A safe electrical control cabinet

Abstract

An electrical control cabinet with safety features includes a cabinet body and a power-off self-locking device. The cabinet body has a door with a handle on one side. A limit trigger rod is located on the opposite side of the handle. The power-off self-locking device is fixedly installed on the side wall of the cabinet body near the door hinge. The power-off self-locking device corresponds to the limit trigger rod and includes a C-shaped bracket, a wedge-shaped limit rod, and a power-off button. The vertical plate of the C-shaped bracket is flush with the outer edge of the cabinet door side wall. The wedge-shaped limit rod and the power-off button are located within the groove of the C-shaped bracket, opposite to the limit trigger rod. The wedge-shaped limit rod limits the limit trigger rod, and when the power-off button is closed, it cuts off the main power supply to the electrical control cabinet. This design not only prevents the cabinet door from closing by cooperating with the limit trigger rod and the power-off self-locking device, but also cuts off the main power supply to the electrical control cabinet by triggering the power-off button through the limit trigger rod.

Description

Technical Field

[0001] This invention relates to an electrical control cabinet, and more particularly to a safe electrical control cabinet, specifically applicable to an electrical control cabinet that can limit and fix the cabinet door after it is opened and automatically cut off the power. Background Technology

[0002] An electrical control cabinet is a device that assembles switching equipment, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or panel according to electrical wiring requirements. It has a wide range of applications in the field of electrical connection.

[0003] After prolonged use, the internal electrical components of an electrical control cabinet may require maintenance due to aging or damage. To ensure safety, the electrical control cabinet must be powered off before any inspection or maintenance is carried out. Currently, this is usually done by manually or automatically switching the circuit on or off during maintenance.

[0004] Although this method allows for a simple and convenient way to disconnect the power to the electrical control cabinet during inspection and maintenance, it still has the following drawbacks:

[0005] 1. In actual work, due to the negligence of staff or the lack of vigilance of some new employees, they often forget to turn off the power switch before repairing the electrical control cabinet, which can lead to injury due to leakage of electrical components during maintenance.

[0006] 2. According to the electrical safety operation regulations, electricians must work in two people at the same time, with one person working and the other supervising. However, in actual work, this requirement is often not met. When working alone, the main power switch that has been disconnected may be accidentally operated by someone else, leading to safety hazards.

[0007] 3. Existing electrical control cabinet doors are generally flip-type. During maintenance, other employees may accidentally close the cabinet door while maintenance personnel are repairing the electrical components inside, which could cause injury to the personnel repairing the electrical components inside.

[0008] 4. Electrical control cabinets are equipped with ventilation windows to facilitate air convection for heat dissipation. To prevent dust from entering the electrical control cabinet and adhering to electrical components due to static electricity, dustproof plates are installed inside the ventilation windows. Existing dustproof plates are generally dust filters with an outer frame, which are fixed to the ventilation windows with bolts. This process takes a long time to disassemble and assemble during maintenance, affecting maintenance efficiency. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies that make it easy for workers to be electrocuted or pinched during maintenance, and to provide an electrical control cabinet that can limit and fix the cabinet door after it is opened and automatically cut off the power.

[0010] To achieve the above objectives, the technical solution of the present invention is:

[0011] A safe electrical control cabinet includes: a cabinet body and a power-off self-locking device; the cabinet body has an open door, a handle on one side of the door, and a limit trigger rod on the opposite side of the handle; a power-off self-locking device is fixedly installed on the side wall of the cabinet body near the door hinge, corresponding to the limit trigger rod; the power-off self-locking device includes a C-shaped bracket, a wedge-shaped limit rod, and a power-off button; the vertical plate of the C-shaped bracket is flush with the outer edge of the side wall of the door; the groove of the C-shaped bracket corresponds to the limit trigger rod; when the door is opened to its maximum angle, the limit trigger rod engages with the groove; the groove contains a wedge-shaped limit rod and a power-off button opposite to the limit trigger rod. The limiting rod includes a sleeve and a wedge-shaped rod. The sleeve is fixedly installed at the top of the opening end of the C-shaped bracket. The wedge-shaped rod passes through the top of the C-shaped bracket and is inserted into the sleeve. The wedge-shaped rod slides vertically against the top of the C-shaped bracket. A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod. The limiting trigger rod is driven by the wedge-shaped surface. The limiting trigger rod is limited by the wedge-shaped limiting rod. The limiting trigger rod is driven by the power-off button. When the power-off button is closed, the main power supply to the electrical control cabinet is cut off.

