Device suitable for detecting internal surface defects of ultra-deep container

Abstract

The invention is suitable for the field of nuclear power detection, and discloses a device suitable for detecting internal surface defects of an ultra-deep container. Comprising a connecting seat for fixing the device, a lifting rod body penetrating through the connecting seat and capable of moving up and down relative to the connecting seat, a detection unit arranged at one end, far away from the connecting seat, of the lifting rod body, a plurality of balance stretching units arranged around the lifting rod body, and a driving unit for driving the lifting rod body to move up and down, wherein the balance stretching unit comprises a rope body and a driven module, the rope body is connected with the connecting base and the end, away from the connecting base, of the lifting rod body, the driven module is arranged on the connecting base and used for stretching the rope body, and the driving assembly drives the driven module; the rope bodies are uniformly distributed on the periphery of the lifting rod body, so that force can be applied in a balanced manner, the lifting rod body is prevented from inclining, shaking or twisting due to uneven stress, the length of the lifting rod body can be prolonged as far as possible, surface detection can be carried out on the interior of an ultra-deep container at a short distance, and the detection range is expanded.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power detection, and particularly to a device suitable for detecting internal surface defects of ultra-deep containers. Background Art

[0002] For the detection of the inner surface of large ultra-deep containers, workers need to enter the container for detection, or scaffolds need to be erected for local detection. Whether workers enter the container or scaffolds are erected, a large amount of preparatory work is required before detection, and the detection area is greatly restricted. When workers enter a large ultra-deep container, protective measures or devices are needed. If the detection area changes, the positions of these protective measures or devices must be adjusted. Similarly, the same problem exists with scaffolds. However, due to the excessive depth inside the ultra-deep container, when the detection instrument on the long rod is inserted, it is prone to stability problems such as jitter and deformation during the lifting and lowering actions, causing damage to the detection instrument at the deepest part of the long rod, lens jitter, or inability to reach the designated position, thus affecting the detection effect. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a flaw detection shielding structure for the pressurizer compartment of a nuclear power unit.

[0004] The technical solution adopted by the present invention to solve its technical problems is to construct a device suitable for detecting internal surface defects of ultra-deep containers, including: a connection seat for fixing the device, a lifting rod body passing through the connection seat and capable of moving up and down relative to the connection seat, a detection unit arranged at one end of the lifting rod body away from the connection seat, a plurality of balance stretching units arranged around the lifting rod body, and a driving component for driving the lifting rod body to move up and down; wherein, the balance stretching unit includes a rope body respectively connected to the connection seat and the end of the lifting rod body away from the connection seat, and a driven module arranged on the connection seat and used for stretching the rope body, and the driving component drives the driven module.

[0005] In some embodiments, the driven module includes a driven wheel connected to the rope body and a guiding component for guiding the rope body. The axial direction of the driven wheel is the same as the length direction of the lifting rod body, the extending direction of the rope body from the driven wheel is parallel to the lifting rod body, and the guiding component guides the direction of the rope body to be parallel to the lifting rod body.

[0006] In some embodiments, the guiding component includes a first guiding wheel close to the driven wheel, a second guiding wheel arranged below the first guiding wheel, and a tension adjusting component arranged between the first guiding wheel and the second guiding wheel. The rope body is respectively abutted from both sides by the first guiding wheel and the second guiding wheel, and the tension adjusting component abuts against the rope body and applies a force of abutment to the rope body.

[0007] In some embodiments, the tension adjusting assembly includes a pressing wheel that abuts against the rope body, an adjusting rod body connected to the pressing wheel, a piston provided at one end of the adjusting rod body away from the pressing wheel, an adjusting cylinder that houses the piston, and a liquid inlet hole for introducing high-pressure air is provided at one end of the adjusting cylinder away from the pressing wheel.

[0008] The connecting seat is further provided with the tension display assembly, which includes a display groove opened on the connecting seat. Inside the display groove, there is a rubber display belt. An electric roller is sleeved inside the rubber display belt. Both ends of the electric roller are connected to the inner wall of the display groove. One end of the rubber display belt is provided with the swing rod body, which is rotatably arranged inside the display groove. A torsion spring is provided between the display groove and the swing rod body. A marker pen is provided at one end of the display groove facing the rubber display belt. A magnetic strip is fixed at one end of the swing rod body away from the marker pen. A magnetic telescopic member is provided on one side of the magnetic strip, and the magnetic telescopic member is connected to the inner wall of the display groove. The magnetic telescopic member is communicated with the adjusting cylinder through a pipeline.

