A resistance detection docking device for open circuit breaker

Abstract

The present invention relates to the technical field of circuit breaker detection, specifically to an open circuit breaker resistance detection docking device, including a mounting member, a bearing seat, an adapter plate, a buffer spring support, a docking block, a guide plate, a first spring, a product terminal board and an actuator, one end of the mounting member is connected to the actuator, and the other end is rotatably connected to the inner hole of the bearing seat, and the bottom of the bearing seat is fixed to the adapter plate; the bottom of the adapter plate is connected to the upper surface of the guide plate through a buffer spring support; the docking block is slidably arranged in the through hole of the guide plate through a first spring; the docking block is connected to an external test line; during detection, the bottom of the docking block contacts the docking surface on the product terminal board. The present invention realizes the requirements for accurate positioning and stable contact during loop resistance testing through a rotating pair connection and a two-stage spring buffer structure arranged on the device body.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker detection, in particular to an open circuit breaker resistance detection docking device. Background Art

[0002] Loop resistance refers to the total resistance of all contacts and conductors inside the circuit breaker under normal working conditions. Generally, the four-terminal measurement technology is used to test the circuit breaker loop resistance. The current is 100A, and the voltage test line and the current test line are connected at both ends of the product under test. The loop resistance tester includes two wire clamps. In the prior art, the circuit breaker is provided with a terminal block on the dynamic side and the static side. When measuring the circuit breaker loop resistance, the staff clamps the two wire clamps on the test terminal blocks on the dynamic side and the static side of the circuit breaker.

[0003] An open circuit breaker is an electrical device used to cut off the circuit with air as the insulating medium to the ground. It has the function of protecting the circuit and equipment. It can be a porcelain column type or a tank type, with a porcelain sleeve as the equipment shell and external insulation. Its characteristics are large external insulation distance and large footprint. When measuring the loop resistance of an open circuit breaker, it is necessary to connect the test end of the loop resistance meter to the product test point. Since the loaded current is at least 100A, if the contact is unstable, heating will occur. Therefore, it is necessary to ensure that a certain contact area must be ensured when the current end and the voltage end are connected to the product test point respectively, and the contact must be stable.

[0004] Typical testing methods in the high-voltage switch industry are: Method 1: Manually bundle the test wire on the terminal board or clamp it on the terminal board. For docking points at high places of the product, manual docking is completed with the help of a climbing vehicle. After completing the loop resistance test, manual work needs to be done to disassemble the test wire. Method 2: Manual work does not require climbing, and a long pole with docking claws is used to complete the docking between the test wire and the product terminal board, such as the dual-channel split-type high-altitude test clamp disclosed in patent number CN102818932A. For some circuit breaker products with large production, when testing the loop resistance, a fixed-point mechanical clamping contact method can be used to complete the automatic docking work. Rigid contact will damage the outer surface of the product terminal board, and it is not suitable for testing occasions where the product docking point position deviation is large and the positioning repeatability is low. For tall circuit breaker products, manual resistance measurement can be used.

[0005] An automated device that is compatible with automatic resistance testing of a variety of open-type circuit breaker products, after the robot or truss manipulator completes the docking with the product terminal board with the docking device, the automated equipment system communicates with the loop resistance tester, the loop resistance tester measures the loop resistance value of the product, and uploads the loop resistance value result to the control system, and compares it with the set resistance threshold. If the resistance value requirement is met, the test is prompted to pass. If the resistance value requirement is not met, the test is prompted to fail, and the staff will investigate and handle the assembly problem.

[0006] When using an automated docking device, the following problems will be encountered: (1) The circuit breaker product itself is tall, and the position of the top terminal block will not be fixed. The corresponding terminal block position will change after each product reaches the test position. Therefore, the docking device should be able to adapt to a wide range of docking requirements. A visual guidance solution can be used to accurately position the docking device and the product, but it is expensive and has poor economic performance. (2) Automated equipment (such as robots) drives the movement of each joint axis with the target point coordinates to fit the docking device to the terminal block. If a rigid docking device is used, there is a risk of damaging the surface of the product terminal block and the driving structure of the docking device. Therefore, the docking device needs to avoid using rigid contact and use flexible contact to ensure that the surface of the terminal block is not damaged. (3) When testing the loop resistance, a stable contact area that meets the docking requirements is required. If the automatic docking device lacks the function of actively adjusting the docking angle, the corners of the docking block may be docked with the terminal block, which does not meet the wiring area requirements. In addition, the small wiring area will generate heat during the test, causing adverse effects.

