An adaptive coupling circuit breaker detection device

Abstract

The application relates to the technical field of circuit breaker detection, and discloses a self-adaptive coupling circuit breaker detection device which comprises a detection platform and a clamping structure fixedly installed on the detection platform, a circuit breaker is arranged on the clamping structure, the clamping structure comprises clamping plates and a fixed plate, the fixed plate is fixedly installed on the detection platform, clamping plates are fixedly connected to the upper and lower ends of the fixed plate, top pressing blocks are fixedly connected to the upper and lower ends of the front end face of the fixed plate, the front end face of the circuit breaker abuts against the top pressing blocks, the upper and lower end faces of the circuit breaker are pressed against the clamping plates, a connecting module connected with a power supply is further slidably connected to the detection platform, and the connecting module is in contact with the incoming line end contact of the circuit breaker; the self-adaptive coupling circuit breaker detection device can guarantee the position stability of the measured circuit breaker in high-voltage test, avoid structural deformation caused by excessive clamping, and significantly improve the compatibility and clamping stability of the detection device for different types of circuit breakers.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker testing technology, specifically to an adaptive coupling circuit breaker testing device. Background Technology

[0002] With the continuous improvement of smart grids and the automation level of power systems, power networks are gradually evolving towards intelligence, digitalization, and high reliability. In this process, circuit breakers, as core components of power system protection, undertake crucial functions such as rapid fault isolation, overload current interruption, and circuit status monitoring. Their performance directly affects the stability of grid operation and equipment safety. Especially with the large-scale grid connection of new energy sources and the widespread integration of distributed power sources, power system load fluctuations are intensifying, and instantaneous faults are frequent, placing more stringent demands on the operating response speed and delay characteristics of circuit breakers. Traditional circuit breakers rely on mechanical bimetallic strips or electromagnetic tripping mechanisms to achieve overload and short-circuit protection. While their delay characteristics can protect equipment from instantaneous impacts to a certain extent, deviations in the operating time can easily lead to maloperation or failure to operate, thereby causing equipment damage or even regional power outages. Therefore, delay testing is necessary for the circuit breakers produced.

[0003] However, traditional testing equipment is usually manually constructed and can only be adapted to some circuit breakers. Moreover, it suffers from abnormal contact resistance and arc discharge problems due to unstable contact interfaces. Since the test platform and the circuit breaker's incoming contact use a rigid contact method, it is difficult to adapt to the curved surface characteristics of contacts of different shapes, resulting in insufficient effective contact area. In high-voltage and high-current tests, it is easy to cause local overheating, leading to contact surface welding and oxidation. At the same time, the manually constructed temporary test platform lacks an adaptive clamping mechanism, which cannot achieve multi-directional accurate positioning of the circuit breaker, affecting the repeatability of test parameters. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the existing technology, the present invention provides an adaptive coupling circuit breaker testing device, which has the advantages of reducing the electric arc generated between the testing device and the circuit breaker conductor and reducing the welding and oxidation of the contact surface, thus solving the problems of abnormal contact resistance and electric arc discharge of the testing device.

[0005] (II) Technical Solution: To achieve the above-mentioned purpose of reducing the electric arc generated between the testing equipment and the circuit breaker conductor and reducing the welding and oxidation of the contact surface, the present invention provides the following technical solution: an adaptive coupling circuit breaker testing equipment, including a testing platform and a clamping structure fixedly installed on it, wherein a circuit breaker is provided on the clamping structure, the clamping structure includes a clamping plate and a fixing plate, the fixing plate is fixedly installed on the testing platform, and the clamping plate is fixedly connected to both the upper and lower ends of the fixing plate, and a tightening block is fixedly connected to both the upper and lower ends of the front end face of the fixing plate, the front end face of the circuit breaker abuts against the tightening block, and the upper and lower end faces of the circuit breaker press against the clamping plate.

[0006] The testing platform is also slidably connected to a power supply module, which is in contact with the incoming contact of the circuit breaker. The testing platform is also fixedly installed with a cylinder that controls the sliding of the connection module. The testing platform is also equipped with a calibration adjustment rod for adjusting the circuit breaker calibration screw. The calibration adjustment rod is also connected to the testing platform with a drive module that drives the calibration adjustment rod to rotate and move axially.

[0007] Preferably, the connection module includes an adaptive contact, a connecting rod, and a linkage plate. The connecting rod is slidably connected to the detection platform. An adaptive contact is fixedly installed at one end of the connecting rod, and a linkage plate is fixedly installed at the other end of the connecting rod. The linkage plate is fixedly connected to the drive end of the cylinder. The adaptive contact is in contact with the inlet contact. A battery cell is disposed inside the connecting rod. One end of the battery cell is connected to the adaptive contact, and the other end of the battery cell is connected to a power source.

