Seamless steel tube air tightness detection device

Abstract

The invention relates to the technical field of quality detection in the seamless steel pipe production process, and discloses a seamless steel pipe airtightness detection device which comprises an operation table, a mounting table is arranged on the operation table, a sealing mechanism and a moving mechanism are arranged on the mounting table, and a to-be-detected steel pipe is arranged on the sealing mechanism. An air conveying mechanism is arranged on the rear side of the operation table, the mounting table is connected with a cleaning mechanism through a moving mechanism, a collecting mechanism is arranged in the operation table, and an air drying mechanism is arranged on the upper middle portion of the mounting table. According to the invention, a full-automatic detection scheme combining a sealing mechanism and a gas transmission mechanism is adopted, efficient and accurate gas tightness detection is realized, and the device is suitable for large-scale assembly line work; through cleaning and air drying functions, the problem that the sealing effect is affected by dust or impurities is solved, and the detection accuracy is improved; by means of a dismounting assembly composed of a sliding sleeve, an installation spring and a fixing steel ball, the equipment maintenance convenience is improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of quality detection in a seamless steel pipe production process, in particular to an air tightness detection device for a seamless steel pipe. Background Art

[0002] Seamless steel pipes are widely used in fields with extremely high requirements for safety and sealing, such as petroleum, natural gas, chemical industry, and nuclear power. Therefore, airtightness testing becomes an important quality control link in the production process. The current seamless steel pipe air tightness detection technology mainly includes the following methods: injecting high-pressure water into the steel pipe to observe whether the steel pipe has leakage and using inert gas (such as helium) or air to inflate the steel pipe, and then detecting leakage through an external leak detector; From the current status of the use of existing technologies, the air tightness detection of seamless steel pipes faces the following main problems: most of the existing detection equipment requires manual operation and observation, which is labor-intensive and easily affected by human factors, and is difficult to adapt to the needs of modern and automated production lines. For example, the water pressure test has a long detection cycle and cumbersome operation steps; the gas leakage test requires multi-step configuration, which is difficult to adapt to fast operation scenarios; impurities or dust on the surface of the steel pipe may affect the sealing effect, especially in inert gas detection or water pressure detection, inadequate cleaning of the steel pipe surface may lead to misjudgment of the detection; the detection equipment is difficult to disassemble and maintain. For example, the sealing component of the detection device of the gas leakage test is inconvenient to replace, which affects the long-term performance of the equipment. Therefore, a seamless steel pipe air tightness detection device is proposed to solve the above problems. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a seamless steel pipe air tightness detection device, which solves the problems of low detection efficiency, complicated operation, frequent manual intervention, detection results affected by surface impurities, insufficient ability to identify tiny leaks, difficult equipment maintenance, and high detection cost in the prior art, thereby achieving efficient, accurate, reliable and automated air tightness detection effects.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a seamless steel pipe air tightness detection device, comprising an operating table, a mounting table is arranged on the operating table, a sealing mechanism and a moving mechanism are arranged on the mounting table, a steel pipe to be tested is arranged on the sealing mechanism, a gas transmission mechanism is arranged on the rear side of the operating table, a cleaning mechanism is connected to the mounting table through the moving mechanism, a collecting mechanism is arranged inside the operating table, and an air drying mechanism is arranged in the middle and upper part of the mounting table; The cleaning mechanism comprises a water tank, which is arranged inside the operating table. A water pump is arranged on the inner rear wall of the operating table. The water tank is connected to the input end of the water pump through a water pipe, and the output end of the water pump is connected to an atomizing spray head through a connecting pipe.

[0005] Preferably, the sealing mechanism includes multiple groups of driving cylinders, which are respectively arranged in the mounting platform, the output ends of the driving cylinders are fixedly connected with connecting shafts, and the connecting shafts are provided with disassembly components, and the connecting shafts are connected with connecting pipes through the disassembly components, and sealing end covers are provided on adjacent sides of the multiple connecting pipes, and sealing gaskets are provided inside the sealing end covers.

