Tensile Property Detection Device for a High-Flexibility Drag Chain Cable

Abstract

The present invention belongs to the technical field of detection of drag chain cables, and in particular relates to a tensile property detection device for a highly flexible drag chain cable, including a support plate. One side of the center of the support plate is provided with a mounting plate. The side walls of the support plate at positions on both sides of the mounting plate are fixedly installed with top plates, and clamping mechanisms are installed on both top plates. The side walls on the opposite sides of the two clamping mechanisms are fixedly connected with connecting blocks. A heating mechanism is installed on one of the connecting blocks, and a heat measuring mechanism is installed on the other connecting block. The lower end of the side wall of the support plate is fixedly installed with a fixing plate, and a gas supply mechanism and a triggering mechanism are installed on the fixing plate. By applying an ultimate tensile force and detecting the drag chain cable in an environment of heating, vibration and bending, the detection result of the present invention is more in line with the actual situation, and at the same time, it can quickly detect whether the conductor and the insulating outer skin of the drag chain cable are damaged, greatly reducing the detection difficulty of tensile damage to the drag chain cable.

Description

Technical Field

[0001] The present invention belongs to the technical field of drag chain cable detection, and in particular relates to a tensile property detection device for high-flexibility drag chain cables. Background Art

[0002] High-flexibility drag chain cables are high-flexibility special cables that can move back and forth following a drag chain without being easily worn. They are usually applied in fields such as industrial electronic systems, automatic production lines, warehousing equipment, robots, fire protection systems, cranes, numerical control machine tools, and metallurgical industries. The tensile property detection of drag chain cables is an important link to ensure their quality and reliability.

[0003] Currently, when detecting the tensile properties of drag chain cables, there are generally two methods. One is to apply a tensile force to the drag chain cable and record the tensile force in real time until the drag chain cable is broken. The other is to apply a preset maximum tensile force to the drag chain cable and then detect whether the cable can be used normally to determine whether the tensile properties of the drag chain cable meet the usage requirements, such as a tensile property detection device for high-flexibility drag chain cables disclosed in Patent Publication No. CN215640565U.

[0004] Since in actual use, multiple cables are installed inside a drag chain and an appropriate amount of filler is also filled to ensure the stability of each cable and prevent it from being scattered. However, this will cause the heat generated by the cables to be not easily dissipated in time, that is, the drag chain cables are at a relatively high temperature during operation. After the temperature rises, the cable material will soften and the tensile property will weaken. If the tensile properties of the drag chain cables are only detected at room temperature, the detection results will not be close enough to the actual situation. Secondly, if the conductor of the cable is stretched and cannot be used normally, it can be quickly measured using a special testing device (such as an ammeter). However, for the insulating outer skin of the drag chain cable, if the insulating outer skin is stretched and broken or damaged, there is no special testing device to quickly measure it, which increases the difficulty of detecting the tensile properties of the outer skin of the drag chain cable to a certain extent. Summary of the Invention

[0005] The purpose of the present invention is to provide a tensile property detection device for high-flexibility drag chain cables in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A tensile property detection device for a highly flexible drag chain cable, including a support plate. On one side of the center of the support plate, there is a mounting plate. On both sides of the mounting plate on the side wall of the support plate, there are fixed top plates, and both of the top plates are equipped with clamping mechanisms. On the side walls of the two clamping mechanisms on the opposite sides, there are fixedly connected connecting blocks. One of the connecting blocks is equipped with a heating mechanism, and the other connecting block is equipped with a heat measurement mechanism. At the lower end of the side wall of the support plate, there is a fixed mounting plate, and the mounting plate is equipped with a gas supply mechanism and a triggering mechanism. The triggering mechanism is communicated with the gas supply mechanism. On the side wall of the support plate, there is a temperature control mechanism communicated with the gas supply mechanism. On the side wall of the mounting plate, there is a pressure application and stretching mechanism. On the side wall of the support plate, there is a driving component, and the driving component is used to drive the movement of the mounting plate. At the lower end of the side wall of the support plate, there is a fixed mounting controller.

[0007] Preferably, both of the clamping mechanisms include side plates fixedly mounted at the bottom of the top plates. On the side wall of the side plates, there are wire clamping holes. The end faces of the top plates and the side plates are jointly fixedly inserted with a secondary electric hydraulic cylinder electrically connected to the controller, and the output end of the secondary electric hydraulic cylinder is inside the wire clamping hole. The output end of the secondary electric hydraulic cylinder is fixedly connected with a wire pressing plate.

[0008] Preferably, the heating mechanism includes a left hollow heat insulation plate mounted on the top of one of the connecting blocks. On the side wall of the left hollow heat insulation plate close to the wire pressing plate on the same side, there is a fixedly inserted heat conduction contact plate. Inside the left hollow heat insulation plate, there is a fixed installation of an electric heating block, and the electric heating block is electrically connected to the controller.

