Flaw detection device suitable for steel pipes with different pipe diameters

Abstract

The invention discloses a flaw detection device suitable for steel pipes with different pipe diameters, and particularly relates to the technical field of steel pipe detection, and the flaw detection device suitable for the steel pipes with different pipe diameters comprises a base; the inner circle supporting frame is mounted at the top of the base; the limiting supports capable of synchronously and centripetally moving are arranged on the inner circumference between the limiting supports and the inner circle supporting frame. The flaw detection mechanism is arranged on the inner circle supporting frame at one end, the limiting support comprises an L-shaped frame and limiting conveying rollers, and the limiting conveying rollers are rotationally connected to the two sides of the L-shaped frame; the flaw detection mechanism comprises a detection ring plate and a flaw detection module, and the flaw detection module is slidably connected to the inner circumference of the detection ring plate and can synchronously move centripetally with the limiting conveying rollers. And through the synchronous adjusting assembly, the flaw detection module can move together with the limiting bracket, so that the flaw detection precision is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipe detection, in particular to a steel pipe flaw detection device suitable for different pipe diameters. BACKGROUND

[0002] After batch production of steel pipes, the surface of the steel pipes needs to be detected for flaw detection. The steel pipes can be detected by means of a flaw detector to investigate the pipe wall condition. In order to realize efficient and comprehensive inspection of the steel pipes, the steel pipes are generally passed through the flaw detector one by one, and the steel pipes are batched according to the flaw detection results. The patent application with the publication number "CN119643699A" specifically discloses a seamless steel pipe flaw detection device, which comprises a base, a fixing ring, a rotating ring and a driving mechanism. The fixing ring is vertically arranged on the top surface of the middle part of the base, the rotating ring is coaxially connected to the end surface of the fixing ring, the inner side wall of the rotating ring is provided with an ultrasonic flaw detection instrument, the outer peripheral surface of the rotating ring is coaxially fixedly connected with a first gear ring, the driving mechanism is arranged on the outer wall of the fixing ring, the driving mechanism comprises a first motor and a first gear, the first motor is horizontally mounted on the outer wall of the fixing ring, and the first motor is a brake motor. The first gear is coaxially fixedly connected to the output end of the first motor, the first gear is engaged with the first gear ring, a pair of support frames are arranged on the top surface of the base, the support frames are respectively located on the two sides of the axis of the fixing ring, each support frame is provided with a feeding mechanism for conveying and moving the steel pipe. Although the feeding mechanism on the support frame away from the fixing ring side of the rotating ring conveys the steel pipe, when the steel pipe moves into the rotating ring, the ultrasonic flaw detection instrument detects the steel pipe, and the driving mechanism drives the rotating ring to rotate, so that the ultrasonic flaw detection instrument rotates around the outer periphery of the steel pipe to detect. In the process of continuously feeding the steel pipe, the ultrasonic flaw detection instrument automatically completes the flaw detection of the whole steel pipe, reduces the trouble of manual flaw detection, and improves the work efficiency and accuracy of the detection results. However, when detecting steel pipes of different sizes, the ultrasonic flaw detection instrument is fixedly arranged, so that the distance between the ultrasonic flaw detection instrument and the steel pipe is different when detecting steel pipes of different sizes, especially when detecting steel pipes of smaller sizes, the distance is larger, which affects the accuracy of the detection. Therefore, we propose a steel pipe flaw detection device suitable for different pipe diameters and a method to solve the above problems. SUMMARY

[0003] The purpose of the present application is to provide a steel pipe flaw detection device suitable for different pipe diameters to solve the problems in the background art.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a steel pipe flaw detection device suitable for different pipe diameters, comprising: a base; An inner circular support frame is provided, wherein a plurality of inner circular support frames are arranged sequentially on the top of the base; The limiting brackets are provided with several interconnected limiting brackets that can move centripetally synchronously between the inner circumferences of the inner circular support brackets. The flaw detection mechanism has a flaw detection mechanism that can detect flaws in steel pipes on the inner circumference of an inner circular support frame at one end. The flaw detection mechanism can rotate along the inner circumference of the inner circular support frame. The limiting bracket includes an L-shaped frame and limiting conveying rollers, the limiting conveying rollers being rotatably connected to both sides of the L-shaped frame; The flaw detection mechanism includes a detection ring plate and a flaw detection module. The flaw detection module is slidably connected to the inner circumference of the detection ring plate and can move centripetally synchronously with the limited conveying roller. A synchronous adjustment component is connected between the L-shaped frame and the flaw detection module, and a synchronous linkage component is connected between the detection ring plate and the detection probe. The rotation of the detection ring plate can drive the detection probe to rotate synchronously through the synchronous linkage component to transport the steel pipe.