[0006] Preferably, the disassembly assembly includes a plurality of sliding sleeves, and the plurality of sliding sleeves are respectively arranged on the connecting shaft, and a mounting spring is arranged between the sliding sleeve and the connecting shaft, and a plurality of mounting grooves 1 are annularly opened on the connecting shaft, and fixed steel balls are arranged in each of the mounting grooves 1, and a plurality of mounting grooves 2 are annularly opened at one end of the connecting pipe away from the sealing end cover.

[0007] Preferably, the gas delivery mechanism includes a plurality of gas storage tanks, which are respectively arranged on the outside of the operating table, an air pump is arranged on the inner wall of the operating table, the input end of the air pump is connected to the gas storage tank through a gas pipe 1, two groups of connecting ports are arranged on the mounting platform, the output end of the air pump is connected to one of the connecting ports through a gas pipe 2, a gas delivery port is arranged on the sealing end cover in the sealing mechanism, the connecting port and the gas delivery port on the same side are connected through a pipeline, and a flow control component is arranged on the gas pipe 1.

[0008] Preferably, the control flow component includes a pressure reducing valve and a flow meter, and the pressure reducing valve and the flow meter are arranged on the gas pipeline one, and the other connecting port is provided with a gas pipeline three, and the gas pipeline three is provided with an exhaust valve.

[0009] Preferably, the moving mechanism includes a moving platform, which is arranged on the mounting platform, and a plurality of groups of slide rails and a plurality of groups of pulleys are arranged in the moving platform, and a transmission belt is passed between the plurality of pulleys, and a connecting plate is arranged on the transmission belt, and a cleaning plate is arranged on the connecting plate, and a plurality of sliders are arranged on the side of the cleaning plate close to the moving platform, and the sliders are slidably connected with the slide rails on the same horizontal line, and a motor 1 is arranged in the moving platform, and the output end of the motor 1 is connected to one of the pulleys, and the atomizing spray head is arranged in the cleaning plate.

[0010] Preferably, the collecting mechanism comprises a collecting box, and the collecting box is arranged inside the operating table. A collecting trough is provided on the operating table, and the collecting trough and the collecting box are connected via a collecting pipe.

[0011] Preferably, the air-drying mechanism comprises a tilting platform, the tilting platform is arranged at the upper middle part of the mounting platform, and a plurality of sets of fans are arranged inside the tilting platform.

[0012] Preferably, a touch screen and a PLC controller are provided on the front side of the operating table, an alarm is provided on the PLC controller, and a pressure sensor is provided on one of the sealing end covers in the sealing mechanism, and the pressure sensor transmits the collected data to the central control system.

[0013] Preferably, the central control system includes: Detection unit: used to transmit the data collected by the pressure sensor to the central control system; Analysis module: It analyzes the data collected in the central control system through the data processing unit; Driving unit: It drives the alarm through the analyzed information.

[0014] The present invention provides a seamless steel pipe air tightness detection device, which has the following beneficial effects: 1. The present invention adopts a technical solution combining a sealing mechanism (driving cylinder, sealing end cover) with a gas transmission mechanism, and realizes a fully automatic operation process of air tightness detection of seamless steel pipes through a PLC controller and a touch screen, achieving a technical effect of efficient and accurate detection. Compared with the air tightness detection solution relying on manual operation in the prior art, it solves the shortcomings of low efficiency, complicated operation and much manual intervention, and is particularly suitable for large-scale assembly line operations.

[0015] 2. The present invention adopts a method of thoroughly cleaning the surface of the steel pipe and promptly air-drying it before detection, thereby solving the problem in the prior art that the sealing effect of the steel pipe surface may be affected by dust or impurities, and further improving the accuracy and reliability of detection.

