Large-current test detection platform

Abstract

The utility model discloses a large current test detection bench, which relates to the technical field of circuit breaker detection equipment and comprises a clamp assembly composed of a bottom plate, a vertical plate and an electrode assembly. The electrode assembly comprises a conducting bar parallel to a wiring board, a guide rail air cylinder opposite movement device which is limited by a hydraulic buffer and is perpendicular to the wiring board, and an upper end floating clamping opening and a lower end floating clamping opening which are parallel to the wiring board, and the end floating clamping openings are connected with the wiring board of the circuit breaker to be tested through floating contacts of a multi-piece warping plate structure. The problems that in the prior art, stroke fixing compatibility is poor, a product is prone to being damaged during clamping, and horizontal crimping cannot be guaranteed are solved, and the beneficial effects that testing compatibility and safety are improved, and the appearance damage degree caused in the testing process of the product to be tested is reduced are achieved.

Description

Technical Field

[0001] This application relates to the technical field of circuit breaker testing equipment, specifically a high-current test bench. Background Technology

[0002] As frame circuit breaker products continue to be innovated, the fixtures of existing testing equipment can only test some products, and cannot test others. Therefore, they can no longer meet the compatibility requirements. In addition, they are too large, have fixed stroke, and are complicated to operate, which makes them unable to meet the requirements of large-scale testing. Furthermore, the crimping joint is a hard connection, and the conductive busbar cannot be guaranteed to be parallel and horizontally crimped during clamping, often resulting in line contact. This leads to poor conductivity, sparking, and easy surface scratches, product damage, and indentations. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a high-current testing station to solve the problems of poor stroke fixation compatibility, easy product damage during clamping, and inability to guarantee horizontal crimping in the aforementioned existing technologies.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A high-current test bench includes a clamp assembly. The clamp assembly is provided with contacts that connect to the terminal block of a circuit breaker under test. The clamp assembly includes a base plate, a vertical plate, and electrode assemblies. The vertical plate is fixed to the center of the base plate by a triangular bracket on its edge. Electrode assemblies are installed on the vertical plate corresponding to the positions of the terminal blocks. Each electrode assembly includes a conductive bar parallel to the terminal block, a reciprocating motion device perpendicular to the terminal block including a reciprocating motion limiting device, and two floating end clamps parallel to the terminal block. Both the upper and lower floating end clamps are provided with... On one side of the upright plate, there are more than one regularly arranged contact that is parallel to the surface of the terminal block and perpendicular to the extension direction of the terminal block. The contact is a floating contact adapted to the terminal block. The upper and lower floating clamps clamp the terminal block from both sides under the control of the opposing motion device. When clamped, the surface of the floating contact is in contact with the upper and lower surfaces of the terminal block. The upper and lower floating clamps are electrically connected to the conductive busbar through the connection part. The conductive busbar is fixed on the opposing motion device and extends to the other side of the upright plate through the clearance hole and is connected to the power supply.

[0006] Preferably, the opposing motion device includes linear guides, sliders, cylinders, horizontal fixing plates, and vertical fixing plates. More than one linear guide is vertically and parallelly mounted on the upright plate. The horizontal fixing plate includes two parts, one connected to the upper end floating clamp and the other to the lower end floating clamp, respectively. Each horizontal fixing plate has the same number of vertical fixing plates as the linear guides fixed near its end on the upright plate. Each vertical fixing plate is fixed to the linear guide by its respective slider. A cylinder, the same number as the linear guides, is fixed on the upper part of the horizontal fixing plate. The piston rod of the cylinder passes through the upper horizontal fixing plate and connects to the lower horizontal fixing plate. The portion of the conductive busbar on the same side of the upright plate as the horizontal fixing plate is fixed to the horizontal fixing plate facing the clamped terminal block. The opposing motion limiting device uses a vertically mounted hydraulic buffer, which limits the vertical position of the horizontal fixing plate.

