Pipeline pressure testing machine

Abstract

The invention discloses a pipeline pressure testing machine, which belongs to the field of pipeline testing and comprises a testing frame, a front fixing mechanism and a rear fixing mechanism are oppositely arranged on the testing frame along the length direction of the testing frame, the front fixing mechanism comprises a front support, a front top plate moving along the length direction of the testing frame is arranged on the front support, and a rear top plate moving along the length direction of the testing frame is arranged on the rear support. The front top plate is provided with a water injection hole and an exhaust hole at the side of the rear fixing mechanism, the water injection hole is communicated with a water injection pipe, the exhaust hole is communicated with an exhaust pipe, the exhaust pipe is communicated with a pressure testing mechanism and a discharge valve through a connecting pipe, and the front support is provided with a pipeline clamping mechanism at the side of the rear fixing mechanism; the rear fixing mechanism comprises a rear support, a rear top plate moving in the length direction of the testing frame is arranged on the rear support, and a pipeline clamping mechanism is arranged on the side, on the front fixing mechanism, of the rear support. The invention aims to provide a pipeline pressure testing machine which can be used for testing the pressure of a pipeline.

Description

Technical Field

[0001] The invention relates to the field of pipeline testing, in particular to a pipeline pressure testing machine. Background Art

[0002] In the construction of water supply and drainage systems, pipelines are the core components of transmission, and their quality is directly related to the efficiency and safety of the entire system operation. Since pipelines are subject to great pressure during use, pressure testing of pipelines is a necessary means to ensure the safe operation of the system in which the pipelines are located. Summary of the invention

[0003] The object of the present invention is to provide a pipeline pressure testing machine capable of performing pressure testing on pipelines in view of the above problems.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is a pipeline pressure testing machine, which includes a test frame, on which a front fixing mechanism and a rear fixing mechanism are relatively arranged along the length direction of the test frame, and the distance between the front fixing mechanism and the rear fixing mechanism is adjusted according to the length of the pipeline to be tested; the front fixing mechanism includes a front bracket, on which a front top plate moving along the length direction of the test frame is arranged, and the front top plate is provided with a water injection hole and an exhaust hole on the side of the rear fixing mechanism, the water injection hole is connected with a water injection pipe, and the exhaust hole is connected with an exhaust pipe, and the exhaust pipe is connected with a pressure testing mechanism and a discharge valve through a connecting pipe, and a pipeline clamping mechanism is arranged on the front bracket on the side of the rear fixing mechanism; the rear fixing mechanism includes a rear bracket, on which a rear top plate moving along the length direction of the test frame is arranged, and a pipeline clamping mechanism is arranged on the rear bracket on the side of the front fixing mechanism.

[0005] Furthermore, in order to adjust the distance between the front fixing mechanism and the rear fixing mechanism to adapt to pipes of different lengths, a track is provided on the test frame, and the rear bracket slides on the track.

[0006] Furthermore, an angle is set between the connecting line between the front fixing mechanism and the rear fixing mechanism and the horizontal line, so that when the front and rear top plates release the pipeline, the water in the pipeline can be quickly discharged.

[0007] Furthermore, sealing gaskets are provided on opposite sides of the front top plate and the rear top plate to ensure the sealing of the pipeline end surface when the front top plate and the rear top plate are against the pipeline end surface.

[0008] Furthermore, in order to fix the pipeline, the pipeline clamping mechanism includes an upper clamping plate and a lower clamping plate which are arranged opposite to each other up and down, and the distance between the upper clamping plate and the lower clamping plate is adjusted along the radial direction of the pipeline to be tested.

[0009] Furthermore, one opening and closing method of the pipe clamping mechanism is that the lower clamping plate is fixedly arranged, the upper clamping plate is connected to one end of the connecting rod through a pin shaft, the middle part of the connecting rod is rotatably connected to the front bracket or the rear bracket, the other end of the connecting rod is rotatably connected to the piston rod of the linear drive device, and the cylinder body of the linear drive device is rotatably installed on the front bracket and the rear bracket.

[0010] Furthermore, a cushion block is provided on the lower clamping plate or the upper clamping plate to improve usability.

[0011] Furthermore, in order to adapt to pipelines of different diameters, the exhaust holes are arranged at intervals along the radial direction of the front top plate, the exhaust pipes correspond to the exhaust holes one by one, and a control valve is arranged on the exhaust pipes.

