Special magnetic particle flaw detector for petroleum pipe end

Abstract

The utility model relates to the technical field of magnetic particle flaw detectors, in particular to a special magnetic particle flaw detector for a petroleum pipe end, which is characterized in that a first moving mechanism is rotated by starting a fixing mechanism, and a cleaning mechanism, a magnetic spraying mechanism and a detection mechanism are respectively moved by starting a second moving mechanism; the cleaning mechanism is started to clean the outer wall of the petroleum pipeline, the magnet spraying mechanism is started to spray magnets to the cleaned petroleum pipeline end, and the detection mechanism is started to perform flaw detection on the petroleum pipeline end after magnet spraying is completed, so that the practicability of the equipment is improved; comprising a first moving mechanism; the device further comprises a fixing mechanism, a second moving mechanism, a cleaning mechanism, a magnetic spraying mechanism and a detection mechanism, the fixing mechanism is installed on the first moving mechanism, the second moving mechanism is installed on the cleaning mechanism, the cleaning mechanism is installed on the fixing mechanism, the magnetic spraying mechanism and the detection mechanism are both installed on the second moving mechanism, and the detection mechanism is located on the right side of the magnetic spraying mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic particle flaw detectors, in particular to a special magnetic particle flaw detector for oil pipe ends. Background Art

[0002] Oil pipe ends generally refer to the two ends of oil pipelines, which are used to transport fluids such as oil and natural gas in the oil industry. According to different uses and materials, oil pipe ends can be divided into various types, such as oil pipe ends for drilling, oil pipe ends for oil production, oil pipe ends for transportation, etc.; in addition, oil pipe ends can also be divided into threaded connection oil pipe ends and welded connection oil pipe ends according to the connection method.

[0003] For example, in a class of existing technologies represented by the magnetic particle flaw detector disclosed in the utility model patent with the application number 202420424733.7, its main structure includes a main shaft, a support frame, a base, universal wheels, a moving plate, a lighting lamp, etc., and magnetic particle flaw detection is realized through the cooperation of structures such as the main shaft, the support frame, the base, the universal wheels, the moving plate, and the lighting lamp.

[0004] During storage and use, dirt and dust may appear on the surface of the oil pipe ends, resulting in inaccurate detection. Moreover, it is difficult for traditional magnetic particle flaw detectors to spray magnetic powder evenly on the surface of the oil pipe ends, affecting the accuracy of detecting the oil pipe ends. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a special magnetic particle flaw detector for oil pipe ends, which rotates the first moving mechanism by starting the fixing mechanism, moves the cleaning mechanism, the magnetic powder spraying mechanism, and the detection mechanism respectively by starting the first moving mechanism, cleans the outer wall of the oil pipeline by starting the cleaning mechanism, sprays magnetic powder on the cleaned oil pipe ends by starting the magnetic powder spraying mechanism, and performs flaw detection on the oil pipe ends by starting the detection mechanism after the magnetic powder spraying is completed, improving the practicability of the equipment.

[0006] A special magnetic particle flaw detector for the end of an oil pipe of the utility model includes a first moving mechanism; it also includes a fixing mechanism, a second moving mechanism, a cleaning mechanism, a magnetic powder spraying mechanism and a detection mechanism. The fixing mechanism is installed on the first moving mechanism, the second moving mechanism is installed on the cleaning mechanism, the cleaning mechanism is installed on the fixing mechanism, the magnetic powder spraying mechanism and the detection mechanism are both installed on the second moving mechanism, and the detection mechanism is located on the right side of the magnetic powder spraying mechanism; by starting the first moving mechanism, the device is moved to the end of the oil pipe. By placing the end of the oil pipe in the fixing mechanism, it is fixed by the fixing mechanism. By starting the fixing mechanism, the first moving mechanism is rotated. By starting the second moving mechanism, the cleaning mechanism, the magnetic powder spraying mechanism and the detection mechanism are respectively moved. By starting the cleaning mechanism, the outer wall of the oil pipe is cleaned. By starting the magnetic powder spraying mechanism, the end of the oil pipe after cleaning is sprayed with magnetic powder. After the magnetic powder spraying is completed, by starting the detection mechanism, flaw detection of the end of the oil pipe is carried out, improving the practicability of the device.

