Clamping device for steel pipe hydrostatic testing machine mold and using method thereof

Abstract

The invention belongs to the technical field of steel pipe hydrostatic testing, and particularly relates to a clamping device for a steel pipe hydrostatic testing machine mold and a using method of the clamping device. The clamping device comprises a detection pipe used for testing a to-be-detected steel pipe, and the detection pipe is provided with a first positioning assembly and a second positioning assembly; the first positioning assembly and the second positioning assembly are symmetrically arranged at the two ends of the detection pipe, the first positioning assembly comprises a first positioning ring, a second positioning ring and a first air bag, the first positioning ring and the second positioning ring are both fixedly installed on the outer wall of the detection pipe, and the first air bag is fixedly installed between the first positioning ring and the second positioning ring; the second positioning assembly comprises a third positioning ring, a fourth positioning ring and a second air bag, the third positioning ring and the fourth positioning ring are both fixedly installed on the outer wall of the detection pipe, the second air bag is arranged between the third positioning ring and the fourth positioning ring, and through cooperative use of the structures, the steel pipe detection efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel pipe hydrostatic testing, and specifically relates to a clamping device for a steel pipe hydrostatic testing machine die and its usage method. Background Art

[0002] A steel pipe hydrostatic testing machine is a special equipment used to test the pressure resistance and sealing performance of steel pipes under a high-pressure water environment. It injects high-pressure water into the steel pipe to simulate the pressure conditions in actual use, so as to detect whether there are problems such as leakage, deformation, or rupture in the steel pipe, thereby ensuring that the quality and safety of the steel pipe meet relevant standards and requirements.

[0003] The clamping device for the steel pipe hydrostatic testing machine die is mainly used to firmly fix the die and ensure the sealing between it and the steel pipe, so as to conduct accurate pressure resistance and sealing tests under a high-pressure water environment, thereby ensuring the smooth progress of the test and the accuracy of the results. However, conventional clamps are not convenient to use and have complex operations, thus reducing the efficiency of the steel pipe hydrostatic test.

[0004] Therefore, the present invention provides a clamping device for a steel pipe hydrostatic testing machine die and its usage method. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A clamping device for a steel pipe hydrostatic testing machine die according to the present invention includes a test pipe for testing a steel pipe to be detected. A first positioning component and a second positioning component are arranged on the test pipe, and the first positioning component and the second positioning component are symmetrically arranged at both ends of the test pipe;

[0007] The first positioning component includes a first positioning ring, a second positioning ring, and a first airbag. The first positioning ring and the second positioning ring are both fixedly installed on the outer wall of the test pipe, and the first airbag is fixedly installed between the first positioning ring and the second positioning ring;

[0008] The second positioning component includes a third positioning ring, a fourth positioning ring, and a second airbag. The third positioning ring and the fourth positioning ring are both fixedly installed on the outer wall of the test pipe, and the second airbag is arranged between the third positioning ring and the fourth positioning ring;

[0009] Both the first airbag and the second airbag are provided with a first air nozzle;

[0010] An inlet valve, a first drain valve, and a second drain valve are arranged on the test pipe, and a pressure gauge is arranged on the test pipe.

[0011] Inside the detection tube, there is a water tank. At the top of the water tank, there is a water pump. The output end of the water pump is fixedly connected to a water delivery pipe. The other end of the water delivery pipe is connected to a water inlet valve. The input end of the water pump is communicated with the water tank through a hose. Outlet pipes are fixedly connected to both the first drain valve and the second drain valve. The other ends of the two outlet pipes both extend into the interior of the water tank.

[0012] On the outer wall of the detection tube, a guiding strip is fixedly installed. A third airbag is slidably installed on the guiding strip. A through-air pipe is provided on the third airbag. A first blocking ball is rotatably installed inside the through-air pipe. An air passage is opened inside the first blocking ball. The air passage is set in an L shape and is communicated with the third airbag.

[0013] Inside the second positioning ring, a first delivery pipe is fixedly installed. Inside the fourth positioning ring, a second delivery pipe is fixedly installed. One end of the first delivery pipe and the outer wall of the second delivery pipe are both in contact with the inner wall of the through-air pipe.