[0012] Furthermore, in order to exhaust the air in the pipeline as much as possible, the exhaust holes are arranged above the water injection holes, and the exhaust holes are arranged along the diameter of the front top plate perpendicular to the horizontal plane.

[0013] The beneficial effects of the present invention are as follows: the pipeline is hoisted onto the front fixing mechanism and the rear fixing mechanism, and then the front and rear top plates are moved toward the pipeline side to support the pipeline end face, and the pipeline clamping mechanism fixes the pipeline; then water is injected into the pipeline from the water injection hole, and during this process, the air in the pipeline is discharged from the exhaust hole. After the air is discharged, a high-pressure pump is used to replenish water and pressurize the pipeline to perform a pressure test on the side wall of the pipeline. After the test is completed and the pressure is released, the front and rear top plates release the pipeline, and the pressure test of the pipeline is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0015] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0016] Figure 3 It is a side view structural schematic diagram of the present invention.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the front fixing mechanism.

[0018] Figure 5 It is a schematic diagram of the top view of the front fixing mechanism.

[0019] Figure 6 It is a schematic diagram of the structure of the front fixing mechanism on the rear fixing mechanism side.

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the front top plate.

[0021] Figure 8 It is a schematic diagram of the front structure of the front top plate.

[0022] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rear fixing mechanism.

[0023] Fig.10 It is a schematic diagram of the top view of the rear fixing mechanism.

[0024] Fig.11 It is a schematic diagram of the structure where the rear fixing mechanism side is on the front fixing mechanism side.

[0025] The text labels in the figure are as follows: 1. test frame; 101. track; 2. front fixing mechanism; 201. front bracket; 202. front top plate; 203. water injection hole; 204. exhaust hole; 205. water injection pipe; 206. exhaust pipe; 207. control valve; 208. front pushing mechanism; 209. water injection channel; 210. channel; 3. rear fixing mechanism; 301. rear bracket; 302. rear top plate; 303. rear pushing mechanism; 4. sealing gasket; 5. upper clamping plate; 6. lower clamping plate; 7. connecting rod; 8. linear drive device; 9. pad. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0027] Embodiment 1, as Figure 1-Figure 11 As shown, the specific structure of this embodiment is: a pipeline pressure testing machine, which includes a test frame 1, on which a front fixing mechanism 2 and a rear fixing mechanism 3 are relatively arranged along its length direction. In this embodiment, the upper end of the test frame 1 is inclined downward on the side of the rear fixing mechanism 3, and a track 101 is arranged on the upper end of the test frame 1 along its length direction.

[0028] The front fixing mechanism 2 includes a front bracket 201, on which a front top plate 202 that moves along the length direction of the test frame 1 is arranged. In order to push the front top plate 202 to move, a front pushing mechanism 208 is arranged on the front bracket 201. The front top plate 202 is provided with a water injection hole 203 and an exhaust hole 204 on the side of the rear fixing mechanism 3. The water injection hole 203 is connected to a water injection pipe 205 through a water injection channel 209 in the front top plate 202. One end of the water injection pipe 205 is arranged on the side wall of the front top plate 202, and the other end of the water injection pipe 205 is connected to a water pump through a water pipe, and a telescopic section is arranged on the water pipe.

[0029] The exhaust hole 204 is connected to the exhaust pipe 206 through the channel 210 in the front top plate 202. One end of the exhaust pipe 206 is arranged on the side wall of the front top plate 202. The other end of the exhaust pipe 206 is connected to the pressure testing mechanism and the discharge valve through a connecting pipe. The discharge valve can adopt an air valve, and the pressure testing mechanism can adopt a pressure gauge or other instruments in the prior art that can detect water pressure.

[0030] The rear fixing mechanism 3 includes a rear bracket 301, which slides on the track 101. For this purpose, a rack can be installed on the test frame 1, and an adjustment motor can be installed on the rear bracket 301. A gear meshing with the rack can be installed on the output shaft of the adjustment motor; or a linear module, a cylinder or other driving mechanism can be installed on the test frame 1. The rear bracket 301 is provided with a rear top plate 302 that moves along the length direction of the test frame 1. In order to push the rear top plate 302 to move, a rear pushing mechanism 303 is provided on the rear bracket 301. The front pushing mechanism 208 and the rear pushing mechanism 303 can be hydraulic cylinders. The front top plate 202 and the rear top plate 302 are provided with sealing pads 4 on the opposite sides. The sealing pads 4 can be made of soft rubber materials such as rubber.

