Temperature rise test device for circuit breakers with polymer composite insulation

Abstract

The present invention relates to the field of electrical components, and specifically discloses a temperature-rise test device for a circuit breaker with polymer composite insulation. The device comprises a test chamber and a test adjustment assembly mounted inside the test chamber. The test chamber is used to simulate the narrow, enclosed environment inside a switch cabinet. A micro-injection port is opened using a minimally invasive drilling head in cooperation with the test adjustment assembly. Subsequently, a micro high-pressure fluid pump simultaneously injects a polymer material diluted with a solvent and an optical fiber sensor into the injection port. Through the cooperation of an injection running tube and an injection core end, the optical fiber sensor is pushed to a predetermined position by the fluid, while the diluted polymer material fills the gap. This allows the optical fiber sensors deployed by a six-axis robotic arm to form a three-dimensional temperature measurement network at key locations of the insulation layer, thereby achieving efficient and accurate monitoring of the temperature inside the insulation layer and effectively providing timely warning of local overheating risks.

Description

Technical Field

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

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified timeframe. During a short circuit, the high current magnetic field generated by the short circuit overcomes the reaction spring, causing the release to activate the operating mechanism and instantaneously trip the switch. Alternatively, during an overload, the current increases, generating increased heat and causing the bimetallic strip to deform to a certain degree, which in turn triggers the operating mechanism to instantaneously trip the switch.

[0003] In the prior art, for example, the Chinese patent application CN117443783A, titled "A Circuit Breaker Testing Device," includes a test bench, a feeding assembly, an electrical variable detection assembly, a re-inspection assembly, a distribution assembly, and a screening assembly. A vibration table is provided at the end of the side wall on one side of the test bench. The feeding assembly includes a vibration disk, a feeding element, and a transmission track. The bottom surface of the vibration disk is fixedly mounted on the top surface of the vibration table. The feeding element is mounted on the top surface of the test bench adjacent to one end of the vibration table, and the length direction of the feeding element is perpendicular to the length direction of the test bench. In the above scheme, this wire pressing device uses the test bench, feeding assembly, electrical variable detection assembly, and re-inspection assembly to conduct comprehensive inspection and testing of the circuit breaker to ensure its normal operation and safety. Through the coordinated action of equipment such as the vibration disk, the feeding track, and the reversing hook, the smooth transmission and positioning of the circuit breaker can be achieved. The use of electrical variable detection components and re-inspection components can perform dielectric testing, short-circuit testing and re-inspection on circuit breakers to detect and eliminate abnormal circuit breakers, ensure product quality and safety, improve production efficiency, ensure product quality and safety, and realize automated production, thereby improving production efficiency and saving labor costs.

[0004] Currently, traditional temperature rise testing relies 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, making it difficult to warn of local overheating risks (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, so as to solve the problem proposed in the above background technology that 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 local overheating risks (such as at the interface between the electrode and the insulation layer).

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] Temperature rise test device for circuit breakers with polymer composite insulation, including:

[0008] Experimental chamber: The experimental chamber is used to simulate the narrow and closed environment inside the switch cabinet.

[0009] A test and adjustment component is installed inside the experimental chamber; the test and adjustment component is used to perform real-time testing on the polymer composite material layer of the internal circuit breaker.

[0010] The test 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. The distributed temperature measurement structure is used to monitor the temperature of the polymer composite material layer of the circuit breaker in real time.

[0011] 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 terminals according to different operations. The positioning vision sensor is used to identify the position of the circuit breaker interface to achieve accurate connection of the test circuit.

[0012] The distributed temperature measurement structure includes an optical fiber sensor, an external distributed optical fiber temperature measurement data collector and a guide cavity. The guide cavity is used to control the delivery of the optical fiber sensor according to the distribution rate. A minimally invasive drilling head is installed on the outside of the guide cavity. The external distributed optical fiber temperature measurement data collector is used to collect temperature data from the optical fiber sensor.