[0014] The bottom end of the first blocking ball is fixedly installed with a first gear through a connecting shaft. A first toothed plate is fixedly installed on the outer wall of the first delivery pipe. A second toothed plate is fixedly installed on the outer wall of the second delivery pipe. Both the first toothed plate and the second toothed plate are engaged with the first gear.

[0015] An air delivery channel is opened inside the guiding strip. One end of the first delivery pipe and one end of the second delivery pipe both extend into the interior of the air delivery channel. A second blocking ball is rotatably installed inside the air delivery channel. Openings are provided on the second blocking ball.

[0016] A second air nozzle is fixedly installed on the outer wall of the second blocking ball. A second gear is fixedly installed on the outer wall of the second air nozzle. A third toothed plate is slidably installed inside the guiding strip. The third toothed plate is engaged with the second gear.

[0017] One end of the third toothed plate is fixedly connected to a first connecting rope. The other end of the first connecting rope penetrates through the first delivery pipe and is fixedly connected to one end of the through-air pipe. The other end of the third toothed plate is fixedly connected to a second connecting rope. The second connecting rope penetrates through the second delivery pipe and is fixedly connected to the other end of the through-air pipe.

[0018] A usage method of a clamping device for a steel pipe hydrostatic testing machine die includes the following steps:

[0019] S1: First, sleuth the steel pipe to be detected outside the detection tube. Through an air pump, air is delivered to the first airbag and the second airbag to seal both ends of the steel pipe to be detected and the detection tube.

[0020] S2: Second, then through the water pump, the water in the water tank is sent into the space between the steel pipe to be detected and the detection tube through the water delivery pipe. Then, by observing the pressure gauge, the hydrostatic test of the steel pipe to be detected can be completed.

[0021] S3: Finally, the gas is sent into the air pipe through the guide strip, so that the third airbag expands and fits with the inner wall of the steel pipe to be tested, and then the first blocking ball is controlled to rotate to block the third airbag. At this time, the gas discharged through the guide strip will push the third airbag to slide and squeeze the water between the steel pipe to be tested and the test tube into the water tank.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The clamping device for a steel pipe water pressure testing machine mold and the use method thereof described in the present invention are as follows: when the steel pipe to be tested is sleeved outside the testing tube, the first air nozzles arranged on the first airbag and the second airbag are connected to an external air pump, and air is inflated toward the first airbag and the second airbag, so that the first airbag and the second airbag are deformed and expanded, and press against the inner wall of the steel pipe to be tested. At this time, the two ends of the gap between the steel pipe to be tested and the testing tube will be blocked, and then water is transported to the gap between the steel pipe to be tested and the testing tube through the water inlet valve, so that the water pressure test of the steel pipe to be tested can be carried out, which is convenient and quick.

[0024] 2. The clamping device for a steel pipe water pressure testing machine mold and the method of using the same described in the present invention deliver gas into the air pipe through the guide bar, so that the third airbag expands and fits against the inner wall of the steel pipe to be tested, and then the first blocking ball is controlled to rotate to block the third airbag. At this time, the gas discharged through the guide bar will push the third airbag to slide and squeeze the water between the steel pipe to be tested and the test tube into the water tank, which can not only improve the drainage efficiency, but also collect the discharged water for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a stereogram in the present invention;

[0027] Figure 2 is a cross-sectional view of the detection tube in the present invention;

[0028] Figure 3 It is a structural schematic diagram of the first drain valve in the present invention;

[0029] Figure 4 It is a structural schematic diagram of the water tank in the present invention;

[0030] Figure 5 The present invention Figure 4 A in the enlarged view;

[0031] Figure 6 The present invention Figure 4 The enlarged view of point B in the figure;

[0032] Figure 7 It is a structural schematic diagram of the pressure gauge in the present invention;

[0033] Figure 8 is in the present invention Figure 7 The enlarged view at position C in;

[0034] Figure 9 is the structural schematic diagram of the pressure gauge in the present invention;

[0035] Figure 10 is the method flow chart in the present invention.

