Pipeline performance testing system based on water hammer tester

Abstract

The invention relates to a pipeline performance testing system based on a water hammer tester. Comprising a test board, a limiting mechanism arranged above the test board and used for limiting a pipeline, and communicating mechanisms arranged on the two sides of the limiting mechanism and used for connecting the two ends of the pipeline and used for water outlet and water return. The water supply mechanism is arranged on the side edge of the test board and communicated with the two communication mechanisms to form water circulation, and the detection mechanism is used for detecting the position of the pipeline. According to the pipeline performance testing system based on the water hammer tester, the outer end face of the pipeline makes contact with the sealing washer in the inner cavity of the circular truncated cone groove in the circumferential direction, and the sealing washer expands to seal a gap between the circular truncated cone groove and the pipeline under the action of thrust which is applied to the pipeline from the two sides to the middle at the same time by the sealing connecting sleeves; and the long and straight pipeline can be quickly fed, fixed and communicated, a good sealing effect is ensured during quick calibration and alignment, and the pipeline machining device is suitable for machining pipelines with various calibers.

Description

Technical Field

[0001] The invention relates to the technical field of water hammer testing of water supply pipelines, and in particular to a pipeline performance testing system based on a water hammer tester. Background Art

[0002] In the prior art, a water hammer test device is used to conduct water hammer test on long-distance water supply pipelines to obtain data such as vibration amplitude, vibration rate (axial and vertical), vibration frequency (axial and vertical), stress strain (mainly axial, radial, and circumferential), flow velocity in the pipe, stress wave of the pipeline, and water hammer wave.

[0003] According to the long-distance water supply pipeline water hammer test device described in patent number CN110131588A, the following problems exist when testing long straight pipelines:

[0004] (1) The length of the pipeline will make it impossible to accurately position and connect the pipes, making fixation difficult. In addition, during inspection, the final inspection results may be affected by loose external fixation or the possibility of leakage.

[0005] (2) It is impossible to perform compatibility tests on pipes of various diameters, and the scope of application is small. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a pipeline performance testing system based on a water hammer tester, which solves the above-mentioned problems.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pipeline performance testing system based on a water hammer tester, comprising a test bench, a limiting mechanism arranged above the test bench for limiting the position of the pipeline, a connecting mechanism arranged on both sides of the limiting mechanism for connecting the two ends of the pipeline for water outlet and water return, a water supply mechanism arranged on the side of the test bench and connected with the two connecting mechanisms to form a water circulation, and a detection mechanism for detecting the position of the pipeline, the two connecting mechanisms each comprising two sleeves respectively arranged at the two ends of the test bench, the inner cavity of the sleeve is slidably connected with a sealing connection sleeve driven to slide by a cylinder, the inner cavity of the sealing connection sleeve is provided with a truncated cone groove facing the pipeline, the inner cavity of the truncated cone groove is attached with a sealing gasket abutting against the surface of the pipeline, one side of the sealing connection sleeve is connected to a fixed pipeline, and the surface of the fixed pipeline is provided with a switch valve;

[0008] The water supply mechanism includes a water tank fixed on the side of the test bench and a circulation pump connected to the water tank, the circulation pump is connected to a fixed pipe for the water outlet connection mechanism through a water outlet pipe, one end of the water tank is connected to a fixed pipe for the water return connection mechanism through a return pipe, and the ends of the water outlet pipe and the return pipe are both provided with telescopic ends;

[0009] A driving cylinder is fixedly connected to the top of the test bench, and one end of the piston rod of the driving cylinder is connected to the sleeve of the water outlet communication mechanism;

[0010] The detection mechanism includes a lifting cylinder fixed above the sleeve of the return water connecting mechanism, one end of the lifting cylinder piston rod is fixedly connected to a semicircular bracket, the inner cavity of the semicircular bracket is fixedly connected to a movable frame, the inner cavity of the movable frame is slidably connected to a position probe whose end abuts against the surface of the pipeline, the surface of the position probe located between the semicircular bracket and the movable frame is fixedly connected to a limit ring, the surface of the position probe is sleeved with a reset spring whose two ends are respectively fixedly connected to the limit ring and the movable frame, and the position probe is connected to the external distance detection mechanism through a wire.

