A pipe rapid crack resistance test device

Abstract

The present invention belongs to the technical field of pipe crack test, and specifically refers to a pipe rapid crack resistance test device, including a test bench, a positioning frame, a driving cylinder, a pressure-holding crack detection mechanism and a punching strength detection mechanism, wherein the driving cylinder is symmetrically arranged at both ends of the test bench, the positioning frame is arranged between the bottom side walls of the driving cylinder, the pressure-holding crack detection mechanism is arranged on the driving cylinder, the punching strength detection mechanism is arranged on the side wall of the test bench, and the pressure-holding crack detection mechanism includes a holding and driving mechanism, a diameter expansion mechanism, an exhaust mechanism, a pressure regulating mechanism and a lubrication mechanism. The present invention provides a pipe rapid crack resistance test device that can integrate a pressure-holding test with an instantaneous pressure test, and can detect the strength of the pipe after the diameter expansion crack test.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe crack testing, and in particular relates to a pipe rapid crack resistance testing device. Background Art

[0002] The pipe rapid crack resistance test device is a device specially used to test the crack or expansion performance of pipes under load. This device is widely used in the pipe manufacturing industry, especially in the fields of petrochemical and chemical industries.

[0003] The existing crack test devices have the following problems:

[0004] The existing pipe crack test device does not have the ability to test the crack state of the pipe under continuous pressure and instantaneous impact pressure, and the traditional crack test device also does not have the ability to detect the strength of the expanded pipe after the expansion crack test, which reduces the use efficiency of the crack test device. Therefore, it cannot meet the existing use needs of the crack test device. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a pipe rapid crack resistance testing device which can integrate the sustained pressure test and the instantaneous pressure test and can detect the strength of the pipe after the expansion crack test.

[0006] The technical scheme adopted in this scheme is as follows: A pipe rapid crack resistance test device proposed in this scheme includes a test bench, a positioning frame, a driving cylinder, a pressure-holding type crack measuring mechanism and a stamping type strength measuring mechanism. The driving cylinder is symmetrically arranged at both ends of the test bench, the positioning frame is arranged between the bottom side walls of the driving cylinder, the pressure-holding type crack measuring mechanism is arranged on the driving cylinder, and the stamping type strength measuring mechanism is arranged on the side wall of the test bench. The pressure-holding type crack measuring mechanism includes a holding and driving mechanism, an expanding mechanism, an exhaust mechanism, a pressure regulating mechanism and a lubricating mechanism. The holding and driving mechanism is arranged on the upper wall of the driving cylinder, the expanding mechanism is arranged on the holding and driving mechanism, the exhaust mechanism is arranged on the test bench, the pressure regulating mechanism is arranged on the bottom side wall of the test bench, the lubricating mechanism is arranged on the expanding mechanism, and the stamping type strength measuring mechanism includes a suspension mechanism and a force adding mechanism. The suspension mechanism is arranged inside the driving cylinder below the holding and driving mechanism, and the force adding mechanism is arranged on the side of the test bench away from the pressure regulating mechanism.

[0007] As a further preferred embodiment of the present invention, the holding and driving mechanism includes a hydraulic cylinder, a lifting groove and a sliding block, the hydraulic cylinder is arranged through the upper inner wall of the driving cylinder, a plurality of lifting grooves are arranged on the upper side wall of the driving cylinder, the lifting grooves are arranged through, and the sliding block is slidably arranged on the inner wall of the lifting groove; the diameter expansion mechanism includes a pressure frame, an expansion shaft and a tube diameter shaft, the pressure frame is arranged between the sliding blocks, the expansion shaft is arranged on the bottom wall of the pressure frame, and the tube diameter shaft is arranged on the bottom wall of the test bench; the exhaust mechanism includes a guide pipe, an exhaust port, an exhaust pipe, a one-way exhaust valve, a groove and a rubber pad, the guide pipe penetrates the pressure frame, the expansion shaft and the tube diameter shaft and is arranged on the bottom wall of the test bench, the exhaust pipe penetrates the test bench and is connected to the bottom of the guide pipe, the exhaust port is arranged at one end of the guide pipe close to the exhaust pipe, the one-way exhaust valve is connected to the end of the exhaust pipe away from the guide pipe, the groove is arranged on the bottom wall of the test bench outside the guide pipe, the groove is opened at the upper end, and the rubber pad The bottom wall of the test bench is arranged on the outside of the groove, and the inner diameter of the rubber pad is consistent with the outer diameter of the groove; the pressure regulating mechanism includes a pressure regulating cylinder, a pressure regulating pipe, a pressure regulating valve, a positioning port and a pressure sensor, the pressure regulating cylinder is arranged on the side wall of the test bench on the side of the one-way exhaust valve, the pressure regulating pipe is connected between the pressure regulating cylinder and the exhaust pipe, the pressure regulating valve is connected on the side of the pressure regulating cylinder away from the test bench, multiple groups of positioning ports are arranged on the side wall of the positioning frame, the pressure sensor is arranged on the bottom wall of the exhaust pipe, and the power end of the pressure sensor is arranged inside the exhaust pipe; the lubrication mechanism includes a lubrication groove, a lubrication electromagnet, a lubrication magnetic plate, a lubrication cotton layer and a lubrication spring, the lubrication groove is arranged on the bottom wall of the pressure frame, the lubrication groove is opened at the lower end, multiple groups of lubrication electromagnets are arranged on the upper wall of the lubrication groove, the lubrication magnetic plate is slidably arranged on the inner wall of the lubrication groove below the lubrication electromagnet, the lubrication cotton layer is arranged on the bottom wall of the lubrication magnetic plate, and multiple groups of lubrication springs are arranged between the lubrication magnetic plate and the upper wall of the lubrication groove.