[0007] Preferably, each of the aforementioned floating clamps includes a cylindrical helical compression spring, a positioning rod, an adjusting block, and regularly arranged pressure plates parallel to the surface of the terminal block. The number of pressure plates is the same as that of the floating contact and they are mounted on the side of the horizontal fixed plate away from the vertical plate by a vertical spring facing the clamped terminal block. The floating contact is mounted and fixed on each pressure plate facing the clamped terminal block. All pressure plates have through-holes or groups of through-holes and are fixed by a combination of positioning rods installed through them. Each pressure plate on both sides of the through-hole or group of through-holes has a spring fixing hole at the same position on the opposite side of the horizontal fixed plate. The two ends of the positioning rod are fixed to the adjusting block parallel to the pressure plate, and the adjusting block is fixedly mounted on the horizontal fixed plate.

[0008] Preferably, the piston rod of the cylinder is connected to the lower horizontal fixed plate via a floating joint.

[0009] Preferably, the pressure plate has two through-holes, and the two parallel through-holes form a through-hole group.

[0010] Preferably, the through-hole on the pressure plate is a vertically oriented slotted hole.

[0011] Preferably, the floating contact is a copper contact with silver points welded to the contact surface of the terminal block.

[0012] Preferably, the conductive busbar is a copper busbar.

[0013] Preferably, the pressure plate is made of steel.

[0014] Preferably, the vertical fixing plate and the slider are connected by an insulating plate.

[0015] Preferably, the insulating board is made of epoxy resin.

[0016] Compared to existing technologies, this solution offers the following advantages: By employing an integrated design, the entire test bench is concentrated on a single platform, consisting of upper and lower electrode assemblies that respectively press-fit the upper and lower terminal blocks of the circuit breaker. This high-current test bench is compact, features flexible parallel pressing, and provides stable and reliable test quality. Through adaptive stroke adjustment, this dedicated testing equipment boasts good compatibility and simple operation, forming a completely new testing method. In summary, this solution achieves the beneficial effects of improving test compatibility and safety, and reducing the degree of cosmetic damage to the product under test. Attached Figure Description

[0017] Figure 1 This is a perspective view of the entire machine according to an embodiment of this application;

[0018] Figure 2 This is a partial view of the clamp according to an embodiment of this application;

[0019] Figure 3 This is a three-dimensional schematic diagram of the first upper electrode assembly according to an embodiment of this application;

[0020] Figure 4 This is a side view schematic diagram of the first upper electrode assembly according to an embodiment of this application;

[0021] Figure 5 This is a three-dimensional schematic diagram of the first lower electrode assembly according to an embodiment of this application;

[0022] Figure 6 This is a three-dimensional schematic diagram of the second upper electrode assembly according to an embodiment of this application;

[0023] Figure 7 This is a three-dimensional schematic diagram of the second lower electrode assembly according to an embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the operation flow using an embodiment of this application;

[0025] Among them, 1-power supply, 2-clamp assembly, 200-base plate, 201-bracket, 202-vertical plate, 2021-lifting eye hole, 203-linear guide rail, 2031-slider, 204-upper limit hydraulic buffer, 205-lower limit hydraulic buffer, 206-conductive busbar, 207-cylinder, 208-insulating plate, 209-floating contact, 210-floating connector, 211-spring, 212-positioning rod, 213-pressure plate, 214-horizontal fixing plate, 215-vertical fixing plate, 216-adjusting block, 3a-first electrode assembly, 31-first upper end floating clamp, 32-first lower end floating clamp, 3b-second electrode assembly, 4-conductive flexible connection, 5-circuit breaker under test, 51a-upper terminal block, 51b-lower terminal block. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0027] This embodiment provides a technical solution: In this application, the high-current test bench includes a clamp assembly 2. The clamp assembly 2 is provided with contacts that connect to the terminal block of the circuit breaker 5 under test. In this embodiment, the circuit breaker 5 under test is a frame circuit breaker, and its terminal block includes two rows, namely an upper terminal block 5a and a lower terminal block 5b. The clamp assembly 2 includes a base plate 200, a vertical plate 202, and electrode assemblies. The vertical plate 202 is fixed to the middle of the base plate 200 by four triangular brackets 201 on its edge. The four triangular brackets 201 are back-to-back. Electrode assemblies, namely the upper first electrode assembly 3a and the lower second electrode assembly 3b, are installed on the vertical plate 202 at positions corresponding to the upper terminal block 5a and the lower terminal block 5b. Each electrode assembly includes a conductive bar 206 parallel to the terminal block, and a counter-movement device perpendicular to the terminal block, including a counter-movement limiting device. Parallel to the terminal block, the upper and lower floating clamps are provided. In this embodiment, four conductive busbars 206 are used. The upper and lower floating clamps are both located on the right side of the upright plate 202 and each has five regularly arranged contacts that are parallel to the surface of the terminal block and perpendicular to the extension direction of the terminal block. The contacts are floating contacts 209 adapted to the terminal block. The upper and lower floating clamps clamp the upper terminal block 51a and the lower terminal block 51b from the upper and lower sides of the upper terminal block 51a and the lower terminal block 51b respectively under the control of the opposing motion device. When clamped, the surface of the floating contact 209 is in contact with the upper and lower surfaces of the terminal block. In this embodiment, the upper and lower floating clamps are electrically connected to the conductive busbar 206 through the connection part using a conductive flexible connection 4. In this embodiment, the conductive busbar 206 is a copper busbar. In this way, the contacts and the rear copper busbar are connected by a flexible connection, making the movement smoother. The conductive busbars 206 are respectively fixed on the opposing motion device and extend to the other side of the upright plate 202 through the clearance hole opened on the upright plate 202 and are connected to the power supply 1. In this embodiment, the conductive flexible connection 4 is also used to connect to the power supply 1. The power supply 1 adopts an imported Phoenix high-current power supply to supply power to the entire test bench and perform high-current testing of the circuit breaker 5 under test, such as some items specified in the national standard GB / T 16927.4.

