Power distribution cabinet with active protection function

Abstract

The invention discloses a power distribution cabinet with an active protection function, and relates to the technical field of power distribution cabinets, and the power distribution cabinet with the active protection function comprises a machine body, and also comprises an anti-theft device, a cutoff device and a heat dissipation device; wherein the front part of the machine body is rotationally connected with a cabinet door; the anti-theft device comprises a handle, a connecting column, a shifting rod, a concentric-square-shaped frame, a connecting plate, a pneumatic telescopic rod, a push plate, an air pipe, an inflating device, a baffle and a long plate, the connecting column rotationally penetrates through the cabinet door, the handle is fixedly connected to the front end of the connecting column, the long plate is fixedly connected to the rear end of the connecting column, and the shifting rod is fixedly connected to the face, away from the cabinet door, of the long plate. According to the device, when the free end of the pneumatic telescopic rod extends out, the push plate and the baffle plate can fix the long plate, and when the long plate is fixed, the handle cannot be pressed, so that the power distribution cabinet is prevented from being illegally opened by a person or the door of the power distribution cabinet is prevented from being accidentally opened by a child due to playing.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution cabinets, and specifically relates to a distribution cabinet with an active protection function. Background Art

[0002] Distribution cabinets with active protection functions are of great significance in modern power systems. With the increase in power demand and the complexity of the power consumption environment, the safety risks and failure probabilities faced by power distribution equipment also increase.

[0003] The patent with the patent announcement number CN214506090U relates to a distribution cabinet with a protection function, including a distribution cabinet and a protection box body. The distribution cabinet is placed inside the protection box body. Among them, a box top is installed on the upper part of the protection box body. The box top is set as an inclined plane, and a cavity is formed between the box top and the upper end face of the box body. And the box top includes a fire extinguishing mechanism. A plurality of fire alarms are installed on the outer side of the protection box body. By setting fire alarms and a fire extinguishing mechanism outside the distribution cabinet, when a fire occurs around the distribution cabinet, it can alarm in time and spray fire extinguishing agent through the fire extinguishing mechanism to prevent the flame from spreading and affecting the distribution cabinet, thereby reducing property losses and effectively preventing the normal operation of the distribution box from being affected by the fire. In the above patent, when a fire occurs around the distribution cabinet, it can alarm in time and spray fire extinguishing agent through the fire extinguishing mechanism to prevent the flame from spreading and affecting the distribution cabinet, thereby reducing property losses and effectively preventing the normal operation of the distribution box from being affected by the fire. However, the location of the distribution cabinet is in the streets and alleys, and there may be a situation where children playing pull the cabinet door of the distribution cabinet, causing the cabinet door to open and resulting in electric shock to children. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a distribution cabinet with an active protection function, which solves the problems raised in the above background art.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions: A power distribution cabinet with an active protection function includes a body, and also includes an anti-theft device, a current interruption device, and a heat dissipation device; wherein, a cabinet door is rotatably connected to the front of the body; the anti-theft device includes a handle, a connecting column, a lever, a loop-shaped frame, a connecting plate, a pneumatic telescopic rod, a push plate, an air pipe, an air injection device, a baffle, and a long plate. The connecting column rotatably penetrates through the cabinet door, the handle is fixedly connected to the front end of the connecting column, the long plate is fixedly connected to the rear end of the connecting column, the lever is fixedly connected to the side of the long plate away from the cabinet door, the loop-shaped frame is fixedly connected to the inner right wall of the body, the fixed end of the pneumatic telescopic rod is fixedly connected to the top surface of the inner wall of the loop-shaped frame, the push plate is fixedly connected to the free end of the pneumatic telescopic rod, the connecting plate is fixedly connected to the top of the loop-shaped frame, the top of the air pipe is fixedly connected to the bottom of the connecting plate, the side of the air injection device close to the cabinet door is fixedly connected to the inner front wall of the body, the bottom of the air pipe is fixedly connected to the top of the air injection device, and the baffle is fixedly connected to the inner front wall of the body.

[0006] According to the above technical solution, the bottom of the push plate contacts the top of the long plate, and the bottom of the long plate contacts the top of the baffle.