[0005] Preferably, the synchronous linkage component includes a first gear linkage module, an adaptive transmission wheel module, and a second gear linkage module; The adaptive transmission wheel module and the second gear linkage module are both located inside the L-shaped frame and are connected to each other. The first gear linkage module is slidably connected to the outside of the L-shaped frame and extends into the L-shaped frame to connect with the adaptive transmission wheel module. The first gear linkage module is connected to the outside of the detection ring plate.

[0006] Preferably, the inner circular support frame includes a supporting outer frame, an inner supporting ring, and a defining connecting rod; The supporting outer frame is installed on the top of the base; The inner circumference of the supporting outer frame is equipped with a limiting connecting rod pointing to the center of the circle, and the inner end of the limiting connecting rod is equipped with an inner supporting ring. The L-shaped frames are connected to each other, and the L-shaped frames are slidably connected to the limiting connecting rod. The inner support ring connected to the flaw detection mechanism has a hollow cavity inside. The inner side of the cavity and the side wall near the end of the limiting conveying roller are both open. The detection ring plate is rotatably connected to the opening on the inner side of the cavity. The opening on the side wall at the end of the cavity is connected by bolts to an annular cover plate that is movably sleeved with the end of the detection ring plate. A first spring is slidably connected to the outer wall of the cavity. The outer end of the first spring extends out of the cavity and is connected to the L-shaped frame. A transmission guide post is sleeved on the first spring. The two ends of the transmission guide post are respectively connected to the outer side of the L-shaped frame and the inner support ring.

[0007] Preferably, the synchronous adjusting assembly is a synchronous adjusting ring, the synchronous adjusting ring is in the shape of a parallelogram in cross section and has two oblique sides, the synchronous adjusting ring is slidingly connected in the cavity, and the other two sides of the synchronous adjusting ring are in contact with the side wall of the cavity and the outer side of the detection ring plate respectively and can move in the axial direction of the detection ring plate. The first spring inner end and the flaw detection module are in contact with the two oblique sides of the synchronous adjusting ring in the cavity respectively.

[0008] Preferably, the flaw detection module comprises a detection probe, an adjusting guide column and a second spring. The adjusting guide column is slidingly connected in the middle of the detection ring plate, the inner end of the adjusting guide column passes through the detection ring plate and is connected with the detection probe, the outer end of the adjusting guide column passes through the detection ring plate and is in contact with the synchronous adjusting ring, and the second spring is connected between the outer side of the detection ring plate and the outer end of the adjusting guide column.

[0009] Preferably, the device further comprises a driving mechanism, and the driving mechanism is installed on the inner circular support frame at the end of the relative synchronous linkage assembly. The driving mechanism comprises a first driving motor, a transmission inner gear ring, a first plane gear, and a circular slide column. The first driving motor is installed on the outer side of the inner circular support frame, the output shaft of the first driving motor extends into the inner circular support frame and is connected with the first plane gear. The transmission inner gear ring is rotationally connected in the inner circular support frame, the inner side of the transmission inner gear ring is in gear engagement with the first plane gear, an arc-shaped through slot gradually approaching the center of the circle is provided through the transmission inner gear ring, the circular slide column is slidingly connected in the arc-shaped through slot, and the circular slide column is installed on the L-shaped frame.

[0010] Preferably, the first gear linkage module comprises a third plane gear, a first linkage sleeve, a linkage shaft, a second linkage sleeve, a third spring, and an outer gear ring. The outer gear ring is in linkage insertion at the end of the detection ring plate and is in contact with the annular cover plate, and the third plane gear is in gear engagement with the outer side of the outer gear ring. One end of the first linkage sleeve is in linkage insertion with the third plane gear through the annular cover plate, the other end of the first linkage sleeve is slidingly connected with the linkage shaft, one end of the linkage shaft extends out of the first linkage sleeve and is in linkage insertion with the second linkage sleeve, the end of the linkage shaft in the first linkage sleeve is connected with the third spring, and the end of the third spring is connected with the first linkage sleeve.

