A safety performance detection device of a power distribution cabinet

Abstract

This invention relates to the field of electrical distribution cabinet safety testing technology. The invention provides a safety performance testing device for electrical distribution cabinets, including a handle. A U-shaped frame is fixedly installed on the front side of the handle, and fixed plates are fixedly installed on both the upper and lower sides of the U-shaped frame. The fixed plates are equipped with positioning mechanisms for positioning and fixing. This invention achieves simultaneous pull-out testing of the inlet and outlet terminals of the air switch inside the electrical distribution cabinet through the combined use of a pull-out mechanism and an equal-division clamping mechanism. This results in high testing efficiency. The pull-out force is achieved using a spring tension gauge, quantifying the resistance to pull-out and facilitating accurate test results. An infrared thermal imager scans the wiring points of the air switch inside the electrical distribution cabinet under energized conditions; abnormally high temperatures indicate wiring problems. The pull-out mechanism and equal-division clamping mechanism are used to test the wiring points of the air switch inside the electrical distribution cabinet under de-energized conditions, thus achieving both energized and de-energized testing.

Description

Technical Field

[0001] This invention belongs to the field of power distribution cabinet safety testing technology, and specifically relates to a power distribution cabinet safety performance testing device. Background Technology

[0002] A distribution cabinet is a device used in a power system to distribute electrical energy. It is commonly used in industrial, commercial, and residential buildings. It contains one or more switching devices, protective devices, measuring instruments, and connection terminals. The function of a distribution cabinet is to distribute current from the power source to different circuits or devices, and to provide overload and short-circuit protection to ensure electrical safety. Distribution cabinets require regular safety inspections to eliminate potential safety hazards. Safety performance testing of distribution cabinets includes safety testing of the circuit breaker wiring. (The attached diagram shows the wiring of the circuit breaker.) Figure 9 As shown, loose wiring can easily lead to increased contact resistance and localized overheating, which can damage internal components of the distribution cabinet and cause circuit faults. Therefore, a device is needed to test the tightness of the wiring.

[0003] A safety performance testing device for a power distribution cabinet, as proposed in patent announcement CN118091497A, includes a handle, an operating chamber fixedly mounted at the front end of the handle, a battery pack fixedly mounted on the upper side of the handle, a first motor fixedly mounted on the rear edge of the operating chamber, a second motor mounted on the upper side of the handle in the middle of the rear wall of the operating chamber, and a third motor fixedly mounted on the upper edge of the operating chamber. An adjustable clamping pull-out mechanism is provided inside the operating chamber, and a pressure limiting mechanism is provided between the adjustable clamping pull-out mechanism and the second motor. This invention avoids manual testing, reducing the risk of electric shock. It can test multiple wires at once, and the testing spacing can be freely adjusted according to the wire spacing of different power distribution cabinets, greatly improving efficiency. By using a standard force for correction, the consistency and accuracy of the testing force are ensured, effectively avoiding the problems of accidental wire removal or missed detection.

[0004] However, the device described in the aforementioned patent applies a pulling force during the testing process, using whether the cable protrudes as a measure of its strength. This lacks clear parameter standards, making it difficult to obtain accurate test results. Furthermore, simultaneously pulling and testing multiple cables at once results in a large pulling force, which can easily damage components. Additionally, the wiring switches in the distribution cabinet include both inlet and outlet terminals, and existing equipment struggles to simultaneously test both, leading to low testing efficiency. Moreover, the testing force applied to the inlet and outlet terminals is inconsistent each time, resulting in errors and reducing the accuracy of the tests. Summary of the Invention

[0005] The purpose of this invention is to provide a simple and reasonably designed safety performance testing device for power distribution cabinets in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] A safety performance testing device for a power distribution cabinet includes a handle, a U-shaped frame fixedly installed on the front side of the handle, and fixed plates fixedly installed on both the upper and lower sides of the U-shaped frame. The fixed plates are provided with positioning mechanisms for positioning and fixing, and a pad is installed on the rear side of each fixed plate.

[0008] Also includes:

[0009] A pulling mechanism is mounted on multiple pads;

[0010] The equal-division clamping mechanism is installed on the pulling mechanism. It clamps and fixes the wiring of the air switch in the distribution cabinet. The pulling mechanism drives the equal-division clamping mechanisms to move away from each other, thereby testing the tightness of the wiring of the air switch in the distribution cabinet.

