Heating cable thermal safety detection test device and detection method

Abstract

The invention relates to the technical field of cable detection equipment, in particular to a heating cable thermal safety detection test device and a detection method.The heating cable thermal safety detection test device comprises a detection table, a control panel, a refrigerator and a heater, the refrigerator and the heater are electrically connected to the control panel, a detection plate is slidably arranged on the detection table, and a driving assembly is arranged on the detection table; the driving assembly is used for driving the detection plate to slide back and forth in the direction from the refrigerator to the heater, a lifting plate is vertically arranged on the detection plate in a sliding mode, a bunching piece is arranged on the lifting plate and used for fixing a cable to be detected to the lifting plate, and a lifting piece is arranged on the detection plate and used for driving the lifting plate to be close to the refrigerator or the heater. A wiring switch electrically connected to the control panel is arranged on the detection plate; and an electrified wire is connected between the wiring switch and the end part of the cable to be detected on the lifting plate. The method has the effect of improving the accuracy of the thermal stability detection result of the to-be-detected cable at the extreme temperature.

Description

Technical Field

[0001] The present application relates to the technical field of cable detection equipment, and in particular to a heating cable thermal safety detection test device and detection method. Background Art

[0002] Heating cable is a device that converts electrical energy into thermal energy. It is mainly used for heating daily life, plant cultivation, pipe insulation and other occasions.

[0003] At present, with the widespread application of electric heating systems in industrial and civil buildings, the safety and reliability of heating cables have become the focus of attention.

[0004] Existing cable testing equipment mainly focuses on electrical performance inspections, such as insulation performance and conductivity, but lacks testing of thermal stability of cables in extreme temperature environments. This leads to frequent failures caused by geographical and seasonal temperature differences in actual use, which brings great economic losses and even safety hazards to users. Therefore, it is of great significance to develop a set of test equipment that can comprehensively evaluate the performance of heating cables in high and low temperature environments. Summary of the invention

[0005] In order to comprehensively evaluate the thermal stability index of a heating cable in high and low temperature environments, the present application provides a heating cable thermal safety detection test device and detection method.

[0006] In the first aspect, the present application provides a heating cable thermal safety detection test device, which adopts the following technical solution: A heating cable thermal safety detection test device comprises a detection platform, a control panel, a refrigerator and a heater, the refrigerator and the heater are both electrically connected to the control panel, a detection plate is slidably arranged on the detection platform, a driving assembly is arranged on the detection platform, the driving assembly is used to drive the detection plate to slide back and forth from the refrigerator to the heater, a lifting plate is vertically slidably arranged on the detection plate, a wire harness is arranged on the lifting plate, the wire harness is used to fix the cable to be tested on the lifting plate, a lifting member is arranged on the detection plate, the lifting member is used to drive the lifting plate close to the refrigerator or the heater, a wiring switch electrically connected to the control panel is arranged on the detection plate, and an energized wire is connected between the wiring switch and the end of the cable to be tested on the lifting plate.

[0007] By adopting the above technical solution, the worker first fixes the cable to be tested on the lifting plate through the wire harness, and then connects the wiring switch to the end of the cable to be tested through the energized wire to form a closed loop. After that, the worker inputs the temperature change of the refrigerator and the heater, the working time at the corresponding temperature, and the number of repetitions of the cable to be tested in the low-temperature and high-temperature environments on the control panel. Then, the driving component first drives the detection plate to move to the bottom of the refrigerator, and then the lifting component drives the cable to be tested on the lifting plate to stick to the bottom of the refrigerator. After that, the control panel powers on the cable to be tested and constantly records the changes in the thermal stability index of the cable to be tested over time when the cable to be tested is in low-temperature environments at different temperatures. Trend chart. After a period of time, the lifting member drives the lifting plate away from the refrigerator. At the same time, the driving component drives the detection plate to move to the bottom of the heater, and the lifting member is used to make the energized cable to be tested stick to the bottom of the heater. At this time, the control panel constantly records the trend chart of the thermal stability index of the cable to be tested changing with time when the cable to be tested is in a high-temperature environment with different temperatures. Finally, the detection process of the refrigerator and the heater is repeated in sequence until the number of detections of the cable to be tested reaches the designed number of repetitions, thereby completing the thermal stability test of the cable to be tested in an extreme temperature environment, and obtaining the conductivity decay index of the cable to be tested that changes with temperature, thereby improving the accuracy of the thermal stability test results of the cable to be tested.

