Eddy current array imaging system for small connecting pipe fillet weld crack detection

Abstract

The eddy current array imaging system comprises a detector main body, the top of the detector main body is provided with a plurality of connecting female heads, a wire is inserted into an inner cavity of the connecting female head located on one side, a detection pen tube is fixedly installed at the bottom end of the wire, the inner cavity of the detection pen tube is provided with the connecting female heads, and the connecting female heads are arranged in the inner cavity of the detection pen tube. After the small connecting pipe is detected, under the cooperative use of the protection assembly, the suspension plate can move upwards under the cooperative use of the telescopic rod and the telescopic spring, then the detection head can be stored in the inner cavity of the detection pen tube, the detection head can be protected, and the service life of the detection head can be prolonged; a rotating gear can rotate under the transmission of a fixed rack plate, and can rotate under the transmission of a fixed shaft, a driving bevel gear and a driven bevel gear, so that a shielding round block fixedly arranged on the periphery of a T-shaped rod in a sleeving manner can be positioned at the bottom of a detection pen tube, and external foreign matters can be prevented from entering the detection pen tube when the detection pen tube is not used.

Description

Technical Field

[0001] The invention relates to the technical field of weld detection equipment, in particular to an eddy current array imaging system for detecting cracks in small pipe fillet welds. Background Art

[0002] During the welding process of pressure vessels and pipelines, various cracks will appear due to different steel types and welding structure types. The morphology and distribution characteristics of the cracks are very complex, including surface cracks and internal cracks in the weld, transverse cracks and longitudinal cracks in the heat-affected zone, deep cracks under the weld and weld bead, and arc pit cracks appearing in the arc pit; since the welds of pressure vessels and pipelines and their surrounding areas are places where stress concentration is extremely likely to occur, they are also places where accidents are particularly prone to occur.

[0003] When detecting circumferential welding cracks at small pipe connections, a detection head and an eddy current array detector are generally used to detect the welding cracks of small pipes. However, after the detection head is completed and works, the detection head is still exposed to the outside and is easily damaged by external factors, which reduces the service life of the detection pen.

[0004] To solve the above problems, an eddy current array imaging system for small pipe fillet weld crack detection was proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an eddy current array imaging system for detecting cracks in small pipe fillet welds. The device is used to work, thereby solving the problems in the above background.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an eddy current array imaging system for detecting cracks in fillet welds of small pipes, comprising a detector body, a plurality of female connectors are installed on the top of the detector body, a wire is plugged into the inner cavity of the female connector on one side, a detection pen tube is fixedly installed at the bottom end of the wire, a female connector is provided in the inner cavity of the detection pen tube, a wire harness assembly is provided on the top of the detector body, a protective assembly is provided near the bottom of the inner cavity of the detection pen tube, and a cleaning assembly is provided near the bottom of the inner cavity of the detector body;

[0007] The protective component includes a pressing block located near the bottom on one side of the detection pen tube and a cross bar fixedly installed on the other side of the pressing block near the top and bottom. The other end of the cross bar movably penetrates the inner cavity of the detection pen tube and is fixedly installed with a trapezoidal block. A driving convex rod is provided at the bottom of the trapezoidal block near the other side. A hanging plate is fixedly installed at the bottom of the driving convex rod, and the bottom of the hanging plate is fixedly connected to the detection head.

[0008] Furthermore, a return spring is movably sleeved on the outer circumference of the cross bar near the other end, and the two ends of the return spring are respectively fixedly connected to one side of the inner cavity of the detection pen tube and the trapezoidal block.

[0009] Furthermore, telescopic rods are fixedly installed on the top of the suspension plate near the front and rear sides, and the top ends of the telescopic rods are fixedly connected to the fixed round block. The outer periphery of the telescopic rods is movably sleeved with telescopic springs, and the two ends of the telescopic springs are respectively fixedly connected to the fixed round block and the suspension plate.

[0010] Furthermore, a fixed rack plate is fixedly installed near one side of the bottom of the hanging plate, a rotating gear is meshed on one side of the fixed rack plate, a fixed shaft is fixedly installed at the center of the front side of the rotating gear, and a rectangular opening is opened on one side of the detection pen tube, and the front end of the fixed shaft is rotatably connected to the inner cavity of the rectangular opening, an active bevel gear is fixedly sleeved on the outer periphery of the fixed shaft, and a driven bevel gear is meshed on the bottom of the active bevel gear, and a T-shaped rod is fixedly installed at the center of the bottom of the driven bevel gear, and the bottom end of the T-shaped rod movably passes through the inner cavity of the detection pen tube and extends to the bottom of the detection pen tube, and a blocking round block is fixedly sleeved on the outer periphery of the T-shaped rod near the bottom end.