[0028] Taking the first electrode assembly 3a as an example, it includes two conductive bars 206, a counter-movement device perpendicular to the terminal block and including a counter-movement limiting device, and two floating clamps at the upper and lower ends parallel to the terminal block, namely the first upper floating clamp 31 and the first lower floating clamp 32. The counter-movement device includes two linear guide rails 203, four sliders 2031 on the two linear guide rails 203, two cylinders 207, two horizontal fixing plates 214, and four vertical fixing plates 215. The linear guide rails 203 are vertically and parallelly mounted on the upright plate 202. The horizontal fixing plates 214 include two upper and lower plates respectively connected to the upper floating clamp 31 and the lower floating clamp 32, and each horizontal fixing plate 214 has a vertical fixing plate 215 fixed near the end of the upright plate 202. The vertical fixing plates 215 are fixed to the linear guide rails 203 by their respective sliders 2031. The horizontal fixing plate 214 can move vertically towards each other along the linear guide rail 203. Two cylinders 207 are fixed on one of the upper parts of the horizontal fixing plate 214. The piston rod of the cylinder 207 passes through the upper horizontal fixing plate 214 and is connected to the lower horizontal fixing plate 214. In this embodiment, the piston rod of the cylinder 207 is connected to the lower horizontal fixing plate 214 through a floating joint 210. The conductive busbar 206 and the horizontal fixing plate 214 are fixed on the horizontal fixing plate 214 on the same side as the vertical plate 202, facing the clamped wiring board. The opposing movement limiting device uses a vertically installed hydraulic buffer. In this embodiment, in the first electrode assembly 3a, the upper hydraulic buffer uses an upper limit hydraulic buffer 204 fixed to the vertical plate 202 by a bracket. The upper limit hydraulic buffer 204 limits the vertical position of the uppermost horizontal fixing plate 214, making the limiting more stable. This modular structure for the upper and lower electrode assemblies allows for standardized assembly. Pneumatic clamping force is provided, and the vertical stroke is adjustable with a wider range than existing technologies, improving the compatibility with the circuit breaker 5 under test. The opposing motion device can be implemented using pneumatic and guide rail methods, or other methods such as electric and lead screw methods. The opposing motion limiting device can also be implemented using limiting blocks and buffer materials. In this embodiment, the vertical sliding mechanism uses standard guide rails, cylinders, and other standard components for ease of use and maintenance.