[0008] Optionally, the driving assembly includes a guide rod arranged on the detection platform, the guide rod is located directly below the refrigerator and the heater, the detection plate is slidably mounted on the guide rod, synchronous wheels are rotatably arranged on the detection platform and at both ends of the guide rod, a synchronous belt is commonly wound around the two synchronous wheels, a connecting bridge plate is arranged on the detection plate, the connecting bridge plate is arranged on the synchronous belt, a reciprocating motor electrically connected to the control panel is arranged on the detection platform, and one of the synchronous wheels is coaxially arranged on the output shaft of the reciprocating motor.

[0009] By adopting the above technical solution, the control panel starts the reciprocating motor. The reciprocating motor here can adopt a forward and reverse motor. The output shaft of the reciprocating motor drives one of the synchronous wheels to rotate, the synchronous wheel drives the synchronous belt to rotate, and the synchronous belt drives the detection plate to slide through the connecting bridge plate. Under the guidance of the guide rod, the detection plate slides back and forth in the direction from the refrigerator to the heater, thereby realizing the reciprocating detection process of the cable to be tested in low temperature and high temperature environments.

[0010] Optionally, the wiring harness comprises two wiring harness lines arranged on the lifting plate, a plurality of wiring harness holes are opened on the wiring harness lines along the length direction thereof, two ends of the cable to be tested are respectively inserted into the corresponding wiring harness holes on the two wiring harness lines, a pressure cap is threadedly connected to the wiring harness line, the pressure cap corresponds one-to-one to the wiring harness holes, and the pressure cap is used to fix the end of the cable to be tested on the wiring harness hole of the wiring harness line, a plurality of the power-carrying wires are arranged on the wiring switch, the power-carrying wires correspond one-to-one to the wiring harness holes, and the power-carrying wires are used to connect the wiring harness line and the wiring switch.

[0011] By adopting the above technical solution, workers can simultaneously detect multiple cables to be tested by twisting multiple pressure caps, which is beneficial to improving the detection efficiency of the cables to be tested, reducing the cost of detection, and reducing the time and number of manual interventions.

[0012] Optionally, the lifting member includes a lifting cylinder arranged on the detection plate and electrically connected to the control panel, the lifting plate is arranged on the piston rod of the lifting cylinder, and the lifting plate is provided with a plurality of guide columns whose axes are parallel to the axes of the piston rod of the lifting cylinder, and the guide columns slide through the detection plate.

[0013] By adopting the above technical solution, the control panel starts the lifting cylinder, and under the guidance of the guide column, the piston rod of the lifting cylinder pushes the lifting plate to achieve lifting and lowering, so that the cable to be tested is attached to the bottom of the refrigerator or heater, thereby forming a low-temperature or high-temperature environment around the cable to be tested.

[0014] Optionally, a support plate is detachably provided on the detection board and between the two bundle lines, the support plate is provided at both ends of the bundle lines, the cable to be tested is located between the two support plates, and a first proximity switch electrically connected to the control panel is provided on the detection board, and the sensing end of the first proximity switch is used to point to the bottom of the refrigerator or the bottom of the heater.

[0015] By adopting the above technical solution, workers can select support plates of different heights according to the diameter of the cable to be tested, thereby reducing the possibility of the cable to be tested being squeezed and causing inaccurate test results. At the same time, the first proximity switch can reduce the possibility of the support plate causing impact damage to the bottom of the refrigerator or the bottom of the heater.

[0016] Optionally, both ends of the support plate are in contact with the beam line, and sealing strips are provided on the refrigerator and the heater, and the sealing strips are used to seal the gap between the refrigerator and the beam line or the gap between the heater and the beam line.

[0017] By adopting the above technical solution, the sealing strip makes the bundle wire, the support plate and the bottom of the refrigerator form a low-temperature chamber, and the sealing strip makes the bundle wire, the support plate and the bottom of the heater form a high-temperature chamber, so that the cable to be tested is in a stable temperature environment, thereby improving the accuracy of the test results of the cable to be tested at the corresponding temperature.

