A kind of magnetic flux leakage testing machine for steel pipe

Abstract

The utility model relates to the technical field of magnetic flux leakage testing machine, concretely relates to a steel pipe magnetic flux leakage testing machine, including the transport platform, the top of transport platform is provided with the attitude adjusting mechanism, the attitude adjusting mechanism includes the servo motor fixed connection in the front end of transport platform, the surface of transport platform is opened and has the delivery groove, the inside rotation of delivery groove is connected with the thread rod, the output of servo motor is connected with the thread rod fixedly, the outside wall of thread rod is connected with two groups of connecting rods in screw, and the inside of delivery groove is connected with the connecting rod slidingly, and the top of connecting rod is fixedly connected with the steel pipe setting platform. The utility model discloses through the cooperation of transport platform and attitude adjusting mechanism, realizes the linear positioning of steel pipe on the transport platform through the accurate drive thread rod mechanism of servo motor, and the detection station under the magnetic flux leakage testing instrument is reached fast and accurately with steel pipe, so that the fixed magnetic flux leakage testing instrument can carry out the comprehensive scanning of the whole circumference surface of steel pipe without dead zone, and the defect detection of the section is completed at a time.

Description

Technical Field

[0001] This utility model relates to the field of magnetic flux leakage flaw detector technology, specifically to a magnetic flux leakage flaw detector for steel pipes. Background Technology

[0002] Oil pipes are special pipelines used to transport liquids or gases such as oil and natural gas. They are widely used in oil exploration, oil extraction, and transportation. Magnetic flux leakage (MFL) testing is a common non-destructive testing device suitable for defect detection and quality assessment of metal components. It applies an alternating magnetic field to the surface of the object being tested based on the principle of electromagnetic induction, and determines whether there are defects such as cracks, deformation, or fatigue on the tested component by measuring the changes in the magnetic field.

[0003] In practical applications, it was found that existing magnetic flux leakage testing devices can only perform transverse or circumferential testing on oil pipes one at a time, and cannot perform transverse and circumferential testing on oil pipes simultaneously.

[0004] Therefore, it is necessary to invent a magnetic flux leakage flaw detector for steel pipes to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic flux leakage flaw detector for steel pipes, which improves efficiency through the cooperation of a transport platform and an attitude adjustment mechanism, thereby solving the problem that existing technologies cannot simultaneously perform lateral and circumferential flaw detection on oil pipes.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a magnetic flux leakage flaw detector for steel pipes, comprising a transport platform, a posture adjustment mechanism at the top of the transport platform, a servo motor fixedly connected to the front end of the transport platform, a transport groove on the surface of the transport platform, a threaded rod rotatably connected inside the transport groove, the output end of the servo motor fixedly connected to the threaded rod, two sets of connecting rods threadedly connected to the outer wall of the threaded rod, the connecting rods slidably connected inside the transport groove, a steel pipe mounting platform fixedly connected to the top of the connecting rods, a mounting box fixedly connected to the bottom of the steel pipe mounting platform, several sets of transmission wheels on the surface of the steel pipe mounting platform, several sets of driven wheels on the surface of the steel pipe mounting platform, both the driven wheels and transmission wheels being made of rubber and engraved with friction textures, the transmission wheels and driven wheels being symmetrically distributed along the center of the steel pipe mounting platform, and the axial and circumferential positions being adjusted by the posture adjustment mechanism.

[0007] Preferably, a fixed platform is fixedly connected to the right side of the transport platform, and an inverted L-shaped bracket is fixedly connected to the top of the fixed platform, using the inverted L-shaped bracket to install subsequent parts.

[0008] Preferably, a magnetic flux leakage flaw detector is fixedly connected to the bottom end of the inverted L-shaped bracket, and an analyzer is installed on the side of the fixed platform away from the transport platform. The detection is carried out by the cooperation of the analyzer and the magnetic flux leakage flaw detector.

[0009] Preferably, the steel pipe mounting platform is internally fixedly connected to a first support rod, and a rotating shaft is fixedly connected to the center of the first support rod, with a driven wheel fixedly connected to the outer wall of the rotating shaft, and the connection is made using the first support rod.

[0010] Preferably, the steel pipe mounting platform is internally fixedly connected to a second support rod, and a drive shaft is rotatably connected to the center of the second support rod. A drive wheel is fixedly connected to the outer wall of the drive shaft, and a first sprocket is fixedly connected to the outer wall of the drive shaft. The drive shaft drives the coaxial drive wheel to move.

[0011] Preferably, a chain is fitted to the outer wall of the first sprocket, and a second sprocket is fitted inside the end of the chain away from the first sprocket, so that the transmission is carried out through the chain.

