Contactor contact resistance detection device for power distribution equipment

Abstract

The invention discloses a contactor contact resistance detection device for power distribution equipment, and relates to the technical field of contactor detection, the contactor contact resistance detection device comprises a workbench, a first supporting table and a second supporting table which are both used for conveying a first supporting seat, and the first supporting seat is provided with a plurality of clamping blocks; a second supporting seat is fixedly mounted in the reference frame, a bearing plate is arranged on the second supporting seat, and a three-phase binding post is fixedly mounted on the bearing plate; an epitaxial plate is fixedly installed on the side portion of the reference frame, an epitaxial frame is arranged on the epitaxial plate, two supports which are symmetrically arranged are fixedly installed on the two sides of the epitaxial frame, three probe columns are arranged in each support, each probe column is connected with a resistance tester, and the probe columns extend into contact inner grooves of the contactor and detect the resistance value of each contact. The defects of low efficiency, poor precision, insufficient coverage and potential safety hazards of traditional manual detection are overcome, and a high-reliability and integrated technical solution is provided for contactor contact resistance detection operation.

Description

Technical Field

[0001] The invention relates to the technical field of contactor detection, and in particular discloses a contact point resistance detection device for a contactor used in power distribution equipment. Background Art

[0002] The contactor in power distribution equipment is an electromagnetic automatic switching device, mainly used for remote or automatic control of the on and off of high-current load circuits. From a functional point of view, its core role is to drive the electromagnetic system through a small-power control signal to achieve efficient connection and disconnection of the main circuit. It is suitable for scenarios with frequent operations, such as motor start and stop, lighting system control or distribution line switching. Structurally, it is mainly composed of three parts: an electromagnetic mechanism, a contact system and an arc extinguishing device: the electromagnetic mechanism contains a coil, an iron core and an armature. When energized, it generates a magnetic field that attracts the armature to move, driving the contact action; the contact system is divided into main contacts and auxiliary contacts. The main contacts are made of silver-based alloy materials to carry load currents of tens to thousands of amperes, and the auxiliary contacts are used to control circuit signal transmission.

[0003] The long-term on-off current of the contactor contacts can easily lead to an abnormal increase in contact resistance due to oxidation, ablation or loosening, causing local overheating, accelerated insulation aging and even fire; at the same time, excessively high contact resistance will increase line losses, reduce the voltage stability at the load end, and may cause arcing or false power failure. Therefore, regular resistance testing of the contactor is required to effectively prevent failures.

[0004] Currently, most contactor contact resistance tests require manual inspection. First, the inspection requires powering off and disassembling the equipment casing, and measuring the contacts one by one, which is time-consuming and labor-intensive. Especially when the distribution system is large and the number of contactors is large, the inspection cycle is significantly extended. At the same time, when operators directly contact live parts or residual charges, there is a risk of electric shock or arc burns. Secondly, the data accuracy and reliability are insufficient. When manually measuring with a multimeter or handheld micro-ohmmeter, it is easy to cause reading deviations due to uneven probe contact pressure, incomplete penetration of the oxide layer on the contact surface, or environmental interference, making it difficult to accurately reflect the actual conduction state of the contact. In addition, there is a lack of dynamic working condition simulation, and only static resistance can be measured. It is impossible to evaluate the resistance change trend of the contact under power-on heating or vibration conditions. Therefore, manual detection methods can no longer meet the operation and maintenance requirements of highly reliable and intelligent modern distribution systems. Summary of the Invention

[0005] In view of the problems of low operating efficiency and poor data reliability in current contactor detection operations, the present invention provides a contact resistance detection device for contactors used in power distribution equipment.

[0006] To solve the above problems, the present invention provides the following technical solutions: A contact resistance detection device for a contactor of a power distribution device comprises a workbench, wherein a first support platform vertically lifted and lowered in the Z-axis direction is provided on the workbench, two second support platforms symmetrically arranged are provided on both sides of the first support platform, the first support platform and the second support platform are linearly arranged in the Y-axis direction, the second support platforms are both fastened to the workbench, the first support platform and the second support platform are both used for linearly conveying a first support seat in the Y-axis direction, a plurality of clamping blocks are installed on the first support seat, and the clamping blocks are used for fixing and clamping the contactor; a reference frame movable in the Y-axis direction is provided on the workbench, The second support base is provided with a receiving plate that can be displaced along the X-axis direction, and a three-phase terminal is fixedly installed on the receiving plate. The three-phase terminal is connected to the external power supply equipment and electrically connected to the coil of the contactor, so as to continuously supply power to the contactor; the side of the reference frame is fixedly installed with an extension plate, and the extension plate is provided with an extension frame that can move along the Y-axis and Z-axis directions, and two symmetrically arranged supports are fixedly installed on both sides of the extension frame, and three probe columns are provided in each support, and each probe column is connected to a resistance tester. The probe column extends into the contact groove of the contactor and detects the resistance value of each contact.

