Pipe hydrostatic testing machine

Abstract

The utility model relates to the technical field of pipe testing, in particular to a pipe hydrostatic testing machine. Comprising a rack; the air cylinder is arranged at the upper end of the rack; the movable block is arranged on the rack in a liftable manner, and the movable block is driven by an air cylinder; the guide column is fixedly arranged on the movable block, and the guide column is in sliding connection with the rack; the fixed block is fixedly arranged at the lower end of the rack, and the pipe is arranged between the fixed block and the movable block; and the lower flow channel is formed in the fixing block and communicates with a pipe cavity of the pipe. A detection mechanism is arranged on the rack, and the detection mechanism comprises an outer frame fixedly arranged on the rack; the fixed end of the cantilever is arranged on the outer frame, and the free end of the cantilever is pressed on the outer wall of the pipe; and the strain gauge is attached to the cantilever. The device can perform a hydrostatic test on the pipe and can monitor the deformation of the pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe testing technical field, concretely is pipe hydrostatic testing machine. BACKGROUND

[0002] The working principle of pipe hydrostatic testing machine is based on Pascal's law, using water as working medium, working through static pressure transmission. The specific steps include:

[0003] a. The pipe to be tested is installed on the fixture of the testing machine, and the sealing between the pipe and the fixture is ensured.

[0004] b. The water is pressurized to the predetermined pressure value by the high-pressure water pump.

[0005] c. After the pressure sensor senses the predetermined pressure, the control system automatically controls the operation of the water pump to maintain the set pressure.

[0006] d. After reaching the set pressure holding time, the water pump is turned off, and whether the pipe has leakage phenomenon is observed.

[0007] e. Repeat the above steps, perform multiple tests, and record and analyze the test results.

[0008] The existing pipe hydrostatic testing machine is complex to operate, and can only monitor the change of the internal water pressure of the pipe, and cannot monitor the deformation of the pipe. UTILITY MODEL CONTENT

[0009] In order to solve the technical problems existing in the background art, the utility model provides a pipe hydrostatic testing machine, which can perform hydrostatic test on the pipe and monitor the deformation of the pipe.

[0010] The technical solution adopted by the utility model to solve its technical problems is:

[0011] The pipe hydrostatic testing machine comprises:

[0012] A rack;

[0013] A gas cylinder is arranged at the upper end of the rack;

[0014] A movable block is arranged on the rack in a liftable manner, and the movable block is driven by the gas cylinder;

[0015] A guide column is fixedly arranged on the movable block, and the guide column is slidably connected with the rack;

[0016] A fixed block is fixedly arranged at the lower end of the rack, and the pipe is arranged between the fixed block and the movable block;

[0017] A lower flow channel is arranged in the fixed block, and the lower flow channel is in communication with the lumen of the pipe.

[0018] Further, the rack is provided with a detection mechanism, the detection mechanism comprises:

[0019] An outer frame is fixedly arranged on the rack;

[0020] A cantilever is arranged on the outer frame, and a free end of the cantilever is pressed on an outer wall of the pipe;

[0021] A strain gauge is arranged on the cantilever.

[0022] Further, the cantilever is curved in a horizontal direction, and the strain gauge is arranged on an outer periphery of the cantilever.

[0023] Further, a plurality of cantilevers are arranged on the outer periphery of the pipe.

[0024] Further, the outer frame is provided with a long hole in a vertical direction, and the rack is provided with a plurality of groups of fixing holes in the vertical direction and matched with the long hole.

[0025] Further, the movable block is provided with an exhaust valve, an upflow channel is arranged in the movable block and communicated with a pipe cavity of the pipe, and the upflow channel is communicated with the outside through the exhaust valve.

[0026] Further, the movable block is provided with a safety valve, and the upflow channel is communicated with the outside through the safety valve.

[0027] Further, the movable block and the upper port of the pipe are sealed and pressed by a sealing piece, and the fixed block and the lower port of the pipe are sealed and pressed by the sealing piece.