[0008] When in use, holes are punched in the bottom side wall of the pipe to be tested in advance, the holes in the side wall of the pipe correspond to the positioning holes on the side wall of the positioning frame, the pressure frame is lifted, and the pressure frame slides up along the lifting groove through the slider, the pipe passes through the positioning frame and enters the groove for placement, the guide tube is inserted into the pipe, and the positioning hole is connected to the hole on the side wall of the pipe by a latch, the pipe is fixed between the positioning frame and the groove, the rubber pad fits tightly against the side wall of the pipe surface, the bottom of the pipe is sealed, the pressure frame is released, and the pressure frame drives the slider to slide down along the lifting groove under its own gravity, the pressure frame drives the diameter expansion shaft to fit against the upper wall of the pipe, and the diameter expansion shaft drives the pipe diameter The shaft enters the pipe, and the outer diameter of the pipe shaft is consistent with the inner diameter of the pipe. Then the power end of the hydraulic cylinder extends and fits with the slider. The power end of the hydraulic cylinder pushes the pressure frame through the slider, and the pressure frame drives the expansion shaft to expand the upper part of the pipe. The expansion shaft and the pipe shaft slide down along the inner wall of the pipe, and the gas inside the pipe is squeezed into the guide pipe through the exhaust port. The gas inside the guide pipe flows out under the unidirectional conduction of the one-way exhaust valve. The pressure regulating valve is in a closed state, and the outside gas cannot enter the exhaust pipe and the guide pipe. When cracks appear at the expanded part of the pipe, stop expanding the pipe and take out the broken pipe.

[0009] Preferably, the lifting mechanism includes a lifting electromagnet and a rising magnet, the lifting electromagnet is arranged on the bottom wall of the driving cylinder, the rising magnet is arranged on the bottom wall of the slider, and the lifting electromagnet and the rising magnet are arranged opposite to each other; the force-adding mechanism includes a spray frame, a pulse generator and a pulse tube, the spray frame is arranged on the upper wall of the pressure frame, the pulse generator is arranged on the side of the test bench away from the pressure regulating cylinder, the pulse tube is arranged at the power end of the pulse generator, and the end of the pulse tube away from the pulse generator is arranged above the spray frame.

[0010] When in use, the lifting electromagnet is energized to generate magnetism. The lifting electromagnet and the rising magnet are set with the same pole. The lifting electromagnet is fixed at the bottom of the driving cylinder and pushes the rising magnet to rise through repulsion. The rising magnet drives the slider to slide and rise along the lifting groove. The slider drives the expansion shaft and the pipe diameter shaft away from the pipe through the pressure frame. Then the pulse generator sends out a pulse wave through the pulse tube to spray the force frame. The lifting electromagnet is powered off and demagnetized. Under the action of the pulse wave emitted by the pulse tube, the pressure frame drives the expansion shaft and the pipe diameter shaft to impact the pipe, so that the cracks generated in the pipe under the impact force can be tested. By changing the intensity of the pulse wave generated by the pulse generator, the cracking condition of the pipe under different impact forces can be tested.