[0008] Preferably, the connecting rod is provided in two sets, and the adaptive contacts on the two sets of connecting rods are respectively connected to the two sets of incoming terminal contacts of the circuit breaker.

[0009] Preferably, the drive module includes a piston structure and a drive motor. The drive motor is fixedly connected to the detection platform through a fixed structure, and the piston structure is disposed between the drive motor and the calibration adjustment rod.

[0010] Preferably, the adaptive contact includes a pressure plate connected to the input terminal contact and an elastic contact module connected to the battery cell. The pressure plate and the elastic contact module are slidably connected to form an axially relative sliding structure. An elastic telescopic rod is provided between the pressure plate and the elastic contact module. The elastic contact module is fixedly connected to the axial end of the connecting rod. When the pressure plate is pressed against the input terminal contact by an external force, the elastic contact module slides out from the pressure plate position along the axial direction of the connecting rod, and the two end faces of the elastic contact module expand radially, so that the expanded end faces of the elastic contact module form a conductive contact interface with the input terminal contact.

[0011] Preferably, the elastic contact module includes a connector, a contact head, and a support head. The support head is covered with an elastic conductive sheet with a U-shaped cross-section on its outer periphery, and an elastic support structure is provided between the conductive sheet and the support head. One end of the connector is fixedly connected to the support head, and the other end of the connector is fixedly connected to the connecting rod. The contact head is fixedly embedded in the connector head. One end of the contact head is connected to the battery cell, and the other end of the contact head is slidably connected to the elastic conductive sheet. When the pressure plate is pressed tightly against the inlet contact, the elastic support structure supports the conductive sheets on both sides, so that the outer side of the conductive sheet expands outward and abuts against the inlet contact to form a conductive contact surface.

[0012] Preferably, the connector is slidably connected to the telescopic rod; a limiting ring is also provided on the rear end face of the pressure plate to limit the sliding distance of the elastic contact module.

[0013] Preferably, the elastic support structure includes a magnetic sheet and an electromagnet module. The electromagnet module is fixedly mounted on the surface of the support head. The magnetic sheet is made of soft magnetic material and is attached to the inner surface of the conductive sheet. The support head is composed of an inner sliding plate and an outer sliding plate that are nested and slidably connected. An elastic reset structure is provided between the inner and outer sliding plates. The inner sliding plate is fixedly connected to the connector head. Both the outer and inner sliding plates have arc-shaped support structures on their outer end faces. The arc-shaped support structure on the inner sliding plate has a snap-fit ​​structure, which is fixedly connected to the magnetic sheet and the conductive sheet. When the electromagnet module is energized, it generates a constant magnetic field with the same polarity as the magnetic sheet, driving the magnetic sheet to be repelled and causing the conductive sheet to expand radially outward, so that the conductive sheet abuts against the inlet contact. At the same time, the inner and outer sliding plates undergo axial contraction displacement. After power is cut off, the elastic reset structure resets the inner and outer sliding plates and restores the conductive sheet to its initial shape.

[0014] Preferably, the electromagnet module is fixedly installed on both sides of the outer sliding plate.

[0015] Preferably, two or more sets of telescopic rods are arranged in an equidistant array along the circumference of the pressure plate.

[0016] (III) Beneficial Effects: Compared with the prior art, the present invention provides an adaptive coupling circuit breaker testing device with the following beneficial effects: 1. The adaptive coupling circuit breaker testing device, through the combined use of the testing platform structure and the fixed plate structure, constructs a three-dimensional fixed structure with axial clamping and multi-directional limiting. Combined with the thread insertion depth adjustment function of the calibration adjustment rod, it not only ensures the positional stability of the circuit breaker under test during testing, but also avoids structural deformation caused by excessive clamping, significantly improving the compatibility and clamping stability of the testing device for different types of circuit breakers.

[0017] 2. This adaptive coupling circuit breaker testing equipment, through the combined use of an adaptive contact structure and a connecting rod structure, allows the conductive sheet to undergo radial elastic deformation when testing is initiated. This adaptively conforms to the curved surface features of the different shapes of the incoming contacts of various circuit breakers, forming distributed multi-point contact. This significantly increases the effective conductive area and ensures stable conductivity of the contact interface during testing. It effectively solves the technical problem of contact surface oxidation and arc damage caused by different shapes of the incoming contacts in traditional testing. This greatly improves the accuracy of testing parameters, the service life of the equipment, and the safety of the equipment, enabling the testing equipment to be compatible with most circuit breakers, thereby reducing testing costs and increasing efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the adaptive coupling circuit breaker detection device in this invention.

[0019] Figure 2 This is a side view of the structure of the adaptive coupling circuit breaker detection device in this invention.

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the adaptive contact of the adaptive coupling circuit breaker detection device in this invention.

