Steel pipe rotation detection device and detection method

Abstract

The invention discloses a steel pipe rotation detection device and method, and the device comprises a rack, and also comprises a carrying and conveying mechanism disposed on the rack, an elastic pressing wheel mechanism disposed on the rack, a through-type detection mechanism disposed on the rack, and a rotation detection mechanism disposed on the rack. The elastic pressing wheel mechanism is used for being matched with the carrying and conveying mechanism to convey the steel pipe, and the penetrating type detection mechanism and the rotary detection mechanism are used for conducting rotary eddy current detection on the outer surface of the steel pipe. The steel pipe rotation detection device has the advantages that by combining the penetrating type detection mechanism and the rotation detection mechanism, defects of different sizes on the surface of a steel pipe can be detected simultaneously.

Description

Technical Field

[0001] The present invention relates to the field of steel pipe detection equipment, and in particular to a steel pipe rotation detection device and a detection method. Background Art

[0002] There may be defects on the surface of the steel pipe. In order to ensure the yield rate of the steel pipe, the defects on the surface of the steel pipe need to be detected in a timely manner. The traditional detection method is to set up a through-type eddy current detection mechanism. This detection method uses the fact that after the steel pipe enters the detection range of the eddy current detection mechanism, the surface defects of the steel pipe cause changes in the eddy current field, thereby determining the presence of defects at the corresponding position of the steel pipe when the eddy current field changes. However, this method can only detect defects that are smaller than the detection range of the through-type eddy current detection mechanism. When the longitudinal distance between the two ends of the defect is greater than the detection range of the through-type eddy current detection mechanism, the through-type eddy current detection mechanism can only emit eddy current field changes when detecting the two ends of the defect. Even if there is a defect extending from one end of the steel pipe to the other end, the through-type eddy current detection mechanism cannot detect the existence of the defect.

[0003] In view of this, it is necessary to provide a steel pipe rotation detection device and detection method. Summary of the Invention

[0004] The present invention provides a steel pipe rotation detection device and detection method, which effectively solves the problem of missing detection of defects of different sizes on the surface of steel pipes during existing eddy current detection.

[0005] The technical solution adopted in the present invention is:

[0006] The steel pipe rotation detection device includes a frame, a supporting and conveying mechanism arranged on the frame, an elastic pressure wheel mechanism arranged on the frame, a through-type detection mechanism arranged on the frame, and a rotation detection mechanism arranged on the frame. The elastic pressure wheel mechanism is used to cooperate with the supporting and conveying mechanism to convey the steel pipe, and the through-type detection mechanism and the rotation detection mechanism are used to perform rotational eddy current detection on the outer surface of the steel pipe.

[0007] Furthermore, the rotation detection mechanism includes a guide rail arranged on the frame along the Y-axis direction, a sliding seat slidingly arranged on the guide rail, a lifting assembly arranged on the sliding seat, a rotation detection assembly arranged on the upper end surface of the lifting assembly, and a locking assembly arranged on the sliding seat, and the steel pipe is transported along the X direction.

[0008] Furthermore, the sliding assembly is used to slide on the guide rail to drive the lifting assembly and the rotating assembly to move synchronously, so that the rotating assembly switches between the detection position and the non-detection position, the lifting assembly is used to drive the rotating assembly to rise and fall, and the locking assembly is used to lock the sliding seat and the frame.

[0009] Furthermore, the rotation detection component includes a No. 1 bearing seat arranged on the lifting component, a No. 1 ball bearing arranged on the No. 1 bearing seat, a through-hole shaft connected to the inner ring of the No. 1 ball bearing, a No. 1 bracket arranged on the No. 1 bearing seat, a synchronous belt, a motor arranged on the bracket, a driving wheel arranged on the motor shaft, a driven wheel coaxially fixed on the outer periphery of the through-hole shaft, a connecting plate fixedly connected to the end face of the through-hole shaft, and at least one eddy current sensing component arranged on the connecting plate for detecting the steel pipe from the radial direction.

[0010] Furthermore, the eddy current sensing assembly includes a rail No. 1 arranged on the connecting plate, a slider No. 1 slidingly arranged on the rail No. 1, a bolt No. 1 threadedly arranged on the slider No. 1, a probe frame fixedly arranged on the slider No. 1, and a probe-type eddy current sensor arranged on the probe frame, wherein the rail No. 1 extends radially along the through-hole axis, and the No. 1 bolt is used to lock the slider No. 1 and the rail No. 1; the probe frame is also bolted with a connecting shaft and a No. 2 ball bearing arranged on the connecting shaft, and the axis of the connecting shaft is perpendicular to the axis of the through-hole axis.