[0011] Preferably, the handle is equipped with a battery pack for power supply, the handle has an end cap on the rear side, a fixed arm is fixedly connected to the middle right side of the U-shaped frame, a rotating pin is rotatably installed on the end of the fixed arm away from the U-shaped frame, an infrared thermal imager is fixedly connected to the rotating pin, and two clearance holes are symmetrically opened on the upper and lower sides of the U-shaped frame.

[0012] Preferably, the positioning mechanism includes guide rods that are symmetrically fixed between two fixed plates. The two guide rods slide through two positioning clamping plates. Anti-slip plates are fixedly installed at the front end of the two positioning clamping plates on the side close to each other. Pads are fixedly installed at the rear end of the two positioning clamping plates on the side close to each other. A No. 3 spring is sleeved at both ends of the two guide rods. The No. 3 spring is located between the fixed plate and the positioning clamping plate.

[0013] Preferably, the pulling mechanism includes a mounting base fixedly installed in the middle of the front side of the U-shaped frame, a double-headed telescopic electric cylinder fixedly installed on the mounting base, the two output ends of the double-headed telescopic electric cylinder respectively movably passing through the clearance hole, and a fixing head fixedly installed on the output end of the double-headed telescopic electric cylinder.

[0014] Preferably, a limiting slide rail is fixedly installed between two symmetrical pads. Baffles are fixedly installed at both ends of the limiting slide rail. Two limiting sliders are slidably installed on each limiting slide rail. A connecting rod is fixedly connected between the two limiting sliders at the same height. A fixing head is fixedly connected to the middle of the connecting rod. An installation rod is fixedly connected to the side of the limiting slider away from the connecting rod. A reinforcing rib is fixedly connected between the installation rod and the limiting slider.

[0015] Preferably, a hook is fixedly installed on one side of the fixing head, and a spring tension gauge is installed between the two hooks.

[0016] Preferably, the equal-division clamping mechanism includes a fixed box, a clamping component, a limiting groove, a guide slide rail, and an equal-division component. The fixed box is fixedly installed on two mounting rods at the same height. The limiting groove is opened on the front side of the fixed box. The guide slide rail and the equal-division component are arranged inside the fixed box, and the clamping component is arranged on the equal-division component.

[0017] Preferably, the equal-dividing component includes a fixed base fixedly installed on one side of the bottom surface inside the fixed box, a servo motor fixedly installed on the fixed base, a lead screw fixedly connected to the output end of the servo motor, a fixed block rotatably installed at the end of the lead screw away from the servo motor, the fixed block being set on the bottom surface inside the fixed box, a movable block being threadedly connected to the lead screw via a ball nut, several guide sliders being evenly slidably connected on the guide slide rail, a support plate fixedly installed on the rear side of the guide sliders, a telescopic linkage assembly being provided on multiple support plates, and the top of the movable block being fixedly connected to the bottom of the support plate on the side closer to the servo motor.

[0018] Preferably, the clamping assembly includes a side plate fixedly connected to the top of the guide slider. A limit rod is fixedly installed at the top center of the side plate. Two fixed rods are symmetrically slidably installed on the limit rod. Two stop blocks are fixedly connected to both ends of the limit rod. Two springs are sleeved on the outside of the limit rod. The springs are positioned between the fixed rod and the stop blocks. Limit blocks are fixedly installed at the top and bottom of the fixed rod. Guide grooves that slidably connect with the edge of the limit groove are opened on the limit blocks. A clamping plate is fixedly installed at one end of the fixed rod. Several anti-slip strips for increasing friction are evenly fixedly installed on the inner wall of the clamping plate. A guide groove is opened on the front side of the clamping plate. Two reinforcing parts are symmetrically arranged between the two clamping plates.

[0019] Preferably, the reinforcing part includes a positioning pin fixedly installed on the clamping plate, a first stop block is fixedly installed at the end of the positioning pin away from the clamping plate, and a second spring is provided between the two positioning pins at the same height.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. Unlike existing technologies, this invention achieves simultaneous pull-out testing of the inlet and outlet ends of the air switch inside the distribution cabinet by using a pull-out mechanism and an equal-division clamping mechanism in combination. This results in high testing efficiency. Furthermore, the pull-out force is measured by a spring tension gauge, which quantifies the resistance to pull-out and facilitates accurate test results. The synchronous and symmetrical pull-out at both ends ensures that the forces are the same, reducing variables and improving the accuracy of the test results.