[0036] In the figure: 1, detection tube; 2, steel pipe to be detected; 3, first positioning ring; 4, first airbag; 5, first air nozzle; 6, second positioning ring; 7, water inlet valve; 8, first drain valve; 9, water tank; 10, water pump; 11, water supply pipe; 12, water outlet pipe; 13, pressure gauge; 14, third positioning ring; 15, second airbag; 16, fourth positioning ring; 17, third airbag; 18, through air pipe; 19, first blocking ball; 20, first delivery pipe; 21, air duct; 22, guide strip; 23, air supply channel; 24, first connecting rope; 25, second connecting rope; 26, first gear; 27, first toothed plate; 28, second blocking ball; 29, second air nozzle; 30, third toothed plate; 31, second gear; 32, second delivery pipe; 33, second toothed plate. Detailed implementation manners

[0037] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0038] As Figures 1 to 9 shown, a clamping device for a steel pipe hydrostatic testing machine die according to an embodiment of the present invention includes a detection tube 1 for testing a steel pipe 2 to be detected. A first positioning component and a second positioning component are arranged on the detection tube 1, and the first positioning component and the second positioning component are symmetrically arranged at both ends of the detection tube 1;

[0039] A limiting block also needs to be arranged between the steel pipe 2 to be detected and the detection tube 1, which can avoid the problem that when the detection tube 1 floats during water filling between the steel pipe 2 to be detected and the detection tube 1, causing end deformation.

[0040] Multiple detection tubes 1 can be arranged, and the multiple detection tubes 1 are sleeved together, can slide, and a sealing gasket needs to be arranged between the multiple detection tubes 1, so that the detection tube 1 can be extended or shortened by a certain distance to adapt to the length of the steel pipe 2 to be detected.

[0041] Both the first positioning component and the second positioning component are arranged on the outer walls at both ends of the detection tube 1, and the first positioning component and the second positioning component are symmetrical.

[0042] The first positioning component includes a first positioning ring 3, a second positioning ring 6, and a first airbag 4. The first positioning ring 3 and the second positioning ring 6 are both fixedly installed on the outer wall of the detection tube 1, and the first airbag 4 is fixedly installed between the first positioning ring 3 and the second positioning ring 6;

[0043] The second positioning component includes a third positioning ring 14, a fourth positioning ring 16, and a second airbag 15. The third positioning ring 14 and the fourth positioning ring 16 are both fixedly installed on the outer wall of the detection tube 1. The second airbag 15 is arranged between the third positioning ring 14 and the fourth positioning ring 16. First air nozzles 5 are arranged on both the first airbag 4 and the second airbag 15. An inlet valve 7, a first drain valve 8, and a second drain valve are arranged on the detection tube 1, and a pressure gauge 13 is arranged on the detection tube 1.

[0044] A collection pressure chamber is opened on the detection tube 1 to ensure that the collection chip on the pressure gauge 13 will not be damaged due to the detection tube 1 frequently entering and exiting the steel pipe 2 to be detected.

[0045] The first drain valve 8 is arranged at a position close to the fourth positioning ring 16, and the second drain valve is arranged at a position close to the second positioning ring 6.

[0046] The outer diameters of the first positioning ring 3, the second positioning ring 6, the third positioning ring 14, and the fourth positioning ring 16 are the same and are all smaller than the inner diameter of the steel pipe 2 to be detected, so that there will be no obstruction when the steel pipe 2 to be detected is sleeved outside the detection tube 1. After the steel pipe 2 to be detected is installed, the first air nozzles 5 arranged on the first airbag 4 and the second airbag 15 are externally connected to an air pump, and air is inflated into the first airbag 4 and the second airbag 15, causing both the first airbag 4 and the second airbag 15 to deform and expand and press against the inner wall of the steel pipe 2 to be detected. At this time, both ends of the gap between the steel pipe 2 to be detected and the detection tube 1 will be blocked. Subsequently, water is conveyed through the inlet valve 7 to the gap between the steel pipe 2 to be detected and the detection tube 1, and then the hydraulic pressure detection of the steel pipe 2 to be detected can be carried out. Finally, the water is discharged through the first drain valve 8 or the second drain valve.

[0047] An exhaust valve needs to be arranged on the detection tube 1. When injecting water into the gap between the detection tube 1 and the steel pipe 2 to be detected, the gas between the detection tube 1 and the steel pipe 2 to be detected can be discharged through the exhaust valve (this is a common technical means for those skilled in the art and will not be elaborated here).