[0016] 3. The present invention utilizes disassembly components of structures such as sliding sleeves, mounting springs, and fixed steel balls. Through the sliding fit of the sliding sleeves and the positioning function of the fixed steel balls, rapid assembly and disassembly of the sealing end cover and the connecting shaft are achieved, thereby achieving the technical effect of improving the convenience of equipment maintenance and extending the service life of the equipment. After the equipment is completed, relevant components can be inspected and repaired in time to avoid misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a front structural schematic diagram of the present invention; Figure 3 It is a left-side structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the top view of the structure of the present invention; Figure 5 is a schematic diagram of the mobile mechanism of the present invention; Figure 6 A schematic diagram of a cleaning mechanism of the present invention; Figure 7 is a schematic diagram of a disassembly assembly of the present invention; Figure 8 for Figure 7 The enlarged view of point A in the middle; Fig. 9 It is a system framework diagram of the present invention.

[0018] Among them, 1. operating table; 2. mounting table; 3. sealing mechanism; 301. driving cylinder; 302. connecting shaft; 303. sealing end cover; 304. connecting pipe; 305. mounting spring; 306. fixing steel ball; 307. mounting slot 1; 308. sealing gasket; 309. sliding sleeve; 310. mounting slot 2; 4. gas transmission mechanism; 401. gas storage tank; 402. gas transmission pipe 1; 403. gas transmission pipe 2; 404. gas transmission pump; 405. connecting port; 406. gas transmission port; 407. pressure reducing valve; 408. flow meter; 409. gas transmission pipe 3; 410. exhaust valve; 5. Moving mechanism; 501. Moving platform; 502. Motor 1; 503. Pulley; 504. Transmission belt; 505. Slide rail; 506. Slider; 507. Connecting plate; 508. Cleaning plate; 6. Cleaning mechanism; 601. Water tank; 602. Water pump; 603. Connecting pipe; 604. Atomizing spray head; 7. Collecting mechanism; 701. Collecting trough; 702. Collecting pipe; 703. Collecting box; 8. Air drying mechanism; 801. Tilting platform; 802. Fan; 9. Touch screen; 10. PLC controller; 11. Alarm; 12. Steel pipe to be tested; 13. Pressure sensor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Please refer to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 7 and attached Figure 8The embodiment of the present invention provides an air tightness detection device for a seamless steel pipe, comprising an operating table 1, a mounting table 2 is arranged on the operating table 1, a sealing mechanism 3 is arranged on the mounting table 2, the sealing mechanism 3 comprises a plurality of driving cylinders 301, the plurality of driving cylinders 301 are respectively arranged in the mounting table 2, a connecting shaft 302 is fixedly connected to the output end of the driving cylinder 301, a disassembly assembly is arranged on the connecting shaft 302, the connecting shaft 302 is connected to a connecting pipe 304 through the disassembly assembly, a sealing end cover 303 is arranged on the adjacent side of the plurality of connecting pipes 304, and a sealing gasket 308 is arranged inside the sealing end cover 303; The operating table 1 is welded with high-strength steel, has good stability and durability, and can provide a place for the installation of other components. The mounting table 2, as an extension of the operating table 1, can not only ensure the airtightness of the operating table 1, but also install components such as the sealing mechanism 3. The driving cylinder 301 provides power for the fixation of the steel pipe 12 to be tested, making it a key device for sealing and removal. The connecting shaft 302 is used to transmit the movement output by the driving cylinder 301, and is also the installation body of the disassembly component. The sealing gasket 308 is made of a rubber material that is resistant to high temperature, aging and has good elasticity. It is a key component for achieving sealing inside the steel pipe 12 to be tested.

[0021] The disassembly assembly includes a plurality of sliding sleeves 309, which are respectively arranged on the connecting shaft 302, and a mounting spring 305 is arranged between the sliding sleeve 309 and the connecting shaft 302. A plurality of mounting grooves 1 307 are annularly provided on the connecting shaft 302, and fixed steel balls 306 are arranged in the mounting grooves 1 307. A plurality of mounting grooves 2 310 are annularly provided at one end of the connecting pipe 304 away from the sealing end cover 303, and a steel pipe 12 to be tested is arranged on the sealing mechanism 3; The sliding sleeve 309 provides a point of action for manual portable disassembly. The sliding sleeve 309 can be quickly reset by utilizing the elastic potential energy of the mounting spring 305, and the mounting spring 305 can support the sliding sleeve 309 to prevent the sliding sleeve 309 from accidentally sliding. The mounting groove 1 307 provides a place for placing the fixed steel ball 306, and allows the fixed steel ball 306 to slide in the mounting groove 1 307, and can also limit the position of the fixed steel ball 306. The fixed steel ball 306 can slide into the mounting groove 2 310, thereby clamping the connecting pipe 304, so that the sealing end cover 303 is connected to the connecting shaft 302.

