Corner scanner for storage tank bottom plate

Abstract

The utility model provides a corner scanner for a storage tank bottom plate, and relates to the technical field of nondestructive testing. The device comprises a detection unit and an operation rod. The detection unit comprises an armature, permanent magnets are arranged at the front end and the rear end of the lower side face of the armature respectively, and a detection assembly is arranged on the armature and located between the two permanent magnets. The detection assembly comprises a probe support, a mounting groove is formed in the lower side face of a probe, and a detection circuit board is arranged in the mounting groove. A front support is arranged at the front end of the armature, and a front walking assembly is arranged on the front support. A rear support is arranged at the rear end of the armature, and the operating rod is connected with the rear support through a connecting shaft. The connecting shaft is rotationally connected with the rear support through a first bearing assembly, the upper end of the connecting shaft is rotationally connected with the operating rod through a pin shaft, and a rear walking assembly is arranged at the lower end of the connecting shaft. The corner scanner for the storage tank bottom plate is compact and small in structure, light in weight and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of nondestructive testing, in particular to an edge and corner scanner for a storage tank bottom plate. Background Art

[0002] When there are defects or structural abnormalities in the material, the magnetic permeability in the leakage magnetic field will change, which will cause the magnetic flux in the magnetic circuit to be distorted, and the direction of the magnetic induction line will change. Part of the magnetic flux will directly pass through the defect or bypass the defect inside the material, and part of the magnetic flux will leak to the surface of the material and then enter the material, thus forming a leakage magnetic field on the surface of the material. The non-destructive testing technology developed based on this principle is called magnetic flux leakage testing. Compared with other non-destructive testing technologies, magnetic flux leakage flaw detection technology has the advantages of fast detection speed, accurate detection results, and low requirements for the surface cleanliness of the workpiece being tested. Therefore, it is widely used in inspection and testing equipment.

[0003] With the aging of old storage tanks and the deterioration of crude oil quality, storage tank safety accidents occur frequently. Storage tank safety accidents will not only cause significant waste of resources and environmental pollution, but may also cause tension in the country's energy supply and affect the development of the national economy. The economic losses are difficult to estimate. More serious storage tank safety accidents may even endanger people's lives and have serious social impacts.

[0004] During long-term operation, mild corrosion of the tank may become more and more serious, causing the steel plate to become thinner and deformed. If no maintenance is done, it will cause penetration and perforation, and even tank bottom collapse and tank collapse accidents. From the actual use situation, tank corrosion is most likely to occur on the bottom plate, and the corrosion of the tank bottom plate is the most common and also the most serious. According to relevant data investigation and analysis, in the tank shutdown caused by corrosion and oil leakage of crude oil tanks, bottom plate corrosion accounts for 76.4%.

[0005] The existing tank bottom plate detection device is relatively wide, which is suitable for rapid scanning and detection of most areas of the tank bottom plate. However, due to volume limitations, it is impossible to detect the bottom plate in some areas of the tank, such as those close to the vertical wall and the heating side pipe. Utility Model Content

[0006] In response to the above problems, the present application provides a corner scanner for a tank bottom plate, which has a compact structure, is lightweight, and is easy to operate, and can conveniently perform a comprehensive inspection of the tank bottom plate.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A corner scanner for a tank bottom plate, comprising a detection unit and an operating rod;

[0009] The detection unit comprises an armature, and permanent magnets are respectively arranged at the front and rear ends of the lower side of the armature, and a detection component is arranged on the armature between the two permanent magnets;

[0010] The detection assembly comprises a probe bracket, a mounting groove is arranged on the lower side of the probe, and a detection circuit board is arranged in the mounting groove;

[0011] A front bracket is provided at the front end of the armature, and a front walking assembly is provided on the front bracket;

[0012] A rear bracket is provided at the rear end of the armature, and the operating rod is connected to the rear bracket via a connecting shaft;

[0013] The connecting shaft is rotatably connected to the rear bracket via a first bearing assembly, the upper end of the connecting shaft is rotatably connected to the operating rod via a pin, and the lower end of the connecting shaft is provided with a rear travel assembly.