[0013] Preferably, a fluid guiding chamber is opened inside the minimally invasive drilling head, and the side end of the fluid guiding chamber is connected to an injection running tube, and the injection running tube is located inside the end of the minimally invasive drilling head. The bottom outer wall surface of the minimally invasive drilling head is respectively opened with an injection core end and a chip suction core end, and the injection running tube and the injection core end are connected.

[0014] Preferably, the top of the fluid guiding chamber is connected to a fluid guiding pipe, an opening and closing electromagnetic valve body is installed on the outside of the fluid guiding pipe, a micro high-pressure fluid pump is installed on the side end of the fluid guiding pipe, a first replacement execution end is installed on the side end of the micro high-pressure fluid pump, a docking fixing card is installed on the top side end of the first replacement execution end, a drilling part is installed on the bottom of the first replacement execution end, the top side end of the first replacement execution end is connected to a first self-locking magnetic connection end, and the side end of the first self-locking magnetic connection end is movably connected to the six-axis robotic arm.

[0015] Preferably, a push rod structure is provided inside the minimally invasive drilling head, and the push rod structure includes a push sliding cavity and a push rod slidably installed in the push sliding cavity.

[0016] Preferably, the top end of the chip suction core is connected to a traveling chip suction tube, and the traveling chip suction tube is located inside the end of the minimally invasive drilling head.

[0017] Preferably, a replacement component is installed on the inner rear wall of the experimental chamber, and the replacement component includes a mounting frame, and at least two groups of docking grooves are opened on the surface of the mounting frame, and the interior of one group of docking grooves is connected to the second replacement execution end.

[0018] Preferably, the top end of the six-axis robotic arm is slidably connected to an X-axis guide rail, and the side end of the X-axis guide rail is slidably connected to a Y-axis guide rail.

[0019] Preferably, a clamping assembly for clamping the circuit breaker is installed inside the experimental chamber, and the clamping assembly includes a connecting frame, one of the outer side surfaces of the connecting frame is provided with a servo motor for driving the clamping assembly to rotate, the servo motor is connected to the inner wall of the experimental chamber, and one of the side surfaces inside the connecting frame is provided with a flexible clamper.

[0020] Preferably, a first electromagnetic blocker is installed outside the output end of the servo motor, an outer rotating frame is installed on the side end of the first electromagnetic blocker, the servo motor is transmission-connected with a bevel gear structure, the side end of the bevel gear structure is connected with a second electromagnetic blocker, the second electromagnetic blocker is connected with an inner rotating frame, and the flexible clamp is symmetrically arranged on the inner wall of the inner rotating frame.

[0021] Preferably, the experimental chamber is equipped with environmental simulation facilities, which include a temperature and humidity regulator, an air pressure regulator and a cooling air duct structure.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, when it is necessary to install an optical fiber sensor on the polymer composite insulation layer of the 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 close to the insulation layer, and uses the minimally invasive drilling head to open a micro injection port. Subsequently, the micro high-pressure fluid pump simultaneously injects the polymer material diluted with the solvent and the optical fiber sensor into the injection port. Through the cooperation of the injection running tube and the injection core end, the optical fiber sensor is pushed to the predetermined position by the fluid, and the diluted polymer material fills the gap at the same time. After the injection is completed, the micro airbag pushes the rod structure to scrape off the excess material, and the micro super The acoustic wave generating end starts to accelerate the evaporation of the solvent, and the fluorescent tracer is combined to monitor the curing degree of the material to ensure that the optical fiber sensor and the insulation layer are firmly fixed through molecular cross-linking. This minimally invasive implantation technology causes minimal damage to the insulation layer, ensuring the stability of the insulation performance. The external distributed optical fiber temperature measurement data collector forms a three-dimensional temperature measurement network at key parts of the insulation layer through the optical fiber sensors deployed by the six-axis robotic arm. The external distributed optical fiber temperature measurement data collector provides real-time feedback on the temperature change trend of each point, realizing efficient and accurate monitoring of the internal temperature of the insulation layer, and effectively providing timely warnings for local overheating risks (such as at the interface between the electrode and the insulation layer).

