Magnetic particle detection device for welding seam of bottom plate of storage tank

Abstract

The utility model discloses a magnetizing device which comprises a magnetizing mechanism, a magnetic suspension spraying mechanism, a defect observing mechanism, a driving motor, a trolley, an illuminating lamp, a control button and a power supply. The magnetizing mechanism is a rotating magnetic field flaw detector and is mounted on the cart, a magnetizing end at the lower end of the magnetizing mechanism can penetrate through the bottom of the cart, and during use, the lower end of the magnetizing mechanism can magnetize a welding seam area of a workpiece. The magnetic suspension spraying mechanism is mounted on the cart, and a spraying opening, used for discharging liquid, of the magnetic suspension spraying mechanism can penetrate through the bottom of the cart and is formed in the side of the magnetizing mechanism. And the defect observation mechanism is arranged on the upper surface of the trolley and is provided with a camera for observing magnetic marks on the surface of the magnetized workpiece, and the camera is arranged on the lower surface of the trolley. According to the storage tank bottom plate welding seam magnetic particle detection device, the magnetic field flaw detector can be conveniently moved during detection, so that the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nondestructive testing, in particular to a magnetic particle testing device for welding seams of a bottom plate of a storage tank. Background Art

[0002] Storage tanks are usually used to store production raw materials or industrial products. Their working environment is complex and harsh, and they are prone to corrosion and other damage. Among the components of the storage tank, the bottom plate is the place where problems are more likely to occur. And on the bottom plate, the weakest part is the weld between the bottom plates. According to the provisions of the "Vertical Cylindrical Steel Welded Storage Tank Construction Specifications": "The butt welds of the tank bottom edge plates with a minimum standard yield strength greater than 390MPa should be subjected to penetration testing after the root weld is completed; after the last layer of welding is completed, penetration testing or magnetic particle testing should be performed again."

[0003] Magnetic particle testing is a method of observing defects using magnetic particles as a display medium. During the inspection, when the welded ferrous workpiece is magnetized, due to the presence of cracks or discontinuities inside it, the magnetic lines of force on the surface and near the surface of the workpiece will be locally distorted to produce a leakage magnetic field, thereby adsorbing the magnetic particles applied to the surface of the workpiece to form visually visible magnetic marks under appropriate lighting, thereby showing the location, size, shape and severity of the discontinuity in the weld.

[0004] At present, in the process of magnetic particle inspection for the welds of the bottom plate of the storage tank, a spray-type magnetic particle suspension is usually used. After the suspension is sprayed on the weld, a magnetic field flaw detector is moved at the weld, and a hand-held lighting lamp is used to observe the magnetic traces. This method requires continuous hand-held magnetic field flaw detectors and lighting lamps. Since the magnetic field flaw detector itself has a certain weight and the flaw detector needs to be moved frequently during inspection, the inspector needs to bend over to operate during the movement. It is inconvenient to use, time-consuming, labor-intensive and inefficient. In the long run, it will cause damage to the spine and lumbar muscles of the inspectors, which has a great impact on their health.

[0005] Therefore, a magnetic particle detection device for the weld of the bottom plate of a storage tank is needed to solve the above problems. Utility Model Content

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A magnetic particle detection device for a tank bottom plate weld comprises a magnetizing mechanism, a magnetic suspension spraying mechanism, a defect observation mechanism, a driving motor, a trolley, a lighting lamp, a control button and a power supply.

[0008] Among them, the magnetizing mechanism is a rotating magnetic field flaw detector, which is installed on a cart, and the magnetizing end at its lower end can pass through the bottom of the cart. When in use, the lower end of the magnetizing mechanism can magnetize the weld area of ​​the workpiece.

[0009] The magnetic suspension liquid spraying mechanism is installed on the trolley, and the spraying port of the magnetic suspension liquid spraying mechanism for discharging liquid can pass through the bottom of the trolley and be arranged beside the magnetization mechanism.

[0010] The defect observation mechanism is installed on the upper surface of the cart, and is provided with a camera for observing magnetic marks on the surface of the magnetized workpiece, and the camera is installed on the lower surface of the cart.

