A steel pipe diameter detection device

Abstract

This invention relates to the field of steel pipe diameter detection and discloses a steel pipe diameter detection device, including a fixed platform and a steel pipe outer diameter detection mechanism and a steel pipe inner diameter detection mechanism. The steel pipe outer diameter detection mechanism includes a steel pipe guiding assembly set above the fixed platform, an outer diameter detection assembly set between two sets of steel pipe guiding assemblies, and a length measuring assembly set on one side of each of the two sets of outer diameter detection assemblies. When the steel pipe inner diameter detection mechanism moves, if a depression or bulge appears on the inner wall of the steel pipe, a large spring pushes a sliding vertical rod to move towards the inner wall of the steel pipe, or the inner wall of the steel pipe presses against the bonding plate to move the sliding vertical rod into the sliding vertical groove. When the sliding vertical rod moves, it drives the pinion to rotate. The detection assembly in the connecting block determines the moving distance of the sliding vertical rod by monitoring the rotation amplitude of the pinion, thereby obtaining data information on the depression or bulge inside the steel pipe and uploading the information to the control board for display. The detection is convenient and fast and will not affect subsequent steel pipe repair work.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe diameter detection, and in particular to a steel pipe diameter detection device. Background Art

[0002] Steel pipes have hollow cross-sections, and their length is much greater than their diameter or circumference. According to the cross-sectional shape, they are divided into round, square, rectangular and special-shaped steel pipes; according to the material, they are divided into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes and composite steel pipes; according to the purpose, they are divided into steel pipes for pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc.; according to the production process, they are divided into seamless steel pipes and welded steel pipes, of which seamless steel pipes are divided into hot-rolled and cold-rolled (drawn), and welded steel pipes are divided into straight seam welded steel pipes and spiral seam welded steel pipes. The diameter measurement of steel pipes is to measure the diameter of the cross-sectional position of the outside or inner wall of the steel pipe;

[0003] The patent application number CN202220810368.4 provides an alloy steel pipe diameter detection device, including a connecting ridge, both ends of the connecting ridge are sleeved with sliding sleeves, the lower ends of the two sliding sleeves are fixedly connected to abutment rods, one end of the connecting ridge is provided with a scale line, the upper ends of the two sliding sleeves are fixedly connected to columns, and a moving mechanism is provided between the two columns;

[0004] The solution provided in the above invention patent application is to clamp the outer wall of the steel pipe by two columns so that the distance between the two columns is the diameter of the steel pipe, and then read the scale from the scale line, avoiding errors and facilitating the accuracy of the detection results. When measuring the diameter of the steel pipe, the above patent will waste a lot of time because the steel pipe is long and has a large span, and it is inconvenient to detect the diameter deep inside the steel pipe. In addition, it is impossible to detect unqualified parts such as concave and convex parts on the inner and outer surfaces of the steel pipe. There are limitations in the detection of the diameter of the steel pipe, which affects the subsequent repair of the steel pipe. Summary of the invention

[0005] The object of the present invention is to provide a steel pipe diameter detection device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a steel pipe diameter detection device, comprising a fixed platform and a steel pipe outer diameter detection mechanism for detecting the outer diameter of the steel pipe, and a steel pipe inner diameter detection mechanism for detecting the inner diameter of the steel pipe, the steel pipe outer diameter detection mechanism comprising two groups of steel pipe guide components arranged above the fixed platform, two groups of outer diameter detection components for detecting the outer diameter of the steel pipe are arranged between the two groups of steel pipe guide components, the two groups of outer diameter detection components are distributed up and down, and one side of the two groups of outer diameter detection components is respectively provided with a length measuring component for detecting the length of the steel pipe;

[0007] The outer diameter detection component includes a bent plate arranged between the steel pipe guide components, the lower end of the bent plate below is fixedly connected to two vertical rods, the vertical rods are fixedly connected to the fixed platform, a mounting groove is opened in the bent plate, a plurality of fitting blocks are slidably arranged in the mounting groove, sliding plates are fixedly connected on both sides of the fitting block, fixed frames are arranged on both sides of the fitting block, one end of the fixed frame is fixedly connected to the inside of the mounting groove, the sliding plate is slidably matched with the inner wall of the fixed frame, a small spring is fixedly connected to the lower end of the sliding plate, the other end of the small spring is fixedly connected to the inside of the mounting groove, a mobile sensor is fixedly connected to the lower end of the fitting block, and the mobile sensor is located between the fitting block and the mounting groove.