[0007] Preferably, a through square groove is provided on the workbench, a foot seat is provided in the square groove, the top of the foot seat is fastened to the first support platform, a first linear cylinder fastened to the workbench is provided on the side of the square groove, the piston rod of the first linear cylinder is arranged along the Z-axis direction, a first connecting seat is fixedly installed on the end of the piston rod of the first linear cylinder, and a stabilizing plate fastened to the top of the first foot seat is provided on the top of the first connecting seat.

[0008] Preferably, a plurality of first pulleys are rotatably installed on the inner sides of the first support platform and the second support platform, and the first pulleys on the same side are jointly wound around the guide belt, and the first support seat is in contact with the outer peripheral surface of the guide belt, and the first support seat is fixedly installed on both sides of the first support platform and the second support platform, and a rotating rod is rotatably installed between the two hanging plates on both sides of the first support platform and the second support platform, and a plurality of second pulleys are fixedly sleeved on the periphery of the rotating rod, and the second pulley is in contact with the outer peripheral surface of the guide belt, and the first motor is fixedly installed on the inner side of the hanging plate, and the first rotating wheel and the second rotating wheel are provided on the outer side of the hanging plate, and the first rotating wheel is fastened on the outer wall of the first motor output shaft, and the second rotating wheel is fastened on the outer wall of the rotating rod, and the first rotating wheel and the second rotating wheel are connected through a rotating wheel belt transmission.

[0009] Preferably, the inner sides of the first support platform and the second support platform are provided with mounting grooves, the mounting grooves are arranged below the first pulley, a long rod bolt is fixedly installed in the mounting groove, the periphery of the long rod bolt is rotatably fitted with a third pulley, a plurality of cross bars are fixedly installed on the inner side of the lifting plate, the cross bars are arranged at the bottom of the rotating rod and are symmetrically distributed, the periphery of each cross bar is rotatably fitted with a fourth pulley, the third pulley is in contact with the outer circumferential surface of the guide belt, and the fourth pulley is in contact with the inner circumferential surface of the guide belt.

[0010] Preferably, bosses are provided on the inner sides of the first support platform and the second support platform, grooves are provided at the bottom corners on both sides of the first support seat, and the guide belt is arranged between the bosses and the grooves; a stabilizing platform is provided on the inner side of the first support platform, and the stabilizing platform is arranged below the first support platform, and the stabilizing platform is fastened to the workbench.

[0011] Preferably, a first electromagnetic slide rail is fixedly installed on the workbench, and the first electromagnetic slide rail is arranged along the Y-axis direction. A second motor that is tightly connected to the workbench is provided on the side of the first electromagnetic slide rail, and the second motor is used to provide driving force to the first electromagnetic slide rail. A first slide is slidably installed on the first electromagnetic slide rail, and the first slide is tightly connected to the reference frame through a second connecting seat. A first guide rail arranged along the Y-axis direction is fixedly installed on the workbench, and the first guide rail is arranged on the side of the first electromagnetic slide rail. A first slider is slidably installed on the first guide rail, and the first slider is tightly connected to the bottom end of the reference frame.

[0012] Preferably, a second linear cylinder is fixedly mounted on the second support seat, the piston rod of the second linear cylinder is arranged along the X-axis direction and the end thereof faces the first support seat, and a third connecting seat is fixedly mounted on the end of the piston rod of the second linear cylinder, and the third connecting seat is fastened to the receiving plate.

