Pipeline replacement compensator

Abstract

The utility model discloses a pipeline replacement compensator, which belongs to the technical field of gas production and transmission pipeline installation engineering and comprises an inner pipe, an outer pipe, a loop type flange I and a loop type flange II, the relative distance of the inner pipe and the outer pipe can be adjusted, one end of the inner pipe is connected with an inner pipe flange, and the end, close to the inner pipe flange, of the outer pipe is connected with an outer pipe rear flange. The other end of the outer pipe is connected with an outer pipe front flange, the outer pipe front flange is connected with a loop type flange I in a fastening mode through a bolt I and a nut, and an outer pipe rear flange, an inner pipe flange and a loop type flange II are connected in a fastening mode through adjustable bolts and nuts. The problems of long construction time and long pipeline gas stopping time caused by low construction efficiency and low quality of small-caliber gas production and transmission pipeline engineering in Sichuan Basin or hilly land in the prior art are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas extraction and transmission pipeline installation engineering, and specifically relates to a pipeline pipe replacement compensator. Background Art

[0002] In the construction of gas pipeline projects, pipeline installation in flat areas generally adopts advance planning, terrain survey, and pipeline direction determination, and then measurement, line laying, and trench excavation. The design department designs a route map and compiles a construction results table. The construction party prefabricates and numbers the pipeline according to the results table. Every day, the on-site material workers issue materials according to the pile numbers on the construction results table, and the construction personnel install the materials. The construction is relatively simple. In the Sichuan Basin or hilly areas, the mountains are undulating, and in some places, the pipelines are laid by hand, which makes the pipeline installation doubly difficult.

[0003] In the construction of small-diameter gas pipeline projects in the Sichuan Basin or hilly areas, the layout is complex and there are many elbows. Small-diameter pipelines are generally constructed manually. Workers cut and prepare materials on site according to the terrain. They usually use traditional tools such as spirit levels, tape measures, plumb bobs, and angle rulers to assist in measurement. According to the "Industrial Metal Pipeline Engineering Construction Specifications", when connecting straight pipe interfaces, if there are bends, they must be straightened to maintain the straightness of the steel pipe. The misalignment of the pipe ends should not exceed 20% of the pipe wall thickness. If the traditional manual cutting method is used for pipeline emergency rescue work, the measurement is slow and inaccurate, resulting in long construction time and long pipeline gas outage time.

[0004] When using traditional tools such as spirit levels, tape measures, plumb bobs, and angle rulers, operators need to cooperate with each other. The technical requirements for installers in pipe replacement and joint operations are relatively high, and the tacit understanding of mutual cooperation is very important. In particular, the last golden mouth refers to a part of the weld that does not require a pressure test during the welding process. For example, if the pipeline and equipment are directly connected and connected by a weld, if a pressure test is required, unless the entire equipment is put under pressure test, a blind plate must be welded to separate the equipment. This mouth is called the golden mouth, and it is welded after the pipeline is pressure tested. This mouth requires the welding worker to weld successfully at one time, and after testing, it fully meets various process requirements. This places extremely high demands on the quality of pipe joint connection, and the misalignment, gap, etc. must meet the welding requirements.

[0005] Based on the above technical background, it is urgent to find more advanced and practical methods or auxiliary equipment to improve the construction efficiency and quality of small-diameter gas pipeline projects in the Sichuan Basin or hilly areas, and reduce construction time and pipeline gas outage time. Utility Model Content

[0006] The utility model aims to solve the problems in the prior art that the construction efficiency of small-diameter gas production and transportation pipeline projects in the Sichuan Basin or hilly areas is low, the quality is not high, resulting in longer construction time and pipeline gas shutdown time.

[0007] In order to achieve the above invention purpose, the technical solution of the utility model is as follows:

[0008] The pipeline pipe replacement compensator includes an inner pipe and an outer pipe with adjustable relative distance, as well as loose flange I and loose flange II. One end of the inner pipe is connected with an inner pipe flange, and the end of the outer pipe close to the inner pipe flange is connected with a rear flange of the outer pipe; the other end of the outer pipe is connected with a front flange of the outer pipe, and the front flange of the outer pipe is tightly connected with the loose flange I through bolts I and nuts. The rear flange of the outer pipe, the inner pipe flange and the loose flange II are tightly connected through adjustable bolts and nuts.

[0009] Further, the outer pipe is a pipe with adjustable length, and the outer pipe is respectively welded to the front flange of the outer pipe and the rear flange of the outer pipe to form an integral body.

[0010] Further, the inner pipe is connected with the inner pipe flange by welding.