[0011] The driving motor is installed on the upper surface of the cart. Several wheels are arranged at the lower end of the cart. The output end of the driving motor is connected to the wheels through a worm gear. Two wheels are arranged at the front end of the cart. The two wheels are connected to each other through a connecting shaft. The worm gear is arranged on the connecting shaft. The worm gear is installed at one end of the output shaft of the driving motor. The worm gear and the worm gear are meshed and connected with each other. The cart is provided with two rear wheels, and the two rear wheels are universal wheels with a brake function.

[0012] Preferably, the defect observation mechanism includes a display screen, a connecting rod and a fixed cylinder. The cart is provided with two layers, the bottom of the fixed cylinder is provided on the upper layer of the cart. The lower end of the connecting rod is provided inside the fixed cylinder in a liftable manner, the upper end of the connecting rod is hingedly provided with the display screen, and the display screen is connected to the camera on the lower surface of the cart through a wire. By providing the connecting rod and the fixed cylinder, the height of the display screen can be adjusted according to the height of the operator, so as to meet the use needs of different groups of people.

[0013] Preferably, the magnetic suspension spraying mechanism comprises a pressure pump, a magnetic suspension bottle and a liquid spray pipe. The pressure pump is arranged on the lower layer of the cart. The magnetic suspension bottle is threadedly connected to the liquid inlet of the pressure pump. When the magnetic suspension bottle is used up, the empty bottle can be removed, and then the unused magnetic suspension bottle can be installed at the liquid inlet of the pressure pump to continue the operation. The liquid inlet of the liquid spray pipe is connected to the liquid outlet of the pressure pump, and the liquid outlet of the liquid spray pipe can pass through the cart and be arranged at the bottom of the cart, and it points to the magnetization end of the magnetization mechanism.

[0014] The power supply is arranged on the upper surface of the lower layer of the cart and is located beside the booster pump. The power supply is electrically connected to the magnetization mechanism, the magnetic suspension spraying mechanism, the defect observation mechanism and the driving motor through wires. A support plate is connected below the display screen, and a number of control buttons are arranged on the support plate, and the control buttons are electrically connected to the magnetization mechanism, the magnetic suspension spraying mechanism, the defect observation mechanism and the driving motor respectively. The lighting lamp is arranged at the bottom of the cart. The lighting lamp is made of a corrugated tube material and can be bent and arranged at the bottom of the cart. With such an arrangement, when the angle of the lighting lamp needs to be adjusted, the corrugated tube can be directly bent to adjust the lighting angle.

[0015] The tank bottom plate weld magnetic particle detection device also includes support rods, which include four support rods, which are respectively arranged at the four corners between the upper layer and the lower layer of the cart. By such arrangement, the upper layer and the lower layer of the cart can be effectively fixed, so that the display screen on the upper layer can be stably supported. In order to facilitate the operator to push and control the direction of the cart, a push handle is also arranged on the upper layer of the cart.

[0016] Preferably, a second nozzle, a second magnetization mechanism and a second camera are provided on one side of the lower layer of the cart, the working surface of the second magnetization mechanism is obliquely arranged on the lower layer of the cart, the second nozzle and the second camera are fixedly connected to the second magnetization mechanism, the second nozzle is connected to the liquid outlet of the pressure pump, the second nozzle is used to spray magnetic suspension on the fillet weld; magnetic suspension, the second magnetization mechanism is used to magnetize the magnetic suspension sprayed by the second nozzle on the fillet weld, the second camera is communicatively connected to the display screen, and the second camera is used to observe the magnetic traces of the fillet weld.

[0017] Furthermore, a shut-off valve is provided on the pipeline connecting the second nozzle and the liquid outlet of the pressure pump.