[0009] Preferably, the heat measurement mechanism includes a right hollow heat insulation plate, and the right hollow heat insulation plate is fixedly connected to the connecting block on the side far from the left hollow heat insulation plate. On the side wall of the right hollow heat insulation plate close to the wire pressing plate on the same side, there is a fixedly inserted insulating heat conduction plate, and on the side wall of the insulating heat conduction plate, there is a fixedly connected thermistor strip.

[0010] Preferably, the gas supply mechanism includes an air pump fixedly mounted on the end face of the mounting plate. The suction of the air pump is fixedly connected with a suction pipe. The output end of the air pump is fixedly connected with a delivery pipe. On the pipe wall of the delivery pipe, there is a fixedly communicated branch delivery pipe, and inside the delivery pipe, above the branch delivery pipe, there is a normally open solenoid valve electrically connected to the controller. The thermistor strip is electrically connected to the air pump through the controller.

[0011] Preferably, the triggering mechanism includes a fixed block fixedly installed on one side of the end face of the fixed plate. Two circular grooves are formed in the end face of the fixed block. The end of the sub-distribution pipe away from the gas transmission pipe is sealed. A left pipe and a right pipe are fixedly communicated with the pipe wall of the sub-distribution pipe. Both the left pipe and the right pipe are communicated with the corresponding circular grooves. First normally closed solenoid valves are installed inside both the left pipe and the right pipe. Pistons are slidably arranged inside both circular grooves. Springs are fixedly arranged between the two pistons and the bottom of the circular grooves on the same side. Insulating rods are fixedly connected to the tops of both pistons. Conductive blocks are fixedly connected to the side walls on the downward side of both insulating rods. The two conductive blocks are in sliding contact with each other. A retaining frame is fixedly sleeved on the outer side wall of the fixed block. An electromagnetic switch is fixedly installed on the inner wall of the retaining frame. The two conductive blocks are electrically connected to the electromagnetic switch through a controller. Exhaust holes are formed in the groove walls on the opposite sides of the two circular grooves. Second normally closed solenoid valves are installed inside both exhaust holes. The two first normally closed solenoid valves and the two second normally closed solenoid valves are all electrically connected to the controller.

[0012] Preferably, the temperature control mechanism includes a horizontal plate fixedly installed at the lower end of the side wall of the support plate. The horizontal plate is arranged above the gas transmission pipe. The inside of the horizontal plate is hollow. The horizontal plate is communicated with the gas transmission pipe. A plurality of air jet holes are formed in the top of the horizontal plate. An electric heater is arranged inside the horizontal plate. The electric heater is electrically connected to the controller.

[0013] Preferably, the pressurizing and stretching mechanism includes a vertical hole formed in the side wall of the mounting plate. A vertical moving block is slidably arranged inside the vertical hole. A pressurizing roller is rotatably connected to the side wall of the vertical moving block. A main electric hydraulic cylinder electrically connected to the controller is fixedly inserted into the upper hole wall of the vertical hole. The output end of the main electric hydraulic cylinder is fixedly connected to the vertical moving block. Horizontal holes are formed in the side wall of the mounting plate on both sides of the vertical hole. Horizontal moving blocks are slidably connected inside both horizontal holes. Directional rollers are rotatably connected to the side walls of both horizontal moving blocks. Adjusting screws are rotatably arranged inside both horizontal holes. The rod walls of both adjusting screws are threadedly connected to the side walls of the horizontal moving blocks on the same side.

[0014] Preferably, the driving assembly includes two through holes formed in the side wall of the support plate. Reciprocating lead screw assemblies are installed inside both through holes. The two reciprocating lead screw assemblies are jointly driven and connected through a belt assembly. A driving motor is fixedly installed on the side wall of the support plate. The driving motor is drivingly connected to the reciprocating lead screw assembly on the same side. Two groups of driving blocks are fixedly installed on the side wall of the mounting plate. Both groups of driving blocks are drivingly connected to the reciprocating lead screw assembly on the same side.

[0015] Preferably, two fixing grooves are formed in the side wall of the cross plate, electromagnetic push rods are fixedly connected to the bottoms of the two fixing grooves, push blocks are fixedly connected to the output ends of the two electromagnetic push rods, and a push plate is fixedly connected by the two push blocks. The push plate is arranged directly below the air jet holes, and the electric heater is fixed to the bottom of the push plate.

[0016] Compared with the existing technology, the advantages of a tensile property detection device for a highly flexible drag chain cable are as follows:

[0017] 1. By the mutual cooperation of the support plate, mounting plate, top plate, clamping mechanism, connecting block, heating mechanism, pressure stretching mechanism and controller, an ultimate tensile force can be applied to the drag chain cable, and before applying the tensile force, the drag chain cable can be heated to simulate and detect the tensile property of the drag chain cable when it works and generates heat, making the detection result more in line with the actual situation.

[0018] 2. Through the mutual cooperation of the heat detection mechanism, fixing plate, air supply mechanism and triggering mechanism, it is possible to quickly detect whether the conductor and insulating outer skin of the drag chain cable are damaged according to the change in the thermal conductivity of the drag chain cable before and after applying the tensile force, greatly reducing the detection difficulty of the tensile damage of the drag chain cable.