[0012] Preferably, a fixing plate is fixedly connected inside the mounting box, and a rotating motor is fixedly connected to the top of the fixing plate. The output end of the rotating motor is fixedly connected to the second sprocket, and the rotating motor is started to realize the operation.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows: By coordinating the transport platform and the attitude adjustment mechanism, and through a threaded rod mechanism precisely driven by a servo motor, the steel pipe is linearly positioned on the transport platform, quickly and accurately delivering it to the inspection station below the magnetic flux leakage flaw detector. Subsequently, through another independent rotary drive system installed on the same moving platform—a chain drive consisting of a rotating motor, a second sprocket, a chain, and a first sprocket—the drive shaft and its drive wheel covered with high-friction rubber rotate. Utilizing friction, the steel pipe rotates circumferentially in place with the support of the driven wheel, allowing the fixed magnetic flux leakage flaw detector to perform a comprehensive, dead-zone-free scan of the entire circumference of the steel pipe, completing the defect detection of the cross-section in one go, greatly improving the continuity and efficiency of the inspection. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model; Figure 2This is a schematic diagram of the overall second-view structure of this utility model; Figure 3 This is a schematic diagram of the steel pipe mounting platform structure of this utility model; Figure 4 This is a schematic diagram of the chain structure of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Transport platform; 2. Attitude adjustment mechanism; 201. Servo motor; 202. Transport trough; 203. Connecting rod; 204. Steel pipe mounting platform; 205. Mounting box; 206. Threaded rod; 207. Transmission wheel; 208. Driven wheel; 3. Inverted L-shaped bracket; 4. Fixed platform; 5. Analyzer; 6. Magnetic flux leakage flaw detector; 7. Chain; 8. Fixed plate; 9. First support rod; 10. First sprocket; 11. Transmission shaft; 12. Second sprocket; 13. Rotating motor; 14. Second support rod. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-4 The illustrated magnetic flux leakage flaw detector for steel pipes includes a transport platform 1. A posture adjustment mechanism 2 is mounted on the top of the transport platform 1. The posture adjustment mechanism 2 includes a servo motor 201 fixedly connected to the front end of the transport platform 1. A transport groove 202 is formed on the surface of the transport platform 1. A threaded rod 206 is rotatably connected inside the transport groove 202. The output end of the servo motor 201 is fixedly connected to the threaded rod 206. Two sets of connecting rods 203 are threadedly connected to the outer wall of the threaded rod 206. The connecting rods 203 are slidably connected inside the transport groove 202. A steel pipe mounting platform 204 is fixedly connected to the top of the connecting rods 203. A mounting box 205 is fixedly connected to the bottom of the steel pipe mounting platform 204. The surface of the transport platform 1 is provided with several sets of transmission wheels 207, and the surface of the steel pipe mounting platform 204 is provided with several sets of driven wheels 208. Both the driven wheels 208 and the transmission wheels 207 are made of rubber and engraved with friction texture. The transmission wheels 207 and the driven wheels 208 are symmetrically distributed along the center of the steel pipe mounting platform 204. The axial and circumferential positions are adjusted by the attitude adjustment mechanism 2. The right side of the transport platform 1 is fixedly connected to a fixed platform 4. The top of the fixed platform 4 is fixedly connected to an inverted L-shaped bracket 3. The inverted L-shaped bracket 3 is used to install subsequent parts. The bottom end of the inverted L-shaped bracket 3 is fixedly connected to a magnetic flux leakage flaw detector 6. An analyzer 5 is installed on the side of the fixed platform 4 away from the transport platform 1. The analyzer 5 and the magnetic flux leakage flaw detector 6 work together to perform detection.

[0019] Refer to the instruction manual appendix Figure 1-4The steel pipe mounting platform 204 is internally fixedly connected to a first support rod 9, and a rotating shaft is fixedly connected to the center of the first support rod 9. A driven wheel 208 is fixedly connected to the outer wall of the rotating shaft. The first support rod 9 is used for connection. The steel pipe mounting platform 204 is internally fixedly connected to a second support rod 14, and a drive shaft 11 is rotatably connected to the center of the second support rod 14. A drive wheel 207 is fixedly connected to the outer wall of the drive shaft 11. A first sprocket 10 is fixedly connected to the outer wall of the drive shaft 11. The drive shaft 11 drives the coaxial drive wheel 207 to move. A chain 7 is fitted to the outer wall of the first sprocket 10. A second sprocket 12 is fitted inside the end of the chain 7 away from the first sprocket 10. The chain 7 is used for transmission. The mounting box 205 is internally fixedly connected to a fixing plate 8. A rotating motor 13 is fixedly connected to the top of the fixing plate 8. The output end of the rotating motor 13 is connected to the second sprocket. 12. Fixed connection, start the rotating motor 13 to start work. Through the cooperation of the transport table 1 and the attitude adjustment mechanism 2, the threaded rod 206 mechanism driven by the servo motor 201 realizes the linear positioning of the steel pipe on the transport table 1, and quickly and accurately delivers the steel pipe to the detection station below the magnetic flux leakage flaw detector 6. Subsequently, through another set of independent rotary drive systems installed on the same moving platform - namely the chain drive composed of the rotating motor 13 through the second sprocket 12, chain 7 and the first sprocket 10, the drive shaft 11 and the drive wheel 207 covered with high friction coefficient rubber are driven to rotate. The friction force drives the steel pipe to rotate in place circumferentially under the support of the driven wheel 208, so that the fixed magnetic flux leakage flaw detector 6 can perform a comprehensive scan of the entire circumference surface of the steel pipe without dead zones, and complete the defect detection of the section in one go, which greatly improves the continuity and efficiency of the detection.