[0013] Preferably, the extension plate is fastened to the reference frame through a right-angle frame, and a second electromagnetic slide rail is installed on the extension plate, the second electromagnetic slide rail is arranged along the Y-axis direction, and a third motor is provided on the side of the second electromagnetic slide rail, and the third motor is used to provide driving force to the second electromagnetic slide rail, and a second slide is slidably installed on the second electromagnetic slide rail, and the second slide is fastened to a fourth connecting seat, and a second guide rail arranged along the Y-axis direction is provided on the side of the second electromagnetic slide rail, and the second guide rail is arranged on the side of the second electromagnetic slide rail, and a second slider is slidably installed on the second guide rail, and the second slider is fastened to the bottom end of the fourth connecting seat, and the top of the fourth connecting seat is fixedly installed with a third electromagnetic slide rail arranged along the Z-axis direction, and a third slide is slidably installed on the third electromagnetic slide rail, and the third slide is fastened to the extension frame.

[0014] Preferably, three electric telescopic rods are fixedly installed in the support, the electric telescopic rods correspond to the probe columns one by one, the electric telescopic rods are arranged along the Z-axis direction and the travel rods are set downward, and the top of the probe column is tightly connected to the travel rod of the electric telescopic rod.

[0015] Preferably, a horizontal plate is fixedly installed at the bottom of the extension frame, and right-angle blocks are fastened to both ends of the horizontal plate. The right-angle blocks and supports are made of insulating rubber material, and strip grooves are provided in the right-angle blocks. The probe column is arranged inside the strip grooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The contactor contact resistance detection device designed in the present invention realizes rapid positioning and batch continuous detection of contactors through a multi-axis linear conveying system and a modular card block fixing structure, significantly improving efficiency and avoiding the risk of manual disassembly and assembly; its three-phase terminal continuous power supply simulates real working conditions, and cooperates with the probe column to automatically and accurately extend into the contact groove, penetrate the oxide layer and stably measure the dynamic resistance value, solving the error problems of uneven manual contact and static detection; the symmetrical multi-probe layout synchronously covers the main and auxiliary contacts, and combines mechanical isolation operation to eliminate the hidden danger of electric shock. At the same time, the data integration system analyzes the resistance change trend in real time to realize degradation warning and fault prediction, and the modular adjustable structure is adaptable to various contactor models, taking into account the comprehensiveness of detection and scene adaptability, and systematically overcomes the defects of low efficiency, poor accuracy, insufficient coverage and safety hazards of traditional manual detection, providing a highly reliable and integrated technical solution for the intelligent operation and maintenance of power distribution equipment, and therefore has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts. Figure 1 It is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the square groove structure of the present invention; Figure 3 This is a schematic diagram of the installation structure of the first support platform and the first footrest of the present invention; Figure 4 This is a schematic diagram of the structure of the first connecting seat and the stabilizing plate in cooperation with each other in the present invention; Figure 5 This is a schematic diagram of the guide belt installation structure of the present invention; Figure 6 This is a schematic diagram of the installation structure of the third pulley and the fourth pulley of the present invention; Figure 7 Schematic diagram of the internal structure of the liquid inlet cavity of the present invention; Figure 8 This is a schematic structural diagram of the first support base of the present invention; Figure 9 This is a schematic diagram of the reference frame installation structure of the present invention; Figure 10 This is a schematic diagram of the three-phase terminal installation structure of the present invention; Figure 11 This is a schematic diagram of the installation structure of the extension frame of the present invention; Figure 12 This is a schematic diagram of the probe column installation structure of the present invention; In the figure: 1. Workbench, 2. First support platform, 3. Second support platform, 4. First support base, 5. Block, 6. Reference frame, 7. Second support base, 8. Adapter plate, 9. Three-phase terminal, 10. Extension plate, 11. Extension frame, 12. Support, 13. Probe column, 14. Square slot, 15. First foot, 16. First linear cylinder, 17. First connecting base, 18. Stabilizing plate, 19. First pulley, 20. Guide belt, 21. Lifting plate, 22. Rotating rod, 23. Second pulley, 24. First motor, 25. First rotating wheel, 26. Second rotating wheel, 27. Rotating wheel belt, 28. Mounting slot, 29. Second connecting base , 30. Long rod bolt, 31. The third pulley, 32. Cross bar, 33. Strip groove, 34. The fourth pulley, 35. Boss, 36. Groove, 37. Stabilizing platform, 38. The first electromagnetic slide rail, 39. The second motor, 40. The first slide, 41. The first guide rail, 42. The first slider, 43. The second linear cylinder, 44. The third connecting seat, 45. The right-angle frame, 46. The second electromagnetic slide rail, 47. The third motor, 48. The second slide, 49. The fourth connecting seat, 50. The second guide rail, 51. The second slider, 52. The third electromagnetic slide rail, 53. The third slide, 54. The electric telescopic rod, 55. The horizontal plate, 56. The right-angle block. DETAILED DESCRIPTION