[0007] For manual docking, the test point docking is completed by manual visual inspection, and the test personnel must participate in the process. Manually holding a long pole for docking measurement is laborious and inefficient. For automatic docking, if the product has good enough repetition accuracy, the automatic docking equipment can accurately locate it every time. If the product is tall and the installation accumulation error is large, the position repetition accuracy of the terminal blocks of different products is poor, resulting in deviations between the terminal blocks and the test docking surface. Accurate docking can be completed by taking pictures and visual guidance, but the price is expensive and the economy is poor. Summary of the invention

[0008] In view of the problem in the prior art that large products have deviations during resistance detection docking due to large accumulated installation errors, the present invention provides an open circuit breaker resistance detection docking device, which can adaptively correct the angular deviation between the docking device and the product terminal board, and provide a clamping force during resistance testing to meet the test requirements of stable contact.

[0009] The present invention is achieved through the following technical solutions: An open circuit breaker resistance detection docking device comprises a mounting piece, a bearing seat, an adapter plate, a buffer spring support, a docking block, a guide plate, a first spring, a product terminal board and an actuator, wherein one end of the mounting piece is connected to the actuator, and the other end is rotatably connected to the inner hole of the bearing seat, and the bottom of the bearing seat is fixed to the adapter plate; the bottom of the adapter plate is connected to the upper surface of the guide plate through the buffer spring support; the docking block is slidably arranged in the through hole of the guide plate through the first spring; the docking block is connected to an external test line; during detection, the bottom of the docking block contacts the docking surface on the product terminal board.

[0010] Preferably, the projection of the rotation axis of the mounting member on the plane of the guide plate is located on the symmetry plane of the guide plate.

[0011] Preferably, the distance between the plane of the guide plate and the axis of the rotating shaft is smaller than the maximum contact distance between the guide plate and the product terminal board.

[0012] Preferably, four buffer spring supports are provided and are respectively located at the four corners of the adapter plate; the buffer spring support includes a shaft retaining ring, a second spring and a limiting rod, the upper end of the limiting rod cooperates with the shaft retaining ring to be fixedly connected to the adapter plate, and the lower end cooperates with the shaft retaining ring to be fixedly connected to the guide plate, the second spring is sleeved on the limiting rod, and the upper end of the second spring abuts against the adapter plate, and the lower end abuts against the guide plate.

[0013] Preferably, a protrusion structure is provided around one end of the docking block close to the spring, and the cross-sectional area of ​​the protrusion structure is larger than the cross-sectional area of ​​the through hole.

[0014] Preferably, one end of the first spring contacts the lower end surface, and the other end is embedded in the docking block for fixation.

[0015] Preferably, the external test line includes a voltage test line and a current test line, and two docking blocks are provided, and the tops of the two docking blocks are respectively connected to the voltage test line and the current test line through wiring screws.

[0016] Preferably, a small angle adjustment is allowed between the mounting member and the adapter plate, and a flexible connection can be used.

[0017] Preferably, the product terminal board is a flat structure.

[0018] Preferably, the docking block is made of metal, and the guide plate is made of non-metallic material.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses an open-type circuit breaker resistance detection docking device, which is installed at the end of an automatic actuator and realizes adaptive leveling of the docking plane and the product terminal board by a rotating connection method. The requirements for accurate positioning and stable contact during loop resistance testing are realized by a rotating pair connection and a two-stage spring buffer structure arranged on the device body, which reduces the position accuracy requirements of the terminal board after the product reaches the test position, and has good product compatibility and economy. During detection, when the docking device approaches the product terminal board, the guide plate first contacts the product terminal board, and the guide plate can adaptively rotate around the bearing seat under the action of the contact force to compensate for the small angle deviation between the guide plate and the terminal board until the two fit together. The buffer spring support arranged between the adapter plate and the guide plate compresses the force generated by the buffer spring support to make the docking plane of the guide plate fit on the surface of the product terminal board. At this time, the contact surfaces of the voltage docking block and the current docking block have been adjusted to a posture parallel to the product terminal board. The adapter plate drives the first spring to press the docking block toward the surface of the product terminal board. The docking block is embedded in the hole of the guide plate and slides to ensure that the contact surface of the docking block is always parallel to the surface of the product terminal board until the docking block fits with the product terminal board. At this time, the first spring between the adapter plate and the docking block is compressed, so that the docking block is in stable contact with the product terminal board to meet the test requirements.

[0020] Furthermore, a buffer spring support is provided between the adapter plate and the guide plate, and a second spring and a limit rod structure are used to avoid rigid contact, thereby protecting the surface of the product terminal board.

