Magnetic particle testing auxiliary device

Abstract

This invention relates to the field of nondestructive testing technology, specifically to an auxiliary device for magnetic particle testing. It includes a base, rollers connected to the base via a vertically adjustable lifting structure, with multiple rollers arranged at equal height to support tubular workpieces; a clamping structure vertically adjustable and connected to the base to restrict lateral movement of plate-shaped workpieces within the tubular workpiece; an angle adjustment structure located on one side of the base to adjust its tilt angle; a support structure hinged at its upper end to the clamping structure, and vertically adjustable at its lower end supported on the ground on one side of the base to support the plate-to-plate welded workpieces, ensuring the workpieces are tilted; and an illumination structure located on either the lifting or clamping structure to illuminate the weld seam. This auxiliary device, applied to magnetic particle testing, greatly facilitates the movement and rotation of welded workpieces by testing personnel. The device allows personnel to easily adjust the welded workpieces to the required tilt angle, significantly improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of nondestructive testing technology, specifically to a magnetic particle testing auxiliary device. Background Technology

[0002] Magnetic particle testing is a method of observing defects using magnetic particles as the display medium. Depending on the type of magnetic particle medium applied during magnetization, the testing method is divided into wet and dry methods. Based on the duration of magnetic particle application on the workpiece, the inspection method is divided into continuous and residual magnetism methods. When a ferromagnetic workpiece is magnetized, the presence of discontinuities causes local distortion of the magnetic field lines on and near the workpiece surface, generating a leakage magnetic field. This field attracts the magnetic particles applied to the workpiece surface, forming visible magnetic traces under suitable illumination. This reveals the location, size, shape, and severity of the discontinuities, and is also known as magnetic particle inspection or magnetic particle flaw detection, belonging to one of the five conventional methods of non-destructive testing.

[0003] Magnetic particle testing is commonly used for inspecting steel welds, including fillet welds between pipes and plates, circumferential welds between pipes, and straight welds between plates. Magnetic particle testing typically uses a spray-on magnetic particle suspension. After spraying the suspension onto the weld to be inspected, the workpiece is rotated or moved to an angle to facilitate the flow of the suspension. Once magnetized, the discontinuities cause local distortion of the magnetic field lines on and near the workpiece surface, generating a leakage magnetic field. This field attracts the magnetic particles applied to the workpiece surface, forming visible magnetic traces under suitable lighting. This reveals the location, size, shape, and severity of the discontinuities. However, because the workpieces are often steel plate structures, they are heavy and bulky, making movement and rotation difficult. Furthermore, some weld sections are narrow, making it difficult to observe small defects such as cracks, which can easily lead to missed detections and potentially serious, unpredictable consequences. Therefore, there is an urgent need for an auxiliary fixture that allows for easy adjustment of the angle of the workpiece being inspected. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a magnetic particle detection auxiliary device.

[0005] The technical solution of the present invention is: a magnetic particle detection auxiliary device, comprising a base, wherein the base is provided with,

[0006] Multiple rollers are connected to the base via a vertically adjustable lifting structure. The multiple rollers are arranged at intervals to support the tubular workpiece so that the tubular workpiece can rotate on the rollers around its own axis.

[0007] A clamping structure, which is vertically adjustable and connected to the base, is used to restrict the lateral movement of the plate-shaped workpiece in the tube sheet workpiece.

[0008] An angle adjustment structure is provided on one side of the base for adjusting the tilt angle of the base;

[0009] The support structure has its upper end hinged to the clamping structure and its lower end adjustable in vertical tilt angle and supported on the ground on one side of the base. It is used to support the plate-to-plate welding workpiece so that the plate-to-plate welding workpiece is in an inclined state.

[0010] An illumination structure, which is mounted on a lifting structure or a clamping structure, is used to illuminate the weld.

[0011] According to the present invention, a magnetic particle detection auxiliary device includes a lifting structure comprising:

[0012] The first fixing tube is a hollow pipe whose lower end is fixed to the upper surface of the base;

[0013] The first movable tube, the lower end of which is sleeved on the first fixed tube;

[0014] A first knob, on which a first screw is provided;

[0015] The first screw is screwed to the first bolt on the wall of the first fixed pipe. After the height of the first movable pipe is adjusted, the end of the first screw abuts against the outside of the wall of the first movable pipe to fix the first movable pipe to the first fixed pipe.

[0016] According to a magnetic particle detection auxiliary device provided by the present invention, the upper end of the first movable tube is provided with,

[0017] A base plate, which is fixed to the upper end of the first movable tube and is parallel to the upper surface of the base;

[0018] Two side plates are placed on both sides of the bottom plate;

[0019] A pivot shaft, the two ends of which are hinged to two side plates and can rotate about an axis;

[0020] The roller is fixed on the rotating shaft and rotates with the rotating shaft.

[0021] According to a magnetic particle detection auxiliary device provided by the present invention, at least two sets of rollers arranged laterally are provided on the base, and each set of rollers includes at least two rollers arranged longitudinally.