[0021] Figure 4 This is a side view of the adaptive contact structure of the adaptive coupling circuit breaker detection device in this invention.

[0022] Figure 5 For the present invention Figure 4 Sectional view along direction AA.

[0023] Figure 6 This is a schematic diagram of the structure in which the conductive sheet is connected to the inlet contact in this invention.

[0024] Figure 7 For the present invention Figure 5 Enlarged view of the partial structure of the adaptive contact in the middle B section.

[0025] Figure 8 For the present invention Figure 6 Enlarged view of the partial structure of the C-type conductive sheet connecting to the input terminal contact.

[0026] Figure 9 This is a three-dimensional structural diagram of the conductive sheet of the adaptive coupling circuit breaker detection device in this invention.

[0027] In the diagram: 1. Detection platform; 2. Clamping plate; 3. Fixing plate; 4. Tightening block; 5. Circuit breaker; 51. Incoming line contact; 6. Adaptive contact; 61. Pressure plate; 611. Telescopic rod; 612. Limiting ring; 62. Elastic contact module; 621. Inner sliding plate; 622. Outer sliding plate; 623. Electromagnet module; 624. Magnetic sheet; 625. Snap-fit ​​structure; 626. Elastic reset structure; 627. Conductive sheet; 628. Connector; 629. Connector head; 63. Connecting rod; 64. Battery cell; 65. Linkage plate; 7. Calibration adjustment rod; 8. Piston structure; 9. Drive motor; 10. Cylinder. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-3An adaptive coupling circuit breaker testing device includes a testing platform 1 and a clamping structure fixedly installed on it. A circuit breaker 5 is mounted on the clamping structure, which includes clamping plates 2 and fixing plates 3. The fixing plate 3 is fixedly installed on the testing platform 1, and clamping plates 2 are fixedly connected to both the upper and lower ends of the fixing plate 3. Tightening blocks 4 are fixedly connected to both the upper and lower ends of the front face of the fixing plate 3. The front face of the circuit breaker 5 abuts against the tightening blocks 4, and the upper and lower ends of the circuit breaker 5 press against the clamping plates 2. Through the vertical pressing of the clamping plates 2 against the upper and lower ends of the circuit breaker 5 and the axial abutment of the tightening blocks 4 against the front face of the circuit breaker 5, a multi-directional three-dimensional constraint clamping structure is formed. Utilizing the synergistic effect of the clamping plates 2 and the tightening blocks 4, the circuit breaker 5 simultaneously bears the vertical clamping force and the axial positioning reaction force during the testing process. This avoids the localized stress concentration caused by traditional unidirectional clamping and achieves uniform distribution of clamping force through the dispersed force distribution of the multi-directional contact surfaces. This design effectively balances clamping stability and structural protection requirements, ensuring the circuit breaker 5 is fixed in position while preventing housing deformation due to excessive clamping, thus adapting to the rigid fixing requirements of circuit breakers 5 of different sizes and specifications. A power supply connection module is also slidably connected to the testing platform 1, contacting the inlet contact 51 of the circuit breaker 5. A cylinder 10 is also fixedly installed on the testing platform 1 to control the sliding of the connection module. When the cylinder 10 pushes the connection module against the contact, the sliding connection structure allows the connection module to perform slight self-correction based on the contact position deviation, ensuring a tight fit of the conductive interface. This effectively solves the problem of poor contact caused by position deviation in traditional rigid contact methods. A calibration adjustment rod 7 for adjusting the calibration screw of the circuit breaker 5 is also installed on the testing platform 1. A drive module for driving the rotation and axial lifting of the calibration adjustment rod 7 is connected between the calibration adjustment rod 7 and the testing platform 1. The calibration adjustment rod 7 is based on the thread characteristics and adjustment accuracy requirements of the circuit breaker 5 calibration screw. The drive module integrates rotary and linear motion functions, enabling the calibration adjustment rod 7 to precisely control the insertion depth through axial lifting and lowering, and to match the thread direction of the calibration screw through rotational motion. When the threaded end of the calibration adjustment rod 7 aligns with the calibration screw of the circuit breaker 5, the combined motion mode of the drive module can simultaneously complete thread engagement and pressure adjustment, achieving fine-tuning of calibration parameters. The calibration adjustment rod 7 replaces manual adjustment, improving the repeatability and efficiency of calibration operations through a mechanical transmission system, thereby ensuring the consistency of test parameters for different batches of circuit breakers 5.