[0018] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] This specific embodiment provides a contactor contact resistance detection device for power distribution equipment, such as Figures 1-12As shown, the workbench 1 includes a workbench 1, which is composed of a frame beam and a flat top plate. A plurality of supporting feet are provided at the bottom of the frame beam. The bottom of the supporting feet is made of rubber material, which can improve the stability of the entire device and facilitate the fixing of the entire device in the resistance detection operation area.

[0020] The workbench 1 is provided with two square slots 14 extending therethrough, symmetrically arranged on the planar top plate of the workbench 1. Each square slot 14 is provided with a foot 15, which fits into the two square slots 14 with clearance. The tops of the foot 15 are fixedly connected to the first support platform 2. The inner sides of the two square slots 14 are provided with mounting slots, into which the first linear cylinder 16 is fastened, thereby securing the cylinder body of the first linear cylinder 16 to the workbench 1. The piston rod of the first linear cylinder 16 is arranged along the Z-axis direction, and a first connecting seat 17 is fixedly installed on the end of the piston rod of the first linear cylinder 16. The first connecting seat 17 can adjust the arrangement position along the Z-axis direction following the piston rod of the first linear cylinder 16; stabilizing plates 18 are fixedly installed at both ends of the top of the first connecting seat 17, and the two stabilizing plates 18 are respectively fastened to the top ends of the two foot seats 15, so that the first linear cylinder 16 can directly drive the foot seat 15 to move in the square groove 14 along the Z-axis direction, thereby adjusting the arrangement height of the first support platform 2.

[0021] Two symmetrically arranged second support platforms 3 are provided on both sides of the first support platform 2. The two second support platforms 3 are fastened to the workbench 1 through a base, and the two second support platforms 3 are arranged at the same height along the Z-axis direction. A plurality of first pulleys 19 are rotatably installed on the inner sides of the first support platform 2 and the second support platform 3. The first pulleys 19 on the same side of the first support platform 2 and the second support platform 3 are jointly wound with a guide belt 20; therefore, two symmetrically arranged guide belts 20 are provided in each of the first support platform 2 and the second support platform 3. The guide belts 20 are used to linearly transport the first support seat 4 along the Y-axis direction, so that the first support seat 4 passes through the second support platform 3 on the left, the first support platform 2, and the second support platform 3 on the right in turn. Since the installation structure of the guide belts 20 in the first support platform 2 and the second support platform 3 is the same, this specific embodiment will be introduced in detail based on the structure in the first support platform 2.

[0022] A symmetrically arranged hanging plate 21 is fixedly mounted on both sides of the first support platform 2. A rotating rod 22 is rotatably mounted between the two hanging plates 21 on either side of the first support platform 2. The rotating rod 22 rotates in conjunction with the two hanging plates 21 via a bearing sleeve. Two second pulleys 23 are fixedly mounted on the periphery of the rotating rod 22, one adjacent to the two hanging plates 21 at either end of the rotating rod 22. The second pulleys 23 contact the outer circumference of the guide belt 20. A first motor 24 is fixedly mounted on the inner side of the hanging plate 21 on the outer side of the first support platform 2. A first rotating wheel 25 and a second rotating wheel 26 are disposed on the outer side of the hanging plate 21. The first rotating wheel 25 is fastened to the outer wall of the output shaft of the first motor 24, while the second rotating wheel 26 is fastened to the outer wall of the rotating rod 22. The first and second rotating wheels 25 and 26 are connected by a rotating wheel belt 27, thereby enabling the first motor 24 to drive the rotating rod 22 to rotate between the two hanging plates 21.

