Tension tester for drag chain detection

Abstract

The invention belongs to the technical field of tension testing, and particularly relates to a tension tester for drag chain detection, which comprises a testing base, a testing power mechanism is fixedly arranged at the upper end of the testing base, and a testing speed conversion mechanism is fixedly arranged on the outer wall of the testing power mechanism. According to the invention, the tensile strength of the drag chain can be accurately determined under the condition that the change speed of the test tensile force is smaller, rapid connection between the test equipment and the to-be-tested drag chain can be realized, connection with the drag chain can be automatically released after the test is completed, convenience is provided for subsequent drag chain replacement test work, and the test efficiency is improved. According to the technical scheme, the drag chain tension test result can be visually presented, the test results of a plurality of drag chains in the same batch can be displayed and compared at the same time, the analysis effect of the test results is improved, whether the tension strength of the tested drag chain reaches a designed estimated value or not can be automatically judged, and the unqualified test results are counted.

Description

Technical Field

[0001] The invention belongs to the technical field of tension testing, and in particular relates to a tension tester for detecting a drag chain. Background Art

[0002] The drag chain is composed of many unit links. It is a device used to protect pipelines such as cables, oil pipes, and gas pipes. It can prevent the pipelines from being damaged by wear, cutting, stretching, etc. during movement. It can ensure that the pipelines move according to the predetermined trajectory and direction, and can arrange the pipelines neatly and orderly to avoid entanglement and confusion.

[0003] In the production and inspection process of drag chains, tension testing is indispensable. This test can evaluate the strength performance of drag chains when subjected to tensile force. By simulating the tension conditions that may be encountered during actual use, it is determined whether the drag chain can operate stably for a long time to prevent the drag chain from breaking or being damaged due to excessive tension during use. At present, in the tension test of drag chains, most of them are equipped with a tensile gauge to display the maximum tensile resistance of the drag chain. However, when the staff checks the test results, they need to open the test equipment for manual reading, which is quite inconvenient. In order to ensure the accuracy of the test, it is necessary to conduct multiple tests on the same batch of drag chains to reduce the test errors caused by accidental factors. However, multiple sets of test data need to be compared one by one, resulting in poor analysis of the test results, which has an adverse effect on use. Summary of the invention

[0004] The object of the present invention is to provide a tension tester for detecting a drag chain in view of the above-mentioned problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions: a tension tester for drag chain detection, comprising a test base, a test power mechanism is fixedly installed on the upper end of the test base, and the test power mechanism is used to provide the pulling force required in the test process;

[0006] A test speed conversion mechanism is fixedly mounted on the outer wall of the test power mechanism, and the test speed conversion mechanism is used to automatically convert the pulling speed of the test power mechanism;

[0007] A fastening connection mechanism is fixedly installed at the lower output end of the test power mechanism and the upper end of the test base, and the fastening connection mechanism is used to connect and fix the towline to be tested;

[0008] A test result intuitive display and comparison mechanism is also fixedly installed on one side of the upper end of the test base, and the test result intuitive display and comparison mechanism is used to intuitively display and compare the final tensile test results of multiple groups of drag chains;

[0009] A test result feedback mechanism is also installed in the test power mechanism, and the test result feedback mechanism is used to feed back the strength of the test tension to the test result visual display comparison mechanism, and drive the test result visual display comparison mechanism to act;

[0010] The test result intuitive display comparison mechanism is also equipped with a test result non-standard feedback mechanism, and the test result non-standard feedback mechanism is used to monitor and feedback whether the drag chain tension test result reaches a preset value;

[0011] A production quality failure warning mechanism is fixedly mounted on the upper end of the test base, and the production quality failure warning mechanism is used to automatically count the information fed back by the test result failure feedback mechanism.

[0012] The U-shaped bracket has two springs which are symmetrically connected to the upper end of the U-shaped bracket and the lower end of the U-shaped bracket, and the upper end of the U-shaped bracket is fixedly provided with a double-axis motor, and the output ends of both ends of the double-axis motor are transmission-connected to the upper end of the rotating screw through a bevel gear assembly, and a lifting seat is threadedly sleeved on the rod wall of the rotating screw, and the same lifting plate is fixedly connected between the two lifting seats, and two jacks are symmetrically provided on the surface of the lifting plate, and pulling rods are movably sleeved in the corresponding jacks, and the lower ends of the two pulling rods are fixedly connected to the same pulling plate, and the upper ends of the pulling plate and the lower ends of the lifting plate are fixedly connected to two strong springs sleeved outside the pulling rods, and the upper ends of the two pulling rods are fixedly connected to the same anti-slip plate, and the lower ends of the anti-slip plate are fixedly connected to a conversion switch through an elastic telescopic rod.