[0030] Please see Figures 3-6The connecting module includes an adaptive contact 6, a connecting rod 63, and a linkage plate 65. The connecting rod 63 is slidably connected to the detection platform 1. The adaptive contact 6 is fixedly installed at one end of the connecting rod 63, and the linkage plate 65 is fixedly installed at the other end. The sliding connection between the connecting rod 63 and the detection platform 1 is designed to allow the connecting rod 63 to move axially along the detection platform 1 under the drive of the cylinder 10, thereby driving the adaptive contact 6 to accurately contact or separate from the incoming contact 51 of the circuit breaker 5. The adaptive contact 6 at one end of the connecting rod 63 ensures that the contact maintains the alignment accuracy with the incoming contact 51 of the circuit breaker 5 during movement. The other end is fixedly connected to the driving end of the cylinder 10 through the linkage plate 65, which can efficiently transmit the linear driving force of the cylinder 10 to the connecting rod 63, forming a stable power transmission path. This structural design allows the adaptive contact 6 to adaptively adjust the contact angle and pressure during contact, effectively compensating for the impact of the circuit breaker 5 installation position deviation on the contact interface. The linkage plate 65 is fixedly connected to the drive end of the cylinder 10, and the adaptive contact 6 is in contact with the input contact 51. This fixed connection design allows the linear driving force output by the cylinder 10 to be directly transmitted to the linkage plate 65, which then pushes the adaptive contact 6 to move axially via the connecting rod 63. This rigid connection ensures efficient transmission of driving force and precise motion trajectory, avoiding the transmission gap and energy loss problems inherent in traditional flexible connections. The contact design between the adaptive contact 6 and the input contact 51, through the synergy of mechanical drive and electrical connection, forms a stable physical contact interface under the thrust of the cylinder 10. Simultaneously, the deformation of the elastic conductive structure compensates for differences in the contact surface morphology, ensuring the stability of contact resistance during high-current testing and preventing arc discharge caused by poor contact. A battery cell 64 is installed inside the connecting rod 63. One end of the battery cell 64 is connected to the adaptive contact 6, and the other end is connected to a power source. One end of the battery cell 64 is connected to the adaptive contact 6, allowing the test current to be directly introduced into the contact interface. The other end is connected to an external power supply to form a complete circuit. This built-in conductive channel design effectively avoids the risks of tangling and wear of external wires during mechanical movement, while shortening the current transmission path and reducing the impact of line impedance on test accuracy. The integrated wiring solution also improves the overall compactness and electromagnetic compatibility of the equipment, ensuring that signal distortion is not caused by line interference during high-voltage testing.

[0031] Please see Figures 4-8The adaptive contact 6 includes a pressure plate 61 connected to the incoming contact 51 and an elastic contact module 62 connected to the battery cell 64. The pressure plate 61 and the elastic contact module 62 are slidably connected to form an axially relative sliding structure. The axially relative sliding connection structure of the pressure plate 61 and the elastic contact module 62 is designed to compensate for the installation deviation of the contact position through relative displacement when the adaptive contact 6 contacts the incoming contact 51 of the circuit breaker 5. After the cylinder 10 pushes the connecting rod 63 to make the pressure plate 61 initially contact the contact surface, the sliding fit between the pressure plate 61 and the elastic contact module 62 allows the elastic contact module 62 to continue sliding axially. This design allows the contact interface to maintain axial positioning accuracy while dynamically adjusting the contact angle according to the actual position of the incoming contact 51, ensuring the adaptive fit between the conductive component and the contact surface. An elastic telescopic rod 611 is provided between the pressure plate 61 and the elastic contact module 62. The elastic contact module 62 is fixedly connected to the axial end of the connecting rod 63. The purpose of providing the elastic telescopic rod 611 between the pressure plate 61 and the elastic contact module 62 is to provide controllable elastic support for the axial sliding of the contact module. When the pressure plate 61 is pressed against the contact by the thrust of the cylinder 10, the elastic deformation of the telescopic rod 611 can buffer the initial contact impact and avoid damage to the contact surface caused by rigid collision. At the same time, the elastic restoring force of the telescopic rod 611 can maintain a constant contact pressure between the pressure plate 61 and the contact, continuously compensating for changes in the contact gap caused by vibration or thermal expansion during the test, and ensuring the pressure stability of the conductive interface. When the pressure plate 61 is pressed against the inlet contact 51 by an external force, the elastic contact module 62 slides out of the pressure plate 61 along the axial direction of the connecting rod 63, and the two end faces of the elastic contact module 62 expand radially, so that the expanded end faces of the elastic contact module 62 form a conductive contact interface with the inlet contact 51.