[0011] Further, an annular groove is formed in the inner wall of the rear flange of the outer pipe, and a sealing ring is arranged in the annular groove. The rear flange of the outer pipe is tightly connected with the inner pipe through the cooperation of the annular groove and the sealing ring.

[0012] Further, the sealing ring is an O-shaped or V-shaped sealing ring.

[0013] Further, the tail of the adjustable bolt is a bolt with a square structure.

[0014] Further, the loose flange I is sleeved on the port of the pipeline I to be connected, and the loose flange I is rotatably connected with the pipeline I.

[0015] Further, the loose flange II is sleeved on the port of another pipeline II to be connected, and the loose flange II is rotatably connected with the pipeline II.

[0016] Further, the inner pipe is a full-bore pipe.

[0017] Further, the inner diameter of the inner pipe is equal to the inner diameters of the pipeline I and the pipeline II.

[0018] The beneficial effects of the utility model:

[0019] I. In the present utility model, a pipe replacement compensator with a simple and ingenious structure is proposed. It is easy to install and has low requirements for workers. The relative distance between the inner pipe and the outer pipe can be adjusted, that is, the length of the entire compensator can be adjusted according to on-site requirements. At the same time, loose flanges are used at both ends for butt joint connection. The loose flange and the pipeline to be connected can be rotated 360° in the radial direction for butt joint adjustment, and finally, methods such as welding are used for sealing and reinforcement. This pipe replacement compensator is particularly suitable for the construction process of small-diameter gas gathering and transportation pipelines in the Sichuan Basin or hilly areas, improving construction efficiency and quality, reducing construction time and pipeline shutdown time. This also helps to enhance the overall safety and reliability of the pipeline project, providing a strong guarantee for local energy supply and economic development.

[0020] II. In the present utility model, the outer pipe is a pipe with adjustable length, which can be applied to various working conditions. The outer pipe is welded to the front flange of the outer pipe and the rear flange of the outer pipe as a whole, and the inner pipe and the inner pipe flange are connected by welding to ensure the sealing performance of the entire processed pipe assembly and meet the construction requirements.

[0021] III. In the present utility model, an annular groove is provided on the inner wall of the rear flange of the outer pipe, and a sealing ring is placed in the annular groove. The rear flange of the outer pipe is tightly connected to the inner pipe through the cooperation of the annular groove and the sealing ring. The sealing ring is preferably an O-shaped or V-shaped sealing ring to ensure the sealing effect between the rear flange of the outer pipe and the inner pipe and prevent the medium in the pipeline from leaking.

[0022] IV. In the present utility model, the tail of the adjustable bolt is a bolt with a square structure, which is convenient for operation when tightening the bolt and adjusting the length of the expansion pipe.

[0023] V. In the present utility model, the loose flange I is sleeved on the port of the pipeline I to be connected, and the loose flange I is rotatably connected to the pipeline I; the loose flange II is sleeved on the port of another pipeline II to be connected, and the loose flange II is rotatably connected to the pipeline II, that is, it is convenient to rotate 360° in the radial direction for butt joint adjustment when installing this pipe replacement compensator, which is convenient for operation.

[0024] VI. In the present utility model, the inner pipe is a full-bore pipe. Preferably, the inner diameter of the inner pipe is equal to the inner diameters of the pipeline I and the pipeline II, and pigging and ball passing operations are not affected after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the pipe replacement compensator.

[0026] Figure 2 is a schematic structural diagram of another embodiment of the pipe replacement compensator.

[0027] Figure 3 is a structural diagram of the pipe replacement compensator in the use state.

[0028] Among them, 1. inner pipe; 2. outer pipe; 3. loose flange I; 4. loose flange II; 5. inner pipe flange; 6. rear flange of outer pipe; 7. front flange of outer pipe; 8. bolt I; 9. nut; 10. adjustable bolt; 11. annular groove; 12. weld seam; 13. pipeline I; 14. pipeline II; 10.1. square structure. Specific implementation mode

[0029] The present utility model will be further described in detail below in conjunction with embodiments, but the implementation modes of the present utility model are not limited thereto.

[0030] In this solution, orientation words such as "front" and "rear" are not used to limit the structure / component itself, but to more clearly indicate the components included in this solution and to more clearly explain the installation method of the components. In the following embodiments, based on the flow direction of the medium in the pipeline, the flange connected to the outer pipe and closer to the front is determined as the "front flange of the outer pipe", and the flange connected to the outer pipe and closer to the rear is determined as the "rear flange of the outer pipe". The structures of the "front flange of the outer pipe" and the "rear flange of the outer pipe" can be the same.