[0048] As a preferred embodiment of the present invention, a water tank 9 is arranged inside the detection tube 1. A water pump 10 is arranged at the top of the water tank 9. The output end of the water pump 10 is fixedly connected to a water delivery pipe 11. The other end of the water delivery pipe 11 is connected to the inlet valve 7. The input end of the water pump 10 is communicated with the water tank 9 through a hose. Outlet pipes 12 are fixedly connected to both the first drain valve 8 and the second drain valve, and the other ends of the two outlet pipes 12 both extend into the interior of the water tank 9.

[0049] Whether the water between the steel pipe 2 to be detected and the detection pipe 1 is discharged through the first drain valve 8 or the second drain valve, it will enter the interior of the water tank 9 through the water outlet pipe 12. When the first drain valve 8 or the second drain valve is not opened, the water between the steel pipe 2 to be detected and the detection pipe 1 cannot be discharged at this time, ensuring the process of water pressure detection.

[0050] The water pump 10 is started, the water in the water tank 9 is pumped out through the hose, and is sent into the inlet valve 7 through the water supply pipe 11 until it enters between the steel pipe 2 to be detected and the detection pipe 1, completing the water pressure test.

[0051] As a preferred embodiment of the present invention, a guide strip 22 is fixedly installed on the outer wall of the detection pipe 1, a third airbag 17 is slidably installed on the guide strip 22, a through air pipe 18 is provided on the third airbag 17, a first blocking ball 19 is rotatably installed inside the through air pipe 18, an air passage 21 is opened inside the first blocking ball 19, the air passage 21 is set to be L-shaped, and the air passage 21 communicates with the third airbag 17.

[0052] The guide strip 22 can limit the sliding trajectory of the third airbag 17. The top of the third airbag 17 is a deformed part, and the rest are made of hard materials. In order to ensure that the third airbag 17 will not deform when sliding, both ends of the through air pipe 18 extend out of the third airbag 17. When the third airbag 17 slides to the position of the second positioning ring 6, one end of the through air pipe 18 will insert into the second positioning ring 6 at this time. When the third airbag 17 slides into the fourth positioning ring 16, one end of the through air pipe 18 will insert into the fourth positioning ring 16 at this time.

[0053] An air port is opened on the outer wall of the through air pipe 18, and the air port communicates with the inner cavity of the third airbag 17. One end of the L-shaped air passage 21 opened inside the first blocking ball 19 will always correspond to the air port, and the other end can be adjusted in position by rotation.

[0054] As a preferred embodiment of the present invention, a first delivery pipe 20 is fixedly installed inside the second positioning ring 6, a second delivery pipe 32 is fixedly installed inside the fourth positioning ring 16, and one end of the first delivery pipe 20 and the outer wall of the second delivery pipe 32 are both in contact with the inner wall of the through air pipe 18.

[0055] When the through air pipe 18 on the third airbag 17 inserts into the second positioning ring 6, one end of the through air pipe 18 will be inserted into the first delivery pipe 20 at this time. When the third airbag 17 slides in the direction of the fourth positioning ring 16 until the through air pipe 18 on the third airbag 17 is inserted into the second delivery pipe 32.

[0056] As a preferred embodiment of the present invention, a first gear 26 is fixedly installed at the bottom end of the first blocking ball 19 through a connecting shaft. A first toothed plate 27 is fixedly installed on the outer wall of the first conveying pipe 20, and a second toothed plate 33 is fixedly installed on the outer wall of the second conveying pipe 32. Both the first toothed plate 27 and the second toothed plate 33 are meshed with the first gear 26.

[0057] When the third airbag 17 drives the through trachea 18 to slide towards the second positioning ring 6, at this time, the through trachea 18 will be inserted into the first conveying pipe 20. During the sliding, the first gear 26 will drive the first blocking ball 19 to rotate under the action of the first toothed plate 27, and one end of the air duct 21 will rotate towards the first conveying pipe 20. At this time, the first conveying pipe 20 will be communicated with the inner cavity of the through trachea 18. When the third airbag 17 drives the through trachea 18 away from the second positioning ring 6, the first blocking ball 19 will be driven to rotate under the cooperation of the first toothed plate 27 and the first gear 26, and one end of the air duct 21 will rotate to the inner wall of the through trachea 18, and at this time, the gas in the third airbag 17 will be blocked.

