A cable terminal and joint electrical performance comprehensive detection device

Abstract

The application relates to the technical field of cable accessory performance detection, and discloses a cable terminal and joint electric performance comprehensive detection device, which comprises a device main body used for detecting the cable accessory, a handle rotatably connected to the top side of the front end of the device main body, a connecting piece fixedly connected to the top side of the rear end of the device main body, a cover plate rotatably connected to the top of the connecting piece, a control center fixedly connected to one side of the top of the device main body, a plurality of test terminals electrically connected to the other side of the top of the device main body, a storage chamber fixedly connected to the inside of the device main body and extending through the top outside of the device main body, a plurality of cooling jackets fixedly connected to the inside of the device main body, the cooling jackets being fixedly connected to the outer surfaces of the test terminals, and a plurality of sampling resistors fixedly connected to the other end of the inside of the device main body. The device has the advantages that the lifting device can improve the detection precision of cables with different load capacities.

Description

Technical Field

[0001] This invention relates to the field of cable accessory performance testing technology, specifically to a comprehensive testing device for the electrical performance of cable terminals and joints. Background Technology

[0002] A qualified cable assembly consists of the cable body, cable terminals, and cable joints. Cable terminals and cable joints are indispensable key components in power cable lines, used to achieve reliable connection between cables and electrical equipment, as well as splicing between cables. Cable accessories are in environments with concentrated electric fields, complex structures, and harsh operating conditions, and are the weakest links in the insulation of the entire cable system. Their reliability is directly related to the safe and stable operation of the power transmission and distribution system. Currently, the main equipment for testing cable terminals and joints is the comprehensive cable detector.

[0003] Publication No. CN222761837U discloses a comprehensive cable testing bench, characterized in that it includes: a vibration table, a cable support fixed to the output end of the vibration table, the cable support having a socket for inserting a connector of the cable under test, a momentary interruption detector having a detection port, a converter cable having both ends electrically connected to the socket and the detection port respectively, and a controller communicatively connected to the momentary interruption detector. The controller is used to receive and analyze the detection signal of the momentary interruption detector. The momentary interruption detector has multiple detection ports, the cable support has multiple sockets, and the sockets correspond one-to-one with the detection ports. The converter cable includes a first converter bundle and a second converter bundle. One end of the first converter bundle is connected to multiple sockets, and the other end of the first converter bundle integrates a male converter. One end of the second converter bundle is connected to multiple detection ports, and the other end of the second converter bundle integrates a female converter. The male converter and the female converter are connected. This device avoids the situation of missed detection in existing cable vibration tests and can better ensure the detection accuracy of the cable under test. In practical applications, cable comprehensive testers can be used to perform insulation resistance, continuity, and withstand voltage tests on cable terminals and joints. The joint is electrically connected to the interface of the cable comprehensive tester, a DC high voltage is applied to the cable joint, and the insulation resistance is measured. A higher resistance value indicates better insulation performance. To further improve the efficiency of cable insulation resistance testing, cable comprehensive testers capable of simultaneously testing multiple cables are commonly used in the market. However, different cables have different load capacities, and their heating patterns differ when receiving the same current. Existing equipment typically uses simultaneous cooling methods for cable joints, regardless of whether the cable has a high or low load capacity. Using a lower temperature cooling method, high-load cable joints can be cooled continuously, while low-load cable joints, whose temperatures rise and fall earlier than high-load cable joints, experience excessively long cooling times with this method. This can lead to excessively low temperatures, causing the outer sheath to age and reducing lifespan. Conversely, using a higher temperature cooling method allows for continuous and prolonged cooling of low-load cable joints, reducing aging. However, this method is insufficient for cooling high-load cable joints, resulting in poor actual cooling performance and impacting the device's detection accuracy. There is room for improvement in the detection accuracy of existing equipment for cables with different load capacities. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a comprehensive testing device for the electrical performance of cable terminals and joints, which has the advantage of improving the testing accuracy of the device for cables with different load capacities.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a comprehensive testing device for the electrical performance of cable terminals and joints, comprising: a main body, a handle, a connector, a cover plate, a control center, test terminals, a cooling jacket, a first piston plate, an elastic element, a second piston plate, a mounting strip, a meshing plate, a limiting rod, a sampling resistor, a shaft, a meshing wheel, a storage chamber, a conveying pipe, a conveying chamber, a shielding plate, a first filter plate, a second filter plate, a sealing rod, an output pipe, a diversion chamber, a solenoid valve, a diversion pipe, a mounting component, an adjusting cylinder, a first trigger element, a first temperature-conducting plate, a temperature-conducting rod, a contact plate, a push plate, a connecting rod, a through rod, an adjusting plate, an emergency stop chamber, a second temperature-conducting plate, a second trigger element, a contact, and a trigger.