[0022] According to the present invention, a magnetic particle testing auxiliary device is provided, wherein the clamping structure includes a first clamping structure and a second clamping structure arranged laterally at intervals; the first clamping structure includes a first vertical plate and a first universal wheel connected to the first vertical plate; the second clamping structure includes a second vertical plate and a second universal wheel connected to the second vertical plate; the first vertical plate is vertically and laterally adjustable to a base; the second vertical plate is vertically adjustable to a base; the first universal wheel and the second universal wheel are arranged laterally opposite to each other.

[0023] According to the magnetic particle detection auxiliary device provided by the present invention, the first pressing structure includes;

[0024] The second fixing tube is a hollow steel tube that is vertically fixed to the base.

[0025] The second movable tube, the lower end of which is sleeved on the second fixed tube;

[0026] The second knob has a second screw.

[0027] The second screw is screwed to the second bolt on the wall of the second fixed pipe. After the height of the second movable pipe is adjusted, the end of the second screw abuts against the outside of the wall of the second movable pipe to fix the second movable pipe to the second fixed pipe.

[0028] A sleeve, which is fixed to the upper end of the second movable tube, is arranged laterally, and a third knob is provided on the sleeve;

[0029] A crossbar, one end of which passes through a sleeve and the other end of which is connected to the first vertical plate;

[0030] The third knob is fitted with a third screw that passes through the sleeve; the third screw is screwed to a third bolt on the sleeve, and the end of the third screw is pressed against the side of the crossbar after the crossbar position is adjusted to fix the crossbar to the sleeve.

[0031] According to the magnetic particle detection auxiliary device provided by the present invention, the second pressing structure includes,

[0032] The third fixing tube is a hollow steel tube that is vertically fixed to the base.

[0033] The third movable tube, the lower end of which is sleeved on the third fixed tube, and the upper end of which is fixedly connected to the second vertical plate;

[0034] The fourth knob, on which a fourth screw is provided;

[0035] The fourth screw is screwed to the fourth bolt on the wall of the third fixed pipe. After the height of the third movable pipe is adjusted, the end of the fourth screw is pressed against the outside of the wall of the third movable pipe to fix the third movable pipe to the third fixed pipe.

[0036] According to the present invention, a magnetic particle detection auxiliary device includes an angle adjustment structure comprising:

[0037] The first rotating seat is fixed to one side of the base;

[0038] The first support rod has one end rotatably connected to the first rotating seat via a first hinge shaft on the first rotating seat, and the other end is provided with a first support foot that supports the ground.

[0039] The fifth knob is equipped with a fifth screw, which is helically connected to the first rotating seat. When the first support rod is rotated to a set angle, the end of the fifth screw abuts against the first support rod, preventing the first support rod from continuing to rotate upward.

[0040] According to the present invention, a magnetic particle testing auxiliary device includes a support structure comprising:

[0041] The second rotating seat is fixed to one side of the base;

[0042] The second support rod has one end rotatably connected to the second rotating seat via a second hinge shaft on the second rotating seat, and the other end is provided with a second support foot that supports the ground.

[0043] The sixth knob is equipped with a sixth screw, which is helically connected to the second rotating seat. When the second support rod is rotated to a set angle, the end of the sixth screw abuts against the second support rod, preventing the second support rod from continuing to rotate upward.

[0044] According to the magnetic particle detection auxiliary device provided by the present invention, the second support rod includes,

[0045] The fourth fixed tube, the upper end of which is rotatably connected to the second rotating seat via the second hinge shaft;

[0046] The fourth movable tube has one end sleeved on the fourth fixed tube and the other end provided with a second support foot;

[0047] The seventh knob is equipped with a seventh screw, which is screwed to the fourth movable tube. When the extension length of the fourth movable tube is adjusted, the end of the seventh screw abuts against the outside of the fourth fixed tube to fix the fourth movable tube to the fourth fixed tube.

[0048] According to the present invention, a magnetic particle detection auxiliary device includes an illumination structure comprising:

[0049] A support base, which is fixed to a clamping structure or a lifting structure;

[0050] Magnetic base; the magnetic base is magnetically attached and fixed to the support base;

[0051] A lighting fixture, which is connected to a magnetic base via a connecting bracket with adjustable degrees of freedom.

[0052] The advantages of this invention are: 1. The auxiliary device of this invention is applied to the magnetic particle inspection of welds. The roller and clamping structure can support the tube-plate welded workpiece, the support structure can support the plate welded workpiece, and the roller assembly can support the tube welded workpiece. It is also convenient to adjust the angle and rotate. The angle adjustment structure can adjust the observation angle of the weld in a targeted manner. The adjustment method is simple, which can facilitate the detection of magnetic traces. The movement and rotation of the inspection personnel are simple, which improves the inspection efficiency and reduces the inspection difficulty.

[0053] 2. The lifting structure of the present invention is extremely simple. Through the cooperation structure of the first fixed tube and the first movable tube, the first movable tube can be loosened or fixed by turning the first screw with the first knob, which makes it convenient to adjust the height of the roller on the first movable tube and can adapt to different height requirements.

[0054] 3. The roller structure of the present invention is extremely simple. The roller structure is used to support the tubular workpiece. The tubular workpiece can rotate around its own axis on the roller, ensuring that the inspector can clearly see every position of the circumferential weld. The tubular workpiece rotates very easily on the roller.

[0055] 4. The present invention has multiple sets of rollers on the base, with adjacent sets of rollers arranged laterally at intervals, and each set containing at least two rollers arranged longitudinally at intervals. This can conveniently support the tubular workpiece and make the rotation of the tubular workpiece easier.