[0009] In some embodiments, tooth grooves parallel to the length direction of the lifting rod body are provided on the outer surface of the lifting rod body. The driving assembly includes a worm connected to an external power source and a first gear provided above the worm and meshing with the tooth grooves. The worm meshes with the first gear.

[0010] In some embodiments, a bevel gear is provided on the worm, and a driven gear is provided at one end of the driven wheel. The driving assembly includes a second gear meshing with the bevel gear and a hollow ring body rotatably sleeved on the lifting rod body. The hollow ring body is provided with an upper tooth ring meshing with the second gear and a lower tooth ring meshing with the driven wheel.

[0011] In some embodiments, the connecting seat includes a fixed frame fixed to the outside and a fixing member fixedly connected to the lifting rod body.

[0012] In some embodiments, a linear guide rail is provided between the fixed frame and the fixing member, and the fixing member is movably connected to the linear guide rail.

[0013] In some embodiments, a pan-tilt is provided at the connection between the lifting rod body and the detection unit. On the pan-tilt, there is a pedestal connected to the lifting rod body and a rotating frame rotatably connected to the pedestal. The rotating frame is rotatably connected to the detection unit.

[0014] Implementing the device of the present invention for detecting internal surface defects of ultra-deep containers has the following beneficial effects: The rope body is evenly distributed around the lifting rod body, so that force can be applied evenly, avoiding tilting, jitter or distortion of the lifting rod body due to uneven force. Therefore, the length of the lifting rod body can be extended as much as possible, enabling surface detection of the inside of ultra-deep containers at close range and expanding the detection range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions of the present invention, the present invention will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0016] Figure 1 is an overall view of the device for detecting internal surface defects of ultra-deep containers in an embodiment of the present invention;

[0017] Figure 2 is a cross-sectional view of the device for detecting internal surface defects of ultra-deep containers in an embodiment of the present invention when it penetrates into the ultra-deep container;

[0018] Figure 3 is a partial view of the device for detecting internal surface defects of ultra-deep containers in an embodiment of the present invention;

[0019] Figure 4 is a partial perspective view of the device for detecting internal surface defects of ultra-deep containers in an embodiment of the present invention;

[0020] Figure 5 is Figure 3 an enlarged view of part A of

[0021] Figure 6 is a diagram of the tension display component of the device for detecting internal surface defects of ultra-deep containers in an embodiment of the present invention.

[0022] Reference numerals

[0023] 100. Connecting seat; 101. Fixed frame; 102. Fixing member; 103. Linear guide rail; 104. Fixator; 200. Lifting rod body; 210. Tooth groove; 300. Balanced tension unit; 310. Driven module; 311. Rope body; 312. Driven wheel; 313. Driven gear; 320. Driving assembly; 321. Worm; 322. Bevel gear; 330. First gear; 340. Second gear; 350. Hollow ring body; 351. Upper tooth ring; 352. Lower tooth ring; 360. Guide assembly; 361. First guide wheel; 362. Second guide wheel; 363. Extrusion wheel; 364. Adjusting rod body; 365. Adjusting cylinder; 366. Piston; 367. Liquid inlet hole; 400. Tension display assembly; 401. Display groove; 402. Rubber display tape; 403. Electric roller; 404. Rocking rod body; 405. Marker pen; 406. Torsion spring; 407. Magnetic strip; 408. Magnetic telescopic member; 500. Cloud platform; 510. Base; 520. Rotating frame; 600. Detection unit. Detailed implementation manners

[0024] For a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manners of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "upper", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are specific orientations and operations for the purpose of facilitating the description of the present technical solution, rather than indicating that the indicated devices or elements must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0025] It should also be noted that unless otherwise clearly defined and limited, terms such as "installation", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Figures 1 to 6Some preferred embodiments of the present invention are shown. The device applicable to the detection of internal surface defects of ultra-deep containers can be used for internal radiation shielding in nuclear power plants.