[0022] Please refer to the attached Figure 1 -Attached Figure 4A gas delivery mechanism 4 is arranged at the rear side of the operating table 1, and the gas delivery mechanism 4 includes a plurality of gas storage tanks 401, and the plurality of gas storage tanks 401 are respectively arranged outside the operating table 1, and a gas delivery pump 404 is arranged on the inner wall of the operating table 1, and the input end of the gas delivery pump 404 is connected to the gas storage tank 401 through a gas delivery pipe 1 402, and two groups of connection ports 405 are arranged on the mounting table 2, and the output end of the gas delivery pump 404 is connected to one of the connection ports 405 through a gas delivery pipe 2 403, and a gas delivery port 406 is arranged on the sealing end cover 303 in the sealing mechanism 3, and the same-side connection port 405 and the gas delivery port 406 are connected through a pipeline, and a flow control component is arranged on the gas delivery pipe 1 402; The gas storage tank 401 is used as a storage place for gas, and provides gas for gas transmission operation. The gas transmission pump 404 can provide power for gas transmission operation. The gas transmission pipe 2 403 and the gas transmission pipe 1 402 play a connecting role, and can transmit gas to the inside of the steel pipe. The connecting port 405 and the gas transmission port 406 play a role of connecting to the outside world, and can allow gas to enter the sealed steel pipe. The flow control component includes a pressure reducing valve 407 and a flow meter 408, which are arranged on the gas delivery pipe 1 402, and a gas delivery pipe 3 409 is arranged in the other connection port 405, and an exhaust valve 410 is arranged on the gas delivery pipe 3 409; The pressure reducing valve 407 adopts a precisely regulated pressure reducing valve to ensure stable air pressure, reduce the pressure of the transported gas, and avoid the damage of the stored high-density gas to the gas transmission components such as the gas transmission pipe 1 402. The gas transmission pipe 3 409 can discharge the gas inside the steel pipe when testing the sealing performance, and the exhaust valve 410 is a device for controlling the flow of gas.

[0023] Please refer to the attached Figure 2 , Attachment Figure 3 and attached Figure 5 A moving mechanism 5 is arranged on the mounting platform 2, and the moving mechanism 5 includes a moving platform 501. The moving platform 501 is arranged on the mounting platform 2. A plurality of groups of slide rails 505 and a plurality of groups of pulleys 503 are arranged in the moving platform 501. A transmission belt 504 passes between the plurality of pulleys 503. A connecting plate 507 is arranged on the transmission belt 504. A cleaning plate 508 is arranged on the connecting plate 507. A plurality of sliders 506 are arranged on the side of the cleaning plate 508 close to the moving platform 501. The sliders 506 and the slide rails 505 on the same horizontal line are slidably connected. A motor 502 is arranged in the moving platform 501, and the output end of the motor 502 is connected to one of the pulleys 503.

[0024] Motor 1 502 is a core driving component, which provides power for the movement of the atomizing spray head 604. A stable transmission system is formed through the combination of pulleys 503 to drive the cleaning plate 508. The atomizing spray head 604 moves smoothly and accurately linearly with the cleaning plate 508. The transmission belt 504 plays a key role in transmitting power in the displacement mechanism. The connecting plate 507 is fixed on the transmission belt 504 and is used to convert the movement of the belt into the linear displacement of the cleaning plate 508. It is an important interface for realizing motion transmission. The cleaning plate 508 serves as a direct mounting bracket for the atomizing spray head 604. The slide rail 505 and the slider 506 form a guide system to limit the linear movement of the cleaning plate 508 and ensure that the atomizing spray head 604 always slides along a predetermined linear trajectory.

