Self-adaptive coupling circuit breaker detection equipment

Abstract

The invention 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 a clamping plate and a fixing plate, the fixing plate is fixedly installed on the detection platform, and the clamping plate is fixedly installed on the detection platform. The upper end and the lower end of the fixing plate are fixedly connected with clamping plates, the upper end and the lower end of the front end face of the fixing plate are fixedly connected with jacking blocks, the front end face of the circuit breaker abuts against the jacking blocks, the upper end face and the lower end face of the circuit breaker are connected with the clamping plates in a pressing mode, and a connecting module communicated with a power source is further slidably connected to the detection platform and makes contact with a wire inlet end contact of the circuit breaker. According to the invention, the position stability of the tested circuit breaker in a high-voltage test is ensured, the structural deformation caused by excessive clamping is avoided, and the compatibility and clamping stability of the detection equipment for different types of circuit breakers are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker detection, and particularly to an adaptive coupling circuit breaker detection device. Background Art

[0002] With the continuous improvement of the degree of automation of smart grids and power systems, the power network is gradually evolving towards intelligence, digitization, and high reliability. In this process, as the core component of power system protection, the circuit breaker undertakes key functions such as rapid fault isolation, overload current interruption, and circuit state monitoring. Its performance is directly related to the stability of power grid operation and the safety of equipment. Especially in the context of large-scale integration of new energy and wide access of distributed power sources, the load fluctuation of the power system intensifies, and instantaneous faults occur frequently, posing more stringent requirements for the action response speed and delay characteristics of the circuit breaker. Traditional circuit breakers rely on mechanical bimetallic strips or electromagnetic tripping mechanisms to achieve overload and short-circuit protection. Although their delay characteristics can protect the equipment from instantaneous impacts within a certain range, if the action time deviates, it is easy to cause misoperation or refusal to operate of the protection, which may further lead to equipment damage or even regional power outages. Therefore, it is necessary to conduct delay detection on the produced circuit breakers.

[0003] However, traditional detection equipment is usually manually built, which can only adapt to some circuit breakers, and there are problems such as abnormal contact resistance and arc discharge caused by unstable contact interfaces. Since the test platform and the contact of the circuit breaker's incoming line terminal adopt a rigid contact method, it is difficult to adapt to the curved surface characteristics of different-shaped contacts, resulting in insufficient effective contact area. Local overheating is likely to occur during high-voltage and large-current tests, leading to contact surface welding and oxidation; at the same time, the manually built temporary detection platform lacks an adaptive clamping mechanism and cannot achieve multi-directional precise positioning of the circuit breaker, affecting the repeatability of test parameters. Summary of the Invention

[0004] (1) Technical problems to be solved: Aiming at the deficiencies of the prior art, the present invention provides an adaptive coupling circuit breaker detection device, which has the advantages of reducing the arc generated between the detection device and the circuit breaker conductor and reducing contact surface welding and oxidation, and solves the problems of abnormal contact resistance and arc discharge of the test equipment.

[0005] (2) Technical solution: To achieve the above object of reducing the arc generated between the detection device and the breaker conductor and reducing the welding and oxidation of the contact surface, the present invention provides the following technical solution: An adaptive coupling breaker detection device includes a detection platform and a clamping structure fixedly installed thereon. A breaker is provided on the clamping structure. The clamping structure includes clamping plates and a fixing plate. The fixing plate is fixedly installed on the detection platform, and the clamping plates are fixedly connected to both the upper and lower ends of the fixing plate. Tightening blocks are fixedly connected to both the upper and lower ends of the front end face of the fixing plate. The front end face of the breaker abuts against the tightening blocks, and the upper and lower end faces of the breaker are pressed against the clamping plates.

[0006] A connection module connected to the power supply is also slidably connected to the detection platform. The connection module is in contact with the incoming line end contact of the breaker. A cylinder for controlling the sliding of the connection module is fixedly installed on the detection platform. A calibration adjustment rod for adjusting the calibration screw of the breaker is also installed on the detection platform. A drive module for driving the calibration adjustment rod to rotate and axially lift is connected between the calibration adjustment rod and the detection platform.

[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. A linkage plate is fixedly installed at the other end of the connecting rod. The linkage plate is fixedly connected to the driving end of the cylinder. The adaptive contact is in contact with the incoming line end contact. A battery core is provided in the connecting rod. One end of the battery core is connected to the adaptive contact, and the other end of the battery core is connected to a power supply.