[0013] In the above-mentioned tension tester for drag chain detection, the test speed conversion mechanism includes a conversion round shell fixedly mounted outside the U-shaped vertical plate, a rotating shaft is rotatably connected at the center of the inner wall of the conversion round shell, a rotating motor for driving the rotating shaft to rotate is fixedly mounted on the outer wall of the conversion round shell, an arc-shaped pressing block is fixedly connected to the shaft wall, and a high-power test switch and a low-power test switch are symmetrically fixedly mounted on the inner wall of the conversion round shell.

[0014] In the above-mentioned tension tester for drag chain detection, the fastening connection mechanism includes two symmetrically arranged side plates, and a bidirectional screw is rotatably connected between the two side plates. A driving motor for driving the bidirectional screw to rotate is fixedly installed on the outer wall of one of the side plates, and two movable plates are symmetrically threadedly sleeved on the rod wall of the bidirectional screw. The lower end side wall of the movable plate is fixedly connected with a plug-in rod, and the side wall of the side plate is fixedly sleeved with a guide cylinder slidably sleeved with the plug-in rod.

[0015] In the above-mentioned tension tester for drag chain detection, the test result intuitive display comparison mechanism includes two longitudinal electric slide rails symmetrically fixedly installed on the upper end of the test base, the upper ends of the sliders in the two longitudinal electric slide rails are fixedly connected to the same drawing board, the upper end of the test base is fixedly installed with a vertical electric slide rail located on one side of the drawing board, the front end of the slider in the vertical electric slide rail is fixedly connected to a fixed shell, the fixed shell is provided with a plurality of sockets arranged side by side front and back at one end close to the drawing board, and push-pull rods are movablely sleeved in the corresponding sockets, and the ends of the multiple push-pull rods located in the fixed shell are fixedly connected to the same push-pull plate, and a plurality of reset springs sleeved on the outside of the push-pull rods are fixedly connected between the push-pull plate and the fixed shell, the rear side of the push-pull plate is fixedly connected to a thrust permanent magnet plate, and a thrust electromagnetic plate is fixedly installed on the rear side of the inner wall of the fixed shell, and the ends of the multiple push-pull rods located outside the fixed shell are fixedly connected to the same mounting plate, and a paintbrush is fixedly sleeved on the surface of the mounting plate.

[0016] In the above-mentioned tension tester for drag chain detection, the test result feedback mechanism includes a resistance rod fixedly connected to the lower end of the anti-slip plate, the surface of the lifting plate is provided with a sleeve hole mounted outside the resistance rod, the inner wall of the lifting plate corresponding to the sleeve hole is fixedly connected with a conductive connector electrically in contact with the resistance rod, and the side of the lifting plate opposite to the anti-slip plate and the side of the lifting plate opposite to the pulling plate are both fixedly connected with an elastic folded insulating rubber sleeve mounted outside the resistance rod.

[0017] In the above-mentioned tension tester for drag chain detection, the feedback mechanism for test result failure to meet the standard includes a feedback shell fixedly mounted on the upper end of the fixed shell, the upper end of the feedback shell is provided with a strip through-hole, and a plurality of positioning slide bars arranged side by side are fixedly connected to the corresponding strip through-hole, the plurality of positioning slide bars are slidably sleeved with the same adjusting plate outside the plurality of positioning slide bars, the lower end side wall of the adjusting plate is provided with a plurality of plug holes, and an extension slide bar is movably sleeved in the corresponding plug holes, one end of the plurality of extension slide bars is fixedly connected to the same positioning plate, a standard switch is fixedly mounted on the lower end side wall of the positioning plate, a plurality of return springs sleeved outside the extension slide bar are fixedly connected between the positioning plate and the adjusting plate, the upper end of the push-pull plate is fixedly connected with a ramming rod of an L-shaped structure, the upper end of the ramming rod passes through the strip opening provided at the upper end of the fixed shell and extends into the feedback shell, the upper end of the adjusting plate is fixedly connected with a pointer, and the upper end of the feedback shell is fixedly provided with a tensile strength scale plate arranged opposite to the pointer.

[0018] In the above-mentioned tension tester for drag chain detection, the production quality unqualified warning mechanism includes a warning shell, a transmission screw is rotatably connected inside the warning shell, a servo motor for driving the transmission screw to rotate is fixedly installed on the outer wall of the warning shell, a pressing plate is threadedly sleeved on the rod wall of the transmission screw, a warning switch is fixedly installed on the rear side of the inner wall of the warning shell, and a warning device is fixedly installed on the outer wall of the warning shell.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the test power mechanism and test speed conversion mechanism, during the initial pulling test of the drag chain, the drag chain can be tensioned at a higher test speed first, and then the drag chain can be tested for tension at a lower test speed. In this way, the tensile strength of the drag chain can be accurately determined when the test tension changes at a lower speed, thereby ensuring the accuracy of the test results.

