Water supply and drainage pipe pressure testing machine and pressure testing method

Abstract

The invention discloses a water supply and drainage pipe pressure testing machine and a pressure testing method, and relates to the technical field of drainage pipe pressure testing detection.The water supply and drainage pipe pressure testing machine comprises a pressure testing table, a pressure testing mechanism, a pipe clamping mechanism and a prompting mechanism, a drainage pipe is placed above the pressure testing table, the pressure testing mechanism is arranged above the pressure testing table, and the pipe clamping mechanism is arranged in the pressure testing table; the pipe clamping mechanism is arranged in a hidden mode, and the prompting mechanism is arranged above the pressure testing table and used for prompting workers to hide the pipe clamping mechanism. According to the invention, the water drainage pipe is clamped at the top end of the pressure test table through the pipe clamping mechanism, then the pressure test mechanism works until the pressure test mechanism is in contact with and abuts against the water drainage pipe, and then the pipe clamping mechanism can be hidden in the pressure test table, and at the moment, the pressure test mechanism is not affected when carrying out pressure test detection on the water drainage pipe, so that the accuracy of pressure test detection on the water drainage pipe is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure testing for drainage pipes, and particularly relates to a pressure testing machine and a pressure testing method for water supply and drainage pipes. Background Art

[0002] Drainage pipes are pipes used for collecting and discharging liquids such as wastewater and rainwater, and are widely used in fields such as construction, municipal administration, environmental protection, and agriculture.

[0003] After the production of drainage pipes, in order to ensure the use quality of drainage pipes, compressive testing is carried out on the drainage pipes. For example, in the patent with the application number 202020998411.5 and the name of an anti-compression testing device for pressure pipes, the pipe is clamped on a V-shaped placement table, and then the pipe is extruded by the downward movement of the pressing plate, and the pressure data is recorded by a pressure sensor.

[0004] However, after the drainage pipe is squeezed, the V-shaped placement table will provide oblique support for the drainage pipe, thereby strengthening the compressive capacity of the drainage pipe, resulting in an impact on the compressive testing of the drainage pipe, and thus reducing the accuracy of the pressure testing of the drainage pipe. For this reason, we propose a pressure testing machine and a pressure testing method for water supply and drainage pipes. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure testing machine and a pressure testing method for water supply and drainage pipes to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A pressure testing machine for water supply and drainage pipes, comprising: A pressure testing table, on which a drainage pipe is placed above the pressure testing table; A pressure testing mechanism, which is arranged above the pressure testing table; A pipe clamping mechanism, which is arranged inside the pressure testing table, and the pipe clamping mechanism is hidden; A prompting mechanism, which is arranged above the pressure testing table, and the prompting mechanism is used to remind the staff to hide the pipe clamping mechanism.

[0007] Preferably, the pressure testing mechanism includes: A top plate, which is arranged above the pressure testing table, and a guiding mechanism is arranged between the top plate and the pressure testing table; A pressing plate, which is arranged between the pressure testing table and the top plate; A pressure sensor, which is installed at the top end of the pressing plate, and a first cylinder is installed at the top end of the top plate, and the output end of the first cylinder penetrates through the top end of the top plate and is connected to the pressure sensor.

[0008] Preferably, the guiding mechanism includes: A guide rod, the top end of the guide rod is fixedly connected to the bottom end of the top plate, and the bottom end of the guide rod is fixedly connected to the top end of the pressure test bench; A guide hole, the guide hole is opened at the top end of the extrusion plate, and the outer wall of the guide rod is movably inserted into the inner wall of the guide hole.

[0009] Preferably, the pipe clamping mechanism includes: Rotating clamping plates, a slot is opened at the top end of the pressure test bench, the rotating clamping plates are symmetrically arranged, and the rotating clamping plates are rotatably arranged inside the slot; A rotating mechanism, the rotating mechanism is arranged inside the slot; An extension mechanism, the extension mechanism is arranged on the outer wall of the rotating clamping plate.

[0010] Preferably, the rotating mechanism includes: An incomplete gear, the incomplete gear is rotatably connected to the inner wall of the slot, and the outer wall of the incomplete gear is fixedly connected to one side of the rotating clamping plate; A first rack, the first rack is symmetrically arranged on the inner wall of the slot, and the outer wall of the first rack is meshed with the outer wall of the incomplete gear; A moving mechanism, the moving mechanism is arranged below the first rack.

