Efficient outer finned tube eddy current magnetic flux leakage double-flaw detection equipment

Abstract

The utility model discloses efficient eddy current magnetic flux leakage double-flaw detection equipment for an outer finned tube. The equipment comprises a rack, a flaw detection device, a feeding device and a sorting and discharging device, the rack is provided with a conveying channel used for conveying outer finned tubes from front to back. The flaw detection device comprises a magnetizing coil, a probe coil and a demagnetizing coil, and the outer finned tube can sequentially penetrate through the magnetizing coil, the probe coil and the demagnetizing coil; the feeding device is arranged on the rack and close to the front end of the conveying channel, and the feeding device is used for feeding outer finned tubes to the front end of the conveying channel; the sorting and discharging device is arranged at the position, close to the rear end of the conveying channel, of the rack and used for discharging the outer finned tubes to the rear end of the conveying channel. The magnetizing coil can magnetize and amplify cutter and core head residues mingled in the outer finned tube, so that the probe coil can conveniently detect the cutter and the core head mingled in the outer finned tube, the accuracy of flaw detection is improved, and the quality and the service life of the outer finned tube are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of nondestructive testing, in particular to an efficient eddy current and magnetic flux leakage double flaw detection device for external finned tubes. Background Art

[0002] An eddy current flaw detector uses the interaction between an alternating magnetic field and eddy currents to detect defects such as defects and cracks on the surface or near the surface of a conductor material. In order to improve the heat transfer efficiency, an efficient external finned tube usually processes three-dimensional fins on the inner and outer surfaces of the base smooth tube to increase the inner and outer surface areas of the heat exchange tube. Since spiral groove marks will be formed on the product surface after the external fins are processed, and with the differences in the surface fin opening, it will increase the false alarm and missed alarm ratios of the eddy current flaw detector. The processing of the external finned tube is formed by rolling and extrusion of a tool group, so tool cracking or liner core head cracking and embedding inside the product are very likely to occur during the processing. During eddy current detection, affected by the fin shape of the external fins, it is not easy to detect the cracked blades or liner core heads, which affects the service life of the external finned tube. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an efficient eddy current and magnetic flux leakage double flaw detection device for external finned tubes, which can improve the flaw detection efficiency and accuracy, and ensure the quality and service life of the external finned tubes.

[0004] An efficient eddy current and magnetic flux leakage double flaw detection device for external finned tubes according to an embodiment of the utility model includes a frame, a flaw detection device, a feeding device, and a sorting and discharging device. A conveying channel is provided on the frame, and the conveying channel is used to convey the external finned tubes from front to back; the flaw detection device includes a fixed seat, and a magnetization coil, a probe coil, and a demagnetization coil are sequentially wound around the fixed seat from front to back. The fixed seat is correspondingly arranged in the middle section of the conveying channel so that the external finned tubes can sequentially pass through the magnetization coil, the probe coil, and the demagnetization coil. The magnetization coil, the probe coil, and the demagnetization coil are all electrically connected to the same main machine, and the main machine has a software analysis module. The probe coil is used to collect eddy current signals and magnetic flux leakage signals and transmit the eddy current signals and the magnetic flux leakage signals to the software analysis module; the feeding device is arranged on the frame and near the front end of the conveying channel, and the feeding device is used to feed the external finned tubes to the front end of the conveying channel; the sorting and discharging device is arranged on the frame at a position near the rear end of the conveying channel, and the sorting and discharging device is used to discharge the external finned tubes from the rear end of the conveying channel.

[0005] It has at least the following beneficial effects:

[0006] The magnetizing coil can amplify the residual magnetization of the tool and core head mixed inside the external fin tube, making it easier for the probe coil to detect the tool and core head mixed inside the external fin tube, improving the accuracy of flaw detection and ensuring the quality and service life of the external fin tube. The flaw detection device detects and distinguishes whether the external fin tube is qualified or unqualified, and then the demagnetization coil demagnetizes the magnetism of the external fin tube and the tool and core head mixed inside it. The feeding device replaces the manual feeding of the external fin tubes one by one, and the sorting and unloading device replaces the manual unloading of the external fin tubes one by one. The external fin tube can quickly pass through the flaw detection device and complete magnetization, flaw detection and demagnetization, effectively improving the working efficiency of the external fin tube eddy current leakage magnetic double flaw detection equipment.

