A contactor contact resistance detection device for power distribution equipment

Abstract

This invention relates to a contactor contact resistance testing device for power distribution equipment, belonging to the field of contactor testing technology. It includes a workbench, a first support platform, and a second support platform, both used for conveying the first support base. Multiple clamping blocks are installed on the first support base. A second support base is fixedly installed inside a reference frame, and a receiving plate is provided on the second support base. Three-phase terminals are fixedly installed on the receiving plate. An extension plate is fixedly installed on the side of the reference frame, and an extension frame is provided on the extension plate. Two symmetrically arranged supports are fixedly installed on both sides of the extension frame. Each support contains three probe posts, each probe post connected to a resistance tester. The probe posts extend into the contactor's contact groove and detect the resistance value of each contact. This invention overcomes the shortcomings of traditional manual testing, such as low efficiency, poor accuracy, insufficient coverage, and safety hazards, providing a highly reliable and integrated technical solution for contactor contact resistance testing.

Description

Technical Field

[0001] This invention relates to the field of contactor testing technology, and specifically discloses a contactor contact resistance testing device for power distribution equipment. Background Technology

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

[0003] When contactor contacts are constantly switching current, oxidation, erosion, or loosening can cause abnormally high contact resistance, leading to localized overheating, accelerated insulation aging, and even fire. At the same time, excessively high contact resistance can increase line losses, reduce load voltage stability, and may cause arcing or accidental power outages. Therefore, it is necessary to perform regular resistance testing on contactors to effectively prevent malfunctions.

[0004] Currently, most contactor contact resistance testing requires manual inspection. Firstly, this process necessitates power disconnection and disassembly of the equipment casing to measure each contact individually, which is time-consuming and labor-intensive, especially in large-scale power distribution systems with a large number of contactors, significantly extending the testing cycle. Furthermore, operators face the risk of electric shock or arc burns when directly contacting live parts or residual charges. Secondly, the data accuracy and reliability are insufficient. Manual measurement using multimeters or handheld micro-ohmmeters is prone to 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 true conduction state of the contacts. Moreover, the lack of dynamic operating condition simulation means that only static resistance can be measured, failing to assess the resistance change trend of the contacts under energized heating or vibration conditions. Therefore, manual testing methods are no longer sufficient to meet the high reliability and intelligent maintenance requirements of modern power distribution systems. Summary of the Invention

[0005] To address the problems of low operational efficiency and poor data reliability in current contactor testing operations, this invention provides a contactor contact resistance testing device for power distribution equipment.

[0006] To address the above problems, the present invention provides the following technical solution:

[0007] A contactor contact resistance detection device for power distribution equipment includes a worktable. A first support platform is vertically movable along the Z-axis on the worktable. Two second support platforms are symmetrically arranged on both sides of the first support platform. The first and second support platforms are linearly arranged along the Y-axis. Both second support platforms are securely connected to the worktable. The first and second support platforms are used to linearly transport a first support seat along the Y-axis. Multiple clamping blocks are installed on the first support seat for fixing and clamping the contactor. A reference frame that moves along the Y-axis is provided on the worktable, and a contactor is fixedly installed within the reference frame. The second support base has a receiving plate that moves along the X-axis. Three-phase terminals are fixedly installed on the receiving plate. The three-phase terminals are connected to an external power supply device and electrically connected to the coil of the contactor, thereby continuously supplying power to the contactor. An extension plate is fixedly installed on the side of the reference frame. An extension frame that moves along the Y-axis and Z-axis is provided on the extension plate. Two symmetrically arranged supports are fixedly installed on both sides of the extension frame. Each support has three probe posts. Each probe post is connected to a resistance tester. The probe posts extend into the contact groove of the contactor and detect the resistance value of each contact.

[0008] Preferably, the workbench has a through square groove, and a foot is provided in the square groove. The top of the foot is fixedly connected to the first support platform. A first linear cylinder is provided on the side of the square groove and is fixedly connected to the workbench. The piston rod of the first linear cylinder is arranged along the Z-axis. A first connecting seat is fixedly installed at the end of the piston rod of the first linear cylinder. A stabilizing plate is provided on the top of the first connecting seat and is fixedly connected to the top of the first foot.