[0007] According to the above technical solution, the back of the air injection device contacts the side of the long plate close to the cabinet door, and an air passage is provided inside the connecting plate.

[0008] According to the above technical solution, the current interruption device includes a current interrupter, a support block 1, a spring 1, a rotating rod, a cross plate 1, a support column, a cross plate 2, a current interruption switch, a micro motor, and a timing switch. The current interrupter is fixedly connected to the inner right wall of the body, the current interruption switch is rotatably connected to the left side of the current interrupter, the support block 1 is fixedly connected to the inner right wall of the body, the top of the spring 1 is fixedly connected to the top of the long groove, the cross plate 2 is slidably installed inside the support block 1, the cross plate 2 is fixedly connected to the bottom of the spring 1, the support column is fixedly connected to the top of the cross plate 2, the cross plate 1 is fixedly connected to the top of the support column, the micro motor is fixedly connected to the side of the support block 1 away from the cabinet door, the timing switch is rotatably connected to the left side of the micro motor, and the top of the rotating rod is fixedly connected to the output end of the micro motor.

[0009] According to the above technical solution, the lever contacts the bottom of the current interruption switch, the support block 1 is provided with a long groove, and the bottom of the cross plate 2 contacts the top of the current interruption switch.

[0010] According to the above technical solution, the current interruption switch is electrically connected to the current interrupter, the timing switch is electrically connected to the micro motor, the bottom of the rotating rod contacts the top of the cross plate 1, and the end of the cross plate 1 away from the cabinet door contacts the timing switch.

[0011] According to the above technical solution, the heat dissipation device includes a fan device, a fan blade, a wire, a sliding rheostat, a second spring, a vertical plate, a Z-shaped rod, a support plate, a push block, an inclined block, a second support block, a bimetallic strip, a slider, and a sliding rod. The fan device is rotatably connected to the right inner wall of the machine body. The fan blade is fixedly connected to the circumferential surface of the fan device. The wire is fixedly connected to the right inner wall of the machine body. The sliding rheostat is fixedly connected to the right inner wall of the machine body. The sliding rod is fixedly installed inside the sliding rheostat. The slider is slidably installed on the circumferential surface of the sliding rod. The second spring is fixedly installed between the slider and the sliding rheostat. The second support block is fixedly connected to the right inner wall of the machine body. The bottom of the bimetallic strip is fixedly connected to the top of the second support block. The vertical plate is fixedly connected to the top of the slider. The support plate is fixedly connected to the right inner wall of the machine body. The Z-shaped rod slidably penetrates the support plate. The end of the Z-shaped rod away from the cabinet door is fixedly connected to the surface of the vertical plate close to the first support block. The push block is fixedly connected to the end of the Z-shaped rod close to the cabinet door. The inclined block is fixedly connected to the top of the first cross plate.

[0012] According to the above technical solution, the wire is electrically connected to the fan device and the sliding rheostat. The slider is slidably connected to the circumferential surface of the sliding rod. The inclined surface of the inclined block contacts the bottom of the push block.

[0013] The present invention provides a power distribution cabinet with an active protection function. It has the following beneficial effects: (1) In this invention, the cabinet door can be opened by inserting a key. When someone tries to illegally open the cabinet door of the power distribution cabinet, the pneumatic telescopic rod can be inflated by shaking the cabinet door. At this time, the free end of the pneumatic telescopic rod will extend. When the free end of the pneumatic telescopic rod extends, the push plate and the baffle will fix the long plate. When the long plate is fixed, the handle cannot be pressed, thus preventing someone from illegally opening the power distribution cabinet or preventing children from accidentally opening the cabinet door of the power distribution cabinet and causing harm.

[0014] (2) In this invention, when a trip occurs, the current-breaking switch will move upward. After the current-breaking switch moves upward, the first cross plate will contact the timing switch. When the first cross plate contacts the timing switch, the timing switch will start timing. When the timing is completed, the timing switch will drive the output end of the micro motor to rotate one week. When the output end of the micro motor rotates one week, the current-breaking switch will be pushed downward by the rotating rod. At this time, the electronic components in the power distribution cabinet will re-inflow with current. When a trip occurs, there is no need to manually push. When the cabinet door of the power distribution cabinet is opened, the toggle lever contacts the current-breaking switch, which will cut off the power supply of the power distribution cabinet, effectively preventing the staff from accidentally touching the electronic components in the power distribution cabinet and being injured.