[0031] Embodiment 1

[0032] This embodiment is one of the basic implementation modes. The pipeline pipe replacement compensator belongs to the technical field of oil and gas transportation pipeline installation engineering, and includes an inner pipe 1 and an outer pipe 2 with adjustable relative distance. Refer to Figure 1 , as well as a loose flange I 3 and a loose flange II 4. One end of the inner pipe 1 is connected with an inner pipe flange 5, and the end of the outer pipe 2 close to the inner pipe flange 5 is connected with a rear flange 6 of the outer pipe; the other end of the outer pipe 2 is connected with a front flange 7 of the outer pipe. The front flange 7 of the outer pipe is tightly connected with the loose flange I 3 through a bolt I 8 and a nut 9. The rear flange 6 of the outer pipe, the inner pipe flange 5 and the loose flange II 4 are tightly connected through an adjustable bolt 10 and a nut 9.

[0033] During use, the loose flange I 3 and the loose flange II 4 are respectively sleeved on the pipelines for transporting oil and gas to be connected. Figure 1 The hollow arrow in represents the flow direction of the medium in the pipeline. According to the specific position and distance of the pipelines to be connected, a pipeline pipe replacement compensator with an outer pipe 2 of appropriate length is selected, and the inner pipe 1 and the outer pipe 2 of the pipeline pipe replacement compensator are placed in an appropriate relative position, and the bolt I 8, the adjustable bolt 10 and the nut 9 are assembled according to the schematic diagram in Figure 1 to ensure that the inner pipe 1 and the outer pipe 2 are coaxial. This pipeline pipe replacement compensator is convenient to use and has low requirements for operators.

[0034] Embodiment 2

[0035] This embodiment is a further optimization on the basis of Embodiment 1. The difference is that the outer pipe 2 is a pipeline with adjustable length. Refer toFigure 1 The outer tube 2 is respectively welded to the front flange 7 of the outer tube and the rear flange 6 of the outer tube to form an integral body. Figure 1 The weld 12 is indicated at all the reference signs 12 in the drawings.

[0036] Example 3

[0037] Compared with Examples 1-2, the difference in this example is that the inner tube 1 and the inner tube flange 5 are connected by welding.

[0038] Example 4

[0039] Compared with Examples 1-3, the difference in this example is that an annular groove 11 is provided on the inner wall of the rear flange 6 of the outer tube. Refer to Figure 2 , a sealing ring is arranged in the annular groove 11, and the rear flange 6 of the outer tube is tightly connected to the inner tube 1 through the cooperation of the annular groove 11 and the sealing ring.

[0040] Preferably, the sealing ring is an O-ring or a V-ring.

[0041] Example 5

[0042] Compared with Examples 1-4, the difference in this example is that the tail of the adjustable bolt 10 is a bolt with a square structure 10.1. Refer to Figure 2 , which is convenient for use when tightening the adjustable bolt 10 and adjusting the length of the telescopic tube (inner tube 1 and outer tube 2).

[0043] Example 6

[0044] Compared with Examples 1-5, the difference in this example is that, refer to Figure 3 , the loose flange I 3 is sleeved on the port of the pipeline I 13 to be connected, and the loose flange I 3 is rotatably connected to the pipeline I 13.

[0045] Preferably, the loose flange II 4 is sleeved on the port of another pipeline II 14 to be connected, and the loose flange II 4 is rotatably connected to the pipeline II 14.

[0046] Example 7

[0047] Compared with Examples 1-6, the difference in this example is that the inner tube 1 is a full-bore tube.

[0048] Example 8

[0049] Compared with Examples 1-7, the difference in this example is that the inner diameter of the inner tube 1 is equal to the inner diameters of the pipeline I 13 and the pipeline II 14.

[0050] Example 9

[0051] For the convenience of the public to understand this solution, in this embodiment, a relatively optimal pipe replacement compensator structure is taken as an example to further illustrate this solution.

[0052] Reference Figure 2 、 3 , the pipe replacement compensator includes an inner pipe 1 and an outer pipe 2 whose relative distance can be adjusted, as well as a loose flange I 3 and a loose flange II 4. One end of the inner pipe 1 is connected with an inner pipe flange 5, and the end of the outer pipe 2 close to the inner pipe flange 5 is connected with a rear outer pipe flange 6; the other end of the outer pipe 2 is connected with a front outer pipe flange 7, and the front outer pipe flange 7 is fixedly connected with the loose flange I 3 through bolts I 8 and nuts 9. The rear outer pipe flange 6, the inner pipe flange 5 and the loose flange II 4 are fixedly connected through adjustable bolts 10 and nuts 9. The adjustable bolt 10 is used to fix the outer pipe 2 and the inner pipe 1 and ensure that the outer pipe 2 and the inner pipe 1 are coaxial. The adjustable bolt 10 is also one of the components that can be adjusted in length.