[0011] Furthermore, the rotation detection mechanism also includes a protective cover arranged on the lifting assembly, the protective cover includes a lower box body arranged on the upper end surface of the lifting assembly, an upper box body arranged on one side of the lower box body through a hinge, and a buckle arranged on the other side of the lower box body for connecting with the upper box body, and when the upper box body and the lower box body are closed, a feed port and a discharge port corresponding to the two ends of the through-hole shaft are formed respectively.

[0012] Furthermore, the lifting assembly includes a No. 1 lifting plate, a No. 1 worm gear arranged on the base plate for driving the No. 1 lifting plate to lift, and a No. 1 handwheel connected to the No. 1 worm gear, and the rotation detection assembly is arranged on the lifting plate.

[0013] Furthermore, the elastic pressure wheel mechanism includes a support arranged on the frame, a lifting frame arranged on the support, a No. 1 cylinder fixedly arranged on the support for driving the lifting frame to lift, a linear bearing arranged on the lifting frame, a lifting shaft sleeved on the linear bearing, a fixed frame fixedly arranged at the lower end of the lifting shaft, a limit end arranged at the upper end of the lifting shaft, a spring sleeved on the lifting shaft and with both ends respectively abutting against the linear bearing and the limit end, a No. 4 ball bearing arranged at the lower end of the fixed frame, the No. 4 ball bearing rolling contact with the upper edge of the steel pipe along the conveying direction of the steel pipe, the supporting conveying mechanism includes a number of No. 2 bearing seats arranged on the frame, a number of No. 3 ball bearings respectively arranged on the No. 2 bearing seats, a number of rotating shafts respectively connected to the inner rings of the No. 3 ball bearings, a number of conveying wheels respectively coaxially arranged on the rotating shafts, and a sprocket chain drive assembly arranged on the frame for driving the plurality of rotating shafts to rotate synchronously.

[0014] Furthermore, the through-type detection mechanism includes a No. 2 lifting plate, a No. 2 worm gear arranged on the base plate for driving the No. 2 lifting plate to lift and lower, a No. 2 handwheel connected to the No. 2 worm gear, a through-type magnetic saturator arranged on the lifting plate, and an annular eddy current sensor arranged between the two ends of the through-type magnetic saturator.

[0015] A detection method adopts the steel pipe rotating detection device, the steel pipe is carried and conveyed by a supporting and conveying mechanism, the elastic pressure wheel mechanism floats and presses the steel pipe downward to cooperate with the supporting and conveying mechanism to convey the steel pipe, the through-type detection mechanism detects small defects on the surface of the steel pipe, and the rotating detection mechanism detects large defects on the surface of the steel pipe.

[0016] Beneficial effects of the invention:

[0017] 1. The steel pipe rotation inspection device combines a pass-through inspection mechanism with a rotational inspection mechanism to simultaneously detect defects of varying sizes on the steel pipe surface. The pass-through inspection mechanism detects small defects, while the rotational inspection mechanism, through its rotating eddy current sensing component, effectively captures large defects (such as longitudinally extending defects), avoiding the missed detection problem associated with traditional inspection methods due to defects outside the detection range. This dual detection mechanism significantly improves the comprehensiveness and accuracy of defect detection, ensuring that no surface defects on the steel pipe are missed.

[0018] 2. The rotary detection mechanism utilizes a modular design consisting of a sliding base and lifting assembly, allowing for flexible adjustment of the detection position and height based on actual needs. When rotary detection is not required, the rotary detection assembly can be moved out of the detection position to avoid interference. When detection is required, it can be quickly positioned and locked. This design not only improves the equipment's adaptability to different steel pipe specifications but also simplifies the operation process, making it suitable for a variety of production scenarios.

[0019] 3. The protective cover equipped with the rotating detection mechanism forms a closed space by closing the upper and lower boxes, effectively preventing dust and external impurities from entering the detection area, reducing the interference of environmental factors on the detection results, and ensuring the long-term stable operation of the detection process.