[0015] (3) In this invention, when the temperature inside the power distribution cabinet rises, the bending angle of the bimetal sheet will become larger. At this time, the bimetal sheet will push the slider to the left, and then the fan blades will increase the air volume. When the temperature inside the power distribution cabinet drops, the bending angle of the bimetal sheet will become smaller, and then the slider will move to the right to reduce the air volume. This device can adjust the air volume automatically according to the temperature, effectively reducing power consumption. When someone opens the cabinet door or the circuit breaker trips and cuts off the power, at this time, the electronic components inside the power distribution cabinet are not working, so there is no need for heat dissipation. At this time, when the inclined block contacts the push block, it will cause the slider to move to the right and the fan blades to stop rotating, which can effectively reduce power consumption and costs. Description of the Drawings

[0016] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 Schematic diagram of the position structure of the anti-theft device of the present invention; Figure 4 Schematic diagram of the structure of the current-breaking device of the present invention; Figure 5 Schematic diagram of the position structure of the anti-theft device, current-breaking device and heat dissipation device of the present invention; Figure 6 Schematic diagram of the position structure of the current-breaking device and heat dissipation device of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the position structure of part A in the present invention.

[0017] In the figure: 1, body; 2, cabinet door; 31, handle; 32, connecting column; 33, lever; 34, wire frame; 35, connecting plate; 36, pneumatic telescopic rod; 37, push plate; 38, air pipe; 39, air pumping device; 310, baffle; 311, long plate; 41, circuit breaker; 42, support block 1; 43, spring 1; 44, rotating rod; 45, cross plate 1; 46, support column; 47, cross plate 2; 48, current-breaking switch; 49, micro motor; 410, timing switch; 51, fan device; 52, fan blades; 53, wire; 54, sliding rheostat; 55, spring 2; 56, vertical plate; 57, Z-shaped rod; 58, support plate; 59, push block; 510, inclined block; 511, support block 2; 512, bimetal sheet; 513, slider; 514, sliding rod. Detailed Implementation Modes

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 - 7 , an embodiment of the present invention is: a power distribution cabinet with an active protection function, including a body 1 and further including an anti-theft device; wherein, a cabinet door 2 is rotatably connected to the front of the body 1; the anti-theft device includes a handle 31, a connecting column 32, a lever 33, a return frame 34, a connecting plate 35, a pneumatic telescopic rod 36, a push plate 37, an air pipe 38, an air injection device 39, a baffle 310 and a long plate 311. The connecting column 32 rotatably penetrates through the cabinet door 2, the handle 31 is fixedly connected to the front end of the connecting column 32, the long plate 311 is fixedly connected to the rear end of the connecting column 32, the lever 33 is fixedly connected to the side of the long plate 311 away from the cabinet door 2, the return frame 34 is fixedly connected to the inner right wall of the body 1, the fixed end of the pneumatic telescopic rod 36 is fixedly connected to the top surface of the inner wall of the return frame 34, the push plate 37 is fixedly connected to the free end of the pneumatic telescopic rod 36, the connecting plate 35 is fixedly connected to the top of the return frame 34, the top of the air pipe 38 is fixedly connected to the bottom of the connecting plate 35, the air injection device 39 is fixedly connected to the inner front wall of the body 1 near the cabinet door 2, the bottom of the air pipe 38 is fixedly connected to the top of the air injection device 39, the baffle 310 is fixedly connected to the inner front wall of the body 1. When the free end of the pneumatic telescopic rod 36 extends, the push plate 37 and the baffle 310 will fix the long plate 311. When the long plate 311 is fixed, the handle 31 cannot be pressed, thereby preventing someone from illegally opening the power distribution cabinet or preventing children from accidentally opening the cabinet door 2 of the power distribution cabinet and causing harm.

[0020] The bottom of the push plate 37 contacts the top of the long plate 311, and the bottom of the long plate 311 contacts the top of the baffle 310. The long plate 311 can be fixed by the cooperation of the push plate 37 and the baffle 310.

