Portable petroleum pipe inner wall defect detection device

Abstract

The invention relates to the technical field of pipe inner wall detection, and discloses a portable petroleum pipe inner wall defect detection device which comprises two half cylinders, the interiors of the two half cylinders are fixedly connected through a fixing cylinder, a detection mechanism is arranged between the two half cylinders, and walking assemblies are arranged on one sides of the two half cylinders; and the detection mechanism comprises a rotating sleeve rotationally connected between the two half cylinders. According to the portable petroleum pipe inner wall defect detection device, through the arrangement of the detection piece, ultrasonic detection work can be conducted on the inner wall of a petroleum pipe, data collection can be conducted on the detected position, the consistency of the detection position and the data collection position is guaranteed, the accuracy of follow-up analysis of the inner wall defect of the pipe by workers is improved, and the detection efficiency is improved. Through the arrangement of the driving part, the detection part can be driven to rotate, the rotary detection work of the detection mechanism is met, the detection range is widened, the driving force for equipment walking is effectively utilized, and the energy-saving and environment-friendly functions are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe inner wall detection, in particular to a portable petroleum pipe inner wall defect detection device. Background Art

[0002] After the production of oil pipes, corresponding testing equipment is generally required to detect defects on the inner wall of the pipe to ensure the consistency of the welding position and the inner wall of the pipe. The Chinese invention patent with publication number CN108592846B discloses a portable oil pipe inner wall defect measuring instrument, which can be applied to various detection methods, including contact measurement and non-contact measurement. The detection of oil pipe inner wall defects is not limited to the depth of the weld scraping groove in the electric welded pipe, and can also be used to detect other defects on the inner wall of the oil pipe, such as corrosion pits, pits, etc. The detection accuracy is greatly improved, the environmental requirements are low, and the detection data is accurate and reliable, which is convenient for detection and use. The present invention can measure the inner wall defects of the oil pipe and directly display the depth of the measured defects through a digital display.

[0003] In the related art, the existing pipe inner wall defect detection mechanism can usually only detect local positions when detecting the welding positions of the pipe inner wall. In addition, since the welding positions of the oil pipes are generally deep inside the assembled oil pipes during assembly and welding, the above-mentioned method cannot be used for detection, and the detection range is small, which cannot meet the detection work of different positions on the inner surface of the oil pipes, thereby reducing the functionality and use effect of the detection device. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a portable oil pipe inner wall defect detection device. Through the setting of the detection component, not only can the inner wall of the oil pipe be ultrasonically detected, but also data can be collected at the detected position, and the consistency of the detection and data collection positions is guaranteed, thereby improving the accuracy of subsequent analysis of pipe inner wall defects by subsequent staff. Through the setting of the driving component, the detection component can be driven to rotate, which not only meets the rotary detection work of the detection mechanism and improves the detection range, but also effectively utilizes the driving force of the equipment to make the detection mechanism move in a threaded shape inside the oil pipe, further improving its detection range as well as its detection effect and accuracy, and solving the problems of inconvenience in detecting deep positions of the oil pipe and small detection range that cannot meet the detection work of different positions on the inner surface of the oil pipe.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable oil pipe inner wall defect detection device, comprising two half-cylinders, the interiors of the two half-cylinders are fixedly connected by a fixing cylinder, a detection mechanism is arranged between the two half-cylinders, and a walking assembly is arranged on one side of the two half-cylinders;

[0008] The detection mechanism includes a rotating sleeve rotatably connected between two semi-cylinders, a protective shell with an open top is fixedly connected to the rotating sleeve, an end cover is provided at the opening of the protective shell, the inner surface of the rotating sleeve is fixedly connected to a rotating disk, and the two rotating disks are rotatably connected to the outer surface of the fixed cylinder, a retractable and expandable detection member is provided inside the protective shell, and a driving member for rotationally driving the detection member is provided on one of the semi-cylinders.

[0009] Preferably, the detection member comprises a baffle rotatably connected to the inside of the protective shell, two torsion springs are installed on the rotating end of the baffle, an ultrasonic detector is fixedly connected to the top of the baffle, and the back of the protective shell is convex;

[0010] The interior of the protective shell is slidably connected to a lifting plate, and an industrial camera and a lighting lamp are respectively installed on the top of the lifting plate. The bottom of the inner wall of the protective shell is fixedly connected to an electric cylinder, and the telescopic end of the electric cylinder is fixed to the bottom of the lifting plate.

