Macromolecular composite insulation circuit breaker temperature rise testing device

Abstract

The invention relates to the field of electrical elements, and particularly discloses a polymer composite insulation circuit breaker temperature rise testing device, which comprises an experiment cavity and a test adjusting assembly arranged in the experiment cavity, and is characterized in that the experiment cavity is used for simulating a narrow and closed environment in a switch cabinet; a micro injection port is formed by utilizing a minimally invasive drilling head, then a high polymer material containing solvent dilution and an optical fiber sensor are synchronously pumped into the injection port by a micro high-pressure fluid pump, the optical fiber sensor reaches a preset position under the pushing of fluid through the cooperation of an injection walking pipe and an injection core end, and meanwhile gaps are filled with the diluted high polymer material; a three-dimensional temperature measurement network is formed at a key part of an insulating layer through an optical fiber sensor arranged on the six-axis mechanical arm, so that efficient and accurate monitoring of the internal temperature of the insulating layer is realized, and timely early warning is effectively carried out on local overheating risks.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical components, and particularly relates to a temperature rise test device for a circuit breaker with polymer composite insulation. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time. When there is a short circuit, the circuit breaker can utilize the large current magnetic field generated by the short circuit to overcome the counterforce spring, and the release pulls the operating mechanism to act, completing the instantaneous tripping of the switch. Or when overloaded, the current increases, the heat generation intensifies, and the bimetallic strip deforms to a certain extent, thereby pushing the operating mechanism to complete the instantaneous tripping action of the switch.

[0003] In the prior art, such as the "circuit breaker test device" with Chinese patent application number CN117443783A, which includes a test bench, a feeding component, an electrical variable detection component, a re-inspection component, a sorting component, and a screening component. A vibrating table is provided at the end of the side wall on one side of the test bench. The feeding component includes a vibrating disk, a feeding element, and a conveying track. The bottom surface of the vibrating disk is fixedly installed on the top surface of the vibrating table, and the feeding element is installed on the top surface of the test bench adjacent to one end of the vibrating table, and the length direction of the feeding element is perpendicular to the length direction of the test bench. In the above solution, this wire pressing device comprehensively detects and tests the circuit breaker by using the test bench, the feeding component, the electrical variable detection component, and the re-inspection component to ensure its normal operation and safety. Through the coordinated action of equipment such as the vibrating disk, the feeding track, and the reversing hook, the smooth transmission and positioning of the circuit breaker can be achieved. The use of the electrical variable detection component and the re-inspection component can perform dielectric tests, short circuit tests, and re-inspections on the circuit breaker to discover and eliminate abnormal circuit breakers among them, ensuring product quality and safety, improving production efficiency, ensuring product quality and safety, and realizing automated production, improving production efficiency and saving labor costs.

[0004] Currently, traditional temperature rise tests rely on external thermocouples or infrared temperature measurement, which cannot penetrate the polymer insulation layer and cannot obtain the internal temperature field distribution in real time, resulting in difficulty in warning the risk of local overheating (such as at the interface between the electrode and the insulation layer). Summary of the Invention

[0005] The purpose of the present invention is to provide a temperature rise test device for a circuit breaker with polymer composite insulation to solve the problem in the above background art that traditional temperature rise tests rely on external thermocouples or infrared temperature measurement, cannot penetrate the polymer insulation layer, cannot obtain the internal temperature field distribution in real time, and it is difficult to warn the risk of local overheating (such as at the interface between the electrode and the insulation layer).

[0006] To achieve the above purpose, the present invention provides the following technical solutions: Temperature rise test device for circuit breaker with polymer composite insulation, comprising: An experimental chamber; the experimental chamber is used to simulate the narrow and enclosed environment inside the switchgear cabinet.

[0007] A test and adjustment assembly installed inside the experimental chamber; the test and adjustment assembly is used to perform real-time testing on the polymer composite material layer of the circuit breaker inside.

[0008] The test and adjustment assembly includes an automatic connection structure and a distributed temperature measurement structure. The automatic connection structure is used to automatically complete the connection between the test circuit and the circuit breaker, and the distributed temperature measurement structure is used to monitor the temperature of the polymer composite material layer of the circuit breaker in real time; The automatic connection structure includes a six-axis robotic arm and a positioning vision sensor. The six-axis robotic arm is used to connect different execution ends according to different operations, and the positioning vision sensor is used to identify the position of the circuit breaker interface to achieve precise connection of the test circuit; The distributed temperature measurement structure includes an optical fiber sensor, an external distributed optical fiber temperature measurement data collector, and a guiding channel. The guiding channel is used to control the transportation of the optical fiber sensor according to the distribution rate. A micro-invasive drilling head is installed outside the guiding channel, and the external distributed optical fiber temperature measurement data collector is used to collect the temperature data of the optical fiber sensor.