[0008] Preferably, two groups of connecting rods are provided, and the adaptive contacts on the two groups of connecting rods are respectively connected to the two groups of incoming line end contacts of the 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 fixing structure. The piston structure is provided between the drive motor and the calibration adjustment rod.

[0010] Preferably, the adaptive contact includes a pressing plate in contact with the incoming line end contact and an elastic contact module connected to the battery core. The pressing plate and the elastic contact module form an axially relative sliding structure through a sliding connection. An elastic telescopic rod is provided between the pressing plate and the elastic contact module. The elastic contact module is fixedly connected to the axial end of the connecting rod. When the pressing plate is externally forced to be tightened against the incoming line end contact, the elastic contact module generates a sliding displacement along the axial direction of the connecting rod and slides out from the position of the pressing plate, and the two end faces of the elastic contact module radially expand, so that the radially expanded end faces of the elastic contact module form a conductive contact interface with the incoming line end contact.

[0011] Preferably, the elastic contact module includes a connecting head, a power connection head, and a supporting head. The outer periphery of the supporting head is coated with an elastic conductive sheet having a U-shaped cross-section on the side, and an elastic support structure is provided between the conductive sheet and the supporting head; one end of the connecting head is fixedly connected to the supporting head, the other end of the connecting head is fixedly connected to the connecting rod, the power connection head is fixedly embedded in the connecting head, one end of the power connection head is connected to the battery cell, the other end of the power connection head is in sliding contact with the elastic conductive sheet. When the pressing plate is pressed against and adheres to the incoming line end contact, the elastic support structure supports the conductive sheets on both sides, so that the outer sides of the conductive sheets expand outward to abut against the incoming line end contact to form a conductive contact surface.

[0012] Preferably, the connecting head is in sliding connection with the telescopic rod; a limiting ring for limiting the sliding distance of the elastic contact module is further provided on the rear end surface of the pressing plate.

[0013] Preferably, the elastic support structure includes a magnetic sheet and an electromagnet module. The electromagnet module is fixedly installed on the surface of the supporting head. The magnetic sheet is made of a soft magnetic material and is attached to the inner surface of the conductive sheet; the supporting head is composed of an inner sliding plate and an outer sliding plate which are nested and slidably connected. An elastic reset structure is provided between the inner sliding plate and the outer sliding plate. The inner sliding plate is fixedly connected to the connecting head. Arc-shaped support structures are provided on the outer side end surfaces of the outer sliding plate and the inner sliding plate. A buckle structure is provided on the arc-shaped support structure on the inner sliding plate. The buckle structure is fixedly connected between the magnetic sheet and the conductive sheet. When the electromagnet module is energized, a constant magnetic field with the same polarity as the magnetic sheet is generated, driving the magnetic sheet to be repelled to drive the conductive sheet to expand radially outward, so that the conductive sheet abuts against the incoming line end contact. At the same time, the inner sliding plate and the outer sliding plate generate an axial contraction displacement; after power-off, the inner sliding plate and the outer sliding plate are reset by the elastic reset structure and the conductive sheet returns to its initial state.

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

[0015] Preferably, two or more groups of telescopic rods are arranged at equal intervals in the circumferential direction of the pressing plate.

[0016] (III) Beneficial effects: Compared with the prior art, the present invention provides an adaptive coupling circuit breaker detection device, which has the following beneficial effects: 1. The adaptive coupling circuit breaker detection device, through the combined use of the detection platform structure and the fixing plate structure, constructs a three-dimensional fixing structure of axial pressing and multi-directional limiting, and cooperates with the function of adjusting the threaded insertion depth of the calibration adjusting rod, which not only ensures the position stability of the circuit breaker under test during the test, but also avoids the structural deformation caused by excessive clamping, and significantly improves the compatibility and clamping stability of the detection device for circuit breakers of different models.

[0017] 2. The adaptive coupling circuit breaker detection device, through the combined use of the adaptive contact structure and the connecting rod structure, when the detection is started, the conductive sheet can generate radial elastic deformation, adaptively fit the curved surface characteristics of the incoming line end contacts of different circuit breakers with different shapes, form distributed multi-point contacts, greatly improve the effective conductive area, ensure the stable conductive performance of the contact interface during the test process, effectively solve the technical problems of contact surface oxidation and arc damage caused by different shapes of the incoming line end contacts of the circuit breaker in traditional detection, greatly improve the accuracy of detection parameters, the service life of the device and the safety of the device, enable the detection device to adapt to most circuit breakers, thereby reducing the detection cost and improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the adaptive coupling circuit breaker detection device in the present invention.