[0025] Please refer to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 6 The mounting table 2 is connected to a cleaning mechanism 6 via a moving mechanism 5. The cleaning mechanism 6 includes a water tank 601. The water tank 601 is arranged inside the operating table 1. A water pump 602 is arranged on the inner rear wall of the operating table 1. The water tank 601 is connected to the input end of the water pump 602 through a water pipe. The output end of the water pump 602 is connected to an atomizing spray head 604 through a connecting pipe 603. The atomizing spray head 604 is arranged in the cleaning plate 508.

[0026] The water tank 601 stores the required water resources, the water pump 602 provides power for the cleaning mechanism 6, and the atomizing spray head 604 sprays water mist, which directly covers the surface of the steel pipe, so that the dust on the steel pipe combines with the water mist and falls off the steel pipe by gravity. The connecting pipe 603 plays the role of transmitting water flow.

[0027] Please refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 4 A collecting mechanism 7 is provided inside the operating table 1, and the collecting mechanism 7 includes a collecting box 703, and the collecting box 703 is provided inside the operating table 1. A collecting tank 701 is provided on the operating table 1, and the collecting tank 701 and the collecting box 703 are connected through a collecting pipe 702; The collecting tank 701 can gather the water droplets with impurities in one place, and the collecting pipe 702 can collect the waste water and transport it to the collecting box 703, while the collecting box 703 serves as a container for storing the waste water to facilitate subsequent treatment.

[0028] Please refer to the attached Figure 1 -Attached Figure 2 A drying mechanism 8 is provided in the middle and upper part of the mounting platform 2. The drying mechanism 8 includes a tilting platform 801. The tilting platform 801 is provided in the middle and upper part of the mounting platform 2. A plurality of fans 802 are provided inside the tilting platform 801. The tilting platform 801 provides a place for installing the fan 802 and allows the fan 802 to be oriented toward the steel pipe; the high-speed airflow generated by the fan 802 allows dust and impurities to quickly fall off the steel pipe.

[0029] Please refer to the attached Figure 1 -Attached Figure 4 A touch screen 9 and a PLC controller 10 are provided on the front side of the operating table 1. An alarm 11 is provided on the PLC controller 10. A pressure sensor 13 is provided on one of the sealing end covers 303 in the sealing mechanism 3. The pressure sensor 13 transmits the collected data to the central control system. The touch screen 9 is a component used by the staff to operate the equipment. The PLC controller 10 uses products from mainstream brands and supports multiple communication protocols, which is easy to integrate and expand. The pressure sensor 13 uses a high-precision pressure transmitter with a wide measuring range and rapid response. It can detect the air pressure conditions in the steel pipe in real time. The alarm 11 can promptly feedback the detection results.

[0030] Please refer to the attached Fig. 9 , the central control system includes: Detection unit: used to transmit the collected data of the pressure sensor 13 to the central control system; Analysis module: It analyzes the data collected in the central control system through the data processing unit; Driving unit: It drives the alarm 11 through the analyzed information.

[0031] Working principle: open the hatch on the operating table 1, put the steel pipe 12 to be tested into it, and then control the touch screen 9 to start the driving cylinder 301, and the driving cylinder 301 makes the connecting shaft 302 approach the steel pipe 12 to be tested, and the connecting shaft 302 is connected to the sealing end cover 303 through the disassembly assembly, and the sealing end cover 303 moves with the connecting shaft 302, and then the sealing end cover 303 and the sealing gasket 308 fix the steel pipe to be tested; After the fixing is completed, the water pump 602 is started. Under the power support of the water pump 602, the water in the water tank 601 is transported to the atomizing spray head 604 through the connecting pipe 603. Then the atomizing spray head 604 sprays the transported water toward the steel pipe 12 to be tested. During the spraying process, the motor 502 is started to rotate the pulley 503. Under the transmission connection of the transmission belt 504, the connecting plate 507 moves with the transmission belt 504, and the cleaning plate 508 on the connecting plate 507 moves accordingly. During the movement, the slider 506 also slides on the slide rail 505, so that the cleaning plate 508 can move on the same horizontal line, and the water mist sprayed by the atomizing spray head 604 also completely covers the steel pipe 12 to be tested; After the atomizing spray head 604 completely sprays the steel pipe 12 to be tested, the fan 802 in the tilting platform 801 is started to blow off the wastewater containing dust and other debris on the steel pipe 12 to be tested, and collect it through the collecting tank 701. The wastewater enters the collecting box 703 through the connection of the collecting pipe 702.