[0009] Preferably, a guiding fluid chamber is opened inside the micro-invasive drilling head. A fluid injection walking pipe is connected to the side end of the guiding fluid chamber. The fluid injection walking pipe is located inside the end of the micro-invasive drilling head. An injection core end and a chip suction core end are respectively opened on the bottom outer wall surface of the micro-invasive drilling head, and the fluid injection walking pipe is connected to the injection core end.

[0010] Preferably, a fluid guiding pipe is connected to the top of the guiding fluid chamber. An opening and closing solenoid valve body is installed outside the fluid guiding pipe. A micro high-pressure fluid pump is installed at the side end of the fluid guiding pipe. A first replacement execution end is installed at the side end of the micro high-pressure fluid pump. A docking fixing clip is installed at the top side end of the first replacement execution end. A drilling part is installed at the bottom of the first replacement execution end. A first self-locking magnetic connection end is connected to the top side end of the first replacement execution end, and the side end of the first self-locking magnetic connection end is movably connected to the six-axis robotic arm.

[0011] Preferably, a push rod structure is opened inside the micro-invasive drilling head. The push rod structure includes a push sliding cavity and a push rod slidably installed in the push sliding cavity.

[0012] Preferably, a walking chip suction pipe is connected to the top end of the chip suction core end. The walking chip suction pipe is located inside the end of the micro-invasive drilling head.

[0013] Preferably, a replacement component is installed on the rear inner wall of the experimental chamber. The replacement component includes an installation frame, and at least two sets of docking grooves are formed on the surface of the installation frame. A second replacement execution end is connected inside one of the docking grooves.

[0014] Preferably, an X-axis guide rail is slidably connected to the top end of the six-axis robotic arm, and a Y-axis guide rail is slidably connected to the side end of the X-axis guide rail.

[0015] Preferably, a clamping component for clamping a circuit breaker is installed inside the experimental chamber. The clamping component includes a connecting fixed frame. A servo motor for driving the clamping component to rotate is installed on one of the outer side surfaces of the connecting fixed frame. The servo motor is connected to the inner wall of the experimental chamber. A flexible gripper is installed on one of the inner side surfaces inside the connecting fixed frame.

[0016] Preferably, a first electromagnetic blocker is installed outside the output end of the servo motor. An outer rotating frame is installed at the side end of the first electromagnetic blocker. The servo motor is drivingly connected to a bevel gear structure. A second electromagnetic blocker is connected to the side end of the bevel gear structure. The second electromagnetic blocker is connected to an inner rotating frame. The flexible grippers are symmetrically installed on the inner wall of the inner rotating frame.

[0017] Preferably, the experimental chamber is equipped with environmental simulation facilities. The environmental simulation facilities include a temperature and humidity regulator, a pressure regulator, and a cooling air duct structure.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, when it is necessary to install an optical fiber sensor on the polymer composite insulating layer of a formed circuit breaker under the cooperation of the test adjustment component, the six-axis robotic arm drives the drilling part of the first replacement execution end to approach the insulating layer, and a micro-injection port is opened by using a micro-invasive drill bit. Subsequently, the micro high-pressure fluid pump synchronously injects the polymer material diluted with a solvent and the optical fiber sensor into the injection port. Through the cooperation of the injection walking tube and the injection core end, the optical fiber sensor reaches the predetermined position under the push of the fluid. At the same time, the diluted polymer material fills the gap. After the injection is completed, the micro airbag push rod structure scrapes off the excess material, and the micro ultrasonic generating end starts to accelerate the volatilization of the solvent. Combined with the fluorescence tracer to monitor the curing degree of the material, it is ensured that the optical fiber sensor and the insulating layer are firmly fixed through molecular cross-linking. This micro-invasive implantation technology has extremely little damage to the insulating layer, ensuring the stability of the insulation performance, enabling the external distributed optical fiber temperature measurement data collector to form a three-dimensional temperature measurement network at the key parts of the insulating layer through the optical fiber sensors deployed by the six-axis robotic arm. The external distributed optical fiber temperature measurement data collector real-time feedbacks the temperature change trends of each point, realizing the efficient and accurate monitoring of the internal temperature of the insulating layer, and effectively giving early warnings of local overheating risks (such as the interface between the electrode and the insulating layer) in a timely manner.