[0019] 3. Through the mutual cooperation of the temperature control mechanism, fixing groove, electromagnetic push rod, push block and push plate, not only can the drag chain cable be kept warm during the tensile test of the drag chain cable to prevent heat loss from affecting the accuracy of detecting the tensile property of the drag chain cable, but also intermittent air flow can be sprayed on the drag chain cable to make it vibrate, thereby simulating the tensile property of the drag chain cable in a vibrating environment and making the detection result more in line with the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0021] Figure 2 is a top view structural diagram of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0022] Figure 3 is an internal structural diagram of the left hollow heat insulation plate of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0023] Figure 4 is an internal structural diagram of the right hollow heat insulation plate of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0024] Figure 5 is a connection structural diagram of the air supply mechanism and the triggering mechanism of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0025] Figure 6 It is a schematic internal structure diagram of a cross plate of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0026] Figure 7 It is a schematic structural diagram of a pressurized stretching mechanism of a tensile property detection device for a highly flexible drag chain cable provided by the present invention;

[0027] Figure 8 It is a schematic side internal structure diagram of a cross plate of a tensile property detection device for a highly flexible drag chain cable provided by the present invention.

[0028] In the figure: 1 support plate, 2 mounting plate, 3 top plate, 4 clamping mechanism, 41 side plate, 42 wire clamping hole, 43 auxiliary electric hydraulic cylinder, 44 wire pressing plate, 5 connecting block, 6 heating mechanism, 61 left hollow heat insulation plate, 62 heat conduction contact plate, 63 electric heating block, 7 heat measurement mechanism, 71 right hollow heat insulation plate, 72 insulating heat conduction plate, 73 thermistor strip, 8 fixing plate, 9 air supply mechanism, 91 air pump, 92 suction pipe, 93 air delivery pipe, 94 sub-air delivery pipe, 95 normally open solenoid valve, 10 triggering mechanism, 101 fixing block, 102 circular groove, 103 left pipe, 104 right pipe, 105 first normally closed solenoid valve, 106 piston, 107 spring, 108 insulating rod, 109 conductive block, 11 temperature control mechanism, 111 cross plate, 112 air jet hole, 113 electric heater, 12 pressurized stretching mechanism, 121 vertical hole, 122 vertical moving block, 123 pressurizing roller, 124 main electric hydraulic cylinder, 125 horizontal hole, 126 horizontal moving block, 127 adjusting screw, 128 guiding roller, 13 driving assembly, 131 through hole, 132 reciprocating lead screw assembly, 133 belt assembly, 134 driving motor, 135 driving block, 14 controller, 15 retaining frame, 16 electromagnetic switch, 17 exhaust hole, 18 second normally closed solenoid valve, 19 fixing groove, 20 electromagnetic push rod, 21 pushing block, 22 pushing plate. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Such as Figures 1-8As shown in the figure, a tensile property detection device for a highly flexible drag chain cable includes a support plate 1. On one side of the center of the support plate 1, there is a mounting plate 2. On both sides of the mounting plate 2 on the side wall of the support plate 1, there are fixed top plates 3 installed. And two clamping mechanisms 4 are installed on both top plates 3. Each of the two clamping mechanisms 4 includes a side plate 41 fixedly installed at the bottom of the top plate 3. A wire clamping hole 42 is formed on the side wall of the side plate 41. The end faces of the top plate 3 and the side plate 41 are jointly fixedly inserted with a sub-electric hydraulic cylinder 43 electrically connected to the controller 14. And the output end of the sub-electric hydraulic cylinder 43 is inside the wire clamping hole 42. The output end of the sub-electric hydraulic cylinder 43 is fixedly connected with a wire pressing plate 44.

[0031] On the side walls of the two clamping mechanisms 4 on the opposite sides, there are fixedly connected connection blocks 5. A heating mechanism 6 is installed on one of the connection blocks 5. The heating mechanism 6 includes a left hollow heat insulation plate 61 installed on the top of one of the connection blocks 5. And on the side wall of the left hollow heat insulation plate 61 close to the wire pressing plate 44 on the same side, there is fixedly inserted a heat conduction contact plate 62. An electric heating block 63 is fixedly installed inside the left hollow heat insulation plate 61. And the electric heating block 63 is electrically connected to the controller 14. The heating temperature of the electric heating block 63 is 60°C ± 1°C.

[0032] A heat measurement mechanism 7 is installed on the other connection block 5. The heat measurement mechanism 7 includes a right hollow heat insulation plate 71. And the right hollow heat insulation plate 71 is fixedly connected to the connection block 5 on the side far from the left hollow heat insulation plate 61. On the side wall of the right hollow heat insulation plate 71 close to the wire pressing plate 44 on the same side, there is fixedly inserted an insulating heat conduction plate 72. And on the side wall of the insulating heat conduction plate 72, there is fixedly connected a thermistor strip 73. The effective temperature detected by the thermistor strip 73 is from 0°C to 100°C. In this temperature range, after the temperature received by the thermistor strip 73 rises, its own resistance decreases.