[0031] The front bracket 201 is provided with a pipe clamping mechanism on the side of the rear fixing mechanism 3 and the rear bracket 301 is provided with a pipe clamping mechanism on the side of the front fixing mechanism 2. The pipe clamping mechanism includes an upper clamping plate 5 and a lower clamping plate 6 which are arranged opposite to each other in the upper and lower directions. The distance between the upper clamping plate 5 and the lower clamping plate 6 is adjusted along the radial direction of the pipeline to be tested. For this purpose, a cylinder, an oil cylinder or other pushing mechanism for pushing the upper clamping plate 5 and the lower clamping plate 6 to move can be installed on the front bracket 201 and the rear bracket 301 respectively. The upper clamping plate 5 and the lower clamping plate 6 are provided with arc grooves, and the center of the arc grooves on the upper and lower clamping plates faces the other clamping plate.

[0032] In this embodiment, the lower clamping plate 6 is mounted on the front bracket 201 and the rear bracket 301 by bolts, etc., the upper clamping plate 5 is rotatably connected to one end of the connecting rod 7 by a pin, the middle part of the connecting rod 7 is rotatably connected to the front bracket 201 or the rear bracket 301, and the other end of the connecting rod 7 is rotatably connected to the piston rod of the linear drive device 8. The linear drive device 8 can be a hydraulic cylinder, an electric push rod, etc., and the cylinder body of the linear drive device 8 is rotatably mounted on the front bracket 201 and the rear bracket 301. The lower clamping plate 6 or the upper clamping plate 5 is provided with a cushion block 9. In this embodiment, the cushion block 9 is mounted on the upper end of the lower clamping plate 6 by bolts. According to the diameter of the pipeline, the cushion block 9 or the upper and lower clamping plates can be replaced.

[0033] Specific test process: the distance between the front fixing mechanism 2 and the rear fixing mechanism 3 is adjusted in advance according to the length of the pipeline, and then the staff uses a crane to hoist the pipeline onto the pads 9 of the front and rear fixing mechanisms; then, the front top plate 202 and the rear top plate 302 are moved toward the pipeline so that the sealing gaskets 4 on the front top plate 202 and the rear top plate 302 are tightly fitted with the front and rear end surfaces of the pipeline to block the pipeline. At this time, the water injection hole 203 and the exhaust hole 204 are both located on the inside of the pipeline. When the pipeline is blocked, the upper clamping plate 5 rotates to press the pipeline from top to bottom, thereby fixing the pipeline on the front fixing mechanism 2 and the rear fixing mechanism 3.

[0034] After the above work is completed, water enters the pipeline from the water injection hole 203. At this time, the water is added at normal pressure. Since the pipeline is tilted along the test frame 1, the water first flows naturally to the side of the rear fixing mechanism 3. This flow process effectively pushes the air in the pipeline to the side of the front fixing mechanism 2; then, the air enters the exhaust pipe 206 along the exhaust hole 204, and is finally discharged into the outside air through the discharge valve. When the water is about to fill the pipeline, the air and water mixture begins to be discharged from the exhaust hole 204. With the continuous injection of water, the pressure testing mechanism begins to detect the water pressure in the connecting pipe. When the water pressure of the connecting pipe reaches the specified value, it means that the air in the pipeline has been basically eliminated. Next, high-pressure water replenishment is started in the pipeline. After the water replenishment is completed, the pressure maintenance operation is performed to start the pressure test of the pipeline. According to the specific requirements of the test, multiple stages of water replenishment and pressure maintenance actions can be performed throughout the process to achieve the required test pressure.

[0035] After the test is completed, the pressure is released, such as setting a water outlet on the rear top plate 302, and setting a valve at the water outlet. During the test, the water outlet is closed, and during the pressure release, the water outlet is opened; or the front top plate 202 and the rear top plate 302 are away from the pipeline, at which time water flows out from the rear fixing mechanism 3 of the pipeline. After the water flows out, the upper clamping plate 5 rotates upward to loosen the pipeline and open the path for the pipeline to move upward. Except for the pipeline placement process, the above actions can all be automated through the control program.