[0006] The positions and connections of the above structures are as follows: A comprehensive electrical performance testing device for cable terminals and joints includes a main body for testing cable accessories. A handle is rotatably connected to the top front end of the main body, a connector is fixedly connected to the top rear end of the main body, a cover plate is rotatably connected to the top of the connector, a control center is fixedly connected to one side of the top of the main body, and multiple test terminals are electrically connected to the other side of the top of the main body. A storage chamber is fixedly connected inside the main body and extends through and to the outer side of the top of the main body. Multiple cooling sleeves are fixedly connected inside the main body and are fixedly connected to the outer surface of the test terminals. Multiple sampling resistors are fixedly connected to the other end of the main body. The number of sampling resistors is the same as that of the test terminals, and the sampling resistors are electrically connected to the control center.

[0007] Preferably, a first piston plate and a second piston plate are respectively provided on both sides of the interior of the cooling sleeve. A temperature-conducting rod is sleeved inside the first piston plate. The other end of the temperature-conducting rod passes through the first piston plate and extends to the outer side of the other end of the first piston plate. A contact plate is fixedly connected to the other end of the temperature-conducting rod. The contact plate is specifically made of a heat-conducting material and is fixedly connected to one end surface of the test terminal. One end of the temperature-conducting rod passes through the first piston plate and extends to the outer side of one end of the cooling sleeve. An adjusting cylinder is provided at one end of the cooling sleeve. An extension of the temperature-conducting rod passes through the adjusting cylinder and extends into the interior of the adjusting cylinder. A first trigger element is fixedly connected to the center of the interior of the adjusting cylinder. The first trigger element is made of shape memory alloy, and the triggering temperature of the first trigger element is related to the detection accuracy of the cable connector heating effect. The temperature is the same. A first temperature-conducting plate is fixedly connected between the first trigger and one end extension of the temperature-conducting rod. A push plate is fixedly connected to one end of the first trigger. A connecting rod is fixedly connected to one end of the push plate. A through rod is fixedly connected to one end of the connecting rod. The through rod passes through the connecting cylinder and extends to the outside of one end of the connecting cylinder. An adjusting plate is fixedly connected to the extension of the through rod. A conveying chamber is provided at one end of the storage chamber near the cooling jacket. A conveying pipe is fixedly connected between the storage chamber and the conveying chamber. The adjusting plate passes through the conveying chamber and extends into the interior of the conveying chamber. A baffle plate is slidably connected at the connection between the adjusting plate and the conveying chamber, and the baffle plate is fixedly connected to the adjusting plate. Two elastic elements, specifically springs, are fixedly connected between the first piston plate, the second piston plate, and the inner wall of the cooling jacket.

[0008] Preferably, the storage chamber consists of a cooler, a water tank, and a pumping assembly. A first filter plate is fixedly connected inside the conveying chamber. A second filter plate is provided at one end of the first filter plate. The first filter plate has multiple first filter holes inside. A sealing rod is fixedly connected to one end of the second filter plate near the first filter holes. A second filter hole is opened between every two sealing rods on the second filter plate. An extension of the adjusting plate is fixedly connected to the bottom of the second filter plate. An output pipe is fixedly connected to the other end of the conveying chamber. The output pipe passes through and extends into the interior of the cooling jacket.

[0009] Preferably, a diversion chamber is fixedly connected to the extension of the output pipe, and two diversion pipes are fixedly connected to both sides of the diversion chamber. The diversion pipes are arranged in a curved shape, and multiple diversion holes are opened on the outer surface of the diversion pipes. A solenoid valve is fixedly connected to the bottom of the diversion chamber, and the solenoid valve is electrically connected to the control center.

[0010] Preferably, the diversion holes on the outer surface of the diversion tube are staggered, and the bottom outer surface of the diversion tube is fixedly connected with mounting parts. The ends of the four mounting parts away from their plane of symmetry are respectively fixedly connected to the first piston plate and the second piston plate in pairs.

[0011] Preferably, a shaft is fixedly connected to the front adjustment end of the sampling resistor, a meshing wheel is fixedly connected to the front end of the shaft, an installation strip is fixedly connected to the other end of the second piston plate, the installation strip passes through the cooling sleeve and extends to the outer side of the other end of the cooling sleeve, a meshing plate is fixedly connected to the extended part of the installation strip, the meshing plate meshes with the meshing wheel, a limit rod is sleeved inside the meshing plate, and the other end of the limit rod passes through the meshing plate and is fixedly connected to the inside of the main body of the equipment.