[0021] Furthermore, the docking block embedded in the guide plate can limit the sliding posture. After the guide plate is docked with the product terminal board, it is equivalent to constraining the docking posture of the docking block in advance, so that the docking block can contact with a preset maximum area, thereby improving the test stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the resistance detection docking device of an open circuit breaker of the present invention.

[0023] In the figure, 1. Mounting parts; 2. Bearing seat; 3. Adapter plate; 4. Buffer spring support; 5. Docking block; 6. Guide plate; 7. Voltage test line; 8. Current test line; 9. First spring; 10. Product terminal board; 11. Actuator. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0025] The present invention discloses an open circuit breaker resistance detection docking device, referring to Figure 1, including a mounting part 1, a bearing seat 2, an adapter plate 3, a buffer spring support 4, a docking block 5, a guide plate 6, a first spring 9, a product terminal board 10 and an actuator 11, one end of the mounting part 1 is connected to the actuator 11, and the other end is rotatably connected to the inner hole of the bearing seat 2, and the bottom of the bearing seat 2 is fixed on the adapter plate 3; the projection of the rotation axis of the mounting part 1 on the plane of the guide plate 6 is located on the symmetric plane of the guide plate 6, and the distance between the plane of the guide plate 6 and the axis of the rotating shaft is less than the maximum contact distance between the guide plate 6 and the product terminal board 10. In this embodiment, the bearing seat 2 is a part connecting the mounting part 1 and the adapter plate 3, the inner ring of which is connected to the shaft of the mounting part 1 by a shaft hole, and the outer ring is installed on the seat body itself, and the seat body is connected to the adapter plate 3 by bolts.

[0026] In another embodiment, a flexible connection (such as a ball joint structure) is used between the mounting member 1 and the adapter plate 3, that is, an angle adjustment is allowed between the mounting member 1 and the adapter plate 3, so that when the guide plate 6 is docked with the terminal board 10, the flexible connection here can be used to achieve the bonding process between the guide plate 6 and the terminal board 10.

[0027] The bottom of the adapter plate 3 is connected to the upper surface of the guide plate 6 through the buffer spring support 4; specifically, four buffer spring supports 4 are provided, and are respectively located at the four corners of the adapter plate 3; the buffer spring support 4 includes a shaft retaining ring, a second spring and a limit rod, the upper end of the limit rod cooperates with the shaft retaining ring to be fixedly connected to the adapter plate 3, and the lower end cooperates with the shaft retaining ring to be fixedly connected to the guide plate 6, the second spring is sleeved on the limit rod, and the upper end of the second spring abuts against the adapter plate 3, and the lower end abuts against the guide plate 6. Specifically, the top of the limit rod extends into the holes at the four corners of the adapter plate 3, and there is a groove on the outer circumferential surface of the top of the limit rod, which is used in conjunction with the shaft retaining ring to limit the distance between the limit rod and the adapter plate. The spring is sleeved outside the limit rod, between the adapter plate 3 and the guide plate 6. The lower part of the limit rod is provided with an external thread for screwing into the threaded hole provided on the guide plate 6. A gas spring or other connection method may be used between the adapter plate 3 and the guide plate 6 to provide elastic force between the adapter plate 3 and the guide plate 6 .

[0028] The docking block 5 is slidably arranged in the through hole of the guide plate 6 through the first spring 9; specifically, one end of the first spring 9 contacts the lower end surface, and the other end is embedded in the docking block 5 for fixing. The docking block 5 is embedded in the guide plate 6 and can slide in a limited posture. After the guide plate 6 is docked with the product terminal board 10, it is equivalent to constraining the docking posture of the docking block 5 in advance, so that the docking block 5 can contact with a preset maximum area, thereby improving the test stability.

[0029] The docking block 5 is connected to the external test, and the external test line includes a voltage test line 7 and a current test line 8. Two docking blocks 5 are provided, and the tops of the two docking blocks 5 are respectively connected to the voltage test line 7 and the current test line 8 through wiring screws.

[0030] A protrusion structure is arranged around one end of the docking block 5 close to the spring, and the cross-sectional area of ​​the protrusion structure is larger than the cross-sectional area of ​​the through hole, so that the protrusion structure cannot pass through the guide plate 6, thereby limiting the maximum sliding distance of the docking block 5 in the guide plate 6.

[0031] The guide plate 6 is made of non-metal material, and a threaded hole is provided on its upper surface, which is fixedly connected to the limit rod in the buffer spring support 4.