[0058] When the third airbag 17 drives the through trachea 18 to slide towards the fourth positioning ring 16, at this time, the through trachea 18 will be inserted into the second conveying pipe 32. During the sliding, the first gear 26 will drive the first blocking ball 19 to rotate under the action of the second toothed plate 33, and one end of the air duct 21 will rotate towards the second conveying pipe 32. At this time, the second conveying pipe 32 will be communicated with the inner cavity of the through trachea 18. When the third airbag 17 drives the through trachea 18 away from the fourth positioning ring 16, the first blocking ball 19 will be driven to rotate under the cooperation of the first toothed plate 27 and the second gear 31, and one end of the air duct 21 will rotate to the inner wall of the through trachea 18, and at this time, the gas in the third airbag 17 will be blocked.

[0059] As a preferred embodiment of the present invention, an air supply channel 23 is opened inside the guide bar 22. One end of the first conveying pipe 20 and one end of the second conveying pipe 32 both extend into the inside of the air supply channel 23. A second blocking ball 28 is rotatably installed inside the air supply channel 23. A through hole is opened on the second blocking ball 28. A second air nozzle 29 is fixedly installed on the outer wall of the second blocking ball 28. A second gear 31 is fixedly installed on the outer wall of the second air nozzle 29. A third toothed plate 30 is slidably installed inside the guide bar 22. The third toothed plate 30 is meshed with the second gear 31.

[0060] The through hole opened on the second blocking ball 28 is communicated with the inner cavity of the second air nozzle 29. Through the opened through hole, the air supply channel 23 can only supply air to the first conveying pipe 20 or the second conveying pipe 32 once.

[0061] When the through hole on the second blocking ball 28 is rotated towards the direction of the first delivery pipe 20, the gas entering through the second air nozzle 29 will then enter the first delivery pipe 20 through the air delivery channel 23. At this time, if the through pipe 18 is inserted into the first delivery pipe 20, the gas in the air delivery channel 23 will cause the third airbag 17 to expand until the gas inside the third airbag 17 is full. By continuously delivering gas, the third airbag 17 will be pushed towards the direction of the fourth positioning ring 16. And at this time, with the continuous delivery of gas, the third airbag 17 can be continuously pushed to slide by the air pressure. Then the water located between the steel pipe 2 to be detected and the detection pipe 1 will be pushed by the third airbag 17 and finally discharged into the water tank 9 through the first drain valve 8, which is convenient for utilization and can effectively reduce the waste of water resources.

[0062] On the contrary, when the third airbag 17 is in contact with the fourth positioning ring 16, the water between the steel pipe 2 to be detected and the detection pipe 1 can also be discharged. Only need to control the through hole on the second blocking ball 28 to rotate towards the direction of the second delivery pipe 32. At this time, the gas entering through the second air nozzle 29 will enter the second delivery pipe 32 through the air delivery channel 23. At this time, the gas in the air delivery channel 23 will cause the third airbag 17 to expand until the gas inside the third airbag 17 is full. By continuously delivering gas, the third airbag 17 will be pushed towards the direction of the second positioning ring 6. The third airbag 17 can be continuously pushed to slide by the air pressure. Then the water located between the steel pipe 2 to be detected and the detection pipe 1 will be pushed by the third airbag 17 and finally discharged into the water tank 9 through the second drain valve, which is convenient for utilization.

[0063] As a preferred embodiment of the present invention, one end of the third toothed plate 30 is fixedly connected with a first connecting rope 24. The other end of the first connecting rope 24 penetrates through the first delivery pipe 20 and is fixedly connected with one end of the through pipe 18. The other end of the third toothed plate 30 is fixedly connected with a second connecting rope 25. The second connecting rope 25 penetrates through the second delivery pipe 32 and is fixedly connected with the other end of the through pipe 18.

[0064] When the third airbag 17 drives the through pipe 18 to be inserted into the first delivery pipe 20, at this time, the second connecting rope 25 will pull the third toothed plate 30 to slide towards the direction of the second delivery pipe 32, which will drive the second gear 31 to rotate, so that the through hole on the second blocking ball 28 rotates towards the direction of the first delivery pipe 20. When the third airbag 17 drives the through pipe 18 to be inserted into the second delivery pipe 32, at this time, the first connecting rope 24 will pull the third toothed plate 30 to slide towards the direction of the first delivery pipe 20, which will drive the second gear 31 to rotate, so that the through hole on the second blocking ball 28 rotates towards the direction of the second delivery pipe 32.