[0022] 2. Unlike existing technologies, the positioning mechanism enables the positioning and clamping of the testing equipment and the air switch inside the distribution cabinet. During testing, there is no need to hold the equipment by hand, saving time and effort. Moreover, the equipment is stable and reliable during testing, avoiding the impact of shaking on the test results.

[0023] 3. Unlike existing technologies, this device uses an infrared thermal imager to scan the wiring of the air switch inside the distribution cabinet while it is energized. If the temperature is abnormally high, it indicates a problem with the wiring. The device also uses a pull-out mechanism and a clamping mechanism to detect the wiring of the air switch inside the distribution cabinet while it is de-energized. This allows for both energized and de-energized detection, making the device fully functional. Attached Figure Description

[0024] Figure 1 This is a three-dimensional first-view schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a three-dimensional second-view schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is an exploded view of the handle, positioning mechanism, U-shaped frame, and infrared thermal imager of the present invention;

[0027] Figure 4 This is a perspective view of the equal-division clamping mechanism and the pulling mechanism of the present invention;

[0028] Figure 5 This is an exploded view of the equal-division clamping mechanism and the pulling mechanism of the present invention;

[0029] Figure 6 This is a partial cross-sectional view of the equally divided clamping mechanism of the present invention;

[0030] Figure 7 This is an exploded view of the equally divided clamping mechanism of the present invention;

[0031] Figure 8 This is a perspective view of the clamping component of the present invention;

[0032] Figure 9 This is a three-dimensional view of the air switch inside the distribution cabinet of the present invention.

[0033] In the diagram: 1. Handle; 2. End cap; 3. Divided clamping mechanism; 31. Fixing box; 32. Clamping assembly; 320. Limiting rod; 321. Side plate; 322. Spring No. 1; 323. Limiting block; 324. Fixing rod; 325. Reinforcing part; 3251. Positioning pin; 3252. Stop block No. 1; 3253. Spring No. 2; 326. Anti-slip strip; 327. Guide groove; 328. Clamping plate; 329. Stop block No. 2; 33. Limiting groove; 34. Guide slide rail; 35. Divided assembly; 351. Fixing base; 352. Servo motor; 353. Lead screw; 354. Moving block; 355. Fixed 356. Support plate; 357. Telescopic linkage assembly; 358. Guide slider; 4. Positioning mechanism; 41. Positioning clamping plate; 42. Anti-slip plate; 43. No. 3 spring; 44. Guide rod; 45. Pad; 5. U-shaped frame; 6. Pulling mechanism; 61. Mounting base; 62. Double-headed telescopic electric cylinder; 63. Limit slider; 64. Fixed head; 65. Connecting rod; 66. Limit slide rail; 67. Mounting rod; 68. Reinforcing rib; 7. Hook; 8. Spring tension gauge; 9. Fixed arm; 10. Infrared thermal imager; 11. Rotating pin; 12. Battery pack; 13. Fixing plate; 14. Clearing hole; 15. Pad. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0035] Example: Please refer to Figure 1 , Figure 2 and Figure 3 A safety performance testing device for a power distribution cabinet includes a handle 1, a U-shaped frame 5 fixedly installed on the front side of the handle 1, and fixed plates 13 fixedly installed on the upper and lower sides of the U-shaped frame 5. The fixed plates 13 are equipped with positioning mechanisms 4 for positioning and fixing. Two pads 15 are symmetrically fixedly installed on the rear side of each fixed plate 13. A pulling mechanism 6 is provided on all four pads 15. The pulling mechanism 6 is equipped with equally spaced clamping mechanisms 3. The equally spaced clamping mechanisms 3 clamp and fix the wiring of the power distribution cabinet's air switch. The pulling mechanism 6 drives the equally spaced clamping mechanisms 3 to move away from each other, thereby allowing the pulling mechanism 6 to test the secureness of the wiring of the power distribution cabinet's air switch.