[0032] Please see Figures 4-9 The elastic contact module 62 includes a connector 629, a contact head 628, and a support head. The support head is surrounded by an elastic conductive sheet 627 with a U-shaped cross-section. The conductive sheet 627 is made of beryllium copper alloy or silver-plated phosphor bronze. The U-shaped conductive sheet 627 surrounding the support head utilizes the deformation characteristics of the U-shaped structure to achieve adaptive bonding of the conductive interface. Under radial pressure, the U-shaped cross-section can extend and deform along the axial direction. The free edge at its open end can elastically bend according to the curvature of the surface of the inlet contact 51, allowing the outer surface of the conductive sheet 627 to adaptively wrap around the uneven surface of the inlet contact 51. This design converts axial sliding motion into radial expansion displacement through the geometric characteristics of the U-shaped structure, creating a continuously distributed curved surface contact between the conductive sheet 627 and the contact, effectively increasing the conductive contact area and avoiding oxide layer damage caused by localized stress concentration. Figure 5 and Figure 9As shown, an elastic support structure is provided between the conductive sheet 627 and the support head. This elastic support structure provides controllable deformation support force during the expansion of the conductive sheet 627. Through the synergistic effect of the built-in magnetic repulsion force and mechanical reset component, the elastic support structure forms a gradient distribution of support stiffness as the conductive sheet 627 expands outward. This not only restrains structural damage caused by excessive deformation of the conductive sheet 627 but also ensures uniform contact pressure between it and the contact surface. This structure dynamically adjusts the elastic restoring force of the conductive sheet 627 and the external contact reaction force to balance the support stiffness, ensuring a stable contact state at the conductive interface during high-voltage and high-current testing. One end of the connector 629 is fixedly connected to the support head, and the other end is fixedly connected to the connecting rod 63. The contact head 628 is fixedly embedded in the connector 629, with one end connected to the battery cell 64 and the other end slidably connected to the elastic conductive sheet 627. This allows the support head to uniformly transfer the load to the connecting rod 63 through the connector 629 when subjected to axial thrust, avoiding structural deformation caused by stress concentration and ensuring precise linkage between the outward expansion movement and axial displacement of the conductive sheet 627. The arrangement of the connector 628 being embedded inside the connector 629 and slidingly connected to the conductive piece 627 enables low-impedance conduction of the current in the battery cell 64. The sliding contact interface allows the conductive piece 627 to slide freely along the surface of the connector 628 during expansion, maintaining the continuity of the electrical connection and avoiding interference from wire entanglement on mechanical movement. When the pressure plate 61 is pressed tightly against the inlet contact 51, the elastic support structure supports the conductive pieces 627 on both sides, causing the outer surfaces of the conductive pieces 627 to expand outward and abut against the inlet contact 51 to form a conductive contact surface. Figure 6 and Figure 8 As shown, through the synergistic effect of electromagnetic force and mechanical elastic force, a multi-level pressure distribution is formed at the contact interface, which not only ensures the establishment of a highly conductive contact surface, but also adaptively compensates for the processing errors and assembly deviations of the contact surface, fundamentally eliminating abnormal fluctuations in contact resistance.

[0033] Please see Figures 4-9The elastic support structure includes a magnetic sheet 624 and an electromagnet module 623. The electromagnet module 623 is fixedly mounted on the surface of the support head. The magnetic sheet 624 is made of soft magnetic material, specifically a nanocrystalline permalloy FeNiMo thin strip. The magnetic sheet 624 is attached to the inner surface of the conductive sheet 627. The soft magnetic material can quickly respond to changes in the magnetic field generated by the electromagnet. When the electromagnet is energized, the magnetic sheet 624 is subjected to the repulsive force of the same polarity magnetic field, causing the conductive sheet 627 to undergo radial expansion deformation, thereby closely conforming to the curved contour of the incoming contact 51 of the circuit breaker 5, achieving a conductive contact interface. The support head features a large-area adaptive fit; it consists of a nested sliding inner slide plate 621 and an outer slide plate 622, with an elastic reset structure 626 between them. The inner slide plate 621 is fixedly connected to the connector 629. Both the outer slide plate 622 and the outer slide plate 621 have arc-shaped support structures on their outer end faces. The support head uses a nested sliding inner slide plate 621 and outer slide plate 622 structure, with an elastic reset structure 626 between them, allowing the inner slide plate 621 and outer slide plate 622 to slide relative to each other axially under electromagnetic force. The fixed connection between the inner slide plate 621 and the connector 629 ensures the stability of power transmission, while the arc-shaped support structures on the outer sides of the outer slide plate 622 and inner slide plate 621 provide uniform mechanical support for the radial expansion of the conductive sheet 627. Furthermore, the arc-shaped support structure on the inner slide plate 621 is provided with a snap-fit ​​structure 625, which is fixedly connected to the magnetic sheet 624 and the conductive sheet 627. The snap-fit ​​structure 625 directly links the displacement of the magnetic sheet 624 and the deformation of the conductive sheet 627 through mechanical locking. When the electromagnet module 623 is energized, it generates a constant magnetic field with the same polarity as the magnetic sheet 624, which drives the magnetic sheet 624 to be repulsed and causes the conductive sheet 627 to expand radially outward, so that the conductive sheet 627 abuts against the inlet contact 51. At the same time, the inner slide plate 621 and the outer slide plate 622 generate axial contraction displacement. During this process, the inner slide plate 621 and the outer slide plate 622 generate axial contraction displacement under the pulling force of the outward expansion of the conductive sheet 627, which provides the necessary space compensation for the radial deformation of the conductive sheet 627. The coupling effect of axial contraction displacement and radial expansion motion allows the conductive sheet 627 to fully wrap the surface of the inlet contact 51, forming a uniformly distributed contact pressure. This increases the conductive area while avoiding material damage caused by local overload. After power is cut off, the elastic reset structure 626 resets the inner and outer sliding plates 621 and restores the conductive sheet 627 to its initial shape. This design achieves automatic reset of the structure based on the deformation recovery characteristics of elastic materials. After the electromagnetic force disappears, the elastic reset structure 626 releases the stored elastic potential energy, driving the inner and outer sliding plates 621 and 622 to slide and reset in the opposite direction, and pulling the conductive sheet 627 to its initial position.