[0020] 4. The coordinated design of the elastic pressure roller mechanism and the supporting conveyor mechanism ensures stable conveying of steel pipes. The spring buffer and rolling contact of the ball bearings reduce friction damage on the steel pipe surface. The height of both the pass-through inspection mechanism and the rotating inspection mechanism can be quickly adjusted using a handwheel and worm gear to accommodate the inspection needs of steel pipes of varying diameters. This automated adjustment and efficient conveying mechanism significantly improves inspection efficiency, reduces manual intervention costs, and is suitable for large-scale continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of the steel pipe rotation detection device provided in an embodiment of the present application.

[0022] Figure 2 This is an exploded view of the rotation detection mechanism of the steel pipe rotation detection device provided in an embodiment of the present application.

[0023] Figure 3 This is a schematic diagram of a rotation detection assembly of a steel pipe rotation detection device provided in an embodiment of the present application.

[0024] Figure 4 This is a schematic diagram of the elastic pressure wheel mechanism of the steel pipe rotation detection device provided in an embodiment of the present application.

[0025] Figure 5 This is a schematic diagram of the through-type detection mechanism of the steel pipe rotation detection device provided in an embodiment of the present application.

[0026] Figure 6 This is a schematic diagram of the supporting and conveying mechanism of the steel pipe rotation detection device provided in an embodiment of the present application.

[0027] The following are marked in the figure: 1. Frame; 2. Carrying and conveying mechanism; 3. Elastic pressure wheel mechanism; 4. Through-type detection mechanism; 5. Rotation detection mechanism; 51. Guide rail; 52. Sliding seat; 53. Lifting assembly; 54. Rotation detection assembly; 55. Locking assembly; 541. Connecting plate; 542. No. 1 bearing seat; 543. Through-hole shaft; 544. No. 1 bracket; 545. Synchronous belt; 546. Motor; 547. Driving wheel; 548. Driven wheel; 549. Eddy current sensor assembly; 491. No. 1 rail; 492. No. 1 slider; 493. No. 1 bolt; 496. Probe frame; 494 , probe type eddy current sensor; 495, No. 2 ball bearing; 56, protective cover; 531, No. 1 lifting plate; 533, No. 1 handwheel; 532, No. 1 worm gear; 31, support; 32, lifting frame; 33, No. 1 cylinder; 34, linear bearing; 35, lifting shaft; 36, fixed frame; 37, limit end; 38, spring; 39, No. 4 ball bearing; 21, rotating shaft; 22, conveying wheel; 23, No. 2 bearing seat; 41, No. 2 lifting plate; 42, No. 2 handwheel; 43, through-type magnetic saturator; 44, annular eddy current sensor; 45, No. 2 worm gear; 100, steel pipe. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1As shown, the first embodiment provided by the present application is a steel pipe rotation detection device, whose structure includes a frame 1, and also includes a supporting and conveying mechanism 2 arranged on the frame 1, an elastic pressure wheel mechanism 3 arranged on the frame 1, a through-type detection mechanism 4 arranged on the frame 1, and a rotation detection mechanism 5 arranged on the frame 1. The elastic pressure wheel mechanism 3 is used to cooperate with the supporting and conveying mechanism 2 to convey the steel pipe 100, and the through-type detection mechanism 4 and the rotation detection mechanism 5 are used to perform rotational eddy current detection on the outer surface of the steel pipe 100.

[0030] It should be noted that a large-size defect is defined as a defect whose linear distance along the axial direction of the steel pipe is greater than or equal to the circumference of one rotation of the rotating detection mechanism 5. A small-size defect is defined as a defect whose linear distance along the axial direction of the steel pipe is less than the circumference of one rotation of the rotating detection mechanism 5.

[0031] In actual use, the steel pipe 100 is transported by the supporting conveying mechanism 2 and the elastic pressure wheel mechanism 3. When the steel pipe 100 passes through the through-type detection mechanism 4, if there is a small defect on the surface of the steel pipe 100 that is smaller than the detection range of the through-type detection mechanism 4, the through-type detection mechanism 4 will detect the existence of the small defect, and the position and size of the defect can be obtained by feedback of the change of eddy current from the through-type detection mechanism 4. When there is a long defect on the surface of the steel pipe 100 that is larger than the detection range of the through-type detection mechanism 4, the eddy current will change when the corresponding position of the long defect of the steel pipe 100 enters the through-type detection mechanism 4 and when it passes through the through-type detection mechanism 4. When the corresponding position of the long defect passes through the rotating detection mechanism 5, since the rotating detection mechanism 5 will rotate continuously, when the sensing end of the rotating detection mechanism 5 rotates one circle, it will sense the defect again to cause the change of eddy current.