[0036] In use, handle 1 is used to hold the device, and positioning mechanism 4 is used to position and clamp the device onto the air switch inside the distribution cabinet, thus achieving the positioning and clamping of the device and ensuring the overall stability of the device during testing. The cooperation between the pulling mechanism 6 and the equal-division clamping mechanism 3 enables the pulling test of the wiring of the air switch inside the distribution cabinet. The equal-division clamping mechanism 3 is used to clamp the wires and can be adjusted according to the spacing of the wires.

[0037] Please see Figure 1 and Figure 3 The handle 1 has a battery pack 12 for power supply inside. The handle 1 has an end cap 2 on the rear side. The right middle of the U-shaped frame 5 is fixedly connected to a fixed arm 9. The fixed arm 9 is rotatably mounted with a rotating pin 11 at the end away from the U-shaped frame 5. The rotating pin 11 is fixedly connected to an infrared thermal imager 10. There is damping between the rotating pin 11 and the fixed arm 9, which makes it easy to adjust the angle of the infrared thermal imager 10. The U-shaped frame 5 has two symmetrical clearance holes 14 on the top and bottom. The battery pack 12 is used to power the infrared thermal imager 10 and the equal-division clamping mechanism 3.

[0038] During use, the end cap 2 is used to fix the battery pack 12, and the fixing arm 9 is used to fix the infrared thermal imager 10. The infrared thermal imager 10 is used to detect the temperature of the wiring terminals of the air switch inside the distribution cabinet. If the temperature is abnormal and higher than the normal operating temperature, it indicates that there is a problem with the wiring quality.

[0039] Please see Figure 2 and Figure 3 The positioning mechanism 4 includes guide rods 44 that are symmetrically fixed between two fixed plates 13. The two guide rods 44 slide through two positioning clamping plates 41. Anti-slip plates 42 are fixedly installed at the front end of the two positioning clamping plates 41 on the side close to each other. Pads 45 are fixedly installed at the rear end of the two positioning clamping plates 41 on the side close to each other. A No. 3 spring 43 is sleeved at both ends of the two guide rods 44. The No. 3 spring 43 is located between the fixed plate 13 and the positioning clamping plate 41.

[0040] When in use, open the cabinet door of the distribution cabinet and turn off the power supply of the distribution cabinet. At this time, hold handle 1 and insert the positioning clamping plate 41 into the middle protruding part of the air switch. As it is inserted, the positioning clamping plate 41 and the anti-slip plate 42 move away from each other until the positioning clamping plate 41 and the anti-slip plate 42 clamp and fix the middle protruding part of the air switch. The clamping and fixing of the equipment is achieved by the elastic force of the No. 3 spring 43, which ensures the stability of the equipment during use and avoids the influence of shaking on the test results of the equipment.

[0041] Please see Figure 2 , Figure 4 and Figure 5The pulling mechanism 6 includes a mounting base 61 fixedly installed in the middle of the front side of the U-shaped frame 5. A double-headed telescopic electric cylinder 62 is fixedly installed on the mounting base 61. The two output ends of the double-headed telescopic electric cylinder 62 respectively move through the clearance hole 14. A fixed head 64 is fixedly installed on the output end of the double-headed telescopic electric cylinder 62. A limit slide rail 66 is fixedly installed between two symmetrical pads 15. Baffles are fixedly installed at both ends of the limit slide rail 66. Two limit sliders 63 are slidably installed on each limit slide rail 66. A connecting rod 65 is fixedly connected between the two limit sliders 63 at the same height. The fixed head 64 is fixedly connected to the middle of the connecting rod 65. An installation rod 67 is fixedly connected to the side of the limit slider 63 away from the connecting rod 65. A reinforcing rib 68 is fixedly connected between the installation rod 67 and the limit slider 63. A hook 7 is fixedly installed on one side of the fixed head 64. A spring tension gauge 8 is installed between the two hooks 7.

[0042] In use, after positioning and clamping, adjust the height of the equal-division clamping mechanism 3 according to the position of the cable to be clamped, start the double-head telescopic electric cylinder 62, and the two output ends of the double-head telescopic electric cylinder 62 extend simultaneously, synchronously driving the fixed head 64 and the connecting rod 65 on it to move apart, synchronously driving the limit slider 63 and the mounting rod 67 on it to move apart, and simultaneously driving the two equal-division clamping mechanisms 3 to move apart until the two equal-division clamping mechanisms 3 are adjusted to the appropriate position.