[0021] 2. Through the fastening connection mechanism, the test equipment can be quickly connected to the towline to be tested. After the test is completed, the connection with the towline can be automatically released, so that the towline falls automatically, which provides convenience for the subsequent towline replacement test. Compared with the existing working mode of fixing the towline by screws and nuts, this method is more convenient and quick to operate, and can effectively improve the test efficiency.

[0022] 3. Through the test result intuitive display comparison mechanism and test result feedback mechanism, the drag chain tension test results can be presented intuitively, and the test results of multiple drag chains in the same batch can be displayed and compared at the same time, so that the analysis effect of the test results can be improved, which is convenient for the staff to confirm the test results.

[0023] 4. Through the set test result substandard feedback mechanism and production quality unqualified warning mechanism, during the tension test of the drag chain, it can automatically determine whether the tested drag chain tension strength reaches the design estimated value, and the unqualified test results are counted. Once the number of unqualified results reaches the set threshold, it will automatically trigger an alarm and issue a prompt to the staff so that the staff can check whether there are problems with the production line in time.

[0024] In summary: the present invention can accurately determine the tensile strength of the drag chain when the test tension change speed is smaller, thereby ensuring the accuracy of the test result, and can realize the rapid connection between the test equipment and the drag chain to be tested. After the test is completed, the connection with the drag chain can be automatically released, so that the drag chain automatically falls, which provides convenience for the subsequent drag chain replacement test work, and can intuitively present the drag chain tension test results, and can simultaneously display and compare the test results of multiple drag chains of the same batch, so that the analysis effect of the test results can be improved, and it can automatically determine whether the tested drag chain tension strength reaches the design estimated value, and statistics the unqualified test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0026] Figure 2It is a structural schematic diagram of the test power mechanism of the present invention;

[0027] Figure 3 It is a cross-sectional structural schematic diagram of the test speed conversion mechanism of the present invention;

[0028] Figure 4 is a structural schematic diagram of the fastening connection mechanism of the present invention;

[0029] Figure 5 It is a cross-sectional structural schematic diagram of the test result intuitive display comparison mechanism of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the test result feedback mechanism of the present invention;

[0031] Figure 7 It is a schematic cross-sectional structural diagram of the test result failure feedback mechanism of the present invention;

[0032] Figure 8 It is a side sectional structural schematic diagram of the unqualified production quality warning mechanism of the present invention.

[0033] In the figure: 1 test base, 2 test power mechanism, 21 U-shaped vertical plate, 22 rotating screw, 23 double-axis motor, 24 bevel gear assembly, 25 lifting seat, 26 lifting plate, 27 pulling rod, 28 pulling plate, 29 strong spring, 210 anti-slip plate, 211 elastic telescopic rod, 212 conversion switch, 3 test speed conversion mechanism, 31 conversion round shell, 32 rotating shaft, 33 rotating motor, 34 arc pressing block, 35 high-power test switch, 36 low-power test switch, 4 fastening connection mechanism, 41 side plate, 42 bidirectional screw, 43 driving motor, 44 moving plate, 45 plug-in rod, 46 guide cylinder, 5 test result intuitive display comparison mechanism, 51 longitudinal electric slide rail, 52 drawing board, 53 vertical electric slide rail, 54 fixed shell, 55 push-pull rod, 56 push-pull plate, 57 return spring, 58 thrust permanent magnet plate, 59 thrust electromagnetic plate, 510 mounting plate, 511 paintbrush, 6 test result feedback mechanism, 61 resistor rod, 62 sleeve hole, 63 conductive contact piece, 64 elastic folding insulating rubber sleeve, 7 test result non-compliant feedback mechanism, 71 feedback shell, 72 strip opening, 73 positioning slide bar, 74 adjustment plate, 75 extension slide bar, 76 positioning plate, 77 compliance switch, 78 pull-back spring, 79 tamping rod, 710 strip opening, 711 pointer, 712 tensile strength scale plate, 8 production quality non-compliant warning mechanism, 81 warning shell, 82 transmission screw, 83 servo motor, 84 pressing plate, 85 warning switch, 86 warning device. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] like Figure 1-Figure 8 As shown, a tension tester for drag chain detection includes a test base 1, a test power mechanism 2 is fixedly installed on the upper end of the test base 1, and the test power mechanism 2 is used to provide the pulling force required in the test process. The test power mechanism 2 includes a U-shaped vertical plate 21 fixedly installed on the upper end of the test base 1, and two rotating screws 22 are symmetrically connected to the lower end of the horizontal part of the U-shaped vertical plate 21 and the upper end of the test base 1. The upper end of the rotating screw 22 passes through the upper end of the U-shaped vertical plate 21, and a double-axis motor 23 is fixedly installed on the upper end of the U-shaped vertical plate 21. The output ends of both ends of the double-axis motor 23 are connected to the rotating screw 22 through a bevel gear assembly 24. The upper end is connected by transmission, the rod wall of the rotating screw rod 22 is threadedly sleeved with a lifting seat 25, and the same lifting plate 26 is fixedly connected between the two lifting seats 25. The surface of the lifting plate 26 is symmetrically provided with two plug holes, and a pulling rod 27 is movably sleeved in the corresponding plug holes. The lower ends of the two pulling rods 27 are fixedly connected with the same pulling plate 28, and the upper end of the pulling plate 28 and the lower end of the lifting plate 26 are fixedly connected with two strong springs 29 sleeved outside the pulling rod 27. The upper ends of the two pulling rods 27 are fixedly connected with the same anti-slip plate 210, and the lower end of the anti-slip plate 210 is fixedly connected with a conversion switch 212 through an elastic telescopic rod 211;