[0033] At the lower end of the side wall of the support plate 1, there is fixedly installed a fixing plate 8. And the fixing plate 8 is provided with a gas supply mechanism 9 and a triggering mechanism 10. The triggering mechanism 10 is communicated with the gas supply mechanism 9. The gas supply mechanism 9 includes an air pump 91 fixedly installed on the end face of the fixing plate 8. And the suction port of the air pump 91 is fixedly connected with a suction pipe 92. The output end of the air pump 91 is fixedly connected with a delivery pipe 93. A branch delivery pipe 94 is fixedly communicated with the pipe wall of the delivery pipe 93. And a normally open solenoid valve 95 electrically connected to the controller 14 is installed at the position above the branch delivery pipe 94 inside the delivery pipe 93. The thermistor strip 73 is electrically connected to the air pump 91 through the controller 14. When the air pump 91 works, it can suck external air through the suction pipe 92 and output it through the delivery pipe 93.

[0034] The triggering mechanism 10 includes a fixed block 101 fixedly installed on one side of the end face of the fixed plate 8. Two circular grooves 102 are provided on the end face of the fixed block 101. One end of the distribution pipe 94 far from the gas transmission pipe 93 is sealed. A left pipe 103 and a right pipe 104 are fixedly communicated with the pipe wall of the distribution pipe 94. Both the left pipe 103 and the right pipe 104 are communicated with the corresponding circular grooves 102. First normally closed solenoid valves 105 are installed inside both the left pipe 103 and the right pipe 104. Pistons 106 are slidably arranged inside the two circular grooves 102. Springs 107 are fixedly arranged between the two pistons 106 and the bottom of the same-side circular grooves 102. Insulating rods 108 are fixedly connected to the tops of the two pistons 106. Conductive blocks 109 are fixedly connected to the side walls of the downward sides of the two insulating rods 108. The two conductive blocks 109 are in sliding contact with each other. A retaining frame 15 is fixedly sleeved on the outer side wall of the fixed block 101. An electromagnetic switch 16 is fixedly installed on the inner wall of the retaining frame 15. The two conductive blocks 109 are electrically connected to the electromagnetic switch 16 through a controller 14. Exhaust holes 17 are provided on the groove walls on the opposite sides of the two circular grooves 102. Second normally closed solenoid valves 18 are installed inside the two exhaust holes 17. The two first normally closed solenoid valves 105 and the two second normally closed solenoid valves 18 are both electrically connected to the controller 14. After the electromagnetic switch 16 is powered on, the electromagnetic block inside it will generate magnetic suction force, thereby attracting the moving contact of itself. After power-off, under the action of the elastic piece inside it, the moving contact will disconnect.

[0035] A temperature control mechanism 11 communicated with the air supply mechanism 9 is installed on the side wall of the support plate 1. The temperature control mechanism 11 includes a cross plate 111 fixedly installed at the lower end of the side wall of the support plate 1. The cross plate 111 is arranged above the gas transmission pipe 93. The inside of the cross plate 111 is hollow. The cross plate 111 is communicated with the gas transmission pipe 93. A plurality of air injection holes 112 are provided on the top of the cross plate 111. An electric heater 113 is arranged inside the cross plate 111. The electric heater 113 is electrically connected to the controller 14. The heating temperature of the electric heater 113 is 70°C ± 5°C.

[0036] Two fixing grooves 19 are provided on the side wall of the cross plate 111. Electromagnetic push rods 20 are fixedly connected to the bottoms of the two fixing grooves 19. The output ends of the two electromagnetic push rods 20 are fixedly connected with pushing blocks 21. A pushing plate 22 is fixedly connected by the two pushing blocks 21. The pushing plate 22 is arranged directly below the air injection holes 112. The electric heater 113 is fixed to the bottom of the pushing plate 22. The electromagnetic push rod 20 includes components such as a cylinder part, a telescopic rod part, a permanent magnet, an electromagnetic part, and an elastic element. After the electromagnetic part is powered on, under the action of the same-sex repulsion, it will push the permanent magnet to drive the telescopic rod part to eject. This is a mature existing technology, so it will not be elaborated here.