[0012] The top of the wedge rod is elastically engaged with the sleeve by a first spring. A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod, and a limiting plane is provided on the other side of the bottom of the wedge-shaped limiting rod. The wedge-shaped surface is provided corresponding to the limiting trigger rod, and the limiting plane is provided directly opposite the power-off button.

[0013] The electrical control cabinet also includes a limit triggering device, which is fixedly installed on the outside of the cabinet door. The limit triggering device is located near the door hinge of the cabinet door. The limit triggering device includes a limit triggering rod and a sliding sleeve. The sliding sleeve passes through the cabinet door and is connected to the cabinet door as a whole. The limit triggering rod passes through the sliding sleeve and slides horizontally with the sliding sleeve. The limit triggering rod is elastically engaged with the cabinet door by a spring.

[0014] The limiting trigger device includes a limiting trigger rod, a sliding sleeve, a T-shaped rod, a slider, a sliding groove plate, and a second spring. The sliding sleeve passes through the cabinet door and is integrated with it. The limiting trigger rod passes through the sliding sleeve and slides horizontally with it. The end of the limiting trigger rod is fixedly connected to the bottom of the vertical bar of the T-shaped rod. The T-shaped rod is positioned close to the cabinet body. One end of the horizontal bar of the T-shaped rod is fixedly connected to the slider. The slider is positioned within the groove of the sliding groove plate. The end of the sliding groove plate is fixedly connected to the inner side of the cabinet door. The end of the sliding groove plate is elastically engaged with the slider via the second spring.

[0015] A ventilation window is provided on each of the left and right side walls of the cabinet. A dustproof plate is installed in each of the two ventilation windows. The two dustproof plates are rotatably connected to the cabinet through a rotating shaft set on one side edge.

[0016] The rotating shafts on both dustproof plates are horizontally positioned at the bottom of the dustproof plates. A gear groove is provided in the middle of the bottom of the two dustproof plates, and a gear is provided in the middle of the rotating shafts on both dustproof plates. The gear is located in the gear groove.

[0017] The electrical control cabinet also includes a flip-up device, which includes an electric telescopic rod, a traction rod, and toothed plates. The electric telescopic rod passes vertically through the top of the cabinet and is fixedly connected to the cabinet. The telescopic end of the electric telescopic rod is located inside the cabinet. The telescopic end of the electric telescopic rod is fixedly connected to the middle of the traction rod. Each end of the traction rod has a toothed plate arranged vertically, and the two toothed plates mesh with gears on their corresponding sides. The telescopic signal input end of the electric telescopic rod is connected to the power-off button signal.

[0018] The dustproof plate includes a U-shaped frame and a honeycomb dustproof filter. The honeycomb dustproof filter is detachably installed inside the U-shaped frame and is inserted into the U-shaped frame through the opening. A rotating shaft is provided at the bottom of the U-shaped frame in the horizontal direction.

[0019] A dustproof strip is provided between the dustproof panel and the cabinet. The dustproof strip is fixedly installed at the inner edge of the ventilation window opened on the cabinet. The honeycomb dustproof filter is a honeycomb dustproof filter with a rigid outer frame.