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

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

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

[0022] Figure 5 For the present invention Figure 4 Cross-sectional view taken along the line A-A.

[0023] Figure 6 It is a schematic diagram of the structure where the conductive sheet is connected to the incoming line end contact in the present invention.

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

[0025] Figure 8 For the present invention Figure 6 Enlarged view of the partial structure where the C conductive sheet structure is connected to the incoming line end contact in the present invention.

[0026] Figure 9 It is a three-dimensional structure schematic diagram of the conductive sheet of the adaptive coupling circuit breaker detection device in the present invention.

[0027] In the figure: 1, detection platform; 2, clamping plate; 3, fixing plate; 4, pressing block; 5, circuit breaker; 51, incoming line end contact; 6, adaptive contact; 61, pressing 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, buckle structure; 626, elastic reset structure; 627, conductive sheet; 628, power connection head; 629, connection head; 63, connecting rod; 64, battery cell; 65, linkage plate; 7, calibration adjustment rod; 8, piston structure; 9, drive motor; 10, air cylinder. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-3, An adaptive coupling circuit breaker detection device, including a detection platform 1 and a clamping structure fixedly installed thereon. A circuit breaker 5 is arranged on the clamping structure. The clamping structure includes clamping plates 2 and a fixing plate 3. The fixing plate 3 is fixedly installed on the detection 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 end face of the fixing plate 3. The front end face of the circuit breaker 5 abuts against the tightening blocks 4, and the upper and lower end faces of the circuit breaker 5 are pressed against the clamping plates 2. Through the vertical pressing of the clamping plates 2 on the upper and lower end faces of the circuit breaker 5 and the axial abutment of the tightening blocks 4 on the front end face of the circuit breaker 5, a clamping structure with multi-directional three-dimensional constraints is formed. By the synergistic effect of the clamping plates 2 and the tightening blocks 4, the circuit breaker 5 bears the clamping force in the vertical direction and the positioning reaction force in the axial direction during the detection process, which not only avoids the local stress concentration caused by traditional single-direction clamping but also realizes the uniform distribution of the clamping force through the dispersed force on the multi-directional contact surfaces. This design effectively balances the requirements of clamping stability and structural protection, while ensuring the fixed position of the circuit breaker 5, preventing the deformation of the housing caused by excessive clamping, and thus adapting to the rigid fixing requirements of circuit breakers 5 with different size specifications; A connection module connected to the power supply is also slidably connected to the detection platform 1. The connection module is in contact with the incoming line terminal contact 51 of the circuit breaker 5. A cylinder 10 for controlling the sliding of the connection module is also fixedly installed on the detection platform 1. When the cylinder 10 pushes the connection module to abut against the contact, the sliding connection structure allows the connection module to perform a micro self-correction according to the position deviation of the contact, ensuring the tight fit of the conductive interface. It effectively solves the problem of poor contact caused by position deviation in the traditional rigid contact method. A calibration adjustment rod 7 for adjusting the calibration screw of the circuit breaker 5 is also installed on the detection platform 1. A drive module for driving the calibration adjustment rod 7 to rotate and axially lift is also connected between the calibration adjustment rod 7 and the detection platform 1. The calibration adjustment rod 7 is based on the thread characteristics and adjustment accuracy requirements of the calibration screw of the circuit breaker 5. The drive module integrates the functions of rotation and linear motion, enabling the calibration adjustment rod 7 to not only accurately control the insertion depth through axial lifting but also match the thread rotation direction of the calibration screw through rotational motion. When the threaded end of the calibration adjustment rod 7 is docked with the calibration screw of the circuit breaker 5, the composite motion mode of the drive module can synchronously complete thread meshing and pressure adjustment, realizing the fine adjustment of calibration parameters. The calibration adjustment rod 7 replaces the manual adjustment method, improving the repeat accuracy and efficiency of the calibration operation through the mechanical transmission system, and thus ensuring the consistency of the detection parameters of circuit breakers 5 in different batches.

