Large-diameter pipeline pressure testing machine

Abstract

The utility model relates to the technical field of pipeline detection, in particular to a large-diameter pipeline pressure testing machine. According to the technical scheme, the device comprises a base and a packed column, a control box and a connecting plate are fixed to the end of the base, a detection plate is installed on the inner side of the control box, an annular plate is fixed to the inner side of the connecting plate, a sleeve is fixed to the outer side of the connecting plate, and the packed column is slidably connected into the sleeve; the end, extending out of the sleeve, of the packed column penetrates through the connecting plate and the annular plate, a pressure sensor is fixed to the inner side of the detection plate, an air inlet hole and a pressure relief hole are formed in the detection plate, a one-way valve is installed in the air inlet hole, a pressure relief valve is installed in the pressure relief hole, and an inflation pump is fixed to the upper end of the control box. And an inflating pipe is fixed between the inflating pump and the air inlet. Before inflation detection is carried out in the pipeline, the packed column is inserted into the detected pipeline, so that the amount of gas for inflation detection can be reduced, the inflation time and the exhaust time are shortened, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to a large-caliber pipeline pressure testing machine. Background Art

[0002] Pipeline pressure testing machine is a special equipment used to test the pressure-bearing performance of pipelines and containers. It is usually used to perform static or dynamic pressure tests on various pipelines and containers to ensure their safety and reliability under normal working pressure.

[0003] During the detection process, the two ends of the pipeline are mainly sealed, and then gas or liquid is injected into the pipeline to keep it at a specified pressure for a certain period of time. If there is a pressure change or water leakage, the pipeline is an unqualified product. When using this method to detect large-diameter pipelines, in order to reach the specified air pressure in the pipeline, a large amount of gas often needs to be injected. At the same time, it takes more time to vent after the test, which will cause the experiment to take more time and reduce the detection efficiency. Utility Model Content

[0004] The utility model aims to provide a large-caliber pipeline pressure testing machine in view of the problems existing in the background technology.

[0005] The technical solution of the utility model: a large-diameter pipeline pressure testing machine, including a base and a filling column, a control box and a connecting plate are fixed to the end of the base, a detection plate is installed on the inner side of the control box, a ring plate is fixed on the inner side of the connecting plate, a sleeve is fixed on the outer side of the connecting plate, the filling column is slidably connected in the sleeve, one end of the filling column extends out of the sleeve and passes through the connecting plate and the ring plate, a pressure sensor is fixed on the inner side of the detection plate, an air inlet hole and a pressure relief hole are opened in the detection plate, a one-way valve is installed in the air inlet hole, a pressure relief valve is installed in the pressure relief hole, an air pump is fixed on the upper end of the control box, and an air pipe is fixed between the air pump and the air inlet hole.

[0006] Preferably, a telescopic cylinder is fixed between the control box and the detection plate, and a buffer pad is fixed at the middle position inside the detection plate.

[0007] Preferably, the middle position of the inflation tube is a corrugated structure, which can ensure that the inflation tube does not affect the telescopic drive of the detection plate.

[0008] Preferably, a threaded rod is rotatably connected in the sleeve, the threaded rod is threadedly connected in the filling column, a servo motor is fixed at the middle position of the outer side of the sleeve, and the output end of the servo motor is fixed to the end of the threaded rod.

[0009] Preferably, a pair of guide rods are fixed in the sleeve, and the guide rods are inserted into the filling column and are slidably connected to the filling column.

[0010] Preferably, a sealing gasket is fixed on the periphery of one side where the ring plate and the detection plate are close to each other, and an annular gasket is fixed on the inner side of the ring plate, and the inner diameter of the annular gasket is adapted to the size of the filling column.

[0011] Preferably, a support plate is installed above the base, a hydraulic cylinder is fixed between the base and the support plate, the upper end of the support plate is an arc structure, limiting rods are fixed at the four corners of the bottom of the support plate, and the bottom of the limiting rod is slidably connected in the base.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects: before performing inflation detection in a pipeline, a filling column is inserted into the pipeline to be detected, which can reduce the amount of gas for inflation detection, shorten the inflation and exhaust time, and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the front cutaway structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the combined structure of the filling column and the ring plate of the utility model;

[0015] Figure 3 This is a schematic diagram of the inner structure of the detection board of the utility model;

[0016] Figure 4 This is a schematic diagram of the appearance structure of the support plate of the utility model.

[0017] Figure numerals: 1. base; 2. control box; 21. telescopic cylinder; 3. connecting plate; 4. sleeve; 41. filling column; 42. threaded rod; 43. guide rod; 44. servo motor; 5. ring plate; 51. ring pad; 6. detection plate; 61. buffer pad; 62. pressure relief hole; 63. air inlet hole; 64. pressure sensor; 7. sealing pad; 8. air pump; 81. air filling tube; 9. support plate; 91. hydraulic cylinder; 92. limit rod. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example