[0014] Furthermore, a wear-resistant sheet for sealing the mounting groove is provided at the lower opening of the mounting groove.

[0015] Furthermore, magnetic concentrating sheets are respectively arranged on both sides of the detection circuit board in the installation groove.

[0016] Furthermore, an adjusting rod is provided on the armature, the adjusting rod is threadedly connected to the armature, the lower end of the adjusting rod is connected to the probe bracket, the probe bracket can move up and down relative to the adjusting rod, and the adjusting rod is provided with a spring for pressing the probe bracket downward.

[0017] Furthermore, the front bracket includes a front baffle and two ear plates arranged on the front baffle, the front walking assembly includes a front rotating shaft arranged between the two ear plates, and a front roller is arranged on the front rotating shaft between the two ear plates. The rear bracket includes a rear baffle, a mounting plate is arranged at the upper end of the rear baffle, a mounting cylinder is arranged on the mounting plate, the connecting shaft is rotatably connected to the mounting cylinder through a second bearing assembly, and the rear walking assembly includes a rear rotating shaft fixedly connected to the connecting shaft, and a rear roller is arranged on the rear rotating shaft.

[0018] Furthermore, a plurality of second ribs are arranged between the mounting tube and the mounting plate, a limiting ring capable of rotating along with the connecting shaft is arranged on the connecting shaft, a limiting rod is arranged on the limiting ring, and the limiting rod is limited between two adjacent second ribs.

[0019] Furthermore, side baffles are respectively provided at the left and right ends of the armature, a front support plate extending rearward is provided at the lower end of the front baffle, a first vertical plate extending upward is provided at the rear end of the front support plate, the front bracket, armature and side baffles jointly form a cavity for accommodating the front permanent magnet, a rear support plate extending forward is provided at the lower end of the rear baffle, a second vertical plate extending upward is provided at the front end of the rear support plate, and the rear bracket, armature and side baffles jointly form a cavity for accommodating the rear permanent magnet.

[0020] Furthermore, a data processing integrated machine is arranged on the operating rod, and the data processing integrated machine is connected to the detection circuit board via a cable.

[0021] Furthermore, the detection circuit board comprises a circuit board body, on which two rows of Hall sensors are evenly arranged in a transverse direction, and the two rows of Hall sensors are staggered.

[0022] The beneficial effects of the utility model are:

[0023] The corner scanner for the tank bottom provided in the embodiment of the present application is compact and light in structure, and easy to operate compared with the traditional tank bottom detection device. It can realize the leakage magnetic detection of the bottom plate in some areas of the tank close to the vertical wall, heating side pipe, etc., adapt to different on-site working conditions, reduce the detection blind area, and realize the full range detection of the tank bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a corner scanner for a tank bottom plate provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0026] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part B;

[0027] Figure 4 The figure is a schematic diagram of the installation structure of the data processing integrated machine;

[0028] Figure 5 It is the main view of the detection unit;

[0029] Figure 6 for Figure 5 AA section view in;

[0030] Figure 7 for Figure 5 BB section view in;

[0031] Figure 8is a top view of the detection unit;

[0032] Fig. 9 for Figure 8 CC section view in;

[0033] Fig.10 for Fig. 9 A schematic diagram of the enlarged structure of the middle C part;

[0034] Fig.11 This is a schematic diagram of the three-dimensional structure of the detection unit after the side baffle is removed;

[0035] Fig.12 It is an exploded view of the detection unit;

[0036] Fig.13 Schematic diagram of the three-dimensional structure of the limiting ring;

[0037] Fig.14 This is a schematic diagram of the structure of the detection circuit board.

