Seamless steel tube compression capacity detection device and detection method thereof

Abstract

The invention discloses a seamless steel pipe compression capacity detection device and a detection method thereof.The seamless steel pipe compression capacity detection device comprises a base and a supporting frame fixed to the top of the base, a lifting machine is fixed to the top of the supporting frame, and a lifting rod is fixed to the movable end of the lifting machine; a pressurizing mechanism capable of moving along the moving end of the elevator is arranged at the tail end of the lifting rod; the method for detecting the compression capacity of the seamless steel pipe comprises the steps of preparation work, sample installation, pressurization detection, data acquisition and analysis, judgment and feedback, recovery and maintenance and the like. Through cooperation of the hoister and the pressurizing mechanism, rapid positioning and pressure loading of the steel pipe are achieved, manual intervention is reduced in the automatic pressurizing and sealing process, the detection efficiency is improved, the automation degree of the detection process is high, seamless steel pipes can be detected in batches, and industrial production requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of seamless steel pipe detection, and in particular to a pressure bearing capacity detection device and a detection method for seamless steel pipe. Background Art

[0002] Seamless steel pipes are widely used in the fields of oil and gas transportation, chemical production, construction, automobile manufacturing, and mechanical equipment due to their no welds, high strength, and pressure resistance. In these fields, seamless steel pipes usually need to withstand large internal and external pressures and complex environments, so their pressure bearing capacity testing is particularly important. The pressure bearing capacity testing of seamless steel pipes is a key link in ensuring product quality and safety. Through precise testing, safety risks can be prevented, production efficiency can be improved, and new technology research and development can be supported to meet diverse market needs. For seamless steel pipe manufacturers, establishing a complete testing process is not only an important means to enhance brand reputation, but also a necessary guarantee for achieving technological progress and sustainable development.

[0003] However, the existing detection methods still have certain defects. For example, the existing detection devices mostly use single-point detection or low-precision monitoring methods, which makes it difficult to fully grasp the full surface deformation of the seamless steel pipe during the pressure process, which can easily lead to detection blind spots or misjudgments; traditional devices are usually operated manually, are inefficient, and cannot record and analyze detection data in real time, which limits the traceability and comprehensive utilization of the data; many devices are unevenly stressed during the pressurization process, which may cause damage to the sample or the device itself, affecting the safety of the detection, and other problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a pressure bearing capacity detection device and a detection method for a seamless steel pipe.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pressure bearing capacity detection device for seamless steel pipes comprises a base and a support frame fixed on the top of the base, a hoist is fixed on the top of the support frame, a lifting machine is fixed on the moving end of the lifting machine, a pressing mechanism which can move along the moving end of the lifting machine is arranged at the end of the lifting rod; a pressure detection mechanism is fixed on the top of the base, the pressure detection mechanism is arranged at the rear end of the pressing mechanism, the pressure detection mechanism comprises a first frame fixed on the top of the base, a cylinder fixed inside the first frame and a plurality of detection modules evenly arranged on the inner wall of the cylinder, the plurality of detection modules form a circular tubular structure, and can detect the surface deformation state of the pipe profile which is sleeved with the plurality of detection modules; a blocking mechanism which can block the rear end of the pressure detection mechanism is also fixed on the top of the base.

[0007] Preferably, the pressurizing mechanism includes a fixing frame fixed to the lifting rod, a plate body is fixed at the lower end of the fixing frame, a hollow structure is formed between the fixing frame and the plate body, a first electric cylinder is fixed at the hollow structure, a connecting rod is fixed to the acting end of the first electric cylinder, a bracket is fixed at the front end of the connecting rod, a first block is fixed to the lower end of the bracket, and a first gasket is fixed to the rear end of the first block.

[0008] Preferably, the pressurizing mechanism further comprises a pressurizing tube penetrating the first block and the first gasket, and a solenoid valve is arranged on the pressurizing tube; the pressurizing tube is located at the center of the first gasket.

[0009] Preferably, the detection module includes an end cover fixed to the inner wall of the cylinder, the end cover is fixed to one end of the circular tube, a pressure sensor is fixed on the side of the end cover facing the inside of the circular tube, a spring fixing part is fixed to the detection end of the pressure sensor, a spring is arranged in the spring fixing part, the end of the spring is fixed to the boss, and the end of the boss is fixed to the arc-shaped piece.

