Loading device of air circuit breaker

Abstract

The invention discloses a loading device of an air circuit breaker, which comprises a test board, an air circuit breaker body and a processing assembly arranged outside the air circuit breaker body are arranged above the test board, the processing assembly comprises a clamping assembly arranged outside the air circuit breaker body, and a protection assembly is arranged outside the clamping assembly. When an air circuit breaker body needs to be tested, the air circuit breaker body needs to be clamped on the top face of a test table, the air circuit breaker body is placed on the inner side of a clamping plate, at the moment, a first telescopic rod is started to drive a supporting plate to move upwards, the outer wall of an extrusion rod fixedly installed in the supporting plate slides and extrudes the interior of an inclined frame, and the inclined frame slides on the outer wall of a limiting rod; push plates fixedly installed at the ends of the inclined frames move towards the air circuit breaker body, and the two push plates drive sliding rods slidably arranged in the push plates to move along with the push plates, so that the outer walls of clamping plates fixedly installed at the ends of the sliding rods make contact with the outer wall of the air circuit breaker body.

Description

Technical Field

[0001] The present invention relates to the technical field of loading devices for air circuit breakers, and in particular to a loading device for air circuit breakers. Background Art

[0002] An air circuit breaker is a protective device used in low-voltage power distribution systems. It can quickly cut off the current to protect circuits and equipment when the circuit is overloaded, short-circuited or other faults occur. Air circuit breakers have the characteristics of simple structure, easy maintenance and strong breaking capacity. They are widely used in industries, energy and infrastructure, commercial buildings, residential buildings and data centers. The loading device of an air circuit breaker usually refers to a device used to test the performance of the circuit breaker, especially for simulating the load conditions of the circuit breaker in actual work to verify its ampere-second characteristics, breaking capacity and other electrical parameters. This type of test device can help ensure that the circuit breaker meets safety and performance standards before installation and use.

[0003] When the air circuit breaker loading device tests the air circuit breaker, the air circuit breaker needs to be clamped on the test platform to facilitate the performance detection of the air circuit breaker. The clamping mechanism in the existing loading device is not convenient for quickly disassembling and assembling the air circuit breaker, which makes the air circuit breaker test efficiency low.

[0004] Therefore, we propose a loading device for an air circuit breaker which can quickly clamp the air circuit breaker to improve the testing efficiency of the air circuit breaker. Summary of the invention

[0005] The object of the present invention is to provide a loading device for an air circuit breaker to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a loading device for an air circuit breaker comprises a test bench, an air circuit breaker body is arranged above the test bench, and a processing component is arranged outside the air circuit breaker body, the processing component comprises a clamping component arranged outside the air circuit breaker body, a protective component is arranged outside the clamping component, and a test component is arranged below the protective component.

[0007] According to the above technical scheme, the clamping assembly includes a first telescopic rod fixedly installed under the test bench, a support plate fixedly installed at the end of the first telescopic rod, an extrusion rod fixedly installed inside the support plate, an inclined frame slidably provided on the outer wall of the extrusion rod, a limit rod slidably provided inside the inclined frame, a push plate fixedly installed at the end of the inclined frame, a sliding rod slidably provided inside the push plate, a spring is sleeved on the outer wall of the sliding rod, a clamping plate fixedly installed at the end of the sliding rod, a bracket fixedly installed on the outer wall of the clamping plate, a motor fixedly installed on the inner side of the bracket, an active roller fixedly installed on the output end of the motor, a guide belt sleeved on the outer wall of the active roller, and a driven roller sleeved on the guide belt.

[0008] According to the above technical solution, the protective component includes a limit frame fixedly installed on the top surface of the test bench, a sleeve block is slidably provided on the outer wall of the limit frame, a first protective frame is fixedly installed on the outer wall of the sleeve block, a handle is fixedly installed on the outer wall of the first protective frame, a card slot is opened on the side wall of the first protective frame, a first magnetic plate is fixedly installed inside the card slot, a second magnetic plate is clamped inside the card slot, a card block is fixedly installed on the side wall of the second magnetic plate, and a second protective frame is fixedly installed on the side of the card block away from the second magnetic plate.