[0011] Preferably, the self-adapting transmission wheel module comprises a transmission wheel, a transmission belt, an adjusting frame, a traction wheel, a fourth spring, and a driven wheel. The side wall of the L-shaped frame is provided with a straight sliding groove, the second linkage sleeve is installed on one side of the transmission wheel and is slidingly connected in the straight sliding groove; The driven wheel is connected in the L-shaped frame through a shaft pin and is directly below the transmission wheel, the opposite adjusting frames which can be away from the transmission wheel and the driven wheel are slidingly connected in the L-shaped frame, the fourth spring is installed between the adjusting frames, the stretching wheel is connected to the end of the adjusting frame through a shaft pin, and the outer sides of the transmission wheel, the stretching wheel and the driven wheel are collectively sleeved with a transmission belt.

[0012] Preferably, the second gear linkage module comprises a transmission rod, a first bevel gear, a second bevel gear and a driving rod. The transmission rod is installed on one side of the driven wheel, and the first bevel gear is installed at the end of the transmission rod. The driving rod is rotationally connected in the L-shaped frame, the two ends of the driving rod are extended out of the L-shaped frame and are connected with the limiting conveying rollers respectively, the second bevel gear is installed at the middle segment of the second bevel gear, and the first bevel gear is in gear engagement with the second bevel gear.

[0013] Preferably, the device further comprises a transmission mechanism, and the transmission mechanism comprises a second driving motor and a second plane gear. The second driving motor is installed on the outer side of the annular cover plate, the output shaft of the second driving motor is extended into the annular cover plate and is connected with the second plane gear, and the second plane gear is in gear engagement with the outer side of the outer tooth ring.

[0014] Compared with the prior art, the device has the following beneficial effects: 1. The steel pipe flaw detection device suitable for different pipe diameters can automatically move the flaw detection module along with the limiting support when the limiting support is adjusted according to the pipe diameter of the steel pipe, so that the flaw detection module can always keep a relatively close distance from the steel pipe, and the distance from the steel pipe after adjustment is avoided, so as to affect the accuracy of flaw detection.

[0015] 2. The steel pipe flaw detection device suitable for different pipe diameters can drive the flaw detection module to rotate and detect the steel pipe, drive the limiting conveying roller to rotate, stop the conveying of the steel pipe when the damage of the steel pipe is detected, and stop the rotation of the flaw detection module, so that the position of the flaw detection module is the position of the damage of the steel pipe, so that the position of the damage is more intuitively displayed, the specific position of the damage is easy to understand, and the subsequent repair is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 Structure schematic diagram of the present application; Figure 2 Structure schematic diagram of the present application; Figure 3 Structure schematic diagram of the present application; Figure 4 Structure schematic diagram of the present application; Figure 5 Structure schematic diagram of the present application; Figure 6 Structure schematic diagram of the present application; Figure 7 Structure schematic diagram of the present application; Figure 8 Structure schematic diagram of the present application; Figure 9 Structure schematic diagram of the present application Figure 2 Structure schematic diagram of the present application Figure 10 Structure schematic diagram of the present application Figure 4 Structure schematic diagram of the present application

[0018] In the figure: 1, base; 2, inner circle support frame; 201, support outer frame; 202, inner support ring; 203, limit connecting rod; 3, driving mechanism; 301, first driving motor; 302, transmission inner gear ring; 303, first plane gear; 304, arc-shaped through slot; 305, circular slide column; 4, limiting support; 401, L-shaped frame; 402, limit conveying roller; 403, straight sliding groove; 404, transmission guide column; 405, first spring; 5, transmission mechanism; 501, second driving motor; 502, second plane gear; 6, flaw detection mechanism; 601, detection ring plate; 602, detection probe; 603, adjusting guide column; 604, second spring; 701, third plane gear; 702, first linkage sleeve; 703, linkage shaft; 704, second linkage sleeve; 705, third spring; 706, outer gear ring; 711, transmission wheel; 712, transmission belt; 713, adjusting frame; 714, traction wheel; 715, fourth spring; 716, driven wheel; 721, transmission rod; 722, first bevel gear; 723, second bevel gear; 724, driving rod; 8, synchronous adjusting ring; 9, annular cover plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Embodiment: as shown in the figure, the present application provides a steel pipe flaw detection device suitable for different pipe diameters, comprising: Figures 1-10 a base 1; an inner circle support frame 2, a plurality of inner circle support frames 2 are sequentially arranged on the top of the base 1; a limiting support 4, a plurality of limiting supports 4 capable of moving synchronously towards the center are arranged on the inner circle between the inner circle support frames 2; a flaw detection mechanism 6, a flaw detection mechanism 6 capable of detecting steel pipes is arranged on the inner circle of one end of the inner circle support frame 2, and the flaw detection mechanism 6 can rotate along the inner circle of the inner circle support frame 2; the limiting support 4 comprises an L-shaped frame 401 and a limit conveying roller 402, and the limit conveying roller 402 is rotationally connected to the two sides of the L-shaped frame 401; the flaw detection mechanism 6 comprises a detection ring plate 601 and a flaw detection module, the flaw detection module is slidingly connected to the inner circle of the detection ring plate 601 and can move synchronously towards the center with the limit conveying roller 402; the flaw detection module comprises a detection ring plate 601 and a flaw detection module, the flaw detection module is slidingly connected to the inner circle of the detection ring plate 601 and can move synchronously towards the center with the limit conveying roller 402; The L-shaped frame 401 is connected with the flaw detection module, the synchronous adjusting assembly is connected between the detection ring plate 601 and the detection probe 602, and the rotation of the detection ring plate 601 can drive the detection probe 602 to rotate synchronously to convey the steel pipe.