[0011] Preferably, the moving mechanism includes: A first L-shaped rod, the first L-shaped rod is fixedly connected to the bottom end of one of the first racks; A second L-shaped rod, the second L-shaped rod is fixedly connected to the bottom end of the other one of the first racks; A second rack, the second rack is fixedly connected to the bottom end of the first L-shaped rod and the top end of the second L-shaped rod respectively; A connecting gear, the connecting gear is rotatably connected to the inner wall of the slot, and the outer wall of the connecting gear is meshed with the outer walls of the two second racks respectively; A second cylinder, an installation groove is opened on the inner wall of the slot, the second cylinder is installed inside the installation groove, and the output end of the second cylinder is in transmission connection with one side of the second L-shaped rod.

[0012] Preferably, the extension mechanism includes: An extension plate, a chute is opened on one side of the extension plate, and the outer wall of the rotating clamping plate is slidably connected to the inner wall of the chute; A threaded rod, the threaded rod is fixedly connected to the bottom end of the rotating clamping plate, a connecting groove is opened at the bottom end of the extension plate, the threaded rod is inserted into the inner wall of the connecting groove, and a locking nut is threadedly sleeved on the outer wall of the threaded rod.

[0013] Preferably, the prompting mechanism includes: An audible and visual indicator, which is installed on the top of the extrusion plate; a first joint mounted on a bottom end of the extruded plate; A second joint, a lifting block is provided on the top of the pressure test platform, and a spring is provided between the second joint and the lifting block; A movable rod, the top end of the movable rod is fixedly connected to the bottom end of the second joint, the top end of the lifting block is provided with a movable hole, the outer wall of the movable rod is movably connected to the inner wall of the movable hole, and the spring is sleeved on the outer wall of the movable rod; The lifting mechanism is arranged at the bottom end of the lifting block.

[0014] Preferably, the lifting mechanism includes: A third cylinder, a lifting groove is provided on the top of the pressure test platform, the lifting block is inserted into the lifting groove, the third cylinder is installed on the inner wall of the lifting groove, and the output end of the third cylinder is transmission-connected to the bottom end of the lifting block; A limit block is fixedly connected to one side of the lifting block, the inner wall of the lifting slot is provided with a limit slot, and the outer wall of the limit block is slidably connected to the inner wall of the limit slot.

[0015] The present invention also provides a water supply and drainage pipe pressure testing method, comprising the following steps: Step 1: Place the drainage pipe to be tested on the top of the test bench, then the second cylinder works to drive the second L-shaped rod to move, and the movement of the second L-shaped rod drives the second rack on it to move. Through the engagement of the second rack with the connecting gear, the other second rack can be driven to move, so that the two first racks move away from each other. Through the engagement of the first rack with the incomplete gear, the two incomplete gears can be driven to rotate relative to each other. The rotation of the incomplete gear can drive the rotating clamping plate to rotate until the two extension plates are against the outer wall of the drainage pipe, completing the fixation of the drainage pipe; Step 2: The third cylinder works to drive the lifting block to rise. Through the connection of the spring, the lifting block rises and drives the second joint to rise until the top of the second joint is flush with the top of the drainage pipe; Step 3: The first cylinder works to drive the pressure sensor and the extrusion plate downward until the extrusion plate contacts the top of the drainage pipe. When the extrusion plate descends, it drives the first joint downward until the first joint contacts the second joint. At this time, the sound and light indicator is powered on and emits sound and light prompts. The staff operates the third cylinder to drive the lifting block downward until the second joint is hidden in the lifting groove, and makes the second cylinder work, so that the two rotating splints rotate back to back and hide in the slot. At the same time, the extrusion plate continues to descend to squeeze the drainage pipe, and the pressure data is recorded through the pressure sensor.