[0011] Preferably, a touch frame is fixedly connected to one side of the top of the lifting plate, and a touch switch for controlling the industrial camera and the lighting lamp is fixedly connected to one side of the inner wall of the protective shell.

[0012] Preferably, the driving member includes a gear ring sleeve fixed to the outer side surface of one of the rotating disks and a transmission shaft rotatably connected to one of the semi-cylinders, one end of the transmission shaft is fixedly connected to a transmission gear meshing with the inner surface of the gear ring sleeve, and a rotating member for rotationally driving the transmission shaft is provided on the semi-cylinder.

[0013] Preferably, the rotating member includes a movable frame fixed to one side of the semi-cylinder, a rotating shaft is provided on one side of the movable frame, the top end of the rotating shaft and the other end of the transmission shaft are fixedly connected with mutually meshing bevel gears, the bottom end of the rotating shaft is fixedly connected with a worm, a transmission wheel is provided on one side of the movable frame, and the axis of the transmission wheel is fixedly connected with a worm wheel meshing with the outer surface of the worm.

[0014] Preferably, the movable frame is internally slidably connected to a threaded block, one side of the threaded block is fixedly connected to a movable plate, the movable frame is internally rotatably connected to a threaded rod, and the threaded rod is connected to the internal threads of the threaded block, the rotating shaft is a retractable telescopic rod, and the telescopic end and bottom end of the telescopic rod are respectively rotatably connected to the outer side surfaces of the movable frame and the movable plate through a bracket, and the transmission wheel is rotatably connected to the bottom of the movable plate through the bracket.

[0015] Preferably, the walking assembly includes a sleeve on one side of the semi-cylinder, a transmission block is slidably connected inside the sleeve, at least three inclined drive frames are hinged on the outer surface of the transmission block, one end of the three drive frames extends to the outer surface of the sleeve, and one end of the three drive frames is hinged to a sliding frame, and the three sliding frames are equipped with rotatable walking wheels through brackets, the three sliding frames are slidably connected to one side of the semi-cylinder, and the outer surface of the sleeve is provided with three movable openings for the drive frames to extend through.

[0016] Preferably, a drive shaft is rotatably connected between the sleeves and the fixed cylinders in the two traveling assemblies, the outer surfaces of both ends of the drive shaft are provided with symmetrical external threads, and the drive shaft is threadedly connected to the transmission blocks in the two traveling assemblies through two sets of external threads.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a portable oil pipe inner wall defect detection device, which has the following beneficial effects:

[0019] 1. The present invention can not only perform ultrasonic detection on the inner wall of the oil pipe through the setting of the detection part, but also collect data at the detection position, and ensure the consistency of the detection and data collection positions, thereby improving the accuracy of the subsequent analysis of the inner wall defects of the pipe by the staff. By setting the driving part, the rotating sleeve can be rotated, and then the detection part can be driven to rotate through the protective shell, which not only meets the rotary detection work of the detection mechanism and improves the detection range, but also effectively utilizes the driving force of the equipment to make the detection mechanism move in a threaded shape inside the oil pipe, further improving its detection range, and improving its detection effect and accuracy.

[0020] 2. The present invention can drive the threaded block to move up and down through the rotation drive of the threaded rod, and the up and down movement of the threaded block can drive the movable plate to move up and down, and then the transmission wheel can move up and down, which is convenient for the transmission wheel to be deployed or retracted, which can not only reduce the volume of the driving member and improve its portability, but also meet the use of oil pipes with different inner diameters, and can selectively control the rotation of the detection mechanism according to actual detection needs, thereby improving its detection diversity. The rotating shaft is a retractable telescopic rod, and the telescopic end and the bottom end of the telescopic rod are respectively rotatably connected to the outer side surfaces of the movable frame and the movable plate through the bracket, so that when the transmission wheel moves up and down, the worm and the worm are always in a meshing state, thereby improving the smoothness of its transmission.