[0011] Furthermore, the wiring harness assembly includes support blocks fixedly installed on the top of the detector body near both sides and a worm movably passing through adjacent support blocks, the other end of the worm is rotatably connected to the adjacent worm wheel, one end of the worm is fixedly installed with a knob, a plurality of worm wheels are meshed on the rear side of the worm, and the worm wheels are rotatably connected to the outer periphery of the connecting female head, arc-shaped openings are opened on the top of the worm wheel near the front and rear sides, a driving rod is movably passed through the inner cavity of the arc-shaped opening, and a limit block is fixedly installed on the top of the driving rod.

[0012] Furthermore, a sliding block is fixedly installed at the bottom of the driving rod, and the bottom of the sliding block is slidably connected to the top of the detector body.

[0013] Furthermore, the cleaning assembly includes a transmission rack plate meshed with one side of the rotating gear and a rectangular block fixedly installed on the top of the transmission rack plate, a fixed groove is fixedly installed on one side of the detection pen tube, and one side of the transmission rack plate is slidably connected to the inner cavity of the fixed groove, and an air bag is fixedly installed on the top of the rectangular block, the top of the air bag is fixedly connected to the top of the inner cavity of the fixed groove, and an air blowing tube is fixedly installed on the bottom of the detection pen tube.

[0014] Furthermore, an air inlet pipe is plugged into the other side of the airbag near the top, and an exhaust pipe is plugged into the other side of the airbag, and the bottom end of the exhaust pipe is fixedly connected to the air blowing pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When limiting the male connector of the wire, the limit block can be moved to the opposite side with the cooperation of the wire harness assembly, so as to limit the male connector of the wire and prevent the wire from accidentally falling off from the inner cavity of the female connector during detection, thereby affecting the effect of subsequent detection by the detection head.

[0017] 2. After the inspection of the small pipe is completed, with the cooperation of the protective component, the telescopic rod and the telescopic spring can be used to move the suspension plate upward, and then the detection head can be stored in the inner cavity of the detection pen tube, which can protect the detection head and extend its service life.

[0018] 3. When the detection head is stored, the rotating gear can be rotated under the transmission of the fixed rack plate, and can be rotated under the transmission of the fixed shaft, the active bevel gear and the driven bevel gear, so that the shielding circle fixed on the outer periphery of the T-shaped rod can be located at the bottom of the detection pen tube, which can prevent foreign objects from entering when not in use.

[0019] 4. When the detection head extends out of the inner cavity of the detection pen tube, the rectangular block can be moved upward to squeeze the airbag with the cooperation of the cleaning component, and then the gas can be passed through the exhaust pipe into the inner cavity of the blowing tube, which is convenient for cleaning impurities on the surface of the detection head and utilizing the effect of subsequent detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0021] Figure 2 It is another perspective three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the local detection pen tube of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed round block and the protective assembly of the present invention;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the detection head, the air blowing tube and the driving convex rod of the present invention;

[0025] Figure 6 For the present invention Figure 2 Enlarged view of point A in the middle;

[0026] Figure 7 For the present invention Figure 4 Enlarged view of point B in the middle;

[0027] Figure 8 For the present invention Figure 4 Enlarged view of center C.

[0028] In the figure: 1. detector body; 2. wire; 3. detection pen tube; 4. connecting female head; 5. detection head; 6. wire harness assembly; 61. support block; 62. worm; 63. worm gear; 64. arc mouth; 65. drive rod; 651. sliding block; 66. limit block; 7. protection assembly; 71. pressing block; 72. cross bar; 721. reset spring; 73. trapezoidal block; 74. drive convex rod; 75. suspension plate; 751. Fixed rack plate; 752, rotating gear; 753, fixed shaft; 754, active bevel gear; 755, driven bevel gear; 756, T-shaped rod; 757, shielding round block; 758, telescopic rod; 759, telescopic spring; 8, cleaning component; 81, transmission rack plate; 82, rectangular block; 83, air bag; 831, intake pipe; 832, exhaust pipe; 84, fixed groove; 85, blowing pipe; 9, fixed round block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] The purpose of this embodiment is to provide an eddy current array imaging system for crack detection of small pipe fillet welds, including a detector body 1, a plurality of connecting female heads 4 are installed on the top of the detector body 1, a wire 2 is inserted into the inner cavity of the connecting female head 4 on one side, a male head is installed on the wire 2, the connecting female head 4 is adapted to the male head on the wire 2, a detection pen tube 3 is fixedly installed at the bottom end of the wire 2, the inner cavity of the detection pen tube 3 is provided with a connecting female head 4, a wire harness component 6 is provided on the top of the detector body 1, a protective component 7 is provided near the bottom of the inner cavity of the detection pen tube 3, and a cleaning component 8 is provided near the bottom of the inner cavity of the detector body 1;