[0007] Preferably, the first moving mechanism includes a base, a collection box and a plurality of rollers. The bottom end of the collection box is installed on the top end of the base, and the plurality of rollers are respectively installed at the bottom end of the base; the base supports the collection box, and the collection box collects cleaning liquid and fallen magnetic powder. By applying force to the base to rotate the plurality of rollers respectively, the device is moved to the construction site, improving the practicability of the device.

[0008] Preferably, the fixing mechanism includes a first support frame, a plurality of brackets, a plurality of first motors, a plurality of gears, a plurality of toothed rings, a plurality of bearings, a plurality of first cylinders and a plurality of fixing plates. An opening is provided at the top end of the first support frame. The plurality of first motors are respectively installed on the top end of the first support frame through the plurality of brackets. The inner rings of the plurality of gears are respectively installed on the output ends of the plurality of first motors. The outer rings of the plurality of gears are respectively meshed with the outer rings of the plurality of toothed rings. The inner rings of the plurality of toothed rings are respectively installed on the outer rings of the plurality of bearings. The inner rings of the plurality of bearings are respectively installed on the top end of the first support frame. The rear ends of the plurality of first cylinders are respectively installed on the inner walls of the plurality of bearings. The plurality of fixing plates are respectively installed at the front ends of the plurality of first cylinders; the ends of the oil pipes are respectively placed in the plurality of bearings, and the ends of the oil pipes are fixed by respectively extending the plurality of first cylinders through the plurality of fixing plates. By respectively starting the plurality of first motors to rotate the plurality of gears respectively, the plurality of bearings are rotated through the meshing of the plurality of gears and the plurality of toothed rings, so that the ends of the oil pipes are rotated. The plurality of brackets respectively support the plurality of first motors, improving the practicability of the device.

[0009] Preferably, the second moving mechanism includes a second support frame, an installation groove, a lead screw, a second motor, a plurality of sliders, and an installation frame. The top end of the installation groove is installed at the bottom end of the second support frame. The lead screw is installed in the installation groove, and the right end of the lead screw is connected to the output end of the second motor. A plurality of sliders are arranged on the lead screw, and the top end of the installation frame is installed on the plurality of sliders. The second support frame supports the installation groove, and the installation groove supports the lead screw. By starting the second motor to rotate the lead screw, the plurality of sliders are respectively moved through the rotation of the lead screw, and the installation frame is moved, improving the practicability of the equipment.

[0010] Preferably, the cleaning mechanism includes a third support frame, a cleaning barrel, a cleaning pump, a hose, a rotary joint, a cleaning brush, a third motor, and a second cylinder. The bottom ends of the cleaning barrel and the cleaning pump are installed at the top end of the third support frame. The input end of the cleaning pump is connected to the outer wall of the cleaning barrel. The input end of the hose is connected to the output end of the cleaning pump. The output end of the hose is connected to the input end of the rotary joint. The input end of the cleaning brush is connected to the output end of the rotary joint. The output end of the third motor is connected to the inner ring of the rotary joint. The third motor is installed at the bottom end of the second cylinder. By extending the second cylinder, the cleaning brush is lowered to the oil pipeline. By starting the cleaning pump, the cleaning liquid in the cleaning barrel is discharged into the rotary joint through the hose and then discharged into the cleaning brush by the rotary joint. By starting the third motor, the cleaning brush is rotated through the rotary joint to clean the oil pipe end, improving the practicability of the equipment.

[0011] Preferably, the magnetic spraying mechanism includes an air pump, an air pipe, a magnetic powder storage barrel, a third cylinder, and a magnetic sprayer. The output end of the air pump is connected to the input end of the air pipe. A one-way valve is arranged on the air pipe. The output end of the air pipe is connected to the input end of the magnetic powder storage barrel. The top end of the magnetic powder storage barrel is connected to the bottom end of the third cylinder. The output end of the magnetic powder storage barrel is connected to the input end of the magnetic sprayer. By extending the third cylinder, the magnetic sprayer is lowered. By starting the air pump to generate air pressure, the air pressure is discharged into the magnetic powder storage barrel through the air pipe. By starting the magnetic sprayer, the magnetic powder in the magnetic powder storage barrel is evenly discharged onto the surface of the oil pipe end by the magnetic sprayer, improving the practicability of the equipment.