[0034] Please see Figures 2-9Electromagnetic modules 623 are fixedly installed on both sides of the outer slide plate 622, so that the magnetic field generated by the electromagnet can act evenly on the magnetic plates 624 on both sides. This ensures that the conductive plate 627 is subjected to symmetrical force on both sides during radial expansion, avoiding the skewness of the conductive plate 627 or insufficient local contact pressure caused by uneven magnetic force on one side. This ensures the uniformity and stability of the contact interface between the conductive plate 627 and the inlet contact 51. Two or more sets of telescopic rods 611 are arranged equidistantly along the circumference of the pressure plate 61. The equidistantly distributed telescopic rods 611 can evenly distribute the axial pressure transmitted by the pressure plate 61, preventing the elastic contact module 62 from deflecting or jamming due to local stress concentration. The synergistic effect of multiple sets of telescopic rods 611 not only improves the guiding accuracy of the relative sliding between the pressure plate 61 and the elastic contact module 62, but also enhances the adaptability of the contact pressure through the superposition effect of elastic deformation. This ensures that the pressure plate 61 can maintain stable axial alignment when contacting inlet contacts 51 of different shapes, while providing balanced mechanical support for the radial expansion of the elastic contact module 62. The connector 629 and the telescopic rod 611 are slidably connected. This slidable connection allows the elastic contact module 62 to dynamically adjust during axial movement, enabling it to slide freely axially when subjected to the reaction force of the incoming contact 51, thus adaptively compensating for contact position deviations. This flexible connection method ensures the freedom of movement of the conductive sheet 627 while reducing mechanical resistance through the low friction characteristics of the sliding surface. A limiting ring 612 is also provided on the rear end face of the pressure plate 61 to limit the sliding distance of the elastic contact module 62. Two sets of connecting rods 63 are provided, and the adaptive contacts 6 on the two sets of connecting rods 63 are respectively connected to the two sets of incoming contacts 51 of the circuit breaker 5. The independent driving mechanism of the two sets of connecting rods 63 allows the two adaptive contacts 6 to independently adjust their contact posture according to their respective contact positions, solving the problem of asynchronous contact caused by the difference in the positions of the two contacts during detection. The drive module includes a piston structure 8 and a drive motor 9. The drive motor 9 is fixedly connected to the detection platform 1 via a fixed structure. The drive motor 9 drives the calibration adjustment rod 7 to rotate around its axis through rotational motion, achieving thread engagement adjustment with the calibration screw. The piston structure 8 is positioned between the drive motor 9 and the calibration adjustment rod 7. The piston structure 8 drives the calibration adjustment rod 7 to move axially up and down through linear motion, precisely controlling the depth to which it is inserted into the calibration screw of the circuit breaker 5. The synergistic action of the piston and motor enables the calibration adjustment rod 7 to complete a continuous action of thread alignment, pressure application, and rotational adjustment, replacing manual operation and improving calibration accuracy. Simultaneously, the fixed structure ensures the stability of the drive assembly during operation, avoiding the impact of vibration interference on calibration accuracy.