[0032] The docking block 5 is made of metal, the product terminal board 10 is a flat structure, and the upper surface of the product terminal board 10 includes a docking surface and a horizontal surface, and the docking surface and the horizontal surface are arranged non-parallel.

[0033] During the test, the bottom of the docking block 5 contacts the docking surface on the product terminal board 10. When the docking device is docked with the product terminal board 10, the docking surface of the product terminal board 10 has a certain angle deviation from the horizontal plane. This deviation is caused by the cumulative error after the open circuit breaker product is assembled. Therefore, there is also a certain angle between the contact plane of the product terminal board 10 and the docking block 5.

[0034] The device disclosed in the present invention can complete the adaptive adjustment of the small range deviation angle. When the mounting part 1, the bearing seat 2 and the adapter plate 3 move toward the product terminal board 10 together, the part of the guide plate 6 first contacts the part of the product terminal board 10. The product terminal board 10 applies a force around the axis of the bearing seat 2. The guide plate 6 rotates under the action of this force and fits with the plane of the product terminal board 10. The docking block 5 and the guide plate 6 complete the adjustment of the docking posture together. Then the adapter plate 3 continues to approach the terminal board product terminal board 10, and the spring between the guide plate 6 and the adapter plate 3 begins to compress. The elastic force can ensure that the guide plate 6 fits with the docking surface of the terminal board product terminal board 10 throughout the process. Because the effective sliding height of the docking block 5 exceeds the thickness of the guide plate 6, when the lower surface of the docking block 5 contacts the product terminal board 10, the first spring 9 on the docking block 5 begins to be compressed. At this time, the adapter plate 3 continues to approach the product terminal board 10. The docking block 5 is tightly attached to the surface of the product terminal board 10 under the action of the elastic force generated by the deformation of the spring, meeting the loop resistance test requirements.

[0035] The open circuit breaker resistance detection docking device of the present invention realizes efficient and stable docking with the product terminal board 10 through the adjustment and buffering of two elastic parts, thereby ensuring the accuracy and reliability of resistance detection.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. An open circuit breaker resistance detection docking device, characterized in that: The invention comprises a mounting member (1), a bearing seat (2), an adapter plate (3), a buffer spring support (4), a docking block (5), a guide plate (6), a first spring (9), a product terminal board (10) and an actuator (11); one end of the mounting member (1) is connected to the actuator (11), and the other end is rotatably connected to the inner hole of the bearing seat (2); the bottom of the bearing seat (2) is fixed on the adapter plate (3); the bottom of the adapter plate (3) is connected to the upper surface of the guide plate (6) through the buffer spring support (4); the docking block (5) is slidably arranged in the through hole of the guide plate (6) through the first spring (9); the docking block (5) is connected to an external test line; during detection, the bottom of the docking block (5) contacts the docking surface on the product terminal board (10).

2. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: The projection of the rotation axis of the mounting member (1) on the plane of the guide plate (6) is located on the symmetry plane of the guide plate (6).

3. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: The distance between the plane of the guide plate (6) and the axis of the rotating shaft is smaller than the maximum value of the contact distance between the guide plate (6) and the product terminal board (10).

4. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: Four buffer spring supports (4) are provided and are respectively located at the four corners of the adapter plate (3); the buffer spring support (4) comprises a shaft retaining ring, a second spring and a limiting rod; the upper end of the limiting rod cooperates with the shaft retaining ring to be fixedly connected to the adapter plate (3), and the lower end cooperates with the shaft retaining ring to be fixedly connected to the guide plate (6); the second spring is sleeved on the limiting rod, and the upper end of the second spring abuts against the adapter plate (3), and the lower end abuts against the guide plate (6).

5. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: A protruding structure is arranged around one end of the docking block (5) close to the spring, and the cross-sectional area of ​​the protruding structure is larger than the cross-sectional area of ​​the through hole.

6. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: One end of the first spring (9) contacts the lower end surface, and the other end is embedded in the docking block (5) for fixation.

7. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: The external test line comprises a voltage test line (7) and a current test line (8), two docking blocks (5) are provided, and the tops of the two docking blocks (5) are respectively connected to the voltage test line (7) and the current test line (8) via connection screws.

8. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: A flexible connection is used between the mounting member (1) and the adapter plate (3).

9. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: The product terminal board (10) is a flat structure.

10. The open circuit breaker resistance detection docking device according to claim 1, characterized in that: The docking block (5) is made of metal, and the guide plate (6) is made of non-metallic material.

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