[0009] Preferably, multiple first pulleys are rotatably mounted on the inner side of the first support platform and the second support platform. The first pulleys on the same side are wrapped with a guide belt. The first support base is in contact with the outer peripheral surface of the guide belt. Symmetrically arranged lifting plates are fixedly mounted on both sides of the first support platform and the second support platform. A rotating rod is rotatably mounted between the two lifting plates on both sides of the first support platform and the second support platform. Multiple second pulleys are fixedly fitted around the outside of the rotating rod. The second pulleys are in contact with the outer peripheral surface of the guide belt. A first motor is fixedly mounted on the inner side of the lifting plate. A first rotating wheel and a second rotating wheel are provided on the outer side of the lifting plate. The first rotating wheel is fastened to the outer wall of the output shaft of the first motor. The second rotating wheel is fastened to the outer wall of the rotating rod. The first rotating wheel and the second rotating wheel are connected by a rotating wheel belt drive.

[0010] 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 bolt is fixedly installed in the mounting groove. A third pulley is rotatably fitted around the long bolt. Multiple crossbars are fixedly installed on the inner side of the lifting plate. The crossbars are arranged at the bottom of the rotating rod and are symmetrically distributed. A fourth pulley is rotatably fitted around the periphery of each crossbar. 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.

[0011] Preferably, both the first support platform and the second support platform have protrusions on their inner sides, and the bottom corners of both sides of the first support platform have grooves. The guide belt is arranged between the protrusions and the grooves. A stabilizing platform is provided on the inner side of the first support platform. The stabilizing platform is arranged below the first support platform and is fastened to the worktable.

[0012] Preferably, a first electromagnetic slide rail is fixedly installed on the worktable. The first electromagnetic slide rail is arranged along the Y-axis direction. A second motor is provided on the side of the first electromagnetic slide rail and is tightly connected to the worktable. The second motor is used to provide driving force to the first electromagnetic slide rail. A first slide table is slidably installed on the first electromagnetic slide rail. The first slide table is tightly connected to the reference frame through a second connecting seat. A first guide rail is fixedly installed on the worktable along the Y-axis direction. 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 is tightly connected to the bottom end of the reference frame.

[0013] Preferably, a second linear cylinder is fixedly installed on the second support base. The piston rod of the second linear cylinder is arranged along the X-axis and its end faces the first support base. A third connecting seat is fixedly installed at the end of the piston rod of the second linear cylinder, and the third connecting seat is fastened to the receiving plate.

[0014] Preferably, the extension plate is fastened to the reference frame via a right-angle bracket. A second electromagnetic slide rail is mounted on the extension plate, the second electromagnetic slide rail being arranged along the Y-axis. A third motor is provided on the side of the second electromagnetic slide rail, the third motor being used to provide driving force to the second electromagnetic slide rail. A second slide table is slidably mounted on the second electromagnetic slide rail, the second slide table being fastened to a fourth connecting seat. A second guide rail is provided on the side of the second electromagnetic slide rail, arranged along the Y-axis. The second guide rail is arranged on the side of the second electromagnetic slide rail. A second slider is slidably mounted on the second guide rail, the second slider being fastened to the bottom end of the fourth connecting seat. A third electromagnetic slide rail, arranged along the Z-axis, is fixedly mounted on the top end of the fourth connecting seat. A third slide table is slidably mounted on the third electromagnetic slide rail, the third slide table being fastened to the extension frame.

[0015] Preferably, three electric telescopic rods are fixedly installed inside the support. Each electric telescopic rod corresponds to a probe post. The electric telescopic rods are arranged along the Z-axis and the stroke rods are set downwards. The top of the probe post is fastened to the stroke rod of the electric telescopic rod.