[0021] 3. The present invention can drive the three drive frames to move in a fan shape through the left and right movement of the transmission block, and then drive the three sliding frames to expand or retract, and finally drive the three rotatably driven walking wheels to expand, so that the walking wheels are in close contact with the inner wall of the oil pipe, thereby ensuring the stability of the detection device when it is moving. By rotating the drive shaft, the two sets of external threads can be coordinated to drive the two transmission blocks to move relative to or apart, and then the three walking wheels in the two walking assemblies can be driven to expand or retract synchronously, which not only improves the convenience of subsequent carrying, but also meets the detection work of oil pipes of different diameters, and improves the functionality and practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a portable oil pipe inner wall defect detection device of the present invention;

[0023] Figure 2 For the present invention Figure 1 The rear view of the structure;

[0024] Figure 3 For the present invention Figure 1 Structural cross-sectional view of

[0025] Figure 4 For the present invention Figure 1 Schematic diagram of the structure of the testing agency;

[0026] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the middle driving part;

[0027] Figure 6 For the present invention Figure 5 The structural diagram of the middle transmission wheel;

[0028] Figure 7 For the present invention Figure 4 A schematic cross-sectional view of the detection mechanism;

[0029] Figure 8For the present invention Figure 7 A cross-sectional side view of the middle protective shell;

[0030] Fig. 9 For the present invention Figure 1 The structural diagram of the walking component;

[0031] Fig.10 For the present invention Fig. 9 Structural cross-sectional view of the middle sleeve.

[0032] In the figure: 1, half cylinder; 2, fixed cylinder;

[0033] 3. Detection mechanism; 31. Rotating sleeve; 32. Protective shell; 33. End cover; 34. Rotating disk;

[0034] 35. Detection parts; 351. Baffle; 352. Torsion spring; 353. Ultrasonic detector; 354. Lifting plate; 355. Industrial camera; 356. Lighting lamp; 357. Electric cylinder; 358. Touch frame; 359. Touch switch;

[0035] 36, driving member; 361, gear ring sleeve; 362, transmission shaft; 363, transmission gear; 364, movable frame; 365, rotating shaft; 366, bevel gear; 367, worm; 368, worm wheel; 369, threaded block; 3610, movable plate; 3611, threaded rod; 3612, transmission wheel;

[0036] 4. Traveling assembly; 41. Sleeve; 42. Transmission block; 43. Drive frame; 44. Sliding frame; 45. Traveling wheel; 46. Drive shaft. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments 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.

[0038] Embodiment 1:

[0039] See attached Figure 1-10 A portable oil pipe inner wall defect detection device comprises two half cylinders 1, the interiors of the two half cylinders 1 are fixedly connected by a fixing cylinder 2, a detection mechanism 3 is arranged between the two half cylinders 1, and a walking assembly 4 is arranged on one side of the two half cylinders 1;

[0040] The walking assembly 4 adopts a walking mechanism with an electric walking function in the prior art, which is used to drive the detection device to move inside the pipe body, thereby increasing the scope of subsequent inner wall defect detection of the oil pipe;

[0041] The detection mechanism 3 includes a rotating sleeve 31 rotatably connected between the two semi-cylinders 1, a protective shell 32 with an open top is fixedly connected to the rotating sleeve 31, an end cover 33 is provided at the opening of the protective shell 32, the inner surface of the rotating sleeve 31 is fixedly connected to a rotating disk 34, and the two rotating disks 34 are rotatably connected to the outer surface of the fixed cylinder 2, and a retractable and expandable detection member 35 is provided inside the protective shell 32, and a driving member 36 for rotating and driving the detection member 35 is provided on one of the semi-cylinders 1;

[0042] By setting the detection member 35, not only can the inner wall of the oil pipe be ultrasonically detected, but also data can be collected at the detected position, and the consistency of the detection and data collection positions is guaranteed, thereby improving the accuracy of the subsequent analysis of the inner wall defects of the pipe by the staff. By setting the driving member 36, the rotating sleeve 31 can be rotated, and then the detection member 35 can be driven to rotate through the protective shell 32, which not only meets the rotation detection work of the detection mechanism 3 and improves the detection range, but also effectively utilizes the driving force of the equipment to make the detection mechanism 3 move in a threaded shape inside the oil pipe, further improving its detection range, and improving its detection effect and accuracy.