[0020] The electrical control cabinet also includes a base, the top of which is fixedly connected to the bottom of the cabinet, and the base is made of insulating material.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention discloses a safe electrical control cabinet with a handle on one side of the cabinet door and a limit trigger rod on the other side. A power-off self-locking device is fixedly installed on the side wall of the cabinet near the door hinge, and the power-off self-locking device is positioned opposite the limit trigger rod. The power-off self-locking device includes a C-shaped bracket, a wedge-shaped limit rod, and a power-off button. The vertical plate of the C-shaped bracket is flush with the outer edge of the cabinet door side wall. A wedge-shaped limit rod that can slide up and down is provided at the groove opening of the C-shaped bracket. A power-off button is provided on the vertical plate of the C-shaped bracket. When the cabinet door is opened, the limit trigger rod first pushes the wedge-shaped limit rod upward and then enters the groove of the C-shaped bracket. At this time, one side of the limit trigger rod triggers the power-off button to cut off the main power supply of the electrical control cabinet. At the same time, the other side of the limit trigger rod engages with the wedge-shaped limit rod for limiting. Therefore, this design can use a limit trigger rod and a power-off self-locking device to limit the limit trigger rod when the cabinet door is opened, preventing the cabinet door from closing. At the same time, the limit trigger rod can trigger the power-off button to cut off the main power supply of the electrical control cabinet, effectively improving the safety of the electrical control cabinet.

[0023] 2. This invention discloses a limit trigger device for a safe electrical control cabinet, which is fixedly installed on the outside of the cabinet door. A sliding plate within the limit trigger device is fixed to the back of the cabinet door. The sliding plate is elastically connected to a slider via a second spring. A T-shaped rod is fixed to the slider, and the bottom of the T-shaped rod is fixedly connected to the end of the limit trigger rod. When the cabinet door is stopped by a wedge-shaped limit rod, the operator can press the limit trigger rod. At this time, the second spring is compressed, shortening the length of the limit trigger rod outside the cabinet door. When the limit trigger rod continues to shorten until it disengages from the wedge-shaped limit rod, the cabinet door can be closed. Therefore, this design, through the elastic cooperation between the limit trigger rod and the sliding plate, allows the cabinet door to be conveniently closed when needed, effectively improving the ease of use of the electrical control cabinet.

[0024] 3. This invention discloses a safe electrical control cabinet with ventilation windows on both the left and right side walls. Each ventilation window contains a dustproof plate, which is rotatably connected to the cabinet via a rotating shaft at its bottom. A gear is fixed in the middle of the rotating shaft, meshing with a gear plate. The gear plate moves up and down via an electric telescopic rod. When the electric telescopic rod is shortened, the ventilation window opens outwards; when the electric telescopic rod is extended, the ventilation window closes inwards. The dustproof plate includes a U-shaped frame and a honeycomb dust filter. The honeycomb dust filter is detachably installed within the U-shaped frame. Therefore, this design allows for control of the dustproof plate's opening and closing via the electric telescopic rod. When the dustproof plate opens outwards, the operator can easily pull out the honeycomb dust filter, saving time on disassembling the dustproof plate and effectively shortening maintenance time.

[0025] 4. In this invention, a dustproof strip is installed between the dustproof panel and the cabinet body in a safe electrical control cabinet. The electrical control cabinet also includes a base, the top of which is fixedly connected to the bottom of the cabinet body. The base is made of insulating material, making it difficult for dust to enter the electrical control cabinet during use. Simultaneously, the base improves the insulation performance of the electrical control cabinet. Therefore, this design effectively extends the maintenance cycle of the electrical control cabinet and reduces maintenance costs by preventing dust from entering the electrical control cabinet through the dustproof strip and improving the insulation performance of the electrical control cabinet through the base. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 yes Figure 1 A schematic diagram of the power interruption self-locking device.

[0028] Figure 3 yes Figure 1 A schematic diagram of the middle wedge rod.

[0029] Figure 4 yes Figure 1 A schematic diagram of the middle limit trigger device.

[0030] Figure 5 yes Figure 1 A schematic diagram of the structure of the middle sliding plate.

[0031] Figure 6 yes Figure 1 A schematic diagram of the self-locking device for power interruption in operation.