[0016] 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 each right-angle block is provided with a strip groove. The probe column is arranged inside the strip groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The contactor contact resistance detection device designed in this invention achieves rapid positioning and continuous batch testing of contactors through a multi-axis linear conveying system and a modular card block fixing structure, significantly improving efficiency and avoiding the risks of manual disassembly and assembly. Its three-phase terminals continuously supply power to simulate real working conditions, and the probes automatically and accurately extend into the inner groove of the contact to penetrate the oxide layer and stably measure the dynamic resistance value, solving the problems of uneven manual contact and errors in static testing. The symmetrical multi-probe layout synchronously covers the main and auxiliary contacts, and the mechanical isolation operation eliminates the risk of electric shock. At the same time, the data integration system analyzes the resistance change trend in real time, realizing deterioration warning and fault prediction. The modular adjustable structure is adaptable to various contactor models, taking into account both comprehensive testing and scenario adaptability. It systematically overcomes the defects of traditional manual testing, such as low efficiency, poor accuracy, insufficient coverage, and safety hazards, and provides a highly reliable and integrated technical solution for intelligent operation and maintenance of power distribution equipment. Therefore, it has a very broad application prospect. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall device structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the square groove structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation structure of the first support platform and the first foot seat of the present invention.

[0023] Figure 4 This is a schematic diagram of the first connecting seat and the stabilizing plate installation structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the guide belt installation structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the mounting structure of the third and fourth pulleys of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the liquid inlet chamber of the present invention;

[0027] Figure 8 This is a schematic diagram of the first support structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the reference frame mounting structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the three-phase terminal block installation structure of the present invention;

[0030] Figure 11 This is a schematic diagram of the extension frame mounting structure of the present invention;

[0031] Figure 12 This is a schematic diagram of the probe post mounting structure of the present invention;

[0032] In the diagram: 1. Workbench, 2. First support platform, 3. Second support platform, 4. First support base, 5. Clamping block, 6. Reference frame, 7. Second support base, 8. Receiving plate, 9. Three-phase terminal block, 10. Extension plate, 11. Extension frame, 12. Support, 13. Probe post, 14. Square slot, 15. First foot, 16. First linear cylinder, 17. First connecting seat, 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 belt, 28. Mounting slot, 29. Second connecting seat 30. Long rod bolt, 31. Third pulley, 32. Crossbar, 33. Strip groove, 34. Fourth pulley, 35. Boss, 36. Groove, 37. Stabilizing platform, 38. First electromagnetic slide rail, 39. Second motor, 40. First slide table, 41. First guide rail, 42. First slider, 43. Second linear cylinder, 44. Third connecting seat, 45. Right-angle bracket, 46. Second electromagnetic slide rail, 47. Third motor, 48. Second slide table, 49. Fourth connecting seat, 50. Second guide rail, 51. Second slider, 52. Third electromagnetic slide rail, 53. Third slide table, 54. Electric telescopic rod, 55. Cross plate, 56. Right-angle block. Detailed Implementation

[0033] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] This specific embodiment provides a contactor contact resistance detection device for power distribution equipment, such as... Figures 1-12 As shown, the device includes a workbench 1, which consists of a frame beam and a flat top plate. The bottom of the frame beam is provided with multiple support feet. The bottom of the support feet is made of rubber material, which can improve the stability of the overall device and facilitate the fixing of the overall device in the resistance detection work area.

[0035] The workbench 1 has two through square slots 14, which are symmetrically arranged on the top plate of the workbench 1. Each square slot 14 is provided with a foot 15, and the two feet 15 are respectively clearance-fitted into the two square slots 14. The top of each foot 15 is fixedly connected to a first support platform 2. The inner side of the two square slots 14 is provided with a mounting groove, in which a first linear cylinder 16 is fastened and connected, thereby fastening 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. A first connecting seat 17 is fixedly installed at the end of the piston rod of the first linear cylinder 16. The first connecting seat 17 can be adjusted in position along the Z-axis direction along with 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. The two stabilizing plates 18 are respectively fastened to the top of the two feet 15, so that the first linear cylinder 16 can directly drive the feet 15 to move along the Z-axis direction in the square groove 14, thereby adjusting the arrangement height of the first support platform 2.