[0028] The utility model discloses the beneficial effects of:

[0029] (1) the cylinder can make the movable block press on the upper port of the pipe. The movable block seals the upper port of the pipe, the fixed block seals the lower port of the pipe, the inside of the pipe generates the closed cavity, thereby the water pressure test is carried out to the pipe, and the operation is simple and convenient.

[0030] (2) the deformation of the cantilever is monitored through the strain gauge, thereby the deformation of the pipe can be monitored.

[0031] (3) when the pipe cavity is filled with water, the exhaust valve can automatically exhaust the air in the pipe cavity, and when the pipe cavity is filled with water, the exhaust valve can be automatically closed. Thus the water pressure test is facilitated to the pipe.

[0032] (4) when the water pressure in the pipe cavity is too high, the safety valve can play a pressure relief role. BRIEF DESCRIPTION OF DRAWINGS

[0033] The utility model is further illustrated in connection with the drawings and examples.

[0034] Figure 1is a structural schematic view of the utility model;

[0035] Figure 2 is a sectional view of the utility model;

[0036] Figure 3 is Figure 2 the local sectional view at A position in middle;

[0037] Figure 4 is the structural schematic view of detection mechanism.

[0038] In the figure:

[0039] 1. frame, 2. cylinder, 3. guide column, 4. movable block, 5. pipe, 6. detection mechanism, 7. fixed block, 8. lower flow channel, 9. fixed hole, 10. safety valve, 11. exhaust valve, 12. sealing sheet, 13. upper flow channel;

[0040] 61. outer frame, 62. cantilever, 63. strain gauge, 64. long hole. DETAILED DESCRIPTION

[0041] The utility model will be further explained in detail in connection with the drawings.

[0042] Pipe hydrostatic testing machine, including frame 1, the lower end of frame 1 is provided with rubber pad for shock absorption.Cylinder 2 is fixedly arranged at the upper end of frame 1.Movable block 4 is arranged on frame 1 and can be lifted, and movable block 4 is driven by cylinder 2.Guide column 3 is fixedly arranged on movable block 4, and guide column 3 is slidably connected with frame 1.Guide column 3 is four, the lower end of guide column 3 is fixedly connected with movable block 4, and the upper end of guide column 3 is slidably inserted into frame 1, and guide column 3 can play a guiding role, so that the operation of movable block 4 is more stable and accurate.Fixed block 7 is fixedly arranged at the lower end of frame 1, and pipe 5 is arranged between fixed block 7 and movable block 4.Lower flow channel 8 is opened in fixed block 7, and lower flow channel 8 is communicated with the lumen of pipe 5.Lower flow channel 8 is communicated with water pump and pressure sensor, and water enters the lumen of pipe 5 from lower flow channel 8.

[0043] Cylinder 2 can make movable block 4 press on the upper end of pipe 5.Movable block 4 seals the upper end of pipe 5, and fixed block 7 seals the lower end of pipe 5, so that a closed cavity is formed in the inside of pipe 5, thereby the pipe is subjected to hydrostatic test, and the operation is simple and convenient.

[0044] The rack 1 is provided with a detection mechanism 6, which can monitor the deformation of the pipe 5. The specific structure of the detection mechanism 6 comprises an outer frame 61. The outer frame 61 is fixedly arranged on the rack 1. The fixed end of a cantilever 62 is arranged on the outer frame 61, and the free end of the cantilever 62 is pressed against the outer wall of the pipe 5. A strain gauge 63 is attached to the cantilever 62. In a specific implementation, the cantilever 62 is curved in the horizontal direction, and the strain gauge 63 is attached to the outer periphery of the cantilever 62. There are several cantilevers 62, which are circumferentially arranged on the outer periphery of the pipe 5.

[0045] The expansion deformation of the pipe 5 can cause the cantilever 62 to bend and deform. The deformation of the cantilever 62 is monitored by the strain gauge 63, thereby monitoring the deformation of the pipe 5.

[0046] The outer frame 61 is provided with a long hole 64 in the vertical direction, and the rack 1 is provided with a plurality of groups of fixing holes 9 matched with the long hole 64 in the vertical direction.