[0010] Preferably, a plurality of arc-shaped sheets in the same row form a circular ring structure, and a plurality of rows of arc-shaped sheets form a cylindrical structure.

[0011] Preferably, the sealing mechanism includes a second frame fixed on the top of the base and a cylindrical body fixed inside the second frame, a second electric cylinder is arranged inside the cylindrical body, a second block is fixed to the output shaft of the second electric cylinder, the second block is slidably arranged in the cylindrical body, and a second gasket is arranged on the side of the second block facing the outside of the cylindrical body.

[0012] Preferably, the first block and the second block are both cylindrical structures, and in the detection state, the axis lines of the first block, the second block, the cylinder, the first gasket and the second gasket coincide with each other.

[0013] Preferably, the pressurizing mechanism further comprises a plurality of slide bars arranged at the upper end of the bracket, and the slide bars slide through the plate body and extend to the rear end of the plate body.

[0014] Preferably, the central axis of the spring fixing member and the circular tube body coincide with each other, and the outer diameter of the spring fixing member is smaller than the inner diameter of the circular tube body.

[0015] In order to solve the above technical problems, the present invention also proposes a method for detecting the pressure bearing capacity of a seamless steel pipe. Based on a seamless steel pipe pressure bearing capacity detection device, the method for detecting the pressure bearing capacity of a seamless steel pipe comprises the following steps:

[0016] S1. Preparation, equipment inspection: confirm that all parts of the device are in normal condition; check whether the connection between the pressure pipe and the high-pressure air pump is stable, and whether the solenoid valve can control the gas flow normally; sample preparation: ensure that the size of the seamless steel pipe to be tested meets the test requirements and has no obvious cracks or deformation; clean the surface and inner cavity of the steel pipe to ensure that there are no impurities;

[0017] S2. Sample installation and steel pipe placement: insert the seamless steel pipe into the cylinder of the pressure detection mechanism, align the axis of the steel pipe with the central axis of the cylinder; adjust the position of the steel pipe so that its front and rear ends are respectively connected with the first gasket and the second gasket, and ensure sealing; block the port: start the blocking mechanism, push the second block through the second electric cylinder, and firmly press the second gasket against the rear end of the seamless steel pipe; ensure that the blocking mechanism and the pressurizing mechanism jointly form a sealed pressure environment;

[0018] S3, pressurization detection, start pressurization: start the high-pressure air pump to deliver high-pressure gas to the seamless steel pipe through the pressurization pipe; adjust the solenoid valve to control the gas delivery rate and pressure increase; continue pressurization: control the position of the pressurization mechanism through the hoist to ensure that the first gasket stably seals the front end of the steel pipe, and monitor the pressure change at the same time; monitor deformation: when the seamless steel pipe is deformed under pressure, the detection module in the cylinder captures the deformation information; the pressure sensor at the deformation point transmits the detected pressure signal to the connected computer in real time for processing;

[0019] S4. Data collection and analysis, data recording: record the pressure data and deformation transmitted by the pressure sensor in real time through the computer; generate the pressure capacity distribution diagram and deformation trend diagram according to the deformation degree at different positions of the seamless steel pipe; analysis results: evaluate the pressure capacity of the steel pipe in combination with the test data to determine whether it meets the design requirements or has deformed beyond the allowable range;

[0020] S5. Judgment and feedback, result judgment: if the test data is within the allowable range, the steel pipe is judged to be qualified; if the pressure at certain positions is abnormal, the seamless steel pipe is judged to have defects, and the specific position and related data are recorded; feedback adjustment: according to the abnormal situation in the test, adjust the parameters of the test device or retest;

[0021] S6. Recovery and maintenance, pressure relief and disassembly: turn off the high-pressure air pump, slowly release the high-pressure gas in the steel pipe through the solenoid valve, and take out the seamless steel pipe after ensuring safety; stop the sealing mechanism and the pressurizing mechanism, and release the seals at both ends of the steel pipe; equipment cleaning and maintenance: clean the pressurized pipe, cylinder and detection module, and check whether the equipment is damaged or needs maintenance.