[0019] 2. In the present invention, with the cooperation of the test adjustment component, the six-axis robotic arm moves to the replacement component along the X-axis guide rail and Y-axis guide rail at the top. Through the first self-locking magnetic connection end and the second self-locking magnetic connection end, different execution ends (such as the first replacement execution end and the second replacement execution end) can be quickly adsorbed or removed, realizing the efficient switching of functions such as drilling and wiring. This process requires no manual intervention. The robotic arm only needs to identify the type of docking slot through the vision sensor to accurately replace the end tool, greatly shortening the non-effective time in the test process and significantly improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front view structural schematic diagram of the breaker temperature rise test device with polymer composite insulation of the present invention; Figure 2 is the internal structural schematic diagram of the breaker temperature rise test device with polymer composite insulation of the present invention; Figure 3 is the structural schematic diagram of the test adjustment component in the breaker temperature rise test device with polymer composite insulation of the present invention; Figure 4 in the breaker temperature rise test device with polymer composite insulation of the present invention Figure 3 is the enlarged structural schematic diagram at position A; Figure 5 is the structural schematic diagram of the opening and closing solenoid valve body in the breaker temperature rise test device with polymer composite insulation of the present invention; Figure 6 in the breaker temperature rise test device with polymer composite insulation of the present invention Figure 5 is the enlarged structural schematic diagram at position C; Figure 7 is the structural schematic diagram of the clamping component in the breaker temperature rise test device with polymer composite insulation of the present invention; Figure 8 in the breaker temperature rise test device with polymer composite insulation of the present invention Figure 3 is the enlarged structural schematic diagram at position B; Figure 9 is the operation replacement structural schematic diagram of the replacement component and the test adjustment component in the breaker temperature rise test device with polymer composite insulation of the present invention.

[0021] In the figure: 100, experimental chamber; 200, cooling air duct structure; 300, replacement component; 301, mounting frame; 302, docking groove; 303, second replacement execution end; 304, second self-locking magnetic connection end; 400, test and adjustment component; 401, support frame; 402, Y-axis guide rail; 403, X-axis guide rail; 404, six-axis robotic arm; 405, first self-locking magnetic connection end; 406, docking and fixing clamp; 407, first replacement execution end; 408, fluid delivery pipe; 409, opening and closing solenoid valve body; 410, delivery cavity; 411, air delivery pipe; 412, microdrill bit; 413, micro airbag; 414, push rod structure; 415, fluid delivery chamber; 416, injection walking pipe; 417, injection core end; 418, chip suction pipe; 419, chip storage chamber; 420, walking chip suction pipe; 421, chip suction core end; 422, drilling component; 423, micro high-pressure fluid pump; 500, clamping component; 501, connecting and fixing frame; 502, servo motor; 503, pulley structure; 504, outer rotating frame; 505, bevel gear structure; 506, inner rotating frame; 507, second electromagnetic blocker; 508, first electromagnetic blocker; 509, flexible gripper; 600, temperature and humidity regulator. Specific embodiments

[0022] 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] In the embodiments of the present invention, refer to Figure 1 and Figure 2 As shown: The temperature rise test device for a circuit breaker with polymer composite insulation includes an experimental chamber 100 for simulating the narrow and enclosed environment inside a switchgear cabinet and a test and adjustment component 400 installed inside the experimental chamber 100 for real-time testing of the polymer composite material layer of the circuit breaker inside. Specifically: First, according to the size of the switchgear cabinet where the circuit breaker is actually installed, adjust the internal space of the experimental chamber 100, and divide it into narrow areas consistent with the switchgear cabinet through removable partitions to ensure that the distances around the circuit breaker after installation are the same as the actual working conditions. Subsequently, fix the circuit breaker to be tested in the center of the experimental chamber 100 through an insulating bracket to ensure that its installation angle and wiring direction are the same as those of the actual switchgear cabinet, and use the test and adjustment component 400 to perform real-time testing on the polymer composite material layer of the circuit breaker inside.