[0037] The side wall of the mounting plate 2 is provided with a pressurizing and stretching mechanism 12, which includes a vertical hole 121 opened on the side wall of the mounting plate 2, and a vertical block 122 is slidably provided inside the vertical hole 121, and a pressurizing roller 123 is rotatably connected to the side wall of the vertical block 122, and a main electric hydraulic cylinder 124 electrically connected to the controller 14 is fixedly plugged into the upper hole wall of the vertical hole 121, and the output end of the main electric hydraulic cylinder 124 is fixedly connected to the vertical block 122, and the side wall of the mounting plate 2 is provided with horizontal holes at positions on both sides of the vertical hole 121. 125, and the interiors of the two transverse holes 125 are slidably connected with transverse blocks 126, the side walls of the two transverse blocks 126 are rotatably connected with directional rollers 128, and the interiors of the two transverse holes 125 are rotatably provided with adjusting screws 127, and the rod walls of the two adjusting screws 127 are threadedly connected with the side walls of the transverse blocks 126 on the same side. By twisting the adjusting screws 127, the transverse blocks 126 can be driven to move horizontally, so that the distance between the directional rollers 128 and the pressure roller 123 can be adjusted, which is suitable for drag chain cables with different diameters.

[0038] A driving assembly 13 is installed on the side wall of the support plate 1, and the driving assembly 13 is used to drive the mounting plate 2 to move. A controller 14 is fixedly installed on the lower end of the side wall of the support plate 1. The driving assembly 13 includes two through holes 131 opened on the side wall of the support plate 1, and reciprocating screw rod assemblies 132 are installed inside the two through holes 131. The two reciprocating screw rod assemblies 132 are connected together through a belt assembly 133. A driving motor 134 is fixedly installed on the side wall of the support plate 1, and the driving motor 134 is connected to the reciprocating screw rod assembly 132 on the same side. Next, two sets of drive blocks 135 are fixedly installed on the side wall of the mounting plate 2, and the two sets of drive blocks 135 are both connected to the reciprocating screw assembly 132 on the same side. The reciprocating screw assembly 132 includes a reciprocating screw, a screw nut, a bearing and other components. The drive block 135 is installed on the screw nut. Under the rotation of the reciprocating screw, the screw nut can move back and forth laterally along the reciprocating screw. The belt assembly 133 includes belts, pulleys and other components, which can effectively make the two reciprocating screws rotate synchronously in the same direction. This is an existing mature technology, so it will not be elaborated here.

[0039] The operating principle of the present invention is described as follows: insert the two ends of the towline cable sample (length of 1 meter) to be tested into the two clamping holes 42 respectively, and control the two auxiliary electric hydraulic cylinders 43 to work through the controller 14, the auxiliary electric hydraulic cylinder 43 can drive the wire pressing plate 44 to move downward, so that the towline cable can be clamped and fixed. When installing the towline cable, the towline cable needs to be placed above the two directional rollers 128 and below the pressure roller 123, and one end of the towline cable needs to be in contact with the heat-conducting contact plate 62 and the other end with the insulating heat-conducting plate 72. Then, press the start button on the controller 14 to perform a tensile test on the towline cable.

[0040] After the start button of the controller 14 is pressed, the controller 14 will control the electric heating block 63 to work regularly for 2 minutes to heat one end of the drag chain cable, and the heating temperature is 60°C ± 1°C. The heat generated by the electric heating block 63 will be conducted to one end of the insulating heat-conducting plate 72 through the drag chain cable. After the electric heating block 63 has worked for 1 minute and 40 seconds, the controller 14 will connect the loop of the thermistor strip 73 and the air pump 91, and at the same time control the normally open solenoid valve 95 and the first normally closed solenoid valve 105 inside the left pipe 103 to work. At this time, the air pump 91 will send air into the circular groove 102 communicated with the left pipe 103 through the air delivery pipe 93, the sub-air delivery pipe 94 and the left pipe 103. Since the heat is conducted to the thermistor strip 73, the temperature at the thermistor strip 73 will rise, thereby reducing the resistance of the thermistor strip 73. At this time, the resistance of the connection loop between the air pump 91 and the thermistor strip 73 decreases. Therefore, the output power of the air pump 91 becomes higher, and the air sent by the air pump 91 into the circular groove 102 communicated with the left pipe 103 will push the piston 106 and the insulating rod 108 on the same side to drive the conductive block 109 on the same side to move upward. After the electric heating block 63 finishes working regularly, the controller 14 controls the air pump 91 to stop working, and controls the normally open solenoid valve 95 and the first normally closed solenoid valve 105 inside the left pipe 103 to cut off the power supply;

[0041] Subsequently, the controller 14 controls the main electric hydraulic cylinder 124 to work regularly (this regular time can be set according to the maximum tensile force designed for different drag chain cables. For example, if the set limit tensile force value of this drag chain cable is 100N, the regular working time of the main electric hydraulic cylinder 124 is 5 seconds). The main electric hydraulic cylinder 124 can drive the pressure roller 123 to move downward through the vertical moving block 122, so as to press down the drag chain cable. Under the action of the pressure, the drag chain cable is stretched and straightened, so that the limit tensile force can be applied to the drag chain cable. Subsequently, the controller 14 controls the drive motor 134 to work. Under the combined driving action of the reciprocating screw rod assembly 132 and the belt assembly 133, the drive motor 134 can drive the mounting plate 2 to move towards one end of the insulating heat-conducting plate 72 through the drive block 135 (when detecting initially, the mounting plate 2 is located at one end of the heat-conducting contact plate 62). Since the mounting plate 2 moves horizontally, and the main electric hydraulic cylinder 124 applies the limit tensile force to the drag chain cable with the pressure roller 123, the tensile properties of each position of the drag chain cable under the bending condition can be detected. And because the drag chain cable has been heated by the electric heating block 63, the tensile properties of the drag chain cable under the working heating condition can be simulated, and the detection result is more in line with the actual situation;