[0023] The inner side of each of the first support platforms 2 is provided with a mounting groove 28, which is arranged below the first pulley 19. A long rod bolt 30 is fixedly installed in the mounting groove 28. Two long rod bolts 30 are provided and symmetrically arranged on the inner side of the first pulley 19. A third pulley 31 is rotatably mounted on the periphery of each long rod bolt 30. Two cross bars 32 are fixedly installed on the inner side of the hanging plate 21. The two cross bars 32 are respectively arranged at the bottom of the rotating rod 22 and are symmetrically distributed on both sides thereof. A fourth pulley 34 is rotatably mounted on the periphery of the two cross bars 32. The third pulley 31 contacts the outer circumference of the guide belt 20, and the fourth pulley 34 contacts the inner circumference of the guide belt 20. By adjusting the installation position of the long rod bolt 30 in the mounting groove 28, the tightness of the guide belt 20 can be flexibly adjusted to stably support the first support base 4.

[0024] The first support platform 2 is provided with bosses 35 on its inner side, and the first support seat 4 has a Z-shaped corner structure on both sides, with grooves 36 formed at the bottom corners of its outer edges. The guide belt 20 is arranged between the bosses 35 and the grooves 36, thereby facilitating the stable transportation of the first support seat 4 within the first support platform 2. In addition, a stabilizing platform 37 is provided on the inner side of the first support platform 2. The stabilizing platform 37 is arranged below the first support platform 2 and is tightly connected to the workbench 1, so that the stabilizing platform 37 provides an emergency support structure for the first support seat 4, ensuring the supporting capacity of the first support seat 4.

[0025] Three clamping blocks 5 are mounted on the first support base 4, with one clamping block 5 on one side and two clamping blocks 5 on the other side. The three clamping blocks 5 arranged in a triangular pattern facilitate clamping the contactor. The first support base 4 is provided with multiple circular holes that facilitate fastening the contactor to the first support base 4, thereby forming an integrated structure and further enhancing the connection between the contactor and the first support base 4.

[0026] A first electromagnetic slide 38 is fixedly mounted on the workbench 1. The first electromagnetic slide 38 is arranged along the Y-axis and positioned to the side of the first support platform 2. A second motor 39 is mounted to the side of the first electromagnetic slide 38. The second motor 39 is securely connected to the workbench 1 via a motor mount. The output shaft of the second motor 39 is drivingly connected to the input shaft of the first electromagnetic slide 38, thereby providing driving force to the first electromagnetic slide 38. A first slide 40 is slidably mounted on the first electromagnetic slide 38. The first slide 40 is securely connected to the reference frame 6 via a second connecting seat 29. The reference frame 6 is positioned above the workbench 1. Two first guide rails 41 are fixedly mounted on the workbench 1 along the Y-axis. Both first guide rails 41 are positioned between the first electromagnetic slide 38 and the first support platform 4. Two first sliders 42 are slidably mounted on each first guide rail 41. The four first sliders 42 are collectively securely connected to the bottom end of the reference frame 6, enabling the reference frame 6 to move along the Y-axis under the drive of the first electromagnetic slide 38.

[0027] A second support base 7 is fixedly mounted inside the reference frame 6. A second linear cylinder 43 is fixedly mounted on the second support base 7. The piston rod of the second linear cylinder 43 is arranged along the X-axis direction with its end facing the first support base 4. A third connecting base 44 is fixedly mounted on the end of the piston rod of the second linear cylinder 43. The third connecting base 44 is tightly connected to the receiving plate 8, thereby displacing the receiving plate 8 along the X-axis direction. A three-phase terminal 9 is fixedly mounted on the receiving plate 8. One end of the three-phase terminal 9 is connected to an external power supply device, and the other end of the three-phase terminal 9 contacts the coil of the contactor, thereby electrically connecting it to the contactor and continuously supplying power to the contactor.