[0036] Embodiment 2, as Figure 7-8 As shown, the other structures and testing process of this embodiment are the same as those of embodiment 1, but in this embodiment, in order to adapt to pipelines of different directions, the exhaust holes 204 are provided in multiple numbers and are arranged at intervals along the radial direction of the front top plate 202. In order to remove the air in the pipeline as much as possible, the exhaust holes 204 are arranged above the water injection holes 203, and the exhaust holes 204 are arranged along the diameter of the front top plate 202 perpendicular to the horizontal plane. The exhaust pipe 206 corresponds to the exhaust holes 204 one by one, and the exhaust pipe 206 is provided with a control valve 207. Each channel 210 is independently provided and is not connected to each other. The water injection hole 203 is set at the center point of the front top plate 202. When testing the pipeline, the extension line of the center of the pipeline is collinear with the center of the water injection hole 203.

[0037] Specific test process: according to the size of the inner diameter of the pipeline, only open the control valve 207 on one exhaust pipe 206, which is connected to the exhaust hole 204 in the pipeline and closest to the inner wall of the pipeline, and close all other control valves 207. In this way, when performing a pressure test, it can be ensured that air and water can only flow out through the exhaust hole 204 at the top of the pipeline.

[0038] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A pipeline pressure tester, comprising a test frame (1), wherein a front fixing mechanism (2) and a rear fixing mechanism (3) are arranged on the test frame (1) in a direction opposite to each other along the length thereof, wherein the distance between the front fixing mechanism (2) and the rear fixing mechanism (3) is adjusted according to the length of the pipeline to be tested, and wherein: The front fixing mechanism (2) comprises a front bracket (201), the front bracket (201) is provided with a front top plate (202) that moves along the length direction of the test frame (1), the front top plate (202) is provided with a water injection hole (203) and an exhaust hole (204) on the side of the rear fixing mechanism (3), the water injection hole (203) is connected to a water injection pipe (205), the exhaust hole (204) is connected to an exhaust pipe (206), the exhaust pipe (206) is connected to a pressure testing mechanism and a discharge valve through a connecting pipe, and a pipe clamping mechanism is provided on the front bracket (201) on the side of the rear fixing mechanism (3); the rear fixing mechanism (3) comprises a rear bracket (301), the rear bracket (301) is provided with a rear top plate (302) that moves along the length direction of the test frame (1), and the rear bracket (301) is provided with a pipe clamping mechanism on the side of the front fixing mechanism (2).

2. A pipeline pressure testing machine according to claim 1, characterized in that: The test stand (1) is provided with a track (101), and the rear support (301) slides on the track (101).

3. A pipeline pressure testing machine according to claim 1, characterized in that: An angle is provided between a line connecting the front fixing mechanism (2) and the rear fixing mechanism (3) and a horizontal line.

4. A pipeline pressure testing machine according to claim 1, characterized in that: Sealing pads (4) are provided on opposite sides of the front top plate (202) and the rear top plate (302).

5. A pipeline pressure testing machine according to claim 1, characterized in that: The pipe clamping mechanism comprises an upper clamping plate (5) and a lower clamping plate (6) which are arranged opposite to each other up and down, and the distance between the upper clamping plate (5) and the lower clamping plate (6) is adjusted along the radial direction of the pipe to be tested.

6. A pipeline pressure testing machine according to claim 5, characterized in that: The lower clamping plate (6) is fixedly arranged, the upper clamping plate (5) is connected to one end of a connecting rod (7) via a pin shaft, the middle portion of the connecting rod (7) is rotatably connected to the front bracket (201) or the rear bracket (301), the other end of the connecting rod (7) is rotatably connected to the piston rod of a linear drive device (8), and the cylinder body of the linear drive device (8) is rotatably mounted on the front bracket (201) or the rear bracket (301).

7. A pipeline pressure testing machine according to claim 5, characterized in that: A cushion block (9) is provided on the lower clamping plate (6) or the upper clamping plate (5).

8. The pipeline pressure testing machine according to claim 1, characterized in that: The exhaust holes (204) are arranged at intervals along the radial direction of the front top plate (202), the exhaust pipes (206) correspond to the exhaust holes (204) one by one, and the exhaust pipes (206) are provided with control valves (207).

9. A pipeline pressure testing machine according to claim 8, characterized in that: The exhaust holes (204) are arranged above the water injection holes (203), and the exhaust holes (204) are arranged along the diameter of the front top plate (202) perpendicular to the horizontal plane.

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