[0032] In the above design, eddy currents can be used to sense large-scale defects on the surface of the steel pipe 100, thereby improving the ability to detect surface defects on the steel pipe 100.

[0033] Specifically: Figure 1 and Figure 2 As shown, the rotation detection mechanism 5 includes a guide rail 51 arranged on the frame 1 along the Y-axis direction, a sliding seat 52 slidingly arranged on the guide rail 51, a lifting component 53 arranged on the sliding seat 52, a rotation detection component 54 arranged on the upper end surface of the lifting component 53, and a locking component 55 arranged on the sliding seat 52. The steel pipe 100 is transported along the X-direction.

[0034] In actual use, the steel pipe 100 can be rotationally inspected or not inspected. When inspecting for rotation, the sliding seat 52 slides, causing the rotation inspection assembly 54 to move along the Y-axis to the inspection position, and then the sliding seat 52 is locked to the frame 1 using the locking assembly 55. When inspecting for rotation of the steel pipe 100 is no longer necessary, the sliding seat 52 slides, causing the rotation inspection assembly 54 to move out of the inspection position along the Y-axis, and then the locking assembly 55 is used to lock the sliding seat 52 to the frame 1.

[0035] In the above design, modular application of the rotation detection mechanism 5 can be achieved, thereby improving adaptability to different products.

[0036] Specifically: the sliding assembly is used to slide on the guide rail 51 to drive the lifting assembly 53 and the rotating assembly to move synchronously, so that the rotating assembly switches between the detection position and the non-detection position, the lifting assembly 53 is used to drive the rotating assembly to rise and fall, and the locking assembly 55 is used to lock the sliding seat 52 and the frame 1.

[0037] Specifically: Figure 3 As shown, the rotation detection assembly 54 includes a No. 1 bearing seat 542 mounted on the lifting assembly 53, a No. 1 ball bearing mounted on the No. 1 bearing seat 542, a through-hole shaft 543 connected to the inner ring of the No. 1 ball bearing, a No. 1 bracket 544 mounted on the No. 1 bearing seat 542, a synchronous belt 545, a motor 546 mounted on the bracket, a driving pulley 547 mounted on the rotating shaft of the motor 546, a driven pulley 548 coaxially fixedly mounted on the outer periphery of the through-hole shaft 543, a connecting plate 541 fixedly connected to the end face of the through-hole shaft 543, and at least one eddy current sensor assembly 549 mounted on the connecting plate 541 for radially detecting the steel pipe. The through-hole shaft 543 is provided with an axial through hole, and the steel pipe 100 passes through the through-hole shaft 543 from one end to the other along the axial through hole.

[0038] During the actual rotation inspection of the steel pipe, the steel pipe passes through one end of the through-hole shaft 543 and then passes through the other end of the through-hole shaft 543. The motor 546 drives the driving wheel 547 to rotate, and the driven wheel 548 and the through-hole shaft 543 are driven to rotate synchronously under the transmission of the synchronous belt 545. The through-hole shaft 543 drives the eddy current sensing component 549 to rotate synchronously. If the size of the long defect on the surface of the steel pipe 100 exceeds the detection range of the through-type detection mechanism 4, the eddy current sensing component 549 controls the speed through the motor 546 to ensure that eddy current changes are emitted during multiple cycles when the long defect passes through the eddy current sensor component, thereby finding the existence of the long defect.

[0039] In the above design, the structural design and specific implementation of the rotation detection component 54 can effectively detect the presence of large-scale defects on the surface of the steel pipe 100.

[0040] Specifically: Figure 3 As shown, the eddy current sensing assembly 549 includes a rail No. 1 491 arranged on the connecting plate 541, a slider No. 1 492 slidably arranged on the rail No. 1 491, a bolt No. 1 493 threadedly arranged on the slider No. 1 492, a probe frame 496 fixedly arranged on the slider No. 1 492, and a probe-type eddy current sensor 494 arranged on the probe frame 496. The rail No. 1 491 extends radially along the through-hole shaft 543, and the bolt No. 1 493 is used to lock the slider No. 1 492 and the rail No. 1 491; the probe frame 496 is also bolted with a connecting shaft and a No. 2 ball bearing 495 arranged on the connecting shaft, and the axis of the connecting shaft is perpendicular to the axis of the through-hole shaft 543.