[0038] In the figure: 1, detection unit; 11, armature; 12, permanent magnet; 13, detection assembly; 131, probe bracket; 1311, web; 1312, wing plate; 1313, connecting plate; 132, detection circuit board; 1321, circuit board body; 1322, Hall sensor; 1323, inductive sensor; 133, wear-resistant sheet; 134, magnetic sheet; 135, adjustment rod; 136, adjustment handle; 137, spring; 138, limit pressure plate; 14, front bracket; 1411, front baffle; 1412, ear plate; 1421, front support plate; 1422, first vertical plate; 15, front walking assembly; 151 , front shaft; 152, front roller; 153, second bearing assembly; 154, bushing; 16, rear bracket; 1611, rear baffle; 1612, mounting plate; 1613, first rib plate; 1614, mounting tube; 1615, second rib plate; 1621, rear support plate; 1622, second vertical plate; 171, connecting shaft; 172, first bearing assembly; 173, fixing nut; 174, connecting tee; 175, limiting ring; 1751, limiting rod; 1752, positioning boss; 18, rear walking assembly; 181, rear shaft; 182, rear roller; 183, third bearing assembly; 19, side baffle;

[0039] 2. Operating lever; 21. T-handle;

[0040] 3. Pin;

[0041] 4. All-in-one data processing machine;

[0042] 51. First cable; 511. Female aviation plug; 52. Second cable; 521. Male aviation plug;

[0043] 61. Fixer; 611. Clamping block; 612. First locking assembly; 62. Equipment fixing plate; 63. Support plate; 64. Second locking assembly. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application, and the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative work on the basis of the embodiments of the present application shall belong to the protection scope of the present application.

[0045] For the convenience of description, the coordinate system is defined as Figure 1 As shown, the left-right direction is the horizontal direction, the front-back direction is the longitudinal direction, and the up-down direction is the vertical direction.

[0046] like Figure 1 As shown, a corner scanner for a tank bottom plate comprises a detection unit 1 and an operating rod 2, one end of the operating rod 2 is connected to the detection unit 1 through a connecting shaft 171. The operating rod 2 has the freedom to swing up and down relative to the detection unit 1 and rotate in a horizontal plane.

[0047] like Fig.11 and Fig.12 As shown, the detection unit 1 includes an armature 11, and permanent magnets 12 are respectively arranged at the front and rear ends of the lower side of the armature 11. The armature 11 and the permanent magnets 12 together form a U-shaped structure with an opening facing downward. A detection component 13 is arranged between the two permanent magnets 12 on the armature 11.

[0048] like Figure 8 , Fig. 9 and Fig.10 As shown, the detection assembly 13 includes a probe bracket 131 arranged on the armature 11, a mounting groove is arranged on the lower side of the probe, and a detection circuit board 132 for detecting the magnetic field is arranged in the mounting groove.

[0049] As a specific implementation, the permanent magnet 12 described in this embodiment is a neodymium iron boron permanent magnet 12 .

[0050] Furthermore, if Fig.10As shown, a wear-resistant sheet 133 for sealing the mounting groove is provided at the lower opening of the mounting groove, and the wear-resistant sheet 133 is sealed and fixed by epoxy resin. Preferably, the wear-resistant sheet 133 is made of wear-resistant ceramic. Considering that the probe bracket may be rubbed by protrusions such as welds on the bottom plate of the tank, the wear-resistant sheet can protect the components in the mounting groove to avoid collision and scratches.

[0051] Furthermore, if Fig.10 As shown, magnetic collecting plates 134 are respectively arranged on both sides of the detection circuit board 132 in the installation groove. The magnetic collecting plates 134 are made of materials with high magnetic permeability, such as industrial pure iron, Permalloy, etc. The magnetic field of the leakage magnetic part can be strengthened by setting the magnetic collecting plates 134, thereby improving the sensitivity of detection.