[0022] The present invention has the following beneficial effects:

[0023] 1. The present invention realizes rapid positioning and pressure loading of steel pipes through the cooperation of the hoist and the pressurizing mechanism. The automated pressurizing and sealing process reduces manual intervention and improves detection efficiency. The detection process has a high degree of automation and can detect seamless steel pipes in batches, which is suitable for industrial production needs.

[0024] 2. The pressure sensor configured in the detection module of the present invention can monitor the surface deformation and stress state of the seamless steel pipe in real time, ensuring the accuracy and real-time nature of the data. By connecting the pressure sensor to the computer, the detection data can be automatically collected and processed, avoiding the errors of traditional manual recording and achieving higher accuracy.

[0025] 3. The present invention can simultaneously detect the deformation of multiple points on the surface of the steel pipe through multiple rows of arc-shaped sheets and pressure sensors, providing rich data for subsequent mechanical performance analysis. The computer system can conduct a comprehensive analysis of the data collected by multiple sensors to form a detailed force distribution diagram, which is convenient for evaluating the overall performance of the steel pipe.

[0026] 4. The present invention can simultaneously detect the deformation of multiple points on the surface of the steel pipe through multiple rows of arc-shaped sheets and pressure sensors, providing rich data for subsequent mechanical performance analysis. The computer system can conduct a comprehensive analysis of the data collected by multiple sensors to form a detailed force distribution diagram, which is convenient for evaluating the overall performance of the steel pipe.

[0027] 5. The pressurized pipe provided in the present invention controls the precise loading of pressure through the solenoid valve, which can gradually increase the pressure in the pipe to the limit value, and is used to test the bursting pressure of the steel pipe. It is suitable for evaluating the safety factor and design margin of the steel pipe to ensure that it can meet the use requirements in harsh environments.

[0028] 6. The detection module provided in the present invention is a cylindrical structure composed of multiple arc-shaped pieces, which can be flexibly adjusted according to the specifications of the steel pipe, adapted to seamless steel pipes of different diameters, and can be applied to the detection of seamless steel pipes of different models and sizes, thereby expanding the scope of application of the device and method. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is one of the schematic diagrams of the pressurizing mechanism structure of the present invention;

[0031] Figure 3 This is the second structural schematic diagram of the pressurizing mechanism of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the pressure detection mechanism of the present invention;

[0033] Figure 5 It is a schematic cross-sectional structure diagram of the pressure detection mechanism of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the detection module of the present invention;

[0035] Figure 7 This is a schematic diagram of the explosion structure of the detection module of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the blocking mechanism of the present invention;

[0037] Fig. 9 It is a schematic diagram of the cross-sectional structure of the blocking mechanism of the present invention;

[0038] Fig.10 The present invention is a flow chart of the detection method.

[0039] In the figure: 1, base; 2, support frame; 3, hoist; 4, lifting rod; 5, pressurizing mechanism; 501, plate; 502, fixing frame; 503, sliding rod; 504, first electric cylinder; 505, connecting rod; 506, bracket; 507, first block; 508, first gasket; 509, pressurizing pipe; 510, solenoid valve; 6, pressure detection mechanism; 601, first frame; 602, cylinder; 603, detection module; 603a, circular tube; 603b, end cover; 603c, pressure sensor; 603d, spring fixing piece; 603e, spring; 603f, boss; 603g, arc sheet; 7, blocking mechanism; 701, second frame; 702, cylindrical body; 703, second electric cylinder; 704, second block; 705, second gasket. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Reference Figure 1 - Fig. 9 A device for detecting the pressure bearing capacity of a seamless steel pipe and a detection method thereof, comprising a base 1 and a support frame 2 fixed on the top of the base 1, a hoist 3 fixed on the top of the support frame 2, a lifting machine 3 fixed on the moving end of the lifting machine 3, a lifting rod 4 fixed on the end of the lifting rod 4, a pressurizing mechanism 5 which can move along the moving end of the lifting machine 3; a pressure detection mechanism 6 fixed on the top of the base 1, the pressure detection mechanism 6 is arranged at the rear end of the pressurizing mechanism 5, the pressure detection mechanism 6 comprises a first frame 601 fixed on the top of the base 1, a cylinder 602 fixed inside the first frame 601 and a plurality of detection modules 603 evenly arranged on the inner wall of the cylinder 602, the plurality of detection modules 603 form a circular tubular structure, and can detect the surface deformation state of the pipe profile sleeved with the plurality of detection modules 603; a blocking mechanism 7 which can block the rear end of the pressure detection mechanism 6 is also fixed on the top of the base 1.