[0042] When the controller 14 starts the main electric hydraulic cylinder 124, the controller 14 will control the air pump 91 to start working again, and at the same time control the electric heater 113 to start working again. The electric heater 113 can heat the air inside the cross plate 111, and the heating temperature is 70°C ± 5°C. The air pump 91 can spray the air heated by the electric heater 113 through the air injection holes 112 to the drag chain cable through the air delivery pipe 93. In this way, it can ensure that the drag chain cable remains at a high temperature during the tensile test, avoiding the influence of heat loss of the drag chain cable on the accuracy of the tensile performance test. Secondly, after the controller 14 starts the electric heater 113, it will synchronously control the two electromagnetic push rods 20 to work intermittently. The two electromagnetic push rods 20 are powered on once every 2 seconds, and the single power-on time is 2 seconds. When the electromagnetic push rod 20 is powered on, it will move the push plate 22 through the push block 21. At this time, the push plate 22 will move away from directly below the air injection hole 112. Therefore, the air conveyed by the air pump 91 will quickly spray out from the air injection hole 112. When the sprayed air flow impacts the drag chain cable, it can not only heat and keep warm the drag chain cable, but also make the drag chain cable vibrate by using the impact force of the air flow. When the electromagnetic push rod 20 is powered off, the push plate 22 moves back to below the air injection hole 112. At this time, due to the blocking of the air injection hole 112 by the push plate 22, the air conveyed by the air pump 91 cannot be sprayed out through the air injection hole 112 in time. Therefore, the air pressure inside the cross plate 111 rises rapidly, and the air will be fully heated by the electric heater 113 until the next time the push plate 22 moves away from directly below the air injection hole 112, and these high-temperature and high-pressure air will spray out through the air injection hole 112 again;