[0018] Optionally, a positioning plate is provided on the detection board, and a second proximity switch electrically connected to the control panel is provided on the detection table and directly below the refrigerator and the heater, and the sensing ends of the two second proximity switches are both directed to the positioning plate.

[0019] By adopting the above technical solution, when the arrival plate triggers the second proximity switch, the second proximity switch feeds back a signal to the control panel, and the control panel controls the reciprocating motor to stop working and controls the reciprocating motor to change the rotation direction, which is beneficial to control the accuracy of the moving position of the detection plate.

[0020] Optionally, an observation rack is provided on the detection table, and a plurality of transparent observation panels are provided on the observation rack, and the refrigerator and the heater are both located in the observation rack.

[0021] By adopting the above technical solution, it is convenient for external workers to observe the detection status of the cable to be tested at any time.

[0022] In a second aspect, the present application provides a detection method for a heating cable thermal safety detection test device, which adopts the following technical solution: A detection method for a heating cable thermal safety detection test device comprises the following steps: S1. A worker fixes the cable to be tested on the lifting plate through the cable bundle, and then connects the wiring switch to the end of the cable to be tested through the energized wire to form a closed loop; S2. A worker inputs the operating temperature, duration, and number of repetitions of the refrigerator and the heater on the control panel; S3, the driving component first drives the detection plate to move to the bottom of the refrigerator, and then the lifting member drives the cable to be tested on the lifting plate to stick to the bottom of the refrigerator, and then the control panel powers on the cable to be tested and constantly records the change of the thermal stability index of the cable to be tested over time when the cable to be tested is in a low-temperature environment of different temperatures; S4. After a period of time, the lifting member drives the lifting plate away from the refrigerator, and at the same time, the driving assembly drives the detection plate to move to the bottom of the heater, and the energized cable to be tested is attached to the bottom of the heater through the lifting member. At this time, the control panel constantly records the change of the thermal stability index of the cable to be tested over time when the cable to be tested is in a high-temperature environment with different temperatures; S5. Repeat the detection process of the refrigerator and the heater in sequence until the detection times of the cable to be tested reaches the designed repetition times.

[0023] The adoption of the above technical solution is conducive to improving the accuracy of the detection results of the tested cable under different temperature environments.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The worker first fixes the cable to be tested on the lifting plate through the cable harness, and then connects the wiring switch to the end of the cable to be tested through the energized wire to form a closed loop. After that, the worker inputs the temperature change of the refrigerator and the heater, the working time at the corresponding temperature, and the number of repetitions of the cable to be tested in low-temperature and high-temperature environments on the control panel. Then the driving component first drives the detection plate to move directly under the refrigerator, and then the lifting component drives the cable to be tested on the lifting plate to stick to the bottom of the refrigerator. After that, the control panel powers on the cable to be tested and always records the trend of the thermal stability index of the cable to be tested over time when the cable to be tested is in a low-temperature environment with different temperatures. After a period of time, the lifting member drives the lifting plate away from the refrigerator, and the driving assembly drives the detection plate to move to the bottom of the heater, and the energized cable to be tested is attached to the bottom of the heater through the lifting member. At this time, the control panel constantly records the trend of the thermal stability index of the cable to be tested over time when the cable to be tested is in a high-temperature environment with different temperatures. Finally, the detection process of the refrigerator and the heater is repeated in sequence until the number of detections of the cable to be tested reaches the designed number of repetitions, thereby completing the thermal stability detection of the cable to be tested in an extreme temperature environment, and obtaining the conductivity decay index of the cable to be tested that changes with temperature, thereby improving the accuracy of the thermal stability detection result of the cable to be tested; 2. Workers can select support plates of different heights according to the diameter of the cable to be tested, so as to reduce the possibility of inaccurate test results caused by squeezing the cable to be tested. At the same time, the first proximity switch can reduce the possibility of the support plate causing impact damage to the bottom of the refrigerator or the bottom of the heater; 3. The sealing strips make the bundle wires, support plates and the bottom of the refrigerator form a low-temperature chamber, and the sealing strips make the bundle wires, support plates and the bottom of the heater form a high-temperature chamber, so that the cable to be tested is in a stable temperature environment, thereby improving the accuracy of the test results of the cable to be tested at the corresponding temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram used to reflect the positional relationship among the refrigerator, the heater and the guide rod in the embodiment of the present application.