[0008] Preferably, the steel pipe guiding assembly comprises vertical plates respectively fixedly connected to both sides of the upper end of the fixed platform, the upper end of the vertical plate is fixedly connected to a C-shaped block, a rotating disk is rotatably connected inside the C-shaped block, a driving motor is fixedly arranged below the C-shaped block, the output end of the driving motor passes through the C-shaped block and is fixedly connected to the rotating disk, the upper end of the C-shaped block is fixedly connected to a supporting bent rod, and the supporting bent rod is fixedly connected to the upper bent plate.

[0009] Preferably, the length measuring assembly comprises connecting protrusions fixedly connected to one side of the two bent plates respectively, a length measuring ball is rotatably connected in the connecting protrusion, and a monitoring element is arranged in the connecting protrusion.

[0010] Preferably, the steel pipe inner diameter detection mechanism includes a fixed component arranged in the steel pipe, a plurality of groups of inner wall fitting components that fit the inner wall of the steel pipe are arranged on the outside of the fixed component, and movable detection components are arranged on both sides of the inner wall fitting components.

[0011] Preferably, the fixing assembly includes a fixing plate movably arranged in a steel pipe, the fixing plate being provided with a plurality of vertical sliding grooves, limit rods being fixedly connected to inner walls of the vertical sliding grooves on both sides, a plurality of rotating grooves being provided near the edges on both sides of the fixing plate, a rotating rod being rotatably connected in the rotating groove, a torsion spring being arranged at the connection between the rotating rod and the rotating groove, a rotating wheel being rotatably connected to the other end of the rotating rod, a motor being fixedly connected to one side of the rotating rod, and the output end of the motor passes through the rotating rod and is fixedly connected to the rotating wheel.

[0012] Preferably, the inner wall fitting component includes a sliding vertical rod slidably arranged in a sliding vertical groove, a sliding groove corresponding to the limiting rod is opened on the outer side of the sliding vertical rod, fitting plates are fixedly connected to both sides of the upper end of the sliding vertical rod, a rotating ball is rotatably connected to one end of the sliding vertical rod, a tooth groove is opened on one side of the sliding vertical rod, and a large spring is arranged between the sliding vertical rod and the sliding vertical groove.

[0013] Preferably, one end of the large spring is fixedly arranged on the lower end of the sliding vertical rod, and the other end of the large spring is fixedly arranged on the inner wall of the sliding vertical groove.

[0014] Preferably, the mobile detection component comprises a short rod fixedly connected to the outside of the fixed plate, one end of the short rod is fixedly connected to a connecting block, one side of the connecting block is rotatably provided with a small gear, and the detection component is arranged inside the connecting block.

[0015] Preferably, a control panel is fixedly mounted above one side of the fixed platform, and two groups of support components are arranged above the fixed platform, and the two groups of support components are respectively arranged on both sides of the steel pipe outer diameter detection mechanism.

[0016] Preferably, the support assembly comprises two support rods fixedly connected to the upper end of the fixed platform, the upper ends of the two support rods are commonly fixedly connected to a support ring, and a plurality of guide balls are rotatably connected inside the support ring.

[0017] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0018] (1) An outer diameter detection component is provided on the fixed platform, and a steel pipe guide component for driving the steel pipe to move is also provided on one side of the outer diameter detection component. When the rotating disk drives the steel pipe to move, the steel pipe squeezes the fitting block. When a depression or bulge appears on the surface of the steel pipe, the small spring pushes the sliding plate or the outer wall of the steel pipe to squeeze the fitting block into the installation groove, so that the fitting block fits the outer wall of the steel pipe. The moving sensor detects the moving distance of the fitting block and uploads the information to the control panel for display. The fixed component is placed inside the steel pipe, and the motor drives the inner diameter detection mechanism of the steel pipe through the rotating wheel. When the inner diameter detection mechanism of the steel pipe moves, if there is a depression or bulge on the inner wall of the steel pipe, the large spring pushes the sliding vertical rod to move toward the inner wall of the steel pipe, or the inner wall of the steel pipe squeezes the fitting plate to move the sliding vertical rod into the sliding vertical groove. When the sliding vertical rod moves, it drives the small gear to rotate. The detection component in the connecting block determines the moving distance of the sliding vertical rod by monitoring the rotation amplitude of the small gear, and obtains the data information of the depression or bulge inside the steel pipe, and uploads the information to the control panel for display. The detection is convenient and fast, and will not affect the subsequent steel pipe repair work.