[0043] See attached Figure 7 and Figure 8 The detection member 35 includes a baffle 351 rotatably connected to the inside of the protective shell 32, two torsion springs 352 are installed at the rotating end of the baffle 351, an ultrasonic detector 353 is fixedly connected to the top of the baffle 351, and the back of the protective shell 32 is convex;

[0044] The ultrasonic detector 353 is used to perform ultrasonic detection on the inner surface of the oil pipe. The baffle 351 is installed inside the protective shell 32 in a rotating manner, so that the baffle 351 can drive the ultrasonic detector 353 to be retracted in a fan-shaped manner. The two sets of torsion springs 352 are used to drive the retracted baffle 351, so that the baffle 351 can be automatically unfolded when no pressure is received, thereby improving the orderliness of the detection and data collection of the detection mechanism 3;

[0045] The interior of the protective shell 32 is slidably connected with a lifting plate 354, and the top of the lifting plate 354 is respectively installed with an industrial camera 355 and a lighting lamp 356, and the bottom of the inner wall of the protective shell 32 is fixedly connected with an electric cylinder 357, and the telescopic end of the electric cylinder 357 is fixed to the bottom of the lifting plate 354;

[0046] The electric cylinder 357 is connected to the power supply and control system built into the cylinder body, and is used to drive the lifting plate 354 to move up and down. The up and down movement of the lifting plate 354 can drive the industrial camera 355 and the lighting lamp 356 to move up and down, forming an expansion or contraction movement, thereby facilitating better data collection and storage protection work.

[0047] See attached Figure 8 A touch frame 358 is fixedly connected to one side of the top of the lifting plate 354, and a touch switch 359 for controlling the industrial camera 355 and the lighting lamp 356 is fixedly connected to one side of the inner wall of the protective shell 32;

[0048] By setting the touch frame 358, when the lifting plate 354 is lifted upward, the baffle 351 can be lifted by the touch frame 358 first, so that the baffle 351 moves in a fan-shaped manner at the rotationally connected position, and then the baffle 351 and the ultrasonic detector 353 move to the raised groove of the protective shell 32, forming automatic contraction, so that the industrial camera 355 can be better deployed to form a camera data collection work;

[0049] By setting the touch switch 359, when the lifting plate 354 moves upward, the lifting plate 354 can lose the touch of the touch switch 359, so that the touch switch 359 automatically turns on the lighting 356 and the industrial camera 355, forming an automatic collection operation.

[0050] See attached Figures 4 to 6 The driving member 36 includes a gear ring sleeve 361 fixed to the outer side of one of the rotating disks 34 and a transmission shaft 362 rotatably connected to one of the semi-cylinder bodies 1, one end of the transmission shaft 362 is fixedly connected to a transmission gear 363 meshing with the inner surface of the gear ring sleeve 361, and a rotating member for rotating and driving the transmission shaft 362 is provided on the semi-cylinder body 1;

[0051] The rotating member drives the transmission shaft 362 to rotate, which can drive the transmission gear 363 fixed thereto to rotate, and then drive the gear ring sleeve 361 to rotate. The rotation of the gear ring sleeve 361 can drive one of the rotating disks 34 to rotate, and finally drive the entire detection mechanism 3 to rotate through the rotating sleeve 31, so as to perform 360-degree detection on the inner surface of the oil pipe and improve its detection range.

[0052] The rotating member includes, but is not limited to, a forward and reverse motor for rotationally driving the transmission shaft 362 .

[0053] See attached Figures 4 to 6The rotating member includes a movable frame 364 fixed to one side of the semi-cylinder 1, a rotating shaft 365 is provided on one side of the movable frame 364, the top end of the rotating shaft 365 and the other end of the transmission shaft 362 are fixedly connected with mutually meshing bevel gears 366, the bottom end of the rotating shaft 365 is fixedly connected with a worm 367, a transmission wheel 3612 is provided on one side of the movable frame 364, and the axis of the transmission wheel 3612 is fixedly connected with a worm wheel 368 meshing with the outer surface of the worm 367;

[0054] Through the contact between the transmission wheel 3612 and the inner wall of the oil pipe, in coordination with the movement of the detection equipment, the transmission wheel 3612 can roll on the inner wall of the oil pipe, and then can drive the rotating shaft 365 to rotate through the worm gear 368 and worm 367, and synchronously cooperate with the two mutually meshing bevel gears 366 to drive the transmission shaft 362 to rotate, which not only meets the rotation detection work of the detection mechanism 3 and improves the detection range, but also effectively utilizes the driving force of the equipment movement, so that the detection mechanism 3 moves in a threaded shape inside the oil pipe, further improving its detection range, and improving its detection effect and accuracy.