[0028] An extension plate 10 is fixedly mounted on the side of the reference frame 6, and the extension plate 10 is arranged above the second support base 7. The extension plate 10 is fastened to the reference frame 6 via two right-angle brackets 45. A second electromagnetic slide rail 46 is mounted on the extension plate 10, and the second electromagnetic slide rail 46 is arranged along the Y-axis direction. A third motor 47 is provided on the side of the second electromagnetic slide rail 46, and the third motor 47 is fixedly mounted on the side of the second electromagnetic slide rail 46 via a motor support, so that the third motor 47 is used to provide driving force to the second electromagnetic slide rail 46. A second slide 48 is slidably mounted on the second electromagnetic slide 46. The second slide 48 is securely connected to a fourth connecting seat 49. A second guide rail 50, arranged along the Y-axis, is provided on the side of the second electromagnetic slide 46. The second guide rail 50 is arranged on the side of the second electromagnetic slide 46. A second slider 51 is slidably mounted on the second guide rail 50. The second slider 51 is securely connected to the bottom end of the fourth connecting seat 49. The fourth connecting seat 49 moves along the Y-axis under the drive of the second electromagnetic slide 46. A third electromagnetic slide 52, arranged along the Z-axis, is fixedly mounted on the top of the fourth connecting seat 49. A third slide 53 is slidably mounted on the third electromagnetic slide 52. The third slide 53 is securely connected to the extension frame 11. The extension frame 11 moves along the Z-axis under the drive of the third electromagnetic slide 52.

[0029] Two symmetrically arranged supports 12 are fixedly mounted on either side of the extension frame 11. Three electric telescopic rods 54 are fixedly mounted within each support 12. These rods 54 are arranged along the Z-axis with the travel rod facing downward. A probe post 13 is fixedly mounted at the bottom end of each travel rod 54, with each rod 54 corresponding to a probe post 13. The three probe posts 13 on each side are connected to a resistance tester via wires. Each probe post 13 can be inserted into the contactor's contact slot to detect the resistance value of each contact.

[0030] Furthermore, a horizontal plate 55 is fixedly mounted at the bottom of the extension frame 11. Two ends of this plate are secured with right-angled blocks 56. These blocks 56 and the support 12 are made of insulating rubber to prevent damage to the detection device due to live contactors. Each right-angled block 56 is provided with a strip-shaped slot 33, and the probe posts 13 are arranged within these slots, thereby enhancing the installation stability of the probe posts 13.

[0031] The working principle of the present invention is: Before the contactor contact resistance test operation, the contactor to be tested can be fixedly installed on the first support seat 4 and stably loaded by the clamping block 5. The first support seat 4 loaded with the contactor is placed on the second support platform 3 on the left side, and the first motor 24 in the second support platform 3 on the left side is started, so that the guide belt 20 in the second support platform 3 on the left side transports the first support seat 4 along the Y-axis direction and transports it to the first support platform 2. When the first support seat 4 is stably arranged inside the first support platform 2, the layout position of the reference frame 6 is appropriately adjusted under the action of the first electromagnetic slide 38, and the layout height of the first support platform 2 along the Z-axis direction is raised under the action of the first linear cylinder 16. Under the action of the second linear cylinder 43, the three-phase terminal 9 continuously supplies power to the contactor, so that the contactor is in a continuously energized state. Under the regulation of the second electromagnetic slide 46, the layout position of the fourth connecting seat 49 along the Y-axis direction is appropriately adjusted, and the layout position of the extension frame 11 along the Z-axis direction is adjusted by the third electromagnetic slide 52, so that the three probe columns 13 in the support 12 extend into the contact groove of the contactor, and their resistance detection value is displayed on the resistance tester, so that the tester can obtain the resistance detection status in real time. After the resistance detection operation is completed, the power supply of the contactor is disconnected, and the first support seat 4 is adjusted to the same height as the second support platform 3 on both sides by the first linear cylinder 16, so that the first support seat 4 is transported to the second support platform 3 on the right side, and the tester can remove it from the test device.

[0032] Compared with the prior art, the contactor contact resistance detection device designed by the present invention has significant advantages over manual detection: Through the multi-axis linear conveying system (support table, reference frame) and the card block fixing structure, the contactor can be quickly positioned and continuously tested in batches without frequent power-off and disassembly, which greatly shortens the detection cycle; the continuous power supply of the three-phase terminal can simulate the actual power-on state of the contactor, and the probe column automatically extends into the contact groove and applies stable pressure to penetrate the oxide layer to obtain the real dynamic resistance value, avoiding errors caused by uneven manual contact or environmental interference; the symmetrically arranged multiple probes synchronously detect the main contacts and auxiliary contacts, and cooperate with the arc extinguishing device bypass design to ensure full contact coverage; mechanical operation isolates manual direct contact with live parts, reducing the risk of electric shock and arcing; the resistance tester is directly associated with the probe, records and analyzes data in real time, eliminates the subjective bias of manual recording, supports degradation trend warning, and improves fault prediction capabilities; the modular support base and adjustable extension frame are adapted to different types of contactors to expand the detection scenario. In summary, the present invention has a very broad application prospect.