[0024] In some embodiments, according to Figures 1 - 6As shown in the figure, the test adjustment component 400 includes an automatic connection structure and a distributed temperature measurement structure. The automatic connection structure is used to automatically complete the connection between the test circuit and the circuit breaker. The automatic connection structure includes a six-axis robotic arm 404 and a positioning vision sensor. The six-axis robotic arm 404 is a micro-structure used to connect different execution ends according to different operations. The positioning vision sensor is a high-precision sensor used to identify the position of the circuit breaker interface to achieve precise connection of the test circuit. The distributed temperature measurement structure is used to monitor the temperature of the polymer composite layer of the circuit breaker in real time. The distributed temperature measurement module includes an optical fiber sensor, an external distributed optical fiber temperature measurement data collector, and a delivery channel 410. The delivery channel 410 is used to control the delivery of the optical fiber sensor according to the distribution rate. The optical fiber sensor is a micro optical fiber sensor, which is delivered through the delivery channel 410 and is used to be distributed at the key parts of the polymer composite layer of the circuit breaker. A minimally invasive drilling head 412 is installed outside the delivery channel 410. The external distributed optical fiber temperature measurement data collector is used to collect the temperature data of the optical fiber sensor.

[0025] A delivery fluid chamber 415 is provided inside the minimally invasive drilling head 412. An injection walking pipe 416 is connected to the side end of the delivery fluid chamber 415. The injection walking pipe 416 is located inside the end of the minimally invasive drilling head 412. Injection core ends 417 and chip suction core ends 421 are respectively provided on the bottom outer wall surface of the minimally invasive drilling head 412. The injection walking pipe 416 is connected to the injection core end 417.

[0026] A fluid delivery pipe 408 is connected to the top of the delivery fluid chamber 415. An opening and closing solenoid valve body 409 is installed outside the fluid delivery pipe 408. A micro high-pressure fluid pump 423 is installed at the side end of the fluid delivery pipe 408. A first replacement execution end 407 is installed at the side end of the micro high-pressure fluid pump 423. A docking fixing clip 406 is installed at the top side end of the first replacement execution end 407. A drilling part 422 is installed at the bottom of the first replacement execution end 407. A first self-locking magnetic connection end 405 is connected to the top side end of the first replacement execution end 407. The side end of the first self-locking magnetic connection end 405 is movably connected to the six-axis robotic arm 404. A micro ultrasonic generating end is installed at the bottom of the first replacement execution end 407, which is used to open an injection port on the surface of the insulating layer through the drilling part 422. The polymer material diluted with a solvent is synchronously injected from the fluid delivery pipe 408 and the optical fiber sensor from the delivery channel 410 through the micro high-pressure fluid pump 423, and sequentially passes through the injection walking pipe 416 and the injection core end 417. After the material is injected into the injection port, the injection port is operated to make the solvent volatilize and the material solidify, so that the optical fiber sensor is firmly fixed.

[0027] The inside of the minimally invasive drill bit 412 is provided with a push rod structure 414, which is composed of a push rod and a push slide cavity. The push rod is slidably installed inside the push slide cavity. A micro airbag 413 is connected to the side end of the push rod. The top end of the micro airbag 413 is communicated with an air guide pipe 411, and the air guide pipe 411 is communicated with an external high-pressure operation air pump.

[0028] The top end of the chip suction core end 421 is communicated with a walking chip suction pipe 420. The walking chip suction pipe 420 is located inside the end of the minimally invasive drill bit 412 and extends to be communicated with a chip storage chamber 419. The side end of the chip storage chamber 419 is communicated with a chip suction pipe 418, and the chip suction pipe 418 is communicated with an external high-pressure operation air pump.

[0029] The top end of the six-axis robotic arm 404 is slidably connected with an X-axis guide rail 403. The side end of the X-axis guide rail 403 is slidably connected with a Y-axis guide rail 402. The left and right side ends of the Y-axis guide rail 402 are tightly connected with a support frame 401 through a hoop block, and the support frame 401 is installed at the inner bottom end of the experimental cavity 100.