[0036] A test speed conversion mechanism 3 is fixedly installed on the outer wall of the test power mechanism 2. The test speed conversion mechanism 3 is used to automatically convert the pulling speed of the test power mechanism 2. The test speed conversion mechanism 3 includes a conversion round shell 31 fixedly installed outside the U-shaped vertical plate 21. A rotating shaft 32 is rotatably connected at the center of the inner wall of the conversion round shell 31. A rotating motor 33 for driving the rotating shaft 32 to rotate is fixedly installed on the outer wall of the conversion round shell 31. An arc-shaped pressing block 34 is fixedly connected to the shaft wall of the rotating shaft 32. A high-power test switch 35 and a low-power test switch 36 are symmetrically fixedly installed on the inner wall of the conversion round shell 31.

[0037] The lower output end of the test power mechanism 2 and the upper end of the test base 1 are both fixedly provided with a fastening connection mechanism 4, which is used to connect and fix the drag chain to be tested. The fastening connection mechanism 4 includes two symmetrically arranged side plates 41, and a bidirectional screw 42 is rotatably connected between the two side plates 41. A driving motor 43 for driving the bidirectional screw 42 to rotate is fixedly provided on the outer wall of one of the side plates 41, and two moving plates 44 are symmetrically threadedly sleeved on the rod wall of the bidirectional screw 42, and a plug-in rod 45 is fixedly connected to the lower side wall of the moving plate 44, and a guide cylinder 46 slidably sleeved with the plug-in rod 45 is fixedly sleeved on the side wall of the side plate 41;

[0038] A test result intuitive display comparison mechanism 5 is also fixedly installed on one side of the upper end of the test base 1. The test result intuitive display comparison mechanism 5 is used to intuitively display and compare the final tension test results of multiple groups of drag chains. The test result intuitive display comparison mechanism 5 includes two longitudinal electric slide rails 51 symmetrically fixedly installed on the upper end of the test base 1. The upper ends of the sliders in the two longitudinal electric slide rails 51 are fixedly connected to the same drawing board 52. The upper end of the test base 1 is fixedly installed with a vertical electric slide rail 53 located on one side of the drawing board 52. The front end of the slider in the vertical electric slide rail 53 is fixedly connected to a fixed shell 54. The fixed shell 54 is close to the drawing board. One end of the plate 52 is provided with a plurality of sockets arranged side by side in front and back, and push-pull rods 55 are movablely sleeved in the corresponding sockets, one end of the plurality of push-pull rods 55 located in the fixed shell 54 is fixedly connected to the same push-pull plate 56, a plurality of return springs 57 sleeved outside the push-pull rods 55 are fixedly connected between the push-pull plate 56 and the fixed shell 54, a thrust permanent magnet plate 58 is fixedly connected to the rear side of the push-pull plate 56, a thrust electromagnetic plate 59 is fixedly installed on the rear side of the inner wall of the fixed shell 54, one end of the plurality of push-pull rods 55 located outside the fixed shell 54 is fixedly connected to the same mounting plate 510, and a paintbrush 511 is fixedly sleeved on the surface of the mounting plate 510;

[0039] A test result feedback mechanism 6 is also installed in the test power mechanism 2. The test result feedback mechanism 6 is used to feedback the strength of the test pulling force to the test result intuitive display comparison mechanism 5, and drive the test result intuitive display comparison mechanism 5 to act. The test result feedback mechanism 6 includes a resistor rod 61 fixedly connected to the lower end of the anti-slip plate 210, and a sleeve hole 62 is provided on the surface of the lifting plate 26 to be sleeved outside the resistor rod 61. The inner wall of the lifting plate 26 corresponding to the sleeve hole 62 is fixedly connected with a conductive contact 63 that is in electrical contact with the resistor rod 61. The side of the lifting plate 26 opposite to the anti-slip plate 210 and the side of the lifting plate 26 opposite to the pulling plate 28 are fixedly connected with an elastic folded insulating rubber sleeve 64 sleeved outside the resistor rod 61.