[0027] Figure 3It is a structural schematic diagram used to reflect the positional relationship between the detection plate, the lifting plate and the connecting bridge plate in the embodiment of the present application.

[0028] Explanation of the reference numerals: 0. Cable to be tested; 1. Test bench; 2. Control panel; 3. Refrigerator; 4. Heater; 5. Test board; 6. Drive assembly; 61. Guide rod; 62. Synchronous wheel; 63. Synchronous belt; 64. Connecting bridge plate; 65. Reciprocating motor; 7. Lifting plate; 8. Wire harness; 81. Wire harness line; 82. Wire harness hole; 83. Pressure cap; 9. Lifting member; 91. Lifting electric cylinder; 92. Guide column; 10. Wiring switch; 11. Power-carrying wire; 12. Support plate; 13. First proximity switch; 14. Sealing strip; 15. Arrival plate; 16. Second proximity switch; 17. Observation frame; 18. Transparent observation plate; 19. Universal wheel; 20. Inspection door; 21. Fixing strip. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0030] Example 1 The embodiment of the present application discloses a heating cable thermal safety detection test device.

[0031] Reference Figure 1 A heating cable thermal safety detection test device includes a detection platform 1, a control panel 2, a refrigerator 3 and a heater 4. The refrigerator 3 and the heater 4 are electrically connected to the control panel 2. A plurality of universal wheels 19 are bolted to the bottom of the detection platform 1. An observation frame 17 is welded on the detection platform 1, and the control panel 2 is bolted to the observation frame 17.

[0032] Reference Figure 1 , Figure 2 and Figure 3 A plurality of transparent observation panels 18 are arranged on the observation frame 17, the refrigerator 3 and the heater 4 are both located in the observation frame 17, a plurality of inspection doors 20 are rotatably connected to the observation frame 17, a detection plate 5 is slidably arranged on the detection table 1, and a driving assembly 6 is arranged on the detection table 1, and the driving assembly 6 is used to drive the detection plate 5 to slide back and forth in the direction from the refrigerator 3 to the heater 4.

[0033] Reference Figure 1 , Figure 2 and Figure 3 The driving assembly 6 includes a guide rod 61 arranged on the detection platform 1, and both ends of the guide rod 61 are bolted with fixing strips 21. The guide rod 61 is located directly below the refrigerator 3 and the heater 4. The detection plate 5 is slidably sleeved on the guide rod 61. The detection platform 1 and both ends of the guide rod 61 are rotatably connected with synchronous wheels 62.

[0034] Reference Figure 1 , Figure 2 and Figure 3 A synchronous belt 63 is wound around the two synchronous wheels 62, a connecting bridge plate 64 is bolted to the detection plate 5, and the connecting bridge plate 64 is bolted to the synchronous belt 63. A reciprocating motor 65 electrically connected to the control panel 2 is bolted to the detection table 1. The reciprocating motor 65 can adopt the forward and reverse motor in the prior art, and one of the synchronous wheels 62 is coaxially bolted to the output shaft of the reciprocating motor 65.

[0035] Reference Figure 1 , Figure 2 and Figure 3 A positioning plate 15 is bolted to the detection plate 5 , and second proximity switches 16 electrically connected to the control panel 2 are bolted to the detection table 1 and located directly below the refrigerator 3 and the heater 4 , and the sensing ends of the two second proximity switches 16 both point to the positioning plate 15 .

[0036] The control panel 2 starts the reciprocating motor 65, the output shaft of the reciprocating motor 65 drives one of the synchronous wheels 62 to rotate, the synchronous wheel 62 drives the synchronous belt 63 to rotate, and the synchronous belt 63 drives the detection plate 5 to slide through the connecting bridge plate 64, so that the detection plate 5 slides back and forth in the direction from the refrigerator 3 to the heater 4. When the in-place plate 15 triggers the second proximity switch 16, the second proximity switch 16 feeds back a signal to the control panel 2, and the control panel 2 controls the reciprocating motor 65 to stop working and change the rotation direction.