[0043] Please see Figure 2 , Figure 6 and Figure 7 The equal-division clamping mechanism 3 includes a fixed box 31, a clamping assembly 32, a limiting groove 33, a guide rail 34, and an equal-division assembly 35. The fixed box 31 is fixedly mounted on two mounting rods 67 at the same height. The limiting groove 33 is opened on the front side of the fixed box 31. The guide rail 34 and the equal-division assembly 35 are disposed inside the fixed box 31. The clamping assembly 32 is disposed on the equal-division assembly 35. The equal-division assembly 35 includes a fixed seat 351 fixedly mounted on one side of the bottom surface inside the fixed box 31. A servo motor 352 is fixedly mounted on the fixed seat 351. The servo motor 352 outputs... A lead screw 353 is fixedly connected to the end of the lead screw 353. A fixed block 355 is rotatably installed at the end of the lead screw 353 away from the servo motor 352. The fixed block 355 is fixedly set inside the bottom surface of the fixed box 31. A movable block 354 is threadedly connected to the lead screw 353 through a ball nut. Several guide sliders 358 are evenly slidably connected to the guide slide rail 34. A support plate 356 is fixedly installed on the rear side of the guide slider 358. A telescopic linkage group 357 is set on multiple support plates 356. The top of the movable block 354 is fixedly connected to the bottom of the support plate 356 on the side closer to the servo motor 352.

[0044] Please see Figure 6 , Figure 7 and Figure 8The clamping assembly 32 includes a side plate 321 fixedly connected to the top of the guide slider 358. A limit rod 320 is fixedly installed at the top center of the side plate 321. Two fixed rods 324 are symmetrically slidably installed on the limit rod 320. Two stop blocks 329 are fixedly connected to both ends of the limit rod 320. Two springs 322 are sleeved on the outside of the limit rod 320. The springs 322 are located between the fixed rods 324 and the stop blocks 329. Limit blocks 323 are fixedly installed at the top and bottom of the fixed rods 324. The limit blocks 323 have guide grooves that slide with the edge of the limit groove 33. One end of the fixed rod 324 is fixedly installed with... The device is equipped with a clamping plate 328. Several anti-slip strips 326 for increasing friction are evenly fixedly installed on the inner wall of the clamping plate 328. A guide groove 327 is opened on the front side of the clamping plate 328. Two reinforcing parts 325 are symmetrically arranged between the two clamping plates 328. The reinforcing part 325 includes a positioning pin 3251 fixedly installed on the clamping plate 328. A first stop block 3252 is fixedly installed at the end of the positioning pin 3251 away from the clamping plate 328. A second spring 3253 is arranged between the two positioning pins 3251 at the same height. Both ends of the second spring 3253 are provided with hanging rings, which are hung on the positioning pins 3251.

[0045] Once the overall position of the equal-division clamping mechanism 3 is adjusted to a suitable level, the position of the clamping component 32 is adjusted according to the cable spacing on the air switch. The servo motor 352 is activated, and its output drives the lead screw 353 to rotate, simultaneously moving the movable block 354 and its supporting plate 356 to the right. This, in turn, drives multiple guide sliders 358 to center via the telescopic linkage 357, simultaneously centering the clamping component 32 and reducing the distance between the clamping components 32. Reversing the servo motor 352 moves the movable block 354 and its supporting plate 356 to the left, causing the guide sliders 358 to move out of phase via the telescopic linkage 357, indirectly causing the clamping components 32 to move out of phase, thus increasing the distance between the clamping components 32. This facilitates adjustment based on the cable spacing of different air switch models. Once the distance is adjusted to a suitable level, pushing the handle 1 towards the air switch moves the clamping component 32 towards the air switch. The cable moves in the direction of the movement, guided by the guide groove 327. The clamping plate 328 and its fixing rod 324 move apart due to compression, compressing the first spring 322. At this time, the second spring 3253 is in a stretched state. When the cable moves into the clamping plate 328, the clamping plate 328 clamps and fixes the cable under the restoring force of the first spring 322 and the second spring 3253. The anti-slip strip 326 increases the friction between the cable and the clamping plate 328, preventing slippage during pulling. After clamping, the reading of the spring tension gauge 8 is recorded as the initial value. Then, the double-headed telescopic cylinder 62 is activated, and its two output ends extend synchronously, indirectly driving the equally spaced clamping mechanism 3 and the cable clamped thereon to move apart until the reading of the spring tension gauge 8 reaches the specified value. If the cable connector does not detach under the specified force, the cable connection quality is qualified; otherwise, it is unqualified.