[0030] More specifically: First, the six-axis robotic arm 404 moves to the replacement component 300 on the back side of the experimental chamber 100 through the X-axis guide rail 403 and Y-axis guide rail 402 at the top. The docking and fixing clip 406 at the top of the six-axis robotic arm 404 aligns with the docking slot 302 on the left side of the mounting frame 301. The first self-locking magnetic connection end 405 adsorbs at the docking slot 302 on the left side, and the first replacement execution end 407 connected to the first self-locking magnetic connection end 405 is removed accordingly. At this time, if the function needs to be switched (such as from drilling operation to circuit connection), the six-axis robotic arm 404 can move to the docking slot 302 on the right side and be synchronously replaced with the second replacement execution end 303. The second self-locking magnetic connection end 304 at its top quickly docks with the six-axis robotic arm 404 to achieve the second-level switching of the end tool. When a fiber optic sensor needs to be installed in the formed polymer composite insulation layer of the circuit breaker, first, the positioning vision sensor is used to identify the target points on the surface of the insulation layer (such as near the contact, at the sudden change of the insulation layer thickness). Then, the six-axis robotic arm 404 drives the drilling part 422 of the first replacement execution end 407 close to the insulation layer, so that the drilling part 422 opens a micro-injection port with a diameter (such as ≤0.5 mm) on the surface of the insulation layer. The drilling depth is precisely controlled by the stroke of the six-axis robotic arm 404. After the drilling is completed, the micro high-pressure fluid pump 423 is started, and the polymer material diluted with a solvent, such as epoxy resin solution, is pressed into the fluid delivery chamber 415 through the fluid delivery pipe 408. At the same time, the fiber optic sensor is conveyed from the delivery channel 410 to the inside of the micro-invasive drilling head 4,12. After the two fluids converge in the injection walking pipe 416, they are synchronously injected into the injection port through the injection core end 417: so that the fiber optic sensor reaches the predetermined position under the push of the fluid, maintaining a vertical or spiral orientation, and the diluted polymer material fills the gap between the injection port and the fiber optic sensor to form a wrapping layer. After the injection is completed, the opening and closing solenoid valve body 409 closes the fluid delivery path, and the micro airbag 413 is inflated through the air guide pipe 411, and the push rod structure 414 scrapes the excess material on the surface of the injection port flat. At this time, the micro ultrasonic generating end is started, and the six-axis robotic arm 404 is used to drive the micro ultrasonic generating end to align with the injection port, and segmented power control is adopted, so that the micro ultrasonic generating end outputs a power fluctuation of ≤±5% within the temperature range of -20°C to 60°C, thereby accelerating the rapid volatilization of the solvent when heated. As the solvent volatilizes, the polymer material gradually solidifies, and the fiber optic sensor is firmly fixed in the insulation layer through intermolecular cross-linking to form an integral structure. Among them, a fluorescent tracer is added to the diluted polymer material, and the curing degree change of the material is synchronously monitored through the fiber optic sensor. When the fluorescence intensity attenuation rate reaches the preset threshold (such as 85%), it is automatically determined that the curing is completed. During the injection operation, an external high-pressure operation air pump applies negative pressure to the chip storage chamber 419 through the chip suction pipe 418, and the insulation layer chips generated by drilling are sucked into the chip storage chamber 419 through the chip suction core end 421 and the walking chip suction pipe 420.To avoid debris accumulation from affecting subsequent tests or contaminating the experimental chamber environment, when it is necessary to connect the test circuit, the six-axis robotic arm 404 is replaced with the second replacement execution end 303. The positioning vision sensor is used to identify the shape, position, and angle of the wiring terminals of the circuit breaker (such as the plum blossom contact and bolt holes), so that the six-axis robotic arm 404 adjusts the fixture posture of the second replacement execution end 303 according to the preset program, accurately grabs the test cable connector, and applies an appropriate torque to the terminal to complete the connection, ensuring good electrical contact and not damaging the surface plating of the terminal. After the fiber optic sensor is deployed, the external distributed fiber optic temperature measurement data acquisition device starts to work, and the temperature signals of each fiber are monitored in real time through optical time domain reflectometry. Through the above operations, the fiber optic sensors are distributed at key parts of the insulating layer (such as the interface between the conductive rod and the insulating layer, and the root of the umbrella skirt), forming a three-dimensional temperature measurement network that can real-time feedback the temperature change trend of each point. Overall, through the six-axis robotic arm 404 equipped with the second self-locking magnetic connection end 304 or the first self-locking magnetic connection end 405, functions such as drilling and wiring can be switched in seconds, and the whole process runs automatically, improving the test efficiency. The ultrasonic-assisted minimally invasive drilling head 412 combined with fluid synchronous injection causes minimal damage to the insulating layer, enabling homogeneous material integration curing. The distributed fiber optic sensor realizes real-time monitoring of the three-dimensional temperature field inside the insulating layer, accurately locates local hot spots, reduces the missed detection rate, not only realizes accurate monitoring of the temperature inside the polymer composite insulating layer, but also significantly improves the test efficiency and reliability.