[0024] 2. In the present invention, with the cooperation of the test adjustment component, the six-axis robotic arm is moved to the replacement component with the help of the X-axis guide rail and the Y-axis guide rail on 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 to achieve efficient switching of functions such as drilling and wiring. This process does not require human intervention. The robotic arm only needs to identify the docking slot type through the visual sensor to complete the precise replacement of the end tool, which greatly shortens the non-effective time in the test process and significantly improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main structure of the temperature rise test device for a circuit breaker with polymer composite insulation according to the present invention;

[0026] Figure 2 Schematic diagram of the internal structure of the temperature rise test device for a circuit breaker with polymer composite insulation according to the present invention;

[0027] Figure 3 This is a schematic structural diagram of a test adjustment component in a temperature rise test device for a circuit breaker with polymer composite insulation according to the present invention;

[0028] Figure 4 The invention relates to a circuit breaker temperature rise test device with polymer composite insulation Figure 3 A schematic diagram of the enlarged structure at point A;

[0029] Figure 5 This is a schematic structural diagram of the opening and closing electromagnetic valve body in the temperature rise test device for a circuit breaker with polymer composite insulation according to the present invention;

[0030] Figure 6 The invention relates to a circuit breaker temperature rise test device with polymer composite insulation Figure 5 Schematic diagram of the enlarged structure at C;

[0031] Figure 7 This is a schematic structural diagram of a clamping assembly in a temperature rise test device for a circuit breaker with polymer composite insulation according to the present invention;

[0032] Figure 8 The invention relates to a circuit breaker temperature rise test device with polymer composite insulation Figure 3 A schematic diagram of the enlarged structure at point B;

[0033] Figure 9 The present invention is a schematic diagram of the structure for replacing components and testing and adjusting components in the temperature rise test device for a circuit breaker with polymer composite insulation.

[0034] In the figure: 100, experimental chamber; 200, cooling air duct structure; 300, replacement component; 301, installation frame; 302, docking slot; 303, second replacement execution end; 304, second self-locking magnetic connection end; 400, test 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 fixing fixture; 407, first replacement execution end; 408, fluid guide tube; 409, opening and closing electromagnetic valve body; 410, guide channel; 411, air guide tube; 412, minimally invasive drilling head; 413 , micro airbag; 414, push rod structure; 415, fluid guide chamber; 416, injection walking tube; 417, injection core end; 418, chip suction tube; 419, chip storage chamber; 420, walking chip suction tube; 421, chip suction core end; 422, drilling part; 423, micro high-pressure fluid pump; 500, clamping assembly; 501, connecting 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 clamper; 600, temperature and humidity regulator. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the embodiment of the present invention, referring to Figure 1 and Figure 2 As shown: The temperature rise test device for a circuit breaker with polymer composite insulation includes a test chamber 100 for simulating the narrow and closed environment inside a switch cabinet and a test adjustment component 400 installed inside the test chamber 100 for performing real-time testing on the polymer composite material layer of the circuit breaker inside.

[0037] Specifically: First, the internal space of the experimental chamber 100 is adjusted according to the size of the switch cabinet in which the circuit breaker is actually installed. It is divided into a narrow area consistent with the switch cabinet by a removable partition, ensuring that the spacing on all sides of the circuit breaker after installation is the same as the actual working conditions. Then, the circuit breaker under test is fixed in the center of the experimental chamber 100 by an insulating bracket, ensuring that its installation angle and wiring direction are consistent with the actual switch cabinet. The test adjustment component 400 is used to perform real-time testing on the polymer composite material layer of the internal circuit breaker.

[0038] In some embodiments, according to Figures 1-6As shown, the test adjustment assembly 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, a miniature structure, which is used to connect different execution terminals according to different operations. The positioning visual sensor is a high-precision sensor that is 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 circuit breaker's polymer composite layer in real time. The distributed temperature measurement module includes an optical fiber sensor, an external distributed optical fiber temperature measurement data collector, and a guide channel 410. The guide 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 transported through the guide channel 410 and distributed in key areas of the circuit breaker's polymer composite layer. A minimally invasive drilling head 412 is installed outside the guide channel 410. The external distributed optical fiber temperature measurement data collector is used to collect temperature data from the optical fiber sensor.