[0037] Reference Figure 1 , Figure 2 and Figure 3 A lifting plate 7 is vertically slidably arranged on the detection plate 5, and a wire harness 8 is arranged on the lifting plate 7. The wire harness 8 is used to fix the cable 0 to be tested on the lifting plate 7. A lifting member 9 is arranged on the detection plate 5. The lifting member 9 is used to drive the lifting plate 7 to approach the bottom of the refrigerator 3 or the bottom of the heater 4. A wiring switch 10 electrically connected to the control panel 2 is bolted on the detection plate 5, and an energized wire 11 is connected between the wiring switch 10 and the end of the cable 0 to be tested on the lifting plate 7.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The cable harness 8 includes two cable harness lines 81 bolted to the lifting plate 7. The cable harness lines 81 are evenly provided with a plurality of cable harness holes 82 along their length direction. The two ends of the cable 0 to be tested are respectively inserted into the corresponding cable harness holes 82 on the two cable harness lines 81. The cable harness lines 81 are threadedly connected with pressure caps 83.

[0039] Reference Figure 1 , Figure 2 and Figure 3The pressure cap 83 corresponds to the harness hole 82 one by one, and the pressure cap 83 is used to fix the end of the cable 0 to be tested on the harness hole 82 of the harness line 81. A plurality of power-carrying wires 11 are arranged on the wiring switch 10, and the power-carrying wires 11 correspond to the harness holes 82 one by one. The power-carrying wires 11 are used to connect the harness holes 82 on the harness line 81 and the wiring switch 10.

[0040] Reference Figure 1 , Figure 2 and Figure 3 The lifting member 9 includes a lifting cylinder 91 bolted to the bottom of the detection plate 5 and electrically connected to the control panel 2. The lifting plate 7 is bolted to the piston rod of the lifting cylinder 91. A plurality of guide columns 92 whose axes are parallel to the piston rod axes of the lifting cylinder 91 are welded on the lifting plate 7. The guide columns 92 slide through the detection plate 5.

[0041] Reference Figure 1 , Figure 2 and Figure 3 A support plate 12 is bolted on the detection board 5 and located between the two beam lines 81. The support plate 12 is arranged at both ends of the beam line 81. The cable 0 to be tested is located between the two support plates 12. A first proximity switch 13 electrically connected to the control panel 2 is bolted on the detection board 5. The sensing end of the first proximity switch 13 is used to point to the bottom of the refrigerator 3 or the bottom of the heater 4.

[0042] Reference Figure 1 , Figure 2 and Figure 3 Both ends of the support plate 12 are in contact with the beam line 81 , and sealing strips 14 are bolted to the refrigerator 3 and the heater 4 , and the sealing strips 14 are used to seal the gap between the refrigerator 3 and the beam line 81 or the gap between the heater 4 and the beam line 81 .

[0043] The worker first loosens the multiple pressure caps 83 on the cable tie wire 81, and then inserts the two ends of the multiple cables 0 to be tested into the corresponding cable holes 82 of the two cable tie wires 81 in turn, and then tightens the pressure caps 83 to fix the ends of the cables to be tested 0 on the lifting plate 7. At this time, the energized wire 11 connects the wiring switch 10 with the ends of the cables to be tested 0 to form a closed loop.

[0044] According to the design requirements of the cable 0 to be tested, the worker inputs the operating temperature values ​​of the refrigerator 3 and the heater 4, the temperature change, the working time at the corresponding temperature, and the number of repetitions of the cable 0 to be tested in low and high temperature environments on the control panel 2.

[0045] When the detection plate 5 moves to the bottom of the refrigerator 3, and the arrival plate 15 at this time triggers the second proximity switch 16, the reciprocating motor 65 changes the rotation direction and stops working, and then the control panel 2 starts the lifting cylinder 91. Under the guidance of the guide column 92, the piston rod of the lifting cylinder 91 pushes the lifting plate 7 close to the bottom of the refrigerator 3 until the first proximity switch 13 is triggered. At this time, the support plate 12 abuts against the bottom of the refrigerator 3, and the sealing strip 14 seals the gap between the refrigerator 3 and the harness line 81.

[0046] The cable 0 to be tested is placed in a sealed low-temperature environment. The control panel 2 then powers on the cable 0 to be tested and constantly records a trend chart of the thermal stability index of the cable 0 to be tested changing with time when the cable 0 to be tested is in a low-temperature environment of different temperatures.