[0065] As Figure 10 shown, a method for using a clamping device for a steel pipe hydrostatic testing machine die, this method uses the above-mentioned clamping device for a steel pipe hydrostatic testing machine die, and includes the following steps:

[0066] S1: First, sleuth the steel pipe 2 to be detected outside the detection pipe 1, convey gas to the first airbag 4 and the second airbag 15 through an air pump, and seal both ends of the steel pipe 2 to be detected and the detection pipe 1.

[0067] S2: Secondly, then pump the water in the water tank 9 into the space between the steel pipe 2 to be detected and the detection pipe 1 through the water pump 10, and then by observing the pressure gauge 13, the hydrostatic test of the steel pipe 2 to be detected can be completed.

[0068] S3: Finally, convey gas into the through gas pipe 18 through the guide bar 22 to expand the third airbag 17 to fit the inner wall of the steel pipe 2 to be detected, and then control the rotation of the first blocking ball 19 to block the third airbag 17. At this time, the gas discharged through the guide bar 22 will push the third airbag 17 to slide, and squeeze the water between the steel pipe 2 to be detected and the detection pipe 1 into the water tank 9.

[0069] Working principle: When sleuth the steel pipe 2 to be detected outside the detection pipe 1, externally connect the first air nozzles 5 provided on the first airbag 4 and the second airbag 15 to an air pump, and inflate the first airbag 4 and the second airbag 15 to make both the first airbag 4 and the second airbag 15 deform and expand, and press against the inner wall of the steel pipe 2 to be detected. At this time, both ends of the gap between the steel pipe 2 to be detected and the detection pipe 1 will be blocked. Subsequently, water is conveyed into the gap between the steel pipe 2 to be detected and the detection pipe 1 through the water inlet valve 7, and the hydrostatic test of the steel pipe 2 to be detected can be carried out.

[0070] When the through gas pipe 18 is inserted into the first delivery pipe 20, the first gear 26 will drive the first blocking ball 19 to rotate under the action of the first toothed plate 27, and turn one end of the air passage 21 towards the first delivery pipe 20. At this time, the first delivery pipe 20 will be connected to the inner cavity of the through gas pipe 18. When the through hole on the second blocking ball 28 is rotated to the direction of the first delivery pipe 20, the gas entering through the second air nozzle 29 will enter the first delivery pipe 20 through the air delivery channel 23, so that the third airbag 17 expands and fits the inner wall of the steel pipe 2 to be detected until the air pressure slides the third airbag 17 towards the direction of the fourth positioning ring 16. The first toothed plate 27 and the first gear 26 will make the first blocking ball 19 block the third airbag 17. By pushing the third airbag 17 to slide with air pressure, the water between the steel pipe 2 to be detected and the detection pipe 1 can be discharged through the first drain valve 8 and flow into the water tank 9 under the action of the water outlet pipe 12, which is convenient for utilization and can effectively reduce the waste of water resources.

[0071] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. Taking the perspective of the observer as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0072] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping device for a steel pipe hydraulic testing machine mold, characterized in that: It comprises a detection tube (1) for testing a steel tube (2) to be detected, wherein a first positioning component and a second positioning component are arranged on the detection tube (1), and the first positioning component and the second positioning component are symmetrically arranged at two ends of the detection tube (1); The first positioning assembly comprises a first positioning ring (3), a second positioning ring (6) and a first airbag (4); the first positioning ring (3) and the second positioning ring (6) are both fixedly mounted on the outer wall of the detection tube (1); and the first airbag (4) is fixedly mounted between the first positioning ring (3) and the second positioning ring (6); The second positioning assembly comprises a third positioning ring (14), a fourth positioning ring (16) and a second airbag (15); the third positioning ring (14) and the fourth positioning ring (16) are both fixedly mounted on the outer wall of the detection tube (1); and the second airbag (15) is arranged between the third positioning ring (14) and the fourth positioning ring (16); The first airbag (4) and the second airbag (15) are both provided with a first air nozzle (5); The detection tube (1) is provided with a water inlet valve (7), a first water discharge valve (8) and a second water discharge valve, and the detection tube (1) is provided with a pressure gauge (13).