[0009] According to the above technical solution, the test assembly includes a connection frame fixedly installed on the outer wall of the air circuit breaker body, a display mechanism fixedly installed on the outer wall of the test bench, a data transmission line fixedly connected to the outer wall of the display mechanism, a power supply body fixedly installed on one end of the data transmission line away from the display mechanism, a wiring harness fixedly installed on the outer wall of the power supply body, a connecting plate fixedly installed on one end of the wiring harness away from the power supply body, a connecting rod fixedly installed on the side of the connecting plate away from the wiring harness, a second telescopic rod fixedly installed on the outer wall of the connecting plate, and a fixing frame fixedly installed on the outer wall of the second telescopic rod.

[0010] According to the above technical solution, the inclined frame is inclined, and the outer wall of the inclined frame is slidably arranged with the test bench. Under the restriction of the inclined frame, when the extrusion rod contacts and extrudes the inside of the inclined frame, the inclined frame can drive the push plate fixedly installed at its end to move.

[0011] According to the above technical solution, there are four guide belts, which are divided into two groups and symmetrically distributed about the center line of the top surface of the test bench. The guide belts are made of rubber. Under the restriction of the guide belts moving in opposite directions, the air circuit breaker body can be guided and clamped to the center position of the top surface of the test bench. The guide belts made of rubber can increase the friction coefficient between them and the outer wall of the air circuit breaker body, so that the guiding effect is better.

[0012] According to the above technical solution, the first magnetic plate and the second magnetic plate are magnetically attracted to each other, and the second protective frame is slidably arranged with a sleeve block fixedly installed on the outer wall of the first protective frame and a limit frame fixedly installed on the top surface of the test bench. Under the restriction of magnetic attraction, the second protective frame and the first protective frame can be tightly closed for protection.

[0013] According to the above technical solution, the fixing frame is fixedly installed on the top surface of the test bench, and the fixing frame is fixedly installed on the outer wall of the second telescopic rod. Under the support of the fixing frame, the second telescopic rod can stably push the connecting rod.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The loading device of the air circuit breaker of the present invention is composed of a clamping assembly as one of its components. When the air circuit breaker body needs to be tested, it needs to be clamped on the top surface of the test bench, and the air circuit breaker body is placed inside the clamping plate. At this time, the first telescopic rod is started, which drives the support plate to move upward, and the outer wall of the extrusion rod fixedly installed inside the support plate slides and squeezes inside the inclined frame, so that the inclined frame slides on the outer wall of the limit rod, and the push plate fixedly installed at the end of the inclined frame moves toward the air circuit breaker body, and the two push plates drive the sliding rods set inside them to move accordingly, so that the ends of the sliding rods The outer wall of the fixedly installed clamping plate contacts the outer wall of the air circuit breaker body. As the push plate moves, it compresses the spring sleeved on the outer wall of the sliding rod. Under the elastic action of the spring, it applies pressure to the outer wall of the clamping plate, so that the clamping plate stably clamps the outer wall of the air circuit breaker body. When the air circuit breaker body needs to be disassembled, the first telescopic rod is started, which drives the support plate and the extrusion rod to move downward, so that the two sets of inclined frames move in opposite directions to release the clamped air circuit breaker body. This structure can quickly clamp the air circuit breaker body, making the air circuit breaker body test more efficient.

[0015] 2. The loading device of the air circuit breaker of the present invention is composed of a clamping assembly as one component. When the air circuit breaker body is clamped, it needs to be placed at the center position of the top surface of the test bench. When the first telescopic rod is working, the motor is started at this time, and the active roller fixedly installed at its output end rotates accordingly. The active roller drives the driven roller to rotate accordingly through the guide belt. When the outer wall of the air circuit breaker body contacts the rotating guide belt, the guide belt guides the air circuit breaker body to the center position of the test bench. Under the restriction of the four guide belts, the air circuit breaker body can be guided to the center position of the top surface of the test bench to limit the clamping of the air circuit breaker body. This structure can guide the position of the air circuit breaker body above the test bench so that the connecting frame opened on the outer wall of the air circuit breaker body is accurately aligned with the connecting rod.