[0021] It should be noted that, through the synchronous adjusting assembly, when the limiting support 4 adjusts according to the pipe diameter of the steel pipe, the flaw detection module can automatically move together with the limiting support 4, so that the flaw detection module can always maintain a relatively close distance from the steel pipe, avoiding the case that the distance from the steel pipe is far after adjustment, thereby affecting the precision of flaw detection, and the flaw detection module rotates to detect the steel pipe, thereby making the flaw detection more comprehensive, and through the synchronous linkage assembly, after the limiting support 4 and the flaw detection module are adjusted, the limiting conveying roller 402 can synchronously convey the steel pipe through the driving of the rotation of the flaw detection module, that is, when the flaw detection module stops rotating after detecting that the steel pipe has a damage, the position of the flaw detection module is the position of the damage of the steel pipe, thereby making the position of the damage more intuitive, facilitating understanding of the specific position of the damage and facilitating subsequent repair, and the linkage mode increases the coordination between them; And the synchronous movement of the limiting conveying roller 402 can always be on the same center axis when limiting different sizes of steel pipes, thereby ensuring that the distance between the steel pipe and the flaw detection module is the same, thereby improving the precision of flaw detection; Here, the centripetal movement is that the extension line of the movement trajectory intersects with the center axis of the steel pipe.

[0022] Further, the synchronous linkage assembly comprises a first gear linkage module, an adaptive transmission wheel module and a second gear linkage module. The adaptive transmission wheel module and the second gear linkage module are both arranged in the L-shaped frame 401 and connected with each other, the first gear linkage module is slidingly connected to the outside of the L-shaped frame 401 and extends into the L-shaped frame 401 to be connected with the adaptive transmission wheel module, and the first gear linkage module is connected with the outside of the detection ring plate 601.

[0023] It should be noted that, when the limiting conveying roller 402 and the flaw detection module are adjusted, the adaptive transmission wheel module can be adaptively adjusted to ensure that the first gear linkage module and the second gear linkage module can always be in transmission, thereby ensuring that the limiting conveying roller 402 and the flaw detection module can still be smoothly transmitted after multi-diameter adjustment, thereby making the use more convenient.

[0024] Further, the inner circular support frame 2 comprises a support outer frame 201, an inner support circular ring 202 and a limiting connecting rod 203; The support outer frame 201 is installed on the top of the base 1. The inner circumference of the support outer frame 201 is provided with the limiting connecting rod 203 pointing to the center of the circle, the inner end of the limiting connecting rod 203 is provided with the inner support circular ring 202, the L-shaped frame 401 is connected between the L-shaped frame 401 and the limiting connecting rod 203. The inner side of the inner support circular ring 202 connected with the flaw detection mechanism 6 is provided with a hollow cavity, the inner side of the cavity and the side wall close to the end of the limiting conveying roller 402 are in an open state, the detection ring plate 601 is rotationally connected to the opening of the inner side of the cavity, and the opening of the end side wall of the cavity is connected with the annular cover plate 9 in a circular ring shape. The outer side wall of the cavity is slidably connected with the first spring 405, the outer end of the first spring 405 extends out of the cavity and is connected with the L-shaped frame 401, and the transmission guide column 404 is sleeved on the first spring 405, and the two ends of the transmission guide column 404 are respectively connected with the outer side of the L-shaped frame 401 and the inner support circular ring 202.