[0046] It should be noted that when using this safety performance testing device for distribution cabinets, with the distribution cabinet in a energized state, simply open the cabinet door, hold the device, and start the infrared thermal imager 10. Use the infrared thermal imager 10 to perform thermal imaging scanning on the inside of the distribution cabinet to detect abnormal heating points. Abnormal heating points indicate an abnormality, especially at the wiring points of the air switch. If abnormal heating occurs at these points, it indicates a wiring problem, and the wiring needs to be rewired or the line repaired or replaced based on the test results.

[0047] When the distribution cabinet is de-energized, hold handle 1 and insert the positioning clamping plate 41 into the protruding part of the air switch. As it is inserted, the positioning clamping plate 41 and the anti-slip plate 42 move away from each other until they clamp and fix the protruding part of the air switch. The clamping and fixing of the equipment is achieved by the elastic force of the No. 3 spring 43. At this time, while keeping the positioning clamping plate 41 out of contact with the vertical section of the air switch, adjust the position of the clamping component 32 according to the cable spacing. Start the servo motor 352. The output end of the servo motor 352 drives the lead screw 353 to rotate, which simultaneously drives the movable block 354 and the support plate 356 on it to move to the right. Then, through the telescopic linkage group 357, multiple guide sliders 358 move to the center, which simultaneously drives the clamping component 32 to the center, realizing the reduction of the distance between the multiple clamping components 32. Reverse the servo motor 352, which drives the movable block 354 and the support plate 356 on it to move to the right. 56 moves to the left, and then through the telescopic linkage group 357, multiple guide sliders 358 move apart, indirectly driving multiple clamping components 32 to move apart, thus expanding the distance between the multiple clamping components 32. This is beneficial for adjusting the cable spacing according to different models of air switches. After adjusting to the appropriate position, continue to hold the handle 1 and insert the device towards the air switch until the positioning clamping plate 41 contacts the vertical section of the air switch. At this time, the clamping components 32 clamp and fix the cable. After the clamping is stable, start the double-head telescopic electric cylinder 62. The two output ends of the double-head telescopic electric cylinder 62 extend synchronously, indirectly driving the equally divided clamping mechanism 3 and the cable clamped on it to move apart until the reading of the spring tension gauge 8 reaches the specified value. At this time, if the cable joint still does not fall off under the force of the specified value, the surface cable wiring quality is qualified. Otherwise, it indicates that it is unqualified. If the cable wiring is unqualified, it is necessary to rewire or replace the wiring.

[0048] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A safety performance testing device for a power distribution cabinet, comprising a handle (1), characterized in that: A U-shaped frame (5) is fixedly installed on the front side of the handle (1). Fixing plates (13) are fixedly installed on both the upper and lower sides of the U-shaped frame (5). A positioning mechanism (4) for positioning and fixing is provided on the fixing plate (13). A pad (15) is installed on the rear side of each fixing plate (13). Also includes: Pulling mechanism (6) is provided on multiple pads (15); The equal-division clamping mechanism (3) is set on the pulling mechanism (6). The equal-division clamping mechanism (3) clamps and fixes the wiring of the air switch of the distribution cabinet. The pulling mechanism (6) drives the equal-division clamping mechanism (3) to move away from each other, so that the pulling mechanism (6) tests the firmness of the wiring of the air switch of the distribution cabinet. The positioning mechanism (4) includes guide rods (44) that are symmetrically fixed between two fixed plates (13). The two guide rods (44) slide through two positioning clamping plates (41). Anti-slip plates (42) are fixedly installed at the front end of the two positioning clamping plates (41) on the side close to each other. Pads (45) are fixedly installed at the rear end of the two positioning clamping plates (41) on the side close to each other. A No. 3 spring (43) is sleeved at both ends of the two guide rods (44). The No. 3 spring (43) is set between the fixed plate (13) and the positioning clamping plate (41). The pulling mechanism (6) includes a mounting base (61) fixedly installed in the middle of the front side of the U-shaped frame (5). A double-headed telescopic electric cylinder (62) is fixedly installed on the mounting base (61). The two output ends of the double-headed telescopic electric cylinder (62) respectively move through the clearance hole (14). A fixed head (64) is fixedly installed on the output end of the double-headed telescopic electric cylinder (62). Two symmetrical pads (15) are fixedly installed together with a limiting slide rail (66). Both ends of the limiting slide rail (66) are fixedly installed with baffles. Two limiting sliders (63) are slidably installed on each limiting slide rail (66). A connecting rod (65) is fixedly connected between the two limiting sliders (63) at the same height. A fixing head (64) is fixedly connected to the middle of the connecting rod (65). An installation rod (67) is fixedly connected to the side of the limiting slider (63) away from the connecting rod (65). A reinforcing rib (68) is fixedly connected between the installation rod (67) and the limiting slider (63). The equal-division clamping mechanism (3) includes a fixed box (31), a clamping component (32), a limiting groove (33), a guide rail (34), and an equal-division component (35). The fixed box (31) is fixedly installed on two mounting rods (67) at the same height. The limiting groove (33) is opened on the front side of the fixed box (31). The guide rail (34) and the equal-division component (35) are arranged inside the fixed box (31). The clamping component (32) is arranged on the equal-division component (35).