[0032] The protective component 7 includes a pressing block 71 located near the bottom on one side of the detection pen tube 3 and a cross bar 72 fixedly installed on the other side of the pressing block 71 near the top and bottom. The other end of the cross bar 72 movably penetrates the inner cavity of the detection pen tube 3 and is fixedly installed with a trapezoidal block 73. A driving protrusion 74 is provided at the bottom of the trapezoidal block 73 near the other side. A hanging plate 75 is fixedly installed at the bottom of the driving protrusion 74, and the bottom of the hanging plate 75 is fixedly connected to the detection head 5.

[0033] Specifically, after the inspection of the small pipe is completed, with the cooperation of the protective component 7, the suspension plate 75 can be moved upward with the cooperation of the telescopic rod 758 and the telescopic spring 759, and then the detection head 5 can be stored in the inner cavity of the detection pen tube 3, so as to protect the detection head 5 and extend its service life.

[0034] A return spring 721 is movably sleeved on the outer circumference of the cross bar 72 near the other end, and the two ends of the return spring 721 are fixedly connected to one side of the inner cavity of the detection pen tube 3 and the trapezoidal block 73 respectively.

[0035] Specifically, the pressing block 71 can be reset by providing a reset spring 721 .

[0036] Telescopic rods 758 are fixedly installed on the top of the suspension plate 75 near the front and rear sides, and the top ends of the telescopic rods 758 are fixedly connected to the fixed round block 9. Telescopic springs 759 are movably sleeved on the outer periphery of the telescopic rods 758, and the two ends of the telescopic springs 759 are fixedly connected to the fixed round block 9 and the suspension plate 75 respectively.

[0037] Specifically, the fixed round block 9 can be moved upward by providing the telescopic rod 758 and the telescopic spring 759 .

[0038] A fixed rack plate 751 is fixedly installed near one side of the bottom of the hanging plate 75, and a rotating gear 752 is meshed on one side of the fixed rack plate 751. A fixed shaft 753 is fixedly installed at the center of the front side of the rotating gear 752, and a rectangular opening is opened on one side of the detection pen tube 3, and the front end of the fixed shaft 753 is rotatably connected in the inner cavity of the rectangular opening, and an active bevel gear 754 is fixedly sleeved on the outer periphery of the fixed shaft 753, and a driven bevel gear 755 is meshed at the bottom of the active bevel gear 754, and a T-shaped rod 756 is fixedly installed at the center of the bottom of the driven bevel gear 755, and the bottom end of the T-shaped rod 756 movably passes through the inner cavity of the detection pen tube 3 and extends to the bottom of the detection pen tube 3, and a shielding round block 757 is fixedly sleeved on the outer periphery of the T-shaped rod 756 near the bottom end.

[0039] Specifically, when the hanging plate 75 moves downward, the rotating gear 752 can be rotated by the fixed rack plate 751 fixed on the hanging plate 75, and then the fixed shaft 753 can be rotated. Under the transmission of the active bevel gear 754 and the driven bevel gear 755, the T-shaped rod 756 can be rotated, and then the blocking circle 757 can be opened. When the hanging plate 75 moves upward, the blocking circle 757 can block the bottom of the detection pen tube 3, thereby preventing foreign matter from entering and damaging the detection head 5.

[0040] The wiring harness assembly 6 includes a support block 61 fixedly installed on the top of the detector body 1 near both sides and a worm 62 movably passing through the adjacent support block 61. The other end of the worm 62 is rotatably connected to the adjacent worm wheel 63. A knob is fixedly installed on one end of the worm 62. A plurality of worm wheels 63 are meshed on the rear side of the worm 62, and the worm wheel 63 is rotatably connected to the outer periphery of the connecting female head 4. An arc-shaped opening 64 is opened at the top of the worm wheel 63 near the front and rear sides. A driving rod 65 movably passes through the inner cavity of the arc-shaped opening 64, and a limit block 66 is fixedly installed on the top of the driving rod 65.