[0056] 5. The clamping structure of the present invention achieves clamping and fixing through two sets of abutting structures. The abutting structure includes a combination of a vertical plate and a caster wheel. In use, the caster wheel abuts against the side of the plate-shaped workpiece. The two sets of caster wheels abut against the side of the plate-shaped workpiece respectively. The caster wheel only restricts the vertical movement of the plate-shaped workpiece, but does not restrict the rotation of the plate-shaped workpiece. It provides great convenience for the inspection of tube sheet welds and has excellent stability.

[0057] 6. The first clamping structure of the present invention can realize the position adjustment of the first universal wheel in the lateral and vertical directions, which can adapt to the inspection of tube sheet corner welds with different specifications and size requirements. The adjustment method is simple and the stability is good.

[0058] 7. The second clamping structure of the present invention can realize the vertical position adjustment of the second universal wheel, which can adapt to the size requirements of plate-shaped workpieces, facilitate the adjustment by the inspection personnel, and ensure the stability during the inspection process;

[0059] 8. The angle adjustment structure of the present invention is extremely simple. The tilt angle of the base plate can be adjusted by the first support rod. When inspecting the corner weld of the tube sheet, the corner weld can be made to present the tilt angle required by the inspector, which is convenient for inspection. The adjustment method is extremely simple.

[0060] 9. The support structure of the present invention is used for weld inspection of plate-to-plate welded workpieces. By adjusting the required angle with the second support rod, the plate-to-plate welded workpiece can be placed on the second support rod, so that the plate-to-plate welded workpiece can be arranged in the state required by the inspector, which facilitates the flow of magnetic powder suspension and also facilitates the inspection personnel's observation.

[0061] 10. The second support rod of the present invention is a telescopic and adjustable structure. By adjusting the telescopic length of the second support rod, it can adapt to the welding workpieces of different specifications and sizes. The adjustment of the entire structure is extremely simple, which greatly facilitates the observation of the inspection personnel.

[0062] 11. The lighting structure of the present invention is extremely simple. The lighting lamp can be fixed in the required position by the magnetic base, and the lighting position of the lighting lamp can be adjusted at will by the connecting bracket, which facilitates the observation of magnetic marks on the weld.

[0063] The auxiliary device of this invention is applied to magnetic particle inspection, which greatly facilitates the movement and rotation of welded workpieces by the inspectors. With the auxiliary device, the inspectors can easily adjust the welded workpieces to the required tilt angle, which greatly improves the inspection efficiency and has great promotional value. Attached Figure Description

[0064] Figure 1 Side view of the auxiliary device of the present invention;

[0065] Figure 2 : Front view of the auxiliary device of the present invention;

[0066] Figure 3 : Rear view of the auxiliary device of the present invention;

[0067] Figure 4 : A schematic diagram of the lifting structure of the present invention;

[0068] Figure 5 : A schematic diagram of the clamping structure of the present invention;

[0069] Figure 6 : A schematic diagram of the support structure of the present invention;

[0070] Figure 7: A schematic diagram of the angle adjustment structure of the present invention;

[0071] Figure 8 : A schematic diagram of the pipe-to-pipe welding workpiece inspection of the present invention;

[0072] Figure 9 : Schematic diagram of the plate-to-plate welding workpiece inspection of the present invention (side view, without lighting structure);

[0073] Figure 10 : Schematic diagram of the plate-to-plate welding workpiece inspection of the present invention (front view);

[0074] Figure 11 : Schematic diagram of tube sheet welding workpiece inspection according to the present invention;

[0075] Wherein: 1—base; 2—lifting structure; 201—first fixed tube; 202—first movable tube; 203—first knob; 204—base plate; 205—side plate; 206—rotating shaft; 207—roller; 3—clamping structure; 301—first vertical plate; 302—first caster wheel; 303—second vertical plate; 304—second caster wheel; 305—second fixed tube; 306—second movable tube; 307—second knob; 308—sleeve; 309—crossbar; 310—third fixed tube ; 311—Third movable tube; 312—Third knob; 313—Fourth knob; 4—Angle adjustment structure; 401—First rotating seat; 402—First support rod; 403—Fifth knob; 5—Support structure; 501—Second rotating seat; 502—Sixth knob; 503—Fourth fixed tube; 504—Fourth movable tube; 505—Seventh knob; 506—Support platform; 6—Lighting structure; 601—Support seat; 602—Magnetic seat; 603—Lighting lamp; 604—Connecting bracket. Detailed Implementation

[0076] Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0077] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0080] This application relates to an auxiliary device for magnetic particle testing, used to move and rotate workpieces during the magnetic particle testing of welds. The workpieces involved in this application include straight welds of plates, circumferential welds of pipes, and fillet welds of pipes and plates. The workpieces are generally made of steel and are heavy, making manual handling difficult. By using the auxiliary device of this application, the difficulty of handling and moving can be effectively reduced, making it easier for testing personnel to move and rotate the workpieces, and greatly improving the efficiency of magnetic particle weld testing.

