Connecting device for natural gas pipeline pressure test

Abstract

The utility model discloses a connecting device for natural gas pipeline pressure test, and relates to the technical field of natural gas pipelines. The device comprises two connecting plates which are symmetrically arranged from left to right, the opposite side faces of the two connecting plates are each provided with two limiting blocks which are symmetrically arranged from front to back, and the peripheral side walls of the front portions and the rear portions of the connecting plates are each provided with a movable arc plate with the limiting blocks at the same height position. A positioning rod is arranged between the two connecting plates below the pipeline body, a movable block is arranged between the two connecting plates, a supporting plate is arranged on the upper end face of the movable block, and a lifting air cylinder is fixed into the notch. The transverse air cylinder drives the two limiting blocks to support and extrude the inner side face of the pipeline body, so that it is guaranteed that the position of the pipeline body is stable, the movable blocks slide along the positioning rods, and the problems that due to the fact that the pipeline deviates, air circulation occurs in the pipeline, and the function of adjusting supporting points of the pipeline is not achieved are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas pipelines, in particular to a connecting device used for pressure testing of natural gas pipelines. Background Art

[0002] The pressure test of natural gas pipeline is an important part to ensure the safety of pipeline. During the pressure test, it is necessary to strictly follow the safety standards and operating procedures. In the pressure test of natural gas pipeline, compressed gas is often used to pressurize the outside of the pipeline to determine whether the pipeline is leaking or ruptured. At the same time, in order to ensure the stability of the pressure test of natural gas pipeline, it is necessary to use corresponding connection devices to connect and seal the natural gas pipeline. However, it still has the following disadvantages in actual use:

[0003] 1. When the existing natural gas pipeline pressure test connection device is used, it is unable to ensure the stability of the pipeline, so during the pressure test, it is easy to cause the pipeline to deviate, resulting in air circulation inside the pipeline, which will cause the pressure test work to be unable to proceed normally.

[0004] 2. When the existing natural gas pipeline pressure test connection device is used to support the pipeline, it does not have the function of adjusting the supporting point of the pipeline, which will affect the support stability of the pipeline. Utility Model Content

[0005] The purpose of the utility model is to provide a connection device for natural gas pipeline pressure testing, which drives two limit blocks to support the inner side of the pipeline body through a transverse cylinder, so as to ensure the stability of the position of the pipeline body and the sliding of the movable block along the positioning rod, thereby solving the problem of pipeline deviation, resulting in air circulation inside the pipeline and the lack of the function of adjusting the support point of the pipeline.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a connection device for pressure testing of natural gas pipelines, comprising two connection plates which are symmetrically arranged from left to right, two limit blocks which are symmetrically arranged from front to back are arranged on opposite sides of the two connection plates, movable arc plates with the limit blocks at the same height are arranged on the peripheral side walls at the front and rear of the connection plates, a pipeline body is arranged between the two connection plates, a positioning rod is arranged between the two connection plates below the pipeline body, a movable block is arranged between the two connection plates, a support plate is arranged on the upper end surface of the movable block, a notch is penetrated through the middle side surface of the movable block, a lifting cylinder is fixed inside the notch, and the piston end of the lifting cylinder is fixedly connected to the support plate.

[0008] Furthermore, sliding openings are provided at positions of the limiting blocks corresponding to the end surfaces of the two connecting plates, and the inner end surfaces of the sliding openings are provided with moving openings that penetrate the circumference of the connecting plates.

[0009] Furthermore, a sliding block which is closely fitted in the inner position of the sliding opening is fixed to the end surface of the limiting block opposite to the pipe body.

[0010] Furthermore, a sealing column that slides inside the moving opening is fixed to the end surface of the sliding block opposite to the limiting block, and the ends of the sealing column that pass through the moving opening are respectively fixedly connected to the moving arc plate.

[0011] Furthermore, two symmetrically arranged transverse cylinders are fixed to opposite end surfaces of the two connecting plates, and piston ends of the transverse cylinders are respectively fixedly connected to adjacent movable arc plates.

[0012] Furthermore, vertical plates are fixed at the peripheral positions below the connecting plate, and positioning holes are penetrated through the side walls of the vertical plates at the positions corresponding to the positioning rods, and the two ends of the positioning rods slide through the inner positions of the positioning holes respectively.

[0013] Furthermore, through holes are provided on the side surfaces of the movable block located in front and behind the notch, and the middle portion of the positioning rod slides through the interior of the through hole.