[0052] Furthermore, if Fig. 9 and Fig.10 As shown, the armature 11 is provided with adjusting rods 135 at both ends of the probe bracket 131, and the adjusting rod 135 is threadedly connected to the armature 11. The upper end of the adjusting rod 135 is provided with an adjusting handle 136, and the lower end of the adjusting rod 135 is connected to the probe bracket 131. The probe bracket 131 can move up and down relative to the adjusting rod 135, and the adjusting rod 135 is provided with a spring 137 between the armature 11 and the probe bracket 131 for pressing the probe bracket 131 downward. Under the pushing action of the spring 137, the probe bracket 131 is in a floating state, so that when there is a convex or concave part on the bottom plate of the storage tank, the existence of the spring 137 can make the probe bracket 131 always fit with the bottom plate of the storage tank, thereby ensuring the reliability of the detection.

[0053] As a specific implementation method, Fig.10 and Fig.12 As shown, the probe support 131 described in this embodiment includes a web 1311, and the front and rear ends of the web 1311 are respectively provided with wing plates 1312 extending upward. The web 1311 and the wing plates 1312 together form a U-shaped structure with an opening facing upward. The mounting groove is provided on the lower side of the web 1311, and a connecting plate 1313 corresponding to the adjusting rod 135 is provided above the web 1311 between the two wing plates 1312, and the two ends of the connecting plate 1313 are respectively fixedly connected to the wing plates 1312 by welding. The lower end of the adjusting rod 135 passes through the corresponding connecting plate 1313 and extends to the bottom of the connecting plate 1313. The connecting plate 1313 is provided with an avoidance hole for accommodating the adjusting rod 135. A limiting pressure plate 138 is provided on the adjusting rod 135 below the connecting plate 1313.

[0054] Furthermore, the position limiting pressure plate 138 includes a mounting portion in a planar structure, and the mounting portion is fixedly connected to the lower end surface of the adjusting rod 135 by screws. A conical portion is provided at the edge of the mounting portion, and the large end of the conical portion is pressed against the connecting plate 1313 under the elastic action of the spring 137. In this way, the structural strength of the position limiting pressure plate 138 can be improved, thereby preventing the position limiting pressure plate 138 from being deformed during use.

[0055] like Fig.11 As shown, the front end of the armature 11 is provided with a front bracket 14, and the front travel assembly 15 is provided on the front bracket 14. The rear end of the armature 11 is provided with a rear bracket 16, and the operating rod 2 is connected to the rear bracket 16 through a connecting shaft 171.

[0056] like Figure 5 and Figure 6 As shown, the connecting shaft 171 is rotatably connected to the rear bracket 16 through the first bearing assembly 172, the upper end of the connecting shaft 171 is rotatably connected to the operating rod 2 through the pin 3, the operating rod 2 can swing up and down relative to the connecting shaft 171, and the lower end of the connecting shaft 171 is provided with a rear travel assembly 18. The rear travel assembly 18 can rotate in a plane with the connecting shaft 171, thereby realizing steering.

[0057] As a specific implementation method, Figure 7 , Fig.11 and Fig.12 As shown, the front bracket 14 described in this embodiment includes a front baffle 1411, and the upper end of the front baffle 1411 is fixedly connected to the armature 11 by screws. Two ear plates 1412 are arranged on the front side of the front baffle 1411. The front travel assembly 15 includes a front shaft 151 arranged between the two ear plates 1412, and a front roller 152 is arranged on the front shaft 151 between the two ear plates 1412, and the front roller 152 is rotatably connected to the front shaft 151 through a second bearing assembly 153. Exemplarily, two front rollers 152 are arranged on the front shaft 151 between the two ear plates 1412, and a sleeve 154 for axially positioning the front roller 152 is arranged between the two front rollers 152 and between the front roller 152 and the ear plate 1412.