[0081] Specific examples Figures 1-11 As shown, the auxiliary device of this application includes a base 1, which serves as the supporting foundation for the entire auxiliary device. The base 1 is a flat plate structure with four supporting legs positioned at its four corners. The base 1 is equipped with multiple rollers, a clamping structure 3, an angle adjustment structure 4, a support structure 5, and a lighting structure 6. The multiple rollers 207 are arranged at intervals to support tubular workpieces, including tubular workpieces in pipe-to-pipe welding and pipe-to-plate welding. The rollers 207 can rotate around a horizontal axis. When a tubular workpiece is placed on a roller 207, it can rotate around its own axis, facilitating the rotation adjustment of the tubular workpiece by the inspection personnel and simplifying the inspection of circumferential welds or fillet welds.

[0082] The lower end of roller 207 is supported by lifting structure 2, which can adjust the vertical height of roller 207. To accommodate the needs of inspectors, the vertical height of all rollers 207 can be adjusted as a whole to meet the requirements of inspectors of different heights. Alternatively, the vertical height of one or several rollers 207 can be adjusted to regulate the levelness of the tubular workpiece placed on the rollers 207, avoiding uneven placement of the tubular workpiece caused by inconsistent heights of multiple rollers 207.

[0083] The clamping structure 3 is vertically adjustable and connected to the base 1. It is used to clamp the plate-shaped workpiece in the tube sheet welded workpiece. When inspecting the tube sheet welded workpiece, it is necessary to adjust the workpiece to an inclined state to facilitate observation of the fillet weld and to facilitate the flow of the magnetic powder suspension. The tubular workpiece is supported by the roller 207. If the clamping structure 3 is not provided, the entire tube sheet welded workpiece may slip off the roller 207. Therefore, this application provides the clamping structure 3 to clamp and limit the plate-shaped structure, preventing the entire tube sheet welded workpiece from slipping during the inspection of the fillet weld.

[0084] An angle adjustment structure 4 is located on one side of the base 1 and is used to adjust the tilt angle of the base 1. When inspecting corner welds, the tube sheet welded workpiece needs to be adjusted to a tilted state so that the axis of the tubular workpiece forms a certain angle with the horizontal direction. This adjustment is achieved by the angle adjustment structure 4. By adjusting the base 1 through the angle adjustment structure 4, the upper surface of the base 1 is tilted. The clamping structure 3 and the roller 207 installed on the base 1 will also be tilted, which facilitates the inspection of the corner welds.

[0085] The upper end of the support structure 5 is hinged to the clamping structure 3, and the lower end is vertically adjustable and supported on the ground on one side of the base 1. It is used to support the plate-to-plate welded workpiece, allowing it to be tilted. The support structure 5 is used to support the plate-to-plate welded workpiece. Existing methods for inspecting weld seams on plate-to-plate workpieces typically use a non-adjustable pad to prop up one side of the workpiece, tilting the entire workpiece. This method has two problems: firstly, the pad is not a standard structure and is difficult to obtain; secondly, the pad cannot be adjusted, making it unsuitable for plate-to-plate welded workpieces of different sizes. The support structure 5 of this application is hinged to the clamping structure 3 at its upper end, allowing for different tilt angles through adjustment of the rotation angle, thus adapting to the needs of plate-to-plate welded workpieces of different sizes.

[0086] The lighting structure 6 of this application is disposed on the lifting structure 2 or the clamping structure 3 for illuminating the weld. The location of the lighting structure 6 is not limited to the lifting structure 2 or the clamping structure 3, as long as it can illuminate and inspect the weld.

[0087] When using this device for inspecting weld seams on pipe-to-pipe welded workpieces, place the entire auxiliary device on a flat surface. If the surface is uneven, adjust the height of the corresponding lifting structure 2 of the roller 207 to ensure the pipe-to-pipe welded workpiece is flat and stable after being placed on the roller 207. To meet the individual needs of the inspectors, all lifting structures 2 can be adjusted simultaneously to ensure the height of the roller 207 meets their requirements. Then, place the pipe-to-pipe welded workpiece on the roller 207, set up the lighting structure 6, and rotate the workpiece so that the circumferential weld seam is illuminated by the lighting structure 6. The inspector observes the magnetic marks on the circumferential weld seam to determine its quality.

[0088] For plate-to-plate welded workpieces, place the auxiliary device on a flat surface and adjust the angle of the support structure 5 so that it presents the angle required by the inspector. This angle can be set according to the size of the plate-to-plate welded workpiece. After adjustment, place the plate-to-plate welded workpiece on the support structure 5, with the upper end of the workpiece resting on the support structure 5 and the lower end resting on the ground. The straight weld seam should be directly facing the inspector. Adjust the position of the lighting structure 6 so that the inspector can clearly observe the straight weld seam. The inspector observes the magnetic marks on the straight weld seam to judge the quality of the weld seam.

[0089] For tube sheet welding workpieces, the auxiliary device is placed on a flat ground. After adjusting the height of all rollers 207 and clamping structure 3, the tilt angle of base 1 is adjusted by angle adjustment structure 4. After reaching the set tilt angle, the tube sheet welding workpiece is placed on the auxiliary device. The tubular workpiece is placed on roller 207, and the plate workpiece is clamped by clamping structure 3, which restricts the lateral movement of the plate workpiece. The inspector slowly rotates the tubular workpiece, adjusts the lighting structure 6, observes the magnetic traces of the fillet weld, and judges the quality of the weld.