[0036] Two symmetrically arranged second support platforms 3 are provided on both sides of the first support platform 2. Both second support platforms 3 are fastened to the worktable 1 via a base, and their heights are aligned along the Z-axis. Multiple first pulleys 19 are rotatably mounted on the inner sides of both the first support platform 2 and the second support platform 3. A guide belt 20 is wound around the first pulleys 19 on the same side of both platforms. Therefore, two symmetrically arranged guide belts 20 are provided inside both the first support platform 2 and the second support platform 3. These guide belts 20 are used to linearly transport the first support seat 4 along the Y-axis, allowing the first support seat 4 to pass sequentially through the second support platform 3 on the left, the first support platform 2, and the second support platform 3 on the right. 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 describe the structure within the first support platform 2 in detail.

[0037] Symmetrically arranged lifting plates 21 are fixedly installed on both sides of the first support platform 2. A rotating rod 22 is rotatably installed between the two lifting plates 21 on both sides of the first support platform 2. The rotating rod 22 is rotatably engaged with the two lifting plates 21 through a bearing sleeve. Two second pulleys 23 are fixedly fitted around the outer periphery of the rotating rod 22, and the two second pulleys 23 are respectively close to the two lifting plates 21 at both ends of the rotating rod 22. 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 lifting plate 21 on the outer side of the first support platform 2. A first rotating wheel 25 and a second rotating wheel 26 are provided on the outer side of the lifting plate 21. The first rotating wheel 25 is fastened to the outer wall of the output shaft of the first motor 24, and the second rotating wheel 26 is fastened to the outer wall of the rotating rod 22. The first rotating wheel 25 and the second rotating wheel 26 are connected by a rotating belt 27, thereby driving the rotating rod 22 to rotate between the two lifting plates 21 by the first motor 24.

[0038] The first support platform 2 has mounting grooves 28 on its inner side, which are located below the first pulley 19. Two long bolts 30 are fixedly installed in each mounting groove 28, symmetrically arranged inside the first pulley 19. A third pulley 31 is rotatably fitted around each long bolt 30. Two crossbars 32 are fixedly installed on the inner side of the lifting plate 21, symmetrically distributed on both sides of the bottom of the rotating rod 22. A fourth pulley 34 is rotatably fitted around each crossbar 32. The third pulley 31 contacts the outer circumferential surface of the guide belt 20, and the fourth pulley 34 contacts the inner circumferential surface of the guide belt 20. By adjusting the installation position of the long bolts 30 in the mounting grooves 28, the tension of the guide belt 20 can be flexibly adjusted to stably support the first support base 4.

[0039] The first support platform 2 has protrusions 35 on its inner side, and the first support base 4 has Z-shaped corner structures on both sides, with grooves 36 at the bottom corners of its outer edges. The guide belt 20 is arranged between the protrusions 35 and the grooves 36, thereby facilitating the stable transport of the first support base 4 within the first support platform 2. Furthermore, a stabilizing platform 37 is provided on the inner side of the first support platform 2, positioned below it. The stabilizing platform 37 is securely connected to the worktable 1, providing an emergency support structure for the first support base 4 and ensuring its support capacity.

[0040] The first support base 4 is equipped with three locking blocks 5, one on one side and two on the other. This triangular arrangement of the three locking blocks 5 facilitates clamping the contactor. The first support base 4 also has multiple circular holes, which allow for secure connection between the contactor and the first support base 4, forming a single integrated structure and further enhancing the tightness of the connection between the contactor and the first support base 4.