[0030] Please refer to Figures 3-6, 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. One end of the connecting rod 63 is fixedly installed with the adaptive contact 6, and the other end of the connecting rod 63 is fixedly installed with the linkage plate 65. The sliding connection design between the connecting rod 63 and the detection platform 1 is to enable the connecting rod 63 to perform an axial translation movement along the detection platform 1 under the drive of the cylinder 10, so as to drive the adaptive contact 6 to accurately contact or separate from the incoming line end contact 51 of the circuit breaker 5. Setting the adaptive contact 6 at one end of the connecting rod 63 can ensure the alignment accuracy between the contact and the incoming line end contact 51 of the circuit breaker 5 during the movement process. 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 enables the adaptive contact 6 to adaptively adjust the contact angle and pressure during the contact process, effectively compensating for the influence of the installation position deviation of the circuit breaker 5 on the contact interface. The linkage plate 65 is fixedly connected to the driving end of the cylinder 10, and the adaptive contact 6 is in contact with the incoming line end contact 51. The fixed connection design between the linkage plate 65 and the driving end of the cylinder 10 can directly transmit the linear driving force output by the cylinder 10 to the linkage plate 65, and then push the adaptive contact 6 to achieve axial movement through the connecting rod 63. This rigid connection method ensures the high efficiency of the driving force transmission and the accuracy of the movement trajectory, avoiding the problems of transmission clearance and energy loss existing in the traditional flexible connection. The contact design between the adaptive contact 6 and the incoming line end contact 51 forms a stable physical contact interface under the action of the thrust of the cylinder 10 through the coordinated action of mechanical drive and electrical connection. At the same time, the deformation of the elastic conductive structure compensates for the surface topography difference of the contact, ensuring the stability of the contact resistance during high-current testing and preventing the occurrence of arc discharge phenomena caused by poor contact. A battery core 64 is arranged inside the connecting rod 63. One end of the battery core 64 is connected to the adaptive contact 6, and the other end of the battery core 64 is connected to a power supply. Connecting one end of the battery core 64 to the adaptive contact 6 can directly introduce the test current into the contact interface of the contact, and connecting the other end to an external power supply forms a complete circuit. This built-in conductive channel design effectively avoids the risk of winding and abrasion of the external wire during the mechanical movement process. At the same time, it shortens the current transmission path and reduces the influence of the line impedance on the test accuracy. The integrated wiring scheme also improves the compactness and electromagnetic compatibility of the overall structure of the equipment, ensuring that there is no signal distortion caused by line interference during high-voltage testing.

[0031] Please refer to Figures 4-8, the adaptive contact 6 includes a pressure plate 61 connected to the incoming line terminal contact 51 and an elastic contact module 62 communicating with the battery cell 64. The pressure plate 61 and the elastic contact module 62 form an axially relative sliding structure through a sliding connection. The design of using the axially relative sliding connection structure between the pressure plate 61 and the elastic contact module 62 is to compensate for the installation deviation of the contact position through relative displacement when the adaptive contact 6 contacts the incoming line terminal contact 51 of the circuit breaker 5. When the air 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 to slide axially. This design enables the contact interface to dynamically adjust the contact angle according to the actual position of the incoming line terminal contact 51 while maintaining the axial positioning accuracy, ensuring the adaptive fitting of the conductive component and the contact surface of the contact. 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 setting the elastic telescopic rod 611 between the pressure plate 61 and the elastic contact module 62 is to provide a controllable elastic support for the axial sliding of the contact module. When the pressure plate 61 is pushed by the thrust of the air cylinder 10 to press against the contact, 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 the change in the contact gap caused by vibration or thermal expansion during the test process and ensuring the pressure stability of the conductive interface; when the pressure plate 61 is pressed against the incoming line terminal contact 51 by an external force, the elastic contact module 62 generates a sliding displacement along the axis of the connecting rod 63 and slides out from the position of the pressure plate 61, 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 incoming line terminal contact 51.