[0090] In some embodiments of this application, the above-described lifting structure has been optimized, specifically, as follows: Figures 1-4 As shown, the lifting structure of this embodiment includes a first fixed tube 201, a first movable tube 202, and a first knob 203. The first fixed tube 201 is a hollow tube with its lower end fixed to the upper surface of the base 1. The lower end of the first movable tube 202 is sleeved on the first fixed tube 201, and the first movable tube 202 can move vertically within the first fixed tube 201. A first screw is provided on the first knob 203. The first screw is screwed to a first bolt on the wall of the first fixed tube 201. After the height of the first movable tube 202 is adjusted, the end of the first screw abuts against the outside of the wall of the first movable tube 202 to fix the first movable tube 202 to the first fixed tube 201.

[0091] When the height of the roller 207 needs to be adjusted, the first screw is turned by the first knob 203, so that the end of the first screw is disengaged from the side wall of the first movable tube 202. At this time, the first movable tube 202 can move up and down inside the first fixed tube 201. After adjusting the position of the first movable tube 202, the first knob 203 is turned to screw the first screw into the first fixed tube 201. The end of the first screw is pressed against the outside of the tube wall of the first movable tube 202. The first movable tube 202 is then fixed back onto the first fixed tube 201, thus completing the adjustment of the roller 207.

[0092] In some other embodiments of this application, the structure of the roller 207 described above has been optimized. Specifically, the upper end of the first movable tube 202 is provided with a base plate 204, two side plates 205 and a rotating shaft 206. The base plate 204 is fixed to the upper end of the first movable tube 202 and is parallel to the upper surface of the base 1. The two side plates 205 are placed on both sides of the base plate 204 to form a U-shaped structure with the base plate 204. The two ends of the rotating shaft 206 are hinged to the two side plates 205 and can rotate around the axis. The roller 207 is fixed on the rotating shaft 206 and rotates together with the rotating shaft 206.

[0093] In this embodiment, the rotating shaft 206 is arranged horizontally (when the base 1 is placed flat on the ground, i.e., when the tilt angle of the base 1 is not adjusted), and the roller 207 rotates together with the rotating shaft 206, thereby realizing the rotation adjustment of the tubular workpiece.

[0094] In a further embodiment of this application, the arrangement of the rollers 207 on the base 1 is optimized. Specifically, the base 1 is provided with at least two sets of rollers 207 arranged laterally at intervals, and each set of rollers 207 includes at least two rollers 207 arranged longitudinally at intervals.

[0095] In this embodiment, two sets of rollers 207 are provided on the base 1, and each set of rollers 207 includes two rollers 207, that is, there are a total of four rollers 207 on the base 1. A connecting rod is also provided between each set of rollers 207, and the two ends of the connecting rod are fixedly connected to the first fixed tube 201 corresponding to the roller 207. The connecting rod can improve the stability of the lifting structure 2, and at the same time facilitate the transportation and movement of the entire auxiliary device.

[0096] In some preferred embodiments of this application, the clamping structure 3 described above has been further optimized. Specifically, the clamping structure 3 includes a first abutting structure and a second abutting structure arranged laterally at intervals. The first abutting structure includes a first vertical plate 301 and a first universal wheel 302 that is omnidirectionally connected to the first vertical plate 301. The second abutting structure includes a second vertical plate 303 and a second universal wheel 304 that is omnidirectionally connected to the second vertical plate 303. The first vertical plate 301 is vertically and laterally adjustable to the base 1, and the second vertical plate 303 is vertically adjustable to the base 1. The first universal wheel 302 and the second universal wheel 304 are arranged laterally opposite to each other.

[0097] The first and second clamping structures are positioned on either side of the plate-shaped workpiece in the tube-plate welding workpiece, respectively, clamping the lateral sides of the plate-shaped workpiece and restricting its lateral movement. In effect, this restricts the lateral movement of the entire tube-plate welding workpiece. In use, the second clamping structure acts as the lateral base structure and remains stationary in the lateral direction, while the first clamping structure acts as the active structure, moving laterally to clamp the plate-shaped workpiece, thus achieving lateral positioning of the workpiece. The first caster wheel 302 and the second caster wheel 304 clamp onto the lateral sides of the plate-shaped workpiece but do not restrict its rotation around the axis of the tubular workpiece within the tube-plate welding workpiece.

[0098] In a further embodiment of this application, the first clamping structure described above has been optimized. Specifically, the first clamping structure of this embodiment includes a second fixed tube 305, a second movable tube 306, a second knob 307, a sleeve 308, and a crossbar 309. The second fixed tube 305 is a hollow steel tube vertically fixed to the base 1. The lower end of the second movable tube 306 is sleeved on the second fixed tube 305. A second screw is provided on the second knob 307. The second screw is screwed to a second bolt on the wall of the second fixed tube 305. After the height of the second movable tube 306 is adjusted, the end of the second screw abuts against the outside of the wall of the second movable tube 306 to fix the second movable tube 306 to the second fixed tube 305. The second fixed tube 305, the second movable tube 306, and the second knob 307 enable the vertical movement of the first universal wheel 302.