[0029] The second electrode assembly 3b has the same function as the first electrode assembly 3a. The linear guide rail 203 and cylinder 207 are installed on the outer side to avoid the structural components on the first electrode assembly 3a. Two lower limit hydraulic buffers 205 are used, with their heads facing downwards and mounted on the lowest horizontal fixing plate 214. The vertical position of the lowest horizontal fixing plate 214 can be limited by the contact of their heads with the upper surface of the base plate 200. For limiting the vertical position of the lower horizontal fixing plate 214 of the first electrode assembly 3a and the upper horizontal fixing plate 214 of the second electrode assembly 3b, in this embodiment, two hydraulic buffers are installed with their heads facing upwards on the upper horizontal fixing plate 214 of the second electrode assembly 3b, with their heads contacting the lower horizontal fixing plate 214 of the first electrode assembly 3a. In this way, the upper and lower hydraulic buffers control the opening and closing stroke of the upper and lower electrodes in a natural state, and the distance is adjustable.

[0030] Each of the aforementioned floating end clamps includes a cylindrical helical compression spring 211, a positioning rod 212, an adjusting block 216, and five pressure plates 213 arranged regularly parallel to the direction of the terminal block surface. The five pressure plates 213 of the first upper floating end clamp 31 and the first lower floating end clamp 32 are mounted on the side of the horizontal fixing plate 214 away from the vertical plate 202 via vertical springs 211 facing the upper terminal block 51a. The floating contact 209 is mounted and fixed on each pressure plate 213 facing the upper terminal block 51a. All the pressure plates 213 have two through-holes forming a through-hole group and are fixed by two positioning rods 212 installed through them. On both sides of the through-hole group, each pressure plate 213 has two rows of spring fixing holes at the same position on the opposite side of the horizontal fixing plate 214. The two ends of the positioning rod 212 are fixed on the adjusting block 216 parallel to the pressure plate 213. The adjusting block 216 is fixedly mounted on the horizontal fixing plate 214. In this embodiment, the two through-holes on the pressure plate 213 are vertically grooved holes. This allows the floating clamp at the end to utilize the grooved holes within the pressure plate 213 and the built-in spring 211 to support the floating contact 209, forming a rocker structure. This not only enables floating pressing but also provides better parallel horizontal pressing, effectively pressing the busbar horizontally and avoiding the noticeable indentations seen with older clamps. The multiple floating contacts 209 are copper contacts with silver points welded to the contact surface of the terminal block, resulting in better conductivity. The multi-electrode contacts offer better conductivity than traditional single-piece contacts. In this embodiment, the pressure plate 213 is made of steel, ensuring strength. This contrasts with existing technologies using a single piece of copper, which is less strong, prone to breakage, and has higher maintenance costs.

[0031] In this embodiment, the vertical fixing plate 215 is made of metal. An insulating plate 208 is used to connect the vertical fixing plate 215 and the slider 2031. The insulating plate 215 separates the connection between the vertical fixing plate 215 and the slider 2031 on the linear guide 203, thus providing insulation. In this embodiment, the insulating plate 208 is made of epoxy resin. When the vertical fixing plate 215 itself is made of non-metallic material, the insulating plate 208 may not be used.

[0032] In this embodiment, the upper part of the upright plate 202 is also provided with two lifting eyelet holes 2021 for suspending and fixing the entire clamp assembly 2.

[0033] In this embodiment of the high-current test bench, once the equipment is ready, push the circuit breaker under test (5) to place its terminal block inside the electrodes. Press the button, and cylinder 207 retracts. The upper and lower electrodes are held parallel and clamped by the linear guide rail 203. The floating contact 209 at the end of the electrode assembly can automatically clamp during crimping. Because it is floating and self-adaptively horizontal, it provides excellent conductivity and leaves no indentations on the surface. Then, the equipment automatically starts the test, and the test results are displayed on an external computer screen. The entire testing process is completed by the equipment, improving efficiency, reducing labor intensity, and ensuring stable quality.

[0034] The high-current test bench of this application has been put into production and used on the production line with good results. The testers have given positive feedback and it can be extended to other similar products with adjustable stroke, floating crimping and other testing requirements.