[0058] As a specific implementation method, Figure 5 , Figure 6 and Fig.12As shown, the rear bracket 16 described in this embodiment includes a rear baffle 1611, and the upper end of the rear baffle 1611 is fixedly connected to the armature 11 by screws. The upper end of the rear baffle 1611 is provided with a mounting plate 1612 extending to the rear side perpendicular to the rear baffle 1611, and a plurality of first ribs 1613 are evenly arranged in the horizontal direction between the mounting plate 1612 and the rear baffle 1611. The mounting plate 1612 is provided with a mounting cylinder 1614, and the connecting shaft 171 is located in the mounting cylinder 1614 and is rotatably connected to the mounting cylinder 1614 through the first bearing assembly 172. Exemplarily, the mounting plate 1612 is provided with a through hole for accommodating the mounting cylinder 1614, and the mounting cylinder 1614 is inserted into the through hole, and the middle part of the mounting cylinder 1614 is fixedly connected to the mounting plate 1612 by welding. The rear travel assembly 18 includes a rear shaft 181, and the middle portion of the rear shaft 181 is fixedly connected to the lower end portion of the connecting shaft 171. Rear rollers 182 are respectively arranged on both sides of the connecting shaft 171 on the rear shaft 181, and the rear rollers 182 are rotatably connected to the rear shaft 181 through a third bearing assembly 183.

[0059] As a specific implementation, the first bearing assembly 172 described in this embodiment adopts a flange bearing, and two flange bearings are arranged between the connecting shaft 171 and the mounting cylinder 1614. The flange ends of the two flange bearings are arranged back to back, and the mounting cylinder 1614 is located between the flange ends of the two flange bearings. A limited shaft shoulder is arranged below the lower flange bearing on the connecting shaft 171, and a fixing nut 173 is arranged above the upper flange bearing on the connecting shaft 171. Under the locking action of the fixing nut 173, the mounting cylinder 1614 is clamped between the flange ends of the two flange bearings.

[0060] As a specific implementation, the lower end of the connecting shaft 171 in this embodiment is fixedly connected to the rear rotating shaft 181 via a connecting tee 174, and the connecting shaft 171 and the rear rotating shaft 181 are respectively fixedly connected to the connecting tee 174 via set screws (not shown in the figure).

[0061] Furthermore, if Figure 3 and Figure 6As shown, a plurality of second ribs 1615 are arranged above the mounting plate 1612 between the mounting tube 1614 and the mounting plate 1612, and the plurality of second ribs 1615 are evenly arranged along the circumferential direction. A limiting ring 175 capable of rotating with the connecting shaft 171 is arranged on the connecting shaft 171, and a limiting rod 1751 extending downward is arranged on the limiting ring 175, and the limiting rod 1751 is limited between two adjacent second ribs 1615. The steering angle is limited by the cooperation of the limiting rod 1751 and the second ribs 1615, so as to prevent the turning angle from being too large, causing friction between the rear roller 182 and the rear bracket 16.

[0062] As a specific implementation, the limiting ring 175 described in this embodiment is clamped and fixed between the fixing nut 173 and the flange bearing located on the upper side. Fig.13 As shown, the inner side of the limiting ring 175 is provided with a positioning boss 1752, and the connecting shaft 171 is provided with a positioning groove (not shown) for accommodating the positioning boss 1752. Here, the limiting ring 175 can also be fixedly connected to the connecting shaft 171 by a set screw.

[0063] Furthermore, if Fig. 9 , Fig.11 and Fig.12 As shown, the left and right ends of the armature 11 are respectively provided with side baffles 19, and the upper end of the side baffles 19 is fixedly connected to the armature 11 by screws. The lower end of the front baffle 1411 of the front bracket 14 is provided with a front support plate 1421 extending to the rear side, and the rear end of the front support plate 1421 is provided with a first vertical plate 1422 extending upward, and the upper end of the first vertical plate 1422 abuts against the armature 11. The front bracket 14, the armature 11 and the two side baffles 19 jointly form a cavity for accommodating the front permanent magnet 12. The lower end of the rear baffle 1611 is provided with a rear support plate 1621 extending forward, and the front end of the rear support plate 1621 is provided with a second vertical plate 1622 extending upward, and the upper end of the second vertical plate 1622 abuts against the armature 11. The rear bracket 16, the armature 11 and the two side baffles 19 jointly form a cavity for accommodating the rear permanent magnet 12.