[0012] Preferably, the detection mechanism includes a fourth cylinder and a magnetic particle flaw detector. The top end of the magnetic particle flaw detector is installed at the bottom end of the fourth cylinder. By extending and contracting the fourth cylinder, the magnetic particle flaw detector is raised and lowered. By starting the magnetic particle flaw detector, the oil pipe end is flaw detected, improving the practicability of the equipment.

[0013] The beneficial effects of the present utility model compared with the prior art are as follows: The device is moved to the end of the oil pipe by starting the first moving mechanism. The end of the oil pipe is placed in the fixing mechanism and fixed by the fixing mechanism. The first moving mechanism is rotated by starting the fixing mechanism. The cleaning mechanism, the magnetic spraying mechanism and the detection mechanism are respectively moved by starting the second moving mechanism. The outer wall of the oil pipeline is cleaned by starting the cleaning mechanism. The end of the oil pipe after cleaning is magnetically sprayed by starting the magnetic spraying mechanism. After the magnetic spraying is completed, the end of the oil pipe is subjected to flaw detection by starting the detection mechanism, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an axonometric schematic diagram of the first moving mechanism of the present utility model;

[0015] Figure 2 is an axonometric schematic diagram of the fixing mechanism of the present utility model;

[0016] Figure 3 is a front view of the fixing mechanism of the present utility model;

[0017] Figure 4 is an axonometric schematic diagram of the cleaning mechanism of the present utility model;

[0018] Figure 5 is an axonometric schematic diagram of the magnetic spraying mechanism of the present utility model;

[0019] Figure 6 is an axonometric schematic diagram of the detection mechanism of the present utility model;

[0020] Figure 7 is an axonometric schematic diagram of the present utility model.

[0021] Reference numerals in the drawings: 01, the first moving mechanism; 11, the base; 12, the collection box; 13, the roller; 02, the fixing mechanism; 21, the first support frame; 22, the bracket; 23, the first motor; 24, the gear; 25, the toothed ring; 26, the bearing; 27, the first cylinder; 28, the fixing plate; 03, the second moving mechanism; 31, the second support frame; 32, the installation groove; 33, the lead screw; 34, the second motor; 35, the slider; 36, the mounting frame; 04, the cleaning mechanism; 41, the third support frame; 42, the cleaning bucket; 43, the cleaning pump; 44, the hose; 45, the rotary joint; 46, the cleaning brush; 47, the third motor; 48, the second cylinder; 05, the magnetic spraying mechanism; 51, the air pump; 52, the air pipe; 53, the magnetic storage barrel; 54, the third cylinder; 55, the magnetic sprayer; 06, the detection mechanism; 61, the fourth cylinder; 62, the magnetic particle flaw detector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0023] Embodiment 1

[0024] As Figure 1 shown, a special magnetic particle flaw detector for the end of an oil pipe includes a first moving mechanism 01; it also includes a fixing mechanism 02, a second moving mechanism 03, a cleaning mechanism 04, a magnetic spraying mechanism 05 and a detection mechanism 06. The fixing mechanism 02 is installed on the first moving mechanism 01, the second moving mechanism 03 is installed on the cleaning mechanism 04, the cleaning mechanism 04 is installed on the fixing mechanism 02, both the magnetic spraying mechanism 05 and the detection mechanism 06 are installed on the second moving mechanism 03, and the detection mechanism 06 is located on the right side of the magnetic spraying mechanism 05;

[0025] By starting the first moving mechanism 01, the device is moved to the end of the oil pipe. By placing the end of the oil pipe in the fixing mechanism 02, it is fixed by the fixing mechanism 02. By starting the fixing mechanism 02, the second moving mechanism 03 is rotated. By starting the second moving mechanism 03, the cleaning mechanism 04, the magnetic spraying mechanism 05 and the detection mechanism 06 are respectively moved. By starting the cleaning mechanism 04, the outer wall of the oil pipe is cleaned. By starting the magnetic spraying mechanism 05, the end of the oil pipe after cleaning is magnetically sprayed. After the magnetic spraying is completed, by starting the detection mechanism 06, the end of the oil pipe is inspected for flaws, improving the practicability of the device;

[0026] As Figure 2 shown, the first moving mechanism 01 includes a base 11, a collection box 12 and a plurality of rollers 13. The bottom end of the collection box 12 is installed on the top end of the base 11, and the plurality of rollers 13 are respectively installed at the bottom end of the base 11;