[0031] In some embodiments, according to Figure 1 、 Figure 2 Figure 8 and Figure 9 As shown, a replacement component 300 is installed on the surface of the inner back wall of the experimental chamber 100. The replacement component 300 includes an installation frame 301. Multiple sets of docking grooves 302 are formed on the surface of the installation frame 301. In this embodiment, two sets of docking grooves are taken as an example, and the two sets of docking grooves are distributed in a left-right relationship on the installation frame 301. Among them, a second replacement execution end 303 is connected to the set of docking grooves 302 on the right. The second replacement execution end 303 is used to automatically complete the connection between the test circuit and the circuit breaker. The top side of the second replacement execution end 303 is connected with a second self-locking magnetic connection end 304, which is used to connect and install with the six-axis robotic arm 404.

[0032] The six-axis robotic arm 404 translates along the track at the bottom of the experimental chamber 100 through the X-axis guide rail 403 and the Y-axis guide rail 402 at the top and moves to the front of the replacement assembly 300 on the back wall. At this time, the vision sensor at the top of the six-axis robotic arm 404 collects images of the two docking slots 302 on the surface of the mounting frame 301 to identify the types of execution ends corresponding to each docking slot 302 (such as drilling ends, wiring ends, etc.). Then, if the first replacement execution end 407 (for drilling operations of fiber optic sensor implantation) is currently installed on the six-axis robotic arm 404 and needs to be switched to the second replacement execution end 303 (for circuit connection), the six-axis robotic arm 404 moves above the corresponding left docking slot 302, aligns the first self-locking magnetic connection end 405 at the top with the magnetic attraction interface in the docking slot 302, and through electromagnetic control, the first self-locking magnetic connection end 405 is released from the adsorption with the docking fixed clip 406. The first self-locking magnetic connection end 405 and the first replacement execution end 407 connected thereto are installed in the docking slot 302. After that, the six-axis robotic arm 404 moves horizontally to the right docking slot 302 where the second replacement execution end 303 is located, aligns the second self-locking magnetic connection end 304 with the magnetic attraction interface at the top of the robotic arm, and quickly connects the second replacement execution end 303 through the electromagnetic attraction force.The six-axis robotic arm 404 drives the second replacement execution end 303 to lift slightly to verify the firmness of the connection (such as detecting the connection force through a torque sensor), ensuring no looseness during the switching process. After completing the end switching, the six-axis robotic arm 404 scans the wiring terminal of the circuit breaker again through a vision sensor to generate three-dimensional coordinate data, enabling the six-axis robotic arm 404 to drive the clamp of the second replacement execution end 303 to adjust its posture (such as rotation, tilting) according to the preset wiring procedure, so that the test cable connector is accurately aligned with the terminal hole position. Then, the six-axis robotic arm 404 applies a preset axial thrust to insert the cable connector into the terminal and trigger an internal torque wrench to complete the fastening according to the standard torque. During this process, the built-in pressure sensor monitors the contact force in real time to avoid terminal deformation caused by over-tightening or poor contact caused by over-looseness. After the circuit connection is completed, if it is necessary to switch the end again (such as switching back from the wiring mode to the drilling mode), the six-axis robotic arm 404 repeats the above steps to return the second replacement execution end 303 to the original docking slot 302 and grab other required ends. The whole automatically records the time, type, and operation parameters of each end replacement through an external control system to form a maintenance log, which is convenient for tracing the usage frequency and wear condition of the end. Among them, the installation frame 301 can integrate execution ends with different functions (such as a drilling part 422, a wiring clamp, a thermal imaging probe, etc.), align with the magnetic connection end through a unified docking slot 302, and the docking slot 302 and its respective execution ends adopt a keyway and boss matching structure to ensure that only the corresponding type of end can be correctly inserted (such as the docking fixing clip 406 of the drilling end is circular, and the wiring end is square). Overall, the six-axis robotic arm 404 realizes the second-level switching of the end tool through the magnetic attraction structure of the first self-locking magnetic connection end 405, the second self-locking magnetic connection end 304, and the docking fixing clip 406, without manual intervention, improving the switching efficiency of the test process.

[0033] In some embodiments, according to Figure 1 、 Figure 2 and Figure 7 shown, a clamping assembly 500 is installed inside the experimental chamber 100. The clamping assembly 500 includes a connecting fixed frame 501. A servo motor 502 is installed at the side end of the connecting fixed frame 501, and the output end of the servo motor 502 is connected with a pulley structure 503.