[0041] In actual use, the linear distance between the probe-type eddy current sensor 494 and the steel pipe surface can be changed by adjusting the position of the first slider 492 on the first rail 491, and then tightening the first bolt 493. When the steel pipe moves, the eddy current sensing assembly 549 rotates, and the probe-type eddy current sensor 494 rotates synchronously. If the probe-type eddy current sensor 494 can still detect eddy current changes after the rotation, it indicates that there is a large defect at the corresponding position of the steel pipe.

[0042] In the above design, the structural design and specific implementation method of the eddy current sensing component 549 can effectively detect large-scale defects on the surface of the steel pipe.

[0043] Specifically: Figure 1 and Figure 2 As shown, the rotation detection mechanism 5 also includes a protective cover 56 arranged on the lifting assembly 53, and the protective cover 56 includes a lower box body arranged on the upper end surface of the lifting assembly 53, an upper box body arranged on one side of the lower box body through a hinge, and a buckle arranged on the other side of the lower box body for connecting with the upper box body. When the upper box body and the lower box body are closed, a feed port and a discharge port corresponding to the two ends of the through-hole shaft 543 are formed respectively.

[0044] In actual operation, there will be dust in the factory. The upper box and the lower box are closed by snapping together so that the rotation detection component 54 is located in the protective cover 56.

[0045] In the above design, the structural design and specific implementation of the protective cover 56 can achieve dust-proof protection for the rotation detection component 54 and reduce the interference of dust on detection.

[0046] Specifically: Figure 2 As shown, the lifting assembly 53 includes a No. 1 lifting plate 531, a No. 1 worm gear arranged on the base plate for driving the No. 1 lifting plate 531 to lift and lower, and a No. 1 handwheel 533 connected to the No. 1 worm gear. The rotation detection assembly 54 is arranged on the No. 1 lifting plate 531.

[0047] When the operating height of the rotation detection assembly 54 needs to be changed, the worm gear transmission is driven by rotating the number one hand wheel 533 to drive the number one lifting plate 531 to move up and down, thereby realizing the lifting of the rotation detection assembly 54 set on the upper end surface of the number one lifting plate 531.

[0048] In the above design, the structural design and specific implementation of the lifting assembly 53 can effectively adjust the height of the rotation detection assembly 54.

[0049] Specifically: Figure 1 and Figure 4 As shown, the elastic pressure wheel mechanism 3 includes a support 31 provided on the frame 1, a lifting frame 32 provided on the support 31, a No. 1 cylinder 33 fixedly provided on the support 31 for driving the lifting frame 32 to move up and down, a linear bearing 34 provided on the lifting frame 32, a lifting shaft 35 sleeved on the linear bearing 34, a fixing frame 36 fixedly provided on the lower end of the lifting shaft 35, a limiting end 37 provided on the upper end of the lifting shaft 35, a spring 38 sleeved on the lifting shaft 35 and having its two ends respectively abutting against the linear bearing 34 and the limiting end 37, and a No. 4 ball bearing 39 provided on the lower end of the fixing frame 36. The No. 4 ball bearing 39 is in rolling contact with the upper edge of the steel pipe 100 along the conveying direction of the steel pipe 100. Figure 1 and Figure 6 As shown, the supporting conveying mechanism 2 includes a number of No. 2 bearing seats 23 arranged on the frame 1, a number of No. 3 ball bearings respectively arranged on the No. 2 bearing seats 23, a number of rotating shafts 21 respectively connected to the inner rings of the No. 3 ball bearings, a number of conveying wheels 22 respectively coaxially arranged on the rotating shafts 21, and a sprocket chain drive assembly arranged on the frame 1 for driving the several rotating shafts 21 to rotate synchronously, and an annular V-groove is provided on the conveying wheel 22.

[0050] During transport, the lower end of the steel pipe is supported by an annular V-shaped groove. The sprocket chain drive assembly drives the rotating shafts 21, which in turn rotate the conveyor wheel 22, thereby driving the steel pipe 100. As the steel pipe 100 is driven, the No. 1 cylinder 33 drives the lifting frame 32 downward, causing the outer ring of the No. 4 ball bearing 39 to contact the upper edge of the steel pipe 100 until the No. 1 cylinder 33 reaches the end of its stroke, at which point the spring 38 compresses. As the steel pipe 100 is transported, the No. 4 ball bearing 39 maintains a rolling connection with the upper edge of the steel pipe 100.