[0018] Due to the adoption of the above technical solution, the technical progress achieved by the utility model compared with the prior art is as follows: the present application installs the magnetizing mechanism on the cart so that when the operator is conducting weld inspection, the cart can be directly driven instead of the manual hand-held magnetizing device, effectively avoiding the risk of spinal and lumbar muscle damage caused by bending over during manual inspection; in addition, through the setting of the magnetic suspension spraying mechanism and the defect observation mechanism, the operator can simultaneously spray the magnetic suspension and use the defect observation mechanism to observe the inspection part while driving the cart, effectively reducing the frequency of bending over by the operator, thereby improving the work efficiency. Secondly, the fillet weld can be magnetized and observed by the second nozzle, the second magnetizing mechanism and the second camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a magnetic particle detection device for a tank bottom plate weld according to the utility model;

[0021] Figure 2 This is another schematic diagram of a magnetic particle detection device for a tank bottom plate weld according to the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a magnetic particle detection device for a tank bottom plate weld according to the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of a magnetic particle detection device for a tank bottom plate weld according to the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of a magnetic particle detection device for a tank bottom plate weld according to the utility model;

[0025] Main component symbols

[0026] 1. Magnetization mechanism; 2. Magnetic suspension spraying mechanism; 21. Pressure pump; 22. Magnetic suspension; 23. Spray pipe; 3. Defect observation mechanism; 31. Camera; 32. Display screen; 33. Connecting rod; 34. Fixing cylinder; 4. Cart; 5. Driving motor; 6. Wheel; 7. Illuminating lamp; 8. Control button; 9. Power supply; 10. Support plate; 11. Support rod; 12. Push handle; 101. Second nozzle; 102. Second magnetization mechanism; 103. Second camera; 104. Shut-off valve; 61. Connecting shaft; 62. Worm gear; 63. Worm; 64. Rear wheel.

[0027] The following specific implementation will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0028] In order to make the technical personnel in the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by the technical personnel in the technical field of the utility model. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] See also Figure 1-5 The embodiment of the utility model provides a magnetic particle detection device for a tank bottom plate weld, comprising a magnetization mechanism 1, a magnetic suspension spraying mechanism 2, a defect observation mechanism 3, a driving motor 5, a trolley 4, a lighting lamp 7, a control button 8 and a power supply 9.

[0031] Among them, the magnetizing mechanism 1 is a rotating magnetic field flaw detector, which is installed on the cart 4, and the magnetizing end at its lower end can pass through the bottom of the cart 4. When in use, the lower end of the magnetizing mechanism 1 can magnetize the weld area of ​​the workpiece.

[0032] The magnetic suspension liquid spraying mechanism 2 is installed on the trolley 4 , and the spraying port of the magnetic suspension liquid spraying mechanism 2 for discharging liquid can pass through the bottom of the trolley 4 and be arranged beside the magnetizing mechanism 1 .

[0033] The defect observation mechanism 3 is installed on the upper surface of the cart 4 , and has a camera 31 for observing magnetic marks on the surface of the magnetized workpiece, and the camera 31 is installed on the lower surface of the cart 4 .

[0034] The driving motor 5 is mounted on the upper surface of the cart 4. Several wheels 6 are arranged at the lower end of the cart 4. The output end of the driving motor 5 is connected to the wheels 6 by a worm gear. In this embodiment, two wheels 6 are arranged at the front end of the cart 4. The two wheels 6 are connected to each other by a connecting shaft 61. A worm gear 62 is arranged on the connecting shaft 61. A worm gear 63 is mounted on one end of the output shaft of the driving motor 5. The worm gear and the worm gear are meshed and connected with each other. The cart 4 is provided with two rear wheels 64, and the two rear wheels 64 are universal wheels with a brake function.

[0035] refer to Figure 3 Specifically, the defect observation mechanism 3 includes a display screen 32, a connecting rod 33 and a fixed cylinder 34. The cart 4 is provided with two layers, the bottom of the fixed cylinder 34 is provided on the upper layer of the cart 4. The lower end of the connecting rod 33 is provided inside the fixed cylinder 34 in a liftable manner, and the upper end of the connecting rod 33 is hingedly provided with the display screen 32, and the display screen 32 is connected to the camera 31 on the lower surface of the cart 4 through a wire. By providing the connecting rod 33 and the fixed cylinder 34, the height of the display screen 32 can be adjusted according to the height of the operator, so as to meet the use needs of different groups of people.