[0034] An first electromagnetic blocker 508 is installed outside the output end of the servo motor 502. The other end of the first electromagnetic blocker 508 is connected with an outer rotating frame 504. The other end of the pulley structure 503 is connected with a bevel gear structure 505. The other end of the bevel gear structure 505 is connected with a second electromagnetic blocker 507. The second electromagnetic blocker 507 is connected with an inner rotating frame 506. The inner rotating frame 506 is coaxially sleeved inside the outer rotating frame 504. Flexible grippers 509 are symmetrically installed on the inner wall surface of the inner rotating frame 506.

[0035] The circuit breaker to be tested is placed horizontally at a preset position in the experimental chamber 100 and clamped by the flexible clamp 509. At this time, the servo motor 502 is in standby state, and the first electromagnetic blocker 508 and the second electromagnetic blocker 507 are both in the power-off unlocked state, allowing the outer rotating frame 504 and the inner rotating frame 506 to rotate freely. After that, the servo motor 502 is started, the first electromagnetic blocker 508 is locked, and the power is transmitted to the bevel gear structure 505 through the pulley structure 503. The bevel gear structure 505 converts the horizontal rotation force into a vertical torque, driving the inner rotating frame 506 to rotate inside the outer rotating frame 504. During this process, the flexible clamp 509 on the inner rotating frame 506 has an internal pressure sensor that monitors the contact force in real time. Then, when the circuit breaker to be tested needs to change its position to facilitate the operation of the above-mentioned test adjustment component 400, the second electromagnetic blocker 508 is locked. The first electromagnetic blocker 507 is locked, the first electromagnetic blocker 508 is released, and the outer rotating frame 504 is driven to rotate by the servo motor 502, so that the outer rotating frame 504 synchronously drives the inner rotating frame 506 to rotate, further making the circuit breaker to be tested more compatible with the operation of the test adjustment component 400, and the flexible clamp 509 can adopt a composite structure of silicone rubber and spring, which can adaptively compensate for slight shape differences on the surface of the circuit breaker to avoid local stress concentration. After the test is completed, the first electromagnetic blocker 508 and the second electromagnetic blocker 507 are powered off and unlocked, and the servo motor 502 rotates in the opposite direction, driving the inner rotating frame 506 and the outer rotating frame 504 to separate and reset, and the elastic element built into the flexible clamp 509 automatically rebounds, so that the clamp is out of contact with the surface of the circuit breaker. The entire release process does not require manual intervention. The operator can directly remove the circuit breaker or replace a new test sample to prepare for the next round of testing.

[0036] In some embodiments, according to Figure 1 and Figure 2 As shown, the experimental chamber 100 is equipped with environmental simulation facilities, which include a temperature and humidity regulator 600, an air pressure regulator and a cooling air duct structure 200. The temperature and humidity regulator 600 is used to adjust the temperature and humidity in the experimental chamber 100, and the air pressure regulator is used to adjust the air pressure in the experimental chamber 100 to simulate environmental parameters under actual working conditions such as different altitudes. The cooling air duct structure 200 is evenly distributed inside the experimental chamber 100 through the air duct, and is used to dynamically adjust heat dissipation according to real-time temperature rise.

[0037] More specifically: During the above operation, the temperature and humidity regulator 600 at the top of the experimental chamber 100 is started, and the temperature in the chamber is adjusted to the target value (such as 35°C) through the heating or cooling device. Water vapor is released through the ultrasonic humidity generator in the temperature and humidity regulator 600 to make the relative humidity reach a preset level (such as 75%) to simulate a humid indoor switchgear environment. If a high-altitude scenario needs to be simulated, the air pressure in the chamber can be lowered to the corresponding value through the air pressure regulation module.

[0038] The wiring diagrams of the second electromagnetic blocker 507, the first electromagnetic blocker 508, the fiber optic sensor, the external distributed fiber optic temperature measurement data collector, the micro ultrasonic generator, the vision sensor, the pressure sensor and the stress sensor in the present invention belong to the common general knowledge in the art, and their working principles are already known technologies. Their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the second electromagnetic blocker 507, the first electromagnetic blocker 508, the fiber optic sensor, the external distributed fiber optic temperature measurement data collector, the micro ultrasonic generator, the vision sensor, the pressure sensor and the stress sensor will not be explained in detail.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. 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. The temperature rise test device for a circuit breaker with polymer composite insulation, characterized in that: Comprising: An experimental chamber (100); A test and adjustment component (400) installed inside the experimental chamber (100); The test and adjustment component (400) includes an automatic connection structure and a distributed temperature measurement structure. The automatic connection structure is used to automatically complete the connection between the test circuit and the circuit breaker, and the distributed temperature measurement structure is used to monitor the temperature of the polymer composite layer of the circuit breaker in real time; The automatic connection structure includes a six-axis robotic arm (404) and a positioning vision sensor. The six-axis robotic arm (404) is used to connect different execution ends according to different operations, and the positioning vision sensor is used to identify the position of the circuit breaker interface to achieve precise connection of the test circuit; The distributed temperature measurement structure includes an optical fiber sensor, an external distributed optical fiber temperature measurement data collector, and a guiding channel (410). The guiding channel (410) is used to control the transportation of the optical fiber sensor according to the distribution rate. A minimally invasive drilling head (412) is installed outside the guiding channel (410), and the external distributed optical fiber temperature measurement data collector is used to collect the temperature data of the optical fiber sensor.