[0064] As a specific implementation, the front support plate 1421 and the first vertical plate 1422 described in this embodiment are an integrated structure, and the front baffle 1411 is fixedly connected to the front support plate 1421 by screws. The rear support plate 1621 and the second vertical plate 1622 are an integrated structure, and the rear baffle 1611 and the mounting plate 1612 are an integrated structure, and the lower end of the rear baffle 1611 is fixedly connected to the rear support plate 1621 by screws.

[0065] Furthermore, a protrusion is provided on the lower side of the armature 11 , and the protrusion is clamped between the first vertical plate 1422 of the front bracket 14 and the second vertical plate 1622 of the rear bracket 16 .

[0066] Furthermore, if Figure 1 As shown, a data processing integrated machine 4 is disposed on the operating rod 2, and the data processing integrated machine 4 is connected to the detection circuit board 132 through a cable.

[0067] As a specific implementation, the cable described in this embodiment includes a first cable 51 and a second cable 52. An aviation plug female head 511 is fixedly arranged on the armature 11, and the aviation plug female head 511 is connected to the detection circuit board 132 through the first cable 51, and an escape hole for accommodating the first cable 51 is arranged on the upper bottom surface of the mounting groove. An aviation plug male head 521 matching with the aviation plug female head 511 is arranged at one end of the second cable 52, and a connector matching with the interface of the data processing integrated machine 4 is arranged at the other end of the second cable 52.

[0068] Furthermore, if Figure 1 As shown, the data processing integrated machine 4 is mounted on the operating rod 2 through a mounting bracket. Figure 2 and Figure 4 As shown, the mounting bracket includes a fixture 61, a device fixing plate 62, and a support plate 63 for connecting the fixture 61 and the device fixing plate 62. The fixture 61 includes a clamping block 611 for clamping the operating rod 2, and a first locking assembly 612 is respectively arranged on both sides of the operating rod 2 between the two clamping blocks 611. The first locking assembly 612 includes a locking bolt and a locking nut, and the locking nut adopts a butterfly nut or a knurled nut that is convenient for manual tightening. One end of the support plate 63 is rotatably connected to the locking bolt close to the side of the detection unit 1, and the friction force of the support plate 63 rotating relative to the fixture 61 is adjusted by adjusting the locking nut, so that the support plate 63 is maintained at an angle. The other end of the support plate 63 is rotatably connected to the device fixing plate 62 through a second locking assembly 64. The second locking assembly 64 has the same structure as the first locking assembly 612, and will not be repeated here. The data processing all-in-one machine 4 is fixedly connected to the device fixing plate 62 by screws.

[0069] Furthermore, the operating rod 2 adopts a telescopic structure, and a T-shaped handle 21 is provided at the upper end of the operating rod 2 .

[0070] Furthermore, if Fig.14As shown, the detection circuit board 132 includes a circuit board body 1321, and two rows of Hall sensors 1322 are evenly arranged in the horizontal direction are arranged on the circuit board body 1321, and the two rows of Hall sensors 1322 are staggered. This can improve the sensitivity and coverage of the detection to ensure a comprehensive and efficient scanning of the workpiece surface to capture possible small defects and ensure high sensitivity.

[0071] Furthermore, if Fig.14 As shown, inductive sensors 1323 for distinguishing inner and outer walls of defects are uniformly arranged along the horizontal direction on the circuit board body 1321.

[0072] Other embodiments obtained by those skilled in the art by combining, splitting, reorganizing, etc. the embodiments of the present application on the basis of the embodiments provided in the present application do not exceed the protection scope of the present application.