[0039] A fluid guiding chamber 415 is provided inside the minimally invasive drilling head 412, and the side end of the fluid guiding chamber 415 is connected to an injection running pipe 416. The injection running 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, and the injection running pipe 416 and the injection core end 417 are connected.

[0040] The top of the fluid guide chamber 415 is connected to a fluid guide pipe 408, an opening and closing electromagnetic valve body 409 is installed on the outside of the fluid guide pipe 408, a micro high-pressure fluid pump 423 is installed on the side end of the fluid guide pipe 408, a first replacement execution terminal 407 is installed on the side end of the micro high-pressure fluid pump 423, a docking fixing clamp 406 is installed on the top side end of the first replacement execution terminal 407, a drilling member 422 is installed on the bottom of the first replacement execution terminal 407, and a first self-locking magnetic connection terminal 405 is connected to the top side end of the first replacement execution terminal 407. The side end of the end 405 is movably connected to the six-axis robotic arm 404, and a miniature 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 a drilling member 422, and synchronously inject the polymer material diluted with the solvent from the fluid guide tube 408 and the optical fiber sensor from the guide cavity 410 through a miniature high-pressure fluid pump 423, and pass through the injection running tube 416 and the injection core end 417 in turn, and after the material is driven into the injection port, the injection port is operated to make the material solidify after the solvent evaporates, thereby firmly fixing the optical fiber sensor.

[0041] A push rod structure 414 is provided inside the minimally invasive drilling head 412. The push rod structure 414 consists of a push rod and a push sliding cavity. The push rod is slidably installed inside the push sliding cavity. The side end of the push rod is connected to a micro airbag 413. The top end of the micro airbag 413 is connected to an air guide tube 411, and the air guide tube 411 is connected to an external high-pressure operating air pump.

[0042] The top end of the chip suction core end 421 is connected to a traveling chip suction tube 420, which is located inside the end of the minimally invasive drilling head 412 and extends to connect to a chip storage chamber 419. The side end of the chip storage chamber 419 is connected to a chip suction tube 418, which is connected to an external high-pressure operating air pump.

[0043] The top of the six-axis robotic arm 404 is slidably connected to the X-axis guide rail 403, the side end of the X-axis guide rail 403 is slidably connected to the Y-axis guide rail 402, and the left and right side ends of the Y-axis guide rail 402 are fastened to the support frame 401 through hoops, and the support frame 401 is installed at the bottom end of the interior of the experimental chamber 100.