[0053] In this embodiment, the outer pipe 2 is a pipe with adjustable length, and the outer pipe 2 is welded to the front outer pipe flange 7 and the rear outer pipe flange 6 as a whole.

[0054] In this embodiment, the inner pipe 1 is connected to the inner pipe flange 5 by welding.

[0055] In this embodiment, an annular groove 11 is provided on the inner wall of the rear outer pipe flange 6, and a sealing ring is arranged in the annular groove 11. The rear outer pipe flange 6 is tightly connected with the inner pipe 1 through the cooperation of the annular groove 11 and the sealing ring.

[0056] In this embodiment, the sealing ring is an O-ring.

[0057] In this embodiment, the tail of the adjustable bolt 10 is a bolt with a square structure 10.1, which can be used when tightening the bolt and adjusting the length of the telescopic pipe.

[0058] In this embodiment, the loose flange I 3 is sleeved on the port of the pipeline I 13 to be connected, and the loose flange I 3 is rotatably connected with the pipeline I 13.

[0059] In this embodiment, the loose flange II 4 is sleeved on the port of another pipeline II 14 to be connected, and the loose flange II 4 is rotatably connected with the pipeline II 14.

[0060] In this embodiment, the inner pipe 1 is a full-bore pipe.

[0061] In this embodiment, the inner diameter of the inner pipe 1 is equal to the inner diameters of the pipeline I 13 and the pipeline II 14.

[0062] The pipe replacement compensator is reasonably designed and convenient to use. The device uses loose flanges for butt welding and can be rotated 360° in the radial direction for butt adjustment. In addition, the pipe replacement compensator can be extended or shortened to a certain extent in the axial direction of the pipe. In this embodiment, the adjustable length L is designed to be 255 - 300 mm, which can reduce the error and precision of manual blanking, lower the requirement for butt accuracy, and greatly shorten the butt time. Moreover, the pipe replacement compensator can be installed underground, on the ground, or underwater. After installation, the telescopic function of the compensator can be used to achieve functions such as segmented isolation and segmented replacement of the pipeline. In addition, the device adopts a full-bore design and does not affect pigging and ball passing after installation.

Claims

1. Pipeline replacement compensator, characterized by: The invention comprises an inner tube (1) and an outer tube (2) whose relative distance can be adjusted, and a slip-on flange I (3) and a slip-on flange II (4). One end of the inner tube (1) is connected to an inner tube flange (5), and the end of the outer tube (2) close to the inner tube flange (5) is connected to an outer tube rear flange (6); the other end of the outer tube (2) is connected to an outer tube front flange (7), and the outer tube front flange (7) is fastened to the slip-on flange I (3) by bolts I (8) and nuts (9), and the outer tube rear flange (6), the inner tube flange (5) and the slip-on flange II (4) are fastened to each other by adjustable bolts (10) and nuts (9).

2. The pipeline replacement compensator according to claim 1 is characterized in that: The outer tube (2) is a pipe with adjustable length, and the outer tube (2) is welded to the outer tube front flange (7) and the outer tube rear flange (6) to form a whole.

3. The pipeline replacement compensator according to claim 1 is characterized in that: The inner tube (1) and the inner tube flange (5) are connected by welding.

4. The pipeline replacement compensator according to claim 1 is characterized in that: An annular groove (11) is provided on the inner wall of the outer tube rear flange (6), a sealing ring is built into the annular groove (11), and the outer tube rear flange (6) is tightly connected to the inner tube (1) through the cooperation of the annular groove (11) and the sealing ring.

5. The pipeline replacement compensator according to claim 4 is characterized in that: The sealing ring is an O-type or V-type sealing ring.

6. The pipeline replacement compensator according to claim 1 is characterized in that: The tail of the adjustable bolt (10) is a bolt with a square structure (10.1).

7. The pipeline replacement compensator according to claim 1 is characterized in that: The slip-on flange I (3) is sleeved on the port of the pipeline I (13) to be connected, and the slip-on flange I (3) is rotatably connected to the pipeline I (13).

8. The pipeline replacement compensator according to claim 7, characterized in that: The slip-on flange II (4) is sleeved on the port of another pipe II (14) to be connected, and the slip-on flange II (4) is rotatably connected to the pipe II (14).

9. The pipeline replacement compensator according to claim 8, characterized in that: The inner tube (1) is a full-diameter tube.

10. The pipeline replacement compensator according to claim 9, characterized in that: The inner diameter of the inner tube (1) is equal to the inner diameters of pipeline I (13) and pipeline II (14).

Images