[0047] A plurality of detection mechanisms 6 can be arranged at different heights of the rack 1, and each detection mechanism 6 is used to monitor the deformation of the pipe 5 at its position, thereby monitoring the deformation of different positions of the pipe 5, making the monitoring data more comprehensive and reliable. Moreover, the detection mechanism 6 can also fix the pipe 5, and when the pipe wall of the pipe 5 is cracked under pressure, it can constrain the pipe wall of the pipe 5 to a certain extent, preventing the pipe wall from bursting.

[0048] The movable block 4 is provided with an exhaust valve 11 located at the top end of the movable block 4. An upper flow channel 13 is formed in the movable block 4, which communicates with the lumen of the pipe 5, and the upper flow channel 13 communicates with the outside through the exhaust valve 11.

[0049] When water is poured into the lumen of the pipe 5, the exhaust valve 11 can automatically exhaust the air in the lumen of the pipe 5, and when the lumen of the pipe 5 is filled with water, the exhaust valve 11 can automatically close. Thus, the water pressure test of the pipe 5 is facilitated.

[0050] The movable block 4 is also provided with a safety valve 10, and the upper flow channel 13 also communicates with the outside through the safety valve 10.

[0051] When the water pressure in the lumen of the pipe 5 is too high, the safety valve 10 can function as a pressure relief to prevent accidents.

[0052] The movable block 4 and the upper port of the pipe 5 are sealed and pressed together by a sealing piece 12, and the fixed block 7 and the lower port of the pipe 5 are sealed and pressed together by the sealing piece 12.

[0053] The sealing piece 12 can enhance the sealing strength between the pipe 5 and the movable block 4 and the fixed block 7.

[0054] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. Pipe hydraulic testing machine, characterized in that, include: Rack (1); A cylinder (2) is provided at the upper end of the frame (1); A movable block (4) is movably mounted on the frame (1), and the movable block (4) is driven by a cylinder (2); A guide column (3) is fixedly arranged on the movable block (4), and the guide column (3) is slidably connected to the frame (1); A fixed block (7) is fixedly arranged at the lower end of the frame (1), and the pipe (5) is arranged between the fixed block (7) and the movable block (4); The lower flow channel (8) is opened in the fixed block (7), and the lower flow channel (8) is communicated with the lumen of the pipe (5).

2. The pipe hydraulic testing machine according to claim 1, characterized in that: The frame (1) is provided with a detection mechanism (6), and the detection mechanism (6) comprises: An outer frame (61) is fixedly mounted on the frame (1); A cantilever (62), wherein the fixed end of the cantilever (62) is arranged on the outer frame (61), and the free end of the cantilever (62) is pressed against the outer wall of the pipe (5); The strain gauge (63) is attached to the cantilever (62).

3. The pipe hydraulic testing machine according to claim 2, characterized in that: The cantilever (62) is curved in the horizontal direction, and the strain gauge (63) is attached to the outer periphery of the cantilever (62).

4. The pipe hydraulic testing machine according to claim 3, characterized in that: There are a plurality of cantilevers (62), and the cantilevers (62) are evenly distributed around the circumference of the pipe (5).

5. The pipe hydraulic testing machine according to claim 2, characterized in that: The outer frame (61) is provided with a long hole (64) along the vertical direction, and the frame (1) is provided with a plurality of groups of fixing holes (9) matching the long hole (64) along the vertical direction.

6. The pipe hydraulic testing machine according to claim 1, characterized in that: An exhaust valve (11) is provided on the movable block (4), an upper flow channel (13) is provided in the movable block (4), the upper flow channel (13) is communicated with the lumen of the pipe (5), and the upper flow channel (13) is communicated with the outside world through the exhaust valve (11).

7. The pipe hydraulic testing machine according to claim 6, characterized in that: A safety valve (10) is provided on the movable block (4), and the upper flow channel (13) is connected to the outside through the safety valve (10).

8. The pipe hydraulic testing machine according to claim 1, characterized in that: The movable block (4) and the upper end of the pipe (5) are sealed and pressed together via a sealing sheet (12), and the fixed block (7) and the lower end of the pipe (5) are sealed and pressed together via a sealing sheet (12).

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