A water supply and drainage pipe pressure testing machine

Abstract

The utility model discloses a water supply and drainage pipe pressure tester, which relates to the technical field of pipe pressure test, and comprises a workbench for placing pipes, a placement cavity is arranged inside the workbench, a placement groove for placing pipes is arranged on the upper surface of the workbench, a two-way displacement mechanism and a clamping unit for fixing the pipes are fixedly installed in the placement groove, and a sealing unit for fixing and sealing the two ends of the pipes is fixedly installed on the two-way displacement mechanism. The beneficial effect is that the two ends of the pipes are sealed by a sealing air cushion, and the sealing air cushion can be effectively fitted according to the shape of the end face of the pipe to improve the sealing effect. As the pressure in the pipe increases, the air in the expanded airbag is pressurized into the sealing air cushion, which increases the fitting force between the sealing air cushion and the pipe, so that the sealing air cushion can better seal the pipe, improve the sealing effect, effectively prevent leakage during the pipe pressure test, and ensure the accuracy of the test results.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pressure testing, in particular to a water supply and drainage pipe pressure testing machine. Background Art

[0002] Pressure testers are widely used in the sealing test of various pipelines and equipment. They mainly test the sealing performance of the pipeline system under a specified pressure by pressurizing. Traditional pressure testers are usually composed of a fixed pressure source, a pressure sensor, a sealing device, etc. They are easy to operate and have been widely used in pressure testing of pipelines, valves and other equipment. The core task of the pressure tester is to ensure the sealing of the pipeline and prevent leakage and damage by simulating the pressure conditions of the pipeline in actual use.

[0003] After searching, the patent application with Chinese patent publication number CN111351648A discloses a water supply and drainage pipe pressure testing machine, which mainly clamps the pipe through a lifting device and a positioning fixture, seals both ends of the pipe through a sealing device, and injects water through a conveying system, thereby performing fully automatic pressure testing.

[0004] By comparing with the existing technologies in the related fields, it can be seen that during the test process, as the pressure in the pipeline increases, the sealing effect at both ends of the pipeline will be affected, which can easily cause water leakage at both ends of the pipeline, resulting in deviations in the test results of the pipeline. Utility Model Content

[0005] The purpose of the utility model is to provide a water supply and drainage pipe pressure testing machine in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A water supply and drainage pipe pressure testing machine, comprising a workbench for placing pipes, a placement cavity is arranged inside the workbench, a placement groove for placing pipes is arranged on the upper surface of the workbench, a two-way displacement mechanism and a clamping unit for fixing the pipes are fixedly installed in the placement groove, a sealing unit for fixing and sealing both ends of the pipes is fixedly installed on the two-way displacement mechanism, the sealing unit is driven by the two-way displacement mechanism to seal both ends of the pressure test pipe to avoid leakage during the pipe pressure test, an infusion unit for pressurizing the inside of the pipe is fixedly installed in the placement cavity, and the infusion unit is connected to the pipe through the sealing unit;

[0008] The sealing unit on the two-way displacement mechanism includes a mounting seat, which is fixedly mounted on movable parts at both ends of the two-way displacement mechanism, a retaining ring and a liquid inlet pipe are fixedly mounted on opposite sides of the two mounting seats, the liquid inlet pipe is located at the center of the retaining ring, the liquid inlet pipe is connected to the infusion unit, a sealing air cushion is slidably mounted in the retaining ring, a fixing groove for placing the pipeline is provided on the sealing air cushion, an expansion air bag is fixedly connected to the sealing air cushion, the interiors of the sealing air cushion and the expansion air bag are connected, a mounting hole is formed at the center of the sealing air cushion and the expansion air bag, the sealing air cushion and the expansion air bag are slidably connected to the liquid inlet pipe through the mounting hole, the two ends of the pipeline are placed in the fixing groove, the sealing air cushion fits on the port of the pipeline to improve the sealing effect, the expansion air bag is located in the pipeline, during the test, when the pressure in the pipeline increases, the expansion air bag is compressed, and the air in the expansion air bag enters the sealing air cushion, thereby increasing the fitting force between the sealing air cushion and the pipeline, so that the sealing air cushion can better seal the pipeline and prevent leakage during the pipeline pressure test.