2. The breaker temperature rise test device with polymer composite insulation according to claim 1, characterized in that: A fluid guiding chamber (415) is provided inside the minimally invasive drilling head (412). A fluid injection and walking pipe (416) is connected to the side end of the fluid guiding chamber (415). The fluid injection and walking pipe (416) is located inside the end of the minimally invasive drilling head (412). An injection core end (417) and a chip suction core end (421) are respectively provided on the bottom outer wall surface of the minimally invasive drilling head (412). The fluid injection and walking pipe (416) is connected to the injection core end (417).

3. The breaker temperature rise test device with polymer composite insulation according to claim 2, characterized in that: A fluid delivery pipe (408) is connected to the top of the fluid guiding chamber (415). An opening and closing solenoid valve body (409) is installed outside the fluid delivery pipe (408). A micro high-pressure fluid pump (423) is installed on the side end of the fluid delivery pipe (408). A first replacement execution end (407) is installed on the side end of the micro high-pressure fluid pump (423). A docking fixing clip (406) is installed on the top side end of the first replacement execution end (407). A drilling part (422) is installed on the bottom of the first replacement execution end (407). A first self-locking magnetic connection end (405) is connected to the top side end of the first replacement execution end (407). The side end of the first self-locking magnetic connection end (405) is movably connected to the six-axis robotic arm (404).

4. The breaker temperature rise test device with polymer composite insulation according to claim 1, characterized in that: A push rod structure (414) is provided inside the minimally invasive drilling head (412). The push rod structure (414) includes a push sliding cavity and a push rod slidably installed in the push sliding cavity.

5. The breaker temperature rise test device with polymer composite insulation according to claim 2, characterized in that: The top end of the chip suction core end (421) is connected to a walking chip suction pipe (420). The walking chip suction pipe (420) is located inside the end of the minimally invasive drilling head (412).

6. The breaker temperature rise test device with polymer composite insulation according to claim 2, characterized in that: A replacement component (300) is installed on the rear inner wall of the experimental chamber (100). The replacement component (300) includes an installation frame (301). At least two groups of docking grooves (302) are provided on the surface of the installation frame (301). One group of docking grooves is connected to a second replacement execution end (303).

7. The breaker temperature rise test device with polymer composite insulation according to claim 1, characterized in that: The top of the six-axis robotic arm (404) is slidably connected to an X-axis guide rail (403), and the side end of the X-axis guide rail (403) is slidably connected to a Y-axis guide rail (402).

8. The breaker temperature rise test device with polymer composite insulation according to claim 1, characterized in that: Inside the experimental chamber (100), a clamping assembly (500) for clamping a circuit breaker is installed. The clamping assembly (500) includes a connecting fixed frame (501). On one outer side surface of the connecting fixed frame (501), a servo motor (502) for driving the clamping assembly (500) to rotate is installed. The servo motor (502) is connected to the inner wall of the experimental chamber (100). On one side surface inside the connecting fixed frame (501), a flexible gripper (509) is installed.

9. The breaker temperature rise test device with polymer composite insulation according to claim 8, characterized in that: Outside the output end of the servo motor (502), a first electromagnetic blocker (508) is installed. On the side end of the first electromagnetic blocker (508), an outer rotating frame (504) is installed. The servo motor (502) is drivingly connected to a bevel gear structure (505). On the side end of the bevel gear structure (505), a second electromagnetic blocker (507) is connected. The second electromagnetic blocker (507) is connected to an inner rotating frame (506). The flexible grippers (509) are symmetrically installed on the inner wall of the inner rotating frame (506).

10. The breaker temperature rise test device with polymer composite insulation according to claim 1, characterized in that: The experimental chamber (100) is equipped with environmental simulation facilities. The environmental simulation facilities include a temperature and humidity regulator (600), a pressure regulator, and a cooling air duct structure (200).

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