[0033] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A contact resistance detection device for a contactor of a power distribution device, comprising a workbench (1), characterized in that: The workbench (1) is provided with a first support platform (2) that is vertically lifted along the Z-axis direction, two second support platforms (3) are symmetrically arranged on both sides of the first support platform (2), the first support platform (2) and the second support platform (3) are linearly arranged along the Y-axis direction, the second support platforms (3) are both fastened to the workbench (1), the first support platform (2) and the second support platform (3) are both used for linearly conveying the first support seat (4) along the Y-axis direction, a plurality of clamping blocks (5) are installed on the first support seat (4), and the clamping blocks (5) are used for fixing the clamping contactor; the workbench (1) is provided with a reference frame (6) that moves along the Y-axis direction, the reference frame (6) is fixedly installed with a second support seat (7), and the second support seat (7) is fixedly installed in the reference frame (6). The seat (7) is provided with a receiving plate (8) that is displaced along the X-axis direction, and a three-phase terminal (9) is fixedly installed on the receiving plate (8), and the three-phase terminal (9) is connected to an external power supply device and electrically connected to the coil of the contactor, so as to continuously supply power to the contactor; an extension plate (10) is fixedly installed on the side of the reference frame (6), and an extension frame (11) that moves along the Y-axis and Z-axis directions is provided on the extension plate (10), and two symmetrically arranged supports (12) are fixedly installed on both sides of the extension frame (11), and three probe columns (13) are provided in each support (12), and each probe column (13) is connected to a resistance tester, and the probe column (13) extends into the contact groove of the contactor and detects the resistance value of each contact.

2. A contact resistance detection device for a contactor used in power distribution equipment according to claim 1, characterized in that: The workbench (1) is provided with a through square groove (14), a foot seat (15) is provided in the square groove (14), the top of the foot seat (15) is fastened to the first support platform (2), a first linear cylinder (16) fastened to the workbench (1) is provided on the side of the square groove (14), the piston rod of the first linear cylinder (16) is arranged along the Z-axis direction, the end of the piston rod of the first linear cylinder (16) is fixedly installed with a first connecting seat (17), and the top of the first connecting seat (17) is provided with a stabilizing plate (18) fastened to the top of the first foot seat (15).

3. The contact resistance detection device for a contactor used in a power distribution equipment according to claim 1, characterized in that: A plurality of first pulleys (19) are rotatably mounted on the inner sides of the first support platform (2) and the second support platform (3), and a guide belt (20) is commonly mounted around the first pulleys (19) on the same side. The first support seat (4) is in contact with the outer peripheral surface of the guide belt (20). Both sides of the first support platform (2) and the second support platform (3) are fixedly mounted with symmetrically arranged hanging plates (21). A rotating rod (22) is rotatably mounted between the two hanging plates (21) on both sides of the first support platform (2) and the second support platform (3). The outer fixed sleeve of the rotating rod (22) A plurality of second pulleys (23) are provided, the second pulleys (23) are in contact with the outer peripheral surface of the guide belt (20), a first motor (24) is fixedly installed on the inner side of the hanging plate (21), a first rotating wheel (25) and a second rotating wheel (26) are provided on the outer side of the hanging plate (21), the first rotating wheel (25) is fastened on the outer wall of the output shaft of the first motor (24), the second rotating wheel (26) is fastened on the outer wall of the rotating rod (22), and the first rotating wheel (25) and the second rotating wheel (26) are connected to each other through a rotating wheel belt (27).

4. A contact resistance detection device for a contactor used in power distribution equipment according to claim 3, characterized in that: The inner sides of the first support platform (2) and the second support platform (3) are both provided with mounting grooves (28), the mounting grooves (28) are arranged below the first pulley (19), a long rod bolt (30) is fixedly installed in the mounting grooves (28), the outer periphery of the long rod bolt (30) is rotatably fitted with a third pulley (31), a plurality of cross bars (32) are fixedly installed on the inner side of the hanging plate (21), the cross bars (32) are arranged at the bottom of the rotating rod (22) and are symmetrically distributed, the outer periphery of each cross bar (32) is rotatably fitted with a fourth pulley (34), the third pulley (31) is in contact with the outer peripheral surface of the guide belt (20), and the fourth pulley (34) is in contact with the inner peripheral surface of the guide belt (20).