[0007] According to some embodiments of the utility model, the conveying path includes a rotary drive mechanism and a plurality of rollers distributed along the front-to-back direction, the axial direction of the rollers is the left-to-right direction, the middle section of the rollers is provided with grooves for limiting the external finned tubes, the output end of the rotary drive mechanism is transmission-connected to all the rollers, and the rotary drive mechanism drives all the rollers to rotate so as to convey the external finned tubes from front to back.

[0008] According to some embodiments of the utility model, a pressing device is further included, wherein the pressing device includes two groups of pressing rollers arranged at the front and rear of the fixing seat, and the pressing rollers are used to press the outer fin tube down onto the supporting roller.

[0009] According to some embodiments of the utility model, the pressing device also includes a lifting drive mechanism, the output end of the lifting drive mechanism is connected to the pressure roller, and the lifting drive mechanism drives the pressure roller to rise and fall to press the outer fin tube down on the supporting roller.

[0010] According to some embodiments of the utility model, the loading device includes a first driving mechanism, a first rotating shaft and multiple support rods, the axial directions of the multiple support rods are all left and right and the heights are equal, the multiple support rods are distributed along the front-to-back direction to support each section of the external finned tube, one end of the support rod is tilted downward and toward the roller, the axial direction of the first rotating shaft is the front-to-back direction, a plurality of stop blocks are provided on the first rotating shaft, the output end of the first driving mechanism is transmission-connected to the first rotating shaft, the first driving mechanism drives the first rotating shaft and the plurality of stop blocks to rotate, and the stop block rotates to above one end of the support rod so that the stop block blocks the external finned tube on the support rod from falling onto the roller.

[0011] According to some embodiments of the present utility model, the feeding device further includes a first support frame, the first rotating shaft is rotatably arranged on the first support frame or the frame, the first driving mechanism includes a first linear driving mechanism and a connecting rod, the first linear driving mechanism is hinged to the first support frame or the frame, the output end of the first linear driving mechanism is hinged to one end of the connecting rod, and the other end of the connecting rod is connected to the first rotating shaft.

[0012] According to some embodiments of the present utility model, the sorting and discharging device includes a second driving mechanism, a second rotating shaft, and multiple turning rods. The axial direction of the second rotating shaft is the front-rear direction. Multiple turning rods are all provided with hook parts. Multiple turning rods are distributed along the front-rear direction on the second rotating shaft. The output end of the second driving mechanism is in transmission connection with the second rotating shaft. The second driving mechanism drives the second rotating shaft / the turning rods to rotate. The hook parts of multiple turning rods swing upward from below the roller to lift the external finned tube on the roller.

[0013] According to some embodiments of the present utility model, the sorting and discharging device further includes a second support frame, a third driving mechanism, a third rotating shaft, and multiple sorting rods. A qualified product bin and a non-qualified product bin are provided on the second support frame. The roller, the non-qualified product bin, and the qualified product bin are arranged in sequence from right to left. The third rotating shaft is rotatably arranged on the second support frame. Multiple sorting rods are distributed along the front-rear direction on the third rotating shaft. The third driving mechanism is in transmission connection with the third rotating shaft or multiple sorting rods. The third driving mechanism drives the third rotating shaft and multiple sorting rods to rotate. Multiple sorting rods are obliquely straddled across the opening of the non-qualified product bin to guide the external finned tube falling from the turning rod to roll into the qualified product bin.

[0014] According to some embodiments of the present utility model, the second driving mechanism is a second linear driving mechanism. The second linear driving mechanism is hinged to the frame or the second support frame. The output end of the second linear driving mechanism is hinged to the turning rod.