[0032] Please refer to Figures 4-9 , the elastic contact module 62 includes a connection head 629, a power connection head 628 and a support head. The outer periphery of the support head is covered with an elastic conductive sheet 627 with a U-shaped cross-section on the side. The conductive sheet 627 is made of beryllium copper alloy or silver-plated phosphor bronze. The outer periphery of the support head is covered with the elastic conductive sheet 627 with a U-shaped cross-section on the side to achieve the adaptive fitting of the conductive interface by using the deformation characteristics of the U-shaped structure. The U-shaped cross-section can be deformed along the axial direction when subjected to radial pressure, and the free edge of its open end can elastically bend with the change of the surface curvature of the incoming line terminal contact 51, so that the outer side of the conductive sheet 627 adaptively wraps the concave and convex surfaces of the incoming line terminal contact 51. This design converts the axial sliding motion into a radial expansion displacement through the geometric characteristics of the U-shaped structure, forming a continuously distributed curved surface contact between the conductive sheet 627 and the contact, effectively increasing the conductive contact area and avoiding the damage of the oxide layer caused by local contact stress concentration. As Figure 5 and Figure 9As shown, an elastic support structure is provided between the conductive sheet 627 and the support head. The elastic support structure between the conductive sheet 627 and the support head is to provide a controllable deformation support force during the expansion of the conductive sheet 627. The elastic support structure acts in cooperation with the built-in magnetic repulsion force and the mechanical reset component to form a gradient distribution of support stiffness when the conductive sheet 627 expands outward. It can not only restrain the structural damage caused by excessive deformation of the conductive sheet 627, but also ensure a uniform contact pressure with the contact surface. This structure balances the elastic restoring force of the conductive sheet 627 and the external contact reaction force by dynamically adjusting the support stiffness, so that the conductive interface maintains a stable contact state during high-voltage and large-current tests; 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 power connection head 628 is fixedly installed in the connector 629. One end of the power connection head 628 is connected to the battery cell 64, and the other end of the power connection head 628 is in sliding contact with the elastic conductive sheet 627, so that when the support head bears an axial thrust, the load is evenly transmitted to the connecting rod 63 through the connector 629, avoiding structural deformation caused by stress concentration, and at the same time ensuring the precise linkage between the outward expansion movement and the axial displacement of the conductive sheet 627. The layout that the power connection head 628 is installed inside the connector 629 and in sliding contact with the conductive sheet 627 can achieve low-impedance conduction of the current of the battery cell 64. The sliding contact interface allows the conductive sheet 627 to freely slide along the surface of the power connection head 628 during the expansion process, maintaining the continuity of the electrical connection and avoiding the interference of wire winding on the mechanical movement. When the pressure plate 61 is pressed against and adheres to the incoming line end contact 51, the elastic support structure supports the conductive sheets 627 on both sides, and the outer sides of the conductive sheets 627 expand outward and abut against the incoming line end contact 51 to form a conductive contact surface, as Figure 6 and Figure 8 shown. Through the synergistic action 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 can adaptively compensate for the machining error and assembly deviation of the contact surface, fundamentally eliminating abnormal fluctuations in contact resistance.

[0033] Please refer to Figures 4-9, 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 a 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 the magnetic field change 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, driving the conductive sheet 627 to produce a radial expansion deformation, so as to closely fit the curved surface contour of the incoming line end contact 51 of the circuit breaker 5, realizing the large-area adaptive fitting of the conductive contact interface; The support head is composed of an inner slide plate 621 and an outer slide plate 622 connected by nested sliding. 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 connecting head 629. Arc-shaped support structures are provided on the outer slide plate 622 and the outer end face of the inner slide plate 621. The support head adopts the structure of the inner slide plate 621 and the outer slide plate 622 connected by nested sliding, and an elastic reset structure 626 is provided between the two, so that the inner slide plate 621 and the outer slide plate 622 can slide relative to each other axially under the drive of the electromagnetic force. The design of the fixed connection between the inner slide plate 621 and the connecting head 629 ensures the stability of power transmission, while the arc-shaped support structures on the outer slide plate 622 and the outside of the inner slide plate 621 provide uniform mechanical support for the radial expansion of the conductive sheet 627. And a buckle structure 625 is provided on the arc-shaped support structure of the inner slide plate 621. The buckle structure 625 is fixedly connected between the magnetic sheet 624 and the conductive sheet 627. The buckle structure 625 directly correlates the displacement of the magnetic sheet 624 with the deformation of the conductive sheet 627 through mechanical locking; When the electromagnet module 623 is energized, a constant magnetic field of the same polarity as the magnetic sheet 624 is generated, driving the magnetic sheet 624 to be repelled and driving the conductive sheet 627 to expand radially outward, so that the conductive sheet 627 abuts against the incoming line end contact 51. At the same time, the inner slide plate 621 and the outer slide plate 622 generate an axial contraction displacement. During this process, the inner slide plate 621 and the outer slide plate 622 generate an axial contraction displacement under the pulling force of the outward expansion of the conductive sheet 627, providing necessary space compensation for the radial deformation of the conductive sheet 627. The coupling effect of the axial contraction displacement and the radial expansion movement enables the conductive sheet 627 to fully wrap the surface of the incoming line end contact 51, forming a uniformly distributed contact pressure, thereby increasing the conductive area while avoiding material damage caused by local overload; After power-off, the elastic reset structure 626 resets the inner slide plate 621 and the outer slide plate 622 and restores the conductive sheet 627 to its initial state. This design realizes the automatic reset of the structure based on the deformation recovery characteristics of the elastic material. The elastic reset structure 626 releases the stored elastic potential energy after the electromagnetic force disappears, driving the inner slide plate 621 and the outer slide plate 622 to slide back and reset in the reverse direction, and pulling the conductive sheet 627 to contract to the initial position.