[0009] Furthermore, a mounting plate is fixedly mounted on the end of the liquid inlet pipe away from the mounting seat, and a hydraulic sensor for detecting the internal pressure of the pipeline is fixedly mounted on the mounting plate. During the pipeline pressure test, the pressure inside the test pipeline is detected by the hydraulic sensor.

[0010] Furthermore, the infusion unit in the placement cavity includes a water pump and a liquid storage tank. The water pump and the liquid storage tank are fixedly installed in the placement cavity. The water pump is located on both sides of the liquid storage tank. The liquid inlet end of the water pump is connected to the liquid storage tank. The liquid outlet end of the water pump is fixedly connected with a one-way valve. There are two one-way valves and they are respectively installed on two mounting seats. The discharge end of the one-way valve is connected to the liquid inlet pipe. After the pipeline is fixed, the water in the liquid storage tank is pumped out by the water pump, and transported to the pipeline through the one-way valve and the liquid inlet pipe, thereby increasing the pressure in the pipeline and testing the pipeline.

[0011] Furthermore, the clamping unit in the placement groove includes a hydraulic telescopic mechanism, which is fixedly installed on both sides of the workbench. A limit plate for clamping the pipeline is fixedly installed on the telescopic end of the hydraulic telescopic mechanism. The limit plate is slidably connected in the placement groove. The limit plate is located between two mounting seats. After the pressure test pipeline is placed in the placement groove, the limit plate is driven by the hydraulic telescopic mechanism to clamp and fix the pressure test pipeline to prevent the pressure test pipeline from moving, thereby improving the stability and firmness of the pressure test pipeline.

[0012] Furthermore, an anti-skid pad for improving the stability of the pipeline is installed on the limit plate. When the limit plate clamps and fixes the pressure test pipeline, the anti-skid pad improves the anti-skid property of the limit plate, so that the limit plate can better fix the pressure test pipeline, and the anti-skid pad prevents the limit plate from causing damage to the pressure test pipeline when fixing the pressure test pipeline.

[0013] Furthermore, a protective cover for isolating the pipeline is rotatably installed on one side of the upper surface of the workbench. During the pipeline pressure test, the pipeline under pressure test is shielded by the protective cover, and the staff is protected to avoid the danger of pipeline bursting during the test.

[0014] Furthermore, a reflux hole and a liquid collecting box for diverting the liquid flow in the placement tank are provided on the side of the workbench. The reflux hole is connected to the inner upper end of the liquid storage tank through the liquid collecting box. After the pipeline pressure test is completed, the water in the pipeline is directly discharged into the placement tank, and then guided back to the liquid storage tank through the reflux hole and the liquid collecting box, thereby reducing the waste of water resources during the pipeline pressure test.

[0015] The beneficial effects compared with the prior art are as follows:

[0016] 1. The mounting seat seals both ends of the pipeline through the sealing air cushion. The sealing air cushion can effectively fit according to the shape of the pipeline end face to improve the sealing effect. As the pressure in the pipeline increases, the air in the expanded airbag is pressed into the sealing air cushion, increasing the fit between the sealing air cushion and the pipeline, so that the sealing air cushion can better seal the pipeline, improve the sealing effect, effectively prevent leakage during the pipeline pressure test, and ensure the accuracy of the test results.