[0044] To be more specific: First, the six-axis robot 404 moves to the replacement component 300 on the back side of the experimental chamber 100 through the X-axis guide rail 403 and the Y-axis guide rail 402 on the top, and the docking fixing card 406 on the top of the six-axis robot 404 is aligned with the docking slot 302 on the left side of the installation frame 301. The first self-locking magnetic connection end 405 is adsorbed on the docking slot 302 on the left, and the first replacement execution end 407 connected to the first self-locking magnetic connection end 405 is removed. At this time, if it is necessary to switch functions (such as from drilling operation to circuit connection), the six-axis robot 404 can be moved to the docking slot 302 on the right and synchronously replaced with the second replacement execution end. The second self-locking magnetic connection end 304 at the top of the end 303 is quickly docked with the six-axis robot arm 404, realizing the switching of the end tool in seconds. When it is necessary to install an optical fiber sensor in the formed polymer composite insulation layer of the circuit breaker, the target point on the surface of the insulation layer (such as near the contact or where the thickness of the insulation layer suddenly changes) is first identified by the positioning visual sensor. Then, the six-axis robot arm 404 drives the drilling member 422 of the first replacement execution end 407 close to the insulation layer, so that the drilling member 422 opens a hole with a diameter (such as ≤0.5mm) on the surface of the insulation layer. The micro injection port, 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 to press the polymer material diluted with solvent, such as epoxy resin solution, into the guiding fluid chamber 415 through the fluid guide tube 408. At the same time, the optical fiber sensor is transported from the guiding cavity 410 to the inside of the minimally invasive drilling head 412. After the two fluids merge in the injection running tube 416, they are synchronously injected into the injection port through the injection core end 417: so that the optical fiber sensor reaches the predetermined position under the push of the fluid, maintains a vertical or spiral direction, and makes the diluted polymer material fill the gap between the injection port and the optical fiber sensor to form a wrapping layer. After the injection is completed, the electromagnetic valve body 409 is opened and closed to close the fluid guide path, the micro airbag 413 is inflated through the air guide tube 411, and the push rod structure 414 scrapes the excess material on the surface of the injection port. At this time, the micro ultrasonic generator The 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. The segmented power control is adopted to make the output power fluctuation of the micro ultrasonic generating end within the temperature range of -20℃ to 60℃ ≤±5%, thereby accelerating the rapid volatilization of the solvent by heat. As the solvent evaporates, the polymer material gradually solidifies, and the optical fiber sensor is firmly fixed in the insulation layer through the intermolecular cross-linking effect to form an integrated structure. In particular, a fluorescent tracer is added to the diluted polymer material, and the change in the curing degree of the material is synchronously monitored by the optical fiber sensor. When the fluorescence intensity decay rate reaches a preset threshold (such as 85%), it is automatically determined that the curing is completed. At the same time as the injection operation, the external high-pressure working air pump applies negative pressure to the chip storage chamber 419 through the chip suction pipe 418. The insulation layer debris generated by drilling is sucked into the chip storage chamber 419 through the chip suction core end 421 and the walking chip suction pipe 420.To prevent debris accumulation from affecting subsequent tests or polluting the experimental chamber environment, when the test circuit needs to be connected, the six-axis robot arm 404 is replaced by the second replacement execution terminal 303, and the positioning visual sensor is used to identify the shape, position and angle of the circuit breaker terminal (such as plum blossom contact, bolt hole position), so that the six-axis robot arm 404 adjusts the clamp posture of the second replacement execution terminal 303 according to the preset program, accurately grasps the test cable connector, and applies appropriate torque to the terminal to complete the connection, ensuring good electrical contact without damaging the terminal surface coating. After the fiber optic sensor is deployed, the external distributed fiber optic temperature measurement data collector starts working, and monitors the temperature signal of each optical fiber in real time through optical time domain reflection. The fiber optic sensor is distributed on the insulation through the above operation. A three-dimensional temperature measurement network is formed at key locations of the layer (such as the interface between the conductive rod and the insulation layer, and the base of the shed skirt), which can provide real-time feedback on the temperature change trend at each point. The entire six-axis robotic arm 404 is combined with the second self-locking magnetic connection end 304 or the first self-locking magnetic connection end 405 to achieve second-level switching between drilling and wiring functions. The entire process is automated, which improves testing efficiency. The ultrasonic-assisted minimally invasive drilling head 412 is combined with synchronous fluid injection to minimize damage to the insulation layer. The use of homogeneous materials for integrated curing allows for real-time monitoring of the three-dimensional temperature field inside the insulation layer, accurately locating local hotspots and reducing the missed detection rate. This not only achieves accurate monitoring of the temperature inside the polymer composite insulation layer, but also significantly improves testing efficiency and reliability.

[0045] In some embodiments, according to Figure 1 、 Figure 2 Figure 8 and Figure 9 As shown, a replacement component 300 is installed on the inner back wall surface of the experimental chamber 100, and the replacement component 300 includes a mounting frame 301. The surface of the mounting frame 301 is provided with multiple groups of docking slots 302. In this embodiment, two groups of docking slots are taken as an example. The two groups of docking slots are distributed on the mounting frame 301 in a left-right relationship, wherein a group of docking slots 302 on the right is connected to a second replacement execution terminal 303, and the second replacement execution terminal 303 is used to automatically complete the connection between the test circuit and the circuit breaker. The top side end of the second replacement execution terminal 303 is connected to a second self-locking magnetic connection end 304, which is used to be connected and installed with the six-axis robot arm 404.