[0020] The working principle of this practical application is as follows: Refer to the instruction manual appendix Figure 1-4During operation, the operator places the steel pipe to be tested on the steel pipe mounting platform 204, which is supported by the symmetrically distributed transmission wheels 207 and driven wheels 208. After startup, the servo motor 201 starts working first, driving the threaded rod 206 to rotate. Due to the sliding fit constraint between the connecting rod 203 and the conveying groove 202, the rotational motion is converted into a smooth linear motion of the connecting rod 203 and the entire steel pipe mounting platform 204 above it, until the steel pipe is accurately conveyed to the detection area of ​​the magnetic flux leakage detector 6 directly below the inverted L-shaped bracket 3. After the axial feeding stops, the rotary motor 13 immediately starts, and its output power drives the second sprocket 12 to rotate, transmitting the power to the first sprocket 10 through the chain 7. This drives the drive shaft 11 and all drive wheels 207 to rotate synchronously. The rubber drive wheels 207 with friction grooves drive the steel pipe to rotate at a constant speed around its own axis through friction with the surface of the steel pipe. During this process, the fixedly installed magnetic flux leakage flaw detector 6 continuously collects data on the surface of the rotating steel pipe and transmits the signal to the analyzer 5 for processing and analysis, and finally determines whether there is a defect in the cross section. Throughout the process, the mounting box 205 provides a stable mounting base for the rotating motor 13 and the transmission system, while the first support rod 9 and the second support rod 14 ensure the support rigidity of the driven wheel 208 and the drive shaft 11, ensuring the smoothness and reliability of the rotational motion.

[0021] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A magnetic flux leakage flaw detector for steel pipes, comprising a transport platform (1), characterized in that: The top of the transport platform (1) is provided with an attitude adjustment mechanism (2). The attitude adjustment mechanism (2) includes a servo motor (201) fixedly connected to the front end of the transport platform (1). A transport groove (202) is opened on the surface of the transport platform (1). A threaded rod (206) is rotatably connected inside the transport groove (202). The output end of the servo motor (201) is fixedly connected to the threaded rod (206). Two sets of connecting rods (203) are threadedly connected to the outer wall of the threaded rod (206). The connecting rods (203) are slidably connected to the transport groove (202). Inside 2), a steel pipe mounting platform (204) is fixedly connected to the top of the connecting rod (203), and a mounting box (205) is fixedly connected to the bottom of the steel pipe mounting platform (204). Several sets of transmission wheels (207) are provided on the surface of the steel pipe mounting platform (204), and several sets of driven wheels (208) are provided on the surface of the steel pipe mounting platform (204). Both the driven wheels (208) and the transmission wheels (207) are made of rubber and engraved with friction texture. The transmission wheels (207) and the driven wheels (208) are symmetrically distributed along the center of the steel pipe mounting platform (204).

2. The magnetic flux leakage flaw detector for steel pipes according to claim 1, characterized in that: A fixed platform (4) is fixedly connected to the right side of the transport platform (1), and an inverted L-shaped bracket (3) is fixedly connected to the top of the fixed platform (4).

3. A magnetic flux leakage flaw detector for steel pipes according to claim 2, characterized in that: The bottom end of the inverted L-shaped bracket (3) is fixedly connected to a magnetic flux leakage detector (6), and an analyzer (5) is installed on the side of the fixed platform (4) away from the transport platform (1).

4. A magnetic flux leakage flaw detector for steel pipes according to claim 1, characterized in that: The steel pipe mounting platform (204) is internally fixedly connected to a first support rod (9), and a rotating shaft is fixedly connected at the center of the first support rod (9), with the driven wheel (208) fixedly connected to the outer wall of the rotating shaft.

5. A magnetic flux leakage flaw detector for steel pipes according to claim 1, characterized in that: The steel pipe mounting platform (204) is internally fixedly connected to a second support rod (14), and a transmission shaft (11) is rotatably connected at the center of the second support rod (14). A transmission wheel (207) is fixedly connected to the outer wall of the transmission shaft (11), and a first sprocket (10) is fixedly connected to the outer wall of the transmission shaft (11).

6. A magnetic flux leakage flaw detector for steel pipes according to claim 5, characterized in that: The outer wall of the first sprocket (10) is fitted with a chain (7), and the end of the chain (7) away from the first sprocket (10) is fitted with a second sprocket (12).

7. A magnetic flux leakage flaw detector for steel pipes according to claim 1, characterized in that: The mounting box (205) is fixedly connected to a fixing plate (8), and a rotating motor (13) is fixedly connected to the top of the fixing plate (8). The output end of the rotating motor (13) is fixedly connected to the second sprocket (12).

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