[0017] 2. During the pipeline pressure test, the protective cover shields the pipeline under pressure test and protects the staff to avoid danger caused by pipeline rupture during the test and improve the safety of the pipeline pressure test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the first axis side structure of a water supply and drainage pipe pressure testing machine described in the utility model;

[0020] Figure 2 The utility model is a water supply and drainage pipe pressure testing machine Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 3 It is a front view cross-sectional structural schematic diagram of a water supply and drainage pipe pressure testing machine described in the utility model;

[0022] Figure 4 The utility model is a water supply and drainage pipe pressure testing machine Figure 3 The enlarged structural diagram at B in the middle;

[0023] Figure 5 The utility model is a water supply and drainage pipe pressure testing machine Figure 3 The enlarged structural diagram at C in the middle;

[0024] Figure 6 It is a schematic diagram of the connection structure of the sealing air cushion and the expansion air bag of a water supply and drainage pipe pressure testing machine described in the utility model;

[0025] Figure 7 It is a schematic diagram of the second axis side structure of a water supply and drainage pipe pressure testing machine described in the utility model;

[0026] Figure 8 The utility model is a schematic diagram of a side cross-sectional structure of a water supply and drainage pipe pressure testing machine.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Workbench; 2. Protective cover; 301. Mounting seat; 302. Retaining ring; 303. Sealing air cushion; 304. Inflatable airbag; 305. Fixing groove; 306. Liquid inlet pipe; 307. Mounting hole; 401. Water pump; 402. Liquid storage tank; 403. One-way valve; 5. Two-way displacement mechanism; 6. Hydraulic telescopic mechanism; 7. Limiting plate; 8. Anti-slip mat; 9. Mounting plate; 10. Hydraulic sensor; 11. Reflux hole; 12. Liquid collecting box; 13. Placement cavity; 14. Placement groove. DETAILED DESCRIPTION

[0029] like Figure 1-Figure 8 As shown, a water supply and drainage pipe pressure testing machine comprises a workbench 1 for placing pipes, a placing cavity 13 is arranged inside the workbench 1, a placing groove 14 for placing pipes is arranged on the upper surface of the workbench 1, a two-way displacement mechanism 5 and a clamping unit for fixing the pipes are fixedly installed in the placing groove 14, a sealing unit for fixing and sealing both ends of the pipes is fixedly installed on the two-way displacement mechanism 5, an infusion unit for pressurizing the inside of the pipes is fixedly installed in the placing cavity 13, the infusion unit is connected to the pipes through the sealing unit, the two-way displacement mechanism 5 adopts the existing technology, and the movable parts on the two-way displacement mechanism 5 can move in the same direction or in the opposite direction at the same time, when testing the pipes, the pipes are placed in the placing groove 14 on the workbench 1, and the sealing unit is driven by the two-way displacement mechanism 5 to support and seal both ends of the pressure test pipes to avoid leakage of the pressure test pipes, the pipes are clamped and fixed by the clamping unit to improve the stability and firmness of the pipes to avoid movement during the pipe testing process, and after the pipes are fixed and sealed, the infusion unit transmits water into the pipes through the sealing unit to increase the pressure in the pipes, thereby performing a pressure test on the pipes;

[0030] like Figure 2 , Figure 4, Figure 6 , Figure 8 As shown, the sealing unit on the bidirectional displacement mechanism 5 includes a mounting seat 301, which is fixedly mounted on the movable parts at both ends of the bidirectional displacement mechanism 5, and a retaining ring 302 and a liquid inlet pipe 306 are fixedly mounted on the opposite sides of the two mounting seats 301. The liquid inlet pipe 306 is located at the center of the retaining ring 302, and the liquid inlet pipe 306 is connected to the infusion unit. A sealing air cushion 303 is slidably mounted in the retaining ring 302, and a fixing groove 305 for placing a pipeline is provided on the sealing air cushion 303. The sealing air cushion 303 is fixedly connected to an expansion air bag 303. 04, the interior of the sealing air cushion 303 and the expansion air bag 304 are connected, and a mounting hole 307 is formed at the center of the sealing air cushion 303 and the expansion air bag 304. The sealing air cushion 303 and the expansion air bag 304 are slidably connected to the liquid inlet pipe 306 through the mounting hole 307. The sealing air cushion 303 and the expansion air bag 304 are filled with gas. The sealing air cushion 303 and the expansion air bag 304 are installed in the retaining ring 302, and the pipeline is placed between the two mounting seats 301. The mounting seat 301 is driven to move by the two-way displacement mechanism 5 to adjust the two mounting seats. The mounting seat 301 drives the sealing air cushion 303 to move, so that the two ends of the pipeline enter the fixing groove 305, and the pipeline will squeeze the sealing air cushion 303. The sealing air cushion 303 will fit on the end of the pipeline, the inner and outer sides of the pipeline, the liquid inlet pipe 306, the mounting seat 301 and the retaining ring 302, thereby improving the sealing effect of the sealing air cushion 303. The retaining ring 302 limits the position of the pipeline and the sealing air cushion 303. At this time, the expansion airbag 304 is located in the pipeline. During the pipeline pressure test, as the pipeline As the pressure inside increases, the expansion airbag 304 is compressed by the force, and the air in the expansion airbag 304 enters the sealing air cushion 303. At the same time, the expansion airbag 304 fits on the liquid inlet pipe 306. After the gas in the sealing air cushion 303 increases, the sealing air cushion 303 fits more tightly on the pipeline and the liquid inlet pipe 306, increasing the fitting force between the sealing air cushion 303 and the pipeline, so that the sealing air cushion 303 can better seal the pipeline, improve the sealing effect, effectively prevent leakage during the pipeline pressure test, and ensure the accuracy of the test results.