[0035] Working Principle: During operation, the circuit breaker 5 under test is first installed on the testing platform 1, with its lateral contact surface tightly fitted to the fixing plate 3. The spacing adjustment mechanism of the upper and lower clamping plates 2 achieves vertical clamping of the circuit breaker 5 body. At the same time, the front end face of the circuit breaker 5 is subjected to axial constraint force by the top clamping block 4, forming a multi-directional limiting clamping system. Subsequently, the calibration adjustment rod 7 is inserted into the calibration threaded hole at the bottom of the circuit breaker 5 through the axial lifting and rotation of the drive module. This adjustment rod serves as both the execution mechanism for bimetallic strip parameter calibration and, through its insertion depth, strengthens the overall connection rigidity between the circuit breaker 5 and the clamping structure. During the test start-up phase, the cylinder 10 drives the linkage plate 65 to move the connecting rod 63 axially, so that the adaptive contact 6 and the inlet contact 51 of the circuit breaker 5 achieve contact coupling. At this time, the power supply system applies a test current to the circuit breaker 5 through the circuit channel formed by the battery cell 64 and the conductive contact interface, accurately simulating the load state under actual working conditions. During testing, the drive module can synchronously control the calibration adjustment rod 7 to rotate and fine-tune, realizing dynamic calibration of the protection parameters of the circuit breaker 5 and continuous detection of its delay characteristics. After the test is completed, the electromagnet module 623 is de-energized, and the elastic reset structure 626 causes the conductive sheet 627 to automatically return to its initial state. Each actuator resets and waits for the next testing cycle.

[0036] After clamping, cylinder 10 drives linkage plate 65 to advance connecting rod 63 axially, causing pressure plate 61 of adaptive contact 6 to make initial contact with incoming contact 51 of circuit breaker 5. As cylinder 10 continues to apply thrust, pressure plate 61 and elastic contact module 62 produce relative sliding displacement, and elastic contact module 62 gradually enters a free adjustment state. Subsequently, electromagnet module 623 is energized to generate a directional constant magnetic field, which drives magnetic sheet 624 to drive conductive sheet 627 to expand radially outward through the repulsive force of like magnetic poles. Nested inner slide plate 621 and outer slide plate 622 produce axial contraction displacement under the action of outward expansion tension of magnetic sheet 624 and conductive sheet 627, providing extra length for the deformation of conductive sheet 627, so that the outer side of U-shaped conductive sheet 627 and the curved surface of incoming contact 51 form a distributed contact interface, realizing a stable conductive connection with a large contact area, such as Figure 6 and 8As shown. After the test is completed, the electromagnet module 623 is first de-energized to eliminate the magnetic field effect. The elastic reset structure 626 drives the inner slide plate 621 and the outer slide plate 622 to reset, causing the conductive sheet 627 to return to its initial convergent shape. Subsequently, the cylinder 10 reverses its action to completely separate the adaptive contact 6 from the circuit breaker 5, completing the detection cycle. This contact method allows the conductive sheet 627 to effectively cover the curvature change area of ​​the incoming terminal contact 51, greatly increasing the effective conductive area. When the contact interface area increases, the current distribution density per unit area decreases, effectively avoiding the phase transition critical temperature of the metal material and fundamentally suppressing the formation of fusion welding. Furthermore, since the contact resistance is inversely proportional to the square root of the effective contact area, the increased contact area greatly reduces the total contact resistance, significantly reducing the amount of Joule heat generated, thereby preventing the formation of an oxide layer on the contact surface. At the same time, the parallel conductive network formed by multi-point contact can avoid the resistance mutation caused by the failure of micro-contact points, maintain a stable conductive path, and avoid arc discharge caused by instantaneous resistance surges. Furthermore, after power failure, the adaptive contact 6 achieves rapid physical separation from the electromagnetic module through the elastic reset structure 626, effectively improving the separation speed between the conductive sheet 627 and the input contact 51. This ensures that the electrode gap reaches the safety threshold before the minimum breakdown distance required for arc formation is established, thus preventing arc generation. Simultaneously, the balanced current distribution effectively reduces contact resistance fluctuations, ensuring the stability of current parameters during testing and providing reliable electrical contact protection for the accurate detection of the circuit breaker 5's protection characteristics.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive coupling circuit breaker testing device, comprising a testing platform (1) and a clamping structure fixedly installed thereon, wherein a circuit breaker (5) is disposed on the clamping structure, the clamping structure comprising a clamping plate (2) and a fixing plate (3), the fixing plate (3) being fixedly installed on the testing platform (1), characterized in that: The clamping plate (2) is fixedly connected to both the upper and lower ends of the fixing plate (3), and the upper and lower ends of the front face of the fixing plate (3) are fixedly connected to the clamping block (4). The front face of the circuit breaker (5) abuts against the clamping block (4), and the upper and lower ends of the circuit breaker (5) press against the clamping plate (2). The testing platform (1) is also slidably connected to a power supply connection module, which is in contact with the inlet contact (51) of the circuit breaker (5). The testing platform (1) is also fixedly installed with a cylinder (10) for controlling the sliding of the connection module. The testing platform (1) is also installed with a calibration adjustment rod (7) for adjusting the calibration screw of the circuit breaker (5). The calibration adjustment rod (7) and the testing platform (1) are also connected with a drive module for driving the calibration adjustment rod (7) to rotate and axially lift. The connection module includes an adaptive contact (6), a connecting rod (63), and a linkage plate (65). The connecting rod (63) is slidably connected to the detection platform (1). The adaptive contact (6) is fixedly installed at one end of the connecting rod (63), and the linkage plate (65) is fixedly installed at the other end of the connecting rod (63). The adaptive contact (6) is in contact with the inlet contact (51). A battery cell (64) is provided inside the connecting rod (63). One end of the battery cell (64) is connected to the adaptive contact (6), and the other end of the battery cell (64) is connected to a power source. The adaptive contact (6) includes a pressure plate (61) connected to the input terminal contact (51) and an elastic contact module (62) connected to the battery cell (64). The pressure plate (61) and the elastic contact module (62) are slidably connected to form an axially relative sliding structure. An elastic telescopic rod (611) is provided between the pressure plate (61) and the elastic contact module (62). The elastic contact module (62) is fixedly connected to the axial end of the connecting rod (63). The elastic contact module (62) includes a connector (629), a contact head (628), and a support head. The support head is covered with an elastic conductive sheet (627) with a U-shaped cross-section on its outer periphery, and an elastic support structure is provided between the conductive sheet (627) and the support head. One end of the connector (629) is fixedly connected to the support head, and the other end of the connector (629) is fixedly connected to the connecting rod (63). The contact head (628) is fixedly embedded in the connector (629). One end of the contact head (628) is connected to the battery cell (64), and the other end of the contact head (628) is slidably connected to the elastic conductive sheet (627). The elastic support structure includes a magnetic sheet (624) and an electromagnet module (623). The electromagnet module (623) is fixedly installed on the surface of the support head. The magnetic sheet (624) is made of soft magnetic material and is attached to the inner surface of the conductive sheet (627). The support head is composed of a nested sliding inner slide plate (621) and an outer slide plate (622). An elastic reset structure (626) is provided between the inner slide plate (621) and the outer slide plate (622). The inner slide plate (621) is fixedly connected to the connector (629). The outer end faces of both the outer slide plate (622) and the inner slide plate (621) are provided with arc-shaped support structures. The arc-shaped support structure is provided with a snap-fit ​​structure (625). The snap-fit ​​structure (625) is fixedly connected to the magnetic sheet (624) and the conductive sheet (627). When the electromagnet module (623) is energized, it generates a constant magnetic field with the same polarity as the magnetic sheet (624), which drives the magnetic sheet (624) to be repulsed and causes the conductive sheet (627) to expand radially outward, so that the conductive sheet (627) abuts against the inlet contact (51). At the same time, the inner slide plate (621) and the outer slide plate (622) generate axial contraction displacement. After the power is cut off, the inner slide plate (621) and the outer slide plate (622) are reset by the elastic reset structure (626) and the conductive sheet (627) is restored to its initial shape.