[0027] Figures 1 through 6 Shown is a device applicable to the detection of internal surface defects of ultra-deep containers in an embodiment of the present invention. The device applicable to the detection of internal surface defects of ultra-deep containers can be used for the detection of the interior of ultra-deep containers. It may include a connecting seat 100 for fixing the device, a lifting rod body 200 passing through the connecting seat 100 and capable of moving up and down relative to the connecting seat 100, a detection unit 600 provided at one end of the lifting rod body 200 away from the connecting seat 100, a plurality of balance stretching units 300 arranged around the lifting rod body 200, and a driving assembly 320 for driving the lifting and lowering movement of the lifting rod body 200; wherein, the balance stretching unit 300 includes a rope body 311 respectively connected to the connecting seat 100 and one end of the lifting rod body 200 away from the connecting seat 100, and a driven module 310 provided on the connecting seat 100 and used for stretching the rope body 311, and the driving assembly 320 drives the driven module 310.

[0028] The rope bodies 311 are evenly distributed around the lifting rod body 200, so that force can be applied evenly, avoiding the lifting rod body 200 from tilting, shaking or twisting due to uneven force. Therefore, the length of the lifting rod body 200 can be extended as much as possible, and the internal surface of the ultra-deep container can be detected at close range, expanding the detection range.

[0029] It can be understood that when the lifting rod body 200 moves, several evenly distributed rope bodies 311 will also be stretched synchronously, and the moving distance of the lifting rod body 200 is the same as the stretching length of the rope bodies 311.

[0030] It can be understood that there are four rope bodies 311, evenly distributed around the lifting rod body 200. The four stretching forces can improve the stability of the lifting rod body 200.

[0031] It can be understood that when the rope bodies 311 are connected to the lifting rod body 200, a certain pulling force is maintained on the lifting rod body 200. The evenly distributed rope bodies 311 can ensure the force balance of the lifting rod body 200 and keep the lifting rod body 200 stable.

[0032] In a specific embodiment, the detection unit is an electronic image recognition unit such as a camera or a video camera.

[0033] In a specific embodiment, the rope bodies 311 are made of flexible materials such as metal ropes and nylon ropes.

[0034] Figures 3 to 5It is shown that in one embodiment, the driven module 310 may include a driven wheel 312 connected to a rope body 311 and a guiding assembly 360 for guiding the rope body 311. The axial direction of the rotation shaft of the driven wheel 312 is the same as the length direction of the rod body. The extending direction of the rope body 311 from the driven wheel 312 is parallel to the rod body. The guiding assembly 360 guides the direction of the rope body 311 to a direction parallel to the rod body. When the lifting rod body 200 moves, the driving assembly 320 also synchronously drives the driven wheel 312 to rotate. The rope body 311 wound around the driven wheel 312 will extend or retract accordingly. After passing through the guiding assembly 360, the rope body 311 will change to a moving direction same as that of the lifting rod body 200. Therefore, the rope body 311 can move synchronously and can always maintain the same tension.

[0035] Figures 3 to 5 It is shown that in one embodiment, the guiding assembly 360 may include a first guiding wheel 361 close to the driven wheel 312, a second guiding wheel 362 arranged below the first guiding wheel 361, and a tension adjusting assembly arranged between the first guiding wheel 361 and the second guiding wheel 362. The rope body 311 is respectively abutted from both sides by the first guiding wheel 361 and the second guiding wheel 362. The tension adjusting assembly abuts against the rope body 311 and applies a force of abutment to the rope body 311. By abutting against and squeezing the rope body 311, the tension adjusting assembly increases the tension of the rope body 311, thereby adjusting the pulling force of the rope body 311 on the lifting rod body 200.

[0036] Figure 5 It is shown that in one embodiment, the tension adjusting assembly may include a squeezing wheel 363 abutting against the rope body 311, an adjusting rod body 364 connected to the squeezing wheel 363, a piston arranged at one end of the adjusting rod body 364 far from the squeezing wheel 363, an adjusting cylinder for accommodating the piston, and a liquid inlet hole for introducing high-pressure air is provided at one end of the adjusting cylinder far from the squeezing wheel 363. By adjusting the pressure of the introduced high-pressure air, the pressure of the squeezing wheel 363 on the rope body 311 is adjusted.

[0037] In a specific embodiment, the adjusting cylinder 365 is filled with a medium, and a liquid inlet hole 367 for conveying the medium is provided inside the adjusting cylinder 365.

[0038] During use, the piston 366 pushes the adjusting rod body 364 under the push of a compression spring. The adjusting rod body 364 pushes the squeezing wheel 363 to squeeze the rope body 311, causing the rope body 311 to bend at a preset angle. The bending included angle is preferably 5° - 15°, taking Figure 5 as an example;

[0039] When the tension of the rope body 311 is too small, the adjusting rod body 364 will further squeeze the rope body 311 under the push of the compression spring to make up for the missing tension of the lifting rod body 200;

[0040] When the tension of the rope body 311 is too large, the rope body 311 will gradually tighten and the generated force overcomes the elastic force of the compression spring. The adjusting rod body 364 contracts, and the bending angle of the rope body 311 changes, thereby reducing the tension generated on the lifting rod body 200.