[0034] Please refer to Figures 2-9, the electromagnet module 623 is fixedly installed on both sides of the outer slide plate 622, enabling the magnetic field generated by the electromagnet to act uniformly on the magnetic sheets 624 on both sides, ensuring symmetric forces on both sides during the radial expansion of the conductive sheet 627, and avoiding skewing of the conductive sheet 627 or insufficient local contact pressure caused by uneven magnetic force on one side, thereby guaranteeing the uniformity and stability of the contact interface between the conductive sheet 627 and the incoming line terminal contact 51. Two or more groups of telescopic rods 611 are arranged equidistantly in the circumferential direction of the pressure plate 61. The equidistantly distributed telescopic rods 611 can evenly disperse the axial pressure transmitted by the pressure plate 61, preventing deflection or jamming of the elastic contact module 62 caused by local stress concentration. The coordinated action of multiple groups 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 self-adaptability of the contact pressure through the superposition effect of elastic deformation, ensuring that the pressure plate 61 can maintain stable axial alignment when contacting incoming line terminal contacts 51 of different shapes, and at the same time providing balanced mechanical support for the radial expansion of the elastic contact module 62. The connection head 629 is slidably connected to the telescopic rod 611. The design of the slidable connection between the connection head 629 and the telescopic rod 611 allows the elastic contact module 62 to achieve dynamic adjustment during axial movement, enabling the elastic contact module 62 to freely slide axially when subjected to the reaction force of the incoming line terminal contact 51, thereby adaptively compensating for the contact position deviation. This flexible connection method not only ensures the freedom of movement of the conductive sheet 627 during outward expansion, but also reduces mechanical resistance through the low friction characteristics of the sliding surface; a limit ring 612 for restricting the sliding distance of the elastic contact module 62 is also provided on the rear end face of the pressure plate 61. There are two groups of connecting rods 63, and the adaptive contacts 6 on the two groups of connecting rods 63 are respectively connected to the two groups of incoming line terminal contacts 51 of the circuit breaker 5. The independent driving mechanism of the two groups of connecting rods 63 enables the two adaptive contacts 6 to independently adjust the contact posture according to the respective corresponding contact positions, solving the problem of asynchronous contact caused by the difference in the positions of the double contacts during detection. The driving module includes a piston structure 8 and a driving motor 9. The driving motor 9 is fixedly connected to the detection platform 1 through a fixing structure. The driving motor 9 drives the calibration adjustment rod 7 to rotate around the axis through rotational movement to achieve the threaded engagement adjustment with the calibration screw. A piston structure 8 is arranged between the driving motor 9 and the calibration adjustment rod 7. The piston structure 8 drives the calibration adjustment rod 7 to axially lift through linear movement, precisely controlling the depth of its insertion into the calibration screw of the circuit breaker 5. The coordinated action of the piston and the motor enables the calibration adjustment rod 7 to complete the coherent actions of threaded alignment, pressure application, and rotational adjustment, replacing manual operation and improving the calibration accuracy. At the same time, the fixing structure ensures the stability of the driving component during operation, avoiding the influence of vibration interference on the calibration accuracy.