2. The adaptive coupling circuit breaker detection device according to claim 1, characterized in that: The linkage plate (65) is fixedly connected to the drive end of the cylinder (10).

3. The adaptive coupling circuit breaker detection device according to claim 2, characterized in that: The connecting rod (63) is provided in two sets, and the adaptive contacts (6) on the two sets of connecting rods (63) are respectively connected to the two sets of incoming terminal contacts (51) of the circuit breaker (5).

4. The adaptive coupling circuit breaker detection device according to claim 1, characterized in that: The drive module includes a piston structure (8) and a drive motor (9). The drive motor (9) is fixedly connected to the detection platform (1), and the piston structure (8) is disposed between the drive motor (9) and the calibration adjustment rod (7).

5. The adaptive coupling circuit breaker detection device according to claim 2, characterized in that: When the pressure plate (61) is pressed against the inlet contact (51) by an external force, the elastic contact module (62) slides out from the position of the pressure plate (61) along the axial direction of the connecting rod (63), and the two ends of the elastic contact module (62) expand radially, so that the expanded end face of the elastic contact module (62) forms a conductive contact interface with the inlet contact (51).

6. The adaptive coupling circuit breaker detection device according to claim 5, characterized in that: When the pressure plate (61) is pressed tightly against the inlet contact (51), the elastic support structure supports the conductive sheet (627) on both sides, so that the outer side of the conductive sheet (627) expands outward and abuts against the inlet contact (51) to form a conductive contact surface.

7. The adaptive coupling circuit breaker detection device according to claim 6, characterized in that: The connector (629) is slidably connected to the telescopic rod (611); a limiting ring (612) is also provided on the rear end face of the pressure plate (61) to limit the sliding distance of the elastic contact module (62).

8. The adaptive coupling circuit breaker detection device according to claim 1, characterized in that: The electromagnet module (623) is fixedly installed on both sides of the outer slide plate (622).

9. The adaptive coupling circuit breaker detection device according to claim 5, characterized in that: The telescopic rods (611) are arranged in two or more sets at equal intervals along the circumference of the pressure plate (61).

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