[0016] The technical effects and advantages of the present invention are as follows: The present invention utilizes the arrangement of a pipe clamping mechanism. The drainage pipe is clamped at the top of the pressure test bench by the pipe clamping mechanism, and then the pressure test mechanism operates until it contacts and abuts against the drainage pipe. Then, the pipe clamping mechanism can be hidden into the pressure test bench. At this time, the pressure test mechanism will not be affected when performing a pressure test on the drainage pipe, thereby improving the accuracy of the pressure test for the drainage pipe; The present invention utilizes the arrangements of a prompting mechanism and a lifting mechanism. The first cylinder operates to drive the pressure sensor and the pressing plate to move downward until the pressing plate contacts the top of the drainage pipe. While the pressing plate descends, it drives the first connector to descend until the first connector contacts the second connector. At this time, the sound and light prompt device is powered on to work and emits sound and light prompts, thereby prompting the staff to operate the third cylinder and the second cylinder to hide the prompting mechanism and the pipe clamping mechanism, ensuring that the operation of the pressure test mechanism is not affected. Description of the Drawings

[0017] Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a schematic front cross-sectional structure diagram of the present invention; Figure 3 is a schematic front cross-sectional structure diagram of the lifting block of the present invention; Figure 4 is the present invention Figure 2 partial enlarged structure diagram at A of; Figure 5 is the present invention Figure 2 partial enlarged structure diagram at B of; In the figure: 101, pressure test bench; 102, top plate; 103, pressing plate; 104, first cylinder; 105, pressure sensor; 106, guide rod; 107, guide hole; 201, slot; 202, rotating clamping plate; 301, incomplete gear; 302, first rack; 401, first L-shaped rod; 402, second L-shaped rod; 403, second rack; 404, connecting gear; 405, installation groove; 406, second cylinder; 501, extension plate; 502, chute; 503, connecting groove; 504, threaded rod; 505, locking nut; 601, sound and light prompt device; 602, first connector; 603, second connector; 604, lifting groove; 605, lifting block; 606, spring; 607, movable rod; 608, movable hole; 609, limiting groove; 610, limiting block; 611, third cylinder. Detailed Embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] The present invention provides a Figures 1 - 5 water supply and drainage pipe testing press as shown, which includes a testing platform, a testing mechanism, a pipe clamping mechanism, and a prompting mechanism. A drainage pipe is placed above the testing platform. The testing mechanism is arranged above the testing platform. The pipe clamping mechanism is arranged inside the testing platform, and the pipe clamping mechanism is hidden. The prompting mechanism is arranged above the testing platform, and the prompting mechanism is used to remind the staff to hide the pipe clamping mechanism. The drainage pipe is clamped at the top of the testing platform by the pipe clamping mechanism, and then the testing mechanism works until it contacts and abuts against the drainage pipe. Then the pipe clamping mechanism can be hidden into the testing platform. At this time, the testing mechanism will not be affected when testing the drainage pipe, thereby improving the accuracy of the drainage pipe pressure testing.

[0020] Among them, the testing mechanism includes a top plate, a pressing plate, and a pressure sensor. The top plate is arranged above the testing platform. A guiding mechanism is arranged between the top plate and the testing platform. The pressing plate is arranged between the testing platform and the top plate. The pressure sensor is installed at the top of the pressing plate. A first cylinder is installed at the top of the top plate, and the output end of the first cylinder penetrates through the top of the top plate and is connected to the pressure sensor. By the operation of the first cylinder, the pressure sensor and the pressing plate are driven, so that the pressing plate presses the drainage pipe, and the pressure data is collected by the pressure sensor.

[0021] Among them, the guiding mechanism includes a guiding rod and a guiding hole. The top end of the guiding rod is fixedly connected to the bottom end of the top plate, and the bottom end of the guiding rod is fixedly connected to the top end of the testing platform. The guiding hole is opened at the top of the pressing plate, and the outer wall of the guiding rod is movably inserted into the inner wall of the guiding hole. By the mutual limiting and guiding of the guiding rod and the guiding hole, the first cylinder can work stably to drive the pressing plate to lift and lower, thereby improving the stability of the operation of the testing mechanism.

[0022] Among them, the pipe clamping mechanism includes a rotating clamping plate, a rotating mechanism, and an extending mechanism. A slot is opened at the top of the testing platform. The rotating clamping plates are arranged symmetrically, and the rotating clamping plates are rotatably arranged inside the slot. The rotating mechanism is arranged inside the slot, and the extending mechanism is arranged on the outer wall of the rotating clamping plate. By the simultaneous rotation of the two rotating clamping plates in the slot, the two rotating clamping plates are in a V-shaped state to clamp the drainage pipe. As the pressing plate in the testing mechanism descends until the pressing plate abuts against the drainage pipe, the two rotating clamping plates rotate in the opposite direction and are hidden into the slot, which can avoid the influence on the drainage pipe during the pressure testing process, thereby improving the accuracy of the drainage pipe pressure testing.