[0014] The utility model has the following beneficial effects:

[0015] 1. When the utility model is in use, the horizontal cylinder is controlled to work, and the horizontal cylinder will drive the movable arc plate to move in the direction away from the connecting plate, and then the movable arc plate will drive the sealing column to move inside the movable port, and then the sealing column will drive the slider to slide in the internal position of the sliding port, and at this time the slider will drive the limit block to squeeze the inner wall of the pipeline body, so that the pipeline body is squeezed and limited by the two limit blocks, ensuring that the two ends of the pipeline body are connected and sealed, so that the gas inside the pipeline body will not flow, and then at this time the pressure test equipment can be used to perform pressure testing on the pipeline body, so as to ensure the stability of the pipeline body during the pressure test.

[0016] 2. When the utility model is in use, the movable block is controlled to move to the position below the pipe body, and then the movable block will drive the support plate to move with it, and the lifting cylinder can be controlled to work, and then the lifting cylinder will push the support plate to connect with the peripheral side of the pipe body, so that the support plate can support the pipe body, and the position of the movable block can be displaced, so that the support plate can support different positions of the pipe body. Therefore, after the two pipe bodies are connected, the support plate can be moved to the connection of the two pipe bodies and support it through the sliding of the movable block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural diagram of the connecting plate, the limiting block and the movable arc plate in the utility model;

[0020] Figure 3 This is a structural diagram of the limit block, movable arc plate and transverse cylinder in the utility model;

[0021] Figure 4 This is a structural diagram of the connecting plate in the utility model;

[0022] Figure 5 It is a structural diagram of the movable block in the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Connecting plate; 101. Vertical plate; 102. Positioning hole; 103. Sliding opening; 104. Moving opening; 2. Pipe body; 3. Movable block; 301. Through hole; 302. Notch; 303. Lifting cylinder; 304. Support plate; 4. Positioning rod; 5. Limiting block; 501. Sliding block; 502. Sealing column; 6. Moving arc plate; 7. Horizontal cylinder. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-5 As shown, the utility model is a connection device for natural gas pipeline pressure testing, comprising two connection plates 1 symmetrically arranged from left to right, two limit blocks 5 symmetrically arranged from front to back are arranged on the opposite sides of the two connection plates 1, and movable arc plates 6 with the limit blocks 5 at the same height are arranged on the peripheral side walls of the front and rear sides of the connection plates 1. A pipeline body 2 is arranged between the two connection plates 1, a positioning rod 4 is arranged between the two connection plates 1 below the pipeline body 2, and a movable block 3 is arranged between the two connection plates 1. A support plate 304 is arranged on the upper end surface of the movable block 3, and a recess 302 is penetrated through the middle side of the movable block 3, and a lifting cylinder 303 is fixed inside the recess 302, and the piston end of the lifting cylinder 303 is fixedly connected to the support plate 304. By using the lifting cylinder 303, the support plate 304 can be pushed to move up and down, thereby supporting the pipeline body 2.

[0027] Among them Figure 1-4As shown, sliding openings 103 are provided at the positions of the limit blocks 5 on the opposite end surfaces of the two connecting plates 1, and moving openings 104 that penetrate the circumferential positions of the connecting plates 1 are provided on the inner end surfaces of the sliding openings 103, and sliding blocks 501 that fit tightly inside the sliding openings 103 are fixed to the end surfaces of the limit blocks 5 opposite to the pipe body 2, and sealing columns 502 that slide inside the moving openings 104 are fixed to the end surfaces of the sliding blocks 501 opposite to the limit blocks 5, and the ends of the sealing columns 502 that pass through the moving openings 104 are respectively fixedly connected to the moving arc plates 6, and because the sliding blocks 501 are located inside the moving openings 104, the sliding blocks 501 drive the limit blocks 5 to squeeze the inner side walls of the pipe body 2, and at the same time, the sealing columns 502 and the sliding blocks 501 will seal the moving openings 104 and the sliding openings 103, to ensure that the air inside the pipe body 2 will not flow out from the inside of the moving openings 104 and the sliding openings 103, and to ensure that the air inside the pipe body 2 will not circulate.

[0028] Among them Figure 1 , 4 As shown in Figures 5 and 6, two symmetrically arranged transverse cylinders 7 are fixed to the opposite end surfaces of the two connecting plates 1, and the piston ends of the transverse cylinders 7 are respectively fixedly connected to the adjacent movable arc plates 6. Vertical plates 101 are fixed to the peripheral positions below the connecting plates 1, and the side walls of the vertical plates 101 are penetrated with positioning holes 102 at the positions corresponding to the positioning rods 4, and the two ends of the positioning rods 4 slide through the inner positions of the positioning holes 102 respectively, and the side surfaces of the movable blocks 3 located at the front and rear of the recesses 302 are each provided with through holes 301, and the middle position of the positioning rods 4 slides through the inside of the through holes 301. Since the positioning rods 4 directly penetrate the positioning holes 102 and the through holes 302, the positioning holes 102 and the through holes 302 are formed on the movable blocks 3. After the hole 301 is positioned, the vertical plate 101 and the movable block 3 can slide along the positioning rod 4. Therefore, when the two pipe bodies 2 are connected between the two connecting plates 1, the two connecting plates 1 can respectively block the opposite end faces of the two pipe bodies 2. At the same time, the two ends of the positioning rod 4 do not have a limiting function. In order to adjust the width between the two connecting plates 1, the positioning rod 4 can be moved out from the internal position of the positioning hole 102 and the through hole 301, the positioning rod 4 can be replaced, and the positioning rod 4 can be slid and inserted into the internal position of the positioning hole 102 and the through hole 301 again, and the width of the two connecting plates 1 can be adjusted.