[0040] The test result intuitive display comparison mechanism 5 is also equipped with a test result non-standard feedback mechanism 7, which is used to monitor and feedback whether the drag chain tension test result reaches the preset value. The test result non-standard feedback mechanism 7 includes a feedback shell 71 fixedly installed on the upper end of the fixed shell 54, and a strip-shaped through hole 72 is opened on the upper end of the feedback shell 71, and a plurality of positioning slide bars 73 arranged side by side are fixedly connected to the corresponding strip-shaped through hole 72. The plurality of positioning slide bars 73 are externally slidably sleeved with the same adjustment plate 74, and a plurality of plug holes are opened on the lower side wall of the adjustment plate 74, and the movable plug sleeves in the corresponding plug holes have extension slides. Rod 75, one end of the plurality of extended slide rods 75 is fixedly connected to the same positioning plate 76, a standard switch 77 is fixedly installed on the lower side wall of the positioning plate 76, a plurality of return springs 78 sleeved outside the extended slide rod 75 are fixedly connected between the positioning plate 76 and the adjustment plate 74, an L-shaped tamping rod 79 is fixedly connected to the upper end of the push-pull plate 56, the upper end of the tamping rod 79 passes through the strip opening 710 opened at the upper end of the fixed shell 54 and extends into the feedback shell 71, a pointer 711 is fixedly connected to the upper end of the adjustment plate 74, and a tensile strength scale plate 712 arranged opposite to the pointer 711 is fixedly installed on the upper end of the feedback shell 71;

[0041] A production quality failure warning mechanism 8 is fixedly installed on the upper end of the test base 1. The production quality failure warning mechanism 8 is used to automatically count the information fed back by the test result feedback mechanism 7 that does not meet the standards. The production quality failure warning mechanism 8 includes a warning shell 81, and a transmission screw 82 is rotatably connected inside the warning shell 81. A servo motor 83 for driving the transmission screw 82 to rotate is fixedly installed on the outer wall of the warning shell 81. A pressing plate 84 is threadedly sleeved on the rod wall of the transmission screw 82. A warning switch 85 is fixedly installed on the rear side of the inner wall of the warning shell 81, and an alarm 86 is fixedly installed on the outer wall of the warning shell 81.

[0042] A PLC controller is fixedly installed on the outer wall of the U-shaped vertical plate 21, and the PLC controller is electrically connected to the test power mechanism 2, the test speed conversion mechanism 3, the fastening connection mechanism 4, the test result intuitive display comparison mechanism, the test result feedback mechanism 6, the test result substandard feedback mechanism 7 and the production quality unqualified warning mechanism 8 respectively.

[0043] The operating principle of the present invention is described as follows: the drag chain to be tested is fixed to the lower end of the pulling plate 28 and the upper end of the test base 1. At this time, the arc-shaped pressing block 34 is pressed on the high-power test switch 35. The PLC controller controls the double-axis motor 23 to start. The double-axis motor 23 drives the two rotating screws 22 to rotate synchronously through the bevel gear assembly 24. The lifting seat 25 drives the lifting plate 26 to move up through the threaded sleeve effect of the rotating screw 22 and the lifting seat 25. The lifting plate 26 is forced to move upward. The force spring 29 drives the pulling plate 28 and the upper end of the drag chain to move upward. Since the high-power test switch 35 is pressed and triggered at this time, the dual-axis motor 23 drives the pulling plate 28 at a higher speed to drive the drag chain to move upward until the drag chain is pulled and tensioned. At this time, as the lifting plate 26 continues to move upward, the pulling plate 28 is fixed by the upper end of the drag chain, so that the lifting plate 26 moves upward relative to the pulling plate 28 to overcome the elastic force of the strong spring 29 until the lifting plate 26 acts on the conversion switch 212. At this time, the PLC control The controller controls the rotating motor 33 to drive the rotating shaft 32 to rotate, thereby causing the arc-shaped pressing block 34 to rotate and press on the low-power test switch 36, so that the dual-axis motor 23 drives the lifting plate 26 to move upward at a relatively low rotation speed, specifically maintaining an upward speed of 20 mm / min, further stretching the strong spring 29 to provide a greater pulling force for pulling until the drag chain is broken. At this time, under the reset action of the strong spring 29, the pulling plate 28 moves toward the lifting plate 26, thereby causing the lifting plate 26 to break away from the pressing contact with the conversion switch 212. At this time, the PLC controller receives a signal that the conversion switch 212 is not triggered, and the PLC controller controls the dual-axis motor 23 to stop continuing to move. In the initial pulling test of the drag chain, the drag chain can be tensioned at a relatively high test speed first, and then the drag chain can be subjected to a tension test at a relatively low test speed, thereby being able to accurately determine the tensile strength of the drag chain under a state where the test tension changes at a lower speed, thereby ensuring the accuracy of the test results.