[0015] According to some embodiments of the present utility model, it further includes multiple straps. Multiple pulleys are provided on the left and right side walls of the opening of the qualified product bin along the front-rear direction. Multiple elastic members are provided on the left and right side walls of the opening of the qualified product bin along the front-rear direction. The pulleys are located above the elastic members. The two ends of the strap respectively bypass two pulleys distributed left and right and are respectively movably connected to two elastic members distributed left and right.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments, where:

[0018] Figure 1 It is a front view structural schematic diagram of an efficient external finned tube eddy current and magnetic flux leakage double flaw detection device according to an embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a partial enlarged schematic diagram at position A in

[0020] Figure 3 It is a structural schematic diagram of a flaw detection device in an efficient external finned tube eddy current and magnetic flux leakage double flaw detection device according to an embodiment of the present utility model;

[0021] Figure 4 It is a top view structural schematic diagram of an efficient external finned tube eddy current and magnetic flux leakage double flaw detection device according to an embodiment of the present utility model;

[0022] Figure 5 is Figure 4 a partial enlarged schematic diagram at position B in

[0023] Figure 6 It is a structural schematic diagram of a loading device in an efficient external finned tube eddy current and magnetic flux leakage double flaw detection device according to an embodiment of the present utility model;

[0024] Figure 7 It is a structural schematic diagram of a sorting and unloading device in an efficient external finned tube eddy current and magnetic flux leakage double flaw detection device according to an embodiment of the present utility model;

[0025] Figure 8 is the detection process of the flaw detection device;

[0026] Reference numerals in the drawings:

[0027] Frame 100; Conveyor track 110; Rotary drive mechanism 111; Roller 112; First stop bar 120; Pulley 130;

[0028] Flaw detection device 200; Fixed seat 210; Magnetizing coil 220; Probe coil 230; Demagnetizing coil 240;

[0029] Loading device 300; First drive mechanism 310; First linear drive mechanism 311; Connecting rod 312; First rotating shaft 320; Stop block 321; Support rod 330; First support frame 340;

[0030] Sorting and unloading device 400; Second drive mechanism 410; Second rotating shaft 420; Turning rod 430; Second support frame 440, Qualified product bin 441; Unqualified product bin 442: Third drive mechanism 450; Third rotating shaft 460; Sorting rod 470;

[0031] Groove 500;

[0032] Pressing device 600; Pressing roller 610; Lifting drive mechanism 620; Mounting bracket 621;

[0033] Strap 700;

[0034] Elastic member 800. Specific embodiments

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, "a plurality of" means two or more. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0039] Refer to Figures 1 to 5 , the present invention discloses an efficient eddy current and magnetic flux leakage double flaw detection device for external finned tubes, including a frame 100, a flaw detection device 200, a feeding device 300, and a sorting and discharging device 400.

[0040] A conveying channel 110 is provided on the frame 100, and the conveying channel 110 is used to convey the external finned tubes from front to back;

[0041] The flaw detection device 200 includes a fixed seat 210 and a magnetizing coil 220, a probe coil 230 and a demagnetizing coil 240 which are sequentially wound on the fixed seat 210 from front to back. The fixed seat 210 is correspondingly arranged in the middle section of the conveying path 110 so that the outer fin tube can sequentially pass through the magnetizing coil 220, the probe coil 230 and the demagnetizing coil 240. The magnetizing coil 220, the probe coil 230 and the demagnetizing coil 240 are all electrically connected to the same host. The host has a software analysis module. The probe coil 230 is used to collect eddy current signals and leakage magnetic signals and transmit the eddy current signals and leakage magnetic signals to the software analysis module.

[0042] The feeding device 300 is disposed on the frame 100 and close to the front end of the conveying path 110 . The feeding device 300 is used to feed the outer fin tube to the front end of the conveying path 110 .

[0043] The sorting and unloading device 400 is disposed on the frame 100 at a position close to the rear end of the conveying path 110 . The sorting and unloading device 400 is used to unload the outer fin tubes to the rear end of the conveying path 110 .