[0031] like Figure 2 As shown, a mounting plate 9 is fixedly mounted on the end of the liquid inlet pipe 306 away from the mounting seat 301, and a hydraulic sensor 10 for detecting the internal pressure of the pipeline is fixedly mounted on the mounting plate 9. The liquid inlet pipe 306 drives the hydraulic sensor 10 into the pipeline through the mounting plate 9. During the pipeline pressure test, the pressure inside the test pipeline is detected by the hydraulic sensor 10, so that the staff can understand the pressure inside the pipeline.

[0032] like Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown, the infusion unit in the placement cavity 13 includes a water pump 401 and a liquid storage tank 402. The water pump 401 and the liquid storage tank 402 are both fixedly installed in the placement cavity 13. The water pump 401 is located on both sides of the liquid storage tank 402. The liquid inlet end of the water pump 401 is connected to the liquid storage tank 402. The liquid outlet end of the water pump 401 is fixedly connected with a one-way valve 403. There are two one-way valves 403 and they are respectively installed on two mounting seats 301. The discharge end of the one-way valve 403 is connected to the liquid inlet pipe 306. After the pipeline is fixed, the water in the liquid storage tank 402 is pumped out by the water pump 401, and is transported to the liquid inlet pipe 306 through the one-way valve 403. The water is then transported to the pipeline through the liquid inlet pipe 306 to increase the pressure in the pipeline and complete the pipeline test. The one-way valve 403 is used to prevent the water in the liquid inlet pipe 306 from flowing backward, so that the water pump 401 can be protected.

[0033] like Figure 1-Figure 3 , Figure 7 , Figure 8 As shown, the clamping unit in the placement groove 14 includes a hydraulic telescopic mechanism 6, which is fixedly installed on both sides of the workbench 1, and a limit plate 7 for clamping the pipeline is fixedly installed on the telescopic end of the hydraulic telescopic mechanism 6. The limit plate 7 is slidably connected in the placement groove 14, and the limit plate 7 is located between the two mounting seats 301. After the pressure test pipeline is placed in the placement groove 14, the pipeline is located between the limit plates 7, and the limit plate 7 is driven by the hydraulic telescopic mechanism 6 to move, and the pressure test pipeline is clamped and fixed by the limit plate 7 to prevent the pressure test pipeline from moving during the test process, thereby improving the stability of the pressure test pipeline.

[0034] like Figure 2 As shown, an anti-skid pad 8 for improving the stability of the pipeline is installed on the limit plate 7. When the limit plate 7 clamps and fixes the pressure test pipeline, the anti-skid property of the limit plate 7 is improved by the anti-skid pad 8. The limit plate 7 clamps and fixes the pipeline by the anti-skid pad 8. The limit plate 7 can better fix the pressure test pipeline by the anti-skid pad 8, and the limit plate 7 and the pressure test pipeline are in flexible contact by the anti-skid pad 8, so as to avoid damage to the pressure test pipeline when the limit plate 7 fixes the pressure test pipeline.