[0029] A specific application of this embodiment is: through the use of the above-mentioned structure, when it is necessary to perform pressure testing on the natural gas pipeline, the two ends of the pipeline body 2 are respectively connected to the end faces of the connecting plate 1, so that the two limit blocks 5 on the end faces are both located in the internal position of the pipeline body 2, thereby controlling the operation of the transverse cylinder 7, the transverse cylinder 7 will drive the movable arc plate 6 to move away from the connecting plate 1, and then the movable arc plate 6 will drive the sealing column 502 to move inside the movable port 104, and then the sealing column 502 will drive the slider 501 to slide in the internal position of the sliding port 103, and at this time the slider 501 will drive the limit blocks 5 to squeeze the inner wall of the pipeline body 2, so that The pipeline body 2 is squeezed and limited by two limit blocks 5 to ensure that the two ends of the pipeline body 2 are connected and sealed, so that the gas inside the pipeline body 2 will not flow, and then the pipeline body 2 can be pressure tested by the pressure testing equipment at this time, and the movable block 3 can be controlled to move below the pipeline body 2, and then the movable block 3 will drive the support plate 304 to move with it, and the lifting cylinder 303 can be controlled to work, and then the lifting cylinder 303 will push the support plate 304 to connect with the surrounding side of the pipeline body 2, so that the support plate 304 can support the pipeline body 2, and the position of the movable block 3 can be displaced, so that the support plate 304 can support different positions of the pipeline body 2.

[0030] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A connection device for natural gas pipeline pressure testing, comprising two connection plates (1) symmetrically arranged from left to right, characterized in that: Two limiting blocks (5) symmetrically arranged from front to back are arranged on opposite sides of the two connecting plates (1); movable arc plates (6) at the same height position of the limiting blocks (5) are arranged on the peripheral side walls at the front and rear of the connecting plates (1); a pipe body (2) is arranged between the two connecting plates (1); a positioning rod (4) is arranged between the two connecting plates (1) below the pipe body (2); a movable block (3) is arranged between the two connecting plates (1); a support plate (304) is arranged on the upper end surface of the movable block (3); a recess (302) is penetrated through the middle side surface of the movable block (3); a lifting cylinder (303) is fixed inside the recess (302), and the piston end of the lifting cylinder (303) is fixedly connected to the support plate (304).

2. A connection device for natural gas pipeline pressure testing according to claim 1, characterized in that: The opposite end surfaces of the two connecting plates (1) are provided with sliding openings (103) at positions corresponding to the limit blocks (5), and the inner end surfaces of the sliding openings (103) are provided with moving openings (104) that penetrate the circumference of the connecting plates (1).

3. A connection device for natural gas pipeline pressure testing according to claim 2, characterized in that: The end surface of the limit block (5) opposite to the pipe body (2) is fixed with a sliding block (501) which is tightly fitted in the inner position of the sliding opening (103).

4. A connection device for natural gas pipeline pressure testing according to claim 3, characterized in that: The end surface of the sliding block (501) opposite to the limit block (5) is fixed with a sealing column (502) that slides inside the moving opening (104), and the ends of the sealing column (502) that pass through the moving opening (104) are respectively fixedly connected to the moving arc plate (6).

5. A connection device for natural gas pipeline pressure testing according to claim 1, characterized in that: Two symmetrically arranged transverse cylinders (7) are fixed to opposite end surfaces of the two connecting plates (1), and the piston ends of the transverse cylinders (7) are respectively fixedly connected to the adjacent movable arc plates (6).

6. A connection device for natural gas pipeline pressure testing according to claim 1, characterized in that: Vertical plates (101) are fixed at the peripheral positions below the connecting plate (1), and positioning holes (102) are penetrated through the side walls of the vertical plates (101) at the positions corresponding to the positioning rods (4), and the two ends of the positioning rods (4) slide through the internal positions of the positioning holes (102) respectively.

7. A connection device for natural gas pipeline pressure testing according to claim 6, characterized in that: The side surfaces of the movable block (3) located in front and behind the notch (302) are both provided with through holes (301), and the middle portion of the positioning rod (4) slides through the interior of the through hole (301).

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