[0027] As Figure 3 shown, the fixing mechanism 02 includes a first support frame 21, a plurality of brackets 22, a plurality of first motors 23, a plurality of gears 24, a plurality of toothed rings 25, a plurality of bearings 26, a plurality of first cylinders 27 and a plurality of fixing plates 28. An opening is provided at the top end of the first support frame 21. The plurality of first motors 23 are respectively installed on the top end of the first support frame 21 through the plurality of brackets 22. The inner rings of the plurality of gears 24 are respectively installed on the output ends of the plurality of first motors 23. The outer rings of the plurality of gears 24 are respectively meshed with the outer rings of the plurality of toothed rings 25. The inner rings of the plurality of toothed rings 25 are respectively installed on the outer rings of the plurality of bearings 26. The inner rings of the plurality of bearings 26 are respectively installed on the top end of the first support frame 21. The rear ends of the plurality of first cylinders 27 are respectively installed on the inner walls of the plurality of bearings 26. The plurality of fixing plates 28 are respectively installed at the front ends of the plurality of first cylinders 27;

[0028] As Figure 4 shown, the second moving mechanism 03 includes a second support frame 31, a mounting groove 32, a lead screw 33, a second motor 34, a plurality of sliders 35 and a mounting frame 36. The top end of the mounting groove 32 is mounted at the bottom end of the second support frame 31. The lead screw 33 is installed in the mounting groove 32. The right end of the lead screw 33 is connected to the output end of the second motor 34. A plurality of sliders 35 are arranged on the lead screw 33. The top end of the mounting frame 36 is mounted on the plurality of sliders 35;

[0029] The base 11 supports the collection box 12. The collection box 12 collects the cleaning liquid and the dropped magnetic powder. By means of the assisting base 11, the plurality of rollers 13 are rotated respectively, so that the device is moved to the construction site. The petroleum pipe ends are respectively placed in the plurality of bearings 26. By stretching the plurality of first cylinders 27 respectively, the petroleum pipe ends are fixed through the plurality of fixing plates 28. By starting the plurality of first motors 23 respectively, the plurality of gears 24 are rotated respectively. Through the engagement of the plurality of gears 24 and the plurality of toothed rings 25, the plurality of bearings 26 are rotated respectively, so that the petroleum pipe ends are rotated. The plurality of brackets 22 support the plurality of first motors 23 respectively. The second support frame 31 supports the mounting groove 32. The mounting groove 32 supports the lead screw 33. By starting the second motor 34, the lead screw 33 is rotated. Through the rotation of the lead screw 33, the plurality of sliders 35 are moved respectively, so that the mounting frame 36 is moved, improving the practicability of the device.

[0030] Embodiment 2

[0031] As Figure 5 shown, on the basis of Embodiment 1, a cleaning mechanism 04 is further included. The cleaning mechanism 04 includes a third support frame 41, a cleaning bucket 42, a cleaning pump 43, a hose 44, a rotary joint 45, a cleaning brush 46, a third motor 47 and a second cylinder 48. The bottom ends of the cleaning bucket 42 and the cleaning pump 43 are mounted at the top end of the third support frame 41. The input end of the cleaning pump 43 is connected to the outer wall of the cleaning bucket 42. The input end of the hose 44 is connected to the output end of the cleaning pump 43. The output end of the hose 44 is connected to the input end of the rotary joint 45. The input end of the cleaning brush 46 is connected to the output end of the rotary joint 45. The output end of the third motor 47 is connected to the inner ring of the rotary joint 45. The third motor 47 is mounted at the bottom end of the second cylinder 48;

[0032] By stretching the second cylinder 48, the cleaning brush 46 is lowered to the petroleum pipeline. By starting the cleaning pump 43, the cleaning liquid in the cleaning bucket 42 is discharged into the rotary joint 45 through the hose 44 and then discharged into the cleaning brush 46 from the rotary joint 45. By starting the third motor 47, the cleaning brush 46 is rotated through the rotary joint 45 to clean the petroleum pipe end, improving the practicability of the device.