[0012] Preferably, an emergency stop chamber is fixedly connected to the bottom of the regulating cylinder, and a second temperature-conducting plate is fixedly connected to the bottom of the first temperature-conducting plate. The second temperature-conducting plate passes through the regulating cylinder and extends into the interior of the emergency stop chamber. A second trigger is fixedly connected to the extended portion of the second temperature-conducting plate. The second trigger is specifically a shape memory alloy, and the triggering temperature of the second trigger is the temperature at which the cable connector is damaged. A contact is fixedly connected to one end of the second trigger, and a trigger is fixedly connected to the inner wall of one end of the emergency stop chamber. The trigger is electrically connected to the control center.

[0013] Preferably, the control center includes a microprocessor, an emergency stop switch, a testing system and software, a current output and voltage testing module, a signal input / output interface, and a control panel, all of which are electrically connected to each other.

[0014] Beneficial effects 1. This comprehensive electrical performance testing device for cable terminals and joints allows the device to automatically adjust its cooling effect based on the cooling rate of different cables by opening the cooling jacket. This enables it to be adapted to test cable joints with various load capacities, improving the cooling effect and testing accuracy of the device, and making it easier for users to operate.

[0015] 2. This comprehensive electrical performance testing device for cable terminals and connectors, by opening the cooling jacket, allows the coolant to be distributed as evenly as possible inside the cooling jacket when it flows out, reducing the situation where the coolant accumulates in one place and causes a cooling dead zone inside the cooling jacket, thus improving the cooling effect and testing accuracy of the device and making it easier for users to use.

[0016] 3. This comprehensive electrical performance testing device for cable terminals and joints, by opening the cooling jacket, makes the test results of the device closer to the actual data of the cable joint, which is convenient for users. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of a comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 2 This is a rear view schematic diagram of the comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 4 This is a schematic diagram of the cooling jacket structure of a comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 5 This is a schematic diagram of the internal structure of the cooling jacket of the comprehensive electrical performance testing device for cable terminals and connectors according to the present invention. Figure 6 This is a schematic diagram of the shunt pipe structure of a comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 7 This is a schematic diagram of the internal structure of the adjusting cylinder of the comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 8 This is a schematic diagram of the internal structure of the conveyor chamber of the comprehensive electrical performance testing device for cable terminals and connectors according to the present invention; Figure 9 This is a schematic diagram of the first filter plate structure of a comprehensive electrical performance testing device for cable terminals and connectors according to the present invention.