[0051] In the above design, the structural design and specific implementation of the elastic pressure wheel mechanism 3 and the supporting and conveying mechanism 2 can effectively achieve stable conveyance of the steel pipe 100.

[0052] Specifically: Figure 5As shown, the through-type detection mechanism 4 includes a second lifting plate 41, a second worm gear 45 mounted on the base plate for driving the second lifting plate 41 upward and downward, a second handwheel 42 connected to the second worm gear 45, a through-type magnetic saturator 43 mounted on the lifting plate, and an annular eddy current sensor 44 positioned between the two ends of the through-type magnetic saturator 43. The through-type magnetic saturator 43 applies a sufficiently strong alternating or direct magnetic field to saturate the magnetization of the material being tested. Material defects or stress changes in the steel pipe 100 will disrupt the magnetic field distribution. The annular eddy current sensor 44 detects eddy current changes, thereby determining the surface defect status of the material. The through-type magnetic saturator 43 has two ends, separated by a gap.

[0053] When the steel pipe 100 is subjected to through-type detection, the No. 2 handwheel 42 is turned in advance to adjust the height of the No. 2 lifting plate 41 so that the through-type magnetic saturator 43 is adjusted to the operating height. Then, the steel pipe 100 enters the through-type magnetic saturator 43 at one end, passes through the annular eddy current sensor 44, and then passes through the other end of the through-type magnetic saturator 43.

[0054] In the above design, the structural design and specific implementation method of the through-type detection mechanism 4 can effectively adapt to different detection heights and can detect small defects.

[0055] The second embodiment provided by the present application is a detection method, which adopts the steel pipe rotation detection device. The steel pipe 100 is supported and conveyed by the supporting and conveying mechanism 2, the elastic pressure wheel mechanism 3 floats and presses the steel pipe 100 downward to cooperate with the supporting and conveying mechanism 2 to convey the steel pipe 100, the through-type detection mechanism 4 detects small defects on the surface of the steel pipe 100, and the rotating detection mechanism 5 detects large defects on the surface of the steel pipe 100.

[0056] To explain in further detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel pipe rotation detection device, comprising a frame (1), characterized in that: The invention also comprises a supporting conveying mechanism (2) arranged on the frame (1), an elastic pressure wheel mechanism (3) arranged on the frame (1), a through-type detection mechanism (4) arranged on the frame (1), and a rotation detection mechanism (5) arranged on the frame (1); the elastic pressure wheel mechanism (3) is used to cooperate with the supporting conveying mechanism (2) to convey the steel pipe (100); the through-type detection mechanism (4) and the rotation detection mechanism (5) are used to perform rotational eddy current detection on the outer surface of the steel pipe (100).

2. The steel pipe rotation detection device according to claim 1, characterized in that: The rotation detection mechanism (5) comprises a guide rail (51) arranged on the frame (1) along the Y-axis direction, a sliding seat (52) slidably arranged on the guide rail (51), a lifting assembly (53) arranged on the sliding seat (52), a rotation detection assembly (54) arranged on the upper end surface of the lifting assembly (53), and a locking assembly (55) arranged on the sliding seat (52). The steel pipe (100) is transported along the X-direction.

3. The steel pipe rotation detection device according to claim 2, characterized in that: The sliding assembly is used to slide on the guide rail (51) to drive the lifting assembly (53) and the rotating assembly to move synchronously, so that the rotating detection assembly (54) switches between the detection position and the non-detection position. The lifting assembly (53) is used to drive the rotating assembly to rise and fall, and the locking assembly (55) is used to lock the sliding seat (52) and the frame (1).

4. The steel pipe rotation detection device according to claim 2, characterized in that: The rotation detection assembly (54) includes a No. 1 bearing seat (542) arranged on the lifting assembly (53), a No. 1 ball bearing arranged on the No. 1 bearing seat (542), a through-hole shaft (543) connected to the inner ring of the No. 1 ball bearing, a No. 1 bracket (544) arranged on the No. 1 bearing seat (542), a synchronous belt (545), a motor (546) arranged on the bracket, a driving wheel (547) arranged on the rotating shaft of the motor (546), a driven wheel (548) coaxially fixedly arranged on the outer periphery of the through-hole shaft (543), a connecting plate (541) fixedly connected to the end face of the through-hole shaft (543), and at least one eddy current sensing assembly (549) arranged on the connecting plate (541) for detecting the steel pipe from the radial direction.