[0035] In the description of this application, it should be noted that the terms "center," "longitudinal," "horizontal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] The above description is only a preferred embodiment of the present solution, but the scope of protection claimed by the present solution is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A high-current test bench, comprising a clamp assembly (2), wherein the clamp assembly (2) is provided with contacts that connect to the terminal block of the circuit breaker (5) under test, characterized in that: The clamp assembly (2) includes a base plate (200), a vertical plate (202), and an electrode assembly. The vertical plate (202) is fixed to the middle of the base plate (200) by a triangular bracket (201) on its edge. Electrode assemblies are installed on the vertical plate (202) corresponding to the wiring plate positions. Each electrode assembly includes a conductive bar (206) parallel to the wiring plate, a counter-movement device perpendicular to the wiring plate including a counter-movement limiting device, and two floating end clamps parallel to the wiring plate. The two floating end clamps are each located on one side of the vertical plate (202) and each has more than one regularly arranged clamp. The contacts are parallel to the surface of the terminal block and perpendicular to the extension direction of the terminal block. The arrangement direction of the contacts is perpendicular to the terminal block. The contacts are floating contacts (209) adapted to the terminal block. The upper and lower floating clamps clamp the terminal block from both sides under the control of the opposing motion device. When clamped, the floating contact surface is in contact with the upper and lower surfaces of the terminal block. The upper and lower floating clamps are electrically connected to the conductive busbar (206) through the connection part. The conductive busbar (206) is fixed on the opposing motion device and extends to the other side of the upright plate (202) through the clearance hole opened on the upright plate (202) and is connected to the power supply (1).

2. The high-current test bench according to claim 1, characterized in that: The opposing motion device includes a linear guide rail (203), a slider (2031), a cylinder (207), a horizontal fixing plate (214), and a vertical fixing plate (215). More than one linear guide rail (203) is vertically and parallelly mounted on the upright plate (202). The horizontal fixing plate (214) includes two parts, one at the top and one at the bottom, which are respectively connected to the upper and lower floating clamps. Each horizontal fixing plate (214) has the same number of vertical fixing plates (215) as the linear guide rails (203) fixed near the end of the upright plate (202). Each vertical fixing plate (215) is connected to its respective slider (2031). Fixed on the linear guide rail (203), a cylinder (207) of the same number as the linear guide rail (203) is fixed on one of the upper horizontal fixing plates (214). The piston rod of the cylinder (207) passes through the upper horizontal fixing plate (214) and connects to the lower horizontal fixing plate (214). The conductive busbar (206) and the horizontal fixing plate (214) on the same side of the vertical plate (202) are fixed on the horizontal fixing plate (214) facing the clamped terminal block. The opposing motion limiting device uses a vertically installed hydraulic buffer. The hydraulic buffer limits the vertical position of the horizontal fixing plate (214).

3. The high-current test bench according to claim 2, characterized in that: Each of the aforementioned floating clamps includes a cylindrical helical compression spring (211), a positioning rod (212), an adjusting block (216), and regularly arranged pressure plates (213) parallel to the direction of the terminal block surface. The number of pressure plates (213) is the same as that of the floating contacts (209), and they are mounted on the side of the horizontal fixing plate (214) away from the vertical plate (202) by vertical springs (211) facing the terminal block they are clamped. The floating contacts (209) are fixedly mounted on each pressure plate (211) facing the terminal block they are clamped. 3) All the pressure plates (213) have through connecting holes or through connecting hole groups and are fixed by positioning rods (212) installed through them. Each pressure plate (213) on both sides of the through connecting hole or through connecting hole group has a spring fixing hole at the same position on the opposite side of the horizontal fixing plate (214). The two ends of the positioning rod (212) are fixed on the adjusting block (216) parallel to the pressure plate (213). The adjusting block (216) is fixedly installed on the horizontal fixing plate (214).

4. The high-current test bench according to claim 2, characterized in that: The piston rod of the cylinder (207) is connected to the lower horizontal fixed plate (214) via a floating joint (210).

5. The high-current test bench according to claim 3, characterized in that: The pressure plate (213) has two through-holes, and the two parallel through-holes form a through-hole group.

6. The high-current test bench according to claim 3, characterized in that: The through-hole on the pressure plate (213) is a vertical groove hole.

7. The high-current test bench according to claim 1, characterized in that: The floating contact (209) is a copper contact with silver points welded to the contact surface of the terminal block.

8. The high-current test bench according to claim 1, characterized in that: The conductive busbar (206) is a copper busbar.

9. The high-current test bench according to claim 3, characterized in that: The pressure plate (213) is made of steel.

10. The high-current test bench according to claim 2, characterized in that: The vertical fixing plate (215) and the slider (2031) are connected by an insulating plate (208).

11. The high-current test bench according to claim 10, characterized in that: The insulating board (208) is made of epoxy resin.

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