[0019] (2) When the length measuring component drives the steel pipe to move through the rotating disk, the steel pipe is squeezed by the connecting protrusion to drive the length measuring ball to rotate. The length of the steel pipe is measured by monitoring the number of rotations of the length measuring ball. Finally, the length data of the steel pipe is transmitted to the control panel for display, and the length information is combined with the data information detected by the inner wall fitting component and the mobile sensor. The control panel shows the specific position of the steel pipe where the diameter error occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the steel pipe outer diameter detection mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the steel pipe guide assembly of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the outer diameter detection component of the present invention;

[0024] Figure 5 It is a schematic diagram of the partial structural disassembly of the outer diameter detection component of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the steel pipe inner diameter detection mechanism of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the fixing assembly of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the inner wall fitting component and the movement detection component of the present invention;

[0028] Fig. 9 This is a schematic diagram of the structure of the inner wall laminating assembly of the present invention;

[0029] Fig.10 This is a schematic diagram of the structure of the mobile detection component of the present invention;

[0030] Fig.11 It is a schematic diagram of the support assembly structure of the present invention.

[0031] In the figure: 1, fixed table; 11, control board; 12, support assembly; 121, support rod; 122, support ring; 123, guide ball; 2, steel pipe outer diameter detection mechanism; 21, steel pipe guide assembly; 211, vertical plate; 212, C-shaped block; 213, rotating disk; 214, support bending rod; 22, outer diameter detection assembly; 221, bending plate; 222, vertical rod; 223, mounting groove; 224, fitting block; 225, sliding plate; 226, fixed frame; 227, small spring; 228, mobile sensor; 23, length measurement assembly; 231. Connecting protrusion; 232. Length measuring ball; 3. Steel pipe inner diameter detection mechanism; 31. Fixed assembly; 311. Fixed plate; 312. Sliding vertical groove; 313. Limit rod; 314. Rotating groove; 315. Rotating rod; 316. Rotating wheel; 317. Motor; 32. Inner wall fitting assembly; 321. Sliding vertical rod; 322. Sliding groove; 323. Fitting plate; 324. Rotating ball; 325. Tooth groove; 326. Large spring; 33. Mobile detection assembly; 331. Short rod; 332. Connecting block; 333. Pinion. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] like Figures 1 to 11 As shown, a steel pipe diameter detection device provided by the present invention comprises a fixed platform 1 and a steel pipe outer diameter detection mechanism 2 for detecting the outer diameter of the steel pipe, and a steel pipe inner diameter detection mechanism 3 for detecting the inner diameter of the steel pipe, the steel pipe outer diameter detection mechanism 2 comprises two groups of steel pipe guide components 21 arranged above the fixed platform 1, two groups of outer diameter detection components 22 for detecting the outer diameter of the steel pipe are arranged between the two groups of steel pipe guide components 21, the two groups of outer diameter detection components 22 are distributed up and down, and one side of the two groups of outer diameter detection components 22 is respectively provided with a length measuring component 23 for detecting the length of the steel pipe;

[0035] The outer diameter detection component 22 includes a bent plate 221 arranged between the steel pipe guide components 21, and the lower end of the lower bent plate 221 is fixedly connected to two vertical rods 222, and the vertical rods 222 are fixedly connected to the fixed platform 1. A mounting groove 223 is opened in the bent plate 221, and a plurality of fitting blocks 224 are slidably arranged in the mounting groove 223. Sliding plates 225 are fixedly connected on both sides of the fitting block 224, and fixed frames 226 are arranged on both sides of the fitting block 224. One end of the fixed frame 226 is fixedly connected to the inside of the mounting groove 223, and the sliding plate 225 slides with the inner wall of the fixed frame 226. The other end of the small spring 227 is fixedly connected to the inside of the mounting groove 223. A mobile sensor 228 is fixedly connected to the lower end of the fitting block 224, and the mobile sensor 228 is located between the fitting block 224 and the mounting groove 223.

[0036] The steel pipe guiding assembly 21 includes vertical plates 211 respectively fixedly connected to both sides of the upper end of the fixed platform 1, a C-shaped block 212 is fixedly connected to the upper end of the vertical plate 211, a rotating disk 213 is rotatably connected inside the C-shaped block 212, a driving motor is fixedly arranged below the C-shaped block 212, the output end of the driving motor passes through the C-shaped block 212 and is fixedly connected to the rotating disk 213, a supporting bent rod 214 is fixedly connected to the upper end of the C-shaped block 212, and the supporting bent rod 214 is fixedly connected to the upper bent plate 221.