[0041] A first electromagnetic slide rail 38 is fixedly installed on the workbench 1. The first electromagnetic slide rail 38 is arranged along the Y-axis and is located on the side of the first support platform 2. A second motor 39 is provided on the side of the first electromagnetic slide rail 38. The second motor 39 is fastened to the workbench 1 through a motor support. The output shaft of the second motor 39 is drivenly connected to the input shaft of the first electromagnetic slide rail 38, thereby providing driving force to the first electromagnetic slide rail 38. A first slide table 40 is slidably installed on the first electromagnetic slide rail 38. The first slide table 40 is fastened to the reference frame 6 through a second connecting seat 29. The reference frame 6 is arranged above the workbench 1. Two first guide rails 41 are fixedly installed on the workbench 1 along the Y-axis. Both first guide rails 41 are arranged between the first electromagnetic slide rail 38 and the first support platform 4. Two first sliders 42 are slidably installed on each first guide rail 41. The four first sliders 42 are fastened together to the bottom end of the reference frame 6, thereby allowing the reference frame 6 to move along the Y-axis under the drive of the first electromagnetic slide rail 38.

[0042] A second support base 7 is fixedly installed inside the reference frame 6. A second linear cylinder 43 is fixedly installed on the second support base 7. The piston rod of the second linear cylinder 43 is arranged along the X-axis and its end faces the first support base 4. A third connecting seat 44 is fixedly installed at the end of the piston rod of the second linear cylinder 43. The third connecting seat 44 is fastened to the receiving plate 8, thereby causing the receiving plate 8 to move along the X-axis. A three-phase terminal 9 is fixedly installed 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 is in contact with the coil of the contactor, thereby electrically connecting it to the contactor and continuously supplying power to the contactor.

[0043] 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 by two right-angle brackets 45. A second electromagnetic slide rail 46 is mounted 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 fixedly mounted on the side of the second electromagnetic slide rail 46 by 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 table 48 is slidably mounted on the second electromagnetic slide rail 46. A fourth connecting seat 49 is fastened to the second slide table 48. A second guide rail 50 arranged along the Y-axis is provided 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. The fourth connecting seat 49 moves along the Y-axis under the driving action of the second electromagnetic slide rail 46. A third electromagnetic slide rail 52 arranged along the Z-axis is fixedly mounted on the top of the fourth connecting seat 49. A third slide table 53 is slidably mounted on the third electromagnetic slide rail 52. An extension frame 11 is fixedly connected to the third slide table 53. The extension frame 11 moves along the Z-axis under the driving action of the third electromagnetic slide rail 52.

[0044] Two symmetrically arranged supports 12 are fixedly installed on both sides of the extension frame 11. Three electric telescopic rods 54 are fixedly installed in each support 12. The electric telescopic rods 54 are arranged along the Z-axis with their travel rods facing downwards. A probe post 13 is fixedly installed at the bottom end of the travel rod of each electric telescopic rod 54, with each electric telescopic rod 54 corresponding to a probe post 13. The three probe posts 13 on each side can be connected to a resistance tester via wires. Each probe post 13 can extend into the contactor's contact groove to detect the resistance value of each contact.

[0045] In addition, 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 all made of insulating rubber material to prevent damage to the detection device due to the contactor being energized. Each right-angle block 56 is provided with a strip groove 33, and the probe post 13 is arranged inside the strip groove 33 to enhance the installation stability of the probe post 13.

[0046] The working principle of this invention is as follows:

[0047] Before the contactor contact resistance test, the contactor to be tested can be fixedly installed on the first support base 4 and stably loaded using the clamping block 5. The first support base 4, with the contactor loaded, is placed on the second support platform 3 on the left. By starting the first motor 24 inside the second support platform 3, the guide belt 20 inside the second support platform 3 transports the first support base 4 along the Y-axis and into the first support platform 2. Once the first support base 4 is stably positioned inside the first support platform 2, the position of the reference frame 6 is adjusted appropriately by the action of the first electromagnetic slide rail 38. The first linear cylinder 16 raises the first support platform 2 along the Z-axis, and the second linear cylinder 43 continuously supplies power to the contactor through the three-phase terminals 9, thus keeping the contactor continuously energized. Under the adjustment of the second electromagnetic slide rail 46, the arrangement position of the fourth connecting seat 49 along the Y-axis is appropriately adjusted, and the arrangement position of the extension frame 11 along the Z-axis is adjusted by the third electromagnetic slide rail 52, so that the three probe posts 13 in the support 12 extend into the contact inner groove of the contactor, and the resistance detection value is displayed on the resistance tester, thus facilitating the tester to obtain the resistance detection status in real time. After the resistance detection operation is completed, the power supply to the contactor is disconnected, and the first linear cylinder 16 is used to adjust the first support seat 4 to be level with the height of the second support platforms 3 on both sides, thereby transporting the first support seat 4 into the second support platform 3 on the right side, so that the tester can remove the testing device.