[0044] When fixing the drag chain, align the pin holes at both ends of the drag chain with the plug-in rod 45, and the PLC controller controls the drive motor 43 to move, and the drive motor 43 drives the bidirectional screw 42 to rotate synchronously. Through the threaded sleeve effect of the bidirectional screw 42 and the movable plate 44, the movable plate 44 drives the two plug-in rods 45 to move back to each other, so that the plug-in rod 45 is inserted into the pin hole on the end side of the drag chain, so that the plug-in rod 45 is fixed to the drag chain, and the drag chain is quickly installed and fixed, which is convenient for the use of tension testing. After the drag chain is broken and the tension test is completed, when the PLC controller controls the dual-axis motor 23 to stop moving, the drive motor 43 is synchronously controlled to reverse, so that the plug-in rod 45 is disconnected from the drag chain, and the drag chain is quickly detached, which can realize the rapid connection between the test equipment and the drag chain to be tested. After the test is completed, the connection with the drag chain can be automatically released, so that the drag chain automatically falls off, which provides convenience for the subsequent drag chain replacement test. Compared with the existing working mode of fixing the drag chain by screws and nuts, this method is more convenient and quick to operate, and can effectively improve the test efficiency.

[0045] In the tension test of the drag chain, due to the upward movement of the lifting plate 26 relative to the pulling plate 28, the conductive contact 63 slides relative to the resistor rod 61. Specifically, the stronger the tensile resistance of the drag chain being tested, the greater the distance that the lifting plate 26 can move upward relative to the pulling plate 28 to overcome the elastic force of the strong spring 29, and thus the greater the sliding distance of the conductive contact 63 relative to the resistor rod 61, the smaller the access resistance of the resistor rod 61, and the conductive contact 63 and the resistor rod 61 are connected in series to the power supply circuit of the thrust electromagnetic plate 59, and When testing the drag chain, the PLC controller controls the power supply device to supply power to the thrust electromagnetic plate 59, so that the conductive contact 63 slides relatively on the resistor rod 61. When the resistance value of the resistor rod 61 changes, it is directly fed back to the power supply current of the thrust electromagnetic plate 59, thereby changing the magnetism of the thrust electromagnetic plate 59. The thrust electromagnetic plate 59 is energized to generate the same magnetism as the thrust permanent magnet plate 58, thereby driving the push-pull plate 56 and the push-pull rod 55 to overcome the elastic force of the reset spring 57 to push the mounting plate 510 and the paintbrush. 511 moves forward, so that the paintbrush 511 draws a straight line segment on the slide board. When the maximum tension of the drag chain is reached during the test, the conductive contact piece 63 slides the maximum distance relative to the resistor rod 61, so that the access resistance of the resistor rod 61 is minimized, and the sliding distance of the paintbrush 511 on the slide board reaches the maximum. The length of the drawn line segment represents the maximum tension of the current drag chain test. When testing different drag chains of the same batch for multiple times, the PLC controller first controls the longitudinal electric slide rail 51 with the animation board 52 to move backward, and the vertical electric slide rail 53 drives the fixed shell 54 to move down a distance. Then the PLC controller controls the longitudinal electric slide rail 51 with the animation board 52 to move forward, so that the drawing board 52 contacts the paintbrush 511 again, and then the results of multiple drag chain tension tests can be displayed on the same drawing board 52 in the form of straight line segments, and the drag chain tension test results can be presented intuitively. In addition, the test results of multiple drag chains of the same batch can be displayed and compared at the same time, so that the analysis effect of the test results can be improved, which is convenient for the staff to confirm the test results.