[0011] Specifically, a controller is provided on the side wall of the test bench.

[0012] Wherein, the controller is electrically connected to the hydraulic cylinder, the pressure sensor, the suspension electromagnet and the pulse generator respectively.

[0013] The beneficial effects achieved by adopting the above structure are as follows:

[0014] Compared with the prior art, the present invention adopts a method that combines sustained pressure, instantaneous pressure and negative pressure. By setting up a sustained pressure crack detection mechanism and a punching type strength detection mechanism, with the coordinated use of a holding and driving mechanism, an expansion mechanism, an exhaust mechanism, a pressure regulating mechanism, a lubrication mechanism, a suspension mechanism and a force-adding mechanism, the present invention can detect cracks that are not noticeable to the naked eye after the pipe is expanded. At the same time, the strength of the pipe with thinned wall after expansion can also be detected to ensure the quality of the pipe when in use. Under the adsorption of negative pressure, the expansion shaft and the pipe diameter shaft can be prevented from rebounding and impacting the pipe again under the instantaneous pressure impact, thereby affecting the test results of the pipe under the instantaneous pressure impact, thereby ensuring the accuracy of the pipe test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0016] Figure 2 This is a bottom-up stereogram of the scheme;

[0017] Figure 3 This is a schematic diagram of the internal structure of this scheme;

[0018] Figure 4 for Figure 3 A bottom-up stereogram of

[0019] Figure 5 It is a structural schematic diagram of the lubrication mechanism;

[0020] Figure 6 This is the main view of this scheme;

[0021] Figure 7 This is the rear view of this scheme;

[0022] Figure 8 This is a side view of the scheme;

[0023] Fig. 9 This is a top view of the scheme;

[0024] Fig.10 for Figure 6 AA section view of the part;

[0025] Fig.11 for Figure 3 Part I shows a magnified structural view.

[0026] Among them, 1. test bench, 2. positioning frame, 3. driving cylinder, 4. pressure-holding crack detection mechanism, 5. holding and driving mechanism, 6. hydraulic cylinder, 7. lifting groove, 8. slider, 9. diameter expansion mechanism, 10. pressure frame, 11. diameter expansion shaft, 12. pipe diameter shaft, 13. exhaust mechanism, 14. guide pipe, 15. exhaust port, 16. exhaust pipe, 17. one-way exhaust valve, 18. groove, 19. rubber pad, 20. pressure regulating mechanism, 21. pressure regulating cylinder, 2 2. Pressure regulating pipe, 23. Pressure regulating valve, 24. Positioning port, 25. Lubrication mechanism, 26. Lubrication groove, 27. Lubrication electromagnet, 28. Lubrication magnetic plate, 29. Lubrication cotton layer, 30. Lubrication spring, 31. Stamping type strength measurement mechanism, 32. Suspension mechanism, 33. Suspension electromagnet, 34. Lifting magnet, 35. Force adding mechanism, 36. Spray frame, 37. Pulse generator, 38. Pulse tube, 39. Controller, 40. Pressure sensor.

[0027] The accompanying drawings are used to provide further understanding of the present scheme and constitute a part of the specification. Together with the embodiments of the present scheme, they are used to explain the present scheme and do not constitute a limitation on the present scheme. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the present scheme will be clearly and completely described below in conjunction with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only part of the embodiments of the present scheme, not all of the embodiments; based on the embodiments in the present scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present scheme.

[0029] In the description of this scheme, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this scheme.

[0030] like Figure 1-Figure 11As shown, a pipe rapid crack resistance test device proposed in this scheme includes a test bench 1, a positioning frame 2, a driving cylinder 3, a pressure-holding crack measuring mechanism 4 and a punching strength measuring mechanism 31. The driving cylinder 3 is symmetrically arranged at both ends of the test bench 1, the positioning frame 2 is arranged between the bottom side walls of the driving cylinder 3, the pressure-holding crack measuring mechanism 4 is arranged on the driving cylinder 3, and the punching strength measuring mechanism 31 is arranged on the side wall of the test bench 1. The pressure-holding crack measuring mechanism 4 includes a holding and driving mechanism 5, a diameter expansion mechanism 9, an exhaust mechanism 13, and a pressure regulating mechanism 20. and a lubricating mechanism 25, the holding and driving mechanism 5 is arranged on the upper wall of the driving cylinder 3, the expanding mechanism 9 is arranged on the holding and driving mechanism 5, the exhaust mechanism 13 is arranged on the test bench 1, the pressure regulating mechanism 20 is arranged on the bottom side wall of the test bench 1, the lubricating mechanism 25 is arranged on the expanding mechanism 9, the stamping type strength measuring mechanism 31 includes a suspension mechanism 32 and a force adding mechanism 35, the suspension mechanism 32 is arranged inside the driving cylinder 3 below the holding and driving mechanism 5, and the force adding mechanism 35 is arranged on the side of the test bench 1 away from the pressure regulating mechanism 20.