[0044] The loading device 300 conveys the external finned tubes to be inspected one by one to the conveying path 110. The conveying path 110 conveys the external finned tubes to be inspected from front to back, so that the external finned tubes pass through the magnetizing coil 220, the probe coil 230 and the demagnetizing coil 240 in sequence. The magnetizing coil 220 can amplify the residual magnetization of the tool and the core head mixed inside the external finned tube, so that the probe coil 230 can detect the tool and the core head mixed inside the external finned tube, thereby improving the accuracy of the flaw detection and ensuring the quality and service life of the external finned tube. The flaw detection device 200 detects and distinguishes whether the external finned tube is a qualified product or a defective product, and then the demagnetizing coil 240 demagnetizes the magnetism of the external finned tube and the tool and the core head mixed inside it. Then the conveying path 110 conveys the inspected external finned tube to the sorting and unloading device 400, and the sorting and unloading device 400 removes the inspected external finned tube from the conveying path 110.

[0045] Reference Figure 8 The detection process of the flaw detection device 200 is that the probe coil 230 collects eddy current signals and leakage magnetic signals from the external finned tube, and then transmits the eddy current signals and leakage magnetic signals to the software analysis module, and the software analysis module performs eddy current signal analysis and leakage magnetic signal analysis. When both the eddy current signal analysis and the leakage magnetic signal analysis find abnormal signals, the flaw detection device 200 distinguishes the external finned tube as a defective product, and when both the eddy current signal analysis and the leakage magnetic signal analysis find normal signals, the flaw detection device 200 distinguishes the external finned tube as a qualified product.

[0046] The feeding device 300 replaces the manual feeding of outer finned tubes one by one, and the sorting and discharging device 400 replaces the manual discharging of outer finned tubes one by one. Moreover, the outer finned tubes can quickly pass through the flaw detection device 200 and complete magnetization, flaw detection, and demagnetization, effectively improving the working efficiency of the eddy current magnetic flux leakage double flaw detection equipment for outer finned tubes.

[0047] It can be understood that the fixed seat 210 is tubular, and the magnetization coil 220, the probe coil 230, and the demagnetization coil 240 are all wound around the fixed seat 210. The magnetization coil 220, the probe coil 230, and the demagnetization coil 240 are sleeved with a protective sleeve. The magnetization coil 220, the probe coil 230, and the demagnetization coil 240 are electrically connected to a control device. The control device can be a computer.

[0048] Refer to Figure 1 and Figure 5 In some of these embodiments, the conveying channel 110 includes a rotary drive mechanism 111 and a plurality of rollers 112 distributed in the front-rear direction. The axial direction of the rollers 112 is the left-right direction. Grooves 500 for limiting the outer finned tubes are provided in the middle sections of all the rollers 112. The output end of the rotary drive mechanism 111 is in transmission connection with all the rollers 112. The rotary drive mechanism 111 drives all the rollers 112 to rotate synchronously. When the outer finned tubes are placed on the rollers 112, the outer finned tubes will fall into a plurality of grooves 500 distributed in the front-rear direction. The grooves 500 play a role in limiting the outer finned tubes. When the rollers 112 rotate, the outer finned tubes will move from front to back, preventing the outer finned tubes from shifting left and right and falling off the rollers 112.

[0049] It can be understood that the grooves 500 are U-shaped or V-shaped. The rollers 112 are provided on the frame 100 through first bearings. All the rollers 112 are in the same plane and at the same height. The rotary drive mechanism 111 includes a motor provided on the frame 100. Driven sprockets are provided at one ends of all the rollers 112, and a driving sprocket is provided at the output end of the motor. The driving sprocket and one of the driven sprockets are connected by a first chain, and the driven sprockets are connected by a second chain, enabling the motor to drive all the rollers 112 synchronously. Protective covers are provided on the frame 100 in the areas corresponding to the upper sides of all the driven sprockets.

[0050] Refer to Figure 1 、 Figure 2 and Figure 4, in some of these embodiments, it further includes a pressing-down device 600. The pressing-down device 600 includes two groups of pressing rollers 610 disposed in front of and behind the fixed seat 210. The pressing rollers 610 are used to press the finned tube down onto the supporting roller 112, so that when the supporting roller 112 conveys the finned tube past the magnetization coil 220, the probe coil 230, and the demagnetization coil 240, the finned tube can move smoothly, avoiding vibration and deviation of the finned tube, and ensuring that the magnetization coil 220, the probe coil 230, and the demagnetization coil 240 can work properly.