[0041] Specifically, when limiting the male head of the wire 2, the limit block 66 can be moved to the opposite side with the cooperation of the wiring harness assembly 6, so as to limit the male plug of the wire 2 and prevent the wire 2 from accidentally falling off from the inner cavity of the connecting female head 4 during detection, thereby affecting the effect of subsequent detection by the detection head 5.

[0042] The bottom of the driving rod 65 is fixedly mounted with a sliding block 651 , and the bottom of the sliding block 651 is slidably connected to the top of the detector body 1 .

[0043] Specifically, the sliding block 651 can be provided to limit the movement of the driving rod 65 .

[0044] The cleaning assembly 8 includes a transmission rack plate 81 meshed with one side of the rotating gear 752 and a rectangular block 82 fixedly installed on the top of the transmission rack plate 81, a fixed groove 84 is fixedly installed on one side of the detection pen tube 3, and one side of the transmission rack plate 81 is slidably connected to the inner cavity of the fixed groove 84, and an air bag 83 is fixedly installed on the top of the rectangular block 82, and the top of the air bag 83 is fixedly connected to the top of the inner cavity of the fixed groove 84, and an air blow pipe 85 is fixedly installed on the bottom of the detection pen tube 3.

[0045] Specifically, when the detection head 5 extends out of the inner cavity of the detection pen tube 3, the rectangular block 82 can be moved upward to squeeze the airbag 83 with the cooperation of the cleaning component 8, and then the gas can be passed through the inner cavity of the blowing tube 85 through the exhaust pipe 832, so as to clean the impurities on the surface of the detection head 5 and utilize the effect of subsequent detection.

[0046] An air inlet pipe 831 is connected to the other side of the airbag 83 near the top, and a one-way valve is provided on the air inlet pipe 831. An exhaust pipe 832 is connected to the other side of the airbag 83, and a one-way valve is provided on the exhaust pipe 832. The bottom end of the exhaust pipe 832 is fixedly connected to the air blowing pipe 85.

[0047] To sum up, the working principle of the present invention is as follows: when it is necessary to inspect the weld of a small pipe, the detector body 1 is started, the wire 2 is connected to the connecting female head 4, and the knob is rotated to rotate the worm 62 fixed on the knob, thereby rotating the worm gear 63 engaged therewith, and with the use of the arc-shaped mouth 64, the driving rod 65 can be moved to the opposite side under the limit of the sliding block 651, and moved to the opposite side, so that the male plug of the wire 2 can be limited, so that the limit block 66 can be made. After that, the staff can hold the inspection pen tube 3 and press the pressing block 71 with their fingers. The pressing block 71 can move the trapezoidal block 73 to the other side through the cross bar 72, and then the hanging plate 75 can be moved downward by driving the convex rod 74, so that the inspection head 5 can be extended to inspect the small pipe. When the inspection is completed, the pressing block 71 is released to enable the telescopic rod 758 and the telescopic spring 759 to move. When used in conjunction with the detection head 5, the detection head 5 can be extended into the inner cavity of the detection pen tube 3 to protect it. When the hanging plate 75 moves downward, the rotating gear 752 can be rotated by the fixed rack plate 751 fixed on the hanging plate 75, and then the fixed shaft 753 can be rotated. Under the transmission of the active bevel gear 754 and the driven bevel gear 755, the T-shaped rod 756 can be rotated, and then the shielding round block 757 can be opened. When the hanging plate 75 moves upward, the shielding round block 757 can shield the bottom of the detection pen tube 3, and foreign matter can be prevented from entering and damaging the detection head 5. When the detection head 5 extends out of the inner cavity of the detection pen tube 3, with the cooperation of the cleaning component 8, the rectangular block 82 can be moved upward to squeeze the airbag 83, and then the gas can be passed into the inner cavity of the blowing tube 85 through the exhaust pipe 832, so as to facilitate the cleaning of impurities on the surface of the detection head 5 and facilitate the effect of subsequent detection.