[0031] The holding and driving mechanism 5 includes a hydraulic cylinder 6, a lifting groove 7 and a slider 8. The hydraulic cylinder 6 is arranged through the upper inner wall of the driving cylinder 3. Multiple groups of lifting grooves 7 are arranged on the upper side wall of the driving cylinder 3. The lifting grooves 7 are arranged through, and the slider 8 is slidably arranged on the inner wall of the lifting groove 7; the diameter expansion mechanism 9 includes a pressure frame 10, a diameter expansion shaft 11 and a pipe diameter shaft 12. The pressure frame 10 is arranged between the sliders 8, the diameter expansion shaft 11 is arranged on the bottom wall of the pressure frame 10, and the pipe diameter shaft 12 is arranged on the bottom wall of the test bench 1; the exhaust mechanism 13 includes a guide pipe 14, an exhaust port 15, an exhaust pipe 16, a one-way exhaust valve 17, a groove 18 and a rubber pad 19, the guide tube 14 passes through the pressure frame 10, the expansion shaft 11 and the tube diameter shaft 12 and is arranged on the bottom wall of the test bench 1, the exhaust pipe 16 passes through the test bench 1 and is connected to the bottom of the guide tube 14, the exhaust port 15 is arranged at one end of the guide tube 14 close to the exhaust pipe 16, the one-way exhaust valve 17 is connected to the end of the exhaust pipe 16 away from the guide tube 14, the groove 18 is arranged on the bottom wall of the test bench 1 outside the guide tube 14, the groove 18 is opened at the upper end, and the rubber pad 19 is arranged on the test bench 1 outside the groove 18. The bottom wall of the test bench 1, the inner diameter of the rubber pad 19 is consistent with the outer diameter of the groove 18; the pressure regulating mechanism 20 includes a pressure regulating cylinder 21, a pressure regulating pipe 22, a pressure regulating valve 23, a positioning port 24 and a pressure sensor 40, the pressure regulating cylinder 21 is arranged on the side wall of the test bench 1 on the side of the one-way exhaust valve 17, the pressure regulating pipe 22 is connected between the pressure regulating cylinder 21 and the exhaust pipe 16, the pressure regulating valve 23 is connected to the side of the pressure regulating cylinder 21 away from the test bench 1, multiple groups of the positioning ports 24 are arranged on the side wall of the positioning frame 2, the pressure sensor 40 is arranged on the bottom wall of the exhaust pipe 16, and the pressure sensor 40 is movable The force end is arranged inside the exhaust pipe 16; the lubrication mechanism 25 includes a lubrication groove 26, a lubrication electromagnet 27, a lubrication magnetic plate 28, a lubrication cotton layer 29 and a lubrication spring 30, the lubrication groove 26 is arranged on the bottom wall of the pressure frame 10, the lubrication groove 26 is opened at the lower end, multiple groups of lubrication electromagnets 27 are arranged on the upper wall of the lubrication groove 26, the lubrication magnetic plate 28 is slidably arranged on the inner wall of the lubrication groove 26 below the lubrication electromagnet 27, the lubrication cotton layer 29 is arranged on the bottom wall of the lubrication magnetic plate 28, and multiple groups of lubrication springs 30 are arranged between the lubrication magnetic plate 28 and the upper wall of the lubrication groove 26.

[0032] The lifting mechanism 32 includes a lifting electromagnet 33 and a lifting magnet 34. The lifting electromagnet 33 is arranged on the bottom wall of the driving cylinder 3, and the lifting magnet 34 is arranged on the bottom wall of the slider 8. The lifting electromagnet 33 and the lifting magnet 34 are arranged opposite to each other; the force-adding mechanism 35 includes a spray frame 36, a pulse generator 37 and a pulse tube 38. The spray frame 36 is arranged on the upper wall of the pressure frame 10, and the pulse generator 37 is arranged on the side of the test bench 1 away from the pressure regulating cylinder 21. The pulse tube 38 is arranged at the power end of the pulse generator 37, and the end of the pulse tube 38 away from the pulse generator 37 is arranged above the spray frame 36.