[0011] As a further solution of the present invention: a plurality of position probes are provided, and are evenly wrapped around the upper half of the pipeline on the movable frame. The position probes in the upper half are in contact with the surface of the pipeline. When the pipeline moves, the thrust of the reset spring can continuously push the position probes to be pressed against the surface of the pipeline. The distance detection of the offset of the pipeline in all directions can be effectively performed, and the obtained data is more accurate, which can effectively judge the displacement of the pipeline under the water hammer effect.

[0012] As a further solution of the present invention: the limiting mechanism includes a rotating cylinder fixed above the test bench and a guide frame slidably arranged on the test bench through a sliding track, one end of the rotating cylinder piston rod is fixedly connected to the guide frame, and the inner cavity of the guide frame is slidably connected to a placement seat for placing the pipeline.

[0013] As a further solution of the present invention: the top of the placement seat is provided with an inclined surface for receiving the pipeline, the middle part of the placement seat is rotatably connected with a guide wheel that abuts against the surface of the pipeline, and the surface of the guide wheel is provided with a central concave arc groove. Through the setting of the guide wheel, while the pipeline is placed left and right through the placement seat to limit the position, the guide wheel can smoothly move the pipeline forward and backward to adjust the position.

[0014] As a further solution of the present invention: the inner cavity of the guide frame is fixedly connected with a jacking spring, the top of the jacking spring is fixedly connected to the bottom of the placement seat, and the top of the guide frame is slidably connected with an upper pressure plate that is driven up and down by a cylinder. The bottom of the upper pressure plate is provided with a trapezoidal groove that abuts against the surface of the pipeline. When in use, the pipeline is placed on the top of the placement seat and supported by the inclined surfaces on both sides, and then the bottom of the pipeline abuts against the guide wheel. At this time, the pipeline is pushed to move along the guide wheel and pass through multiple placement seats and the upper pressure plate in sequence to complete the guidance. The upper pressure plate is then driven down by the cylinder to squeeze the pipeline downward, and the placement seat is compressed to squeeze the jacking spring downward to drive the pipeline to move downward. The rotating cylinder drives the guide frame to rotate along the sliding track, and stops after rotating until the pipeline is coaxial with the sealing connection sleeves of the two connecting mechanisms. At this time, the driving cylinder at the water outlet connecting mechanism drives the sleeve to move forward as a whole, sleeved on the end of the pipeline, and pushes the pipeline to move toward the return water connecting mechanism, and then the cylinders inside the two sleeves At the same time, the sealing sleeve is driven to move toward the pipeline, and then is put on the surface of the pipeline through the truncated cone groove. The outer end face of the pipeline is circumferentially in contact with the sealing gasket in the inner cavity of the truncated cone groove. Under the thrust toward the middle applied by the sealing sleeves on both sides to the pipeline, the sealing gasket expands to seal the gap between the truncated cone groove and the pipeline, so that the long straight pipeline can be quickly loaded, fixed and connected, and a good sealing effect is guaranteed when the alignment can be quickly calibrated. It can be adapted to pipelines of various sizes for processing, and then the lifting cylinder is driven to drive the semicircular bracket to move downward. At this time, the circulating pump is started to form a water circulation, and then the position probe is abutted against the surface of the pipeline. When the pipeline moves, the thrust of the reset spring can keep the position probe pressed against the surface of the pipeline, which can effectively detect the distance of the offset in all directions of the pipeline, and the data obtained is more accurate, which can effectively judge the displacement of the pipeline under the water hammer effect. At this time, the water hammer effect is formed by adjusting the opening and closing of the switch valve, and the performance is tested by detecting the vibration state and limit data of the pipeline.

[0015] As a further solution of the present invention: three placement seats are provided and are evenly distributed in the guide frame, providing support at multiple points to ensure the stability of the pipeline and enable the pipeline to be quickly introduced.

[0016] As a further solution of the present invention: a flow meter and a pressure-stabilizing water supply device are arranged on the surface of the water outlet pipe to ensure the stability of water supply and to adjust the flow rate.

[0017] As a further solution of the present invention: the water outlet pipe is composed of multiple sections of plastic pipes connected by hot-melt sleeves, and the length can be freely adjusted to meet different water outlet pipe length requirements.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, the outer end face of the pipe is circumferentially in contact with the sealing gasket of the inner cavity of the truncated cone groove. When the sealing connecting sleeves on both sides simultaneously apply a thrust toward the middle of the pipe, the sealing gasket expands to seal the gap between the truncated cone groove and the pipe, and the long straight pipe is quickly loaded, fixed and connected, and a good sealing effect is guaranteed during rapid calibration and alignment, and the pipes of various sizes and calibers can be processed.

