Array eddy current detection device for detecting fillet weld crack of small connecting pipe of branch pipe platform

Abstract

The invention discloses an array eddy current detection device for branch pipe table small connecting pipe fillet weld crack detection, and relates to the field of small connecting pipe fillet weld crack detection, the array eddy current detection device specifically comprises an eddy current array detection host and a multifunctional instrument box, the multifunctional instrument box comprises a bottom shell and a top cover, and the bottom shell and the top cover are hinged through a hinge. According to the invention, the eddy current array detection host is arranged to cooperate with the high-temperature welding seam scanner and the high-temperature pen type scanner to rapidly detect the fillet welding seam crack of the small connecting pipe of the branch pipe table, the eddy current array is mainly utilized to rapidly complete detection on the outer surface of a detected workpiece, and crack defects on the surface and at the position 6mm away from the interior can be detected; on-line non-stop detection can be carried out at the temperature of 240 DEG C, cracks can be quantified through calibration of the calibration test block, the detection speed can reach 300 mm per second, the detection efficiency is high, the sensitivity is high, the penetrating power is high, and the detection result can be visually displayed and recorded through a modular display.

Description

Technical Field

[0001] The invention relates to the field of small pipe fillet weld crack detection, in particular to an array eddy current detection device for small pipe fillet weld crack detection of a pipe branch platform. Background Art

[0002] Small pipe connections are one of the common structural forms on pressure vessels and pressure pipelines in refining and chemical plants. The "Guidelines for the Management of Small Pipe Connections in Refining and Chemical Plants" (Second Edition), drafted and compiled by the Corrosion and Protection Work Center of China Petroleum Refining and Chemical Enterprises in 2023, stipulates: Direct holes are opened on the equipment body or pipeline, and the structures of half-pipe joints, branch seats, and branch pipes of DN50mm and below that are connected by welding are collectively referred to as small pipe connections. Such as safety accessories, instruments (thermocouples, pressure gauges, liquid level gauges and flow meters), drainage drains, steam sweep lines, exhaust valves and jumpers connected to the container body or pipeline, generally the pipelines within the first valve are collectively referred to as small pipe connections;

[0003] The characteristics of small connecting pipes are small diameter, thin wall, large structural changes, discontinuous geometry, and the medium does not flow here to form a blind end. During the manufacturing and use process, it is more likely to produce defects such as incomplete penetration and cracks than longitudinal and circumferential butt welds. It is the focus and difficulty in equipment safety management. The current ultrasonic A-scan detection efficiency is low, and it is necessary to apply coupling agent and clean the pipe wall coating before detection, which is more troublesome. Summary of the invention

[0004] The object of the present invention is to provide an array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides an array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms, comprising an eddy current array detection host and a multifunctional instrument box, wherein the multifunctional instrument box comprises a bottom shell and a top cover, the bottom shell and the top cover are hingedly connected by a hinge, an inner liner is provided in the middle of the bottom shell, and a groove is provided on the upper surface of the inner liner for placing the eddy current array detection host, a modular display, a high-temperature weld scanner and a high-temperature pen scanner:

[0007] The eddy current array detection host is connected to the modular display circuit via a data line. Two probe interfaces are provided at the front end of the eddy current array detection host. The probe interfaces are connected to a high-temperature weld scanner or a high-temperature pen scanner through wires.

[0008] Preferably, a protective frame is provided on the outside of the modular display and the eddy current array detection host, and the four corners of the protective frame located on the outside of the modular display are integrally formed with wear-resistant corner guards, and the wear-resistant corner guards are fixed to the polyurethane sheath by screws, and the polyurethane sheath is mounted on the outside of the modular display.

[0009] Preferably, an upper loading plate is fixed on the top of the eddy current array detection host, and limiting rings are fixed on the front and rear sides of the top of the upper loading plate, and the pressing end of the limiting ring is provided with a screw thread for tightening the threaded sleeve, the threaded sleeve is sleeved on the other end of the limiting ring, and a resistance block is fixed on the other end of the limiting ring.