[0023] Among them, the rotating mechanism includes an incomplete gear, a first rack and a moving mechanism. The incomplete gear is rotatably connected to the inner wall of the slot, the outer wall of the incomplete gear is fixedly connected to one side of the rotating clamping plate, the first rack is symmetrically arranged on the inner wall of the slot, the outer wall of the first rack is meshed with the outer wall of the incomplete gear, and the moving mechanism is arranged below the first rack. By moving the two first racks back to back, the two meshing incomplete gears can be driven to rotate relative to each other, and the two rotating clamping plates can be driven to rotate relative to each other, and the drainage pipe can be stably clamped by the rotating clamping plate, and the drainage pipe can be clamped directly below the extrusion plate, thereby improving the stability of the pipe clamping mechanism.

[0024] Among them, the moving mechanism includes a first L-shaped rod, a second L-shaped rod, a second rack, a connecting gear and a second cylinder. The first L-shaped rod is fixedly connected to the bottom end of one of the first racks, the second L-shaped rod is fixedly connected to the bottom end of the other first rack, and the second rack is fixedly connected to the bottom end of the first L-shaped rod and the top end of the second L-shaped rod respectively. The connecting gear is rotatably connected to the inner wall of the slot, and the outer wall of the connecting gear is respectively meshed with the outer walls of the two second racks. The inner wall of the slot is provided with a mounting groove, and the second cylinder is installed inside the mounting groove. The output end of the second cylinder is transmission-connected to one side of the second L-shaped rod. The second L-shaped rod is driven to move by the operation of the second cylinder, and then the second rack and the first L-shaped rod are meshed with each other through the engagement of the second rack and the connecting gear. Therefore, the two incomplete gears can rotate at the same time, thereby improving the convenience and stability of the operation of the tube clamping mechanism.

[0025] Among them, the extension mechanism includes an extension plate and a threaded rod. A sliding groove is provided on one side of the extension plate. The outer wall of the rotating clamping plate is slidably connected to the inner wall of the sliding groove. The threaded rod is fixedly connected to the bottom end of the rotating clamping plate. A connecting groove is provided at the bottom end of the extension plate. The threaded rod is inserted into the inner wall of the connecting groove. The outer wall of the threaded rod is threaded with a locking nut. The extension plate moves on the outer wall of the rotating clamping plate, and then the locking nut is tightened on the outer wall of the threaded rod, so that the locking nut is against the outer wall of the extension plate, so that the pipe clamping mechanism can clamp drainage pipes of different sizes, thereby improving the applicability of the pipe clamping mechanism.

[0026] Among them, the prompting mechanism includes an acoustic-optic prompt, a first joint, a second joint, a movable rod, and a lifting mechanism. The acoustic-optic prompt is installed at the top end of the extrusion plate, the first joint is installed at the bottom end of the extrusion plate, a lifting block is provided at the top end of the pressure test bench, a spring is provided between the second joint and the lifting block, the top end of the movable rod is fixedly connected to the bottom end of the second joint, a movable hole is opened at the top end of the lifting block, and the outer wall of the movable rod is movably inserted into the inner wall of the movable hole. The spring is sleeved on the outer wall of the movable rod. The lifting mechanism is arranged at the bottom end of the lifting block. The lifting mechanism includes a third air cylinder and a limiting block. A lifting groove is opened at the top end of the pressure test bench. The lifting block is inserted into the interior of the lifting groove. The third air cylinder is installed on the inner wall of the lifting groove, and the output end of the third air cylinder is in transmission connection with the bottom end of the lifting block. The limiting block is fixedly connected to one side of the lifting block. A limiting groove is opened on the inner wall of the lifting groove, and the outer wall of the limiting block is slidably connected to the inner wall of the limiting groove. After the drainage pipe is positioned, the third air cylinder works to drive the lifting block to rise. Through the connection of the spring, the rising of the lifting block drives the second joint to rise until the top end of the second joint is flush with the top end of the drainage pipe. The first air cylinder works to drive the pressure sensor and the extrusion plate to move downward until the extrusion plate contacts the top end of the drainage pipe. While the extrusion plate descends, it drives the first joint to descend until the first joint contacts the second joint. At this time, the acoustic-optic prompt is powered on to work and emits an acoustic-optic prompt, thereby prompting the staff to operate the third air cylinder and the second air cylinder to hide the prompting mechanism and the pipe clamping mechanism, ensuring that the work of the pressure test mechanism is not affected.