[0046] Before the tension test of the drag chain, there is an estimated standard value for the tension strength of the drag chain. Through the cooperation of the pointer 711 and the tension strength scale plate 712, the adjustment plate 74 is slid to a suitable position along the positioning slide bar 73. When the drag chain is tested, the movement of the push-pull plate 56 drives the tamping rod 79 to move synchronously. When the tamping rod 79 can finally act on the standard switch 77, it indicates that the tension strength of the drag chain currently being tested has reached the standard. After the final test, the tamping rod 79 cannot be pressed to act on the standard switch 77. At this time, after the PLC controller has completed the test and has not received the feedback signal from the standard switch 77, the PLC controller controls the servo motor 83 to drive the transmission screw 82 to rotate for 5 seconds. Through the threads of the transmission screw 82 and the pressing plate 84, the tamping rod 79 can be pressed to act on the standard switch 77. The socketing action causes the pressing plate 84 to move a certain distance in the warning shell 81. In the inspection of ten drag chains of the same batch, if the tensile strength of three drag chains does not meet the standard, that is, after the servo motor 83 drives the transmission screw 82 to work three times, the pressing plate 84 will act on the warning switch 85, and then the alarm 86 will sound. The staff can stop the tensile testing of this batch of drag chains, prompting the staff to inspect the production quality of the production line. It can automatically determine whether the tensile strength of the tested drag chains reaches the designed estimated value, and count the unqualified test results. Once the number of unqualified results reaches the set threshold, it will automatically trigger an alarm to prompt the staff so that the staff can check whether there are problems with the production line in time.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tension tester for drag chain detection, comprising a test base (1), characterized in that: A test power mechanism (2) is fixedly mounted on the upper end of the test base (1), and the test power mechanism (2) is used to provide the pulling force required during the test process; A test speed conversion mechanism (3) is fixedly mounted on the outer wall of the test power mechanism (2), and the test speed conversion mechanism (3) is used to automatically convert the pulling speed of the test power mechanism (2); A fastening connection mechanism (4) is fixedly mounted on the lower output end of the test power mechanism (2) and the upper end of the test base (1), and the fastening connection mechanism (4) is used to connect and fix the towline to be tested; A test result intuitive display comparison mechanism (5) is also fixedly mounted on one side of the upper end of the test base (1), and the test result intuitive display comparison mechanism (5) is used to intuitively display and compare the final tensile test results of multiple groups of drag chains; A test result feedback mechanism (6) is also installed in the test power mechanism (2), and the test result feedback mechanism (6) is used to feed back the strength of the test tension to the test result visual display comparison mechanism (5), and drive the test result visual display comparison mechanism (5) to operate; The test result intuitive display comparison mechanism (5) is also provided with a test result non-standard feedback mechanism (7), and the test result non-standard feedback mechanism (7) is used to monitor and feedback whether the drag chain tension test result reaches a preset value; A production quality failure warning mechanism (8) is fixedly mounted on the upper end of the test base (1), and the production quality failure warning mechanism (8) is used to automatically collect statistics on information fed back by the test result failure feedback mechanism (7).

2. A tension tester for drag chain detection according to claim 1, characterized in that: The test power mechanism (2) comprises a U-shaped vertical plate (21) fixedly mounted on the upper end of the test base (1); the lower end of the horizontal portion of the U-shaped vertical plate (21) and the upper end of the test base (1) are symmetrically rotatably connected with two rotating screws (22); the upper ends of the rotating screws (22) penetrate the upper end of the U-shaped vertical plate (21); a double-axis motor (23) is fixedly mounted on the upper end of the U-shaped vertical plate (21); both end output ends of the double-axis motor (23) are transmission-connected to the upper end of the rotating screw (22) via a bevel gear assembly (24); a lifting seat (25) is threadedly sleeved on the rod wall of the rotating screw (22); the two lifting seats The lifting plate (25) is fixedly connected with a same lifting plate (26), the surface of the lifting plate (26) is symmetrically provided with two insertion holes, and a pulling rod (27) is movably inserted in the corresponding insertion holes, the lower ends of the two pulling rods (27) are fixedly connected with a same pulling plate (28), the upper end of the pulling plate (28) and the lower end of the lifting plate (26) are fixedly connected with two strong springs (29) sleeved outside the pulling rods (27), the upper ends of the two pulling rods (27) are fixedly connected with a same anti-slip plate (210), and the lower end of the anti-slip plate (210) is fixedly connected with a conversion switch (212) through an elastic telescopic rod (211).

3. A tension tester for drag chain detection according to claim 2, characterized in that: The test speed conversion mechanism (3) comprises a conversion round shell (31) fixedly mounted outside the U-shaped vertical plate (21); a rotating shaft (32) is rotatably connected to the center of the inner wall of the conversion round shell (31); a rotating motor (33) for driving the rotating shaft (32) to rotate is fixedly mounted on the outer wall of the conversion round shell (31); an arc-shaped pressing block (34) is fixedly connected to the shaft wall of the rotating shaft (32); and a high-power test switch (35) and a low-power test switch (36) are symmetrically fixedly mounted on the inner wall of the conversion round shell (31).