[0041] In summary, the actual tension of the rope body 311 can be automatically adjusted to keep it within an ideal working range without manual intervention; through automatic adjustment, the fault tolerance can be further improved, and the possibility of equipment failure or dangerous situations caused by improper tension of the rope body 311 is reduced; the damage to the rope body 311 and the connected components caused by over-tensioning or insufficient tension is reduced, and the service life of the equipment is extended.

[0042] Secondly, during the movement of the piston 366, it will squeeze or extract the medium. The medium is preferably a liquid or a gas. When the medium is pressurized, it will enter the delivery pipe and drive the tension display assembly 400 to operate, so that the staff can intuitively observe the tension of the rope body 311.

[0043] Figure 6 It is shown that in one embodiment, the connection seat may further include a tension display assembly 400. The tension display assembly 400 includes a display slot 401 opened on the connection seat. Inside the display slot 401, there is a rubber display belt 402. An electric roller 403 is sleeved inside the rubber display belt 402. Both ends of the electric roller 403 are connected to the inner wall of the display slot 401. One end of the rubber display belt 402 is provided with a swing rod body 404. The swing rod body 404 is rotatably arranged inside the display slot 401. A torsion spring 406 is provided between the display slot 401 and the swing rod body 404. A marker pen 405 is provided at one end of the display slot 401 facing the rubber display belt 402. A magnetic strip 407 is fixed at the end of the swing rod body 404 away from the marker pen 405. A magnetic telescopic member 408 is provided on one side of the magnetic strip 407. The magnetic telescopic member 408 is connected to the inner wall of the display slot 401. The magnetic telescopic member 408 is communicated with the adjusting cylinder 365 through a pipeline.

[0044] In a specific embodiment, the magnetic telescopic member 408 is composed of a telescopic rod, a telescopic cylinder and a magnetic block. The telescopic cylinder is internally sealed and slidably connected with the telescopic rod. A magnetic block is fixed at the end of the telescopic rod away from the telescopic cylinder. Therefore, when the medium enters the telescopic cylinder, it can push the magnetic block to move; the magnetic strip 407 is composed of two symmetrically distributed magnetic strips. There is a gap between the two magnetic strips, and the gap corresponds to the initial position of the magnetic block to avoid mis-triggering the swing rod body 404. That is to say, when the medium increases or decreases, it will cause the change of the position of the magnetic block, so that the magnetic block corresponds to the magnetic strip and pushes the swing rod body 404 to swing; and the magnetic force of the magnetic strip increases from one side. Therefore, the larger the moving range of the magnetic block, the greater the swing amplitude of the swing rod body 404.

[0045] It can be understood that when the tension of the rope body 311 is stable, the stability of the medium inside the adjusting cylinder 365 will be maintained, so that the magnetostrictive member 408 will not drive the swing rod body 404 to swing greatly through the magnetic strip 407, and the swing rod body 404 will draw a smooth marking line through the marker pen 405 within the normal threshold range.

[0046] When the tension of the lifting rod body 200 is too large, the medium will be squeezed into the magnetostrictive member 408, pushing the magnet on the magnetostrictive member 408 to slide. The magnet corresponds to the magnetic strip on the magnetic strip 407 to generate a repulsive force to push the swing rod body 404. A torsion spring 406 is sleeved at the connection of the swing rod body 404, so the swing rod body 404 will swing greatly. By observing whether the marking line is smooth, the staff can judge whether the current tension of the rope body 311 is within the appropriate range.

[0047] When the tension of the lifting rod body 200 is too small, the medium in the magnetostrictive member 408 will flow back into the adjusting cavity. Similarly, it can be obtained that the swing rod body 404 will swing greatly. By observing whether the marking line is smooth, the staff can judge whether the current tension of the rope body 311 is within the appropriate range.

[0048] Secondly, when the shaking amplitude at the bottom of the lifting rod body 200 is large, it will also cause the drawn marking line to be not smooth enough, which is convenient for the staff to detect the working state of the detection camera in real time and avoid its damage.