5. The steel pipe rotation detection device according to claim 4, characterized in that: The eddy current sensing assembly (549) includes a No. 1 rail (491) arranged on the connecting plate (541), a No. 1 slider (492) slidably arranged on the No. 1 rail (491), a No. 1 bolt (493) threadedly arranged on the No. 1 slider (492), a probe frame (496) fixedly arranged on the No. 1 slider (492), and a probe-type eddy current sensor (494) arranged on the probe frame (496), wherein the No. 1 rail (491) extends radially along the through-hole axis (543), and the No. 1 bolt (493) is used to lock the No. 1 slider (492) and the No. 1 rail (491); the probe frame (496) is also bolted with a connecting shaft and a No. 2 ball bearing (495) arranged on the connecting shaft, and the axis of the connecting shaft is perpendicular to the axis of the through-hole axis (543).

6. The steel pipe rotation detection device according to claim 2, characterized in that: The rotation detection mechanism (5) further includes a protective cover (56) arranged on the lifting assembly (53), the protective cover (56) including a lower box body arranged on the upper end surface of the lifting assembly (53), an upper box body arranged on one side of the lower box body through a hinge, and a buckle arranged on the other side of the lower box body for connecting with the upper box body, and when the upper box body and the lower box body are closed, a feed port and a discharge port corresponding to the two ends of the through-hole shaft (543) are formed respectively.

7. The steel pipe rotation detection device according to claim 2, characterized in that: The lifting assembly (53) comprises a first lifting plate (531), a first worm gear arranged on a bottom plate for driving the first lifting plate (531) to lift and lower, and a first hand wheel (533) connected to the first worm gear. The rotation detection assembly (54) is arranged on the first lifting plate (531).

8. The steel pipe rotation detection device according to claim 1, characterized in that: The elastic pressure wheel mechanism (3) comprises a support (31) arranged on the frame (1), a lifting frame (32) arranged on the support (31), a No. 1 air cylinder (33) fixedly arranged on the support (31) for driving the lifting frame (32) to move up and down, a linear bearing (34) arranged on the lifting frame (32), a lifting shaft (35) sleeved on the linear bearing (34), a fixing frame (36) fixedly arranged on the lower end of the lifting shaft (35), a limiting end (37) arranged on the upper end of the lifting shaft (35), and a spring (38) sleeved on the lifting shaft (35) with its two ends respectively abutting against the linear bearing (34) and the limiting end (37). ), a No. 4 ball bearing (39) is arranged at the lower end of the fixed frame (36), and the No. 4 ball bearing (39) is in rolling contact with the upper edge of the steel pipe (100) along the conveying direction of the steel pipe (100), and the supporting conveying mechanism (2) includes a plurality of No. 2 bearing seats (23) arranged on the frame (1), a plurality of No. 3 ball bearings respectively arranged on the No. 2 bearing seats (23), a plurality of rotating shafts (21) respectively connected to the inner rings of the No. 3 ball bearings in a one-to-one correspondence, a plurality of conveying wheels (22) respectively coaxially arranged on the rotating shafts (21), and a sprocket chain drive assembly arranged on the frame (1) for driving the plurality of rotating shafts (21) to rotate synchronously.

9. The steel pipe rotation detection device according to claim 1, characterized in that: The through-type detection mechanism (4) comprises a second lifting plate (41), a second worm gear (45) arranged on a bottom plate for driving the second lifting plate (41) to lift and lower, a second hand wheel (42) in transmission connection with the second worm gear (45), a through-type magnetic saturator (43) arranged on the lifting plate, and an annular eddy current sensor (44) arranged between two ends of the through-type magnetic saturator (43).

10. A detection method, using the steel pipe rotation detection device according to any one of claims 1 to 9, characterized in that: The steel pipe (100) is carried and conveyed by the carrying and conveying mechanism (2); the elastic pressing wheel mechanism (3) floats and presses the steel pipe (100) downward to cooperate with the carrying and conveying mechanism (2) to convey the steel pipe (100); the through-type detection mechanism (4) detects small defects on the surface of the steel pipe (100); and the rotating detection mechanism (5) detects large defects on the surface of the steel pipe (100).

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