[0046] The six-axis robot arm 404 moves horizontally along the track at the bottom of the experimental chamber 100 through the top X-axis guide rail 403 and the Y-axis guide rail 402 to the front of the replacement component 300 on the back wall. At this time, the visual sensor on the top of the six-axis robot arm 404 captures images of the two docking slots 302 on the surface of the installation frame 301 and identifies the execution terminal type (such as drilling terminal, wiring terminal, etc.) corresponding to each docking slot 302. Then, if the six-axis robot arm 404 is currently installed with the first replacement execution terminal 407 (for drilling operations for fiber optic sensor implantation) and needs to be switched to the second replacement execution terminal 303 (for circuit connection), the six-axis robot arm 404 moves to the top of the corresponding left docking slot 302, so that the first self-locking magnetic connection end 405 at the top is aligned with the magnetic interface in the docking slot 302. Through electromagnetic control, the first self-locking magnetic connection end 405 and the docking fixing card 406 are desorbed, and the first self-locking magnetic connection end 405 and the first replacement execution end 407 connected to it are installed in the docking slot 302. After that, the six-axis robot arm 404 moves horizontally to the right docking slot 302 where the second replacement execution end 303 is located, so that the second self-locking magnetic connection end 304 is aligned with the magnetic interface at the top of the robot arm, and the second replacement execution end 303 is quickly connected through electromagnetic adsorption force.The six-axis robotic arm 404 drives the second replacement execution terminal 303 to lift slightly to verify the firmness of the connection (such as detecting the connection force through a torque sensor) to ensure that there is no looseness during the switching process. After completing the end switching, the six-axis robotic arm 404 scans the circuit breaker's terminal again through the visual sensor to generate three-dimensional coordinate data, so that the six-axis robotic arm 404 drives the fixture of the second replacement execution terminal 303 to adjust its posture (such as rotation, tilt) according to the preset wiring procedure, so that the test cable connector is accurately aligned with the terminal hole. Then, the six-axis robotic arm 404 applies a preset axial thrust to insert the cable connector into the terminal and trigger the internal torque wrench to complete the tightening according to the standard torque. During this process, the built-in pressure sensor monitors the contact force in real time to avoid deformation of the terminal due to over-tightening or poor contact due to over-loosening. After the circuit connection is completed, if the end needs to be switched again (such as switching from wiring mode to drilling mode), the six-axis robotic arm 404 repeats the above steps. The second replacement execution terminal 303 is returned to the original docking slot 302, and the required other terminals are grabbed. The time, type and operating parameters of each terminal replacement are automatically recorded through the external control system as a whole to form a maintenance log, which is convenient for tracing the frequency of terminal use and loss. The installation frame 301 can integrate execution terminals with different functions (such as drilling parts 422, wiring fixtures, thermal imaging probes, etc.), which are aligned with the magnetic connection ends through a unified docking slot 302, and the docking slot 302 and their respective execution terminals adopt a keyway and boss matching structure to ensure that only the corresponding type of terminal can be correctly inserted (such as the docking fixing card 406 of the drilling terminal is round, and the wiring terminal is square). The six-axis robot 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 card 406, without the need for manual intervention, thereby improving the switching efficiency of the test process.

[0047] In some embodiments, according to Figure 1 、 Figure 2 and Figure 7 As shown, a clamping assembly 500 is installed inside the experimental chamber 100. The clamping assembly 500 includes a connecting frame 501. A servo motor 502 is installed at the side end of the connecting frame 501. The output end of the servo motor 502 is connected to a pulley structure 503.

