not damage the anti-corrosion layer, insulation layer and port of the steel sleeve 1 and the steel pipe 2. It has low requirements for the operator.

[0028] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline, characterized in that, include: A steel sleeve (1), a steel pipe (2) and a connecting rod (3) are provided. The steel pipe (2) is inserted into the inside of the steel sleeve (1). A connecting rod (3) is inserted between the steel sleeve (1) and the steel pipe (2). A rotating wheel (4) is fixedly connected to one end of the connecting rod (3). An adjusting assembly is used to adapt to steel sleeves (1) and steel pipes (2) of different diameters, and the adjusting assembly is connected to the connecting rod (3); A fixing component is used to support and fix the steel sleeve (1) and the steel pipe (2), and the fixing component is connected to the adjusting component.

2. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 1, characterized in that, The adjustment assembly includes two adjustment components, each of which includes multiple arc-shaped parts (7), with an arc-shaped sleeve (8) inserted between each pair of adjacent arc-shaped parts (7).

3. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 2, characterized in that, The arc-shaped component (7) and the arc-shaped sleeve (8) are internally connected to a limiting block (9), and a screw (10) is rotatably connected to one side of the limiting block (9). The screw (10) is threadedly connected to the inside of the arc-shaped component (7).

4. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 2, characterized in that, One of the adjustment components has a guide rod (5) rotatably connected inside the multiple arc-shaped parts (7) of the other adjustment component. The guide rod (5) is inserted into the multiple arc-shaped parts (7) of the other adjustment component.

5. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 4, characterized in that, One of the guide rods (5) has a thread (6) on its outer wall. The connecting rod (3) is fixedly connected to the end of the guide rod (5) with the thread (6). The thread (6) is threadedly connected to the inside of the arc-shaped part (7) near the connecting rod (3).

6. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 2, characterized in that, Elastic ropes (12) are inserted inside the arc-shaped sleeve (8) and the limiting block (9). Both ends of the elastic ropes (12) are fixedly connected to limiting beads (11). The limiting beads (11) are inserted inside the arc-shaped part (7) and the arc-shaped sleeve (8). The limiting beads (11) abut against the outer wall of the limiting block (9).

7. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 4, characterized in that, The fixing assembly includes a hinge (13) fixedly installed on the outer wall of the two adjustment components arc-shaped parts (7). The hinge (13) is sleeved on the outer wall of the guide rod (5). The hinge (13) has a first connecting rod (14) and a second connecting rod (15) hinged inside.

8. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 7, characterized in that, The first connecting rod (14) is rotatably connected to the end away from the hinge (13) with a first connecting member (16), and the outer wall of the first connecting member (16) is fixedly connected to a first support plate (17), and the side of the first support plate (17) away from the first connecting member (16) is fixedly connected to a first soft pad (18).

9. The temporary fixing device for the inner and outer pipes of a buried steel-jacketed pipeline according to claim 7, characterized in that, The second connecting rod (15) is rotatably connected to the end away from the hinge (13) by a second connecting member (19), and the outer wall of the second connecting member (19) is fixedly connected to a second support plate (20), and the side of the second support plate (20) away from the second connecting member (19) is fixedly connected to a second soft pad (21).

10. A method for temporary fixing of the inner and outer pipes of a buried steel-jacketed pipe as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the adjustment and fixing components in the contracted state between the steel sleeve (1) and the steel pipe (2), and use the connecting rod (3) and the rotating wheel (4) to push the adjustment and fixing components to a distance of 0.5-1 meter from the ends of the steel sleeve (1) and the steel pipe (2); S2. Rotate the wheel (4) so ​​that the wheel (4) drives the adjustment component to work through the connecting rod (3), so that the adjustment component controls the fixing component to be fixed between the steel sleeve (1) and the steel pipe (2); S3. Weld the fixed steel pipe (2), and remove the adjustment and fixing components from the inside of the steel sleeve (1) and the steel pipe (2) after welding.

Images