[0047] After a period of time, the lifting cylinder 91 drives the lifting plate 7 to descend, and at the same time, the reciprocating motor 65 drives the detection plate 5 to move to the bottom of the heater 4 through the synchronous belt 63 and the synchronous wheel 62, and the energized cable to be tested 0 is attached to the bottom of the heater 4 through the lifting cylinder 91. At this time, the control panel 2 constantly records the change trend of the thermal stability index of the cable to be tested 0 over time when the cable to be tested 0 is in a high-temperature environment with different temperatures.

[0048] Finally, the detection process of the refrigerator 3 and the heater 4 is repeated in sequence until the number of repeated detections of the cable 0 to be tested reaches the designed number of repeated detections, thereby obtaining the thermal stability test result of the cable 0 to be tested under the extreme temperature environment.

[0049] The implementation principle of Example 1 is as follows: the worker first loosens the multiple pressure caps 83 on the cable tie wire 81, and then inserts the two ends of the multiple cables 0 to be tested into the cable tie holes 82 corresponding to the two cable tie wires 81 in turn, and then tightens the pressure caps 83 to fix the ends of the cables to be tested 0 on the lifting plate 7. At this time, the energized wire 11 connects the wiring switch 10 with the ends of the cables to be tested 0 to form a closed loop.

[0050] According to the design requirements of the cable 0 to be tested, the worker inputs the operating temperature values ​​of the refrigerator 3 and the heater 4, the temperature change, the working time at the corresponding temperature, and the number of repetitions of the cable 0 to be tested in low and high temperature environments on the control panel 2.

[0051] Then the control panel 2 starts the reciprocating motor 65, the output shaft of the reciprocating motor 65 drives one of the synchronous wheels 62 to rotate, the synchronous wheel 62 drives the synchronous belt 63 to rotate, the synchronous belt 63 drives the detection plate 5 to slide through the connecting bridge plate 64, so that the detection plate 5 slides back and forth from the refrigerator 3 to the heater 4, when the in-place plate 15 triggers the second proximity switch 16, the second proximity switch 16 feeds back a signal to the control panel 2, and the control panel 2 controls the reciprocating motor 65 to stop working and change the rotation direction.

[0052] When the detection plate 5 moves to the bottom of the refrigerator 3, and the arrival plate 15 at this time triggers the second proximity switch 16, the reciprocating motor 65 changes the rotation direction and stops working, and then the control panel 2 starts the lifting cylinder 91. Under the guidance of the guide column 92, the piston rod of the lifting cylinder 91 pushes the lifting plate 7 close to the bottom of the refrigerator 3 until the first proximity switch 13 is triggered. At this time, the support plate 12 abuts against the bottom of the refrigerator 3, and the sealing strip 14 seals the gap between the refrigerator 3 and the harness line 81.

[0053] The cable 0 to be tested is placed in a sealed low-temperature environment. The control panel 2 then powers on the cable 0 to be tested and constantly records a trend chart of the thermal stability index of the cable 0 to be tested changing with time when the cable 0 to be tested is in a low-temperature environment of different temperatures.

[0054] After a period of time, the lifting cylinder 91 drives the lifting plate 7 to descend, and at the same time, the reciprocating motor 65 drives the detection plate 5 to move to the bottom of the heater 4 through the synchronous belt 63 and the synchronous wheel 62, and the energized cable to be tested 0 is attached to the bottom of the heater 4 through the lifting cylinder 91. At this time, the control panel 2 constantly records the change trend of the thermal stability index of the cable to be tested 0 over time when the cable to be tested 0 is in a high-temperature environment with different temperatures.

[0055] Finally, the detection process of the refrigerator 3 and the heater 4 is repeated in sequence until the number of repeated detections of the cable 0 to be tested reaches the designed number of repeated detections, thereby obtaining the thermal stability test result of the cable 0 to be tested under the extreme temperature environment.