[0048] Compared with existing technologies, the contactor contact resistance detection device designed in this invention has significant advantages over manual detection:

[0049] By employing a multi-axis linear conveying system (support platform, reference frame) and a clamping structure, rapid positioning and continuous batch testing of contactors are achieved, eliminating the need for frequent power outages and disassembly, significantly shortening the testing cycle. Continuous power supply to the three-phase terminals simulates the actual energized state of the contactor. Combined with the automatic insertion of probes into the contact grooves and the application of stable pressure, the contactor penetrates the oxide layer to obtain accurate dynamic resistance values, avoiding errors caused by uneven manual contact or environmental interference. Symmetrically arranged multi-probes simultaneously test the main and auxiliary contacts, and the bypass design of the arc-extinguishing device ensures full contact coverage. Mechanical operation isolates direct manual contact with live parts, reducing the risk of electric shock and arcing. The resistance tester is directly linked to the probes, recording and analyzing data in real time, eliminating subjective biases from manual recording, supporting early warning of degradation trends, and improving fault prediction capabilities. Modular support bases and adjustable extension frames adapt to different contactor models, expanding testing scenarios. In summary, this invention has very broad application prospects.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A contactor contact resistance detection device for power distribution equipment, comprising a workbench (1), characterized in that, The workbench (1) is provided with a first support platform (2) that moves vertically along the Z-axis. 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. Both second support platforms (3) are fastened to the workbench (1). The first support platform (2) and the second support platform (3) are used to linearly transport the first support seat (4) along the Y-axis. The first support seat (4) is equipped with multiple clamping blocks (5), which are used to fix the clamping contactor. The workbench (1) is provided with a reference frame (6) that moves along the Y-axis. A second support seat (7) is fixedly installed inside the reference frame (6). A support plate (8) that moves along the X-axis is provided on the support (7). A three-phase terminal block (9) is fixedly installed on the support plate (8). The three-phase terminal block (9) is connected to an external power supply device and electrically connected to the coil of the contactor, thereby continuously supplying power to the contactor. An extension plate (10) is fixedly installed on the side of the reference frame (6). An extension frame (11) that moves along the Y-axis and Z-axis is provided on the extension plate (10). Two symmetrically arranged supports (12) are fixedly installed on both sides of the extension frame (11). Three probe posts (13) are provided in each support (12). Each probe post (13) is connected to a resistance tester. The probe post (13) extends into the contact groove of the contactor and detects the resistance value of each contact. The extension plate (10) is fastened to the reference frame (6) via a right-angle bracket (45). A second electromagnetic slide rail (46) is mounted on the extension plate (10). The second electromagnetic slide rail (46) is arranged along the Y-axis. A third motor (47) is provided on the side of the second electromagnetic slide rail (46). The third motor (47) is used to provide driving force to the second electromagnetic slide rail (46). A second slide table (48) is slidably mounted on the second electromagnetic slide rail (46). A fourth connecting seat (49) is fastened to the second slide table (46). 6) is provided with a second guide rail (50) arranged along the Y-axis. The second guide rail (50) is arranged on the side of the second electromagnetic slide rail (46). A second slider (51) is slidably installed on the second guide rail (50). The second slider (51) is tightly connected to the bottom end of the fourth connecting seat (49). A third electromagnetic slide rail (52) arranged along the Z-axis is fixedly installed on the top end of the fourth connecting seat (49). A third slide table (53) is slidably installed on the third electromagnetic slide rail (52). The third slide table (53) is tightly connected to the extension frame (11).