2. The safety performance testing device for a power distribution cabinet according to claim 1, characterized in that: The handle (1) is equipped with a battery pack (12) for power supply. An end cap (2) is provided on the rear side of the handle (1). A fixed arm (9) is fixedly connected to the middle right side of the U-shaped frame (5). A rotating pin (11) is rotatably installed on the end of the fixed arm (9) away from the U-shaped frame (5). An infrared thermal imager (10) is fixedly connected to the rotating pin (11). Two clearance holes (14) are symmetrically opened on the upper and lower sides of the U-shaped frame (5).

3. The safety performance testing device for a power distribution cabinet according to claim 1, characterized in that: A hook (7) is fixedly installed on one side of the fixed head (64), and a spring tension gauge (8) is installed between the two hooks (7).

4. The safety performance testing device for a power distribution cabinet according to claim 3, characterized in that: The equal-division component (35) includes a fixed seat (351) fixedly installed on one side of the bottom surface inside the fixed box (31). A servo motor (352) is fixedly installed on the fixed seat (351). A lead screw (353) is fixedly connected to the output end of the servo motor (352). A fixed block (355) is rotatably installed at the end of the lead screw (353) away from the servo motor (352). The fixed block (355) is set on the bottom surface inside the fixed box (31). A movable block (354) is threadedly connected to the lead screw (353) through a ball nut. Several guide sliders (358) are evenly slidably connected on the guide slide rail (34). A support plate (356) is fixedly installed on the rear side of the guide slider (358). A telescopic linkage group (357) is provided on multiple support plates (356). The top of the movable block (354) is fixedly connected to the bottom of the support plate (356) on the side closer to the servo motor (352).

5. The safety performance testing device for a power distribution cabinet according to claim 4, characterized in that: The clamping assembly (32) includes a side plate (321) fixedly connected to the top of the guide slider (358). A limit rod (320) is fixedly installed at the top center of the side plate (321). Two fixed rods (324) are symmetrically slidably installed on the limit rod (320). Two stop blocks (329) are fixedly connected to both ends of the limit rod (320). Two springs (322) are sleeved on the outside of the limit rod (320). The springs (322) are located on the fixed rod (324) and the stop blocks (329). Between the two clamping rods (324), a limiting block (323) is fixedly installed at the top and bottom. The limiting block (323) is provided with a guide groove that slides and connects with the edge of the limiting groove (33). A clamping plate (328) is fixedly installed at one end of the clamping rod (324). Several anti-slip strips (326) for increasing friction are evenly fixedly installed on the inner wall of the clamping plate (328). A guide groove (327) is provided on the front side of the clamping plate (328). Two reinforcing parts (325) are symmetrically arranged between the two clamping plates (328).

6. The safety performance testing device for a power distribution cabinet according to claim 5, characterized in that: The reinforcement part (325) includes a positioning pin (3251) fixedly installed on the clamping plate (328). A stop block (3252) is fixedly installed at one end of the positioning pin (3251) away from the clamping plate (328). A second spring (3253) is provided between the two positioning pins (3251) at the same height.

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