[0048] A first electromagnetic blocker 508 is installed outside the output end of the servo motor 502, and an outer rotating frame 504 is installed at the other end of the first electromagnetic blocker 508. The other end of the pulley structure 503 is connected to the bevel gear structure 505, and the other end of the bevel gear structure 505 is connected to the second electromagnetic blocker 507. The second electromagnetic blocker 507 is connected to the inner rotating frame 506. The inner rotating frame 506 is coaxially mounted inside the outer rotating frame 504, and a flexible clamper 509 is symmetrically installed on the inner wall surface of the inner rotating frame 506.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The wiring diagram of the second electromagnetic blocker 507, the first electromagnetic blocker 508, the optical fiber sensor, the external distributed optical fiber temperature measurement data collector, the micro ultrasonic generator, the visual sensor, the pressure sensor and the pressure sensor in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the second electromagnetic blocker 507, the first electromagnetic blocker 508, the optical fiber sensor, the external distributed optical fiber temperature measurement data collector, the micro ultrasonic generator, the visual sensor, the pressure sensor and the pressure sensor are no longer explained in detail.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The temperature rise test device for circuit breakers with polymer composite insulation is characterized by: include: Experimental chamber (100); A test adjustment component (400) installed inside the experimental chamber (100); The test adjustment component (400) comprises an automatic connection structure and a distributed temperature measurement structure, wherein 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 comprises a six-axis robotic arm (404) and a positioning visual sensor, wherein the six-axis robotic arm (404) is used to connect different execution terminals according to different operations, and the positioning visual sensor is used to identify the position of the circuit breaker interface to achieve accurate 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 guide cavity (410), wherein the guide cavity (410) is used to control the delivery of the optical fiber sensor according to the distribution rate, a minimally invasive drilling head (412) is installed outside the guide cavity (410), and the external distributed optical fiber temperature measurement data collector is used to collect temperature data of the optical fiber sensor; A fluid guiding chamber (415) is provided inside the minimally invasive drilling head (412), and a side end of the fluid guiding chamber (415) is connected to an injection running pipe (416). The injection running pipe (416) is located inside the end of the minimally invasive drilling head (412). An injection core end (417) and a debris suction core end (421) are respectively provided on the outer wall surface of the bottom of the minimally invasive drilling head (412), and the injection running pipe (416) and the injection core end (417) are connected. The top of the fluid guiding chamber (415) is connected to a fluid guiding pipe (408), an opening and closing electromagnetic valve body (409) is installed on the outside of the fluid guiding pipe (408), a micro high-pressure fluid pump (423) is installed on the side end of the fluid guiding 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 clamp (406) is installed on the top side end of the first replacement execution end (407), a drilling member (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), and the side end of the first self-locking magnetic connection end (405) is movably connected to the six-axis robot arm (404).

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

3. The temperature rise test device for a circuit breaker with polymer composite insulation according to claim 1, characterized in that: The top end of the chip suction core end (421) is connected to a traveling chip suction tube (420), and the traveling chip suction tube (420) is located inside the end of the minimally invasive drilling head (412).

4. The temperature rise test device for a circuit breaker with polymer composite insulation according to claim 1, characterized in that: A replacement assembly (300) is installed on the inner rear side wall of the experimental chamber (100), and the replacement assembly (300) includes a mounting frame (301). The surface of the mounting frame (301) is provided with at least two groups of docking grooves (302), one of which is connected to a second replacement execution terminal (303).

5. The temperature rise test device for a circuit breaker with polymer composite insulation according to claim 1, characterized in that: The top end 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).

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

7. The temperature rise test device for a circuit breaker with polymer composite insulation according to claim 6, characterized in that: A first electromagnetic blocker (508) is installed on the outside of the output end of the servo motor (502), an outer rotating frame (504) is installed on the side end of the first electromagnetic blocker (508), the servo motor (502) is transmission-connected to a bevel gear structure (505), a second electromagnetic blocker (507) is connected to the side end of the bevel gear structure (505), the second electromagnetic blocker (507) is connected to an inner rotating frame (506), and the flexible clamper (509) is symmetrically installed on the inner wall of the inner rotating frame (506).

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

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