[0021] The back of the air injection device 39 contacts the side of the long plate 311 near the cabinet door 2. An air passage is provided inside the connecting plate 35, and the pneumatic telescopic rod 36 can be inflated when someone shakes the cabinet door 2.

[0022] When the present embodiment is working, after the key is inserted, the handle 31 is pressed down to drive the connecting column 32 to rotate. When the handle 31 drives the connecting column 32 to rotate, the connecting column 32 drives the long plate 311 to rotate counterclockwise. When the connecting column 32 drives the long plate 311 to rotate counterclockwise, the long plate 311 is separated from the contact with the baffle 310. When the long plate 311 is separated from the contact with the baffle 310, the long plate 311 is pulled out without being blocked by the front wall inside the body 1 and is opened. The cabinet door 2 will shake when there is no key inserted or when the cabinet door 2 is impacted from the outside or someone forces the cabinet door 2 to be opened. When the cabinet door 2 shakes, the cabinet door 2 will drive the connecting column 32 to shake. When the cabinet door 2 drives the connecting column 32 to shake, the connecting column 32 will drive the long board 311 to shake. When the connecting column 32 drives the long board 311 to shake, the side of the long board 311 close to the cabinet door 2 will contact the side of the air pump 39 away from the cabinet door 2. When the long board 311 is shaken, the side of the air pump 39 close to the cabinet door 2 will contact the side of the air pump 39 away from the cabinet door 2. When the side of the air pump 39 close to the cabinet door 2 contacts the side of the air pump 39 away from the cabinet door 2, the air pump 39 will be squeezed by the long plate 311 and will shrink. When the air pump 39 is squeezed by the long plate 311 and shrinks, the air pump 39 will press the external air into the air pipe 38. When the air pump 39 presses the external air into the air pipe 38, the air will flow into the connecting plate 35 through the air pipe 38. When air flows into the connecting plate 35, the pneumatic telescopic rod 36 The free end will be pushed downward by the air. When the free end of the pneumatic telescopic rod 36 moves downward due to the push of the air, the free end of the pneumatic telescopic rod 36 will drive the push plate 37 to move downward. When the free end of the pneumatic telescopic rod 36 drives the push plate 37 to move downward, the bottom of the push plate 37 will contact the top of the long plate 311. When the bottom of the push plate 37 contacts the top of the long plate 311, the long plate 311 will be fixed in the middle by the baffle 310 and the push plate 37, thereby preventing the cabinet door 2 from being illegally opened.

[0023] See also Figures 1 - 7, on the basis of the above embodiments, in another embodiment of the present invention, a current cut-off device and a heat dissipation device are further included. The current cut-off device includes a current cut-off switch 41, a first support block 42, a first spring 43, a rotating rod 44, a first horizontal plate 45, a support column 46, a second horizontal plate 47, a current cut-off switch 48, a micro motor 49, and a timing switch 410. The current cut-off switch 41 is fixedly connected to the right inner wall of the machine body 1. The current cut-off switch 48 is rotatably connected to the left side of the current cut-off switch 41. The first support block 42 is fixedly connected to the right inner wall of the machine body 1. The top of the first spring 43 is fixedly connected to the top of the long groove. The second horizontal plate 47 is slidably installed inside the first support block 42. The second horizontal plate 47 is fixedly connected to the bottom of the first spring 43. The support column 46 is fixedly connected to the top of the second horizontal plate 47. The first horizontal plate 45 is fixedly connected to the top of the support column 46. The micro motor 49 is fixedly connected to the side of the first support block 42 away from the cabinet door 2. The timing switch 410 is rotatably connected to the left side of the micro motor 49. The top of the rotating rod 44 is fixedly connected to the output end of the micro motor 49. When a trip occurs, there is no need for manual pushing. When the power distribution cabinet door 2 is opened, the contact between the toggle lever 33 and the current cut-off switch 48 will cut off the power of the power distribution cabinet, which can effectively prevent the staff from being injured by accidentally touching the electronic components inside the power distribution cabinet.