[0016] 3. The loading device of the air circuit breaker of the present invention is composed of a protective component as one component. When the performance of the air circuit breaker body needs to be tested, it is clamped on the top surface of the test bench, and the air circuit breaker body is tested by the test component. When the air circuit breaker body is overloaded and catches fire, the operator pushes the first protective frame and the second protective frame toward each other to make the inside of the air circuit breaker body closed, isolating oxygen while preventing the fire from hurting people. The block fixedly installed on the outer wall of the second protective frame is engaged with the slot provided on the outer wall of the first protective frame, and the second magnetic plate is magnetically attracted to the first magnetic plate. Under its restriction, the second protective frame can be tightly closed with the first protective frame. This structure can make the performance test of the air circuit breaker body safer.

[0017] 4. The loading device of the air circuit breaker of the present invention is composed of a test assembly as one part. When the performance of the air circuit breaker body needs to be tested, it is clamped on the top surface of the test bench. When the connecting frame fixedly installed on the outer wall of the air circuit breaker body is aligned with the connecting rod, the second telescopic rod is started at this time, which plugs the connecting rod fixedly installed on the outer wall of the connecting plate into the connecting frame, and the power supply body is started, which transmits power to the wiring harness, transmits power to the connecting rod through the connecting plate, and the connecting rod transmits power through the connecting frame. When the power of the power supply body increases, the data is transmitted to the inside of the display mechanism through the data transmission line, and the operator observes the performance status of the air circuit breaker body through the display mechanism. This structure can make the air circuit breaker body be energized under the restriction of the second telescopic rod after the air circuit breaker body is clamped, and the operator does not need to manually participate in the air circuit breaker body testing process, thereby improving the safety of the air circuit breaker body testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a three-dimensional front structural schematic diagram of the loading device of the air circuit breaker of the present invention; Figure 2 It is a schematic diagram of a three-dimensional clamping assembly, a protection assembly and a testing assembly of a loading device of an air circuit breaker of the present invention; Figure 3 A schematic diagram of a clamping assembly of a loading device of an air circuit breaker of the present invention; Figure 4 It is a partial exploded schematic diagram of a clamping assembly of a loading device of an air circuit breaker of the present invention; Figure 5 A partial cross-sectional schematic diagram of a clamping assembly of a loading device of an air circuit breaker of the present invention; Figure 6 A schematic diagram of a protection component of a loading device of an air circuit breaker of the present invention; Figure 7A schematic cross-sectional view of a protection component of a loading device of an air circuit breaker of the present invention; Figure 8 A schematic diagram of a test assembly of a loading device for an air circuit breaker of the present invention; Fig. 9 It is a schematic diagram of an explosion of a test assembly of a loading device of an air circuit breaker of the present invention; In the figure: 1, test bench; 2, air circuit breaker body; 3, processing assembly; 31, clamping assembly; 33, protection assembly; 34, test assembly; 311, first telescopic rod; 312, support plate; 313, extrusion rod; 314, inclined frame; 315, limit rod; 316, push plate; 317, slide bar; 318, spring; 319, clamping plate; 320, bracket; 321, motor; 322, active roller; 323, guide belt; 324, Driven roller; 331, limit frame; 332, sleeve block; 333, first protective frame; 334, handle; 335, card slot; 336, first magnetic plate; 337, second protective frame; 338, card block; 339, second magnetic plate; 341, connecting frame; 342, connecting rod; 343, connecting plate; 344, wiring harness; 345, power supply body; 346, second telescopic rod; 347, fixing frame; 348, data transmission line; 349, display mechanism. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0023] A preferred embodiment of the loading device for the air circuit breaker provided by the present invention is as follows: Figures 1 to 9 Shown: A loading device for an air circuit breaker, including a test bench 1; An air circuit breaker body 2 is arranged above the test bench 1; And a processing assembly 3 arranged outside the air circuit breaker body 2, the processing assembly 3 includes a clamping assembly 31 arranged outside the air circuit breaker body 2, the clamping assembly 31 includes a first telescopic rod 311 fixedly installed under the test bench 1, a support plate 312 is fixedly installed at the end of the first telescopic rod 311, an extrusion rod 313 is fixedly installed inside the support plate 312, an outer wall of the extrusion rod 313 is slidably provided with an inclined frame 314, a limit rod 315 is slidably provided inside the inclined frame 314, and the inclined frame A push plate 316 is fixedly installed at the end of 314, a slide bar 317 is slidably arranged inside the push plate 316, a spring 318 is sleeved on the outer wall of the slide bar 317, a clamping plate 319 is fixedly installed at the end of the slide bar 317, a bracket 320 is fixedly installed on the outer wall of the clamping plate 319, a motor 321 is fixedly installed on the inner side of the bracket 320, an active roller 322 is fixedly installed on the output end of the motor 321, a guide belt 323 is sleeved on the outer wall of the active roller 322, and a driven roller 324 is sleeved inside the guide belt 323.