[0018] In the diagram: 1. Main body of the equipment; 10. Handle; 11. Connector; 12. Cover plate; 13. Control center; 2. Test terminal; 20. Cooling jacket; 21. First piston plate; 22. Elastic element; 23. Second piston plate; 24. Mounting strip; 25. Meshing plate; 250. Limiting rod; 26. Sampling resistor; 260. Shaft; 261. Meshing wheel; 3. Storage chamber; 30. Conveying pipe; 31. Conveying chamber; 310. Baffle plate; 311. First filter plate; 312. Second filter plate 313. Plate; 314. Blocking rod; 315. Output pipe; 316. Diverter chamber; 317. Solenoid valve; 318. Diverter pipe; 319. Mounting component; 32. Adjusting cylinder; 320. First trigger; 321. First temperature guide plate; 322. Temperature guide rod; 323. Contact plate; 324. Push plate; 325. Connecting rod; 326. Through rod; 327. Adjusting plate; 33. Emergency stop chamber; 330. Second temperature guide plate; 331. Second trigger; 332. Contact; 333. Trigger. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example Please see Figures 1 to 3 A comprehensive electrical performance testing device for cable terminals and joints includes a main body 1 for testing cable accessories. A handle 10 is rotatably connected to the top front side of the main body 1. A connector 11 is fixedly connected to the top rear side of the main body 1. A cover plate 12 is rotatably connected to the top of the connector 11. A control center 13 is fixedly connected to one side of the top of the main body 1. Multiple test terminals 2 are electrically connected to the other side of the top of the main body 1. A storage chamber 3 is fixedly connected inside the main body 1 and extends through and to the outer side of the top of the main body 1. Multiple cooling sleeves 20 are fixedly connected inside the main body 1 and are fixedly connected to the outer surface of the test terminals 2. Multiple sampling resistors 26 are fixedly connected to the other end of the main body 1. The number of sampling resistors 26 is the same as that of the test terminals 2, and the sampling resistors 26 are electrically connected to the control center 13. In practical applications, cable comprehensive testers can be used to perform insulation resistance, continuity, and withstand voltage tests on cable terminals and joints. The joint is electrically connected to the interface of the cable comprehensive tester, a DC high voltage is applied to the cable joint, and the insulation resistance is measured. A higher resistance value indicates better insulation performance. To further improve the efficiency of cable insulation resistance testing, cable comprehensive testers capable of simultaneously testing multiple cables are commonly used in the market. However, different cables have different load capacities, and their heating patterns differ when receiving the same current. Existing equipment typically uses simultaneous cooling methods for cable joints, regardless of whether the cable has a high or low load capacity. Using a lower temperature cooling method, high-load cable joints can be cooled continuously, while low-load cable joints, whose temperature rises and falls earlier than high-load cable joints, experience excessively long cooling times under this method. This can lead to excessively low temperatures, causing the outer sheath to age and reducing lifespan. Conversely, using a higher temperature cooling method allows for continuous and prolonged cooling of low-load cable joints, reducing aging. However, this method is insufficient for cooling high-load cable joints, resulting in poor actual cooling performance and impacting the device's detection accuracy. There is room for improvement in the detection accuracy of existing equipment for cables with different load capacities. This invention discloses a comprehensive electrical performance testing device for cable terminals and joints. By setting up a cooling chamber and a storage chamber 3, the device can automatically cool and de-temperature cable joints with different heating rates under different load capacities. On the one hand, it ensures that cables with different load capacities can be sufficiently cooled without aging the outer sheath. On the other hand, it reduces the overall consumption of coolant, saves resources, and is convenient for users. Please see Figures 1 to 5Further, as described above, a first piston plate 21 and a second piston plate 23 are respectively provided on both sides of the interior of the cooling sleeve 20. A temperature-conducting rod 322 is sleeved inside the first piston plate 21. The other end of the temperature-conducting rod 322 passes through the first piston plate 21 and extends to the outer side of the other end of the first piston plate 21. A contact plate 323 is fixedly connected to the other end of the temperature-conducting rod 322. The contact plate 323 is specifically made of a heat-conducting material and is fixedly connected to one end surface of the test terminal 2. One end of the temperature-conducting rod 322 passes through the first piston plate 21 and extends to the outer side of one end of the cooling sleeve 20. An adjusting cylinder 32 is provided at one end of the cooling sleeve 20. An extension of the temperature-conducting rod 322 passes through the adjusting cylinder 32 and extends into the interior of the adjusting cylinder 32. A first trigger element 320 is fixedly connected to the center of the interior of the adjusting cylinder 32. The first trigger element 320 is made of shape memory alloy, and the triggering temperature of the first trigger element 320 is related to the temperature at which the heating of the cable connector affects the detection accuracy. Similarly, a first temperature-conducting plate 321 is fixedly connected between the first trigger 320 and one end extension of the temperature-conducting rod 322. A push plate 324 is fixedly connected to one end of the first trigger 320. A connecting rod 325 is fixedly connected to one end of the push plate 324. A through rod 326 is fixedly connected to one end of the connecting rod 325. The through rod 326 passes through the connecting cylinder and extends to the outside of one end of the connecting cylinder. An adjusting plate 327 is fixedly connected to the extension of the through rod 326. The storage chamber 3 is close to the cooling jacket. A conveying chamber 31 is provided at one end of the 20. A conveying pipe 30 is fixedly connected between the storage chamber 3 and the conveying chamber 31. An adjusting plate 327 passes through the conveying chamber 31 and extends into the interior of the conveying chamber 31. A baffle plate 310 is slidably connected at the connection between the adjusting plate 327 and the conveying chamber 31, and the baffle plate 310 is fixedly connected to the adjusting plate 327. Two elastic elements 22 are fixedly connected between the first piston plate 21, the second piston plate 23 and the inner wall of the cooling jacket 20. The elastic element 22 is specifically a spring. Multiple cable connectors with different load capacities are electrically connected to test terminal 2. The main body of the equipment 1 is activated via control center 13. Current is supplied to the main body of the equipment 1 through test terminal 2 and the cable connectors. A meter is then read at control center 13 to obtain the leakage current data at each cable connector. Since the voltage remains constant, R (insulation resistance of the cable connector) can be determined using the formula R=V / I. Thus, the insulation resistance data of the cable connector is detected. The temperature rise varies at different load capacities. Initially, contact plate 323 is in close contact with test terminal 2. When