[0036] refer to Figure 4Specifically, the magnetic suspension spraying mechanism 2 includes a pressure pump 21, a magnetic suspension bottle 22 and a liquid spraying pipe 23. The pressure pump 21 is arranged at the lower layer of the cart 4. The magnetic suspension bottle 22 is threadedly connected to the liquid inlet of the pressure pump 21. When the magnetic suspension bottle 22 is used up, the empty magnetic suspension bottle 22 can be removed, and then the unused magnetic suspension bottle 22 can be installed at the liquid inlet of the pressure pump 21 to continue the operation. The liquid inlet of the liquid spraying pipe 23 is connected to the liquid outlet of the pressure pump 21, and the liquid outlet of the liquid spraying pipe 23 can pass through the cart 4 and be arranged at the bottom of the cart 4, and it points to the magnetization end of the magnetization mechanism 1. In this embodiment, the liquid spraying pipe 23 adopts a combined pipe. By setting it in this way, when it is necessary to adjust the spraying angle of the liquid spraying pipe 23, the combined pipe can be directly bent to adjust the spraying angle. The magnetic suspension bottle 22 stores magnetic suspension.

[0037] The power supply 9 is arranged on the upper surface of the lower layer of the cart 4 and is located next to the pressure pump 21. The power supply 9 is electrically connected to the magnetization mechanism 1, the magnetic suspension spraying mechanism 2, the defect observation mechanism 3 and the driving motor 5 through wires. A support plate 10 is connected below the display screen 32. A plurality of control buttons 8 are arranged on the support plate 10, and the plurality of control buttons 8 are electrically connected to the magnetization mechanism 1, the magnetic suspension spraying mechanism 2, the defect observation mechanism 3 and the driving motor 5, respectively. The lighting lamp 7 is arranged at the bottom of the cart 4. The lighting lamp 7 is made of a corrugated tube material and can be bent and arranged at the bottom of the cart 4. By so arranging, when the angle of the lighting lamp 7 needs to be adjusted, the corrugated tube can be directly bent to adjust the lighting angle.

[0038] The tank bottom plate weld magnetic particle detection device also includes a support rod 11, which includes four support rods 11. The four support rods 11 are respectively arranged at the four corners between the upper layer and the lower layer of the cart 4. By such an arrangement, the upper layer and the lower layer of the cart 4 can be effectively fixed, so that the display screen 32 of the upper layer can be stably supported. In order to facilitate the operator to push and control the direction of the cart 4, a push handle 12 is also provided on the upper layer of the cart 4.

[0039] The method of using the magnetic particle detection device for the weld of the bottom plate of the storage tank is as follows: when in use, the rotation of the driving motor 5 drives the cart 4 to move forward, and when the cart 4 moves forward to the designated position to be detected, the pressure pump 21 is started, so that the magnetic suspension spraying mechanism 2 sprays the magnetic suspension in the magnetic suspension bottle 22 at the position to be detected; then the magnetization mechanism 1 is started to magnetize the detection area, and when there are cracks or discontinuities inside the detection area, the magnetic lines of force on the surface and near the surface of the workpiece will be locally distorted to generate a leakage magnetic field, thereby adsorbing the magnetic powder applied to the surface of the workpiece, thereby forming a visually visible magnetic mark; then the imaging of the magnetic mark can be intuitively observed through the display screen 32 of the defect observation mechanism 3, which effectively reduces the waist muscle damage caused by the inspection personnel who need to bend over to observe; when the light in the detection area is dark, the lighting lamp 7 is driven to provide auxiliary lighting for the detection area.

[0040] refer to Figure 5 Specifically, a second nozzle 101, a second magnetizing mechanism 102 and a second camera 103 are provided on one side of the lower layer of the cart 4. The working surface of the second magnetizing mechanism 102 is obliquely arranged on the lower layer of the cart 4. The second nozzle 101 and the second camera 103 are fixedly connected to the second magnetizing mechanism 102. The second nozzle 101 is connected to the liquid outlet of the pressure pump 21. The second nozzle 101 is used to spray magnetic suspension on the fillet weld; magnetic suspension, the second magnetizing mechanism 102 is used to magnetize the magnetic suspension sprayed by the second nozzle 101 on the fillet weld, the second camera 103 is connected to the display screen 32 for communication, and the second camera 103 is used to observe the magnetic traces of the fillet weld.

[0041] The second magnetizing mechanism 102 is a rotating magnetic field flaw detector.

[0042] Furthermore, a shut-off valve 104 is provided on the pipeline connecting the second nozzle 101 and the liquid outlet of the pressure pump 21 .