[0033] A controller 39 is disposed on the side wall of the test bench 1 .

[0034] The controller 39 is electrically connected to the hydraulic cylinder 6 , the pressure sensor 40 , the suspension electromagnet 33 and the pulse generator 37 , respectively.

[0035] In specific use, in the first embodiment, a hole is punched in advance on the bottom side wall of the pipe to be tested, and the hole on the side wall of the pipe corresponds to the positioning opening 24 on the side wall of the positioning frame 2;

[0036] The controller 39 controls the lifting electromagnet 33 to start. The lifting electromagnet 33 and the lifting magnet 34 are set with the same pole. The lifting electromagnet 33 is fixed at the bottom of the driving cylinder 3 and pushes the lifting magnet 34 through the repulsive force. The lifting magnet 34 drives the pressure frame 10 to rise through the slider 8. The pressure frame 10 drives the expansion shaft 11 and the pipe diameter shaft 12 away from the guide tube 14, and the pipe is placed in the groove 18. The pipe passes through the positioning frame 2 and enters the groove 18. The guide tube 14 is inserted into the pipe, and the latch is used. The positioning port 24 is connected to the hole on the side wall of the pipe, the pipe is fixed between the positioning frame 2 and the groove 18, the rubber pad 19 is tightly fitted with the side wall of the pipe surface to seal the bottom of the pipe, the controller 39 controls the suspension electromagnet 33 to be powered off and demagnetized, the pressure frame 10 drives the slider 8 to slide down along the lifting groove 7 under its own gravity, the pressure frame 10 drives the expansion shaft 11 to fit with the upper wall of the pipe, the expansion shaft 11 drives the pipe diameter shaft 12 to enter the inside of the pipe, and the outer diameter of the pipe diameter shaft 12 is consistent with the inner diameter of the pipe;

[0037] Lubricating oil is injected into the lubricating cotton layer 29, and the lubricating cotton layer 29 changes from a dry state to a wet state. The lubricating electromagnet 27 is energized to generate magnetism. The lubricating electromagnet 27 and the lubricating magnetic plate 28 are arranged with the same polarity. The lubricating electromagnet 27 is fixed on the upper wall of the lubricating groove 26 and pushes the lubricating magnetic plate 28 through repulsion. The lubricating magnetic plate 28 drives the lubricating cotton layer 29 to slide along the side wall of the enlarged diameter shaft 11, and the lubricating cotton layer 29 applies the lubricating oil to the outer side of the enlarged diameter shaft 11;

[0038] The controller 39 controls the hydraulic cylinder 6 to start, and then the power end of the hydraulic cylinder 6 extends and fits with the slider 8. The power end of the hydraulic cylinder 6 pushes the pressure frame 10 through the slider 8, and the pressure frame 10 drives the diameter expansion shaft 11 to expand the upper part of the pipe. The diameter expansion shaft 11 and the pipe diameter shaft 12 slide down along the inner wall of the pipe, and the gas inside the pipe is squeezed into the guide pipe 14 through the exhaust port 15. The gas inside the guide pipe 14 flows out under the unidirectional conduction of the one-way exhaust valve 17. The pressure regulating valve 23 is in a closed state, and the outside gas cannot enter the exhaust pipe 16 and the guide pipe 14.

[0039] When cracks appear at the expanded part of the pipe, the controller 39 controls the hydraulic cylinder 6 to stop expanding the pipe, takes out the cracked pipe, observes and records the data, puts in a pipe of new material, and the power end of the hydraulic cylinder 6 extends to drive the expansion shaft 11 to expand the newly placed pipe. When no cracks appear at the newly placed pipe after the expansion operation, the controller 39 controls the power end of the hydraulic cylinder 6 to shorten, and the controller 39 controls the lifting electromagnet 33 to start. The controller 39 controls the current passing into the lifting electromagnet 33 to increase, and the repulsive magnetic field strength between the lifting electromagnet 33 and the lifting magnet 34 is enhanced, and the pressure frame 10 gradually draws the expansion shaft 11 and the pipe diameter shaft 12 out of the pipe.