[0042] In this embodiment, when inspecting the seamless steel pipe, the pressurizing mechanism 5 is lifted by the hoist 3, and then the seamless steel pipe is inserted into the pressure detection mechanism 6, and finally the pressurizing mechanism 5 is lowered to a suitable position by the hoist 3, and then the front end of the seamless steel pipe is sealed by the pressurizing mechanism 5, and the rear end of the seamless steel pipe is sealed by the sealing mechanism 7, and then the pressurizing mechanism 5 is externally connected to a high-pressure air pump, and high air pressure is injected into the seamless steel pipe through the high-pressure air pump, and the seamless steel pipe is inspected by the pressure detection mechanism 6. When deformation of the surface of the seamless steel pipe is detected, it is proved that the pressure is the threshold value that the seamless steel pipe being inspected can withstand.

[0043] In the present invention, the pressurizing mechanism 5 includes a fixing frame 502 fixed to the lifting rod 4, a plate body 501 is fixed to the lower end of the fixing frame 502, a hollow structure is formed between the fixing frame 502 and the plate body 501, a first electric cylinder 504 is fixed at the hollow structure, a connecting rod 505 is fixed to the acting end of the first electric cylinder 504, a bracket 506 is fixed to the front end of the connecting rod 505, a first block 507 is fixed to the lower end of the bracket 506, and a first gasket 508 is fixed to the rear end of the first block 507.

[0044] In this embodiment, the first electric cylinder 504 can drive the first block 507 to move forward and backward, so that the front end of the steel pipe is sealed by the first gasket 508 .

[0045] In the present invention, the pressurizing mechanism 5 further includes a pressurizing tube 509 penetrating the first block 507 and the first gasket 508 , and a solenoid valve 510 is provided on the pressurizing tube 509 ; the pressurizing tube 509 is located at the center of the first gasket 508 .

[0046] In this embodiment, by connecting a high-pressure air pump to the pressurizing pipe 509, high-pressure air can be injected into the installed seamless steel pipe to detect the pressure-bearing capacity of the seamless steel pipe. The pressurizing pipe 509 is set at the central position of the first gasket 508, so that air can be accurately transported into the seamless steel pipe.

[0047] In the present invention, the detection module 603 includes an end cover 603b fixed on the inner wall of the cylinder 602, the end cover 603b is fixed on one end of the circular tube 603a, a pressure sensor 603c is fixed on the side of the end cover 603b facing the inside of the circular tube 603a, a spring fixing part 603d is fixed to the detection end of the pressure sensor 603c, a spring 603e is arranged in the spring fixing part 603d, the end of the spring 603e is fixed on the boss 603f, and the end of the boss 603f is fixed to the arc piece 603g.

[0048] In this embodiment, the arc piece 603g can fit the seamless steel pipe as closely as possible. When the outer surface of the seamless steel pipe is deformed, the arc piece 603g is displaced. At this time, the arc piece 603g compresses the spring 603e. When the spring 603e is deformed, the pressure is transmitted to the pressure sensor 603c. The pressure sensor 603c converts the pressure signal into an electrical signal and transmits it to an external computer, thereby detecting the shape change of the seamless steel pipe under the pressure state.

[0049] In the present invention, a plurality of arc-shaped pieces 603g in the same row form a circular ring structure, and a plurality of rows of arc-shaped pieces 603g form a cylindrical structure.

[0050] In this embodiment, by combining a plurality of arc-shaped sheets 603g into a cylindrical structure, the outer surface of the seamless steel pipe can be fitted to the greatest extent, thereby reducing detection errors.