[0032] Figure 7 yes Figure 1 A schematic diagram of the structure of the middle flap device.

[0033] Figure 8 yes Figure 7 A schematic diagram of the structure of the dustproof panel.

[0034] In the diagram: Cabinet 1, Cabinet door 11, Power-off self-locking device 2, C-shaped bracket 21, Wedge-shaped limit rod 22, Power-off button 23, Groove 24, Sleeve 25, Wedge rod 26, Limit triggering device 3, Limit triggering rod 31, Sliding sleeve 32, T-shaped rod 33, Sliding block 34, Slide plate 35, Second spring 36, Dustproof plate 4, U-shaped frame 41, Honeycomb dustproof filter 42, Gear 43, Rotating shaft 44, Dustproof rubber strip 45, Flip-up device 5, Electric telescopic rod 51, Traction rod 52, Tooth plate 53, Base 6. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1 to 8 The electrical control cabinet includes: a cabinet body 1 and a power-off self-locking device 2; the cabinet body 1 has a cabinet door 11 on its open side, a handle on one side of the cabinet door 11, and a limit trigger rod 31 on the opposite side of the handle on the cabinet door 11; the power-off self-locking device 2 is fixedly installed on the side wall of the cabinet body 1 near the door hinge of the cabinet door 11, and the power-off self-locking device 2 is correspondingly arranged with the limit trigger rod 31; the power-off self-locking device 2 includes a C-shaped bracket 21, a wedge-shaped limit rod 22, and a power-off button 23; the vertical plate of the C-shaped bracket 21 is flush with the outer edge of the side wall of the cabinet door 11; the groove 24 of the C-shaped bracket 21 is corresponding to the limit trigger rod 31; when the cabinet door 11 is opened to its maximum angle, the limit trigger rod 31 is inserted into the groove 24; the groove 24 contains the wedge-shaped limit rod 22 and the power-off button 23, which are opposite to the limit trigger rod 31. The wedge-shaped limiting rod 22 includes a sleeve 25 and a wedge-shaped rod 26. The sleeve 25 is fixedly installed at the top of the open end of the C-shaped bracket 21. The wedge-shaped rod 26 passes through the top of the C-shaped bracket 21 and is inserted into the sleeve 25. The wedge-shaped rod 26 slides vertically with the top of the C-shaped bracket 21. A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod 22. The limiting trigger rod 31 is in a driving engagement with the wedge-shaped surface. The limiting trigger rod 31 is in a limiting engagement with the wedge-shaped limiting rod 22. The limiting trigger rod 31 is in a driving engagement with the power-off button 23. When the power-off button 23 is closed, the main power supply to the electrical control cabinet is cut off.

[0037] The top of the wedge rod 26 is elastically engaged with the sleeve 25 by a first spring. A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod 22, and a limiting plane is provided on the other side of the bottom of the wedge-shaped limiting rod 22. The wedge-shaped surface is provided in relation to the limiting trigger rod 31, and the limiting plane is provided in relation to the power-off button 23.

[0038] The electrical control cabinet also includes a limit trigger device 3, which is fixedly installed on the outside of the cabinet door 11. The limit trigger device 3 is located near the door hinge of the cabinet door 11. The limit trigger device 3 includes a limit trigger rod 31 and a sliding sleeve 32. The sliding sleeve 32 passes through the cabinet door 11 and is connected to the cabinet door 11 as a whole. The limit trigger rod 31 passes through the sliding sleeve 32 and slides in a horizontal direction with the sliding sleeve 32. The limit trigger rod 31 is elastically engaged with the cabinet door 11 by a spring.