[0025] It should be noted that the installation of the annular cover plate 9 makes the disassembly of the flaw detection mechanism 6 more convenient, and under the limitation of the limiting connecting rod 203, the L-shaped frame 401 can stably move, and the rotation of the detection ring plate 601 is more stable through the limitation of the annular cover plate 9, and the first spring 405 can move under the driving of the L-shaped frame 401.

[0026] Specifically, the synchronous adjusting assembly is a synchronous adjusting ring 8, the cross section of the synchronous adjusting ring 8 is a parallelogram, and there are two oblique sides, the synchronous adjusting ring 8 is slidably connected in the cavity, and the other two sides of the synchronous adjusting ring 8 are respectively in contact with the side wall of the cavity and the outer side of the detection ring plate 601, and can move along the axial direction of the detection ring plate 601. The inner end of the first spring 405 and the flaw detection module are respectively in contact with the two oblique sides of the synchronous adjusting ring 8 in the cavity.

[0027] It should be noted that the movement of the first spring 405 enables the synchronous adjusting ring 8 to move, and then the flaw detection assembly can move synchronously through the movement of the synchronous adjusting ring 8.

[0028] Specifically, the flaw detection module comprises a detection probe 602, an adjusting guide column 603 and a second spring 604. The adjusting guide column 603 is slidingly connected to the middle of the detection ring plate 601, and the inner end of the adjusting guide column 603 is connected with the detection probe 602 through the detection ring plate 601, the outer end of the adjusting guide column 603 is in contact with the synchronous adjusting ring 8 through the detection ring plate 601, and the second spring 604 is connected between the outer side of the detection ring plate 601 and the outer end of the adjusting guide column 603.

[0029] It should be noted that the adjusting guide column 603 can move on the detection ring plate 601, and the moving track is also centripetal movement, under the action of the elastic force of the second spring 604, the adjusting guide column 603 can always be in contact with the synchronous adjusting ring 8, and can push the synchronous adjusting ring 8 to reset, and under the driving of the movement of the synchronous adjusting ring 8, the adjusting guide column 603 can drive the detection probe 602 to adjust correspondingly.

[0030] Further, the device further comprises a driving mechanism 3, the driving mechanism 3 is installed on the inner circular support frame 2 at the end of the relative synchronous linkage assembly, The driving mechanism 3 comprises a first driving motor 301, a transmission inner gear ring 302, a first plane gear 303, and a circular slide column 305. The first driving motor 301 is installed on the outer side of the inner circular support frame 2, and the output shaft of the first driving motor 301 extends into the inner circular support frame 2 and is connected with the first plane gear 303. The transmission inner gear ring 302 is rotationally connected in the inner circular support frame 2, the inner side of the transmission inner gear ring 302 is in gear with the first plane gear 303, an arc-shaped through groove 304 gradually approaching the center of the circle is provided through the transmission inner gear ring 302, the circular slide column 305 is slidingly connected in the arc-shaped through groove 304, and the circular slide column 305 is installed on the L-shaped frame 401.

[0031] It should be noted that under the driving of the output shaft of the first driving motor 301, the transmission inner gear ring 302 rotates, at this time the circular slide column 305 is in relative rotation in the arc-shaped through groove 304, and the moving track of the L-shaped frame 401 is fixed, so the circular slide column 305 can drive the L-shaped frame 401 to move, and the first plane gear 303 is connected with the inner circular support frame 2 through the shaft pin and rotates at a fixed position in the inner circular support frame 2.

[0032] Specifically, the first gear linkage module comprises a third plane gear 701, a first linkage sleeve 702, a linkage shaft 703, a second linkage sleeve 704, a third spring 705, and an outer gear ring 706. The outer gear ring 706 is in linkage insertion at the end of the detection ring plate 601 and in contact with the annular cover plate 9, and the third plane gear 701 is in gear with the outer side of the outer gear ring 706. One end of the first linkage sleeve 702 is in linkage with the third bevel gear 701 through the annular cover plate 9, and the other end of the first linkage sleeve 702 is slidably connected with a linkage shaft 703, one end of the linkage shaft 703 extends out of the first linkage sleeve 702 and is in linkage with a second linkage sleeve 704, and the end of the linkage shaft 703 in the first linkage sleeve 702 is connected with a third spring 705, and the end of the third spring 705 is connected with the first linkage sleeve 702.