the temperature at the cable connector rises to a level that affects detection accuracy, the cable connector transfers the high temperature to test terminal 2 via heat transfer. However, contact plate 323, due to its design... As a heat-conducting material, it can transfer high temperature to the temperature-conducting rod 322, and then the temperature-conducting rod 322 transfers the high temperature to the first temperature-conducting plate 321. After receiving the high temperature transferred by the first temperature-conducting plate 321, the first trigger 320 is inverted and reset to its original length and size. At this time, the reset of the first trigger 320 can drive the through rod 326 to make a linear movement away from the regulating cylinder 32 through the push plate 324 and the connecting rod 325. The movement of the through rod 326 drives the regulating plate 327 to move, so that the device can spontaneously respond to the heating of cable joints with different load capacities in a timely manner and trigger the subsequent cooling process, thereby reducing the impact of temperature on cable joint detection, improving the detection accuracy of the device for cable joints with different load capacities, and making it convenient for users to use. Please see Figures 4 to 9 Further as described above, the storage chamber 3 is composed of a cooler, a water tank, and a pumping assembly. A first filter plate 311 is fixedly connected inside the conveying chamber 31. A second filter plate 312 is provided at one end of the first filter plate 311. A plurality of first filter holes are provided inside the first filter plate 311. A blocking rod 313 is fixedly connected to one end of the second filter plate 312 near the first filter holes. A second filter hole is opened between every two blocking rods 313 at the second filter plate 312. The extension of the adjusting plate 327 is fixedly connected to the bottom of the second filter plate 312. An output pipe 314 is fixedly connected to the other end of the conveying chamber 31. The output pipe 314 penetrates and extends into the interior of the cooling jacket 20. Initially, the second filter plate 312 is tightly fitted to the first filter plate 311. The sealing rod 313 is set in a conical shape and seals the inside of the first filter hole. In the above steps, the adjusting plate 327 moves linearly away from the adjusting cylinder 32, causing the second filter plate 312 to move linearly away from the first filter plate 311. The movement of the second filter plate 312 causes multiple sealing rods 313 to separate and move from the inside of the first filter hole. At this time, the internal program of the control center 13 is set to start the pumping component. The pumping component starts to transport the coolant in the water storage tank to the inside of the conveying chamber 31 through the conveying pipe 30. Then, it is transported to the output pipe 314 through multiple second filter holes at the second filter plate 312 and multiple first filter holes at the first filter plate 311. The output pipe 314 transports the coolant to the inside of the cooling jacket 20. The heat absorption and cooling of the coolant are used to perform water cooling treatment on the test terminal 2 and the cable connector. Since the materials of cables with different load capacities are basically the same, The high-temperature factors affecting the detection accuracy are basically the same, only the rate of heating of the cable joints varies depending on the load capacity. This application can spontaneously and promptly detect and cool down the cable joints. For example, if the cable joint and test terminal 2 continue to heat up under the heat absorption of the coolant, the first trigger 320 remains unchanged, the position of the first filter plate 311 remains unchanged, and the output pipe 314 can continuously deliver coolant to further improve the cooling capacity. Similarly, if the cable joint and test terminal 2 cool down, the first trigger 320 deforms and retracts a part, the second filter plate 312 resets a certain distance, the sealing rod 313 slightly blocks the first filter hole, and the coolant delivered to the cooling jacket 20 through the output pipe 314 decreases, thus reducing the cooling capacity of the device. Therefore, the device can spontaneously adjust the cooling effect according to the cooling rate of different cables, so that it can be adapted to the detection of cable joints with various load capacities, improving the cooling effect and detection accuracy of the device, and making it convenient for users. Please see Figures 4 to 6 Furthermore, as described above, a diversion chamber 315 is fixedly connected to the extension of the output pipe 314. Two diversion pipes 317 are fixedly connected to both sides of the diversion chamber 315. The diversion pipes 317 are arranged in a curved shape. Multiple diversion holes are opened on the outer surface of the diversion pipes 317. A solenoid valve 316 is fixedly connected to the bottom of the diversion chamber 315. The solenoid valve 316 is electrically connected to the control center 13. In the above steps, the coolant is delivered to the cooling jacket 20 via the distribution chamber 315 first. Initially, the solenoid valve 316 is closed. At this time, the coolant inside the distribution chamber 315 can only flow out into the cooling jacket 20 through the four distribution pipes 317 and multiple distribution holes. This ensures that the coolant is distributed as evenly as possible inside the cooling jacket 20 when it flows out, reducing the situation where the coolant accumulates in one place, causing a cooling dead zone inside the cooling jacket 20. This improves the cooling effect and detection accuracy of the device and makes it easier for users to use. Please see Figures 4 to 6 Furthermore, in the above description, the diversion holes on the outer surface of the diversion pipe 317 are staggered, and the bottom outer surface of the diversion pipe 317 is fixedly connected to the mounting parts 318. The ends of the four mounting parts 318 away from their symmetrical planes are fixedly connected to the first piston plate 21 and the second piston plate 23 in pairs, respectively. In the above steps, when the coolant is sprayed out from the distribution holes, since the distribution holes are staggered, the coolant sprayed from different distribution holes impacts the distribution pipe 317 in different directions, causing the distribution pipe 317 to shake within the cooling jacket 20. The shaking of the distribution pipe 317 mixes and stirs the coolant in the vicinity to a certain extent, thereby improving the mixing and heat absorption effect of the coolant, improving the cooling effect and detection accuracy of the device, and making it easier for users to use. Please see Figures 1 to 9 Furthermore, as described above, the front adjustment end of the sampling resistor 26 is fixedly connected to a shaft 260, the front end of the shaft 260 is fixedly connected to a meshing wheel 261, the other end of the second piston plate 23 is fixedly connected to an mounting strip 24, the mounting strip 24 passes through the cooling sleeve 20 and extends to the outside of the other end of the cooling sleeve 20, the extension of the mounting strip 24 is fixedly connected to a meshing plate 25, the meshing plate 25 is meshed with the meshing wheel 261, a limit rod 250 is sleeved inside the meshing plate 25, the other end of the limit rod 250 passes through the meshing plate 25 and is fixedly connected inside the main body 1 of the equipment; As the coolant inside the cooling jacket 20 increases, the first piston