[0035] Working principle: During operation, first install the circuit breaker 5 to be measured on the detection platform 1, and its lateral contact surface is closely attached to the fixed plate 3. The clamping of the main body of the circuit breaker 5 in the vertical direction is realized through the spacing adjustment mechanism of the upper and lower clamping plates 2. At the same time, the front end face of the circuit breaker 5 is subjected to the axial binding force applied by the top block 4, forming a multi-directional limit 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 both as the actuator for calibrating the bimetal sheet parameters and strengthens the overall connection stiffness between the circuit breaker 5 and the clamping structure through its insertion depth. In the detection startup stage, the cylinder 10 drives the linkage plate 65 to drive the connecting rod 63 to perform axial translation, so that the adaptive contact 6 is in contact coupling with the incoming line end contact 51 of the circuit breaker 5. At this time, the power supply system applies a test current to the circuit breaker 5 through the circuit channel composed of the battery cell 64 and the conductive contact interface, accurately simulating the load state under actual working conditions. During the test, the drive module can synchronously control the calibration adjustment rod 7 to perform rotational fine-tuning to achieve the dynamic calibration of the protection parameters of the circuit breaker 5 and the continuous detection of the delay characteristics. After the test is completed, the electromagnet module 623 is powered off, and the elastic reset structure 626 makes the conductive sheet 627 automatically return to its initial shape, and each actuator resets to wait for the next detection cycle.

[0036] After the clamping is completed, the cylinder 10 drives the linkage plate 65 to drive the connecting rod 63 to advance axially, so that the pressure plate 61 of the adaptive contact 6 makes initial contact with the incoming line end contact 51 of the circuit breaker 5. As the cylinder 10 continuously applies thrust, the pressure plate 61 and the elastic contact module 62 generate relative sliding displacement, and the elastic contact module 62 gradually enters the free adjustment state. Subsequently, the electromagnet module 623 is powered on to generate a directional constant magnetic field, and the magnetic sheet 624 is driven to drive the conductive sheet 627 to expand radially outward through the repulsive force of the same-sex magnetic poles. The nested inner slide plate 621 and the outer slide plate 622 generate axial contraction displacement under the action of the outward expansion pulling force of the magnetic sheet 624 and the conductive sheet 627, providing additional length for the deformation of the conductive sheet 627, so that the outer side surface of the U-shaped conductive sheet 627 forms a distributed contact interface with the curved surface of the incoming line end contact 51, realizing a stable conductive connection with a large contact area, as Figure 6 and 8As shown. After the test is completed, the electromagnet module 623 is powered off first to eliminate the magnetic field effect. The elastic reset structure 626 will drive the inner slide plate 621 and the outer slide plate 622 to reset, driving the conductive sheet 627 to return to its initial converged state. Subsequently, the cylinder 10 acts reversely to completely separate the adaptive contact 6 from the circuit breaker 5, completing the detection cycle. This contact method enables the conductive sheet 627 to effectively cover the area where the surface curvature of the incoming line terminal contact 51 changes, greatly increasing the effective conductive area. When the contact interface area increases, since the current distribution density per unit area decreases, it effectively avoids the phase change critical temperature of the metal material and fundamentally inhibits the formation of welding. And because the contact resistance is inversely proportional to the square root of the effective contact area, the expansion of the contact area greatly reduces the total contact resistance, significantly reducing the amount of Joule heat generated, and thus preventing the formation of the 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 microscopic contact points, maintaining a stable conductive path and avoiding arc discharge caused by a sudden increase in instantaneous resistance. And after the power is off, the adaptive contact 6 is quickly physically separated from the electromagnet module through the elastic reset structure 626, effectively increasing the separation speed between the conductive sheet 627 and the incoming line terminal contact 51, so that the electrode gap reaches the safety threshold before the minimum breakdown distance required for arc formation is established, blocking the generation of arcs. At the same time, the balanced current distribution can effectively reduce the fluctuation of the contact resistance, ensuring the stability of the current parameters during the test and providing a reliable electrical contact guarantee for the accurate detection of the protection characteristics of the circuit breaker 5.

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

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive coupling circuit breaker detection device, comprising a detection platform (1) and a clamping structure fixedly installed thereon, a circuit breaker (5) is arranged on the clamping structure, the clamping structure includes a clamping plate (2) and a fixing plate (3), the fixing plate (3) is fixedly installed on the detection platform (1), and it is characterized in that: The upper and lower ends of the fixed plate (3) are fixedly connected with the clamping plates (2). The upper and lower ends of the front end face of the fixed plate (3) are fixedly connected with the pressing blocks (4). The front end face of the circuit breaker (5) abuts against the pressing blocks (4), and the upper and lower end faces of the circuit breaker (5) are pressed against the clamping plates (2). A connection module connected to the power supply is also slidably connected to the detection platform (1). The connection module is in contact with the incoming line end contact (51) of the circuit breaker (5). A cylinder (10) for controlling the sliding of the connection module is also fixedly installed on the detection platform (1). A calibration adjustment rod (7) for adjusting the calibration screw of the circuit breaker (5) is also installed on the detection platform (1). A driving module for driving the calibration adjustment rod (7) to rotate and axially lift is also connected between the calibration adjustment rod (7) and the detection platform (1).