[0043] After the drive motor 134 works for 3 minutes, the mounting plate 2 moves from one end of the heat-conducting contact plate 62 to one end of the insulating heat-conducting plate 72. At this time, the controller 14 controls the drive motor 134 to stop working. Subsequently, the controller 14 controls the electric heater 113 to stop working and controls the two electromagnetic push rods 20 to be continuously powered on. At this time, the air delivered by the air pump 91 will continuously and stably spray out through the air holes 112. Since the electric heater 113 has stopped working, under the action of the unheated air flow delivered by the air pump 91, the drag chain cable will be quickly cooled to room temperature. After the controller 14 controls the electric heater 113 to stop working for 2 minutes, the controller 14 controls the air pump 91 and the electromagnetic push rods 20 to stop working. Subsequently, the air pump 91 controls the electric heating block 63 to work regularly for 2 minutes again, and the heating temperature is the same as the initial heating temperature. And after the controller 14 starts the electric heating block 63 to work for 1 minute and 40 seconds, the controller 14 will reconnect the connection circuit between the thermistor strip 73 and the air pump 91. At the same time, the controller 14 controls the normally open solenoid valve 95 and the first normally closed solenoid valve 105 inside the right pipe 104 to work. At this time, the air pump 91 will deliver air into the circular groove 102 communicated with the right pipe 104 through the air delivery pipe 93, the sub-air delivery pipe 94 and the right pipe 104. At this time, the air inside the circular groove 102 communicated with the right pipe 104 will push the piston 106 and the insulating rod 108 on the same side to drive the conductive block 109 on the same side to move upward. After the electric heating block 63 works regularly and ends, the controller 14 controls the air pump 91 to stop working and controls the normally open solenoid valve 95 and the first normally closed solenoid valve 105 inside the right pipe 104 to be powered off. If the tensile property of the drag chain cable is good, under the ultimate tensile force, the conductor and the insulating outer skin of the drag chain cable do not show the phenomena of fracture and excessive stretching, then before and after applying the tensile force to the drag chain cable, the thermal conductivity of the drag chain cable will not change excessively. At this time, the difference in the air volume delivered into the two circular grooves 102 is small, resulting in a small difference in the height of the two insulating rods 108 driving the conductive blocks 109 to move upward, so that the two conductive blocks 109 will not be separated. On the contrary, if the conductor and the insulating outer skin of the drag chain cable show the phenomena of fracture and excessive stretching, when the heat is transferred to the fracture of the conductor or the insulating outer skin, the heat will be blocked, resulting in less heat being conducted to the thermistor strip 73 in the same time. And excessive stretching will cause the heat conduction distance to become longer and the effective area of heat conduction to shrink, which will also cause less heat to be conducted to the thermistor strip 73 in the same time. Therefore, due to the temperature difference of the thermistor strip 73 before and after, the output power of the air pump 91 differs greatly, resulting in a large difference in the air volume delivered into the two circular grooves 102, and further resulting in a large difference in the height of the two insulating rods 108 moving upward, so that the two conductive blocks 109 are separated. After the controller 14 controls the first normally closed solenoid valve 105 inside the right pipe 104 to be powered off, the controller 14 will connect the connection circuit between the two conductive blocks 109 and the electromagnetic switch 16. If the two conductive blocks 109 are not separated,Then the connection circuit between the electromagnetic switch 16 and the conductive block 109 is turned on. At this time, the moving contact of the electromagnetic switch 16 will be magnetically attracted and closed. After the controller 14 receives the closing electrical signal of the electromagnetic switch 16, it will not control its own alarm module (the alarm module can adopt a buzzer, an audible and visual alarm, etc.) to work. On the contrary, if the two conductive blocks 109 are separated, the connection circuit between the electromagnetic switch 16 and the conductive block 109 is disconnected. At this time, the moving contact of the electromagnetic switch 16 will not be magnetically attracted and closed, resulting in the controller 14 being unable to receive the electrical signal of the electromagnetic switch 16. After 5 seconds, the controller 14 will control its own alarm module to start alarm work. After the staff receives the alarm signal of the controller 14, they can know that the tensile performance of the drag chain cable is unqualified. 6 seconds after the controller 14 connects the connection circuit between the conductive block 109 and the electromagnetic switch 16, the controller 14 will control the second normally closed solenoid valves 18 inside the two exhaust holes 17 to work regularly for 20 seconds to discharge the excess air inside the two circular grooves 102, avoiding affecting the next detection. At the same time, the controller 14 will control the main electric push rod to perform a timed return stroke work to move the pressure roller 123 back to its reset position, and control the drive motor 134 to continue working for 3 minutes to move the mounting plate 2 back to one side of the heat conduction contact plate 62 for the next detection. Subsequently, the staff can control the two auxiliary electric hydraulic cylinders 43 to perform a return stroke work through the controller 14, and then remove the drag chain cable.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tensile strength detection device for a highly flexible drag chain cable, comprising a support plate (1), characterized in that: A mounting plate (2) is provided at one side of the center of the support plate (1); top plates (3) are fixedly mounted on the side walls of the support plate (1) at positions on both sides of the mounting plate (2); and the two top plates (3) are both mounted with clamping mechanisms (4); the side walls on the opposite sides of the two clamping mechanisms (4) are both fixedly connected with connecting blocks (5); one of the connecting blocks (5) is mounted with a heating mechanism (6); and the other connecting block (5) is mounted with a heat measuring mechanism (7); the heat measuring mechanism (7) comprises a thermistor strip (73); and the lower end of the side wall of the support plate (1) is fixedly mounted with a heating mechanism (6); and the other connecting block (5) is fixedly mounted with a heating mechanism (7) comprising a thermistor strip (73). A fixing plate (8) is installed, and the fixing plate (8) is installed with an air supply mechanism (9) and a trigger mechanism (10), the trigger mechanism (10) is connected to the air supply mechanism (9), the side wall of the support plate (1) is installed with a temperature control mechanism (11) connected to the air supply mechanism (9), the side wall of the mounting plate (2) is installed with a pressurizing and stretching mechanism (12), the side wall of the support plate (1) is installed with a driving component (13), and the driving component (13) is used to drive the mounting plate (2) to move, and a controller (14) is fixedly installed at the lower end of the side wall of the support plate (1); The air supply mechanism (9) comprises an air pump (91) fixedly mounted on the end surface of the fixed plate (8), and the suction end of the air pump (91) is fixedly connected to an air intake pipe (92), the output end of the air pump (91) is fixedly connected to an air delivery pipe (93), the wall of the air delivery pipe (93) is fixedly connected to a branch delivery pipe (94), and a normally open solenoid valve (95) electrically connected to a controller (14) is installed inside the air delivery pipe (93) at a position above the branch delivery pipe (94), and the thermistor strip (73) is electrically connected to the air pump (91) via the controller (14); The trigger mechanism (10) comprises a fixed block (101) fixedly mounted on one side of the end surface of the fixed plate (8), and the end surface of the fixed block (101) is provided with two circular grooves (102); the end of the distribution pipe (94) away from the gas supply pipe (93) is sealed, and a left pipe (103) and a right pipe (104) are fixedly connected to the pipe wall of the distribution pipe (94), and the left pipe (103) and the right pipe (104) are both connected to the corresponding circular grooves (102); a first normally closed solenoid valve (105) is installed inside the left pipe (103) and the right pipe (104); a piston (106) is slidably provided inside the two circular grooves (102), and a spring (107) is fixedly provided between the two pistons (106) and the bottom of the circular groove (102) on the same side; the two movable The top of the plug (106) is fixedly connected to an insulating rod (108), and the side walls on the lower side of the two insulating rods (108) are fixedly connected to a conductive block (109), the two conductive blocks (109) are in sliding contact with each other, the outer wall of the fixed block (101) is fixedly sleeved with a baffle frame (15), and the inner wall of the baffle frame (15) is fixedly installed with an electromagnetic switch (16), the two conductive blocks (109) are electrically connected to the electromagnetic switch (16) through a controller (14), the groove walls on the opposite sides of the two circular grooves (102) are provided with exhaust holes (17), and the insides of the two exhaust holes (17) are installed with second normally closed electromagnetic valves (18), and the two first normally closed electromagnetic valves (105) and the two second normally closed electromagnetic valves (18) are electrically connected to the controller (14); The temperature control mechanism (11) comprises a horizontal plate (111) fixedly mounted on the lower end of the side wall of the support plate (1), and the horizontal plate (111) is arranged above the gas supply pipe (93), the interior of the horizontal plate (111) is hollow, the horizontal plate (111) is connected to the gas supply pipe (93), a plurality of air injection holes (112) are provided on the top of the horizontal plate (111), an electric heater (113) is provided inside the horizontal plate (111), and the electric heater (113) is electrically connected to the controller (14); The side wall of the transverse plate (111) is provided with two fixed grooves (19), and the groove bottoms of the two fixed grooves (19) are fixedly connected to electromagnetic push rods (20), the output ends of the two electromagnetic push rods (20) are fixedly connected to push blocks (21), and the two push blocks (21) are commonly fixedly connected to a push plate (22), the push plate (22) is arranged directly below the air injection hole (112), and the electric heater (113) is fixed to the bottom of the push plate (22).