[0024] In this embodiment, when the air circuit breaker body 2 needs to be tested, it needs to be clamped on the top surface of the test bench 1, and the air circuit breaker body 2 is placed inside the clamping plate 319. At this time, the first telescopic rod 311 is started, which drives the support plate 312 to move upward, and the outer wall of the extrusion rod 313 fixedly installed inside the support plate 312 slides and squeezes inside the inclined frame 314, so that the inclined frame 314 slides on the outer wall of the limit rod 315, and the push plate 316 fixedly installed at the end of the inclined frame 314 moves toward the direction of the air circuit breaker body 2, and the two push plates 316 are moved. 16 drives the sliding rod 317 slidably arranged inside it to move accordingly, so that the outer wall of the clamping plate 319 fixedly installed at the end of the sliding rod 317 contacts the outer wall of the air circuit breaker body 2. As the push plate 316 moves, it compresses the spring 318 sleeved on the outer wall of the sliding rod 317. Under the elastic action of the spring 318, it applies pressure to the outer wall of the clamping plate 319, so that the clamping plate 319 stably clamps the outer wall of the air circuit breaker body 2. When the air circuit breaker body 2 needs to be disassembled, the first telescopic rod 311 is started, which drives the support plate 319 to move. 12 and the extrusion rod 313 move downward, so that the two sets of inclined frames 314 move in the opposite direction to loosen the clamped air circuit breaker body 2. This structure can quickly clamp the air circuit breaker body 2, making the test efficiency of the air circuit breaker body 2 higher. When the air circuit breaker body 2 is clamped, it needs to be placed at the center of the top surface of the test bench 1. When the first telescopic rod 311 works, the motor 321 is started at this time, and the active roller 322 fixedly installed at its output end rotates accordingly. The active roller 322 drives the driven roller 321 through the guide belt 323. 4 rotates accordingly. When the outer wall of the air circuit breaker body 2 contacts the rotating guide belt 323, the guide belt 323 guides the air circuit breaker body 2 to the center of the test bench 1. Under the restriction of the four guide belts 323, the air circuit breaker body 2 can be guided to the center of the top surface of the test bench 1 to limit the clamping of the air circuit breaker body 2. This structure can guide the position of the air circuit breaker body 2 above the test bench 1, so that the connection frame 341 opened on the outer wall of the air circuit breaker body 2 is accurately aligned with the connection rod 342. Example 2

[0025] A preferred embodiment of the loading device for the air circuit breaker provided by the present invention is as follows: Figures 1 to 9 As shown: the protection component 33 includes a limit frame 331 fixedly installed on the top surface of the test bench 1, a sleeve block 332 is slidably provided on the outer wall of the limit frame 331, a first protection frame 333 is fixedly installed on the outer wall of the sleeve block 332, a handle 334 is fixedly installed on the outer wall of the first protection frame 333, a slot 335 is opened on the side wall of the first protection frame 333, a first magnetic plate 336 is fixedly installed inside the slot 335, a second magnetic plate 339 is clamped inside the slot 335, a block 338 is fixedly installed on the side wall of the second magnetic plate 339, and a second protection frame 337 is fixedly installed on the side of the block 338 away from the second magnetic plate 339.