[0020] like Figure 1-4As shown, a large-diameter pipeline pressure testing machine proposed by the utility model includes a base 1 and a filling column 41, a control box 2 and a connecting plate 3 are fixed at the end of the base 1, a detection plate 6 is installed on the inner side of the control box 2, a ring plate 5 is fixed on the inner side of the connecting plate 3, a sleeve 4 is fixed on the outer side of the connecting plate 3, a filling column 41 is slidably connected in the sleeve 4, one end of the filling column 41 extends out of the sleeve 4 and passes through the connecting plate 3 and the ring plate 5, a pressure sensor 64 is fixed on the inner side of the detection plate 6, an air inlet hole 63 and a pressure relief hole 62 are opened in the detection plate 6, and an air inlet hole 63 and a pressure relief hole 62 are opened in the detection plate 6. A one-way valve is installed in the air hole 63, a pressure relief valve is installed in the pressure relief hole 62, an air pump 8 is fixed to the upper end of the control box 2, and an air pipe 81 is fixed between the air pump 8 and the air inlet hole 63, a telescopic cylinder 21 is fixed between the control box 2 and the detection plate 6, a buffer pad 61 is fixed at the middle position on the inner side of the detection plate 6, the middle position of the air pipe 81 is a corrugated structure, a sealing pad 7 is fixed on the outer periphery of the side where the ring plate 5 and the detection plate 6 are close, and an annular pad 51 is fixed on the inner side of the ring plate 5, and the inner diameter of the annular pad 51 is adapted to the size of the filling column 41.

[0021] A threaded rod 42 is rotatably connected inside the sleeve 4, and the threaded rod 42 is threadedly connected inside the filling column 41. A servo motor 44 is fixed at the middle position outside the sleeve 4, and the output end of the servo motor 44 is fixed to the end of the threaded rod 42. A pair of guide rods 43 are fixed inside the sleeve 4, and the guide rods 43 are inserted into the filling column 41 and are slidably connected to the filling column 41.

[0022] A support plate 9 is installed above the base 1, and a hydraulic cylinder 91 is fixed between the base 1 and the support plate 9. The upper end of the support plate 9 is an arc structure, and limiting rods 92 are fixed at the four corners of the bottom of the support plate 9. The bottom of the limiting rod 92 is slidably connected in the base 1.

[0023] In this embodiment, the entire device is first connected to an external power supply, and then the large-diameter pipeline is placed on the support plate 9. The hydraulic cylinder 91 is used to lift the pipeline so that its position is aligned with the ring plate 5 and the detection plate 6. The telescopic cylinder 21 is then driven to squeeze and fix the end of the pipeline. The sealing pad 7 is used to ensure the sealing of both ends of the pipeline. The air pump 8 is then used to inflate. In this process, the sliding of the filling column 41 is used to make its end extend out of the ring plate 5 and insert into the pipeline. Therefore, when inflating, the cavity capacity in the pipeline is reduced, and the experimental required pressure can be reached in the pipeline without a large amount of gas. The pressure sensor 64 can be used to detect the change in air pressure. Finally, when the pressure is released, the filling column 41 is pulled out, and a large amount of time is also not required to exhaust the gas, thereby achieving the purpose of improving the detection efficiency. When the filling column 41 is telescopically driven, it is only necessary to use the servo motor 44 to drive the threaded rod 42 to rotate, and then use the guide rod 43 to limit the horizontal position of the filling column 41, so that the telescopic drive can be realized, and the operation is simple and convenient.

[0024] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A large-diameter pipeline pressure testing machine, comprising a base (1) and a filling column (41), characterized in that: A control box (2) and a connecting plate (3) are fixed to the end of the base (1); a detection plate (6) is installed inside the control box (2); a ring plate (5) is fixed inside the connecting plate (3); a sleeve (4) is fixed outside the connecting plate (3); the filling column (41) is slidably connected inside the sleeve (4); one end of the filling column (41) extends out of the sleeve (4) and passes through the connecting plate (3) and the ring plate (5); a pressure sensor (64) is fixed inside the detection plate (6); an air inlet (63) and a pressure relief hole (62) are provided inside the detection plate (6); a one-way valve is installed inside the air inlet (63); a pressure relief valve is installed inside the pressure relief hole (62); an air pump (8) is fixed on the upper end of the control box (2); and an air pipe (81) is fixed between the air pump (8) and the air inlet (63).

2. A large-diameter pipeline pressure testing machine according to claim 1, characterized in that: A telescopic cylinder (21) is fixed between the control box (2) and the detection plate (6), and a buffer pad (61) is fixed at the middle position inside the detection plate (6).

3. A large-diameter pipeline pressure testing machine according to claim 1, characterized in that: The middle position of the inflation tube (81) is a corrugated structure.

4. A large-diameter pipeline pressure testing machine according to claim 1, characterized in that: A threaded rod (42) is rotatably connected inside the sleeve (4), and the threaded rod (42) is threadedly connected inside the filling column (41). A servo motor (44) is fixed at a middle position outside the sleeve (4), and an output end of the servo motor (44) is fixed to the end of the threaded rod (42).

5. A large-diameter pipeline pressure testing machine according to claim 4, characterized in that: A pair of guide rods (43) are fixed in the sleeve (4), and the guide rods (43) are inserted into the filling column (41) and are slidably connected to the filling column (41).

6. A large-diameter pipeline pressure testing machine according to claim 1, characterized in that: A sealing gasket (7) is fixed on the periphery of one side of the ring plate (5) and the detection plate (6) that are close to each other, and an annular gasket (51) is fixed on the inner side of the ring plate (5), and the inner diameter of the annular gasket (51) is adapted to the size of the filling column (41).

7. A large-diameter pipeline pressure testing machine according to claim 1, characterized in that: A support plate (9) is installed above the base (1), a hydraulic cylinder (91) is fixed between the base (1) and the support plate (9), the upper end of the support plate (9) is an arc structure, and limiting rods (92) are fixed at the four corners of the bottom of the support plate (9), and the bottom of the limiting rod (92) is slidably connected in the base (1).

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