Magnetic flux leakage scanning detector for bottom plate of storage tank

Abstract

The utility model discloses a storage tank bottom plate magnetic flux leakage scanning detector which comprises a scanning detector, the scanning detector is composed of frame plates and a magnetic pole, the magnetic pole is located between the two frame plates, an impurity removing unit is arranged on the outer side of the magnetic pole, the impurity removing unit comprises a vertical cylinder, and the vertical cylinder is located on the outer side of the magnetic pole. According to the magnetic flux leakage scanning detector for the bottom plate of the storage tank, through cooperation of the frame plate, the magnetic pole and the impurity removing unit, the tooth column can perform meshing transmission on the tooth disc, the circular ring, the vertical cylinder and the lantern ring can rotate, and in the process, steel wire bristles on the two sides of the lower portion of the lantern ring can revolve around the vertical cylinder as the center; the surface of the bottom plate of the storage tank is effectively cleaned along with movement of the scanning detector, the probability that welding slag, rust and the like are magnetically adsorbed during detection operation is greatly reduced, the welding slag, rust and the like on the surface of the bottom plate can be cleaned in real time during detection operation, the magnetic pole cleaning frequency is greatly reduced, and efficient detection can be smoothly carried out.

Description

Technical Field

[0001] This utility model relates to the technical field of magnetic flux leakage scanning detectors, specifically a magnetic flux leakage scanning detector for the bottom plate of a storage tank. Background Technology

[0002] The TMS-08M magnetic flux leakage detector for tank bottom plates is a new generation of mechatronic testing instrument developed by researchers based on new magnetic detection technology, electronic technology, and signal processing technology. The use of this detector will improve the working environment of testing personnel, reduce their workload, and increase the speed and accuracy of testing.

[0003] The data acquisition and analysis software for the tank bottom plate magnetic flux leakage detector operates on Windows 98 / 2000 / XP platforms, enabling real-time display of defect data and threshold alarms. The software is designed for rapid detection, and its image reporting function automatically generates detailed graphical reports of detection results. Furthermore, the color of the scanned image can be used to determine the location and severity of corrosion defects. Based on the detection data and scanned images provided by the TMS-08M tank bottom plate magnetic flux leakage detector, corrosion defects in the tank bottom plate can be accurately and scientifically evaluated, allowing for a comprehensive analysis and the development of appropriate maintenance and management plans.

[0004] Currently, before operating a magnetic flux leakage detector for tank bottom plates, all manholes and drain holes of the tank need to be opened, and sufficient ventilation time allowed. The tank needs to be cleaned, but it is not necessary to remove the anti-corrosion coating on the bottom plate. When there is welding slag, rust, or other ferromagnetic debris on the tank bottom plate, these debris will adhere to the magnetic poles during the testing process, affecting the accuracy of the results. Therefore, the magnetic poles need to be cleaned continuously during the testing operation. The device does not have a real-time cleaning function, and cleaning the magnetic poles during this process will affect the overall effectiveness of the testing and hinder efficient testing. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic flux leakage scanning detector for tank bottom plates, which can clean welding slag and rust on the bottom plate surface in real time during the inspection operation, greatly reducing the cleaning frequency of the magnetic poles and facilitating efficient inspection, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a magnetic flux leakage scanning detector for the bottom plate of a storage tank, comprising a scanning detector, the scanning detector being composed of a frame plate and magnetic poles, the magnetic poles being located between two frame plates, and a cleaning unit being provided on the outer side of the magnetic poles, the cleaning unit comprising: a vertical cylinder, the vertical cylinder being located on the outer side of the magnetic poles, a collar being fixedly sleeved on the lower part of the outer wall of the vertical cylinder, vertical plates being provided on both sides of the lower surface of the collar, a first bolt being inserted into the lower surface of the vertical plate, the first bolt penetrating the vertical plate and threadedly connected to the collar, and multiple obliquely arranged steel wire bristles being fixedly attached to the surface of the vertical plate away from the vertical cylinder. A flexible ring is concentrically fixed to the bottom end of the vertical cylinder. A circular ring is provided above the collar. A pair of sliders are fixed to the inner wall of the circular ring. The sliders are slidably limited to the vertical cylinder through a sliding groove. A sleeve plate is rotatably connected to the outer wall of the circular ring. A toothed disc is concentrically fixed to the upper surface of the circular ring. A toothed column is meshed above the toothed disc. A rotating rod is fixed to the inner wall of the toothed column. A housing is rotatably connected to the outer wall of the rotating rod. The housing is fixedly connected to the frame plate. A motor is fixed to the end of the rotating rod away from the toothed column. The contact surface of the motor and the housing is fixedly connected. An annular groove plate is rotatably connected to the top of the outer wall of the vertical cylinder. The annular groove plate is connected to the housing.