[0020] 2. In the present invention, when the pipeline moves, the thrust of the reset spring can continuously push the position probe to be squeezed against the surface of the pipeline, and the offset of the pipeline in all directions can be effectively detected. The obtained data is more accurate and can effectively determine the displacement of the pipeline under the water hammer effect. At this time, the water hammer effect is formed by adjusting the opening and closing of the switch valve, and the performance is tested by detecting the vibration state and limit data of the pipeline.

[0021] 3. The present invention, through the provision of the guide wheel, can smoothly move the pipeline forward and backward to adjust its position while the pipeline is placed on the placement seat to limit the left and right positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A top view of the structure of the pipeline in the connected state of the present invention;

[0023] Figure 2 It is a top view of the structure of the pipeline in the feeding state of the present invention;

[0024] Figure 3 It is a structural front view of the guide frame of the present invention;

[0025] Figure 4 It is a structural cross-sectional view of the sleeve of the present invention;

[0026] Figure 5 It is the structural front view of the movable frame of the present invention.

[0027] In the figure: 1. test bench; 2. rotating cylinder; 3. sliding track; 4. guide frame; 5. lifting spring; 6. placement seat; 7. guide wheel; 8. upper pressure plate; 9. sleeve; 11. sealing connection sleeve; 12. truncated table groove; 13. sealing gasket; 14. pipeline; 15. fixed pipeline; 16. switch valve; 17. telescopic end; 18. return pipeline; 19. water outlet pipeline; 20. circulation pump; 21. water tank; 22. driving cylinder; 23. lifting cylinder; 24. semicircular bracket; 25. movable frame; 26. position probe; 27. limit ring; 28. reset spring. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1-5 The present invention provides a technical solution: a pipeline performance test system based on a water hammer tester, comprising a test bench 1, a limiting mechanism arranged above the test bench 1 for limiting a pipeline 14, a connecting mechanism arranged on both sides of the limiting mechanism for connecting two ends of the pipeline 14 for water outlet and water return, a water supply mechanism arranged on the side of the test bench 1 and connected with the two connecting mechanisms to form a water cycle, and a detection mechanism for detecting the position of the pipeline 14, the two connecting mechanisms each comprising two sleeves 9 respectively arranged at both ends of the test bench 1, the inner cavity of the sleeve 9 is slidably connected with a sealing connection sleeve 11 driven to slide by a cylinder, the inner cavity of the sealing connection sleeve 11 is provided with a truncated cone groove 12 facing the pipeline 14, the inner cavity of the truncated cone groove 12 is attached with a sealing gasket 13 abutting against the surface of the pipeline 14, a fixed pipeline 15 connected to one side of the sealing connection sleeve 11, and a switch valve 16 is arranged on the surface of the fixed pipeline 15;

[0030] The water supply mechanism includes a water tank 21 fixed to the side of the test bench 1 and a circulation pump 20 connected to the water tank 21. The circulation pump 20 is connected to the fixed pipe 15 for the water outlet connection mechanism through the water outlet pipe 19. One end of the water tank 21 is connected to the fixed pipe for the water return connection mechanism through the return pipe 18. The ends of the water outlet pipe 19 and the return pipe 18 are both provided with a telescopic end 17.

[0031] A driving cylinder 22 is fixedly connected to the top of the test bench 1, and one end of the piston rod of the driving cylinder 22 is connected to the sleeve 9 of the water outlet communication mechanism;

[0032] The detection mechanism includes a lifting cylinder 23 fixed above the return water connecting mechanism sleeve 9, one end of the piston rod of the lifting cylinder 23 is fixedly connected to a semicircular bracket 24, the inner cavity of the semicircular bracket 24 is fixedly connected to a movable frame 25, the inner cavity of the movable frame 25 is slidably connected to a position probe 26 whose end abuts against the surface of the pipeline 14, the surface of the position probe 26 located between the semicircular bracket 24 and the movable frame 25 is fixedly connected to a limit ring 27, the surface of the position probe 26 is sleeved with a reset spring 28 whose two ends are respectively fixedly connected to the limit ring 27 and the movable frame 25, and the position probe 26 is connected to the external distance detection mechanism through a wire.