[0051] In the present invention, the sealing mechanism 7 includes a second frame 701 fixed on the top of the base 1 and a cylindrical body 702 fixed inside the second frame 701, a second electric cylinder 703 is arranged inside the cylindrical body 702, and a second block 704 is fixed to the output shaft of the second electric cylinder 703. The second block 704 is slidably arranged in the cylindrical body 702, and a second gasket 705 is arranged on the side of the second block 704 facing the outside of the cylindrical body 702.

[0052] In this embodiment, the second block 704 is pushed toward the rear end of the seamless steel pipe by the second electric cylinder 703, and the rear end of the seamless steel pipe is sealed by the second gasket 705, thereby avoiding leakage of high-pressure air and making the detection result more accurate.

[0053] In the present invention, the first block 507 and the second block 704 are both cylindrical structures. In the detection state, the axis lines of the first block 507, the second block 704, the cylinder 602, the first gasket 508 and the second gasket 705 coincide with each other.

[0054] In this embodiment, the first block 507 and the second block 704 are configured as cylindrical structures mainly to match the shape of the seamless steel pipe. Adaptive adjustment is made here. In the detection state, by setting the axis lines of the first block 507, the second block 704, the cylinder 602, the first gasket 508 and the second gasket 705 on the same straight line, the sealing can be made more complete, and at the same time, the pressurized pipe 509 can smoothly inject high-pressure gas into the seamless steel pipe, thereby reducing the error rate in the detection.

[0055] In the present invention, the pressurizing mechanism 5 further includes a plurality of slide bars 503 disposed on the upper end of the bracket 506 . The slide bars 503 slide through the plate body 501 and extend to the rear end of the plate body 501 .

[0056] In this embodiment, the sliding rod 503 can provide a certain guiding effect for the movement of the bracket 506, making it more stable during the movement.

[0057] In the present invention, the central axis of the spring fixing member 603d and the circular tube body 603a coincide with each other, and the outer diameter of the spring fixing member 603d is smaller than the inner diameter of the circular tube body 603a.

[0058] In this embodiment, this setting can make the detection result more accurate and prevent interference from other factors.

[0059] Reference Fig.10 A method for detecting the pressure bearing capacity of a seamless steel pipe based on a seamless steel pipe pressure bearing capacity detection device, the detection method steps are as follows:

[0060] S1. Preparation, equipment inspection: confirm that all components of the device are in normal condition; check whether the connection between the pressurized pipe 509 and the high-pressure air pump is stable, and whether the solenoid valve 510 can control the gas flow normally; sample preparation: ensure that the size of the seamless steel pipe to be tested meets the test requirements and has no obvious cracks or deformation; clean the surface and inner cavity of the steel pipe to ensure that there are no impurities;

[0061] S2. Sample installation, steel pipe placement: insert the seamless steel pipe into the cylinder 602 of the pressure detection mechanism 6, align the axis of the steel pipe with the central axis of the cylinder 602; adjust the position of the steel pipe so that its front and rear ends are respectively connected with the first gasket 508 and the second gasket 705, and ensure sealing; block the port: start the blocking mechanism 7, push the second block 704 through the second electric cylinder 703, and firmly press the second gasket 705 against the rear end of the seamless steel pipe; ensure that the blocking mechanism 7 and the pressurizing mechanism 5 form a sealed pressure environment together;

[0062] S3, pressurization detection, start pressurization: start the high-pressure air pump to deliver high-pressure gas to the seamless steel pipe through the pressurization pipe 509; adjust the solenoid valve 510 to control the gas delivery rate and pressure increase; continue pressurization: control the position of the pressurization mechanism 5 through the hoist 3 to ensure that the first gasket 508 stably seals the front end of the steel pipe, and monitor the pressure change at the same time; monitor deformation: when the seamless steel pipe is deformed under pressure, the detection module 603 in the cylinder 602 captures the deformation information; the pressure sensor 603c at the deformation location transmits the detected pressure signal to the connected computer in real time for processing;

[0063] S4. Data acquisition and analysis, data recording: the pressure data and deformation transmitted by the pressure sensor 603c are recorded in real time by a computer; a pressure capacity distribution diagram and a deformation trend diagram are generated according to the deformation degree at different positions of the seamless steel pipe; analysis results: the pressure capacity of the steel pipe is evaluated in combination with the test data to determine whether it meets the design requirements or has deformed beyond the allowable range;