[0032] After the cleaning and air drying work is completed, the dust on the surface of the steel pipe 12 to be tested is cleaned, and the staff starts the gas pump 404 through the touch screen 9. The gas pump 404 draws the gas in the gas storage tank 401 to the connection port 405 through the gas pipe 1 402 and the gas pipe 2 403. When the gas flows on the gas pipe, the pressure reducing valve 407 and the flow meter 408 regulate and monitor the state of the gas, and then the gas is transported to the sealing end cover 303 through the pipeline, and enters the steel pipe 12 to be tested through the gas port 406; Then, the pressure maintaining stage is entered, the port is closed, and the pressure sensor 13 monitors the air pressure change in the steel pipe in real time. The duration is the set value. The pressure sensor 13 feeds back the real-time data to the control system in the PLC controller 10. If the air pressure drops by more than the preset threshold, it is judged as unqualified, and the sound and light alarm of the alarm 11 is triggered; otherwise, it is judged as qualified; After the test is completed, the exhaust valve 410 is opened to release the remaining gas in the steel pipe 12 to be tested, and the driving cylinder 301 is started again to make the sealing end cover 303 loosen the steel pipe 12 to be tested, and the tested steel pipe is taken out to prepare for the test of the next steel pipe; After completing all the inspection work, the staff slides the sliding sleeve 309 to compress the installation spring 305. At this time, the fixed steel ball 306 on the connecting shaft 302 will not be restricted by the sliding sleeve 309 when moving outward, so that the connecting pipe 304 can be removed from the connecting shaft 302, and the staff can perform maintenance and inspection on the sealing end cover 303, sealing gasket 308 and pressure sensor 13 on the connecting pipe 304. If the sealing requirements for re-operation are not met, timely changes can be made to ensure the normal use of the equipment and the accuracy of the inspection.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe air tightness detection device, comprising an operating table (1), characterized in that: The operating table (1) is provided with a mounting table (2), the mounting table (2) is provided with a sealing mechanism (3) and a moving mechanism (5), the sealing mechanism (3) is provided with a steel pipe (12) to be tested, a gas transmission mechanism (4) is provided at the rear side of the operating table (1), the mounting table (2) is connected to a cleaning mechanism (6) via the moving mechanism (5), a collecting mechanism (7) is provided inside the operating table (1), and an air drying mechanism (8) is provided at the middle and upper part of the mounting table (2); The cleaning mechanism (6) comprises a water tank (601), the water tank (601) being arranged inside the operating table (1), a water pump (602) being arranged on the inner rear wall of the operating table (1), the water tank (601) being connected to the input end of the water pump (602) via a water pipe, and the output end of the water pump (602) being connected to an atomizing spray head (604) via a connecting pipe (603).

2. The air tightness detection device for seamless steel pipe according to claim 1, characterized in that: The sealing mechanism (3) comprises a plurality of groups of driving cylinders (301), the plurality of groups of driving cylinders (301) being respectively arranged in the mounting platform (2), the output ends of the driving cylinders (301) being fixedly connected to connecting shafts (302), the connecting shafts (302) being provided with disassembly components, the connecting shafts (302) being connected to connecting pipes (304) via the disassembly components, the adjacent sides of the plurality of connecting pipes (304) being provided with sealing end covers (303), the sealing end covers (303) being provided with sealing gaskets (308) inside.