[0033] There are multiple position probes 26, and they are evenly wrapped around the upper half of the pipe 14 on the movable frame 25. The position probes 26 in the upper half are in contact with the surface of the pipe 14. When the pipe 14 moves, the thrust of the reset spring 28 can keep the position probes 26 pressed against the surface of the pipe 14. The distance detection of the displacement of the pipe 14 in all directions can be effectively performed, and the obtained data is more accurate, which can effectively judge the displacement of the pipe 14 under the water hammer effect.

[0034] The limiting mechanism includes a rotating cylinder 2 fixed above the test bench 1 and a guide frame 4 slidably arranged on the test bench 1 through a sliding track 3. One end of the piston rod of the rotating cylinder 2 is fixedly connected to the guide frame 4, and the inner cavity of the guide frame 4 is slidably connected to a placement seat 6 for placing the pipeline 14.

[0035] The top of the placement seat 6 is provided with an inclined surface for receiving the pipe 14. The middle part of the placement seat 6 is rotatably connected to a guide wheel 7 that abuts against the surface of the pipe 14. The surface of the guide wheel 7 is provided with a concave arc groove in the middle. Through the setting of the guide wheel 7, while the pipe 14 is placed on the placement seat 6 to limit the left and right positions, the guide wheel 7 can smoothly move the pipe 14 forward and backward to adjust the position.

[0036] The inner cavity of the guide frame 4 is fixedly connected with a lifting spring 5, the top of the lifting spring 5 is fixedly connected with the bottom of the placement seat 6, the top of the guide frame 4 is slidably connected with an upper pressure plate 8 driven up and down by a cylinder, and the bottom of the upper pressure plate 8 is provided with a trapezoidal groove abutting against the surface of the pipe 14. When in use, the pipe 14 is placed above the placement seat 6 and supported by the inclined surfaces on both sides, and then the bottom of the pipe 14 abuts against the guide wheel 7. At this time, the pipe 14 is pushed along the guide wheel 7 to move through multiple placement seats 6 and the upper pressure plate 8 in sequence to complete the guidance, and then the cylinder drives the pipe 14 to move upward and downward. The movable upper pressure plate 8 descends and squeezes the pipe 14 downward, and the compression placement seat 6 squeezes the lifting spring 5 downward to move, driving the pipe 14 to move downward, and then the rotating cylinder 2 drives the guide frame 4 to rotate along the sliding track 3, and stops after the pipe 14 is coaxial with the sealing connection sleeves 11 of the two connecting mechanisms. At this time, the driving cylinder 22 at the water outlet connecting mechanism drives the sleeve 9 to move forward as a whole, sleeved on the end of the pipe 14, and pushes the pipe 14 to move toward the return water connecting mechanism, and then the cylinders inside the two sleeves 9 simultaneously drive the sealing connection sleeves 11 toward the pipe 1 4 movement, and then the truncated cone groove 12 is sleeved on the surface of the pipe 14, and the outer end surface of the pipe 14 is circumferentially in contact with the sealing gasket 13 of the inner cavity of the truncated cone groove 12. Under the thrust to the middle applied by the sealing connecting sleeves 11 on both sides to the pipe 14, the sealing gasket 13 expands to seal the gap between the truncated cone groove 12 and the pipe 14, which can quickly load, fix and connect the long straight pipe 14, and ensure a good sealing effect when it can be quickly calibrated and aligned. It can be adapted to various sizes of pipes 14 for processing, and then drive the lifting cylinder 23 to drive the semicircular bracket 2 4 moves downward, at this time, the circulation pump 20 is started to form a water circulation, and then the position probe 26 is abutted against the surface of the pipe 14. When the pipe 14 moves, the thrust of the return spring 28 can always push the position probe 26 to be pressed against the surface of the pipe 14, which can effectively detect the distance of the displacement of the pipe 14 in all directions. The obtained data is more accurate and can effectively determine the displacement of the pipe 14 under the water hammer effect. At this time, the water hammer effect is formed by adjusting the opening and closing of the switch valve 16, and the performance is tested by detecting the vibration state and limit data of the pipe 14.

[0037] There are three placement seats 6 , which are evenly distributed in the guide frame 4 , and multiple points of support are provided to ensure the stability of the pipeline 14 and enable the pipeline 14 to be quickly introduced.

[0038] The surface of the water outlet pipe 19 is provided with a flow meter and a pressure-stabilizing water supply device to ensure the stability of the water supply and to adjust the flow rate.