[0064] S5. Judgment and feedback, result judgment: if the test data is within the allowable range, the steel pipe is judged to be qualified; if the pressure at certain positions is abnormal, the seamless steel pipe is judged to have defects, and the specific position and related data are recorded; feedback adjustment: according to the abnormal situation in the test, adjust the parameters of the test device or retest;

[0065] S6, recovery and maintenance, pressure relief and disassembly: turn off the high-pressure air pump, slowly release the high-pressure gas in the steel pipe through the solenoid valve 510, and take out the seamless steel pipe after ensuring safety; stop the sealing mechanism 7 and the pressurizing mechanism 5, and release the seals at both ends of the steel pipe; equipment cleaning and maintenance: clean the pressurizing pipe 509, the cylinder 602 and the detection module 603, and check whether the equipment is damaged or needs maintenance.

[0066] In this embodiment, this detection method can improve efficiency, accuracy, and safety, while having non-destructive detection and multi-dimensional data analysis capabilities, solving the problems of long detection time, low accuracy, and insufficient safety in the prior art, and greatly optimizing the detection process and quality assurance system of seamless steel pipes.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for testing the pressure bearing capacity of a seamless steel pipe, comprising a base (1) and a support frame (2) fixed on the top of the base (1), characterized in that: A hoist (3) is fixed on the top of the support frame (2), a lifting rod (4) is fixed on the moving end of the hoist (3), and a pressure mechanism (5) is provided at the end of the lifting rod (4) and can move along the moving end of the hoist (3); A pressure detection mechanism (6) is fixed on the top of the base (1), and the pressure detection mechanism (6) is arranged at the rear end of the pressurizing mechanism (5). The pressure detection mechanism (6) comprises a first frame (601) fixed on the top of the base (1), a cylinder (602) fixed inside the first frame (601), and a plurality of detection modules (603) evenly arranged on the inner wall of the cylinder (602), wherein the plurality of detection modules (603) form a circular tubular structure and can detect the surface deformation state of a tube profile sleeved with the plurality of detection modules (603); A blocking mechanism (7) capable of blocking the rear end of the pressure detection mechanism (6) is also fixed on the top of the base (1).

2. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 1, characterized in that: The pressurizing mechanism (5) comprises a fixing frame (502) fixed to the lifting rod (4), a plate body (501) being fixed at the lower end of the fixing frame (502), a hollow structure being formed between the fixing frame (502) and the plate body (501), a first electric cylinder (504) being fixed at the hollow structure, a connecting rod (505) being fixed at the action end of the first electric cylinder (504), a bracket (506) being fixed at the front end of the connecting rod (505), a first block body (507) being fixed at the lower end of the bracket (506), and a first gasket (508) being fixed at the rear end of the first block body (507).

3. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 2, characterized in that: The pressurizing mechanism (5) further comprises a pressurizing pipe (509) penetrating the first block (507) and the first gasket (508), and a solenoid valve (510) is arranged on the pressurizing pipe (509); The pressurizing tube (509) is located at the center of the first gasket (508).

4. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 1, characterized in that: The detection module (603) comprises an end cover (603b) fixed to the inner wall of the cylinder (602), the end cover (603b) being fixed to one end of the circular tube (603a), a pressure sensor (603c) being fixed to the side of the end cover (603b) facing the inside of the circular tube (603a), a spring fixing member (603d) being fixed to the detection end of the pressure sensor (603c), a spring (603e) being arranged inside the spring fixing member (603d), the end of the spring (603e) being fixed to a boss (603f), and the end of the boss (603f) being fixed to an arc-shaped piece (603g).

5. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 4, characterized in that: A plurality of the arc-shaped sheets (603g) in the same row form a circular ring structure, and a plurality of rows of the arc-shaped sheets (603g) form a cylindrical structure.

6. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 2, characterized in that: The blocking mechanism (7) comprises a second frame (701) fixed on the top of the base (1) and a cylindrical body (702) fixed inside the second frame (701); a second electric cylinder (703) is arranged inside the cylindrical body (702); a second block (704) is fixed to the output shaft of the second electric cylinder (703); the second block (704) is slidably arranged in the cylindrical body (702); and a second gasket (705) is arranged on the side of the second block (704) facing the outside of the cylindrical body (702).

7. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 6, characterized in that: The first block (507) and the second block (704) are both cylindrical structures. In the detection state, the axis lines of the first block (507), the second block (704), the cylinder (602), the first gasket (508) and the second gasket (705) coincide with each other.

8. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 2, characterized in that: The pressurizing mechanism (5) further comprises a plurality of sliding rods (503) arranged at the upper end of the bracket (506), wherein the sliding rods (503) slide through the plate body (501) and extend to the rear end of the plate body (501).

9. A device for detecting the pressure bearing capacity of a seamless steel pipe according to claim 4, characterized in that: The central axis of the spring fixing part (603d) and the circular tube (603a) coincide with each other, and the outer diameter of the spring fixing part (603d) is smaller than the inner diameter of the circular tube (603a).

10. A method for detecting the pressure bearing capacity of a seamless steel pipe, based on the device for detecting the pressure bearing capacity of a seamless steel pipe according to any one of claims 1 to 9, characterized in that: The steps of the method for testing the pressure bearing capacity of seamless steel pipe are as follows: S1. Preparation, equipment inspection: confirm that all components of the device are in normal condition; check whether the connection between the pressurized pipe (509) and the high-pressure air pump is stable, and whether the solenoid valve (510) can normally control the gas flow; sample preparation: ensure that the size of the seamless steel pipe to be tested meets the test requirements and has no obvious cracks or deformation; clean the surface and inner cavity of the steel pipe to ensure that there are no impurities; S2. Sample installation and steel pipe placement: insert the seamless steel pipe into the cylinder (602) of the pressure detection mechanism (6) so that the axis of the steel pipe is aligned with the central axis of the cylinder (602); adjust the position of the steel pipe so that its front and rear ends are respectively connected to the first gasket (508) and the second gasket (705), and ensure sealing; block the port: start the blocking mechanism (7), push the second block (704) through the second electric cylinder (703), and firmly press the second gasket (705) against the rear end of the seamless steel pipe; ensure that the blocking mechanism (7) and the pressurizing mechanism (5) jointly form a sealed pressure environment; S3, pressurization detection, start pressurization: start the high-pressure air pump to deliver high-pressure gas to the seamless steel pipe through the pressurization pipe (509); adjust the solenoid valve (510) to control the gas delivery rate and pressure increase; continue pressurization: control the position of the pressurization mechanism (5) through the lifting machine (3) to ensure that the first gasket (508) stably seals the front end of the steel pipe, and monitor the pressure change at the same time; monitor deformation: when the seamless steel pipe is deformed under pressure, the detection module (603) in the cylinder (602) captures the deformation information; the pressure sensor (603c) at the deformation site transmits the detected pressure signal to the connected computer in real time for processing; S4, data acquisition and analysis, data recording: recording the pressure data and deformation conditions transmitted by the pressure sensor (603c) in real time through a computer; Generate a pressure capacity distribution diagram and a deformation trend diagram according to the deformation degree at different positions of the seamless steel pipe; Analysis results: Evaluate the pressure capacity of the steel pipe in combination with the test data to determine whether it meets the design requirements or has deformed beyond the allowable range; S5. Judgment and feedback, result judgment: if the test data is within the allowable range, the steel pipe is judged to be qualified; if the pressure at certain positions is abnormal, the seamless steel pipe is judged to have defects, and the specific position and related data are recorded; feedback adjustment: according to the abnormal situation in the test, adjust the parameters of the test device or retest; S6, recovery and maintenance, pressure relief and disassembly: turn off the high-pressure air pump, slowly release the high-pressure gas in the steel pipe through the solenoid valve (510), and take out the seamless steel pipe after ensuring safety; stop the sealing mechanism (7) and the pressurizing mechanism (5), and release the seals at both ends of the steel pipe; equipment cleaning and maintenance: clean the pressurizing pipe (509), the cylinder (602) and the detection module (603), and check whether the equipment is damaged or needs maintenance.

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