[0033] It should be noted that the linkage here is a linkage that can rotate while being inserted, such as a multi-ribbed cylindrical insertion, etc. Through the insertion between the linkage shaft 703 and the second linkage sleeve 704, the linkage shaft 703 can be separated from the second linkage sleeve 704, thereby disconnecting the first gear linkage module and the self-adaptive transmission wheel module, and then through the disassembly of the annular cover plate 9, the flaw detection mechanism 6 and the synchronous adjusting ring 8 can be disassembled and repaired, and under the action of the elastic force of 605, the linkage shaft 703 can be stably inserted with the second linkage sleeve 704, ensuring the stability of the transmission therebetween.

[0034] Specifically, the self-adaptive transmission wheel module comprises a transmission wheel 711, a transmission belt 712, an adjusting frame 713, a tension wheel 714, a fourth spring 715, and a driven wheel 716. The side wall of the L-shaped frame 401 is provided with a straight sliding groove 403, the second linkage sleeve 704 is installed on one side of the transmission wheel 711, and the second linkage sleeve 704 is slidably connected in the straight sliding groove 403; The driven wheel 716 is connected to the L-shaped frame 401 through an axle pin and is directly below the transmission wheel 711, the L-shaped frame 401 slidably connects the opposite adjusting frames 713 which can be away from the transmission wheel 711 and the driven wheel 716, the fourth spring 715 is installed between the adjusting frames 713, the adjusting frames 713 are connected with the tension wheel 714 through an axle pin at the end, and the outer sides of the transmission wheel 711, the tension wheel 714 and the driven wheel 716 are collectively sleeved with the transmission belt 712.

[0035] It should be noted that under the elastic force of the fourth spring 715, the adjusting frame 713 can be adapted to slide, and the tension wheel 714 can drive the transmission belt 712 to be pushed, so that the transmission belt 712 can always be in a tight state, ensuring the friction force between the transmission belt 712 and the transmission wheel 711, the tension wheel 714 and the driven wheel 716, thereby ensuring that the transmission wheel 711 and the driven wheel 716 can always maintain a transmission connection relationship.

[0036] Specifically, the second gear linkage module comprises a transmission rod 721, a first helical gear 722, a second helical gear 723 and a drive rod 724; The transmission rod 721 is mounted on one side of the driven wheel 716, and the end of the transmission rod 721 is provided with the first helical gear 722; The drive rod 724 is rotatably connected in the L-shaped frame 401, and the two ends of the drive rod 724 extend out of the L-shaped frame 401 and are connected with the limiting conveying roller 402, respectively.

[0037] It should be noted that the first helical gear 722 drives the second helical gear 723 to rotate, and the drive rod 724 can be driven to rotate, so that the limiting conveying roller 402 can smoothly rotate to convey the steel pipe.

[0038] Further, the device further comprises a transmission mechanism 5, and the transmission mechanism 5 comprises a second drive motor 501 and a second plane gear 502, The second drive motor 501 is mounted on the outer side of the annular cover plate 9, and the output shaft of the second drive motor 501 extends into the annular cover plate 9 and is connected with the second plane gear 502.

[0039] It should be noted that under the drive of the output shaft of the second drive motor 501, the second plane gear 502 can rotate, and the outer tooth ring 706 can rotate to drive the detection ring plate 601 and the third plane gear 701 to rotate.

[0040] In summary, the steel pipe flaw detection device suitable for different pipe diameters is used, and under the drive of the output shaft of the first drive motor 301, the first plane gear 303 rotates and drives the transmission inner tooth ring 302 to rotate, and then the circular slide column 305 moves relatively in the arc-shaped through groove 304, so that the L-shaped frame 401 can move, and under the drive of the L-shaped frame 401, the limiting conveying roller 402 can move together and can contact the steel pipe and can limit the roundness of the steel pipe. Under the drive of the L-shaped frame 401, the first spring 405 can move, and under the common action of the transmission guide column 404 and the second spring 604, the first spring 405 and the adjusting guide column 603 can always contact the synchronous adjusting ring 8, and through the movement of the synchronous adjusting ring 8, the adjusting guide column 603 can move synchronously to adapt to the adjustment of the detection probe 602, so that the detection probe 602 can keep a relatively close distance to the steel pipe for flaw detection. Under the driving of the second driving motor 501 output shaft, the second plane gear 502 can rotate, and under the driving of the second plane gear 502, the outer tooth ring 706 can drive the detection ring plate 601 to rotate, and then the detection probe 602 can rotate to detect the steel pipe, and under the driving of the outer tooth ring 706, the third plane gear 701 can rotate, and then drive the first linkage sleeve 702 to rotate, drive the second linkage sleeve 704 through the linkage shaft 703, so that the transmission wheel 711 can rotate, and through the transmission of the transmission belt 712, the driven wheel 716 can rotate, and through the transmission rod 721, the first bevel gear 722 is driven to rotate, and under the driving of the first bevel gear 722, the second bevel gear 723 can rotate, and through the driving rod 724, the limiting conveying roller 402 is driven, and through the rotation of the limiting conveying roller 402, the steel pipe can be conveyed; The linkage shaft 703 is moved to be separated from the second linkage sleeve 704, then the bolt on the annular cover plate 9 is screwed to detach the annular cover plate 9, then the L-shaped frame 401 is moved away from the steel pipe, and then the outer tooth ring 706 is detached, so that the synchronous adjusting ring 8 and the detection mechanism 6 can be detached for maintenance.