[0026] In this embodiment, when the performance of the air circuit breaker body 2 needs to be tested, it is clamped on the top surface of the test bench 1, and the air circuit breaker body 2 is tested through the test assembly 34. When the air circuit breaker body 2 is overloaded and catches fire, the operator pushes the first protective frame 333 and the second protective frame 337 toward each other to make the interior of the air circuit breaker body 2 closed, isolating oxygen while preventing the fire from hurting people. The block 338 fixedly installed on the outer wall of the second protective frame 337 is engaged with the slot 335 opened on the outer wall of the first protective frame 333, and the second magnetic plate 339 is magnetically attracted to the first magnetic plate 336. Under its restriction, the second protective frame 337 can be tightly closed with the first protective frame 333. This structure can make the performance test of the air circuit breaker body 2 safer. Example 3

[0027] A preferred embodiment of the loading device for the air circuit breaker provided by the present invention is as follows: Figures 1 to 9 As shown: the test assembly 34 includes a connection frame 341 fixedly mounted on the outer wall of the air circuit breaker body 2, a display mechanism 349 fixedly mounted on the outer wall of the test bench 1, a data transmission line 348 fixedly connected to the outer wall of the display mechanism 349, a power supply body 345 fixedly mounted on the end of the data transmission line 348 away from the display mechanism 349, a wiring harness 344 fixedly mounted on the outer wall of the power supply body 345, a connecting plate 343 fixedly mounted on the end of the wiring harness 344 away from the power supply body 345, a connecting rod 342 fixedly mounted on the side of the connecting plate 343 away from the wiring harness 344, a second telescopic rod 346 fixedly mounted on the outer wall of the connecting plate 343, and a fixing frame 347 fixedly mounted on the outer wall of the second telescopic rod 346.

[0028] In this embodiment, when the performance of the air circuit breaker body 2 needs to be tested, it is clamped on the top surface of the test bench 1. When the connecting frame 341 fixedly installed on the outer wall of the air circuit breaker body 2 is aligned with the connecting rod 342, the second telescopic rod 346 is started at this time, which plugs the connecting rod 342 fixedly installed on the outer wall of the connecting plate 343 into the connecting frame 341, and the power supply body 345 is started, which transmits power to the wiring harness 344, transmits power to the connecting rod 342 through the connecting plate 343, and the connecting rod 342 transmits power through the connecting frame 341. When the power of the power supply body 345 increases, the data is transmitted to the inside of the display mechanism 349 through the data transmission line 348, and the operator observes the performance status of the air circuit breaker body 2 through the display mechanism 349. This structure allows the air circuit breaker body 2 to be powered on under the restriction of the second telescopic rod 346 after the air circuit breaker body 2 is clamped, and the operator does not need to manually participate in the test process of the air circuit breaker body 2, thereby improving the test safety of the air circuit breaker body 2.

[0029] Among them, the inclined frame 314 is set at an angle, and the outer wall of the inclined frame 314 is set to slide with the test bench 1. Under the restriction of the inclined frame 314, when the extrusion rod 313 contacts and extrudes the inside of the inclined frame 314, the inclined frame 314 can drive the push plate 316 fixed at its end to move.

[0030] Among them, there are four guide belts 323, which are divided into two groups and are symmetrically distributed with respect to the center line of the top surface of the test bench 1. The guide belts 323 are made of rubber. Under the restriction of the guide belts 323 moving in opposite directions, the air circuit breaker body 2 can be guided and clamped to the center position of the top surface of the test bench 1. The guide belts 323 made of rubber can increase the friction coefficient between them and the outer wall of the air circuit breaker body 2, so that the guiding effect is better.

[0031] Among them, the first magnetic plate 336 and the second magnetic plate 339 are magnetically attracted to each other, and the second protective frame 337 and the sleeve block 332 fixedly installed on the outer wall of the first protective frame 333 are slidably arranged with the limit frame 331 fixedly installed on the top surface of the test bench 1. Under the restriction of magnetic attraction, the second protective frame 337 and the first protective frame 333 can be tightly closed for protection.

[0032] The fixing frame 347 is fixedly installed on the top surface of the test bench 1 , and the fixing frame 347 is fixedly installed on the outer wall of the second telescopic rod 346 . With the support of the fixing frame 347 , the second telescopic rod 346 can stably push the connecting rod 342 .