[0048] The above shows and describes 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An eddy current array imaging system for detecting cracks in small pipe fillet welds, comprising a detector body (1), characterized in that: A plurality of female connectors (4) are installed on the top of the detector body (1); a wire (2) is inserted into the inner cavity of the female connector (4) on one side; a detection pen tube (3) is fixedly installed at the bottom end of the wire (2); the inner cavity of the detection pen tube (3) is provided with the female connector (4); a wiring harness component (6) is installed on the top of the detector body (1); a protective component (7) is installed near the bottom of the inner cavity of the detection pen tube (3); and a cleaning component (8) is installed near the bottom of the inner cavity of the detector body (1); the protective component ( 7) comprises a pressing block (71) located near the bottom of one side of the detection pen tube (3) and a cross bar (72) fixedly installed on the other side of the pressing block (71) near the top and bottom, the other end of the cross bar (72) movably penetrates the inner cavity of the detection pen tube (3) and is fixedly installed with a trapezoidal block (73), a driving protrusion (74) is provided at the bottom of the trapezoidal block (73) near the other side, a hanging plate (75) is fixedly installed at the bottom of the driving protrusion (74), and the bottom of the hanging plate (75) is fixedly connected to the detection head (5).

2. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 1, characterized in that: A return spring (721) is movably sleeved on the outer circumference of the cross bar (72) near the other end, and the two ends of the return spring (721) are respectively fixedly connected to one side of the inner cavity of the detection pen tube (3) and the trapezoidal block (73).

3. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 1, characterized in that: A telescopic rod (758) is fixedly installed on the top of the hanging plate (75) near the front and rear sides, and the top end of the telescopic rod (758) is fixedly connected to the fixed round block (9). A telescopic spring (759) is movably sleeved on the outer periphery of the telescopic rod (758), and the two ends of the telescopic spring (759) are respectively fixedly connected to the fixed round block (9) and the hanging plate (75).

4. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 1, characterized in that: A fixed rack plate (751) is fixedly installed near one side of the bottom of the hanging plate (75), a rotating gear (752) is meshed on one side of the fixed rack plate (751), a fixed shaft (753) is fixedly installed at the center of the front side of the rotating gear (752), a rectangular opening is opened on one side of the detection pen tube (3), and the front end of the fixed shaft (753) is rotatably connected in the inner cavity of the rectangular opening, an active bevel gear (754) is fixedly sleeved on the outer periphery of the fixed shaft (753), a driven bevel gear (755) is meshed on the bottom of the active bevel gear (754), a T-shaped rod (756) is fixedly installed at the center of the bottom of the driven bevel gear (755), and the bottom end of the T-shaped rod (756) movably penetrates the inner cavity of the detection pen tube (3) and extends to the bottom of the detection pen tube (3), and a shielding round block (757) is fixedly sleeved on the outer periphery of the T-shaped rod (756) near the bottom end.

5. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 1, characterized in that: The harness assembly (6) comprises a support block (61) fixedly mounted on the top of the detector body (1) near both sides and a worm (62) movably passing through the adjacent support block (61); the other end of the worm (62) is rotatably connected to the adjacent worm wheel (63); a knob is fixedly mounted on one end of the worm (62); a plurality of worm wheels (63) are meshed on the rear side of the worm (62); and the worm wheel (63) is rotatably connected to the outer periphery of the connecting female head (4); an arc-shaped opening (64) is provided on the top of the worm wheel (63) near the front and rear sides; a driving rod (65) is movably passed through the inner cavity of the arc-shaped opening (64); and a limit block (66) is fixedly mounted on the top of the driving rod (65).

6. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 5, characterized in that: The bottom of the driving rod (65) is fixedly mounted with a sliding block (651), and the bottom of the sliding block (651) is slidably connected to the top of the detector body (1).

7. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 1, characterized in that: The cleaning assembly (8) comprises a transmission rack plate (81) meshed with one side of the rotating gear (752) and a rectangular block (82) fixedly mounted on the top of the transmission rack plate (81); a fixed groove (84) is fixedly mounted on one side of the detection pen tube (3); one side of the transmission rack plate (81) is slidably connected to the inner cavity of the fixed groove (84); an air bag (83) is fixedly mounted on the top of the rectangular block (82); the top of the air bag (83) is fixedly connected to the top of the inner cavity of the fixed groove (84); and an air blowing pipe (85) is fixedly mounted on the bottom of the detection pen tube (3).

8. The eddy current array imaging system for detecting cracks in small pipe fillet welds according to claim 7, characterized in that: An air inlet pipe (831) is plugged into the other side of the air bag (83) near the top, and an exhaust pipe (832) is plugged into the other side of the air bag (83), and the bottom end of the exhaust pipe (832) is fixedly connected to the air blowing pipe (85).

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