[0039] The limiting trigger device 3 includes a limiting trigger rod 31, a sliding sleeve 32, a T-shaped rod 33, a slider 34, a sliding groove plate 35, and a second spring 36. The sliding sleeve 32 passes through the cabinet door 11 and is connected to the cabinet door 11 as a whole. The limiting trigger rod 31 passes through the sliding sleeve 32 and slides horizontally with the sliding sleeve 32. The end of the limiting trigger rod 31 is fixedly connected to the bottom of the vertical rod of the T-shaped rod 33. The T-shaped rod 33 is located near the cabinet body 1. One end of the horizontal rod of the T-shaped rod 33 is fixedly connected to the slider 34. The slider 34 is located in the groove of the sliding groove plate 35. The end of the sliding groove plate 35 is fixedly connected to the inner side of the cabinet door 11. The end of the sliding groove plate 35 is elastically engaged with the slider 34 through the second spring 36.

[0040] The cabinet 1 has a ventilation window on each of its left and right side walls. Each ventilation window has a dustproof plate 4 installed inside it. Both dustproof plates 4 are rotatably connected to the cabinet 1 through a rotating shaft 44 set on one side edge.

[0041] The rotating shafts 44 on both dustproof plates 4 are arranged horizontally at the bottom of the dustproof plates 4. A gear groove is provided in the middle of the bottom of the two dustproof plates 4. A gear 43 is provided in the middle of the rotating shafts 44 on both dustproof plates 4. The gear 43 is located in the gear groove.

[0042] The electrical control cabinet also includes a flip-up device 5, which includes an electric telescopic rod 51, a traction rod 52, and a toothed plate 53. The electric telescopic rod 51 passes vertically through the top of the cabinet 1 and is fixedly connected to the cabinet 1. The telescopic end of the electric telescopic rod 51 is located inside the cabinet 1. The telescopic end of the electric telescopic rod 51 is fixedly connected to the middle of the traction rod 52. A toothed plate 53 is provided at each end of the traction rod 52 in the vertical direction. The two toothed plates 53 mesh with the gears 43 on their corresponding sides. The telescopic signal input end of the electric telescopic rod 51 is connected to the power-off button 23.

[0043] The dustproof plate 4 includes a U-shaped frame 41 and a honeycomb dustproof filter 42. The honeycomb dustproof filter 42 is detachably installed inside the U-shaped frame 41. The honeycomb dustproof filter 42 is inserted into the U-shaped frame 41 through the opening. A rotating shaft 44 is provided at the bottom of the U-shaped frame 41 in the horizontal direction.

[0044] A dustproof strip 45 is provided between the dustproof panel 4 and the cabinet 1. The dustproof strip 45 is fixedly installed at the inner edge of the ventilation window opened on the cabinet 1. The honeycomb dustproof filter 42 is a honeycomb dustproof filter with a rigid outer frame.

[0045] The electrical control cabinet also includes a base 6, the top of which is fixedly connected to the bottom of the cabinet 1, and the base 6 is made of insulating material.

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

[0047] During maintenance, when the operator opens the cabinet door 11, the limit trigger rod 31 on the cabinet door 11 first contacts the wedge-shaped surface of the wedge-shaped limit rod 22. The cabinet door 11 is then rotated further, causing the limit trigger rod 31 to push the wedge-shaped limit rod 22 upward. The limit trigger rod 31 then enters the C-shaped bracket 21. At this time, one side of the limit trigger rod 31 triggers the power-off button 23, causing the main power supply of the electrical control cabinet to be cut off. The other side of the limit trigger rod 31 is limited by the plane of the wedge-shaped limit rod 22, preventing the cabinet door 11 from closing.

[0048] When it is necessary to close the cabinet door 11, the operator presses the limit trigger rod 31. At this time, the limit trigger rod 31 drives the T-shaped rod 33 and the slider 34 to move inward towards the inside of the cabinet door, causing the second spring 36 to compress. After the limit trigger rod 31 continues to shorten, it disengages from the wedge-shaped limit rod 22. At this time, the wedge-shaped limit rod 22 can no longer limit the limit trigger rod 31, and the cabinet door 11 can be closed. Example