[0099] Sleeve 308 is fixed to the upper end of the second movable tube 306. Sleeve 308 is arranged laterally. One end of crossbar 309 passes through sleeve 308, and the other end is connected to the first vertical plate 301. A third knob 312 is arranged on sleeve 308. A third screw passing through sleeve 308 is installed on the third knob 312. The third screw is screwed to a third bolt on sleeve 308. After the position of crossbar 309 is adjusted, the end of the third screw abuts against the side of crossbar 309 to fix crossbar 309 to sleeve 308. Sleeve 308 and crossbar 309 realize the lateral movement adjustment of the first universal wheel 302.

[0100] In use, turn the second knob 307 to adjust the vertical height of the second movable tube 306, and turn the third knob 312 to adjust the horizontal position of the first universal wheel 302.

[0101] In other embodiments of this application, the second abutment structure described above is further defined, specifically, as follows: Figures 1-3 As shown in Figure 5, the second clamping structure of this embodiment includes a third fixed tube 310, a third movable tube 311, and a fourth knob 313. The third fixed tube 310 is a hollow steel tube that is vertically fixed on the base 1. The lower end of the third movable tube 311 is sleeved on the third fixed tube 310, and the upper end is fixedly connected to the second vertical plate 303. The fourth knob 313 is provided with a fourth screw, which is screwed to a fourth bolt on the tube wall of the third fixed tube 310. After the height of the third movable tube 311 is adjusted, the end of the fourth screw is pressed against the outside of the tube wall of the third movable tube 311 to fix the third movable tube 311 to the third fixed tube 310.

[0102] The structure formed by the third fixed tube 310, the third movable tube 311, and the fourth knob 313 is similar to the lifting structure described above, and is used for vertical position adjustment. In this embodiment, the structure formed by the third fixed tube 310, the third movable tube 311, and the fourth knob 313 is used for adjusting the height of the second caster wheel 304.

[0103] In some embodiments of this application, the angle adjustment structure described above has been optimized, specifically, as follows: Figures 1-3 The angle adjustment structure shown in Figure 7 includes a first rotating base 401, a first support rod 402, and a fifth knob 403. The first rotating base 401 is fixed to one side of the base 1 (e.g., Figure 1 As shown, the first rotating seat 401 is located on the left side of the base 1; one end of the first support rod 402 is rotatably connected to the first rotating seat 401 via the first hinge shaft on the first rotating seat 401, and the other end is provided with a first support foot supporting the ground; a fifth screw is provided on the fifth knob 403, and the fifth screw is screwed to the first rotating seat 401. When the first support rod 402 is flipped to a set angle, the end of the fifth screw abuts against the first support rod 402, restricting the first support rod 402 from continuing to flip upward.

[0104] When angle adjustment is required, mainly when inspecting weld seams on tube sheet welded workpieces, turn the fifth knob 403 to unscrew the fifth screw, flip the first support rod 402, adjust the angle of the first support rod 402 so that the first support foot is supported on the ground, and position the base 1 at the angle required by the inspector. Then tighten the fifth knob 403 so that the end of the fifth screw is pressed against the first support rod 402, preventing the first support rod 402 from continuing to flip upward.

[0105] In some embodiments of this application, the above-described support structure has been optimized, specifically as follows: Figures 1-3 As shown in Figure 6, the support structure includes a second rotating seat 501, a second support rod, and a sixth knob 502. The second rotating seat 501 is fixed to one side of the base 1. One end of the second support rod is rotatably connected to the second rotating seat 501 via a second hinge shaft on the second rotating seat 501, and the other end is provided with a second support foot supporting the ground. The sixth knob 502 is provided with a sixth screw, which is helically connected to the second rotating seat 501. When the second support rod is flipped to a set angle, the end of the sixth screw abuts against the second support rod, restricting the second support rod from continuing to flip upward.

[0106] When inspecting the weld seam of a plate-to-plate welded workpiece, turn the sixth knob 502 to disengage the sixth screw from the second support rod. Rotate the second support rod to achieve the desired tilt angle. Turn the sixth knob 502 to fix the second support rod in place. The lower end of the second support rod is supported on the ground. Then, place the upper end of the plate-to-plate welded workpiece on the second support rod and the lower end on the ground to form the desired observation angle.

[0107] In a further embodiment of this application, the second support rod described above has been optimized, specifically, as follows: Figure 6 As shown, the second support rod includes a fourth fixed tube 503, a fourth movable tube 504, and a seventh knob 505. The second support rod is a telescopic structure. The upper end of the fourth fixed tube 503 is rotatably connected to the second rotating seat 501 through a second hinge shaft. One end of the fourth movable tube 504 is sleeved on the fourth fixed tube 503, and the other end is provided with a second support foot. The seventh knob 505 is provided with a seventh screw, which is screwed to the fourth movable tube 504. When the extension length of the fourth movable tube 504 is adjusted, the end of the seventh screw abuts against the outside of the tube wall of the fourth movable tube 504 to fix the fourth movable tube 504 to the fourth fixed tube 503.

[0108] The upper end of the fourth movable tube 504 is provided with an annular support platform 506, which facilitates the placement of the plate-to-plate welding workpiece. In use, turning the seventh knob 505 disengages the end of the seventh screw from the fourth movable tube 504, adjusting the extension length of the fourth movable tube 504 relative to the fourth fixed tube 503. After adjustment, turning the seventh knob 505 presses the end of the seventh screw against the outer wall of the fourth movable tube 504, restricting the fourth movable tube 504 to the fourth fixed tube 503, thus completing the length adjustment of the second support rod. The lower end of the fourth movable tube 504 is provided with an inclined second support foot, which rests on the ground during use.