[0041] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A flaw detection device for steel pipes of different diameters, characterized in that, Including: Base (1); Inner circular support frame (2), a number of inner circular support frames (2) are installed on the top of the base (1) in sequence. Limiting bracket (4): Several limiting brackets (4) that are connected to each other and can move in a centripetal manner synchronously are provided on the inner circumference between the inner circular support brackets (2). The flaw detection mechanism (6) has a flaw detection mechanism (6) that can detect flaws in steel pipes on the inner circumference of the inner circular support frame (2) at one end. The flaw detection mechanism (6) can rotate along the inner circumference of the inner circular support frame (2). The limiting bracket (4) includes an L-shaped frame (401) and a limiting conveying roller (402), the limiting conveying roller (402) being rotatably connected to both sides of the L-shaped frame (401); The flaw detection mechanism (6) includes a detection ring plate (601) and a flaw detection module. The flaw detection module is slidably connected to the inner circumference of the detection ring plate (601) and can move centripetally synchronously with the limited conveying roller (402). A synchronous adjustment component is connected between the L-shaped frame (401) and the flaw detection module, and a synchronous linkage component is connected between the detection ring plate (601) and the detection probe (602). The rotation of the detection ring plate (601) can drive the detection probe (602) to rotate synchronously to transport the steel pipe.

2. The flaw detection device for steel pipes of different diameters according to claim 1, characterized in that: The synchronous linkage component includes a first gear linkage module, an adaptive transmission wheel module, and a second gear linkage module; The adaptive transmission wheel module and the second gear linkage module are both located inside the L-shaped frame (401) and are connected to each other. The first gear linkage module is slidably connected to the outside of the L-shaped frame (401) and extends into the L-shaped frame (401) to connect with the adaptive transmission wheel module. The first gear linkage module is connected to the outside of the detection ring plate (601).

3. The flaw detection device for steel pipes of different diameters according to claim 2, characterized in that: The inner circular support frame (2) includes an outer support frame (201), an inner support ring (202), and a limiting connecting rod (203). The supporting outer frame (201) is installed on the top of the base (1); The inner circumference of the supporting outer frame (201) is equipped with a limiting connecting rod (203) pointing to the center of the circle, and the inner end of the limiting connecting rod (203) is equipped with an inner supporting ring (202). The L-shaped frames (401) are connected to each other, and the L-shaped frames (401) are slidably connected to the limiting connecting rod (203). The inner support ring (202) connected to the flaw detection mechanism (6) has a hollow cavity inside. The inner side of the cavity and the side wall near the end of the limiting conveying roller (402) are open. The detection ring plate (601) is rotatably connected to the opening on the inner side of the cavity. The opening on the side wall at the end of the cavity is connected by bolts to an annular cover plate (9) that is movably sleeved with the end of the detection ring plate (601). A first spring (405) is slidably connected to the outer wall of the cavity. The outer end of the first spring (405) extends out of the cavity and is connected to the L-shaped frame (401). A transmission guide post (404) is sleeved on the first spring (405). The two ends of the transmission guide post (404) are respectively connected to the outer side of the L-shaped frame (401) and the inner support ring (202).

4. The flaw detection device for steel pipes of different diameters according to claim 3, characterized in that: The synchronous adjustment component is a synchronous adjustment ring (8). The synchronous adjustment ring (8) has a parallelogram cross-section and two inclined sides. The synchronous adjustment ring (8) is slidably connected in the cavity. The other two sides of the synchronous adjustment ring (8) are in contact with the side wall of the cavity and the outer side of the detection ring plate (601), respectively, and can move along the axial direction of the detection ring plate (601). The inner end of the first spring (405) and the flaw detection module are respectively in contact with the two inclined sides of the synchronous adjustment ring (8) in the cavity.