[0024] The toggle lever 33 contacts the bottom of the current cut-off switch 48. The first support block 42 is provided with a long groove. The bottom of the second horizontal plate 47 contacts the top of the current cut-off switch 48. The current cut-off switch 48 is controlled by the toggle lever 33. As long as the cabinet door 2 is opened, the power can be cut off first to prevent electric shock.

[0025] The current cut-off switch 48 is electrically connected to the current cut-off switch 41. The timing switch 410 is electrically connected to the micro motor 49. The bottom of the rotating rod 44 contacts the top of the first horizontal plate 45. One end of the first horizontal plate 45 away from the cabinet door 2 contacts the timing switch 410. After a period of time after a trip, the micro motor 49 will start working and attempt to restore the current.

[0026] The heat dissipation device includes a fan device 51, a fan blade 52, an electric wire 53, a sliding rheostat 54, a second spring 55, a vertical plate 56, a Z-shaped rod 57, a support plate 58, a push block 59, an inclined block 510, a second support block 511, a bimetallic strip 512, a slider 513, and a slide rod 514. The fan device 51 is rotatably connected to the inner right wall of the machine body 1. The fan blade 52 is fixedly connected to the circumferential surface of the fan device 51. The electric wire 53 is fixedly connected to the inner right wall of the machine body 1. The sliding rheostat 54 is fixedly connected to the inner right wall of the machine body 1. The slide rod 514 is fixedly installed inside the sliding rheostat 54. The slider 513 is slidably installed on the circumferential surface of the slide rod 514. The second spring 55 is fixedly installed between the slider 513 and the sliding rheostat 54. The second support block 511 is fixedly connected to the inner right wall of the machine body 1. The bottom of the bimetallic strip 512 is fixedly connected to the top of the second support block 511. The vertical plate 56 is fixedly connected to the top of the slider 513. The support plate 58 is fixedly connected to the inner right wall of the machine body 1. The Z-shaped rod 57 slidably penetrates through the support plate 58. The end of the Z-shaped rod 57 away from the cabinet door 2 is fixedly connected to the surface of the vertical plate 56 close to the first support block 42. The push block 59 is fixedly connected to the end of the Z-shaped rod 57 close to the cabinet door 2. The inclined block 510 is fixedly connected to the top of the first horizontal plate 45. This device can automatically adjust the air volume according to the temperature. When someone opens the cabinet door 2, the disconnector 41 will cut off the power supply of the power distribution cabinet or when a tripping power failure occurs, at this time the electronic components in the power distribution cabinet are not working, so there is no need for heat dissipation. At this time, when the inclined block 510 contacts the push block 59, the slider 513 will move to the right and the fan blade 52 will stop rotating, which can effectively reduce the power consumption and cost.

[0027] The electric wire 53 is electrically connected to the fan device 51 and the sliding rheostat 54. The slider 513 is slidably connected to the circumferential surface of the slide rod 514. The inclined surface of the inclined block 510 contacts the bottom of the push block 59. When the electronic components in the power distribution cabinet do not work, the fan blade 52 will not rotate.

[0028] During the operation of this embodiment: When the handle 31 is pressed down, the handle 31 will drive the connecting column 32 to rotate. When the handle 31 drives the connecting column 32 to rotate, the connecting column 32 will drive the lever 33 to rotate. When the connecting column 32 drives the lever 33 to rotate, the lever 33 will contact the cut-off switch 48. When the lever 33 contacts the cut-off switch 48, the lever 33 will push the cut-off switch 48 upward. When the lever 33 pushes the cut-off switch 48 upward, the cut-off switch 48 will cut off the circuit in the power distribution cabinet to prevent someone from opening the power distribution cabinet and accidentally touching the circuit and causing harm. When the cut-off switch 48 moves upward or trips and moves upward, the cut-off switch 48 will contact the second cross plate 47. When the cut-off switch 48 contacts the second cross plate 47, the second cross plate 47 will be pushed upward by the cut-off switch 48. When the second cross plate 47 is pushed upward by the cut-off switch 48, the second cross plate 47 will drive the first cross plate 45 to move upward. When the first cross plate 45 moves upward, the top surface of the first cross plate 45 will contact the timing switch 410. When the top surface of the first cross plate 45 contacts the timing switch 410, the timing switch 410 will start timing. When the timing switch 410 completes timing, the timing switch 410 will drive the micro motor 49. When the micro motor 49 operates, the micro motor 49 will drive the rotating rod 44 to rotate one week. When the rotating rod 44 rotates, the rotating rod 44 will contact the top of the first cross plate 45. When the rotating rod 44 contacts the top of the first cross plate 45, the first cross plate 45 will be pushed downward by the rotating rod 44. When the first cross plate 45 is pushed downward by the rotating rod 44, the first cross plate 45 will drive the support column 46 to move downward. When the first cross plate 45 drives the support column 46 to move downward, the support column 46 will drive the second cross plate 47 to move downward. When the support column 46 drives the second cross plate 47 to move downward, the second cross plate 47 will contact the cut-off switch 48. When the second cross plate 47 contacts the cut-off switch 48, the cut-off switch 48 will be pushed downward by the second cross plate 47. When the cut-off switch 48 is pushed downward by the second cross plate 47, the cut-off switch 48 will turn on the current in the power distribution cabinet.