[0027] The present invention also provides a method for pressure testing of water supply and drainage pipes, including the following steps: Step 1: Place the drainage pipe to be tested on the top end of the pressure test bench. Then, the second air cylinder works to drive the second L-shaped rod to move. The movement of the second L-shaped rod drives the second rack thereon to move. Through the engagement of the second rack and the connecting gear, the other second rack can be driven to move, so that the two first racks move away from each other. Through the engagement of the first rack and the incomplete gear, the two incomplete gears can be driven to rotate relatively. The rotation of the incomplete gear drives the rotating clamping plate to rotate until the two extension plates abut against the outer wall of the drainage pipe, completing the fixation of the drainage pipe. Step 2: The third air cylinder works to drive the lifting block to rise. Through the connection of the spring, the rising of the lifting block drives the second joint to rise until the top end of the second joint is flush with the top end of the drainage pipe. Step 3: The first cylinder operates to drive the pressure sensor and the extrusion plate to move downward until the extrusion plate contacts the top end of the drainage pipe. While the extrusion plate descends, it drives the first joint to descend until the first joint contacts the second joint. At this time, the sound and light indicator is powered on to work and emits sound and light prompts. The staff operates the third cylinder to drive the lifting block to descend until the second joint is hidden and enters the lifting groove, and then makes the second cylinder work, causing the two rotating clamping plates to rotate away from each other and hide into the slotted openings. At the same time, the extrusion plate continues to descend to extrude the drainage pipe, and the pressure sensor records the pressure data.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water supply and drainage pipe testing press, characterized in that, Including: A pressure test bench (101), with drainage pipes placed above the pressure test bench (101); A pressure test mechanism, which is arranged above the pressure test bench (101); A pipe clamping mechanism, which is arranged inside the pressure test bench (101) and is hidden; A prompting mechanism, which is arranged above the pressure test bench (101) and is used to remind the staff to hide the pipe clamping mechanism.

2. The water supply and drainage pipe testing press according to claim 1, wherein, The pressure test mechanism includes: A top plate (102), which is arranged above the pressure test bench (101), and a guiding mechanism is arranged between the top plate (102) and the pressure test bench (101); A pressing plate (103), which is arranged between the pressure test bench (101) and the top plate (102); A pressure sensor (105), which is installed at the top end of the pressing plate (103), and a first cylinder (104) is installed at the top end of the top plate (102). The output end of the first cylinder (104) penetrates through the top end of the top plate (102) and is connected to the pressure sensor (105).

3. The water supply and drainage pipe testing press according to claim 2, characterized in that, The guiding mechanism includes: A guiding rod (106), the top end of the guiding rod (106) is fixedly connected to the bottom end of the top plate (102), and the bottom end of the guiding rod (106) is fixedly connected to the top end of the pressure test bench (101); A guiding hole (107), which is opened at the top end of the pressing plate (103), and the outer wall of the guiding rod (106) is movably inserted into the inner wall of the guiding hole (107).

4. The water supply and drainage pipe testing press according to claim 1, characterized in that, The pipe clamping mechanism includes: Rotating clamping plates (202), a slot (201) is opened at the top end of the pressure test bench (101), the rotating clamping plates (202) are symmetrically arranged, and the rotating clamping plates (202) are rotatably arranged inside the slot (201); A rotating mechanism, which is arranged inside the slot (201); An extending mechanism, which is arranged on the outer wall of the rotating clamping plate (202).

5. The water supply and drainage pipe testing machine according to claim 4, characterized in that, The rotating mechanism includes: An incomplete gear (301), which is rotatably connected to the inner wall of the slot (201), and the outer wall of the incomplete gear (301) is fixedly connected to one side of the rotating clamping plate (202); A first rack (302), which is symmetrically arranged on the inner wall of the slot (201), and the outer wall of the first rack (302) is meshed with the outer wall of the incomplete gear (301); A moving mechanism, which is arranged below the first rack (302).