[0056] Example 2 Embodiment 2 of the present application discloses a detection method of a heating cable thermal safety detection test device, comprising the following steps: S1. The worker first loosens the multiple pressure caps 83 on the cable tie wire 81, then inserts the two ends of the multiple cables 0 to be tested into the corresponding cable tie holes 82 of the two cable tie wires 81 in sequence, and then tightens the pressure caps 83 to fix the ends of the cables 0 to be tested on the lifting plate 7; S2. The worker inputs the working temperature values ​​of the refrigerator 3 and the heater 4, the temperature change, the working time at the corresponding temperature, and the number of repetitions of the cable 0 under low and high temperature environments on the control panel 2 according to the design requirements of the cable 0 under test; S3, the control panel 2 starts the reciprocating motor 65, and the output shaft of the reciprocating motor 65 drives the connecting bridge plate 64 to slide the detection plate 5 through the synchronous wheel 62 and the synchronous belt 63, so that the detection plate 5 slides back and forth along the direction from the refrigerator 3 to the heater 4; S4, when the detection plate 5 moves to the bottom of the refrigerator 3, and the in-position plate 15 at this time triggers the second proximity switch 16, the reciprocating motor 65 changes the rotation direction and stops working; S5, the control panel 2 starts the lifting cylinder 91, and the piston rod of the lifting cylinder 91 pushes the lifting plate 7 to approach the bottom of the refrigerator 3 until the first proximity switch 13 is triggered; S6. The control panel 2 powers on the cable 0 to be tested, and constantly records a trend chart of the thermal stability index of the cable 0 to be tested changing with time when the cable 0 to be tested is in a low-temperature environment at different temperatures; S7, after a period of time, the lifting cylinder 91 drives the lifting plate 7 to descend, and at the same time, the reciprocating motor 65 drives the detection plate 5 to move to the bottom of the heater 4 through the synchronous belt 63 and the synchronous wheel 62. At this time, the in-position plate 15 triggers the second proximity switch 16, and the reciprocating motor 65 changes the rotation direction and stops working; S8, the lifting electric cylinder 91 makes the energized cable 0 to be tested stick to the bottom of the heater 4, and the control panel 2 records the trend of the thermal stability index of the cable 0 to be tested over time when the cable 0 to be tested is in a high temperature environment of different temperatures; S9, repeat the detection process of the refrigerator 3 and the heater 4 in sequence until the number of repeated detections of the cable 0 to be tested reaches the designed number of repeated detections, and finally obtain the thermal stability detection result of the cable 0 to be tested under the extreme temperature environment.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heating cable thermal safety detection test device, characterized in that: The invention comprises a detection platform (1), a control panel (2), a refrigerator (3) and a heater (4), wherein the refrigerator (3) and the heater (4) are both electrically connected to the control panel (2), a detection plate (5) is slidably arranged on the detection platform (1), a driving component (6) is arranged on the detection platform (1), and the driving component (6) is used to drive the detection plate (5) to slide back and forth in a direction from the refrigerator (3) to the heater (4), and a lifting plate (7) is vertically slidably arranged on the detection plate (5), and the lifting plate (7) is ) is provided with a cable tie (8), the cable tie (8) is used to fix the cable to be tested (0) on the lifting plate (7), the detection plate (5) is provided with a lifting member (9), the lifting member (9) is used to drive the lifting plate (7) close to the refrigerator (3) or the heater (4), the detection plate (5) is provided with a wiring switch (10) electrically connected to the control panel (2), and an energized wire (11) is connected between the wiring switch (10) and the end of the cable to be tested (0) on the lifting plate (7).

2. A heating cable thermal safety detection test device according to claim 1, characterized in that: The driving assembly (6) comprises a guide rod (61) arranged on the detection platform (1), the guide rod (61) is located directly below the refrigerator (3) and the heater (4), the detection plate (5) is slidably sleeved on the guide rod (61), synchronous wheels (62) are rotatably arranged on both ends of the detection platform (1) and located on the guide rod (61), a synchronous belt (63) is commonly wound around the two synchronous wheels (62), a connecting bridge plate (64) is arranged on the detection plate (5), and the connecting bridge plate (64) is arranged on the synchronous belt (63), and a reciprocating motor (65) electrically connected to the control panel (2) is arranged on the detection platform (1), and one of the synchronous wheels (62) is coaxially arranged on the output shaft of the reciprocating motor (65).