[0007] Preferably, the annular groove plate is connected to the housing via a connecting unit, the connecting unit comprising: two vertical rods, the two vertical rods being rotatably connected to both sides of the upper surface of the annular groove plate, a compression spring being fitted on the outer wall of the vertical rod, the two ends of the compression spring being fixedly connected to the contact surfaces of the annular groove plate and the housing respectively, a protruding rod being fixedly connected to both sides of the outer wall of the vertical rod, a pull ring being fixedly connected to the top of the vertical rod, and the vertical rod being able to penetrate the housing through a through hole.

[0008] Preferably, a protective unit is provided at the bottom of the housing. The protective unit includes a rubber ring located at the bottom of the housing. The inner wall of the rubber ring abuts against the outer wall of the vertical cylinder. A stop ring is abutted against the lower surface of the rubber ring. A second bolt is inserted into the lower surface of the stop ring. The second bolt passes through the stop ring and the rubber ring and is threadedly connected to the housing.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This magnetic flux leakage scanning detector for tank bottom plates has the following advantages over traditional technologies:

[0010] Through the coordination of the frame plate, magnetic poles, and cleaning unit, the preparatory work is completed. During the scanning and inspection of the tank bottom plate, the motor is powered to rotate, causing the rotating rod and gear column to rotate. The gear column can mesh with the gear disc, enabling the ring, vertical cylinder, and collar to rotate. During this process, the steel wire brushes on both sides below the collar will revolve around the vertical cylinder as the center. As the scanning and inspection instrument moves, it effectively cleans the surface of the tank bottom plate. The probability of magnetic adsorption of welding slag and rust during the inspection is greatly reduced. It can clean the welding slag and rust on the bottom plate surface in real time during the inspection, greatly reducing the cleaning frequency of the magnetic poles and facilitating the smooth progress of efficient inspection.

[0011] Through the cooperation between the frame plate, magnetic poles, cleaning unit and connecting unit, after the scanning detector is used, the user applies force to pull the pull ring upward so that the protrusion is higher than the upper surface of the housing, and then rotates the ring 90°. After releasing the pull ring, the bottom end of the outer wall of the protrusion will abut against the upper surface of the housing, which can create a distance between the wire brush bristles and the soft ring and the ground. During the non-use movement of the scanning detector, unnecessary wear on the wire brush bristles and the soft ring will not be caused, which will reduce the maintenance frequency.

[0012] Through the cooperation between the frame plate, magnetic poles, cleaning unit and protection unit, the inner wall of the rubber ring is fully pressed against the outer wall of the vertical cylinder. The dust generated by the steel wire brush cleaning the bottom plate surface of the storage tank will not enter the interior of the shell, which can facilitate the long-term stable transmission of various structural components inside the shell. Attached Figure Description

[0013] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Front view partial sectional view;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0018] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0019] Figure 6 for Figure 2 Enlarged view at point D;

[0020] Figure 7 for Figure 2 Top view of the overall structure of the middle shell;

[0021] Figure 8 for Figure 2 Top view of the central cylinder, ring, and gear disc.