[0051] In some of these embodiments, the pressing-down device 600 further includes a lifting driving mechanism 620. The output end of the lifting driving mechanism 620 is connected to the pressing roller 610. The lifting driving mechanism 620 drives the pressing roller 610 to lift and lower. Initially, the lifting driving mechanism 620 can drive the pressing roller 610 to rise, so that the finned tube can smoothly enter between the pressing roller 610 and the supporting roller 112, and then the lifting driving mechanism 620 drives the pressing roller 610 to lower, so that the finned tube is smoothly pressed down onto the supporting roller 112.

[0052] It can be understood that the number of the lifting driving mechanisms 620 is two. The two lifting driving mechanisms 620 are both connected to the frame 100. The two lifting driving mechanisms 620 are disposed in front of and behind the fixed seat 210. The output ends of the lifting driving mechanisms 620 face upward and are connected to the mounting brackets 621. Two pressing rollers 610 are provided on each of the two mounting brackets 621, that is, a group of pressing rollers 610 includes two pressing rollers 610. The pressing rollers 610 on the mounting bracket 621 are located above the supporting roller 112, and the upper pressing rollers 610 and the lower supporting rollers 112 are in one-to-one correspondence in the up-and-down positions.

[0053] The lifting driving mechanism 620 can be a first air cylinder. The structure of the pressing roller 610 can be the same as that of the supporting roller 112, and the pressing roller 610 and the supporting roller 112 jointly hold the finned tube.

[0054] Referring to Figure 4 and Figure 6 , in some of these embodiments, the feeding device 300 includes a first driving mechanism 310, a first rotating shaft 320, and multiple support rods 330. The axial directions of the multiple support rods 330 are all in the left-right direction and their heights are equal. The multiple support rods 330 are distributed in the front-back direction to support each section of the finned tube. The multiple support rods 330 play a role in supporting the finned tube, and multiple finned tubes can be placed side by side on the multiple support rods 330 at the same time.

[0055] One end of the support rod 330 is inclined downward and faces the supporting roller 112. The axial direction of the first rotating shaft 320 is in the front-back direction. Multiple blocking blocks 321 are provided on the first rotating shaft 320. The output end of the first driving mechanism 310 is in transmission connection with the first rotating shaft 320. The first driving mechanism 310 can drive the first rotating shaft 320 and the multiple blocking blocks 321 to rotate.

[0056] When the material blocking block 321 rotates above one end of the support rod 330, the material blocking block 321 will block all the external finned tubes on the support rod 330 from falling onto the idler roller 112. When the material blocking block 321 rotates below the upper surface of one end of the support rod 330, the material blocking block 321 will allow the external finned tubes on the support rod 330 to roll towards the idler roller 112. When one external finned tube passes over the material blocking block 321, the first driving mechanism 310 immediately drives the material blocking block 321 to rotate above one end of the support rod 330, and the material blocking block 321 blocks other external finned tubes from rolling towards the idler roller 112, completing the feeding of one external finned tube. The first driving mechanism 310 repeatedly drives the first rotating shaft 320 and multiple material blocking blocks 321 to rotate, and the external finned tubes on the support rod 330 can be fed onto the idler roller 112 one by one.

[0057] A material blocking block 321 is provided between adjacent support rods 330.

[0058] Refer to Figure 7 , multiple support rods 330 are arranged on the left side of the idler roller 112, and a first stop rod 120 is provided in the area of the frame 100 corresponding to the right side of the idler roller 112. The first stop rod 120 prevents the external finned tubes rolling from one end of the support rod 330 from rushing out of the idler roller 112.

[0059] In some embodiments, the feeding device 300 further includes a first support frame 340. The first rotating shaft 320 is rotatably arranged on the first support frame 340 or the frame 100. The first driving mechanism 310 includes a first linear driving mechanism 311 and a connecting rod 312. The first linear driving mechanism 311 is hinged to the first support frame 340 or the frame 100. The output end of the first linear driving mechanism 311 is hinged to one end of the connecting rod 312, and the other end of the connecting rod 312 is connected to the first rotating shaft 320.