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

3. The contact contact resistance detection device for power distribution equipment according to claim 1, characterized in that, Multiple first pulleys (19) are rotatably mounted on the inner side of the first support platform (2) and the second support platform (3). The first pulleys (19) on the same side are wrapped with a guide belt (20). The first support seat (4) is in contact with the outer peripheral surface of the guide belt (20). The first support platform (2) and the second support platform (3) are fixedly mounted with symmetrically arranged lifting plates (21) on both sides. A rotating rod (22) is rotatably mounted between the two lifting plates (21) on both sides of the first support platform (2) and the second support platform (3). The outer periphery of the rotating rod (22) is fixedly sleeved. The device is equipped with multiple second pulleys (23), which are in contact with the outer circumferential surface of the guide belt (20). A first motor (24) is fixedly installed on the inner side of the lifting plate (21), and a first rotating wheel (25) and a second rotating wheel (26) are provided on the outer side of the lifting plate (21). The first rotating wheel (25) is fastened to the outer wall of the output shaft of the first motor (24), and the second rotating wheel (26) is fastened to the outer wall of the rotating rod (22). The first rotating wheel (25) and the second rotating wheel (26) are connected by a rotating belt (27).

4. The contact contact resistance detection device for power distribution equipment according to claim 3, characterized in that, The first support platform (2) and the second support platform (3) are provided with mounting grooves (28) on their inner sides. The mounting grooves (28) are arranged below the first pulley (19). A long rod bolt (30) is fixedly installed in the mounting groove (28). A third pulley (31) is rotatably fitted around the long rod bolt (30). Multiple crossbars (32) are fixedly installed on the inner side of the lifting plate (21). The crossbars (32) are arranged at the bottom of the rotating rod (22) and are symmetrically distributed. A fourth pulley (34) is rotatably fitted around the outer side of each crossbar (32). The third pulley (31) is in contact with the outer circumferential surface of the guide belt (20), and the fourth pulley (34) is in contact with the inner circumferential surface of the guide belt (20).

5. A contactor contact resistance detection device for 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 provided with protrusions (35), and the bottom corners of the two sides of the first support base (4) are provided with grooves (36). The guide belt (20) is arranged between the protrusions (35) and the grooves (36). The inner side of the first support platform (2) is provided with a stabilizing platform (37), which is arranged below the first support platform (2). The stabilizing platform (37) is tightly connected to the worktable (1).

6. The contact contact resistance detection device for power distribution equipment according to claim 1, characterized in that, A first electromagnetic slide rail (38) is fixedly installed on the workbench (1). The first electromagnetic slide rail (38) is arranged along the Y-axis. 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 installed on the first electromagnetic slide rail (38). 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 installed on the workbench (1) and is arranged along the Y-axis. The first guide rail (41) is arranged on the side of the first electromagnetic slide rail (38). A first slider (42) is slidably installed on the first guide rail (41). The first slider (42) is fastened to the bottom end of the reference frame (6).

7. The contact contact resistance detection device for power distribution equipment according to claim 1, characterized in that, A second linear cylinder (43) is fixedly installed on the second support (7). The piston rod of the second linear cylinder (43) is arranged along the X-axis and its end faces the first support (4). A third connecting seat (44) is fixedly installed at the end of the piston rod of the second linear cylinder (43). The third connecting seat (44) is tightly connected to the receiving plate (8).

8. A contactor contact resistance detection device for power distribution equipment according to claim 1, characterized in that, Three electric telescopic rods (54) are fixedly installed inside the support (12). The electric telescopic rods (54) correspond one-to-one with the probe column (13). The electric telescopic rods (54) are arranged along the Z-axis and the stroke rods are set downwards. The top of the probe column (13) is tightly connected to the stroke rod of the electric telescopic rod (54).

9. A contactor contact resistance detection device for 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). 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 blocks (56). The probe column (13) is arranged inside the strip groove (33).

Images