A pipe pressure testing machine

Abstract

The application 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 along the length direction of the testing frame, the front fixing mechanism comprises a front support, a front top plate is arranged on the front support and can move along the length direction of the testing frame, a water injection hole and an exhaust hole are arranged on the front top plate 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 a pipeline clamping mechanism is arranged on the front support at the side of the rear fixing mechanism; the rear fixing mechanism comprises a rear support, a rear top plate is arranged on the rear support and can move along the length direction of the testing frame, and a pipeline clamping mechanism is arranged on the rear support at the side of the front fixing mechanism. The pipeline pressure testing machine can be used for pressure testing of pipelines.

Description

Technical Field

[0001] This invention relates to the field of pipeline testing, specifically to a pipeline pressure testing machine. Background Technology

[0002] In the construction of water supply and drainage systems, pipelines are the core components for transmission, and their quality directly affects the efficiency and safety of the entire system. Since pipelines are subjected to considerable 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 purpose of this invention is to address the above problems by providing a pipeline pressure testing machine capable of performing pressure tests on pipelines.

[0004] To achieve the above objectives, the present invention provides a pipeline pressure testing machine, comprising a test frame. A front fixing mechanism and a rear fixing mechanism are arranged opposite each other along the length of the test frame, and the distance between the front and rear fixing mechanisms is adjusted according to the length of the pipeline to be tested. The front fixing mechanism includes a front support, on which a front top plate that moves along the length of the test frame is provided. The front top plate has a water injection hole and a vent hole on the side of the rear fixing mechanism. The water injection hole is connected to a water injection pipe, and the vent hole is connected to an vent pipe. The vent pipe is connected to a pressure testing mechanism and a discharge valve via a connecting pipe. A pipeline clamping mechanism is provided on the front support on the side of the rear fixing mechanism. The rear fixing mechanism includes a rear support, on which a rear top plate that moves along the length of the test frame is provided. The pipeline clamping mechanism is provided on the rear support 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 accommodate pipes of different lengths, a track is provided on the test frame, and the rear support slides on the track.

[0006] Furthermore, the line connecting the front fixing mechanism and the rear fixing mechanism is set at an angle to the horizontal line, so that the water in the pipe can be quickly discharged after the front and rear top plates are released from the pipe.

[0007] Furthermore, sealing gaskets are provided on opposite sides of the front and rear top plates to ensure the sealing of the pipe end face when the front and rear top plates press against the pipe end face.

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

[0009] Furthermore, in one opening and closing method of the pipe clamping mechanism, the lower clamping plate is fixedly installed, the upper clamping plate is connected to one end of the connecting rod via a pin, the middle part of the connecting rod is rotatably connected to the front or rear support, and the other end of the connecting rod is rotatably connected to the piston rod of the linear drive device. The cylinder of the linear drive device is rotatably mounted on the front or rear support.

[0010] Furthermore, pads are provided on the lower or upper clamping plate to improve usability.

[0011] Furthermore, to accommodate pipes of different diameters, the exhaust holes are arranged radially at intervals along the front top plate, with each exhaust pipe corresponding to one of the exhaust holes, and a control valve is installed on the exhaust pipe.

[0012] Furthermore, in order to expel as much air as possible from the pipe, the vent is located above the water injection hole, and the vents are arranged along the diameter of the front top plate perpendicular to the horizontal plane.

[0013] The beneficial effects of this invention are as follows: The pipe is hoisted onto the front and rear fixing mechanisms, and then the front and rear top plates move toward the pipe side to hold the pipe end face. The pipe clamping mechanism fixes the pipe in place. Then, water is injected into the pipe through the water injection hole. During this process, the air in the pipe is discharged through the vent hole. After the air is discharged, a high-pressure pump or similar device is used to replenish water and pressurize the pipe to conduct a pressure test on the pipe sidewall. After the test is completed and the pressure is released, the front and rear top plates release the pipe, thus completing the pressure test of the pipe. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

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

[0016] Figure 3 This is a side view of the structure of the present invention.

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

[0018] Figure 5 This is a top view of the front fixed mechanism.

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

[0020] Figure 7 This is a schematic diagram of the three-dimensional structure of the front roof panel.

[0021] Figure 8 This is a schematic diagram of the front structure of the roof panel.

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

[0023] Figure 10 This is a top view of the rear fixing mechanism.

[0024] Figure 11 This is a structural diagram of the rear fixing mechanism side compared to the front fixing mechanism side.