[0022] In the diagram: 1. Frame plate, 2. Magnetic pole, 3. Vertical cylinder, 4. Collar ring, 5. Vertical plate, 6. First bolt, 7. Wire brush bristles, 8. Soft ring, 9. Circular ring, 10. Slider, 11. Slide groove, 12. Sleeve plate, 13. Gear disc, 14. Gear column, 15. Rotating rod, 16. Motor, 17. Housing, 18. Ring groove plate, 19. Vertical rod, 20. Compression spring, 21. Protruding rod, 22. Pull ring, 23. Through hole, 24. Rubber ring, 25. Abutment ring, 26. Second bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-8 This utility model provides a technical solution: a magnetic flux leakage scanning detector for the bottom plate of a storage tank, including a scanning detector composed of a frame plate 1 and magnetic poles 2. The magnetic poles 2 are located between two frame plates 1. A cleaning unit is provided on the outside of the magnetic poles 2. The cleaning unit includes: a vertical cylinder 3, located on the outside of the magnetic poles 2. A collar 4 is fixedly sleeved on the lower part of the outer wall of the vertical cylinder 3. Vertical plates 5 are provided on both sides of the lower surface of the collar 4. A first bolt 6 is inserted into the lower surface of the vertical plate 5. The first bolt 6 passes through the vertical plate 5 and is threadedly connected to the collar 4. Multiple obliquely arranged steel wire bristles 7 are fixedly connected to the surface of the vertical plate 5 away from the vertical cylinder 3. A flexible ring 8 is concentrically fixed to the bottom end of the vertical cylinder 3. A circular ring 9 is provided above the ring 4. A pair of sliders 10 are fixed to the inner wall of the circular ring 9. The sliders 10 are slidably limited to the vertical cylinder 3 through the sliding groove 11. A sleeve plate 12 is rotatably connected to the outer wall of the circular ring 9. A toothed disc 13 is concentrically fixed to the upper surface of the circular ring 9. A toothed column 14 is meshed above the toothed disc 13. A rotating rod 15 is fixed to the inner wall of the toothed column 14. A housing 17 is rotatably connected to the outer wall of the rotating rod 15. The housing 17 is fixedly connected to the frame plate 1. A motor 16 is fixed to the end of the rotating rod 15 away from the toothed column 14. The contact surface of the motor 16 and the housing 17 is fixedly connected. An annular groove plate 18 is rotatably connected to the top of the outer wall of the vertical cylinder 3. The annular groove plate 18 is connected to the housing 17.

[0025] In the specific implementation process, it is worth noting that the scanning detector is a magnetic flux leakage detector for tank bottom plates (TMS-08M). Besides the frame plate 1 and magnetic poles 2, the detector also includes necessary components such as a battery, electronic module, encoder, sensor, drive motor, computer, and magnetization structure. The TMS-08M magnetic flux leakage detector for tank bottom plates is developed by researchers based on new magnetic detection technology. The data acquisition and analysis software of the detector operates on Windows 98 / 2000 / XP, enabling real-time display of defect data and threshold alarms. The software is adaptable to the needs of rapid detection, and the image reporting function can automatically generate detailed graphical detection result reports. Furthermore, the color of the scanned image can be used to determine the location and severity of corrosion defects. Based on the detection data and scanned images provided by the TMS-08M magnetic flux leakage detector for tank bottom plates, corrosion defects in the tank bottom plates can be accurately and scientifically evaluated. Since the scanning detector is a known device, its detection principle will not be elaborated further. The top of the magnetic pole 2 is fixedly connected to the contact surface of the shell 17. The flexible ring 8 is made of rubber and has a certain degree of flexibility, preventing impurities from contacting the magnetic pole 2 during cleaning. The inner wall of the ring 9 is fitted with the outer wall of the vertical cylinder 3 with a clearance. The sliding groove 11 can limit the sliding of the slider 10, allowing the slider 10 to only move within the sliding groove 11. The cylinder 3 can slide up and down, but cannot move left, right, forward or backward. When the ring 9 rotates, the slider 10 will apply force to the inner wall of the groove 11, which will make the cylinder 3 rotate together. The ring 9 is rotatably connected to the sleeve plate 12 through the sealed ball bearing. The rotating rod 15 is rotatably connected to the housing 17 through the sealed bearing. The rotating rod 15 is fixedly connected to the output shaft of the motor 16. The housing of the motor 16 is fixedly connected to the housing 17. The power line of the motor 16 is connected to an external power supply device to provide the required power for the operation of the motor 16. The cylinder 3 is rotatably connected to the ring groove plate 18 through the sealed bearing.