plate 21 and the second piston plate 23 move linearly away from the test terminal 2 under the pressure of the coolant. The movement of the first piston plate 21 and the second piston plate 23 increases the storage space inside the cooling jacket 20, allowing it to hold more coolant for cooling. The movement of the first piston plate 21 and the second piston plate 23 drives the diversion pipe 317 to move through the mounting component 318, so that the device can expand the loading space inside the cooling jacket 20 while increasing the spray mixing range of the coolant, further improving the uniformity of the coolant, and improving the cooling effect and detection accuracy of the device. Since the insulation resistance of the cable joint itself decreases with rising temperature, according to the formula R=V / I, I will increase at this time. The increased leakage current leads to an increase in the voltage of the device. Therefore, a reference resistor is needed to supplement the insulation resistance of the cable joint, making the detection result closer to the actual value. However, conventional voltage test modules have a certain detection range, which may exceed the measurement range selected by the current equipment. Therefore, it is necessary to reduce the reference resistance of the equipment itself to switch the detection range of the voltage test module. In this application, the reference resistor is adjusted by the sampling resistor 26. In the above steps, the movement of the second piston plate 23 drives the installation bar 24 to move. The movement of the installation bar 24 drives the engagement plate 25 to move. The movement of the engagement plate 25 drives the engagement wheel 261 to rotate. The rotation of the engagement wheel 261 drives the adjustment terminal (knob) at the front end of the sampling resistor 26 to rotate. The rotation of the adjustment terminal reduces the resistance of the sampling resistor 26, thereby increasing the range of the voltage test module inside the control center 13. For example, At room temperature, the leakage current of the cable joint is 50nA. At this time, the resistance of the sampling resistor 26 is 1MΩ, and the detection voltage is 50mV, which is within the range of the voltage test module. The control center 13 can measure and calculate the insulation resistance. However, when the temperature rises, the insulation resistance of the cable joint itself decreases, and the leakage current is 50μA. When the resistance of the sampling resistor 26 remains unchanged, the detection voltage is 50V, which far exceeds the maximum range of the conventional voltage detection module. This application can adjust the resistance of the sampling resistor 26 in a timely manner according to the temperature rise of the cable joint, thereby achieving the following steps: continuous heating of the cable joint → unidirectional temperature rise of the cable → coolant only enters and does not exit → first piston plate 21 and second piston plate 23 only retract and do not enter → sampling resistor 26 gradually decreases → reference resistance only decreases and does not increase → voltage test module range always adapts to the current leakage current → measurement accuracy is maintained in the entire temperature range. This improves the detection accuracy of the device and makes the detection results of the device closer to the actual data of the cable joint, making it convenient for users. Please see Figures 1 to 9 Furthermore, as described above, an emergency stop chamber 33 is fixedly connected to the bottom of the regulating cylinder 32, and a second temperature-conducting plate 330 is fixedly connected to the bottom of the first temperature-conducting plate 321. The second temperature-conducting plate 330 penetrates the regulating cylinder 32 and extends into the interior of the emergency stop chamber 33. A second trigger 331 is fixedly connected to the extended portion of the second temperature-conducting plate 330. The second trigger 331 is specifically a shape memory alloy, and the triggering temperature of the second trigger 331 is the temperature at which the cable connector is damaged. A contact 332 is fixedly connected to one end of the second trigger 331, and a trigger 333 is fixedly connected to the inner wall of one end of the emergency stop chamber 33. The trigger 333 is electrically connected to the control center 13. Under normal circumstances, the first temperature-conducting plate 321 can transfer the temperature to the second temperature-conducting plate 330, and then the second temperature-conducting plate 330 can transfer the temperature to the second trigger 331. Since the temperature is lower than the trigger temperature of the second trigger 331, the second trigger 331 does not change. In the above steps, when the cable joint continues to heat up and reaches the dangerous temperature of the cable joint failure, the first temperature-conducting plate 321 transfers the temperature to the second temperature-conducting plate 330, and the second temperature-conducting plate 330 transfers the temperature to the second trigger 331. The second trigger 331 is then reset to its original length and size and pushes the contact 332 towards the trigger 333 until the contact 332 makes contact with the trigger 333 and activates the trigger 333. The trigger 333 then sends an electrical signal to the control center 13, which immediately cuts off the power to interrupt the detection, thereby reducing the damage caused by the cable joint failure. Meanwhile, the coolant continues to increase to absorb heat and cool the cable joint, allowing it to return to normal temperature as soon as possible after the current is lost, improving the detection effect of the device and making it easier for users to use. Please see Figures 1 to 3 Furthermore, as described above, the control center 13 includes a microprocessor, an emergency stop switch, a test system and software, a current output and voltage test module, a signal input / output interface, and a control panel. The microprocessor, emergency stop switch, test system and software, current output and voltage test module, signal input / output interface, and control panel are electrically connected to each other. The control center 13 is used to control the start and stop of various components inside the main body 1, cooling jacket 20, and storage chamber 3 to ensure the normal operation of the device.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A comprehensive testing device for the electrical performance of cable terminals and joints, comprising a main body (1) for testing cable accessories, characterized in that: A handle (10) is rotatably connected to the top front end of the main body (1). A connector (11) is fixedly connected to the top rear end of the main body (1). A cover plate (12) is rotatably connected to the top of the connector (11). A control center (13) is fixedly connected to one side of the top of the main body (1). Multiple test terminals (2) are electrically connected to the other side of the top of the main body (1). A storage chamber (3) is fixedly connected inside the main body (1) and extends through and to the outer side of the top of the main body (1). Multiple cooling sleeves (20) are fixedly connected inside the main body (1). The cooling sleeves (20) are fixedly connected to the outer surface of the test terminals (2). Multiple sampling resistors (26) are fixedly connected to the other end of the main body (1). The number of sampling resistors (26) is the same as that of the test terminals (2), and the sampling resistors (26) are electrically connected to the control center (13).