5. The contact resistance detection device for a contactor used in power distribution equipment according to claim 3, characterized in that: The inner sides of the first support platform (2) and the second support platform (3) are both provided with bosses (35), the bottom corners of both sides of the first support seat (4) are both provided with grooves (36), and the guide belt (20) is arranged between the bosses (35) and the grooves (36); a stabilizing platform (37) is provided on the inner side of the first support platform (2), the stabilizing platform (37) is arranged below the first support platform (2), and the stabilizing platform (37) is fastened to the workbench (1).

6. The contact resistance detection device for a contactor used in power distribution equipment according to claim 1, characterized in that: A first electromagnetic slide rail (38) is fixedly mounted on the workbench (1), and the first electromagnetic slide rail (38) is arranged along the Y-axis direction. A second motor (39) is provided on the side of the first electromagnetic slide rail (38) and is fastened to the workbench (1). The second motor (39) is used to provide driving force to the first electromagnetic slide rail (38). A first slide table (40) is slidably mounted on the first electromagnetic slide rail (38), and the first slide table (40) is fastened to the reference frame (6) through a second connecting seat (29). A first guide rail (41) is fixedly mounted on the workbench (1) and is arranged along the Y-axis direction. The first guide rail (41) is arranged on the side of the first electromagnetic slide rail (38). A first slider (42) is slidably mounted on the first guide rail (41), and the first slider (42) is fastened to the bottom end of the reference frame (6).

7. The contact resistance detection device for a contactor used in power distribution equipment according to claim 1, characterized in that: A second linear cylinder (43) is fixedly mounted on the second support seat (7), a piston rod of the second linear cylinder (43) is arranged along the X-axis direction and an end thereof faces the first support seat (4), a third connecting seat (44) is fixedly mounted on the end of the piston rod of the second linear cylinder (43), and the third connecting seat (44) is fastened to the receiving plate (8).

8. The contact resistance detection device for a contactor used in power distribution equipment according to claim 1, characterized in that: The extension plate (10) is fastened to the reference frame (6) through a right-angle frame (45), a second electromagnetic slide rail (46) is installed on the extension plate (10), the second electromagnetic slide rail (46) is arranged along the Y-axis direction, a third motor (47) is provided on the side of the second electromagnetic slide rail (46), the third motor (47) is used to provide a driving force to the second electromagnetic slide rail (46), a second slide table (48) is slidably installed on the second electromagnetic slide rail (46), the second slide table (48) is fastened to a fourth connecting seat (49), the second electromagnetic slide rail (46) is fastened to a fourth connecting seat (49), and the second electromagnetic slide rail (46) is fastened to a fourth connecting seat (49). 6) is provided with a second guide rail (50) arranged along the Y-axis direction on the side, the second guide rail (50) is arranged on the side of the second electromagnetic slide rail (46), a second slider (51) is slidably mounted on the second guide rail (50), the second slider (51) is fastened to the bottom end of the fourth connecting seat (49), a third electromagnetic slide rail (52) arranged along the Z-axis direction is fixedly mounted on the top end of the fourth connecting seat (49), a third slide table (53) is slidably mounted on the third electromagnetic slide rail (52), and the third slide table (53) is fastened to the extension frame (11).

9. The contact resistance detection device for a contactor used in power distribution equipment according to claim 1, characterized in that: Three electric telescopic rods (54) are fixedly installed in the support (12), and the electric telescopic rods (54) correspond to the probe columns (13) one by one. The electric telescopic rods (54) are arranged along the Z-axis direction and the travel rods are arranged downward. The top ends of the probe columns (13) are tightly connected to the travel rods of the electric telescopic rods (54).

10. The contact resistance detection device for a contactor used in power distribution equipment according to claim 1, characterized in that: A horizontal plate (55) is fixedly installed at the bottom of the extension frame (11), and right-angle blocks (56) are fastened to both ends of the horizontal plate (55). The right-angle blocks (56) and the support (12) are made of insulating rubber material. A strip groove (33) is provided in the right-angle block (56), and the probe column (13) is arranged inside the strip groove (33).

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