[0109] In other embodiments of this application, the lighting structure 6 described above has been optimized, specifically, as follows: Figure 2As shown, the lighting structure includes a support base 601, a magnetic base 602, and a lighting lamp 603. The support base 601 is fixed to the clamping structure 3 or the lifting structure 2, which is actually fixed to the first fixing tube 201 or the third fixing tube 310. The magnetic base 602 is attached to the support base 601. The support base 601 itself is made of ferromagnetic material, and the magnetic base 602 can be easily attached to the support base 601, which facilitates the arrangement of the lighting structure 6. The lighting lamp 603 is connected to the magnetic base 602 through a connecting bracket 604 with adjustable degrees of freedom.

[0110] In practical applications, when inspecting the weld seams of pipe-to-pipe welded workpieces, such as... Figure 8 As shown, the auxiliary device is placed on a flat surface. The first knob 203 is turned to allow the first movable tube 202 to move up and down within the first fixed tube 201. After the vertical position of the roller 207 is adjusted, the first knob 203 is turned to fix the first movable tube 202 onto the first fixed tube 201. After all rollers 207 are adjusted, the pipe-to-pipe welding workpiece is moved onto the roller 207, with the axis of the workpiece parallel to the axis of the roller 207. The circumferential weld of the workpiece is positioned between the two sets of rollers 207. The magnetic base 602 in the lighting structure 6 is placed on a suitable support 601. The position of the lighting lamp 603 is adjusted so that it clearly illuminates the circumferential weld. The inspector rotates the pipe-to-pipe welding workpiece and observes the magnetic traces on the circumferential weld to determine its quality.

[0111] When inspecting welds on sheet-to-sheet welded workpieces, such as Figures 9-10 As shown, place the auxiliary device on a flat surface, and turn the sixth knob 502 and the seventh knob 505 to allow the fourth fixed tube 503 and the fourth movable tube 504 to move. Adjust the length and tilt angle of the second support rod to achieve the required length and angle, then turn the sixth knob 502 and the seventh knob 505 to fix the fourth fixed tube 503 and the fourth movable tube 504 in place. Then place the plate-to-plate welded workpiece to be inspected onto the second support rod. The upper end of the plate-to-plate welded workpiece rests on the support platform 506 of the second support rod, and the lower end rests on the ground, so that the straight weld is arranged vertically at an angle. Place the magnetic seat 602 in the lighting structure 6 onto the appropriate support seat 601, and adjust the position of the lighting lamp 603 so that the lighting lamp 603 can clearly illuminate the straight weld. The inspector observes the magnetic traces of the straight weld to judge the quality of the straight weld.

[0112] When inspecting welds on tube sheet welded workpieces, such as Figure 11As shown, place the auxiliary device on a flat surface, adjust the vertical height of the roller 207, and adjust the vertical height of the first caster wheel 302 and the second caster wheel 304. Turn the fifth knob 403 to rotate the first support rod 402 and adjust its angle so that the base 1 is at the angle required by the inspector. After completion, turn the fifth knob 403 to fix the first support rod 402. At this time, the first support leg of the first support rod 402 is supported on the ground, and the base 1 is tilted. Move the tube sheet welding workpiece onto the roller 207, with the right side of the plate-shaped workpiece pressed against the second caster wheel 304. Turn the third knob 312 to adjust the lateral position of the crossbar 309 so that the first caster wheel 302 is pressed against the right side of the plate-shaped workpiece. After completion, turn the third knob 312 to fix the crossbar 309 onto the sleeve 308. Place the magnetic base 602 in the lighting structure 6 onto the appropriate support base 601, adjust the position of the lighting lamp 603 so that the lighting lamp 603 can clearly illuminate the fillet weld. The inspector rotates the tube sheet welding workpiece and observes the magnetic trace of the fillet weld to judge the quality of the fillet weld.

[0113] like Figure 1 As shown, the horizontal direction of this application is Figure 1 The left and right directions in the middle, the horizontal left side is Figure 1 The left side of the middle, and the right side horizontally. Figure 1 On the right side of the middle, vertically Figure 1 The direction perpendicular to the paper, vertical refers to Figure 1 The up and down directions in the middle.