2. The comprehensive electrical performance testing device for cable terminals and joints according to claim 1, characterized in that: The cooling jacket (20) has a first piston plate (21) and a second piston plate (23) respectively located on both sides of its interior. A temperature-conducting rod (322) is sleeved inside the first piston plate (21). The other end of the temperature-conducting rod (322) passes through the first piston plate (21) and extends to the outer side of the other end of the first piston plate (21). A contact plate (323) is fixedly connected to the other end of the temperature-conducting rod (322). The contact plate (323) is made of a heat-conducting material and is fixedly connected to one end surface of the test terminal (2). The temperature-conducting rod (322) One end of the first piston plate (21) extends to the outer side of one end of the cooling sleeve (20). An adjusting cylinder (32) is provided at one end of the cooling sleeve (20). An extension of the temperature guiding rod (322) extends through the adjusting cylinder (32) and into the interior of the adjusting cylinder (32). A first trigger (320) is fixedly connected to the center of the interior of the adjusting cylinder (32). The first trigger (320) is made of shape memory alloy, and the triggering temperature of the first trigger (320) is the same as the temperature at which the heating of the cable connector affects the detection accuracy. A first temperature-conducting plate (321) is fixedly connected between the first trigger (320) and one end of the extension of the temperature-conducting rod (322). A push plate (324) is fixedly connected to one end of the first trigger (320). A connecting rod (325) is fixedly connected to one end of the push plate (324). A through rod (326) is fixedly connected to one end of the connecting rod (325). The through rod (326) passes through the connecting cylinder and extends to the outside of one end of the connecting cylinder. An adjusting plate (327) is fixedly connected to the extension of the through rod (326). A storage chamber (3) is provided at one end near the cooling jacket (20). There is a conveying chamber (31), and a conveying pipe (30) is fixedly connected between the storage chamber (3) and the conveying chamber (31). An adjusting plate (327) passes through the conveying chamber (31) and extends into the interior of the conveying chamber (31). A baffle plate (310) is slidably connected at the connection between the adjusting plate (327) and the conveying chamber (31), and the baffle plate (310) is fixedly connected to the adjusting plate (327). Two elastic elements (22) are fixedly connected between the first piston plate (21), the second piston plate (23) and the inner wall of the cooling jacket (20). The elastic elements (22) are specifically springs.