[0035] like Figure 1 , Figure 3 , Figure 7 , Figure 8 As shown, a protective cover 2 for isolating the pipeline is rotatably installed on one side of the upper surface of the workbench 1. After the pipeline to be pressure tested is placed on the workbench 1, the protective cover 2 is covered on the workbench 1 and fixed on the workbench 1. The pipeline to be pressure tested is shielded by the protective cover 2, and the staff is protected to avoid danger caused by pipeline rupture during the test, thereby improving the safety during the pipeline pressure test.

[0036] like Figure 5 , Figure 7 As shown, the side of the workbench 1 is provided with a reflux hole 11 and a liquid collecting box 12 for guiding the liquid flow in the placement groove 14. The reflux hole 11 is connected to the inner upper end of the liquid storage tank 402 through the liquid collecting box 12. After the pipeline pressure test is completed or the pipeline cannot bear the pressure and bursts, the water in the pipeline is discharged into the placement groove 14, and the water in the placement groove 14 enters the liquid collecting box 12 through the reflux hole 11, and is guided back to the liquid storage tank 402 through the liquid collecting box 12, so that the pressure test water is recycled and the waste of water resources during the pipeline pressure test is reduced.

[0037] Working principle: When the pipeline is pressure tested, Figure 1-Figure 6 , Figure 8 As shown, the sealing air cushion 303 and the expansion air bag 304 are installed in the retaining ring 302, and the pipeline to be tested is placed between the two mounting seats 301. The mounting seat 301 is driven to move by the two-way displacement mechanism 5, and the distance between the two mounting seats 301 is adjusted. The mounting seat 301 drives the sealing air cushion 303 to move, so that the two ends of the pipeline enter the fixing groove 305 respectively, and the pipeline will squeeze the sealing air cushion 303. The sealing air cushion 303 is attached to the pipeline, the liquid inlet pipe 306, the mounting seat 301 and the retaining ring 302 for sealing. The two ends of the pipeline are sealed by the sealing air cushion 303, and the pipeline and the sealing air cushion 303 are supported and limited by the retaining ring 302. The two mounting seats 301 support the two ends of the pressure test pipeline through the sealing air cushion 303 and the retaining ring 302. At this time, the expansion air bag 304 and the hydraulic sensor 10 are located in the pipeline.

[0038] After the support of both ends of the pipe is completed, Figure 1-Figure 3 , Figure 7 , Figure 8 As shown, the limit plate 7 is driven to move by the hydraulic telescopic mechanism 6, and the limit plate 7 clamps and fixes the pressure test pipe through the anti-slip pad 8 to prevent the pipe from moving during the test and improve the stability of the pipe. The protective cover 2 is covered on the workbench 1 and fixed on the workbench 1;

[0039] After the pipe is fixed and sealed, Figure 1-Figure 4 , Figure 7 , Figure 8 As shown, water in the liquid storage tank 402 is pumped out by a water pump 401, and is transported to the liquid inlet pipe 306 through a one-way valve 403, and then the water is transported to the pipeline through the liquid inlet pipe 306 to increase the internal pressure of the pipeline, and test the bearing capacity of the fixed pipeline under different pressures. During the pipeline pressure test, the pressure inside the test pipeline is detected by the hydraulic sensor 10, so that the staff can understand the pressure inside the pipeline;

[0040] like Figure 1 , Figure 3 , Figure 5, Figure 7 , Figure 8 As shown, after the pipeline test is completed, the two-way displacement mechanism 5 drives the mounting seat 301 to move in the opposite direction, releasing the seals on both ends of the pipeline, and the water in the pipeline enters the placement groove 14. The water in the placement groove 14 enters the liquid collecting box 12 through the reflux hole 11, and is guided back to the liquid storage tank 402 through the liquid collecting box 12 for recycling.

