A portable oil pipe inner wall defect detection device

Abstract

The present invention relates to the technical field of pipe inner wall detection, and discloses a portable oil pipe inner wall defect detection device, comprising two semi-cylinders, the interiors of the two semi-cylinders being fixedly connected by a fixed cylinder, a detection mechanism being provided between the two semi-cylinders, and a travel assembly being provided on one side of each of the two semi-cylinders; the detection mechanism comprising a rotating sleeve rotatably connected between the two semi-cylinders. The portable oil pipe inner wall defect detection device, through the provision of a detection member, can not only perform ultrasonic detection of the oil pipe inner wall, but also collect data at the detection position, and ensures consistency between the detection and data collection positions, thereby improving the accuracy of subsequent analysis of pipe inner wall defects by its staff. The provision of a driving member can drive the detection member to rotate, satisfying the rotary detection work of the detection mechanism, increasing the detection range, and effectively utilizing the driving force of the equipment's travel, thereby having energy-saving and environmental protection functions.

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 manufacturing, oil pipes typically require appropriate testing equipment to inspect the inner wall for defects, ensuring consistency between weld positions and the inner wall. Chinese invention patent publication number CN108592846B discloses a portable oil pipe inner wall defect measuring instrument that is adaptable to various testing methods, including contact and non-contact measurement. This instrument is suitable for detecting not only the depth of weld grooves within electric welded pipes but also other defects such as corrosion pits and concave pits. This instrument significantly improves detection accuracy, reduces environmental requirements, and provides accurate and reliable test data, making it convenient to use. The instrument can measure inner wall defects on oil pipes and directly displays the depth of the measured defects on a digital display.

[0003] In the related art, existing pipe inner wall defect detection mechanisms can usually only detect local locations when inspecting welding positions on the pipe inner wall. Moreover, since the welding positions of oil pipes during assembly and welding are generally deep inside the assembled oil pipes, the above-mentioned methods cannot perform detection work. In addition, the detection range is small and cannot meet the requirements of inspecting different locations on the inner surface of the oil pipe, thereby reducing the functionality and use effect of the detection device. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to 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 ultrasonic detection of the inner wall of the oil pipe be performed, but also data can be collected at the detection position, and the consistency of the detection and data collection positions is ensured, thereby improving the accuracy of subsequent analysis of pipe inner wall defects by its 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 the small detection range that cannot meet the detection work of different positions on the inner surface of the oil pipe.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a portable device for detecting inner wall defects of a petroleum pipe, comprising two half-cylinders, the interiors of the two half-cylinders being fixedly connected by a fixing cylinder, a detection mechanism being provided between the two half-cylinders, and a walking assembly being provided on one side of each 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 rotating the detection member is provided on one of the semi-cylinders.

[0009] Preferably, the detection member includes 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 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 the semi-cylinder is provided with a rotating member for rotationally driving the transmission shaft.

[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, and 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 the 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, the interior of the sleeve is slidably connected to a transmission block, the outer surface of the transmission block is hinged with at least three inclined drive frames, 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 all equipped with rotatable driving wheels through brackets, and 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 sleeve and the fixed cylinder in the two walking 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 walking assemblies through two sets of external threads.

[0017] (3) Beneficial effects

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

[0019] 1. The present invention, through the setting of the detection member, can not only perform ultrasonic detection on the inner wall of the oil pipe, but also collect data at the detection position, and ensure the consistency of the detection and data collection positions, thereby improving the accuracy of subsequent staff's analysis of pipe inner wall defects. Through the setting of the driving member, the rotating sleeve can be rotated, and then the detection member 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, so that the detection mechanism moves 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 expansion or retraction of the transmission wheel. It 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 running wheels to expand, so that the running wheels are in close contact with the inner wall of the oil pipe, ensuring the stability of the detection device during travel. 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 drive the three running wheels in the two traveling assemblies 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 This is a schematic structural diagram of a portable oil pipe inner wall defect detection device according to the present invention;

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

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

[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 Schematic diagram of the structure of the middle driving component;

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

[0028] Figure 7 For the present invention Figure 4 Schematic cross-section of the detection mechanism;

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

[0030] Figure 9 For the present invention Figure 1 Schematic diagram of the structure of the walking component;

[0031] Figure 10 For the present invention Figure 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. Inspection 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. Travel assembly; 41. Sleeve; 42. Transmission block; 43. Drive frame; 44. Sliding frame; 45. Travel wheel; 46. Drive shaft. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0038] Example 1:

[0039] Refer to the attached Figure 1-10 A portable oil pipe inner wall defect detection device includes 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 provided between the two half-cylinders 1, and a walking assembly 4 is provided on one side of each 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 improving the range of subsequent oil pipe inner wall defect detection;

[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. Both rotating disks 34 are rotatably connected to the outer surface of the fixed cylinder 2. A retractable detection member 35 is provided inside the protective shell 32. A driving member 36 for rotating the detection member 35 is provided on one of the semi-cylinders 1.