[0060] It can be understood that the connecting rod 312 is bent and can swing. The first linear driving mechanism 311 is a second air cylinder. Multiple support rods 330 are arranged on the first support frame 340, and the first support frame 340 is arranged on the left side of the frame 100.

[0061] In this embodiment, the first rotating shaft 320 is rotatably arranged on the first support frame 340 through a second bearing, and the first linear driving mechanism 311 is hinged to the first support frame 340.

[0062] Refer to Figure 5 and Figure 7, in some of these embodiments, the sorting and discharging device 400 includes a second driving mechanism 410, a second rotating shaft 420, and multiple turning rods 430. The axial direction of the second rotating shaft 420 is the front-rear direction. Multiple turning rods 430 are each provided with a hook portion. The multiple turning rods 430 are distributed on the second rotating shaft 420 along the front-rear direction. The output end of the second driving mechanism 410 is in transmission connection with the second rotating shaft 420. The second driving mechanism 410 drives the second rotating shaft 420 / turning rods 430 to rotate. The hook portions of the multiple turning rods 430 swing upward from below the roller 112 to lift the finned tube on the roller 112.

[0063] Initially, the hook portions of the multiple turning rods 430 are located below the roller 112. When the finned tube is on the roller 112 and above the hook portions of the multiple turning rods 430, the second driving mechanism 410 drives the second rotating shaft 420 / turning rods 430 to rotate. The hook portions of the multiple turning rods 430 swing upward from below the roller 112, and the hook portions of the multiple turning rods 430 lift the finned tube on the roller 112 to complete the transfer of the finned tube to the turning rods 430.

[0064] , in some of these embodiments, the sorting and discharging device 400 further includes a second support frame 440, a third driving mechanism 450, a third rotating shaft 460, and multiple sorting rods 470. A qualified product bin 441 and a non-qualified product bin 442 are provided on the second support frame 440. The roller 112, the non-qualified product bin 442, and the qualified product bin 441 are arranged in sequence from right to left. The third rotating shaft 460 is rotatably provided on the second support frame 440. The multiple sorting rods 470 are distributed on the third rotating shaft 460 along the front-rear direction. The third driving mechanism 450 is in transmission connection with the third rotating shaft 460 or the multiple sorting rods 470. The third driving mechanism 450 drives the third rotating shaft 460 and the multiple sorting rods 470 to rotate.

[0065] The multiple sorting rods 470 are inclinedly spanned across the opening of the non-qualified product bin 442, and the sorting rods 470 can guide the finned tube falling from the turning rods 430 to roll into the qualified product bin 441.

[0066] When the outer finned tubes on the turning rod 430 are qualified products, multiple sorting rods 470 are obliquely arranged across the opening of the unqualified product bin 442, that is, the right end of the sorting rod 470 is higher than the left end of the sorting rod 470, the opening of the unqualified product bin 442 is higher than the opening of the qualified product bin 441, and the opening of the unqualified product bin 442 is blocked by the sorting rod 470. The outer finned tubes transferred to the turning rod 430 roll down on the sorting rod 470 under the continued rotation of the turning rod 430, and then with the support of the sorting rod 470, the outer finned tubes will roll into the qualified product bin 441. When the outer finned tube on the flip rod 430 is a defective product, the third driving mechanism 450 drives the third rotating shaft 460 and the multiple sorting rods 470 to rotate, so that the right ends of the multiple sorting rods 470 swing upward and disengage from the opening of the defective product bin 442, and the outer finned tube will directly roll into the defective product bin 442.

[0067] In some of the embodiments, the second driving mechanism 410 is a second linear driving mechanism, the second linear driving mechanism is hinged to the frame 100 or the second support frame 440 , and the output end of the second linear driving mechanism is hinged to the turning rod 430 .

[0068] In this embodiment, the second linear drive mechanism is a third cylinder. The third cylinder is hinged to the frame 100, and the piston rod of the third cylinder is hinged to one end of the turning rod 430 away from the second rotating shaft 420. The second rotating shaft 420 is connected to the frame 100 through a third bearing.