[0039] The water outlet pipe 19 is composed of multiple sections of plastic pipes connected by hot-melt sleeves, and the length can be freely adjusted to meet different requirements for the length of the water outlet pipe 19.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pipeline performance testing system based on a water hammer tester, comprising a test bench (1), a limiting mechanism arranged above the test bench (1) for limiting the position of a pipeline (14), a connecting mechanism arranged on both sides of the limiting mechanism for connecting the two ends of the pipeline (14) for water outflow and water return, a water supply mechanism arranged on the side of the test bench (1) and connected to the two connecting mechanisms to form a water circulation, and a detection mechanism for detecting the position of the pipeline (14), characterized in that: The two connecting mechanisms each comprise two sleeves (9) respectively arranged at two ends of the test bench (1); the inner cavity of the sleeve (9) is slidably connected to a sealing connection sleeve (11) driven to slide by a cylinder; the inner cavity of the sealing connection sleeve (11) is provided with a truncated cone groove (12) facing the pipeline (14); the inner cavity of the truncated cone groove (12) is attached with a sealing gasket (13) abutting against the surface of the pipeline (14); one side of the sealing connection sleeve (11) is connected to a fixed pipeline (15); the surface of the fixed pipeline (15) is provided with a switch valve (16); The water supply mechanism comprises a water tank (21) fixed to the side of the test bench (1) and a circulation pump (20) connected to the water tank (21); the circulation pump (20) is connected to a fixed pipe (15) for the water outlet communication mechanism via a water outlet pipe (19); one end of the water tank (21) is connected to the fixed pipe for the water return communication mechanism via a return pipe (18); and the ends of the water outlet pipe (19) and the return pipe (18) are both provided with telescopic ends (17); A driving cylinder (22) is fixedly connected to the top of the test bench (1), and one end of the piston rod of the driving cylinder (22) is connected to the sleeve (9) of the water outlet communication mechanism; The detection mechanism comprises a lifting cylinder (23) fixed above the return water connection mechanism sleeve (9); one end of the piston rod of the lifting cylinder (23) is fixedly connected to a semicircular bracket (24); the inner cavity of the semicircular bracket (24) is fixedly connected to a movable frame (25); the inner cavity of the movable frame (25) is slidably connected to a position probe (26) whose end abuts against the surface of the pipeline (14); the surface of the position probe (26) located between the semicircular bracket (24) and the movable frame (25) is fixedly connected to a limit ring (27); the surface of the position probe (26) is sleeved with a return spring (28) whose two ends are respectively fixedly connected to the limit ring (27) and the movable frame (25); the position probe (26) is connected to an external distance detection mechanism through a wire.

2. A pipeline performance testing system based on a water hammer tester according to claim 1, characterized in that: A plurality of position probes (26) are provided and are evenly wrapped around the upper half of the pipeline (14) on the movable frame (25).

3. A pipeline performance testing system based on a water hammer tester according to claim 1, characterized in that: The limiting mechanism comprises a rotary cylinder (2) fixed above a test bench (1) and a guide frame (4) slidably arranged on the test bench (1) via a sliding track (3); one end of a piston rod of the rotary cylinder (2) is fixedly connected to the guide frame (4); and an inner cavity of the guide frame (4) is slidably connected to a placement seat (6) for placing a pipeline (14).

4. A pipeline performance testing system based on a water hammer tester according to claim 3, characterized in that: The top of the placement seat (6) is provided with an inclined surface for receiving the pipeline (14); the middle part of the placement seat (6) is rotatably connected to a guide wheel (7) that abuts against the surface of the pipeline (14); and the surface of the guide wheel (7) is provided with a concave arc groove in the middle.

5. A pipeline performance testing system based on a water hammer tester according to claim 3, characterized in that: The inner cavity of the guide frame (4) is fixedly connected to a lifting spring (5), the top of which is fixedly connected to the bottom of the placement seat (6), and the top of the guide frame (4) is slidably connected to an upper pressure plate (8) driven up and down by a cylinder, and the bottom of the upper pressure plate (8) is provided with a trapezoidal groove that abuts against the surface of the pipe (14).

6. A pipeline performance testing system based on a water hammer tester according to claim 3, characterized in that: The placement seats (6) are provided in three numbers and are evenly distributed in the guide frame (4).

7. A pipeline performance testing system based on a water hammer tester according to claim 1, characterized in that: A flow meter and a pressure-stabilizing water supply device are arranged on the surface of the water outlet pipe (19).

8. A pipeline performance testing system based on a water hammer tester according to claim 1, characterized in that: The water outlet pipe (19) is composed of multiple sections of plastic pipes connected by hot-melt sleeves.

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