[0049] In summary, by monitoring the tension of the rope body 311, it can be ensured that it is within a safe working range, preventing equipment damage or safety accidents caused by improper tension; using the magnetostrictive member 408 to convert the change of medium pressure into the action of magnetic force to provide power for the swing of the swing rod body 404; the swing amplitude of the swing rod body 404 intuitively reflects the tension state of the rope body 311, which is easy for the staff to observe and judge; through the smoothness of the marking line, the staff can quickly and intuitively judge whether the tension is appropriate without complex measuring tools.

[0050] In addition, the rubber display belt 402 is driven by the electric roller 403, so that the marker pen 405 can form a continuous curve on the surface of the rubber display belt 402; the marker pen 405 uses a wipeable marker pen 405, and a wiping layer is attached to the back of the display groove 401, which can automatically erase the marking line, facilitating the marker pen 405 to make marks repeatedly. Figure 2 and Figure 4It is shown that in one embodiment, the lifting rod body 200 may include a toothed groove 210 provided on the outer surface of the lifting rod body 200 and parallel to the length direction of the lifting rod body 200. The driving assembly 320 includes a worm 321 connected to an external power source and a first gear 330 disposed above the worm 321 and meshing with the toothed groove 210. The worm 321 meshes with the first gear 330. The worm 321 is connected to an external motor to generate rotation. The thread on the worm 321 rotates to drive the first gear 330 to rotate, and the rotation of the first gear 330 drives the toothed groove 210 to move up and down.

[0051] In a specific embodiment, the toothed groove 210 can be replaced with a rack.

[0052] Figure 3 and Figure 4 It is shown that in one embodiment, the worm 321 may include a bevel gear provided on the worm 321. One end of the driven wheel 312 is provided with a driven gear 313. The driving assembly 320 includes a second gear 340 meshing with the bevel gear, and a hollow ring body 350 sleeved on the lifting rod body 200 and rotatable. The hollow ring body 350 is provided with an upper toothed ring 351 meshing with the second gear 340 and a lower toothed ring 352 meshing with the driven wheel 312. The rotation of the worm 321 drives the bevel gear to rotate. The bevel gear 322 drives the second gear 340 to rotate. The second gear 340 drives the upper toothed ring 351 to rotate. The lower toothed ring 352 drives the driven gear 313 to rotate. Therefore, the lifting rod body 200 can be lifted and the rope body 311 can be stretched simultaneously by one worm 321.

[0053] Figure 1 It is shown that in one embodiment, the connecting seat 100 may include a fixed frame 101 fixed to the outside and a fixing member 102 fixedly connected to the lifting rod body 200. The fixed frame 101 is connected to the outside, and the fixing member 102 connects the lifting rod body 200 and the fixed frame 101.

[0054] In a specific embodiment, a plurality of fixators 104 are provided on the fixed frame 101, and the fixators 104 are mainly used for fixing on a planar object.

[0055] Figure 1 It is shown that in one embodiment, a linear guide rail 103 is provided between the fixed frame 101 and the fixing member 102. The fixing member 102 is movably connected to the linear guide rail 103. The fixing member 102 can move horizontally on the linear guide rail 103 of the fixed frame 101 to adjust the position of the detection unit.

[0056] Figure 1 and Figure 2It is shown that in one embodiment, the lifting rod body 200 may include a pan-tilt 500 provided at the connection between the lifting rod body 200 and the detection unit 600. A pedestal 510 connected to the lifting rod body 200 and a rotating frame 520 rotatably connected to the pedestal are provided on the pan-tilt 500. The rotating frame 520 is rotatably connected to the detection unit, and the angle and direction of the detection unit can be adjusted.

[0057] Figure 1 It is shown that in one embodiment, the driving assembly 320 may be connected to the output shaft of the stepping motor with an encoder, or the driving assembly 320 may be connected to the output shaft of the servo motor.

[0058] It can be understood that the above embodiments only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A device suitable for detecting surface defects inside ultra-deep containers, characterized in that: include: A connecting seat (100) for fixing a device, a lifting rod body (200) passing through the connecting seat (100) and movable up and down relative to the connecting seat (100), a detection unit (600) arranged at one end of the lifting rod body (200) away from the connecting seat (100), a plurality of balancing stretching units (300) arranged around the lifting rod body (200), and a driving component (320) for driving the lifting rod body (200) to move up and down; The balanced stretching unit (300) comprises a rope body (311) respectively connected to the connecting seat (100) and one end of the lifting rod body (200) away from the connecting seat (100), and a driven module (310) arranged on the connecting seat (100) and used for stretching the rope body (311), and the driving component (320) drives the driven module (310).