2. A clamping device for a steel pipe hydraulic testing machine mold according to claim 1, characterized in that: A water tank (9) is arranged inside the detection tube (1), a water pump (10) is arranged at the top of the water tank (9), the output end of the water pump (10) is fixedly connected to a water supply pipe (11), the other end of the water supply pipe (11) is connected to a water inlet valve (7), the input end of the water pump (10) is connected to the water tank (9) through a hose, the first drain valve (8) and the second drain valve are both fixedly connected to a water outlet pipe (12), the other ends of the two water outlet pipes (12) extend to the inside of the water tank (9).

3. A clamping device for a steel pipe hydraulic testing machine mold according to claim 2, characterized in that: A guide strip (22) is fixedly mounted on the outer wall of the detection tube (1), a third airbag (17) is slidably mounted on the guide strip (22), a through-trachea (18) is arranged on the third airbag (17), a first blocking ball (19) is rotatably mounted inside the through-trachea (18), an airway (21) is provided inside the first blocking ball (19), the airway (21) is arranged in an L-shape, and the airway (21) is connected to the third airbag (17).

4. A clamping device for a steel pipe hydraulic testing machine mold according to claim 3, characterized in that: A first delivery pipe (20) is fixedly installed inside the second positioning ring (6), and a second delivery pipe (32) is fixedly installed inside the fourth positioning ring (16); one end of the first delivery pipe (20) and the outer wall of the second delivery pipe (32) are both in contact with the inner wall of the air pipe (18).

5. A clamping device for a steel pipe hydraulic testing machine mold according to claim 4, characterized in that: A first gear (26) is fixedly mounted on the bottom end of the first blocking ball (19) via a connecting shaft, a first toothed plate (27) is fixedly mounted on the outer wall of the first conveying pipe (20), and a second toothed plate (33) is fixedly mounted on the outer wall of the second conveying pipe (32), and both the first toothed plate (27) and the second toothed plate (33) are meshed with the first gear (26).

6. A clamping device for a steel pipe hydraulic testing machine mold according to claim 5, characterized in that: An air supply channel (23) is provided inside the guide bar (22), one end of the first delivery pipe (20) and one end of the second delivery pipe (32) both extend into the air supply channel (23), a second blocking ball (28) is rotatably mounted inside the air supply channel (23), and a through opening is provided on the second blocking ball (28).

7. A clamping device for a steel pipe hydraulic testing machine mold according to claim 6, characterized in that: A second air nozzle (29) is fixedly mounted on the outer wall of the second blocking ball (28), a second gear (31) is fixedly mounted on the outer wall of the second air nozzle (29), a third toothed plate (30) is slidably mounted inside the guide bar (22), and the third toothed plate (30) is meshed with the second gear (31).

8. The clamping device for a steel pipe hydraulic testing machine mold according to claim 7, characterized in that: One end of the third tooth plate (30) is fixedly connected to a first connecting rope (24), the other end of the first connecting rope (24) passes through the first delivery pipe (20) and is fixedly connected to one end passing through the air pipe (18), and the other end of the third tooth plate (30) is fixedly connected to a second connecting rope (25), the second connecting rope (25) passes through the second delivery pipe (32) and is fixedly connected to the other end passing through the air pipe (18).

9. A method for using a clamping device for a steel pipe hydraulic testing machine mold, the method using the clamping device for a steel pipe hydraulic testing machine mold as claimed in claim 8, characterized in that: The following steps are involved: S1: First, the steel pipe to be tested (2) is placed outside the detection tube (1), and gas is delivered to the first air bag (4) and the second air bag (15) by an air pump to seal the two ends of the steel pipe to be tested (2) and the detection tube (1); S2: Secondly, the water in the water tank (9) is pumped into the space between the steel pipe to be tested (2) and the test pipe (1) through the water pump (10), and then the water pressure test of the steel pipe to be tested (2) is completed by observing the pressure gauge (13); S3: Finally, gas is sent into the air pipe (18) through the guide strip (22), so that the third airbag (17) expands and fits with the inner wall of the steel pipe to be tested (2), and then the first blocking ball (19) is controlled to rotate to block the third airbag (17). At this time, the gas discharged from the guide strip (22) will push the third airbag (17) to slide, and squeeze the water between the steel pipe to be tested (2) and the test tube (1) into the water tank (9).

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