[0049] A safe electrical control cabinet includes a cabinet body 1 and a power-off self-locking device 2. The cabinet body 1 has an open door 11 with a handle on one side. A limit trigger rod 31 is located on the opposite side of the handle on the door 11. The power-off self-locking device 2 is fixedly installed on the side wall of the cabinet body 1 near the hinge of the door 11. The power-off self-locking device 2 corresponds to the limit trigger rod 31. The power-off self-locking device 2 includes a C-shaped bracket 21, a wedge-shaped limit rod 22, and a power-off button 23. The vertical plate of the C-shaped bracket 21 is flush with the outer edge of the side wall of the door 11. A groove 24 of the C-shaped bracket 21 corresponds to the limit trigger rod 31. When the door 11 is opened to its maximum angle, the limit trigger rod 31 engages with the groove 24. The groove 24 contains a limit trigger rod 31. The wedge-shaped limiting rod 22 and the power-off button 23 are opposite to the trigger rod 31. The wedge-shaped limiting rod 22 includes a sleeve 25 and a wedge-shaped rod 26. The sleeve 25 is fixedly installed at the top of the open end of the C-shaped bracket 21. The wedge-shaped rod 26 passes through the top of the C-shaped bracket 21 and is inserted into the sleeve 25. The wedge-shaped rod 26 slides vertically with the top of the C-shaped bracket 21. A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod 22. The limiting trigger rod 31 is in transmission engagement with the wedge-shaped surface. The limiting trigger rod 31 and the wedge-shaped limiting rod... 22. Limiting engagement: The limit trigger rod 31 engages with the power-off button 23, cutting off the main power supply to the electrical control cabinet when the power-off button 23 is closed; the top of the wedge rod 26 is elastically engaged with the sleeve 25 via a first spring; one side of the bottom of the wedge-shaped limit rod 22 is provided with a wedge-shaped surface, and the other side of the bottom of the wedge-shaped limit rod 22 is provided with a limiting plane; the wedge-shaped surface is provided corresponding to the limit trigger rod 31, and the limiting plane is provided directly opposite the power-off button 23; the electrical control cabinet also includes a limit trigger device 3, the limit trigger device 3... Fixedly installed on the outside of the cabinet door 11, the limit triggering device 3 is located near the door hinge of the cabinet door 11. The limit triggering device 3 includes a limit triggering rod 31 and a sliding sleeve 32. The sliding sleeve 32 passes through the cabinet door 11 and is connected to the cabinet door 11 as a whole. The limit triggering rod 31 passes through the sliding sleeve 32 and slides horizontally with the sliding sleeve 32. The limit triggering rod 31 is elastically engaged with the cabinet door 11 by a spring. The limit triggering device 3 includes a limit triggering rod 31, a sliding sleeve 32, a T-shaped rod 33, a slider 34, a sliding groove plate 35, and a second spring 36.The sliding sleeve 32 passes through the cabinet door 11 and is integrated with it. The limiting trigger rod 31 passes through the sliding sleeve 32 and slides horizontally with it. The end of the limiting trigger rod 31 is fixedly connected to the bottom of the vertical rod of the T-shaped rod 33. The T-shaped rod 33 is located near the cabinet body 1. One end of the horizontal rod of the T-shaped rod 33 is fixedly connected to the slider 34. The slider 34 is located in the groove of the sliding plate 35. The end of the sliding plate 35 is fixedly connected to the inner side of the cabinet door 11. The end of the sliding plate 35 is connected to the second... Spring 36 and slider 34 are elastically engaged; each of the left and right side walls of the cabinet 1 has a ventilation window, and each ventilation window contains a dustproof plate 4. Both dustproof plates 4 are rotatably engaged with the cabinet 1 via a rotating shaft 44 located on one side edge; the rotating shafts 44 on both dustproof plates 4 are horizontally positioned at the bottom of the dustproof plates 4, and a gear groove is located in the middle of the bottom of each dustproof plate 4. A gear 43 is located in the middle of the rotating shafts 44 on both dustproof plates 4, and the gear 43 is positioned within the gear groove. Example

[0050] Example 2 is basically the same as Example 1, except that:

[0051] The electrical control cabinet also includes a flip-up device 5, which comprises an electric telescopic rod 51, a traction rod 52, and toothed plates 53. The electric telescopic rod 51 passes vertically through the top of the cabinet 1 and is fixedly connected to the cabinet 1. The telescopic end of the electric telescopic rod 51 is located inside the cabinet 1. The telescopic end of the electric telescopic rod 51 is fixedly connected to the middle of the traction rod 52. Each end of the traction rod 52 has a toothed plate 53 vertically arranged on it, and the two toothed plates 53 mesh with the gears 43 on their corresponding sides. The telescopic signal input terminal of the electric telescopic rod 51 is connected to the power-off button. 23 Signal connection; The dustproof panel 4 includes a U-shaped frame 41 and a honeycomb dustproof filter 42. The honeycomb dustproof filter 42 is detachably installed inside the U-shaped frame 41. The honeycomb dustproof filter 42 is inserted into the U-shaped frame 41 through the opening. A rotating shaft 44 is provided at the bottom of the U-shaped frame 41 in a horizontal direction. A dustproof strip 45 is provided between the dustproof panel 4 and the cabinet 1. The dustproof strip 45 is fixedly installed at the inner edge of the ventilation window opened on the cabinet 1. The honeycomb dustproof filter 42 is a honeycomb dustproof filter with a rigid outer frame. Example

[0052] Example 3 is basically the same as Example 2, except that:

[0053] The electrical control cabinet also includes a base 6, the top of which is fixedly connected to the bottom of the cabinet 1, and the base 6 is made of insulating material.

Claims

1. A safe electrical control cabinet, characterized in that: The electrical control cabinet includes: a cabinet body (1) and a power-off self-locking device (2); the cabinet body (1) has an opening side with a cabinet door (11), a handle is provided on one side of the cabinet door (11), and a limit trigger rod (31) is provided on the opposite side of the handle on the cabinet door (11). A power-off self-locking device (2) is fixedly installed on the side wall near the hinge of the cabinet door (11) on the cabinet body (1). The power-off self-locking device (2) is correspondingly set with the limit trigger rod (31). The power-off self-locking device (2) includes a C-shaped bracket (21), a wedge-shaped limit rod (22), and a power-off button (23). The vertical plate of the C-shaped bracket (21) is flush with the outer edge of the side wall of the cabinet door (11). The groove (24) of the C-shaped bracket (21) is set with respect to the limit trigger rod (31). When the cabinet door (11) is opened to the maximum angle, the limit trigger rod (31) and the groove (24) are inserted and engaged. The groove (24) is provided with a wedge-shaped limit rod (22) and a power-off button (23) opposite to the limit trigger rod (31). The wedge-shaped limiting rod (22) includes a sleeve (25) and a wedge-shaped rod (26). The sleeve (25) is fixedly installed at the top of the opening end of the C-shaped bracket (21). The wedge-shaped rod (26) passes through the top of the C-shaped bracket (21) and is inserted into the sleeve (25). The wedge-shaped rod (26) slides in the vertical direction with the top of the C-shaped bracket (21). A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod (22). The limiting trigger rod (31) is driven in conjunction with the wedge-shaped surface. The limiting trigger rod (31) is limited in conjunction with the wedge-shaped limiting rod (22). The limiting trigger rod (31) is driven in conjunction with the power-off button (23). When the power-off button (23) is closed, the main power supply of the electrical control cabinet is cut off.

2. The safe electrical control cabinet according to claim 1, characterized in that: The top of the wedge rod (26) is elastically engaged with the sleeve (25) by a first spring. A wedge-shaped surface is provided on one side of the bottom of the wedge-shaped limiting rod (22), and a limiting plane is provided on the other side of the bottom of the wedge-shaped limiting rod (22). The wedge-shaped surface is provided in relation to the limiting trigger rod (31), and the limiting plane is provided in relation to the power off button (23).