[0010] Preferably, a download plate is fixed to the bottom of the eddy current array detection host by screws, the outer contour of the download plate is a T-shaped structure, and a positioning box is clamped on the outside of the download plate, and movable holes for the hooks to stretch are provided at both ends of the positioning box, and a guide column adapted to the guide groove in the middle of the hook is fixed inside each movable hole, and the two hooks are connected by a tension spring.

[0011] Preferably, a plurality of shock absorbers are evenly spaced at the bottom of the bottom shell, the load-bearing end of the shock absorber is fixed to the bottom of the inner tank, a plurality of connecting blocks are also fixed to the bottom of the bottom shell, and the upper end of each connecting block is threadedly connected to a contact head, and a rubber conical head is fixed to the top of each contact head.

[0012] Preferably, a cavity for the movement of the contact plate is opened at the lower end of the top cover, and guide rails adapted to the side slide grooves of the contact plate are integrally formed on both sides of the cavity, a sponge block that contacts the upper surface of the inner liner is fixed to the lower surface of the contact plate, a film-coated pressure sensor is installed between the sponge block and the contact plate, and the film-coated pressure sensor is connected to the controller circuit on the side of the top cover.

[0013] Preferably, the contact plate and the opposite surface of the cavity are fixed to the upper and lower ends of the telescopic airbag by Velcro, the front end of the telescopic airbag is connected to the air injection pipe through the air nozzle, and the air injection pipe passes through the cavity and extends to the interior of the installation cavity to communicate with a small dual-purpose air pump, and the other end of the small dual-purpose air pump passes through the side of the installation cavity and extends to one side of the top cover.

[0014] Preferably, a multifunctional cavity for placing a backup battery is provided inside the top cover, and the backup battery is connected to the solar photovoltaic panel circuit on the top surface of the top cover through a wire, and the backup battery is also connected to an inverter, and the inverter is connected to the power replenishment interface circuit on the side of the top cover through a wire, and the front end of the power replenishment interface is covered with a silicone plug, and the backup battery is connected to the controller circuit through a wire.

[0015] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0016] The present invention plays a role in rapid detection of cracks in the small corner welds of branch pipe platforms by setting up an eddy current array detection host in conjunction with a high-temperature weld scanner and a high-temperature pen scanner. It mainly utilizes eddy current array technology to perform rapid detection without pretreatment of the detection pad. The eddy current array can quickly complete the detection on the outer surface of the inspected workpiece, and can detect crack defects at 6 mm on the surface and inside. The temperature can be detected online without stopping at 240°C. The cracks can be quantified by calibration of the calibration test block. The detection speed can reach 300 mm per second. The detection efficiency is high, the sensitivity is high, and the penetration ability is strong. The detection results can be intuitively displayed and recorded through a modular display, and can be completed at least a few days earlier than conventional detection methods, thereby improving the efficiency of the detection personnel and saving time and economic losses for the owners. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 It is a schematic diagram of the main structure of the parts of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the combined parts of the eddy current array detection host, modular display and high temperature pen scanner in the present invention;

[0020] Figure 3 It is a cross-sectional schematic diagram of the combined parts structure of the bottom shell, the inner tank and the shock absorber in the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the top cover, backup battery, contact plate and small dual-purpose air pump in the present invention;

[0022] Figure 5 yes Figure 1 A part structure enlarged schematic diagram;

[0023] Figure 6 yes Figure 2 The enlarged schematic diagram of the structure of the part B in FIG.

[0024] Figure 7 yes Figure 2 The enlarged schematic diagram of the C part structure;

[0025] Figure 8 yes Figure 2 The enlarged schematic diagram of the D part structure;

[0026] Fig. 9 yes Figure 2 The enlarged schematic diagram of the structure of the E part parts;

[0027] Fig.10 yes Figure 4 The enlarged schematic diagram of the structure of the F part;

[0028] Fig.11 yes Figure 5 The enlarged schematic diagram of the G part structure;

[0029] Fig.12 is a schematic diagram of the arrangement of coils of the eddy current array in the present invention;

[0030] Fig.13 is a schematic diagram of the operation of the coil of the eddy current array of the present invention;

[0031] In the figure:

[0032] 1. Bottom shell; 2. Top cover; 3. Hinge; 4. Inner liner; 5. Eddy current array detection host; 6. Modular display; 7. High temperature weld scanner; 8. High temperature pen scanner; 9. Protective frame; 10. Wear-resistant corner guard; 11. Polyurethane sheath; 12. Loading board; 13. Limiting ring buckle; 14. Threaded sleeve; 15. Screw thread; 16. Resistance block; 17. Download board; 18. Positioning box; 19. Hook; 20. Guide Steering column; 21. Tension spring; 22. Shock absorber; 23. Connecting block; 24. Contact head; 25. Rubber cone head; 26. Contact plate; 27. Guide rail; 28. Sponge block; 29. ​​Film-coated pressure sensor; 30. Controller; 31. Velcro; 32. Telescopic airbag; 33. Small dual-purpose air pump; 34. Backup battery; 35. Solar photovoltaic panel; 36. Inverter; 37. Power supply interface; 38. Silicone plug. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0034] See also Figure 1 - Fig.13 , an array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms, comprising an eddy current array detection host 5 and a multifunctional instrument box, the multifunctional instrument box comprising a bottom shell 1 and a top cover 2, the bottom shell 1 and the top cover 2 are hinged by a hinge 3, an inner liner 4 is provided in the middle of the bottom shell 1, and a groove for placing an eddy current array detection host 5, a modular display 6, a high-temperature weld scanner 7 and a high-temperature pen scanner 8 is provided on the upper surface of the inner liner 4:

[0035] The eddy current array detection host 5 is connected to the modular display 6 circuit through a data cable. Two probe interfaces are provided at the front end of the eddy current array detection host 5. The probe interfaces are connected to the high-temperature weld scanner 7 or the high-temperature pen scanner 8 with the wires. The eddy current array detection host 5 is provided with the high-temperature weld scanner 7 and the high-temperature pen scanner 8 to quickly detect the cracks in the small corner welds of the branch pipe platform. The eddy current array technology is mainly used to quickly detect without pre-treatment of the detection pad. The eddy current array can quickly complete the detection on the outer surface of the inspected workpiece and can detect crack defects at 6mm on the surface and inside. The temperature can be detected online without stopping at 240℃. The cracks can be quantified by calibrating the calibration block. The detection speed can reach 300mm per second. The detection efficiency is high, the sensitivity is high, and the penetration ability is strong. The detection results can be intuitively displayed and recorded through the modular display 6. Compared with conventional detection methods, it can be completed at least a few days earlier, which improves the efficiency of the detection personnel and saves time and economic losses for the owners. The coil arrangement of the eddy current array can refer to Fig.12 and Fig.13 .

[0036] A protective frame 9 is provided on the outside of the modular display 6 and the eddy current array detection host 5. The four corners of the protective frame 9 located on the outside of the modular display 6 are integrally formed with wear-resistant corner guards 10, and the wear-resistant corner guards 10 are fixed to the polyurethane sheath 11 by screws. The polyurethane sheath 11 is sleeved on the outside of the modular display 6. By setting the protective frame 9, the outer shell of the modular display 6 and the eddy current array detection host 5 are protected to prevent damage caused by bumps. In addition, since the modular display itself is relatively fragile, a polyurethane sheath 11 is sleeved on the basis of its protective frame 9. The modular display 6 will be further protected by the buffering characteristics of the polyurethane sheath 11, that is, when the side of the modular display 6 is impacted, it will be protected by the polyurethane sheath 11.

[0037] An upper loading plate 12 is fixed to the top of the eddy current array detection host 5, and limiting ring buckles 13 are fixed on the front and rear sides of the top of the upper loading plate 12, and the pressing end of the limiting ring buckle 13 is provided with a screw thread 15 for tightening the threaded sleeve 14, the threaded sleeve 14 is sleeved on the other end of the limiting ring buckle 13, and a resistance block 16 is fixed to the other end of the limiting ring buckle 13. Considering that workers need to carry equipment for inspection when inspecting the welds of small pipes on branch platforms, the eddy current array detection host 5 can be installed at this time. Pass through the belt of the worker's work clothes through the limiting ring buckle 13 and then tighten the threaded sleeve 14. At this time, the eddy current array detection host 5 is fixed on the user for easy carrying.