[0037] The length measuring assembly 23 includes a connecting protrusion 231 fixedly connected to one side of the two bent plates 221, a length measuring ball 232 is rotatably connected inside the connecting protrusion 231, and a monitoring element is provided inside the connecting protrusion 231 for detecting the number of rotations of the connecting protrusion 231. The length of the steel pipe is determined by the number of rotations of the connecting protrusion 231.

[0038] The steel pipe inner diameter detection mechanism 3 includes a fixed component 31 arranged in the steel pipe, and multiple groups of inner wall fitting components 32 that are fitted to the inner wall of the steel pipe are arranged outside the fixed component 31. Moving detection components 33 for detecting the movement of the inner wall fitting components 32 are arranged on both sides of the inner wall fitting components 32.

[0039] The fixing assembly 31 includes a fixing plate 311 movably arranged in the steel pipe, and a plurality of sliding vertical grooves 312 for installing the inner wall fitting assembly 32 are provided on the fixing plate 311, and limiting rods 313 are fixedly connected to the inner walls of the sliding vertical grooves 312 on both sides, and a plurality of rotating grooves 314 are provided near the edges on both sides of the fixing plate 311, and a rotating rod 315 is rotatably connected in the rotating groove 314, and a torsion spring is provided at the connection between the rotating rod 315 and the rotating groove 314, and a rotating wheel 316 is rotatably connected to the other end of the rotating rod 315, and a motor 317 for driving the rotating wheel 316 to rotate is fixedly connected to one side of the rotating rod 315, and the output end of the motor 317 passes through the rotating rod 315 and is fixedly connected to the rotating wheel 316, and the motor 317 drives the steel pipe inner diameter detection mechanism 3 to move in the steel pipe through the rotating wheel 316, and is always on the same horizontal line with the steel pipe outer diameter detection mechanism 2.

[0040] The inner wall fitting component 32 includes a sliding vertical rod 321 slidably set in the sliding vertical groove 312, a sliding groove 322 corresponding to the limit rod 313 is opened on the outer side of the sliding vertical rod 321, and fitting plates 323 corresponding to the inner wall of the steel pipe are fixedly connected to both sides of the upper end of the sliding vertical rod 321, a rotating ball 324 is rotatably connected to one end of the sliding vertical rod 321, a tooth groove 325 is opened on the side of the sliding vertical rod 321 facing the moving detection component 33, and a large spring 326 is arranged between the sliding vertical rod 321 and the sliding vertical groove 312.

[0041] One end of the large spring 326 is fixedly arranged on the lower end of the sliding vertical rod 321 , and the other end of the large spring 326 is fixedly arranged on the inner wall of the sliding vertical groove 312 .

[0042] The moving detection component 33 includes a short rod 331 fixedly connected to the outside of the fixed plate 311, one end of the short rod 331 is fixedly connected to a connecting block 332, one side of the connecting block 332 is provided with a small gear 333 meshing with the tooth groove 325, and a detection component for detecting the rotation amplitude of the small gear 333 is provided in the connecting block 332. The detection component in the small gear 333 determines the moving distance of the sliding vertical rod 321 by detecting the rotation amplitude of the small gear 333.

[0043] A control panel 11 is fixedly arranged above one side of the fixed platform 1 . Two groups of support components 12 for supporting steel pipes are arranged above the fixed platform 1 . The two groups of support components 12 are respectively arranged on both sides of the steel pipe outer diameter detection mechanism 2 .

[0044] The support assembly 12 includes two support rods 121 fixedly connected to the upper end of the fixed platform 1, and the upper ends of the two support rods 121 are commonly fixedly connected to a support ring 122. A plurality of guide balls 123 are rotatably connected inside the support ring 122. When the steel pipe is moved, it is placed on the support ring 122. The number of support assemblies 12 is set according to the length of the steel pipe. The guide balls 123 ensure that the steel pipe moves smoothly on the support ring 122 to prevent the steel pipe from being worn when moving.