[0042] By setting the detection member 35, not only can ultrasonic detection be performed on the inner wall of the oil pipe, but data can also be collected at the detection position, and the consistency of the detection and data collection positions is guaranteed, thereby improving the accuracy of subsequent analysis of defects on the inner wall of the pipe by its subsequent 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 rotary detection work of the detection mechanism 3 and improves the detection range, but also effectively utilizes the driving force of the equipment, 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.

[0043] Refer to the 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 provided for ultrasonic detection of the inner surface of the oil pipe. The baffle 351 is rotatably mounted inside the protective shell 32 so that the fan-shaped movement of the baffle 351 can drive the ultrasonic detector 353 to retract. Two sets of torsion springs 352 are provided to drive the retracted baffle 351 so that the baffle 351 can automatically expand when no pressure is applied, 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 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;

[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] Refer to the 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 356 is fixedly connected to one side of the inner wall of the protective shell 32;

[0048] The setting of the touch frame 358 makes it possible to preferentially lift the baffle 351 through the touch frame 358 when the lifting plate 354 is lifted upward, so that the baffle 351 moves in a fan-shaped manner at the rotationally connected position, thereby causing the baffle 351 and the ultrasonic detector 353 to move into the raised groove of the protective shell 32, forming automatic retraction, 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] Refer to the 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-cylinders 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. The semi-cylinder 1 is provided with a rotating member for rotating the transmission shaft 362.

[0051] The rotation of the transmission shaft 362 by the rotating member can drive the transmission gear 363 fixed thereto to rotate, which in turn can 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 facilitate 360-degree detection of the inner surface of the oil pipe, thereby increasing 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] Refer to the 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, and 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 the worm gear 368 and worm 367 can drive the rotating shaft 365 to rotate, 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] Example 2: Based on Example 1, the difference is that;

[0056] Refer to the attached Figures 4 to 6 The interior of the movable frame 364 is slidably connected to a threaded block 369, and one side of the threaded block 369 is fixedly connected to a movable plate 3610. The interior of the movable frame 364 is rotatably connected to a threaded rod 3611, and the threaded rod 3611 is threadedly connected to the internal thread of the threaded block 369. The rotating shaft 365 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 364 and the movable plate 3610 through the 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. 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, thereby facilitating the expansion or contraction of the transmission wheel 3612. This not only reduces the size of the driving member 36 and improves its portability, but also meets the use requirements 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 the 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] Example 3: Based on Example 1, the difference is that;

[0060] Refer to the attached Figure 9 and Figure 10 The walking assembly 4 includes a sleeve 41 on one side of the semi-cylinder 1, and a transmission block 42 is slidably connected inside the sleeve 41. 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 equipped with a rotatable driving wheel 45 through a bracket. 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 extend through.

[0061] The left and right movement of the transmission block 42 can drive the three drive 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, ensuring the stability of the detection device during movement. 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 be used to drive the two transmission blocks 42 to move relative to or apart from each other, thereby driving the three travel wheels 45 in the two travel assemblies 4 to expand or retract. This not only improves the convenience of subsequent carrying, but also meets the requirements for the inspection of oil pipes of different diameters, thereby improving the functionality and practicality of the equipment.

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

[0065] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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) being fixedly connected by a fixing cylinder (2), characterized in that: A detection mechanism (3) is provided between the two half-cylinders (1), and a walking assembly (4) is provided 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), the inner surface of the rotating sleeve (31) is fixedly connected to a rotating disk (34), 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); The driving member (36) includes 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-cylinders (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 (1); The 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 to mutually meshing bevel gears (366), the bottom end of the rotating shaft (365) is fixedly connected to a worm (367), and 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 to a worm wheel (368) meshing with the outer surface of the worm (367).

2. The portable oil pipe inner wall defect detection device according to claim 1, characterized in that: The detection member (35) includes a baffle (351) rotatably connected to the interior 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; 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. The 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 the industrial camera (355) and the lighting lamp (356) is fixedly connected to one side of the inner wall of the protective shell (32).

4. The portable oil pipe inner wall defect detection device according to claim 1, 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 connected to the internal thread 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.

5. The portable oil pipe inner wall defect detection device according to claim 1, characterized in that: The walking assembly (4) includes a sleeve (41) on one side of the semi-cylinder (1), the interior of the sleeve (41) is slidably connected to 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. 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 extend through.

6. The portable oil pipe inner wall defect detection device according to claim 5, 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). 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 sets of external threads.

Images