3. The air tightness detection device for seamless steel pipe according to claim 2, characterized in that: The disassembly assembly comprises a plurality of sliding sleeves (309), the plurality of sliding sleeves (309) being respectively arranged on the connecting shaft (302), a mounting spring (305) being arranged between the sliding sleeve (309) and the connecting shaft (302), a plurality of mounting grooves 1 (307) being annularly provided on the connecting shaft (302), a fixed steel ball (306) being arranged in each of the mounting grooves 1 (307), and a plurality of mounting grooves 2 (310) being annularly provided at one end of the connecting pipe (304) away from the sealing end cover (303).

4. The air tightness detection device for seamless steel pipe according to claim 1, characterized in that: The gas delivery mechanism (4) comprises a plurality of gas storage tanks (401), the plurality of gas storage tanks (401) being respectively arranged outside the operating table (1), an air delivery pump (404) being arranged on the inner wall of the operating table (1), an input end of the air delivery pump (404) being connected to the gas storage tank (401) via a first gas delivery pipe (402), two groups of connection ports (405) being arranged on the mounting table (2), an output end of the air delivery pump (404) being connected to one of the connection ports (405) via a second gas delivery pipe (403), a gas delivery port (406) being arranged on the sealing end cover (303) in the sealing mechanism (3), the connection port (405) and the gas delivery port (406) on the same side being connected via a pipeline, and a flow control component being arranged on the first gas delivery pipe (402).

5. The air tightness detection device for seamless steel pipe according to claim 4, characterized in that: The control flow component comprises a pressure reducing valve (407) and a flow meter (408), wherein the pressure reducing valve (407) and the flow meter (408) are arranged on the gas supply pipe 1 (402), and a gas supply pipe 3 (409) is arranged in the other connecting port (405), and an exhaust valve (410) is arranged on the gas supply pipe 3 (409).

6. The air tightness detection device for seamless steel pipe according to claim 1, characterized in that: The moving mechanism (5) comprises a moving platform (501), wherein the moving platform (501) is arranged on the mounting platform (2), wherein a plurality of groups of slide rails (505) and a plurality of groups of pulleys (503) are arranged in the moving platform (501), wherein a transmission belt (504) passes between the plurality of pulleys (503), wherein a connecting plate (507) is arranged on the transmission belt (504), wherein a cleaning plate (508) is arranged on the connecting plate (507), wherein a plurality of sliders (506) are arranged on a side of the cleaning plate (508) close to the moving platform (501), wherein the sliders (506) and the slide rails (505) are slidably connected on the same horizontal line, wherein a motor 1 (502) is arranged in the moving platform (501), wherein an output end of the motor 1 (502) is connected to one of the pulleys (503), and wherein the atomizing spray head (604) is arranged in the cleaning plate (508).

7. The air tightness detection device for seamless steel pipe according to claim 1, characterized in that: The collecting mechanism (7) comprises a collecting box (703), wherein the collecting box (703) is arranged inside the operating table (1), a collecting trough (701) is provided on the operating table (1), and the collecting trough (701) and the collecting box (703) are connected via a collecting pipe (702).

8. The air tightness detection device for seamless steel pipe according to claim 1, characterized in that: The air-drying mechanism (8) comprises an inclined platform (801), wherein the inclined platform (801) is arranged at the upper middle portion of the mounting platform (2), and a plurality of sets of fans (802) are arranged inside the inclined platform (801).

9. The air tightness detection device for seamless steel pipe according to claim 1, characterized in that: A touch screen (9) and a PLC controller (10) are arranged on the front side of the operating table (1), an alarm (11) is arranged on the PLC controller (10), and a pressure sensor (13) is arranged on one of the sealing end covers (303) in the sealing mechanism (3), and the pressure sensor (13) transmits collected data to a central control system.

10. The air tightness detection device for seamless steel pipe according to claim 9, characterized in that: The central control system comprises: Detection unit: used for transmitting the data collected by the pressure sensor (13) to the central control system; Analysis module: It analyzes the data collected in the central control system through the data processing unit; Driving unit: It drives the alarm (11) through the analyzed information.

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