[0033] Embodiment 3

[0034] AsFigure 6 and Figure 7 As shown in Figure 7 , on the basis of Embodiment 1, it further includes a magnetic spraying mechanism 05 and a detection mechanism 06. The magnetic spraying mechanism 05 includes an air pump 51, an air pipe 52, a magnetic storage barrel 53, a third cylinder 54, and a magnetic sprayer 55. The output end of the air pump 51 is connected to the input end of the air pipe 52. A check valve is provided on the air pipe 52. The output end of the air pipe 52 is connected to the input end of the magnetic storage barrel 53. The top of the magnetic storage barrel 53 is installed at the bottom end of the third cylinder 54. The output end of the magnetic storage barrel 53 is connected to the input end of the magnetic sprayer 55. The detection mechanism 06 includes a fourth cylinder 61 and a magnetic particle flaw detector 62. The top of the magnetic particle flaw detector 62 is installed at the bottom end of the fourth cylinder 61;

[0035] Lower the magnetic sprayer 55 by extending the third cylinder 54. Generate air pressure by starting the air pump 51 and discharge it into the magnetic storage barrel 53 through the air pipe 52. Evenly discharge the magnetic powder in the magnetic storage barrel 53 onto the surface of the oil pipe end by starting the magnetic sprayer 55. Raise and lower the magnetic particle flaw detector 62 by extending and retracting the fourth cylinder 61. Detect the oil pipe end by starting the magnetic particle flaw detector 62 to improve the practicability of the equipment.

[0036] Such as Figures 1 to 7As shown in the figure, a special magnetic particle flaw detector for the end of an oil pipe of the present utility model, when working, first, the base 11 supports the collection box 12, and the collection box 12 collects the cleaning liquid and the dropped magnetic powder. By the assistance of the base 11, multiple rollers 13 are rotated respectively to move the device to the construction site. Then, the ends of the oil pipes are respectively placed in multiple bearings 26, and the ends of the oil pipes are fixed by stretching multiple first cylinders 27 respectively through multiple fixing plates 28. By starting multiple first motors 23 respectively to rotate multiple gears 24, multiple bearings 26 are rotated respectively through the meshing of multiple gears 24 and multiple toothed rings 25, so that the ends of the oil pipes rotate. Multiple brackets 22 support multiple first motors 23 respectively. After that, the second support frame 31 supports the installation groove 32, and the installation groove 32 supports the lead screw 33. By starting the second motor 34 to rotate the lead screw 33, multiple sliders 35 are moved respectively through the rotation of the lead screw 33, so that the installation frame 36 moves. Then, by stretching the second cylinder 48, the cleaning brush 46 is lowered to the oil pipe. By starting the cleaning pump 43, the cleaning liquid in the cleaning bucket 42 is discharged into the rotary joint 45 through the hose 44, and is discharged from the rotary joint 45 into the cleaning brush 46. By starting the third motor 47, the cleaning brush 46 is rotated through the rotary joint 45 to clean the end of the oil pipe. After that, by stretching the third cylinder 54, the magnetic powder spraying device 55 is lowered. By starting the air pump 51 to generate air pressure, the air pressure is discharged into the magnetic powder storage barrel 53 through the air pipe 52. By starting the magnetic powder spraying device 55, the magnetic powder spraying device 55 evenly discharges the magnetic powder in the magnetic powder storage barrel 53 onto the surface of the end of the oil pipe. Finally, by stretching and contracting the fourth cylinder 61, the magnetic particle flaw detector 62 is raised and lowered, and by starting the magnetic particle flaw detector 62, the end of the oil pipe is flaw detected, improving the practicability of the device.

[0037] The first motor 23, the second motor 34, the cleaning pump 43, the third motor 47, the air pump 51, the magnetic powder spraying device 55 and the magnetic particle flaw detector 62 of the present utility model are purchased on the market. Those skilled in the industry only need to install and operate according to the attached operation manuals, without the need for creative labor from those skilled in the art.

[0038] The main functions achieved by the present utility model are: by starting the fixing mechanism 02 to rotate the second moving mechanism 03, by starting the second moving mechanism 03 to move the cleaning mechanism 04, the magnetic powder spraying mechanism 05 and the detection mechanism 06 respectively, by starting the cleaning mechanism 04 to clean the outer wall of the oil pipe, by starting the magnetic powder spraying mechanism 05 to spray magnetic powder on the end of the oil pipe after cleaning, and after the magnetic powder spraying is completed, by starting the detection mechanism 06 to perform flaw detection on the end of the oil pipe, improving the practicability of the device.