2. A tensile strength detection device for a highly flexible drag chain cable according to claim 1, characterized in that: The two clamping mechanisms (4) each comprise a side plate (41) fixedly mounted on the bottom of the top plate (3), a wire clamping hole (42) being provided on a side wall of the side plate (41), a secondary electric hydraulic cylinder (43) electrically connected to a controller (14) being fixedly plugged into the end surfaces of the top plate (3) and the side plate (41), and an output end of the secondary electric hydraulic cylinder (43) being located inside the wire clamping hole (42), and a wire pressing plate (44) being fixedly connected to the output end of the secondary electric hydraulic cylinder (43).

3. A tensile strength detection device for a highly flexible drag chain cable according to claim 2, characterized in that: The heating mechanism (6) comprises a left hollow heat insulation board (61) installed on the top of one of the connection blocks (5), and a heat-conducting contact board (62) is fixedly plugged into the side wall of the left hollow heat insulation board (61) close to the same-side pressure wire board (44), and an electric heating block (63) is fixedly installed inside the left hollow heat insulation board (61), and the electric heating block (63) is electrically connected to the controller (14).

4. A tensile strength detection device for a highly flexible drag chain cable according to claim 3, characterized in that: The heat measuring mechanism (7) comprises a right hollow heat insulation board (71), and the right hollow heat insulation board (71) is fixedly connected to a connection block (5) on a side away from the left hollow heat insulation board (61), and an insulating heat conducting board (72) is fixedly inserted into a side wall of the right hollow heat insulation board (71) on a side close to the pressure wire board (44) on the same side, and a thermistor strip (73) is fixedly connected to the side wall of the insulating heat conducting board (72).

5. The tensile strength detection device for a highly flexible drag chain cable according to claim 1, characterized in that: The pressurizing and stretching mechanism (12) comprises a vertical hole (121) formed on a side wall of the mounting plate (2), a vertical moving block (122) being slidably disposed inside the vertical hole (121), a pressurizing roller (123) being rotatably connected to the side wall of the vertical moving block (122), a main electric hydraulic cylinder (124) electrically connected to the controller (14) being fixedly plugged into the upper hole wall of the vertical hole (121), and an output end of the main electric hydraulic cylinder (124) being fixedly connected to the vertical moving block (122). The side walls of the mounting plate (2) are provided with transverse holes (125) at positions on both sides of the vertical hole (121), and the interiors of the two transverse holes (125) are slidably connected to transverse blocks (126), the side walls of the two transverse blocks (126) are rotatably connected to directional rollers (128), and the interiors of the two transverse holes (125) are rotatably provided with adjustment screws (127), and the rod walls of the two adjustment screws (127) are threadedly connected to the side walls of the transverse blocks (126) on the same side.

6. The tensile strength detection device for a highly flexible drag chain cable according to claim 1, characterized in that: The driving assembly (13) comprises two through holes (131) formed on the side wall of the support plate (1), and a reciprocating screw assembly (132) is installed inside the two through holes (131), and the two reciprocating screw assemblies (132) are connected in transmission via a belt assembly (133); a driving motor (134) is fixedly installed on the side wall of the support plate (1), and the driving motor (134) is connected in transmission to the reciprocating screw assembly (132) on the same side; two sets of driving blocks (135) are fixedly installed on the side wall of the mounting plate (2), and the two sets of driving blocks (135) are connected in transmission to the reciprocating screw assembly (132) on the same side.

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