2. A device for detecting internal surface defects of ultra-deep containers according to claim 1, characterized in that: The driven module (310) comprises a driven wheel (312) connected to the rope body (311) and a guide assembly (360) for guiding the rope body (311); the rotation axis direction of the driven wheel (312) is the same as the length direction of the lifting rod body (200); the direction in which the rope body (311) extends from the driven wheel (312) is parallel to the lifting rod body (200); and the guide assembly (360) guides the direction of the rope body (311) to be parallel to the lifting rod body (200).

3. A device for detecting internal surface defects of ultra-deep containers according to claim 2, characterized in that: The guide assembly (360) comprises a first guide wheel (361) close to the driven wheel (312), a second guide wheel (362) arranged below the first guide wheel (361), and a tension adjustment assembly arranged between the first guide wheel (361) and the second guide wheel (362); the rope body (311) is abutted against each other from both sides by the first guide wheel (361) and the second guide wheel (362); the tension adjustment assembly abuts against the rope body (311) and applies an abutting force to the rope body (311).

4. The device for detecting internal surface defects of ultra-deep containers according to claim 3, characterized in that: The tension adjustment assembly comprises an extrusion wheel (363) abutting against the rope body (311), an adjustment rod body (364) connected to the extrusion wheel (363), a piston (366) arranged at an end of the adjustment rod body (364) away from the extrusion wheel (363), an adjustment cylinder (365) accommodating the piston (366), and an inlet hole (367) for introducing high-pressure air is provided at one end of the adjustment cylinder (365) away from the extrusion wheel (363).

5. The device for detecting internal surface defects of ultra-deep containers according to claim 4, characterized in that: The connection seat (100) is also provided with the tension display assembly (400), which includes a display slot (401) opened on the connection seat, a rubber display belt (402) is provided inside the display slot (401), an electric roller (403) is sleeved inside the rubber display belt (402), both ends of the electric roller (403) are connected to the inner wall of the display slot (401), one end of the rubber display belt (402) is provided with the swing arm body (404), the swing arm body (404) is rotatably arranged inside the display slot (401), and the A torsion spring (406) is provided between the display slot (401) and the rocking arm body (404); a marking pen (405) is provided at one end of the display slot (401) facing the rubber display band (402); a magnetic strip (407) is fixed at one end of the rocking arm body (404) away from the marking pen (405); a magnetic telescopic component (408) is provided on one side of the magnetic strip (407); the magnetic telescopic component (408) is connected to the inner wall of the display slot (401); and the magnetic telescopic component (408) is communicated with the adjustment cylinder (365) through a pipeline.

6. The device for detecting internal surface defects of ultra-deep containers according to claim 2, characterized in that: The outer surface of the lifting rod body (200) is provided with a tooth groove (210) parallel to the length direction of the lifting rod body (200), and the driving component (320) comprises a worm (321) connected to an external power source and a first gear (330) arranged above the worm (321) and meshing with the tooth groove (210), and the worm (321) meshes with the first gear (330).

7. The device for detecting internal surface defects of ultra-deep containers according to claim 6, characterized in that: The worm (321) is provided with a bevel gear, one end of the driven wheel (312) is provided with a driven gear (313), the driving assembly (320) comprises a second gear (340) meshing with the bevel gear, and a hollow ring body (350) rotatably sleeved on the lifting rod body (200), the hollow ring body (350) being provided with an upper gear ring (351) meshing with the second gear (340), and a lower gear ring (352) meshing with the driven wheel (312).

8. The device for detecting internal surface defects of ultra-deep containers according to claim 1, characterized in that: The connection seat (100) comprises a fixing frame (101) fixed to the outside and a fixing member (102) fixedly connected to the lifting rod body (200).

9. The device for detecting internal surface defects of ultra-deep containers according to claim 8, characterized in that: A linear guide rail (103) is provided between the fixed frame (101) and the fixed member (102), and the fixed member (102) is movably connected to the linear guide rail (103).

10. The device for detecting internal surface defects of ultra-deep containers according to claim 1, characterized in that: A pan platform (500) is provided at the connection between the lifting rod body (200) and the detection unit (600); the pan platform (500) is provided with a pedestal (510) connected to the lifting rod body (200) and a rotating frame (520) rotatably connected to the pedestal (510); and the rotating frame (520) is rotatably connected to the detection unit (600).

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