[0055] Embodiment 2: Based on embodiment 1, the difference is that;

[0056] See attached Figures 4 to 6 The movable frame 364 is internally slidably connected with a threaded block 369, one side of the threaded block 369 is fixedly connected with a movable plate 3610, the movable frame 364 is internally rotatably connected with a threaded rod 3611, and the threaded rod 3611 is connected with the internal threads of the threaded block 369, the rotating shaft 365 is a retractable telescopic rod, and the telescopic end and the bottom end of the telescopic rod are respectively rotatably connected to the outer side surfaces of the movable frame 364 and the movable plate 3610 through a bracket, and the transmission wheel 3612 is rotatably connected to the bottom of the movable plate 3610 through the bracket;.

[0057] By manually rotating the threaded rod 3611, the threaded block 369 can be driven to move up and down, and the up and down movement of the threaded block 369 can drive the movable plate 3610 to move up and down, and then the transmission wheel 3612 can be moved up and down, so as to facilitate the expansion or folding of the transmission wheel 3612, which can not only reduce the volume of the driving member 36 and improve its portability, but also meet the use of oil pipes with different inner diameters;

[0058] The rotating shaft 365 is a retractable telescopic rod, and the telescopic end and the bottom end of the telescopic rod are respectively rotatably connected to the outer side surfaces of the movable frame 364 and the movable plate 3610 through a bracket, so that when the transmission wheel 3612 moves up and down, its worm 367 and the worm wheel 368 are always in a meshing state, thereby improving the smoothness of its transmission.

[0059] Embodiment 3: Based on embodiment 1, the difference is that;

[0060] See attached Fig. 9 and Fig.10 The walking assembly 4 includes a sleeve 41 on one side of the semi-cylinder 1, a transmission block 42 is slidably connected inside the sleeve 41, and at least three inclined driving frames 43 are hinged on the outer surface of the transmission block 42, one end of each of the three driving frames 43 extends to the outer surface of the sleeve 41, and one end of each of the three driving frames 43 is hinged to a sliding frame 44, and each of the three sliding frames 44 is provided with a rotatably driven walking wheel 45 through a bracket, and each of the three sliding frames 44 is slidably connected to one side of the semi-cylinder 1, and the outer surface of the sleeve 41 is provided with three movable openings for the driving frames 43 to penetrate and extend;

[0061] The left and right movement of the transmission block 42 can drive the three driving frames 43 to move in a fan shape, and then drive the three sliding frames 44 to expand or retract, and finally drive the three rotatably driven walking wheels 45 to expand, so that the walking wheels 45 are in close contact with the inner wall of the oil pipe to ensure the stability of the detection device when it is moving. A motor for rotating the walking wheels 45 is installed on the bracket.

[0062] A drive shaft 46 is rotatably connected between the sleeve 41 and the fixed cylinder 2 in the two walking assemblies 4. The outer surfaces of both ends of the drive shaft 46 are provided with symmetrical external threads, and the drive shaft 46 is threadedly connected to the transmission blocks 42 in the two walking assemblies 4 through two sets of external threads.

[0063] By rotating the drive shaft 46, the two sets of external threads can cooperate to drive the two transmission blocks 42 to move relative to or apart, and then drive the three walking wheels 45 in the two walking assemblies 4 to expand or retract, which not only improves the convenience of subsequent carrying, but also meets the detection work of petroleum pipes of different diameters, and improves the functionality and practicality of the equipment.

[0064] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0065] 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 portable oil pipe inner wall defect detection device, comprising two half cylinders (1), the interiors of the two half cylinders (1) are fixedly connected by a fixing cylinder (2), characterized in that: A detection mechanism (3) is arranged between the two half cylinders (1), and a walking assembly (4) is arranged on one side of each of the two half cylinders (1); The detection mechanism (3) comprises a rotating sleeve (31) rotatably connected between two semi-cylinders (1); a protective shell (32) with an open top is fixedly connected to the rotating sleeve (31); an end cover (33) is provided at the opening of the protective shell (32); a rotating disk (34) is fixedly connected to the inner surface of the rotating sleeve (31); the two rotating disks (34) are rotatably connected to the outer surface of the fixed cylinder (2); a retractable and expandable detection member (35) is provided inside the protective shell (32); and a driving member (36) for driving the detection member (35) to rotate is provided on one of the semi-cylinders (1).