[0039] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A special magnetic particle flaw detector for oil pipe ends, comprising a first moving mechanism (01); characterized in that, It further includes a fixing mechanism (02), a second moving mechanism (03), a cleaning mechanism (04), a magnetic spraying mechanism (05) and a detection mechanism (06). The fixing mechanism (02) is installed on the first moving mechanism (01), the second moving mechanism (03) is installed on the cleaning mechanism (04), the cleaning mechanism (04) is installed on the fixing mechanism (02), both the magnetic spraying mechanism (05) and the detection mechanism (06) are installed on the second moving mechanism (03), and the detection mechanism (06) is located on the right side of the magnetic spraying mechanism (05).

2. The special magnetic particle flaw detector for oil pipe ends as described in claim 1, wherein The first moving mechanism (01) includes a base (11), a collection box (12) and a plurality of rollers (13). The bottom end of the collection box (12) is installed on the top end of the base (11), and the plurality of rollers (13) are respectively installed on the bottom end of the base (11).

3. A special magnetic particle flaw detector for oil pipe ends as described in claim 1, characterized in that, The fixing mechanism (02) includes a first support frame (21), a plurality of brackets (22), a plurality of first motors (23), a plurality of gears (24), a plurality of toothed rings (25), a plurality of bearings (26), a plurality of first cylinders (27) and a plurality of fixing plates (28). An opening is provided at the top end of the first support frame (21). The plurality of first motors (23) are respectively installed on the top end of the first support frame (21) via the plurality of brackets (22). The inner rings of the plurality of gears (24) are respectively installed on the output ends of the plurality of first motors (23). The outer rings of the plurality of gears (24) are respectively meshed with the outer rings of the plurality of toothed rings (25). The inner rings of the plurality of toothed rings (25) are respectively installed on the outer rings of the plurality of bearings (26). The inner rings of the plurality of bearings (26) are respectively installed on the top end of the first support frame (21). The rear ends of the plurality of first cylinders (27) are respectively installed on the inner walls of the plurality of bearings (26). The plurality of fixing plates (28) are respectively installed on the front ends of the plurality of first cylinders (27).

4. A special magnetic particle flaw detector for oil pipe ends as described in claim 1, characterized in that, The second moving mechanism (03) includes a second support frame (31), an installation groove (32), a lead screw (33), a second motor (34), a plurality of sliders (35) and an installation frame (36). The top end of the installation groove (32) is installed on the bottom end of the second support frame (31). The lead screw (33) is installed in the installation groove (32). The right end of the lead screw (33) is connected to the output end of the second motor (34). A plurality of sliders (35) are provided on the lead screw (33). The top end of the installation frame (36) is installed on the plurality of sliders (35).

5. The special magnetic particle flaw detector for oil pipe ends according to claim 1, characterized in that, The cleaning mechanism (04) includes a third support frame (41), a cleaning bucket (42), a cleaning pump (43), a hose (44), a rotary joint (45), a cleaning brush (46), a third motor (47) and a second cylinder (48). The bottom ends of the cleaning bucket (42) and the cleaning pump (43) are installed at the top end of the third support frame (41). The input end of the cleaning pump (43) is connected to the outer wall of the cleaning bucket (42). The input end of the hose (44) is connected to the output end of the cleaning pump (43). The output end of the hose (44) is connected to the input end of the rotary joint (45). The input end of the cleaning brush (46) is connected to the output end of the rotary joint (45). The output end of the third motor (47) is connected to the inner ring of the rotary joint (45). The third motor (47) is installed at the bottom end of the second cylinder (48).

6. The special magnetic particle flaw detector for the end of oil pipes according to claim 1, characterized in that The magnetic spraying mechanism (05) includes an air pump (51), an air pipe (52), a magnetic storage bucket (53), a third cylinder (54) and a magnetic sprayer (55). The output end of the air pump (51) is connected to the input end of the air pipe (52). A one-way valve is provided on the air pipe (52). The output end of the air pipe (52) is connected to the input end of the magnetic storage bucket (53). The top end of the magnetic storage bucket (53) is installed and connected to the bottom end of the third cylinder (54). The output end of the magnetic storage bucket (53) is connected to the input end of the magnetic sprayer (55).

7. The special magnetic particle flaw detector for oil pipe ends according to claim 1, characterized in that, The detection mechanism (06) includes a fourth cylinder (61) and a magnetic particle flaw detector (62). The top end of the magnetic particle flaw detector (62) is installed at the bottom end of the fourth cylinder (61).

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