[0025] The text labels in the figure represent: 1. Test frame; 101. Track; 2. Front fixing mechanism; 201. Front support; 202. Front top plate; 203. Water injection hole; 204. Vent hole; 205. Water injection pipe; 206. Vent pipe; 207. Control valve; 208. Front pushing mechanism; 209. Water injection channel; 210. Channel; 3. Rear fixing mechanism; 301. Rear support; 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 block. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0027] Example 1, as Figures 1-11 As shown, the specific structure of this embodiment is as follows: a pipeline pressure testing machine, which includes a test frame 1. A front fixing mechanism 2 and a rear fixing mechanism 3 are arranged opposite to each other along the length direction of the test frame 1. 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 support 201. A front top plate 202 that moves along the length of the test frame 1 is provided on the front support 201. A front pushing mechanism 208 is provided on the front support 201 to push the front top plate 202 to move. A water injection hole 203 and an exhaust hole 204 are provided on the side of the rear fixing mechanism 3 of the front top plate 202. The water injection hole 203 is connected to the water injection pipe 205 through the water injection channel 209 in the front top plate 202. One end of the water injection pipe 205 is provided on the side wall of the front top plate 202, and the other end of the water injection pipe 205 is connected to the water pump through a water pipe. A telescopic section is provided on the water pipe.

[0029] The vent 204 is connected to the vent pipe 206 through the channel 210 in the front top plate 202. One end of the vent pipe 206 is located on the side wall of the front top plate 202, and the other end of the vent pipe 206 is connected to the pressure testing mechanism and the discharge valve through the connecting pipe. The discharge valve can be a gas valve, and the pressure testing mechanism can be an instrument that can detect water pressure, such as a pressure gauge.

[0030] The rear fixing mechanism 3 includes a rear support 301, which slides on the track 101. For this purpose, a rack can be installed on the test frame 1, and an adjusting motor can be installed on the rear support 301. A gear meshing with the rack can be installed on the output shaft of the adjusting motor. Alternatively, a linear module, hydraulic cylinder, or other drive mechanism can be installed on the test frame 1. A rear top plate 302 that moves along the length of the test frame 1 is provided on the rear support 301. To push the rear top plate 302, a rear pushing mechanism 303 is provided on the rear support 301. The front pushing mechanism 208 and the rear pushing mechanism 303 can be hydraulic cylinders, etc. Sealing gaskets 4 are provided on opposite sides of the front top plate 202 and the rear top plate 302. The sealing gaskets 4 can be made of soft rubber or other soft materials.

[0031] Both the front support 201 on the side of the rear fixing mechanism 3 and the rear support 301 on the side of the front fixing mechanism 2 are equipped with pipe clamping mechanisms. Each pipe clamping mechanism includes an upper clamping plate 5 and a lower clamping plate 6 arranged vertically opposite each other. The distance between the upper clamping plate 5 and the lower clamping plate 6 is adjusted radially along the pipe to be tested. For this purpose, cylinders, hydraulic cylinders, or other pushing mechanisms can be installed on the front support 201 and the rear support 301 respectively to move the upper clamping plate 5 and the lower clamping plate 6. Both the upper clamping plate 5 and the lower clamping plate 6 are provided with arc-shaped grooves, with the center of the arc-shaped grooves on the upper and lower clamping plates facing 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. A pad 9 is provided on the lower clamping plate 6 or the upper clamping plate 5. In this embodiment, the pad 9 is installed on the upper end of the lower clamping plate 6 by bolts. The pad 9 or the upper and lower clamping plates can be replaced according to the pipe diameter.

[0033] The specific testing process is as follows: First, adjust the distance between the front fixing mechanism 2 and the rear fixing mechanism 3 according to the length of the pipeline. Then, workers use a crane to hoist the pipeline onto the pads 9 of the front and rear fixing mechanisms. Next, the front top plate 202 and the rear top plate 302 move towards the pipeline so that the sealing gaskets 4 on the front top plate 202 and the rear top plate 302 are tightly fitted against the front and rear end faces of the pipeline to seal it. At this time, the water injection hole 203 and the vent hole 204 are both located inside the pipeline. When the pipeline is held in place, the upper clamping plate 5 rotates to press the pipeline down from above, thereby fixing the pipeline to the front fixing mechanism 2 and the rear fixing mechanism 3.