[0040] Since the external gas cannot enter the guide tube 14 and the exhaust pipe 16, as the expansion axis 11 and the pipe diameter axis 12 continuously rise along the inner wall of the pipe, the pressure inside the pipe decreases, and the controller 39 controls the pressure rack 10 to start. The pressure rack 10 monitors the gas pressure inside the guide tube 14 and the exhaust pipe 16 and the pipe in real time through the detection end. When cracks that cannot be detected by the naked eye appear at the expansion part of the pipe, the overall strength of the pipe is weak. Under the operation of the external atmospheric pressure, the expansion part of the pipe that cannot be detected by the naked eye will appear concave deformation or external gas will enter through small cracks, increasing the internal pressure of the pipe, completing the test operation of the crack state of the pipe under continuous pressure;

[0041] By manually controlling the opening of the pressure regulating valve 23, the air pressure inside the pipe can be adjusted to ensure that the strength of the pipe after expansion is tested under the condition that the pipe itself can withstand the air pressure.

[0042] Embodiment 2: Based on the above embodiment, this embodiment tests the crack condition of the pipe under transient pressure, pulls out the pin from the inside of the pipe hole and the positioning port 24, replaces the new pipe, and the pressure frame 10 drives the expansion shaft 11 and the pipe diameter shaft 12 away from the guide pipe 14. The controller 39 controls the lifting electromagnet 33 to start, and the lifting electromagnet 33 is energized to generate magnetism. The lifting electromagnet 33 and the rising magnet 34 are arranged with the same pole. The lifting electromagnet 33 is fixed at the bottom of the driving cylinder 3 and pushes the rising magnet 34 to rise by repulsion. The rising magnet 34 drives the slider 8 to slide and rise along the lifting groove 7. The block 8 drives the expansion shaft 11 and the pipe diameter shaft 12 away from the pipe through the pressure frame 10. Then, the controller 39 controls the pulse generator 37 to start. The pulse generator 37 emits a pulse wave through the pulse tube 38 to spray toward the spray frame 36. The suspension electromagnet 33 is powered off and demagnetized. Under the action of the pulse wave emitted by the pulse tube 38, the pressure frame 10 drives the expansion shaft 11 and the pipe diameter shaft 12 to impact the pipe, thereby being able to test the cracks generated by the pipe under the impact force. By changing the intensity of the pulse wave generated by the pulse generator 37, the cracking of the pipe under different impact forces can be tested.

[0043] When the expansion shaft 11 and the tube shaft 12 impact the pipe under transient pressure, since the outer diameter of the tube shaft 12 is consistent with the inner diameter of the pipe, the negative pressure adsorption of the guide pipe 14 and the exhaust pipe 16 can prevent the expansion shaft 11 and the tube shaft 12 from rebounding, thereby ensuring that the expansion shaft 11 and the tube shaft 12 will not impact the pipe again, ensuring the authenticity of the crack state of the pipe under transient pressure impact; just repeat the above operation when using it next time.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The above is a description of the present solution and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the creative purpose of the present solution, they should all fall within the protection scope of the present solution.