6. The water supply and drainage pipe testing press according to claim 5, characterized in that, The moving mechanism includes: A first L-shaped rod (401), the first L-shaped rod (401) is fixedly connected to the bottom end of one of the first racks (302); A second L-shaped rod (402), the second L-shaped rod (402) is fixedly connected to the bottom end of the other first rack (302); A second rack (403), which is respectively fixedly connected to the bottom end of the first L-shaped rod (401) and the top end of the second L-shaped rod (402); Connecting gear (404), the connecting gear (404) is rotatably connected to the inner wall of the slot (201), and the outer wall of the connecting gear (404) is meshed and connected to the outer walls of two second racks (403); Second cylinder (406), an installation groove (405) is opened on the inner wall of the slot (201), the second cylinder (406) is installed inside the installation groove (405), and the output end of the second cylinder (406) is drivingly connected to one side of the second L-shaped rod (402).

7. A water supply and drainage pipe testing press according to claim 4, characterized in that The extension mechanism includes: Extension plate (501), a chute (502) is opened on one side of the extension plate (501), and the outer wall of the rotating clamping plate (202) is slidably connected to the inner wall of the chute (502); Threaded rod (504), the threaded rod (504) is fixedly connected to the bottom end of the rotating clamping plate (202), a connection groove (503) is opened at the bottom end of the extension plate (501), the threaded rod (504) is inserted through the inner wall of the connection groove (503), and a locking nut (505) is threadedly sleeved on the outer wall of the threaded rod (504).

8. A water supply and drainage pipe testing press according to claim 2, characterized in that, The prompting mechanism includes: Acousto-optic promptor (601), the acousto-optic promptor (601) is installed at the top end of the extrusion plate (103); First joint (602), the first joint (602) is installed at the bottom end of the extrusion plate (103); Second joint (603), a lifting block (605) is arranged at the top end of the pressure test bench (101), and a spring (606) is arranged between the second joint (603) and the lifting block (605); Movable rod (607), the top end of the movable rod (607) is fixedly connected to the bottom end of the second joint (603), a movable hole (608) is opened at the top end of the lifting block (605), the outer wall of the movable rod (607) is movably inserted through the inner wall of the movable hole (608), and the spring (606) is sleeved on the outer wall of the movable rod (607); Lifting mechanism, the lifting mechanism is arranged at the bottom end of the lifting block (605).

9. The water supply and drainage pipe testing press according to claim 8, characterized in that, The lifting mechanism includes: Third cylinder (611), a lifting groove (604) is opened at the top end of the pressure test bench (101), the lifting block (605) is inserted through the inside of the lifting groove (604), the third cylinder (611) is installed on the inner wall of the lifting groove (604), and the output end of the third cylinder (611) is drivingly connected to the bottom end of the lifting block (605); Limit block (610), the limit block (610) is fixedly connected to one side of the lifting block (605), a limit groove (609) is opened on the inner wall of the lifting groove (604), and the outer wall of the limit block (610) is slidably connected to the inner wall of the limit groove (609).

10. A method for pressure testing a water supply and drainage pipe according to any one of claims 1-9, characterized in that, Including the following steps: Step 1: Place the drainage pipe to be tested on the top of the pressure test bench (101). Then, the second cylinder (406) works to drive the second L-shaped rod (402) to move. The movement of the second L-shaped rod (402) drives the second rack (403) thereon to move. Through the meshing of the second rack (403) and the connecting gear (404), the other second rack (403) can be driven to move, so that the two first racks (302) move away from each other. Through the meshing of the first rack (302) and the incomplete gear (301), the two incomplete gears (301) can be driven to rotate relative to each other. The rotation of the incomplete gear (301) can drive the rotating clamping plate (202) to rotate until the two extension plates (501) abut against the outer wall of the drainage pipe, completing the fixation of the drainage pipe. Step 2: The third cylinder (611) works to drive the lifting block (605) to rise. Through the connection of the spring (606), the rising of the lifting block (605) drives the second joint (603) to rise until the top of the second joint (603) is flush with the top of the drainage pipe. Step 3: The first cylinder (104) works to drive the pressure sensor (105) and the extrusion plate (103) to move downward until the extrusion plate (103) contacts the top of the drainage pipe. While the extrusion plate (103) descends, it drives the first joint (602) to descend until the first joint (602) contacts the second joint (603). At this time, the sound and light indicator (601) is powered on to work and emits sound and light prompts. The operator operates the third cylinder (611) to drive the lifting block (605) to descend until the second joint (603) is hidden into the lifting groove (604), and the second cylinder (406) works to make the two rotating clamping plates (202) rotate away from each other and hide into the slotted opening (201). At the same time, the extrusion plate (103) continues to descend to extrude the drainage pipe, and the pressure sensor (105) records the pressure data.

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