[0043] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A magnetic particle inspection device for tank bottom plate welds, characterized in that: It includes a magnetizing mechanism, a magnetic suspension spraying mechanism, a defect observation mechanism, a driving motor, a cart, a lighting lamp, a control button and a power supply; The magnetizing mechanism is a rotating magnetic field flaw detector, which is mounted on a cart, and the magnetizing end at the lower end thereof can pass through the bottom of the cart. When in use, the lower end of the magnetizing mechanism can magnetize the weld area of ​​the workpiece; The magnetic suspension liquid spraying mechanism is installed on the cart, and the spraying port of the magnetic suspension liquid spraying mechanism for discharging liquid can pass through the bottom of the cart and be arranged beside the magnetization mechanism; The defect observation mechanism is installed on the upper surface of the cart, and is provided with a camera for observing magnetic marks on the surface of the magnetized workpiece, and the camera is installed on the lower surface of the cart.

2. The tank bottom plate weld magnetic particle inspection device according to claim 1, characterized in that: The driving motor is installed on the upper surface of the cart; a plurality of wheels are arranged at the lower end of the cart, and the output end of the driving motor and the wheels are drivably connected via a worm gear; two wheels are arranged at the front end of the cart, and the two wheels are connected to each other via a connecting shaft, a worm gear is arranged on the connecting shaft, and a worm gear is installed at one end of the output shaft of the driving motor, and the worm gear and the worm gear are meshed and connected to each other; the cart is provided with two rear wheels, and the two rear wheels are universal wheels with a braking function.

3. The magnetic particle inspection device for tank bottom plate weld according to claim 2, characterized in that: The defect observation mechanism includes a display screen, a connecting rod and a fixed cylinder; wherein the cart is provided with an upper and lower layer, and the bottom of the fixed cylinder is arranged on the upper layer of the cart; the lower end of the connecting rod is arranged in a liftable manner inside the fixed cylinder, and the upper end of the connecting rod is hinged to the display screen, and the display screen is connected to the camera on the lower surface of the cart through a wire.

4. The magnetic particle inspection device for tank bottom plate weld according to claim 3, characterized in that: The magnetic suspension spraying mechanism comprises a pressure pump, a magnetic suspension bottle and a liquid spraying pipe; the pressure pump is arranged on the lower layer of the cart; the magnetic suspension bottle is threadedly connected to the liquid inlet of the pressure pump; the liquid inlet of the liquid spraying pipe is connected to the liquid outlet of the pressure pump, and the liquid outlet of the liquid spraying pipe can pass through the cart and is arranged at the bottom of the cart, and it points to the magnetization end of the magnetization mechanism.

5. The magnetic particle inspection device for tank bottom plate weld according to claim 4, characterized in that: The power supply is arranged on the upper surface of the lower layer of the cart and is located next to the pressure pump. The power supply is electrically connected to the magnetization mechanism, the magnetic suspension spraying mechanism, the defect observation mechanism and the driving motor through wires; a supporting plate is connected below the display screen, and a plurality of control buttons are arranged on the supporting plate, and the plurality of control buttons are electrically connected to the magnetization mechanism, the magnetic suspension spraying mechanism, the defect observation mechanism and the driving motor respectively; the lighting lamp is arranged at the bottom of the cart.

6. The magnetic particle inspection device for tank bottom plate weld according to claim 5, characterized in that: A second nozzle, a second magnetizing mechanism and a second camera are arranged on one side of the lower layer of the cart. The working surface of the second magnetizing mechanism is arranged obliquely on the lower layer of the cart. The second nozzle and the second camera are fixedly connected to the second magnetizing mechanism. The second nozzle is connected to the liquid outlet of the pressure pump. The second nozzle is used to spray magnetic suspension on the fillet weld; the magnetic suspension, the second magnetizing mechanism is used to magnetize the magnetic suspension sprayed by the second nozzle on the fillet weld, the second camera is connected to the display screen for communication, and the second camera is used to observe the magnetic traces of the fillet weld.

7. The magnetic particle inspection device for tank bottom plate weld according to claim 6, characterized in that: A shut-off valve is arranged on the pipeline connecting the second nozzle and the liquid outlet of the pressure pump.

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