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A loading device for an air circuit breaker, comprising a test bench (1); An air circuit breaker body (2) is arranged above the test bench (1); and a processing assembly (3) arranged outside the air circuit breaker body (2), characterized in that: The processing assembly (3) comprises a clamping assembly (31) arranged outside the air circuit breaker body (2), a protection assembly (33) is arranged outside the clamping assembly (31), and a testing assembly (34) is arranged below the protection assembly (33).

2. The loading device for an air circuit breaker according to claim 1, characterized in that: The clamping assembly (31) comprises a first telescopic rod (311) fixedly mounted below the test bench (1); a support plate (312) fixedly mounted at the end of the first telescopic rod (311); an extrusion rod (313) fixedly mounted inside the support plate (312); an inclined frame (314) slidably disposed on the outer wall of the extrusion rod (313); a limit rod (315) slidably disposed inside the inclined frame (314); a push plate (316) fixedly mounted at the end of the inclined frame (314); a push plate (316) slidably disposed inside the push plate (316). A slide bar (317) is provided, the outer wall of the slide bar (317) is sleeved with a spring (318), a clamping plate (319) is fixedly mounted on the end of the slide bar (317), a bracket (320) is fixedly mounted on the outer wall of the clamping plate (319), a motor (321) is fixedly mounted on the inner side of the bracket (320), an active roller (322) is fixedly mounted on the output end of the motor (321), a guide belt (323) is sleeved on the outer wall of the active roller (322), and a driven roller (324) is sleeved inside the guide belt (323).

3. The loading device for an air circuit breaker according to claim 1, characterized in that: The protection assembly (33) comprises a limit frame (331) fixedly mounted on the top surface of the test bench (1); a sleeve block (332) is slidably mounted on the outer wall of the limit frame (331); a first protection frame (333) is fixedly mounted on the outer wall of the sleeve block (332); a handle (334) is fixedly mounted on the outer wall of the first protection frame (333); a slot (335) is provided on the side wall of the first protection frame (333); a first magnetic plate (336) is fixedly mounted inside the slot (335); a second magnetic plate (339) is clamped inside the slot (335); a block (338) is fixedly mounted on the side wall of the second magnetic plate (339); and a second protection frame (337) is fixedly mounted on the side of the block (338) away from the second magnetic plate (339).

4. The loading device for an air circuit breaker according to claim 1, characterized in that: The test assembly (34) comprises a connection frame (341) fixedly mounted on the outer wall of the air circuit breaker body (2); a display mechanism (349) fixedly mounted on the outer wall of the test bench (1); a data transmission line (348) fixedly connected to the outer wall of the display mechanism (349); a power supply body (345) fixedly mounted on one end of the data transmission line (348) away from the display mechanism (349); a wiring harness (344) fixedly mounted on the outer wall of the power supply body (345); a connecting plate (343) fixedly mounted on one end of the wiring harness (344) away from the power supply body (345); a connecting rod (342) fixedly mounted on one side of the connecting plate (343) away from the wiring harness (344); a second telescopic rod (346) fixedly mounted on the outer wall of the connecting plate (343); and a fixing frame (347) fixedly mounted on the outer wall of the second telescopic rod (346).

5. The loading device for an air circuit breaker according to claim 2, characterized in that: The inclined frame (314) is arranged in an inclined manner, and the outer wall of the inclined frame (314) is arranged to slide with the test bench (1).

6. The loading device for an air circuit breaker according to claim 2, characterized in that: There are four guide belts (323) in number, which are divided into two groups and are symmetrically distributed about the center line of the top surface of the test bench (1); the guide belts (323) are made of rubber.

7. The loading device for an air circuit breaker according to claim 3, characterized in that: The first magnetic plate (336) and the second magnetic plate (339) are magnetically attracted to each other, and the second protective frame (337) and the sleeve block (332) fixedly mounted on the outer wall of the first protective frame (333) and the limit frame (331) fixedly mounted on the top surface of the test bench (1) are slidably arranged.

8. The loading device for an air circuit breaker according to claim 4, characterized in that: The fixing frame (347) is fixedly mounted on the top surface of the test bench (1), and the fixing frame (347) is fixedly mounted on the outer wall of the second telescopic rod (346).

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