[0069] The third driving mechanism 450 is a third linear driving mechanism, which is hinged to the second support frame 440, and the output end of the third linear driving mechanism is hinged to the plurality of sorting rods 470, or the output end of the third linear driving mechanism is hinged to the ear plate provided on the third rotating shaft 460. The third linear driving mechanism can be a fourth cylinder.

[0070] The main engine is electrically connected to the third driving mechanism 450, and the main engine controls the operation of the third driving mechanism 450. When the outer finned tube determined to be a defective product is swung upward from the bottom of the roller 112 by the hooks of the multiple flipping rods 430, the third driving mechanism 450 drives the third rotating shaft 460 and the multiple sorting rods 470 to rotate, so that the right ends of the multiple sorting rods 470 swing upward and disengage from the opening of the defective product bin 442, and the outer finned tube transferred to the flipping rod 430 will directly roll into the defective product bin 442 as the flipping rod 430 continues to rotate.

[0071] When the outer finned tubes determined to be qualified products are swung upward by the hook parts of multiple turning rods 430 from below the idler rollers 112, the third driving mechanism 450 drives the third rotating shaft 460 and multiple sorting rods 470 to rotate, so that the multiple sorting rods 470 are obliquely arranged across the opening of the unqualified product bin 442. The opening of the unqualified product bin 442 is blocked by the sorting rods 470. The outer finned tubes transferred onto the turning rods 430 roll onto the sorting rods 470 under the continuous rotation of the turning rods 430, and then, supported by the sorting rods 470, the outer finned tubes will roll into the qualified product bin 441.

[0072] Referring to Figure 7 , in some of these embodiments, there are also multiple straps 700. On the left and right side walls along the front-back direction of the opening of the qualified product bin 441, multiple pulleys 130 are provided, and on the left and right side walls along the front-back direction of the opening of the qualified product bin 441, multiple elastic members 800 are provided. The pulleys 130 are located above the elastic members 800. The two ends of the strap 700 respectively bypass the two pulleys 130 distributed left and right, and are respectively movably connected to the two elastic members 800 distributed left and right.

[0073] When the outer finned tubes fall into the qualified product bin 441 from the opening of the qualified product bin 441, the outer finned tubes will land on the multiple straps 700. Under the action of the gravity of the outer finned tubes, the elastic members 800 are stretched, and the straps 700 move downward until the number of outer finned tubes landing on the multiple straps 700 reaches the specified bundling quantity. Then, the two ends of the strap 700 are removed, and the strap 700 can directly bundle the outer finned tubes.

[0074] It can be understood that the strap 700 is a nylon drawstring. The number of straps 700 is 8. The elastic member 800 is a tension spring.

[0075] At the end of the other end of the support rod 330, there is an upward second stop rod, and the second stop rod can prevent the outer finned tubes from falling off the other end of the support rod 330. Behind the last idler roller 112 of the frame 100, there is a third stop rod, and the third stop rod can prevent the outer finned tubes from moving beyond the conveying path 110 when moving.

[0076] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0077] Certainly, the present utility model is not limited to the above embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment, characterized in that: include: The frame is provided with a conveying path, and the conveying path is used to convey the external fin tubes from front to back; The flaw detection device comprises a fixed seat and a magnetizing coil, a probe coil and a demagnetizing coil which are sequentially wound on the fixed seat from front to back, the fixed seat is correspondingly arranged in the middle section of the conveying path, so that the external finned tube can sequentially pass through the magnetizing coil, the probe coil and the demagnetizing coil, the magnetizing coil, the probe coil and the demagnetizing coil are electrically connected to the same host, the host has a software analysis module, the probe coil is used to collect eddy current signals and leakage magnetic signals and transmit the eddy current signals and the leakage magnetic signals to the software analysis module; A feeding device, disposed on the frame and close to the front end of the conveyor, the feeding device is used to feed the external finned tube to the front end of the conveyor; The sorting and unloading device is arranged on the frame at a position close to the rear end of the conveying path, and the sorting and unloading device is used to unload the external finned tubes to the rear end of the conveying path.