3. A heating cable thermal safety detection test device according to claim 1, characterized in that: The cable harness (8) comprises two cable harnesses (81) arranged on the lifting plate (7), a plurality of cable harness holes (82) are provided on the cable harnesses (81) along the length direction thereof, and the two ends of the cable to be tested (0) are respectively inserted into the corresponding cable harness holes (82) on the two cable harnesses (81), and a pressure cap (83) is threadedly connected on the cable harnesses (81), and the pressure cap (83) corresponds to the cable harness holes (82) one by one, and the pressure cap (83) is used to fix the end of the cable to be tested (0) on the cable harness hole (82) of the cable harnesses (81), and a plurality of the power-carrying wires (11) are provided on the wiring switch (10), and the power-carrying wires (11) correspond to the cable harness holes (82) one by one, and the power-carrying wires (11) are used to connect the cable harnesses (81) and the wiring switch (10).

4. A heating cable thermal safety detection test device according to claim 1, characterized in that: The lifting member (9) comprises a lifting electric cylinder (91) which is arranged on the detection plate (5) and electrically connected to the control panel (2); the lifting plate (7) is arranged on the piston rod of the lifting electric cylinder (91); the lifting plate (7) is provided with a plurality of guide columns (92) whose axes are parallel to the axes of the piston rods of the lifting electric cylinders (91); and the guide columns (92) slide through the detection plate (5).

5. A heating cable thermal safety detection test device according to claim 3, characterized in that: A support plate (12) is detachably provided on the detection plate (5) and located between the two harness lines (81); the support plate (12) is provided at both ends of the harness line (81); the cable to be tested (0) is located between the two support plates (12); a first proximity switch (13) electrically connected to the control panel (2) is provided on the detection plate (5); the sensing end of the first proximity switch (13) is used to point to the bottom of the refrigerator (3) or the bottom of the heater (4).

6. A heating cable thermal safety detection test device according to claim 5, characterized in that: Both ends of the support plate (12) are in contact with the beam line (81), and sealing strips (14) are provided on the refrigerator (3) and the heater (4), and the sealing strips (14) are used to seal the gap between the refrigerator (3) and the beam line (81) or the gap between the heater (4) and the beam line (81).

7. A heating cable thermal safety detection test device according to claim 2, characterized in that: A positioning plate (15) is arranged on the detection plate (5), and second proximity switches (16) electrically connected to the control panel (2) are arranged on the detection platform (1) and directly below the refrigerator (3) and the heater (4), and the sensing ends of the two second proximity switches (16) are both directed toward the positioning plate (15).

8. A heating cable thermal safety detection test device according to claim 1, characterized in that: An observation rack (17) is arranged on the detection platform (1), and a plurality of transparent observation panels (18) are arranged on the observation rack (17). The refrigerator (3) and the heater (4) are both located inside the observation rack (17).

9. A detection method for the heating cable thermal safety detection test device according to any one of claims 1 to 8, characterized in that: The steps include: S1. A worker fixes the cable to be tested (0) on the lifting plate (7) by means of the cable bundle (8), and then connects the wiring switch (10) to the end of the cable to be tested (0) through the power-carrying wire (11) to form a closed loop; S2. The worker inputs the operating temperature, duration and number of repetitions of the refrigerator (3) and the heater (4) on the control panel (2); S3, the driving component (6) first drives the detection plate (5) to move to the bottom of the refrigerator (3), and then the lifting member (9) drives the cable to be tested (0) on the lifting plate (7) to be attached to the bottom of the refrigerator (3), and then the control panel (2) powers on the cable to be tested (0), and constantly records the change of the thermal stability index of the cable to be tested (0) over time when the cable to be tested (0) is in a low-temperature environment at different temperatures; S4. After a period of time, the lifting member (9) drives the lifting plate (7) to move away from the refrigerator (3), and at the same time, the driving component (6) drives the detection plate (5) to move to the bottom of the heater (4), and the energized cable to be tested (0) is attached to the bottom of the heater (4) through the lifting member (9). At this time, the control panel (2) constantly records the change of the thermal stability index of the cable to be tested (0) over time when the cable to be tested (0) is in a high temperature environment at different temperatures; S5, repeating the detection process of the refrigerator (3) and the heater (4) in sequence until the number of detections of the cable to be tested (0) reaches the designed number of repetitions.

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