2. An adaptive coupled circuit breaker detection device according to claim 1, characterized in that: 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). One end of the connecting rod (63) is fixedly installed with the adaptive contact (6), and the other end of the connecting rod (63) is fixedly installed with the linkage plate (65). The linkage plate (65) is fixedly connected to the driving end of the cylinder (10). The adaptive contact (6) is in contact with the incoming line end contact (51). A battery core (64) is arranged in the connecting rod (63). One end of the battery core (64) is connected to the adaptive contact (6), and the other end of the battery core (64) is connected to a power supply.

3. An adaptive coupling circuit breaker detection device according to claim 2, characterized in that: There are two groups of the connecting rods (63), and the adaptive contacts (6) on the two groups of the connecting rods (63) are respectively connected to the two groups of the incoming line end contacts (51) of the circuit breaker (5).

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

5. An adaptive coupled circuit breaker detection device according to claim 2, characterized in that: The adaptive contact (6) includes a pressing plate (61) connected to the incoming line end contact (51) and an elastic contact module (62) communicated with the battery core (64). The pressing plate (61) and the elastic contact module (62) form an axially relative sliding structure through a sliding connection. An elastic telescopic rod (611) is arranged between the pressing 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). When the pressing plate (61) is pressed by an external force against the incoming line end contact (51), the elastic contact module (62) generates a sliding displacement along the axis of the connecting rod (63) and slides out from the position of the pressing plate (61), and the two end faces of the elastic contact module (62) radially expand, so that the expanded end face of the elastic contact module (62) forms a conductive contact interface with the incoming line end contact (51).

6. The adaptive coupling circuit breaker detection device according to claim 5, wherein: The elastic contact module (62) includes a connection head (629), a power connection head (628), and a support head. An elastic conductive sheet (627) with a U-shaped cross-section on the side is wrapped around the outer periphery of the support head, and an elastic support structure is provided between the conductive sheet (627) and the support head. One end of the connection head (629) is fixedly connected to the support head, the other end of the connection head (629) is fixedly connected to the connecting rod (63), the power connection head (628) is fixedly embedded in the connection head (629), one end of the power connection head (628) is connected to the battery cell (64), and the other end of the power connection head (628) is in sliding contact with the elastic conductive sheet (627). When the pressing plate (61) is pressed against the incoming line end contact (51), the elastic support structure supports the conductive sheets (627) on both sides, causing the outer sides of the conductive sheets (627) to expand outward and abut against the incoming line end contact (51) to form a conductive contact surface.

7. An adaptive coupling circuit breaker detection device according to claim 6, characterized in that: The connection head (629) is in sliding connection with the telescopic rod (611); a limit ring (612) for restricting the sliding distance of the elastic contact module (62) is further provided on the rear end surface of the pressing plate (61).

8. An adaptive coupling circuit breaker detection device according to claim 6, characterized in that: 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 a soft magnetic material and is attached to the inner surface of the conductive sheet (627). The support head is composed of an inner sliding plate (621) and an outer sliding plate (622) that are nested and slidably connected. An elastic reset structure (626) is provided between the inner sliding plate (621) and the outer sliding plate (622). The inner sliding plate (621) is fixedly connected to the connection head (629). Arc-shaped support structures are provided on the outer side end faces of both the outer sliding plate (622) and the inner sliding plate (621). A buckle structure (625) is provided on the arc-shaped support structure of the inner sliding plate (621). The buckle structure (625) is fixedly connected between the magnetic sheet (624), the conductive sheet (627). When the electromagnet module (623) is energized, a constant magnetic field with the same polarity as the magnetic sheet (624) is generated, driving the magnetic sheet (624) to be repelled and driving the conductive sheet (627) to expand radially outward, causing the conductive sheet (627) to abut against the incoming line end contact (51). At the same time, the inner sliding plate (621) and the outer sliding plate (622) generate an axial contraction displacement. After power-off, the elastic reset structure (626) resets the inner sliding plate (621) and the outer sliding plate (622) and restores the conductive sheet (627) to its initial shape.

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

10. An adaptive coupling circuit breaker detection device according to claim 5, characterized in that: Two or more groups of telescopic rods (611) are arranged at equal intervals along the circumferential direction of the pressing plate (61).

Images