2. A portable oil pipe inner wall defect detection device according to claim 1, characterized in that: The detection member (35) comprises a baffle (351) rotatably connected to the inside of the protective shell (32), two torsion springs (352) are installed at the rotating end of the baffle (351), an ultrasonic detector (353) is fixedly connected to the top of the baffle (351), and the back side of the protective shell (32) is convex; The interior of the protective shell (32) is slidably connected to a lifting plate (354), and an industrial camera (355) and a lighting lamp (356) are respectively installed on the top of the lifting plate (354); the bottom of the inner wall of the protective shell (32) is fixedly connected to an electric cylinder (357), and the telescopic end of the electric cylinder (357) is fixed to the bottom of the lifting plate (354).

3. A portable oil pipe inner wall defect detection device according to claim 2, characterized in that: A touch frame (358) is fixedly connected to one side of the top of the lifting plate (354), and a touch switch (359) for controlling an industrial camera (355) and a lighting lamp (356) is fixedly connected to one side of the inner wall of the protective shell (32).

4. A portable oil pipe inner wall defect detection device according to claim 1, characterized in that: The driving member (36) comprises a gear ring sleeve (361) fixed to the outer side surface of one of the rotating disks (34) and a transmission shaft (362) rotatably connected to one of the semi-cylinder bodies (1); one end of the transmission shaft (362) is fixedly connected to a transmission gear (363) meshing with the inner surface of the gear ring sleeve (361); and a rotating member for rotationally driving the transmission shaft (362) is provided on the semi-cylinder body (1).

5. A portable oil pipe inner wall defect detection device according to claim 4, characterized in that: The rotating member comprises a movable frame (364) fixed to one side of the semi-cylinder (1); a rotating shaft (365) is provided on one side of the movable frame (364); the top end of the rotating shaft (365) and the other end of the transmission shaft (362) are both fixedly connected with mutually meshing bevel gears (366); the bottom end of the rotating shaft (365) is fixedly connected with a worm (367); a transmission wheel (3612) is provided on one side of the movable frame (364); the axis of the transmission wheel (3612) is fixedly connected with a worm wheel (368) meshing with the outer surface of the worm (367).

6. A portable oil pipe inner wall defect detection device according to claim 5, characterized in that: The movable frame (364) is internally slidably connected to a threaded block (369), one side of the threaded block (369) is fixedly connected to a movable plate (3610), the movable frame (364) is internally rotatably connected to a threaded rod (3611), and the threaded rod (3611) is threadedly connected to the inner surface of the threaded block (369), the rotating shaft (365) is a telescopic rod, and the telescopic end and the bottom end of the telescopic rod are respectively rotatably connected to the outer side surfaces of the movable frame (364) and the movable plate (3610) through a bracket, and the transmission wheel (3612) is rotatably connected to the bottom of the movable plate (3610) through the bracket.

7. The portable oil pipe inner wall defect detection device according to claim 1 is characterized by: The walking assembly (4) comprises a sleeve (41) on one side of the semi-cylinder (1), the interior of the sleeve (41) is slidably connected with a transmission block (42), the outer surface of the transmission block (42) is hinged with at least three inclined driving frames (43), one end of each of the three driving frames (43) extends to the outer surface of the sleeve (41), and one end of each of the three driving frames (43) is hinged with a sliding frame (44), and each of the three sliding frames (44) is provided with a rotatably driven walking wheel (45) through a bracket, and the three sliding frames (44) are slidably connected to one side of the semi-cylinder (1), and the outer surface of the sleeve (41) is provided with three movable openings for the driving frames (43) to penetrate and extend.

8. The portable oil pipe inner wall defect detection device according to claim 7 is characterized in that: A drive shaft (46) is rotatably connected between the sleeves (41) and the fixed cylinder (2) in the two traveling assemblies (4), and the outer surfaces of both ends of the drive shaft (46) are provided with symmetrical external threads, and the drive shaft (46) is threadedly connected to the transmission blocks (42) in the two traveling assemblies (4) through two groups of external threads.

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