[0038] A download plate 17 is fixed to the bottom of the eddy current array detection host 5 by screws. The outer contour of the download plate 17 is a T-shaped structure, and a positioning box 18 is clamped on the outside of the download plate 17. Both ends of the positioning box 18 are provided with movable holes for the hook 19 to stretch. A guide column 20 that is compatible with the guide groove in the middle of the hook 19 is fixed inside each movable hole, and the two hooks 19 are connected by a tension spring 21. The eddy current array detection host 5 can also be hooked and fixed on a table or a plate-like fixed object through the positioning box 18. At this time, the weight of the carrying equipment will be reduced, the hook 19 will be stretched, and then the hook 19 will be clamped out of the plate-like fixed object or the table, and the hook 19 will be released. At this time, the tension spring 21 contracts to complete the fixing process.

[0039] A plurality of shock absorbers 22 are evenly spaced at the bottom of the bottom shell 1, and the load-bearing end of the shock absorber 22 is fixed to the bottom of the inner tank 4. A plurality of connecting blocks 23 are also fixed to the bottom of the bottom shell 1, and the upper end of each connecting block 23 is threadedly connected to a contact head 24, and a rubber conical head 25 is fixed to the top of each contact head 24. Since the detection instrument is very precise and needs to be integrated during transportation to avoid being affected by vibration, the device will use the plurality of shock absorbers 22 inside the bottom shell 1 in conjunction with the rubber conical head 25 to buffer the vibration during transportation.

[0040] A cavity is provided at the lower end of the top cover 2 for the movement of the contact plate 26, and guide rails 27 adapted to the side slide grooves of the contact plate 26 are integrally formed on both sides of the cavity. A sponge block 28 that contacts the upper surface of the inner liner 4 is fixed to the lower surface of the contact plate 26, and a film-coated pressure sensor 29 is installed between the sponge block 28 and the contact plate 26. The film-coated pressure sensor 29 is connected to the controller 30 circuit on the side of the top cover 2. The contact plate 26 cooperates with the sponge block 28 to fix multiple instruments in the middle of the groove of the inner liner 4, preventing the instruments from colliding with each other inside the inner liner 4 and causing wounds. After the instrument is placed in the groove, the downwardly pressed contact plate 26 cooperates with the sponge block 28 to limit the instrument in the groove, and in order to avoid excessive pressure, the pressure of the contact plate 26 is detected by the film-coated pressure sensor 29.

[0041] The contact plate 26 and the opposite surface of the cavity are fixed to the upper and lower ends of the telescopic airbag 32 by Velcro 31. The front end of the telescopic airbag 32 is connected to the air injection pipe through the air nozzle, and the air injection pipe passes through the cavity and extends to the inside of the installation cavity to communicate with a small dual-purpose air pump 33. The other end of the small dual-purpose air pump 33 passes through the side of the installation cavity and extends to one side of the top cover 2. By setting up the small dual-purpose air pump 33, the telescopic airbag 32 is injected and exhausted. When the telescopic airbag 32 is injected with air, it expands. At this time, the contact plate 26 moves longitudinally along the guide rail 27 to complete the process of the contact plate 26 driving the sponge block 28 to press down and contact the inner liner 4. On the contrary, when exhausting, the sponge block 28 is away from the surface of the inner liner 4.

[0042] A multifunctional cavity for placing a backup battery 34 is also provided inside the top cover 2. The backup battery 34 is connected to the solar photovoltaic panel 35 circuit on the top surface of the top cover 2 through a wire, and the backup battery 34 is also connected to the inverter 36. The inverter 36 is connected to the power replenishment interface 37 circuit on the side of the top cover 2 through a wire. The front end of the power replenishment interface 37 is covered with a silicone plug 38. The backup battery 34 is connected to the controller 30 circuit through a wire. Considering that the device needs to be used outdoors, when the equipment runs out of power, the backup battery 34 will be used to replenish the instrument, and the backup battery 34 can be replenished by the solar photovoltaic panel 35.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms, comprising an eddy current array detection host (5) and a multifunctional instrument box, characterized in that: The multifunctional instrument box comprises a bottom shell (1) and a top cover (2), wherein the bottom shell (1) and the top cover (2) are hingedly connected via a hinge (3), an inner shell (4) is provided in the middle of the bottom shell (1), and a groove is provided on the upper surface of the inner shell (4) for placing an eddy current array detection host (5), a modular display (6), a high-temperature weld scanner (7) and a high-temperature pen scanner (8): The eddy current array detection host (5) is connected to the modular display (6) circuit via a data line. Two probe interfaces are provided at the front end of the eddy current array detection host (5). The probe interfaces are connected to a high-temperature weld scanner (7) or a high-temperature pen scanner (8) via wires.

2. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch platforms according to claim 1 is characterized in that: The modular display (6) and the eddy current array detection host (5) are both provided with a protective frame (9) on the outside, and the four corners of the protective frame (9) located on the outside of the modular display (6) are all integrally formed with wear-resistant corner guards (10), and the wear-resistant corner guards (10) are fixed to a polyurethane sheath (11) by screws, and the polyurethane sheath (11) is sleeved on the outside of the modular display (6).

3. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms according to claim 1 is characterized in that: An upper loading plate (12) is fixed on the top of the eddy current array detection host (5), and limiting ring buckles (13) are fixed on the front and rear sides of the top of the upper loading plate (12), and the pressing end of the limiting ring buckle (13) is provided with a screw thread (15) for tightening a threaded sleeve (14), the threaded sleeve (14) is sleeved on the other end of the limiting ring buckle (13), and a resistance block (16) is fixed on the other end of the limiting ring buckle (13).

4. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch platforms according to claim 1 is characterized in that: A download plate (17) is fixed to the bottom of the eddy current array detection host (5) by screws, the outer contour of the download plate (17) is a T-shaped structure, and a positioning box (18) is clamped on the outside of the download plate (17), and movable holes for the hook claw (19) to stretch are opened at both ends of the positioning box (18), and a guide column (20) adapted to the guide groove in the middle of the hook claw (19) is fixed inside each movable hole, and the two hook claws (19) are connected by a tension spring (21).

5. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch platforms according to claim 1 is characterized in that: A plurality of shock absorbers (22) are evenly spaced at the bottom of the bottom shell (1), and a load-bearing end of the shock absorber (22) is fixed to the bottom of the inner liner (4). A plurality of connecting blocks (23) are also fixed to the bottom of the bottom shell (1), and the upper end of each connecting block (23) is threadedly connected to a contact head (24), and the top of each contact head (24) is fixed to a rubber cone head (25).

6. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms according to claim 1 is characterized in that: The lower end of the top cover (2) is provided with a cavity for the movement of the contact plate (26), and guide rails (27) adapted to the side sliding grooves of the contact plate (26) are integrally formed on both sides of the cavity; a sponge block (28) for contacting the upper surface of the inner liner (4) is fixed to the lower surface of the contact plate (26); a film-coated pressure sensor (29) is installed between the sponge block (28) and the contact plate (26), and the film-coated pressure sensor (29) is connected to a controller (30) circuit on the side of the top cover (2).

7. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch pipe platforms according to claim 6 is characterized in that: The contact plate (26) and the surface opposite to the cavity are fixed to the upper and lower ends of the telescopic airbag (32) through Velcro (31); the front end of the telescopic airbag (32) is connected to the air injection pipe through the air nozzle, and the air injection pipe passes through the cavity and extends to the inside of the installation cavity to communicate with the small dual-purpose air pump (33); the other end of the small dual-purpose air pump (33) passes through the side of the installation cavity and extends to one side of the top cover (2).

8. The array eddy current detection device for detecting cracks in small pipe fillet welds of branch platforms according to claim 1 is characterized in that: The top cover (2) is also provided with a multifunctional cavity for placing a backup battery (34). The backup battery (34) is connected to the solar photovoltaic panel (35) circuit on the top surface of the top cover (2) through a wire, and the backup battery (34) is also connected to an inverter (36). The inverter (36) is connected to the power supply interface (37) circuit on the side of the top cover (2) through a wire. The front end of the power supply interface (37) is covered with a silicone plug (38). The backup battery (34) is connected to the controller (30) circuit through a wire.

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