[0045] The working principle and use process of the present invention are as follows: when testing a steel pipe, one end of the steel pipe is inserted between the two bent plates 221 so that the outer wall of the steel pipe squeezes the fitting block 224. At this time, the steel pipe inner diameter detection mechanism 3 is placed inside the steel pipe so that the multiple rotating wheels 316 are in contact with the inner wall of the steel pipe. The driving motor drives the rotating disk 213 to rotate, and the rotating disk 213 drives the steel pipe to move toward the connecting protrusion 231. When the steel pipe passes through the connecting protrusion 231, the squeezing force drives the length measuring ball 232 to rotate. The monitoring element in the connecting protrusion 231 calculates the length of the steel pipe by monitoring and calculating how many times the length measuring ball 232 rotates. During the movement of the steel pipe, if the surface of the steel pipe is bulged, the bulged part of the steel pipe will squeeze the fitting block 224. When the fitting block 224 moves into the installation groove 223, the small spring 227 is pressed by the sliding plate 225. When the fitting block 224 moves into the installation groove 223, the moving sensor 228 is pressed. The moving sensor 228 detects the moving distance of the fitting block 224 into the installation groove 223 and transmits the data information to the control board 11 for display. When there is a depression on the surface of the steel pipe, the small spring 227 pushes the fitting block 224 to slide outside the installation groove 223 through the sliding plate 225, and always fits with the outer wall of the steel pipe. At this time, the moving sensor 228 detects the moving distance of the fitting block 224 outside the installation groove 223, and uploads the data to the control board 11 for display, and combines this information with the steel pipe length information calculated by the length measuring ball 232, and displays it on the steel pipe. To detect where a depression or protrusion appears on the outer wall of the steel pipe, the motor 317 drives the rotating wheel 316 to rotate, and the rotating wheel 316 pushes the fixed plate 311 to move inside the steel pipe through the rotating rod 315. When the fixed plate 311 moves inside the steel pipe, the fixed plate 311 drives the fitting plate 323 to move inside the steel pipe. The fitting plate 323 is always fitted with the inner wall of the steel pipe under the push of the large spring 326 and the sliding vertical rod 321. When a depression appears inside the steel pipe, the large spring 326 pushes the sliding vertical rod 321 to expose a part from the sliding vertical groove 312, and the sliding vertical rod 321 drives the fitting plate 323 to fit inside the steel pipe. When the sliding vertical rod 321 moves, the small gear 333 is driven to rotate through the tooth groove 325, and the internal detection of the connecting block 332 is completed. The component detects the rotation amplitude of the pinion 333, determines the distance the sliding vertical rod 321 moves out, and uploads it to the control board 11 for display. When a bulge appears inside, the bulge squeezes the fitting plate 323, and the fitting plate 323 squeezes the sliding vertical rod 321 to slide into the sliding vertical groove 312. At this time, the sliding vertical rod 321 drives the pinion 333 to rotate in the opposite direction through the tooth groove 325. The internal detection component of the connecting block 332 detects the rotation amplitude of the pinion 333, determines the distance the sliding vertical rod 321 moves into the sliding vertical groove 312, and uploads it to the control board 11 for display. The control board 11 compares the detection information of the internal detection component of the connecting block 332 with the steel pipe length information calculated by the length measuring ball 232 to determine the position of the unqualified inner wall of the steel pipe, thereby improving the detection efficiency.

[0046] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A steel pipe diameter detection device, comprising a fixed platform (1) and a steel pipe outer diameter detection mechanism (2) for detecting the outer diameter of the steel pipe, and a steel pipe inner diameter detection mechanism (3) for detecting the inner diameter of the steel pipe, characterized in that: The steel pipe outer diameter detection mechanism (2) comprises two groups of steel pipe guide assemblies (21) arranged above the fixed platform (1), two groups of outer diameter detection assemblies (22) for detecting the outer diameter of the steel pipe are arranged between the two groups of steel pipe guide assemblies (21), the two groups of outer diameter detection assemblies (22) are distributed up and down, and length measurement assemblies (23) for detecting the length of the steel pipe are respectively arranged on one side of the two groups of outer diameter detection assemblies (22); The outer diameter detection component (22) comprises a bent plate (221) arranged between the steel pipe guide components (21), the lower end of the bent plate (221) is fixedly connected to two vertical rods (222), the vertical rods (222) are fixedly connected to the fixed platform (1), the bent plate (221) is provided with a mounting groove (223), a plurality of fitting blocks (224) are slidably arranged in the mounting groove (223), sliding plates (225) are fixedly connected to the two sides of the fitting block (224), and fixed plates (225) are arranged on the two sides of the fitting block (224). A fixed frame (226), one end of the fixed frame (226) is fixedly connected to the inside of the mounting groove (223), the sliding plate (225) is slidably matched with the inner wall of the fixed frame (226), the lower end of the sliding plate (225) is fixedly connected to a small spring (227), the other end of the small spring (227) is fixedly connected to the inside of the mounting groove (223), the lower end of the fitting block (224) is fixedly connected to a movement sensor (228), and the movement sensor (228) is located between the fitting block (224) and the mounting groove (223).