[0041] like Figure 1 , Figure 3 , Figure 7 , Figure 8 As shown, when a pipeline bursts during the pressure test, the protective cover 2 blocks the splashing water and debris to improve safety, and the water directly falls into the placement tank 14 for recycling.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A water supply and drainage pipe pressure testing machine, characterized in that: The invention comprises a workbench (1) for placing a pipeline, wherein a placement cavity (13) is arranged inside the workbench (1), and a placement groove (14) for placing the pipeline is arranged on the upper surface of the workbench (1), a bidirectional displacement mechanism (5) and a clamping unit for fixing the pipeline are fixedly installed in the placement groove (14), a sealing unit for fixing and sealing both ends of the pipeline is fixedly installed on the bidirectional displacement mechanism (5), an infusion unit for pressurizing the inside of the pipeline is fixedly installed in the placement cavity (13), and the infusion unit is connected to the pipeline through the sealing unit; The sealing unit on the bidirectional displacement mechanism (5) comprises a mounting seat (301), the mounting seat (301) being fixedly mounted on movable components at both ends of the bidirectional displacement mechanism (5), a retaining ring (302) and a liquid inlet pipe (306) being fixedly mounted on opposite sides of the two mounting seats (301), the liquid inlet pipe (306) being located at the center of the retaining ring (302), the liquid inlet pipe (306) being connected to the infusion unit, and a sealing air cushion (303) being slidably mounted in the retaining ring (302). The sealing air cushion (303) is provided with a fixing groove (305) for placing a pipeline, the sealing air cushion (303) is fixedly connected to an expansion air bag (304), the sealing air cushion (303) and the expansion air bag (304) are internally connected, a mounting hole (307) is formed at the center position of the sealing air cushion (303) and the expansion air bag (304), and the sealing air cushion (303) and the expansion air bag (304) are slidably connected to the liquid inlet pipe (306) through the mounting hole (307).

2. A water supply and drainage pipe pressure testing machine according to claim 1, characterized in that: A mounting plate (9) is fixedly mounted on the end of the liquid inlet pipe (306) away from the mounting seat (301), and a hydraulic sensor (10) for detecting the internal pressure of the pipeline is fixedly mounted on the mounting plate (9).

3. A water supply and drainage pipe pressure testing machine according to claim 1, characterized in that: The infusion unit in the placement cavity (13) comprises a water pump (401) and a liquid storage tank (402). The water pump (401) and the liquid storage tank (402) are both fixedly mounted in the placement cavity (13). The water pump (401) is located on both sides of the liquid storage tank (402). The liquid inlet end of the water pump (401) is connected to the liquid storage tank (402). The liquid outlet end of the water pump (401) is fixedly connected to a one-way valve (403). There are two one-way valves (403) in total and they are respectively mounted on two mounting seats (301). The outlet end of the one-way valve (403) is connected to the liquid inlet pipe (306).

4. A water supply and drainage pipe pressure testing machine according to claim 1, characterized in that: The clamping unit in the placement groove (14) comprises a hydraulic telescopic mechanism (6), the hydraulic telescopic mechanism (6) being fixedly mounted on both sides of the workbench (1), a limit plate (7) for clamping the pipeline being fixedly mounted on the telescopic end of the hydraulic telescopic mechanism (6), the limit plate (7) being slidably connected in the placement groove (14), and the limit plate (7) being located between the two mounting seats (301).

5. A water supply and drainage pipe pressure testing machine according to claim 4, characterized in that: An anti-slip pad (8) for improving the stability of the pipeline is installed on the limiting plate (7).

6. A water supply and drainage pipe pressure testing machine according to claim 1, characterized in that: A protective cover (2) for isolating the pipeline is rotatably mounted on one side of the upper surface of the workbench (1).

7. A water supply and drainage pipe pressure testing machine according to claim 3, characterized in that: A reflux hole (11) and a liquid collecting box (12) for guiding the liquid flow in the placement groove (14) are arranged on the side of the workbench (1), and the reflux hole (11) is connected to the internal upper end of the liquid storage tank (402) through the liquid collecting box (12).

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