Claims

1. A pipe rapid crack resistance test device, comprising a test bench (1), a positioning frame (2) and a driving cylinder (3), characterized in that: The invention also comprises a pressure-holding crack detection mechanism (4) and a punching strength detection mechanism (31), wherein the driving cylinder (3) is symmetrically arranged at both ends of the test bench (1), the positioning frame (2) is arranged between the bottom side walls of the driving cylinder (3), the pressure-holding crack detection mechanism (4) is arranged on the driving cylinder (3), the punching strength detection mechanism (31) is arranged on the side wall of the test bench (1), the pressure-holding crack detection mechanism (4) comprises a holding and driving mechanism (5), a diameter expansion mechanism (9), an exhaust mechanism (13), a pressure regulating mechanism (20) and a lubricating mechanism (25), the holding and driving mechanism (5) is arranged on the driving cylinder (3), and the pressure regulating mechanism (20) and the lubricating mechanism (25) are arranged on the driving cylinder (3). The cylinder (3) is provided with an upper wall thereof, the diameter expansion mechanism (9) is provided on the holding and driving mechanism (5), the exhaust mechanism (13) is provided on the test bench (1), the pressure regulating mechanism (20) is provided on the bottom side wall of the test bench (1), the lubricating mechanism (25) is provided on the diameter expansion mechanism (9), the punching type strength measuring mechanism (31) comprises a suspension mechanism (32) and a force applying mechanism (35), the suspension mechanism (32) is provided inside the driving cylinder (3) below the holding and driving mechanism (5), and the force applying mechanism (35) is provided on a side of the test bench (1) away from the pressure regulating mechanism (20); The holding and driving mechanism (5) comprises a hydraulic cylinder (6), a lifting groove (7) and a sliding block (8); the hydraulic cylinder (6) is arranged through the upper inner wall of the driving cylinder (3); a plurality of groups of the lifting grooves (7) are arranged on the upper side wall of the driving cylinder (3); the lifting grooves (7) are arranged through; and the sliding block (8) is slidably arranged on the inner wall of the lifting grooves (7); The diameter expansion mechanism (9) comprises a pressure frame (10), a diameter expansion shaft (11) and a pipe diameter shaft (12); the pressure frame (10) is arranged between the sliders (8); the diameter expansion shaft (11) is arranged on the bottom wall of the pressure frame (10); and the pipe diameter shaft (12) is arranged on the bottom wall of the test bench (1); The exhaust mechanism (13) comprises a guide tube (14), an exhaust port (15), an exhaust pipe (16), a one-way exhaust valve (17), a groove (18) and a rubber pad (19); the guide tube (14) passes through the pressure frame (10), the diameter expansion shaft (11) and the tube diameter shaft (12) and is arranged on the bottom wall of the test bench (1); the exhaust pipe (16) passes through the test bench (1) and is connected to the bottom of the guide tube (14); the exhaust port (15) is arranged at one end of the guide tube (14) close to the exhaust pipe (16); the one-way exhaust valve (17) is connected to one end of the exhaust pipe (16) away from the guide tube (14); the groove (18) is arranged on the bottom wall of the test bench (1) outside the guide tube (14); the groove (18) is opened at the upper end; the rubber pad (19) is arranged on the bottom wall of the test bench (1) outside the groove (18); the inner diameter of the rubber pad (19) is consistent with the outer diameter of the groove (18); The pressure regulating mechanism (20) comprises a pressure regulating cylinder (21), a pressure regulating pipe (22), a pressure regulating valve (23), a positioning port (24) and a pressure sensor (40); the pressure regulating cylinder (21) is arranged on the side wall of the test bench (1) on the side of the one-way exhaust valve (17); the pressure regulating pipe (22) is arranged between the pressure regulating cylinder (21) and the exhaust pipe (16); the pressure regulating valve (23) is arranged on the side of the pressure regulating cylinder (21) away from the test bench (1); a plurality of groups of the positioning ports (24) are arranged on the side wall of the positioning frame (2); the pressure sensor (40) is arranged on the bottom wall of the exhaust pipe (16); and the power end of the pressure sensor (40) is arranged to penetrate the inside of the exhaust pipe (16); The lubrication mechanism (25) comprises a lubrication groove (26), a lubrication electromagnet (27), a lubrication magnetic plate (28), a lubrication cotton layer (29) and a lubrication spring (30). The lubrication groove (26) is arranged on the bottom wall of the pressure frame (10), the lubrication groove (26) is arranged with an opening at the lower end, a plurality of groups of lubrication electromagnets (27) are arranged on the upper wall of the lubrication groove (26), the lubrication magnetic plate (28) is slidably arranged on the inner wall of the lubrication groove (26) below the lubrication electromagnet (27), the lubrication cotton layer (29) is arranged on the bottom wall of the lubrication magnetic plate (28), and a plurality of groups of lubrication springs (30) are arranged between the lubrication magnetic plate (28) and the upper wall of the lubrication groove (26).

2. A pipe rapid crack resistance test device according to claim 1, characterized in that: The suspension mechanism (32) comprises a suspension electromagnet (33) and a lifting magnet (34); the suspension electromagnet (33) is arranged on the bottom wall of the driving cylinder (3); the lifting magnet (34) is arranged on the bottom wall of the sliding block (8); the suspension electromagnet (33) and the lifting magnet (34) are arranged opposite to each other.

3. A pipe rapid crack resistance test device according to claim 2, characterized in that: The force-adding mechanism (35) comprises a force-adding frame (36), a pulse generator (37) and a pulse tube (38); the force-adding frame (36) is arranged on the upper wall of the pressure frame (10); the pulse generator (37) is arranged on a side of the test bench (1) away from the pressure regulating cylinder (21); the pulse tube (38) is arranged at the power end of the pulse generator (37); and one end of the pulse tube (38) away from the pulse generator (37) is arranged above the force-adding frame (36).

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