2. A steel pipe diameter detection device according to claim 1, characterized in that: The steel pipe guide assembly (21) comprises vertical plates (211) respectively fixedly connected to both sides of the upper end of the fixed platform (1); the upper end of the vertical plate (211) is fixedly connected to a C-shaped block (212); a rotating disk (213) is rotatably connected inside the C-shaped block (212); a driving motor is fixedly arranged below the C-shaped block (212); an output end of the driving motor passes through the C-shaped block (212) and is fixedly connected to the rotating disk (213); the upper end of the C-shaped block (212) is fixedly connected to a supporting bent rod (214); and the supporting bent rod (214) is fixedly connected to the upper bent plate (221).

3. A steel pipe diameter detection device according to claim 2, characterized in that: The length measuring assembly (23) comprises connecting protrusions (231) respectively fixedly connected to one side of two bent plates (221), a length measuring ball (232) being rotatably connected in the connecting protrusion (231), and a monitoring element being arranged in the connecting protrusion (231).

4. A steel pipe diameter detection device according to claim 1, characterized in that: The steel pipe inner diameter detection mechanism (3) comprises a fixed component (31) arranged inside the steel pipe, a plurality of groups of inner wall fitting components (32) fitted with the inner wall of the steel pipe are arranged outside the fixed component (31), and movable detection components (33) are arranged on both sides of the inner wall fitting components (32).

5. A steel pipe diameter detection device according to claim 4, characterized in that: The fixing assembly (31) comprises a fixing plate (311) movably arranged in a steel pipe, the fixing plate (311) being provided with a plurality of vertical sliding grooves (312), the inner walls of the vertical sliding grooves (312) being fixedly connected to limiting rods (313), the fixing plate (311) being provided with a plurality of rotating grooves (314) near the edges on both sides, the rotating grooves (314) being rotatably connected to rotating rods (315), the connection between the rotating rod (315) and the rotating grooves (314) being provided with torsion springs, the other end of the rotating rod (315) being rotatably connected to a rotating wheel (316), one side of the rotating rod (315) being fixedly connected to a motor (317), the output end of the motor (317) passing through the rotating rod (315) and being fixedly connected to the rotating wheel (316).

6. A steel pipe diameter detection device according to claim 5, characterized in that: The inner wall fitting component (32) comprises a sliding vertical rod (321) slidably arranged in a sliding vertical groove (312); a sliding groove (322) corresponding to the limit rod (313) is provided on the outer side of the sliding vertical rod (321); fitting plates (323) are fixedly connected to both sides of the upper end of the sliding vertical rod (321); a rotating ball (324) is rotatably connected to one end of the sliding vertical rod (321); a tooth groove (325) is provided on one side of the sliding vertical rod (321); and a large spring (326) is provided between the sliding vertical rod (321) and the sliding vertical groove (312).

7. A steel pipe diameter detection device according to claim 6, characterized in that: One end of the large spring (326) is fixedly arranged on the lower end of the sliding vertical rod (321), and the other end of the large spring (326) is fixedly arranged on the inner wall of the sliding vertical groove (312).

8. A steel pipe diameter detection device according to claim 7, characterized in that: The mobile detection component (33) comprises a short rod (331) fixedly connected to the outside of the fixed plate (311); one end of the short rod (331) is fixedly connected to a connecting block (332); one side of the connecting block (332) is rotatably provided with a small gear (333); and a detection component is provided inside the connecting block (332).

9. A steel pipe diameter detection device according to claim 1, characterized in that: A control panel (11) is fixedly arranged above one side of the fixed platform (1), and two groups of support components (12) are arranged above the fixed platform (1). The two groups of support components (12) are respectively arranged on both sides of the steel pipe outer diameter detection mechanism (2).

10. A steel pipe diameter detection device according to claim 9, characterized in that: The support assembly (12) comprises two support rods (121) fixedly connected to the upper end of the fixed platform (1); the upper ends of the two support rods (121) are commonly fixedly connected to a support ring (122); and a plurality of guide balls (123) are rotatably connected inside the support ring (122).

Images