4. A tension tester for drag chain detection according to claim 1, characterized in that: The fastening connection mechanism (4) comprises two symmetrically arranged side plates (41), a bidirectional screw (42) being rotatably connected between the two side plates (41), a driving motor (43) for driving the bidirectional screw (42) to rotate is fixedly mounted on the outer wall of one of the side plates (41), two movable plates (44) are symmetrically threadedly sleeved on the rod wall of the bidirectional screw (42), a plug-in rod (45) is fixedly connected to the side wall of the lower end of the movable plate (44), and a guide cylinder (46) slidably sleeved on the side wall of the side plate (41) is fixedly sleeved.

5. A tension tester for drag chain detection according to claim 1, characterized in that: The test result intuitive display comparison mechanism (5) comprises two longitudinal electric slide rails (51) symmetrically fixedly mounted on the upper end of the test base (1); the upper ends of the sliders in the two longitudinal electric slide rails (51) are fixedly connected to the same drawing board (52); the upper end of the test base (1) is fixedly mounted with a vertical electric slide rail (53) located on one side of the drawing board (52); the front end of the slider in the vertical electric slide rail (53) is fixedly connected to a fixed shell (54); a plurality of jacks arranged side by side in front and back are provided at one end of the fixed shell (54) close to the drawing board (52); and push-pull rods (55) are provided in the corresponding movable sleeves in the jacks. One end of the push-pull rod (55) located inside the fixed shell (54) is fixedly connected to the same push-pull plate (56), a plurality of return springs (57) sleeved outside the push-pull rod (55) are fixedly connected between the push-pull plate (56) and the fixed shell (54), a thrust permanent magnet plate (58) is fixedly connected to the rear side of the push-pull plate (56), a thrust electromagnetic plate (59) is fixedly installed on the rear side of the inner wall of the fixed shell (54), and one end of the plurality of push-pull rods (55) located outside the fixed shell (54) is fixedly connected to the same mounting plate (510), and a paintbrush (511) is fixedly inserted on the surface of the mounting plate (510).

6. A tension tester for drag chain detection according to claim 2, characterized in that: The test result feedback mechanism (6) comprises a resistor rod (61) fixedly connected to the lower end of the anti-slip plate (210); a sleeve hole (62) sleeved outside the resistor rod (61) is opened on the surface of the lifting plate (26); a conductive contact piece (63) electrically in contact with the resistor rod (61) is fixedly connected to the inner wall of the sleeve hole (62) of the lifting plate (26); and an elastic folded insulating rubber sleeve (64) sleeved outside the resistor rod (61) is fixedly connected to the side of the lifting plate (26) opposite to the anti-slip plate (210) and the side of the lifting plate (26) opposite to the pulling plate (28).

7. A tension tester for drag chain detection according to claim 5, characterized in that: The test result non-compliant feedback mechanism (7) comprises a feedback shell (71) fixedly mounted on the upper end of the fixed shell (54); a strip-shaped opening (72) is provided at the upper end of the feedback shell (71); and a plurality of positioning slide bars (73) arranged side by side are fixedly connected in the corresponding strip-shaped opening (72); the plurality of positioning slide bars (73) are slidably sleeved with the same adjustment plate (74) outside; a plurality of insertion holes are provided on the side wall of the lower end of the adjustment plate (74); and an extension slide bar (75) is movably sleeved in the corresponding insertion holes; one end of the plurality of extension slide bars (75) is fixedly connected with the same positioning plate (76); and the positioning plate (76) is A target switch (77) is fixedly mounted on the side wall at the lower end; a plurality of return springs (78) sleeved on the outside of the extension slide rod (75) are fixedly connected between the positioning plate (76) and the adjusting plate (74); an L-shaped tamping rod (79) is fixedly connected to the upper end of the push-pull plate (56); the upper end of the tamping rod (79) extends into the feedback shell (71) through a strip opening (710) provided at the upper end of the fixed shell (54); a pointer (711) is fixedly connected to the upper end of the adjusting plate (74); and a tensile strength scale plate (712) arranged opposite to the pointer (711) is fixedly mounted on the upper end of the feedback shell (71).

8. A tension tester for drag chain detection according to claim 1, characterized in that: The unqualified production quality warning mechanism (8) comprises a warning shell (81), a driving screw (82) is rotatably connected inside the warning shell (81), a servo motor (83) for driving the driving screw (82) to rotate is fixedly mounted on the outer wall of the warning shell (81), a pressing plate (84) is threadedly sleeved on the rod wall of the driving screw (82), a warning switch (85) is fixedly mounted on the rear side of the inner wall of the warning shell (81), and a warning device (86) is fixedly mounted on the outer wall of the warning shell (81).

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