3. The safe electrical control cabinet according to claim 1, characterized in that: The electrical control cabinet also includes a limit trigger device (3), which is fixedly installed on the outside of the cabinet door (11). The limit trigger device (3) is located near the door hinge of the cabinet door (11). The limit trigger device (3) includes a limit trigger rod (31) and a sliding sleeve (32). The sliding sleeve (32) passes through the cabinet door (11) and is connected to the cabinet door (11) as a whole. The limit trigger rod (31) passes through the sliding sleeve (32) and slides in a horizontal direction with the sliding sleeve (32). The limit trigger rod (31) is elastically engaged with the cabinet door (11) by a spring.

4. A safe electrical control cabinet according to claim 3, characterized in that: The limiting trigger device (3) includes a limiting trigger rod (31), a sliding sleeve (32), a T-shaped rod (33), a slider (34), a sliding groove plate (35), and a second spring (36). The sliding sleeve (32) passes through the cabinet door (11) and is connected to the cabinet door (11) as a whole. The limiting trigger rod (31) passes through the sliding sleeve (32) and slides in a horizontal direction with the sliding sleeve (32). The end of the limiting trigger rod (31) is fixedly connected to the bottom of the vertical rod of the T-shaped rod (33). The T-shaped rod (33) is set near the cabinet body (1). One end of the horizontal rod of the T-shaped rod (33) is fixedly connected to the slider (34). The slider (34) is set in the sliding groove of the sliding groove plate (35). The end of the sliding groove plate (35) is fixedly connected to the inner side of the cabinet door (11). The end of the sliding groove plate (35) is elastically engaged with the slider (34) through the second spring (36).

5. A safe electrical control cabinet according to any one of claims 1 to 4, characterized in that: The cabinet (1) has a ventilation window on each of its left and right side walls. Each ventilation window has a dustproof plate (4). Both dustproof plates (4) are rotated with the cabinet (1) through a rotating shaft (44) on one side edge.

6. A safe electrical control cabinet according to claim 5, characterized in that: The rotating shafts (44) on the two dustproof plates (4) are both set horizontally at the bottom of the dustproof plates (4). A gear groove is opened in the middle of the bottom of the two dustproof plates (4). A gear (43) is set in the middle of the rotating shafts (44) on the two dustproof plates (4). The gear (43) is set in the gear groove.

7. A safe electrical control cabinet according to claim 6, characterized in that: The electrical control cabinet also includes a flip-up device (5), which includes an electric telescopic rod (51), a traction rod (52), and a toothed plate (53). The electric telescopic rod (51) passes through the top of the cabinet (1) in a vertical direction and is fixedly connected to the cabinet (1). The telescopic end of the electric telescopic rod (51) is located inside the cabinet (1). The telescopic end of the electric telescopic rod (51) is fixedly connected to the middle of the traction rod (52). A toothed plate (53) is provided at each end of the traction rod (52) in a vertical direction. The two toothed plates (53) mesh with the gears (43) on their corresponding sides. The telescopic signal input end of the electric telescopic rod (51) is connected to the power-off button (23).

8. A safe electrical control cabinet according to claim 7, characterized in that: The dustproof plate (4) includes a U-shaped frame (41) and a honeycomb dustproof filter (42). The honeycomb dustproof filter (42) is detachably installed inside the U-shaped frame (41). The honeycomb dustproof filter (42) is inserted into the U-shaped frame (41) through the opening of the U-shaped frame (41). The bottom of the U-shaped frame (41) is provided with a rotating shaft (44) in the horizontal direction.

9. A safe electrical control cabinet according to claim 8, characterized in that: A dustproof strip (45) is provided between the dustproof panel (4) and the cabinet (1). The dustproof strip (45) is fixedly installed at the inner edge of the ventilation window opened on the cabinet (1). The honeycomb dustproof filter (42) is a honeycomb dustproof filter with a rigid outer frame.

10. A safe electrical control cabinet according to claim 1, characterized in that: The electrical control cabinet also includes a base (6), the top of which is fixedly connected to the bottom of the cabinet (1), and the base (6) is made of insulating material.

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