2. According to claim 1, a high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment is characterized in that: The conveying path includes a rotary drive mechanism and a plurality of rollers distributed along the front-to-back direction, the axial direction of the rollers is the left-right direction, the middle section of the rollers is provided with grooves for limiting the outer finned tubes, the output end of the rotary drive mechanism is transmission-connected with all the rollers, and the rotary drive mechanism drives all the rollers to rotate so as to convey the outer finned tubes from front to back.

3. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 2 is characterized by: It also includes a pressing device, which includes two groups of pressing rollers arranged at the front and rear of the fixing seat, and the pressing rollers are used to press the outer fin tube down onto the supporting roller.

4. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 3 is characterized by: The pressing device further comprises a lifting drive mechanism, the output end of which is connected to the pressing roller, and the lifting drive mechanism drives the pressing roller to move up and down so as to press the outer fin tube down onto the supporting roller.

5. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 2 is characterized by: The loading device includes a first driving mechanism, a first rotating shaft and multiple support rods, the axial directions of the multiple support rods are all left-right directions and have equal heights, the multiple support rods are distributed along the front-to-back direction to support each section of the external finned tube, one end of the support rod is tilted downward and faces the roller, the axial direction of the first rotating shaft is the front-to-back direction, a plurality of stop blocks are provided on the first rotating shaft, the output end of the first driving mechanism is transmission-connected to the first rotating shaft, the first driving mechanism drives the first rotating shaft and the multiple stop blocks to rotate, and the stop block rotates to above one end of the support rod so that the stop block blocks the external finned tube on the support rod from falling onto the roller.

6. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 5 is characterized by: The feeding device also includes a first support frame, the first rotating shaft can be rotatably arranged on the first support frame or the frame, the first driving mechanism includes a first linear driving mechanism and a connecting rod, the first linear driving mechanism is hinged to the first support frame or the frame, the output end of the first linear driving mechanism is hinged to one end of the connecting rod, and the other end of the connecting rod is connected to the first rotating shaft.

7. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 2 is characterized by: The sorting and unloading device includes a second driving mechanism, a second rotating shaft and a plurality of turning rods. The axial direction of the second rotating shaft is the front-to-back direction. The plurality of turning rods are provided with hooks. The plurality of turning rods are distributed on the second rotating shaft along the front-to-back direction. The output end of the second driving mechanism is transmission-connected to the second rotating shaft. The second driving mechanism drives the second rotating shaft / the turning rod to rotate. The hooks of the plurality of turning rods swing upward from the bottom of the roller to lift the outer fin tube on the roller.

8. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 7 is characterized by: The sorting and unloading device also includes a second support frame, a third driving mechanism, a third rotating shaft and multiple sorting rods. The second support frame is provided with a qualified product bin and a failed product bin. The rollers, the failed product bin and the qualified product bin are arranged in sequence from right to left. The third rotating shaft can be rotatably arranged on the second support frame. Multiple sorting rods are distributed on the third rotating shaft along the front and rear direction. The third driving mechanism is transmission-connected with the third rotating shaft or multiple sorting rods. The third driving mechanism drives the third rotating shaft and multiple sorting rods to rotate. Multiple sorting rods are obliquely straddled across the bin opening of the failed product bin to guide the outer fin tubes falling from the flip rod to roll into the qualified product bin.

9. The high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 8, characterized in that: The second driving mechanism is a second linear driving mechanism, the second linear driving mechanism is hinged to the frame or the second supporting frame, and the output end of the second linear driving mechanism is hinged to the turning rod.

10. A high-efficiency external fin tube eddy current leakage magnetic double flaw detection equipment according to claim 8 or 9, characterized in that: It also includes multiple straps, and multiple pulleys are provided on the left and right side walls of the warehouse opening of the qualified product bin in the front-to-back direction. Multiple elastic members are provided on the left and right side walls of the warehouse opening of the qualified product bin in the front-to-back direction. The wheels are located above the elastic members, and the two ends of the straps are respectively passed around the two pulleys distributed on the left and right, and are respectively movably connected with the two elastic members distributed on the left and right.

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