3. The comprehensive electrical performance testing device for cable terminals and joints according to claim 2, characterized in that: The storage chamber (3) consists of a cooler, a water tank, and a pumping assembly. A first filter plate (311) is fixedly connected inside the conveying chamber (31). A second filter plate (312) is provided at one end of the first filter plate (311). Multiple first filter holes are provided inside the first filter plate (311). A sealing rod (313) is fixedly connected at one end of the second filter plate (312) near the first filter hole. A second filter hole is opened between every two sealing rods (313) at the second filter plate (312). The extension of the adjusting plate (327) is fixedly connected at the bottom of the second filter plate (312). An output pipe (314) is fixedly connected at the other end of the conveying chamber (31). The output pipe (314) passes through and extends into the interior of the cooling jacket (20).

4. The comprehensive electrical performance testing device for cable terminals and joints according to claim 3, characterized in that: A diversion chamber (315) is fixedly connected to the extension of the output pipe (314). Two diversion pipes (317) are fixedly connected to both sides of the diversion chamber (315). The diversion pipes (317) are bent. Multiple diversion holes are opened on the outer surface of the diversion pipes (317). A solenoid valve (316) is fixedly connected to the bottom of the diversion chamber (315). The solenoid valve (316) is electrically connected to the control center (13).

5. The comprehensive electrical performance testing device for cable terminals and joints according to claim 4, characterized in that: The diversion holes on the outer surface of the diversion tube (317) are staggered. The bottom outer surface of the diversion tube (317) is fixedly connected to the mounting parts (318). The ends of the four mounting parts (318) away from their symmetrical planes are fixedly connected to the first piston plate (21) and the second piston plate (23) respectively.

6. The comprehensive electrical performance testing device for cable terminals and joints according to claim 1, characterized in that: The front end of the sampling resistor (26) is fixedly connected to a shaft (260), and a meshing wheel (261) is fixedly connected to the front end of the shaft (260). An installation strip (24) is fixedly connected to the other end of the second piston plate (23). The installation strip (24) passes through the cooling sleeve (20) and extends to the other side of the cooling sleeve (20). A meshing plate (25) is fixedly connected to the extension of the installation strip (24). The meshing plate (25) meshes with the meshing wheel (261). A limit rod (250) is sleeved inside the meshing plate (25). The other end of the limit rod (250) passes through the meshing plate (25) and is fixedly connected inside the main body (1) of the equipment.

7. The comprehensive electrical performance testing device for cable terminals and joints according to claim 2, characterized in that: An emergency stop chamber (33) is fixedly connected to the bottom of the regulating cylinder (32), and a second temperature-conducting plate (330) is fixedly connected to the bottom of the first temperature-conducting plate (321). The second temperature-conducting plate (330) passes through the regulating cylinder (32) and extends into the interior of the emergency stop chamber (33). A second trigger (331) is fixedly connected to the extension of the second temperature-conducting plate (330). The second trigger (331) is specifically a shape memory alloy, and the triggering temperature of the second trigger (331) is the temperature at which the cable connector is damaged. A contact (332) is fixedly connected to one end of the second trigger (331), and a trigger (333) is fixedly connected to the inner wall of one end of the emergency stop chamber (33). The trigger (333) is electrically connected to the control center (13).

8. The comprehensive electrical performance testing device for cable terminals and joints according to claim 7, characterized in that: The control center (13) includes a microprocessor, an emergency stop switch, a test system and software, a current output and voltage test module, a signal input / output interface and a control panel. The microprocessor, emergency stop switch, test system and software, current output and voltage test module, signal input / output interface and control panel are electrically connected to each other.

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