5. The flaw detection device for steel pipes of different diameters according to claim 4, characterized in that: The flaw detection module includes a detection probe (602), an adjustment guide post (603), and a second spring (604). The adjusting guide post (603) is slidably connected to the middle of the detection ring plate (601), and the inner end of the adjusting guide post (603) passes through the detection ring plate (601) and is connected to the detection probe (602). The outer end of the adjusting guide post (603) passes through the detection ring plate (601) and is in contact with the synchronous adjusting ring (8). A second spring (604) is connected between the outer side of the detection ring plate (601) and the outer end of the adjusting guide post (603).

6. The flaw detection device for steel pipes of different diameters according to claim 5, characterized in that: The device also includes a drive mechanism (3), which is mounted on an inner circular support frame (2) at the end of a relative synchronous linkage component; The drive mechanism (3) includes a first drive motor (301), a transmission internal gear ring (302), a first planar gear (303), and a circular slide column (305); The first drive motor (301) is installed on the outside of the inner circular support frame (2), and the output shaft of the first drive motor (301) extends into the inner circular support frame (2) and is connected to the first planar gear (303). The transmission internal gear ring (302) is rotatably connected to the inner circular support frame (2). The inner side of the transmission internal gear ring (302) meshes with the first planar gear (303). An arc-shaped through groove (304) gradually approaches the center of the circle is opened through the transmission internal gear ring (302). A circular sliding column (305) is slidably connected in the arc-shaped through groove (304). The circular sliding column (305) is installed on the L-shaped frame (401).

7. The flaw detection device for steel pipes of different diameters according to claim 6, characterized in that: The first gear linkage module includes a third planar gear (701), a first linkage sleeve (702), a linkage shaft (703), a second linkage sleeve (704), a third spring (705), and an external gear ring (706). The external gear ring (706) is inserted into the end of the detection ring plate (601) and contacts the annular cover plate (9). The third planar gear (701) meshes with the outer side of the external gear ring (706). One end of the first linkage sleeve (702) passes through the annular cover plate (9) and is linked to the third planar gear (701). The other end of the first linkage sleeve (702) is slidably connected to a linkage shaft (703). One end of the linkage shaft (703) extends out of the first linkage sleeve (702) and is linked to the second linkage sleeve (704). The end of the linkage shaft (703) inside the first linkage sleeve (702) is connected to a third spring (705). The end of the third spring (705) is connected to the first linkage sleeve (702).

8. The flaw detection device for steel pipes of different diameters according to claim 7, characterized in that: The adaptive transmission wheel module includes a transmission wheel (711), a transmission belt (712), an adjustment frame (713), a tension wheel (714), a fourth spring (715), and a driven wheel (716). The side wall of the L-shaped frame (401) is provided with a straight sliding groove (403), and the second linkage sleeve (704) is installed on one side of the transmission wheel (711), and the second linkage sleeve (704) is slidably connected in the straight sliding groove (403). The driven wheel (716) is connected to the L-shaped frame (401) by a pin and is located directly below the drive wheel (711). The L-shaped frame (401) has a slidingly connected adjusting frame (713) that is away from the drive wheel (711) and the driven wheel (716). A fourth spring (715) is installed between the adjusting frames (713). The end of the adjusting frame (713) is connected to a tension wheel (714) by a pin. The drive wheel (711), the tension wheel (714) and the driven wheel (716) are all fitted with a drive belt (712).

9. The flaw detection device for steel pipes of different diameters according to claim 8, characterized in that: The second gear linkage module includes a transmission rod (721), a first helical gear (722), a second helical gear (723), and a drive rod (724). A transmission rod (721) is installed on one side of the driven wheel (716), and a first helical gear (722) is installed at the end of the transmission rod (721). A drive rod (724) is rotatably connected inside the L-shaped frame (401). The two ends of the drive rod (724) extend out of the L-shaped frame (401) and are respectively connected to the limiting conveying roller (402). The second helical gear (723) is installed in the middle section of the second helical gear (723). The first helical gear (722) meshes with the second helical gear (723).

10. The flaw detection device for steel pipes of different diameters according to claim 9, characterized in that: The device also includes a transmission mechanism (5), which includes a second drive motor (501) and a second planar gear (502). The second drive motor (501) is installed on the outside of the annular cover plate (9). The output shaft of the second drive motor (501) extends into the annular cover plate (9) and is connected to a second planar gear (502). The second planar gear (502) meshes with the outside of the external gear ring (706).

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