[0026] Furthermore, the annular groove plate 18 is connected to the housing 17 via a connecting unit, which includes two vertical rods 19. The two vertical rods 19 are rotatably connected to both sides of the upper surface of the annular groove plate 18. A compression spring 20 is fitted on the outer wall of the vertical rod 19. The two ends of the compression spring 20 are fixedly connected to the contact surfaces of the annular groove plate 18 and the housing 17, respectively. A protruding rod 21 is fixedly connected to both sides of the outer wall of the vertical rod 19. A pull ring 22 is fixedly connected to the top of the vertical rod 19. The vertical rod 19 can penetrate the housing 17 through the through hole 23.

[0027] In the specific implementation process, it is worth noting that the vertical rod 19 is rotatably connected to the annular groove plate 18 through the sealed bearing, and the elastic coefficient of the compression spring 20 is 0.5-2N / CM. When the protruding rod 21 is located at the front and rear ends of the outer wall of the vertical rod 19, it can pass through the through hole 23 to the housing 17. However, when the protruding rod 21 is located at the left and right ends of the outer wall of the vertical rod 19, it cannot pass through the through hole 23 to the housing 17.

[0028] Furthermore, a protective unit is provided at the bottom of the housing 17. The protective unit includes a rubber ring 24, which is located at the bottom of the housing 17. The inner wall of the rubber ring 24 is pressed against the outer wall of the vertical cylinder 3. A retaining ring 25 is pressed against the lower surface of the rubber ring 24. A second bolt 26 is inserted into the lower surface of the retaining ring 25. The second bolt 26 passes through the retaining ring 25 and the rubber ring 24 and is threadedly connected to the housing 17.

[0029] In the specific implementation process, it is worth noting that the rubber ring 24 is made of rubber material and has a certain degree of flexibility. The inner wall of the rubber ring 24 is fully pressed against the outer wall of the vertical cylinder 3. The dust generated by the steel wire brush 7 when cleaning the bottom plate surface of the storage tank will not enter the interior of the shell 17, which can facilitate the long-term stable transmission of various structural components inside the shell 17.

[0030] Working principle:

[0031] When using the magnetic flux leakage scanning detector for the tank bottom plate, preparatory work is required. All manholes and drain holes in the tank must be opened, allowing sufficient ventilation time. The tank must be cleaned, and any welding slag, rust, or other ferromagnetic debris on the tank bottom plate should be removed as much as possible. After the preparatory work is completed, the scanning detector operates. During the inspection of the tank bottom plate, the motor 16 is powered, causing the rotating rod 15 and the gear column 14 to rotate. The gear column 14 engages with the gear disc 13, enabling the ring 9, the vertical cylinder 3, and the collar 4 to rotate. During this process, the steel wire brushes 7 on both sides below the collar 4 revolve around the vertical cylinder 3, effectively cleaning the surface of the tank bottom plate (removing welding slag, rust, or other ferromagnetic debris) as the scanning detector moves. During this process, the inner wall of the rubber ring 24 is fully pressed against the outer wall of the vertical cylinder 3, and the steel wire brushes 7... The fumes generated during cleaning the tank bottom plate surface will not enter the interior of the shell 17, facilitating the long-term stable transmission of various structural components inside the shell 17. The probability of the magnetic attraction 2 adsorbing welding slag and rust during the inspection operation is greatly reduced. It can clean the welding slag and rust on the bottom plate surface in real time during the inspection operation, greatly reducing the cleaning frequency of the magnetic poles and facilitating the smooth progress of efficient inspection. After the scanning detector is used, the user applies upward force to the pull ring 22 so that the protrusion 21 is higher than the upper surface of the shell 17, and then rotates the ring 22 90°. After releasing the pull ring 22, the bottom end of the outer wall of the protrusion 21 will be pressed against the upper surface of the shell 17, which can create a distance between the wire brush bristles 7 and the soft ring 8 and the ground. During the non-use movement of the scanning detector, unnecessary wear on the wire brush bristles 7 and the soft ring 8 will not be caused, which can reduce the maintenance frequency.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tank bottom magnetic flux leakage scanning detector, comprising a scanning detector, the scanning detector is composed of a frame plate (1) and a magnetic pole (2), the magnetic pole (2) is located between two frame plates (1), characterized in that: The outer side of the magnetic pole (2) is provided with a cleaning unit, the cleaning unit comprises: a vertical cylinder (3), the vertical cylinder (3) is located on the outer side of the magnetic pole (2), a sleeve ring (4) is fixedly sleeved below the outer wall of the vertical cylinder (3), a vertical plate (5) is arranged on both sides of the lower surface of the sleeve ring (4), a first bolt (6) is inserted into the lower surface of the vertical plate (5), the first bolt (6) is threadedly connected with the sleeve ring (4) penetrating the vertical plate (5), a plurality of steel wire bristles (7) are fixedly connected to the surface of the vertical plate (5) away from the vertical cylinder (3), a soft ring (8) is fixedly connected to the bottom end of the vertical cylinder (3), a circular ring (9) is arranged above the sleeve ring (4), a pair of sliding blocks (10) are fixedly connected to the inner wall of the circular ring (9), the sliding blocks (10) are slidingly connected with the vertical cylinder (3) through a sliding groove (11), a sleeve plate (12) is rotatably connected to the outer wall of the circular ring (9), a tooth disc (13) is fixedly connected to the upper surface of the circular ring (9), a tooth column (14) is meshingly connected above the tooth disc (13), a rotating rod (15) is fixedly connected to the inner wall of the tooth column (14), a shell (17) is rotatably connected to the outer wall of the rotating rod (15), the shell (17) is fixedly connected with the rack plate (1), a motor (16) is fixedly connected to the end of the rotating rod (15) away from the tooth column (14), the motor (16) is fixedly connected with the contact surface of the shell (17), a ring groove plate (18) is rotatably connected to the top end of the outer wall of the vertical cylinder (3), and the ring groove plate (18) is connected with the shell (17).

2. The magnetic flux leakage scanning detector for tank bottom plate according to claim 1, characterized in that: The ring groove plate (18) is connected with the shell (17) through a connecting unit, and the connecting unit comprises: two vertical rods (19), the two vertical rods (19) are rotatably connected on both sides of the upper surface of the ring groove plate (18), a compression spring (20) is sleeved on the outer wall of the vertical rod (19), the two ends of the compression spring (20) are fixedly connected with the contact surfaces of the ring groove plate (18) and the shell (17), a protruding rod (21) is fixedly connected to the outer wall of the vertical rod (19) on both sides, a pull ring (22) is fixedly connected to the top end of the vertical rod (19), and the vertical rod (19) can penetrate the shell (17) through a through hole (23).

3. The magnetic flux leakage scanning detector for tank bottom plate according to claim 1, characterized in that: A protection unit is arranged below the shell (17), and the protection unit comprises: a rubber ring (24), the rubber ring (24) is located at the bottom end of the shell (17), the inner wall of the rubber ring (24) is tightly abutted with the outer wall of the vertical cylinder (3), a abutting ring (25) is tightly abutted with the lower surface of the rubber ring (24), a second bolt (26) is inserted into the lower surface of the abutting ring (25), and the second bolt (26) is threadedly connected with the shell (17) penetrating the abutting ring (25) and the rubber ring (24).

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