[0034] After the above work is completed, water enters the pipe through the water inlet 203. At this time, normal pressure water filling is used. Because the pipe is inclined along the test frame 1, the water first flows naturally to the rear fixing mechanism 3 side. This flow process effectively pushes the air in the pipe towards the front fixing mechanism 2 side. Subsequently, the air enters the exhaust pipe 206 through the exhaust port 204 and is finally discharged into the outside air through the discharge valve. When the pipe is almost full of water, the air-water mixture begins to be discharged from the exhaust port 204. As water continues to be injected, the pressure testing mechanism begins to detect the water pressure in the connecting pipe. When the water pressure in the connecting pipe reaches the specified value, it means that the air in the pipe has been basically eliminated. Next, high-pressure water replenishment begins in the pipe. After water replenishment is completed, a pressure holding operation is performed to begin the pressure test on the pipe. Depending on the specific test requirements, multiple stages of water replenishment and pressure holding can be performed throughout the process to achieve the required test pressure.

[0035] After the test is completed, pressure is released. If a water outlet is installed on the rear top plate 302, a valve must be installed at the outlet. During testing, the outlet is closed; during pressure release, the outlet opens. Alternatively, the front top plate 202 and the rear top plate 302 can be moved away from the pipe. In this case, water flows out from the rear fixing mechanism 3 side of the pipe. After the water flows out, the upper clamping plate 5 rotates upward to release the pipe and open the path for the pipe to move upward. Except for the pipe placement process, all of the above actions can be automated through a control program.

[0036] Example 2, as Figure 7-8 As shown, the other structures and testing processes in this embodiment are the same as in Embodiment 1. However, in this embodiment, to accommodate different types of pipes, multiple vent holes 204 are provided and arranged radially at intervals along the front top plate 202. To maximize the removal of air from the pipe, the vent holes 204 are positioned above the water injection holes 203, and the vent holes 204 are arranged along the diameter of the front top plate 202 perpendicular to the horizontal plane. Each vent pipe 206 corresponds to one vent hole 204, and each vent pipe 206 is equipped with a control valve 207. Each channel 210 is independently configured and not interconnected. The water injection hole 203 is located at the center point of the front top plate 202. During pipe testing, the extended line of the pipe's center is collinear with the center of the water injection hole 203.

[0037] Specific testing procedure: Based on the inner diameter of the pipe, only one control valve 207 on the exhaust pipe 206 is opened. This exhaust pipe 206 is connected to the exhaust port 204 inside the pipe and closest to the inner wall of the pipe, while all other control valves 207 are closed. In this way, during pressure testing, it can be ensured that air and water can only flow out through the exhaust port 204 at the top of the pipe.

[0038] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or 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 for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A pipeline pressure testing machine, comprising a test frame (1), wherein a front fixing mechanism (2) and a rear fixing mechanism (3) are arranged opposite to each other along the length of the test frame (1), the distance between the front fixing mechanism (2) and the rear fixing mechanism (3) being adjusted according to the length of the pipeline to be tested, characterized in that, The front fixing mechanism (2) includes a front support (201), on which a front top plate (202) is provided that moves along the length of the test frame (1). The front top plate (202) has 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), and 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 via a connecting pipe. A pipe clamping mechanism is provided on the front support (201) on the side of the rear fixing mechanism (3). The rear fixing mechanism (3) includes a rear support (301), on which a pipe clamping mechanism is provided that moves along the length of the test frame (1). 1) The rear top plate (302) moves in the length direction. The rear bracket (301) is provided with a pipe clamping mechanism on the side of the front fixing mechanism (2). The exhaust holes (204) are arranged radially at intervals along the front top plate (202). The exhaust pipe (206) corresponds to the exhaust hole (204) one by one. The exhaust pipe (206) is provided with a control valve (207). The exhaust hole (204) is connected to the exhaust pipe (206) through the channel (210). Each channel (210) is set independently and is not connected to each other. During the test, only the control valve (207) on one exhaust pipe (206) is opened. The exhaust pipe (206) is connected to the exhaust hole (204) in the pipe and closest to the inner wall of the pipe. The other control valves (207) are closed.

2. A pipeline pressure testing machine according to claim 1, characterized in that, The test frame (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, The line connecting the front fixing mechanism (2) and the rear fixing mechanism (3) is set at an angle to the horizontal line.

4. A pipeline pressure testing machine according to claim 1, characterized in that, Sealing gaskets (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 includes an upper clamping plate (5) and a lower clamping plate (6) arranged opposite each other. 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 installed, and the upper clamping plate (5) is 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). The other end of the connecting rod (7) is rotatably connected to the piston rod of the linear drive device (8). The cylinder of the linear drive device (8) is rotatably mounted on the front bracket (201) and the rear bracket (301).

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

8. A pipeline pressure testing machine according to claim 1, characterized in that, The vent (204) is located above the water injection hole (203), and the vent (204) is arranged along the diameter of the front top plate (202) perpendicular to the horizontal plane.

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