[0073] The above specific implementation methods have detailed the purpose, technical solutions and beneficial effects of the embodiments of the present application. The above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. That is, any modifications, equivalent substitutions, improvements, etc. made on the basis of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A corner scanner for a tank bottom plate, characterized in that: It comprises a detection unit (1) and an operating rod (2); The detection unit (1) comprises an armature (11), the front and rear ends of the lower side of the armature (11) are respectively provided with permanent magnets (12), and a detection component (13) is provided on the armature (11) between the two permanent magnets (12); The detection component (13) comprises a probe bracket (131), a mounting groove is provided on the lower side of the probe, and a detection circuit board (132) is provided in the mounting groove; A front bracket (14) is provided at the front end of the armature (11), and a front travel assembly (15) is provided on the front bracket (14); A rear bracket (16) is provided at the rear end of the armature (11), and the operating rod (2) is connected to the rear bracket (16) via a connecting shaft (171); The connecting shaft (171) is rotatably connected to the rear bracket (16) via a first bearing assembly (172); the upper end of the connecting shaft (171) is rotatably connected to the operating rod (2) via a pin shaft (3); and the lower end of the connecting shaft (171) is provided with a rear travel assembly (18).

2. The corner scanner for tank bottom plate according to claim 1, characterized in that: A wear-resistant sheet (133) is provided at the lower opening of the installation groove.

3. The corner scanner for tank bottom plate according to claim 1, characterized in that: Magnetic collecting sheets (134) are respectively arranged on both sides of the detection circuit board (132) in the installation groove.

4. The corner scanner for tank bottom plate according to claim 1, characterized in that: The armature (11) is provided with an adjusting rod (135), the adjusting rod (135) is threadedly connected to the armature (11), the lower end of the adjusting rod (135) is connected to the probe bracket (131), the probe bracket (131) can move up and down relative to the adjusting rod (135), and the adjusting rod (135) is provided with a spring (137) for pressing the probe bracket (131) downward.

5. The corner scanner for tank bottom plate according to claim 1, characterized in that: The front bracket (14) comprises a front baffle (1411) and two ear plates (1412) arranged on the front baffle (1411); the front walking assembly (15) comprises a front rotating shaft (151) arranged between the two ear plates (1412); a front roller (152) is arranged on the front rotating shaft (151) between the two ear plates (1412); the rear bracket (16) comprises a rear baffle (1611); A mounting plate (1612) is provided at the upper end of the rear baffle (1611), a mounting tube (1614) is provided on the mounting plate (1612), the connecting shaft (171) is rotatably connected to the mounting tube (1614) via a second bearing assembly (153), and the rear traveling assembly (18) comprises a rear rotating shaft (181) fixedly connected to the connecting shaft (171), and a rear roller (182) is provided on the rear rotating shaft (181).

6. The corner scanner for tank bottom plate according to claim 5, characterized in that: A plurality of second ribs (1615) are arranged between the mounting tube (1614) and the mounting plate (1612); a limiting ring (175) capable of rotating along with the connecting shaft (171) is arranged on the connecting shaft (171); a limiting rod (1751) is arranged on the limiting ring (175); and the limiting rod (1751) is limited between two adjacent second ribs (1615).

7. The corner scanner for tank bottom plate according to claim 5, characterized in that: The left and right ends of the armature (11) are respectively provided with side baffles (19); the lower end of the front baffle (1411) is provided with a front support plate (1421) extending toward the rear side; the rear end of the front support plate (1421) is provided with a first vertical plate (1422) extending upward; the front bracket (14), the armature (11) and the side baffles (19) together form a cavity for accommodating the front permanent magnet (12); the lower end of the rear baffle (1611) is provided with a rear support plate (1621) extending forward; the front end of the rear support plate (1621) is provided with a second vertical plate (1622) extending upward; the rear bracket (16), the armature (11) and the side baffles (19) together form a cavity for accommodating the rear permanent magnet (12).

8. The corner scanner for tank bottom plate according to claim 1, characterized in that: The operating rod (2) is provided with a data processing integrated machine (4), and the data processing integrated machine (4) is connected to the detection circuit board (132) via a cable.

9. The corner scanner for tank bottom plate according to claim 1, characterized in that: The detection circuit board (132) comprises a circuit board body (1321), on which two rows of Hall sensors (1322) are evenly arranged in the transverse direction, and the two rows of Hall sensors (1322) are staggered.

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