[0114] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic particle detection aid comprising a base (1) characterised in that: The base is provided with, A plurality of rollers connected to the base (1) by vertically adjustable lifting structures (2), the plurality of rollers being arranged at intervals for supporting the tubular workpiece so that the tubular workpiece can rotate around its own axis on the rollers; A clamping structure (3) vertically connected to the base (1) for limiting the lateral movement of the plate-shaped workpiece in the tubular workpiece, the clamping structure comprising first and second abutting structures arranged at intervals in the lateral direction; the first abutting structure comprising a first vertical plate (301) and a first universal wheel (302) connected to the first vertical plate (301) in a universal manner; the second abutting structure comprising a second vertical plate (303) and a second universal wheel (304) connected to the second vertical plate (303) in a universal manner; the first vertical plate (301) being vertically and laterally adjustable connected to the base (1); the second vertical plate (303) being vertically adjustable connected to the base (1); the first and second universal wheels (302, 304) being arranged opposite in the lateral direction; An angle adjusting structure (4) provided on one side of the base (1) for adjusting the inclination angle of the base (1); A support structure (5) hingedly connected to the clamping structure (3) at the upper end and supported on the ground on one side of the base (1) in a vertically adjustable manner for supporting the plate-shaped workpiece in an inclined state; An illumination structure (6) provided on the lifting structure (2) or the clamping structure (3) for illuminating the weld; The first abutting structure comprises, A second fixed pipe (305) which is a hollow steel pipe vertically fixed on the base (1); A second movable pipe (306) having a lower end sleeved on the second fixed pipe (305); A second knob (307) provided with a second screw rod; The second screw rod is screw-connected to a second screw on the pipe wall of the second fixed pipe (305), and the end of the second screw rod is abutted on the outer side of the pipe wall of the second movable pipe (306) after the height adjustment of the second movable pipe (306) is completed, thereby fixing the second movable pipe (306) on the second fixed pipe (305); A sleeve (308) fixed on the upper end of the second movable pipe (306), the sleeve (308) being arranged in the lateral direction, and the sleeve (308) being provided with a third knob (312); A crossbar (309) having one end penetrating the sleeve (308) and the other end connected to the first vertical plate (301); The third knob (312) is provided with a third screw rod penetrating the sleeve (308); the third screw rod is screw-connected to a third screw on the sleeve (308), and the end of the third screw rod is abutted on the side of the crossbar (309) after the position adjustment of the crossbar (309) is completed, thereby fixing the crossbar (309) on the sleeve (308); The second abutting structure comprises, A third fixed pipe (310) is a hollow steel pipe vertically fixed on the base (1); A third movable pipe (311) is sleeved at the lower end of the third fixed pipe (310) and fixedly connected with the second vertical plate (303) at the upper end; A fourth knob (313) is provided with a fourth screw rod; The fourth screw rod is screw-connected with a fourth bolt on the wall of the third fixed pipe (310), and the end of the fourth screw rod is abutted against the outside of the wall of the third movable pipe (311) to fix the third movable pipe (311) on the third fixed pipe (310) after the height adjustment of the third movable pipe (311) is completed.

2. A magnetic particle detection aid as claimed in claim 1, characterised in that: The lifting structure comprises, A first fixed pipe (201) is a hollow pipe fixed at the lower end of the upper end surface of the base (1); A first movable pipe (202) is sleeved at the lower end of the first fixed pipe (201); A first knob (203) is provided with a first screw rod; The first screw rod is screw-connected with a first bolt on the wall of the first fixed pipe (201), and the end of the first screw rod is abutted against the outside of the wall of the first movable pipe (202) to fix the first movable pipe (202) on the first fixed pipe (201) after the height adjustment of the first movable pipe (202) is completed.

3. A magnetic particle detection aid as claimed in claim 2, characterised in that: The upper end of the first movable pipe (202) is provided with, A bottom plate (204) is fixed at the upper end of the first movable pipe (202) and parallel to the upper surface of the base (1); Two side plates (205) are arranged on the two sides of the bottom plate (204); A rotating shaft (206) is rotatably connected to the two side plates (205) through the two ends thereof; The roller (207) is fixed on the rotating shaft (206) and rotates with the rotating shaft (206).

4. A magnetic particle detection aid as claimed in claim 2, characterised in that: At least two groups of rollers (207) are arranged on the base (1) in the transverse direction, and each group of rollers (207) comprises at least two rollers (207) arranged in the longitudinal direction.

5. A magnetic particle detection aid as defined in claim 1, wherein: The angle adjusting structure comprises, A first rotating seat (401) is fixed on one side of the base (1); A first supporting rod (402) is rotatably connected to the first rotating seat (401) through a first hinge shaft on the first rotating seat (401) at one end and provided with a first supporting leg abutting against the ground at the other end; A fifth knob (403) is provided with a fifth screw rod, and the fifth screw rod is screw-connected with the first rotating seat (401). When the first supporting rod (402) is flipped to a set angle, the end of the fifth screw rod is abutted against the first supporting rod (402) to limit the first supporting rod (402) from being continuously flipped upward.

6. A magnetic particle detection aid as defined in claim 1, wherein: The supporting structure comprises, A second rotating seat (501) is fixed on one side of the base (1); A second supporting rod is rotatably connected to the second rotating seat (501) through a second rotating seat (501) and a second hinge shaft at one end, and is provided with a second supporting leg supporting the ground at the other end; A sixth knob (502) is provided with a sixth screw rod, which is screw-connected to the second rotating seat (501), and the end of the sixth screw rod abuts against the second supporting rod when the second supporting rod is turned to a set angle, thereby limiting the second supporting rod from continuing to turn upward.

7. A magnetic particle detection aid as defined in claim 1, wherein: The lighting structure comprises, A supporting seat (601) is fixed on the clamping structure (3) or the lifting structure (2); A magnetic seat (602) is fixed on the supporting seat (601) by magnetic attraction; A lighting lamp (603) is connected to the magnetic seat (602) through a connection support (604) with adjustable degrees of freedom.

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