[0029] When the temperature inside the power distribution cabinet rises, due to the different thermal expansion coefficients on both sides of the bimetallic strip 512, it will bend. When the bimetallic strip 512 bends, it will contact the slider 513. When the bimetallic strip 512 contacts the slider 513, the slider 513 will be pushed to the left by the bimetallic strip 512. When the slider 513 is pushed to the left by the bimetallic strip 512, the slider 513 will control the size of the rheostat 54. When the temperature inside the power distribution cabinet becomes higher, the bending angle of the bimetallic strip 512 will become larger. When the bending angle of the bimetallic strip 512 becomes larger, the farther the slider 513 moves to the left. When the slider 513 moves to the left, it will drive the control end of the rheostat 54 to move to the left. By moving the control end of the rheostat 54 to the left, the resistance of the rheostat 54 can be reduced. Thus, when the slider 513 moves farther to the left, the rheostat 54 will increase the power of the fan device 51, so that the speed of the fan blade 52 driven by the fan device 51 can be increased. When the rheostat 54 drives the rotation speed of the fan blade 52 to become faster, better heat dissipation can be achieved. When the temperature inside the power distribution cabinet becomes lower, the bending angle of the bimetallic strip 512 will become smaller. When the bending angle of the bimetallic strip 512 becomes smaller, the spring two 55 will drive the slider 513 to move to the right. When the slider 513 moves to the right, the rotation speed of the fan device 51 will become smaller. When the cut-off switch 48 moves upward, the cut-off switch 48 will drive the cross plate two 47 to move upward. When the cut-off switch 48 drives the cross plate two 47 to move upward, the cross plate two 47 will drive the cross plate one 45 to move upward. When the cross plate two 47 drives the cross plate one 45 to move upward, the cross plate one 45 will drive the inclined block 510 to rise. When the cross plate one 45 drives the inclined block 510 to rise, the inclined block 510 will contact the push block 59. When the inclined block 510 contacts the push block 59, the push block 59 will be moved in the direction close to the cabinet door 2 by the inclined block 510. When the push block 59 moves in the direction close to the cabinet door 2, the push block 59 will drive the Z-shaped rod 57 to move in the direction of the cabinet door 2. When the Z-shaped rod 57 moves in the direction of the cabinet door 2, the Z-shaped rod 57 will drive the vertical plate 56 to move to the right. When the Z-shaped rod 57 drives the vertical plate 56 to move to the right, the vertical plate 56 will drive the slider 513 to move to the right.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power distribution cabinet with an active protection function, comprising a machine body (1), characterized in that: It also includes an anti-theft device, a flow cut-off device and a heat dissipation device; Among them, a cabinet door (2) is rotatably connected to the front part of the machine body (1); the anti-theft device includes a handle (31), a connecting column (32), a lever (33), a return frame (34), a connecting plate (35), a pneumatic telescopic rod (36), a push plate (37), an air pipe (38), an air pumping device (39), a baffle (310) and a long plate (311). The connecting column (32) rotatably penetrates through the cabinet door (2). The handle (31) is fixedly connected to the front end of the connecting column (32). The long plate (311) is fixedly connected to the rear end of the connecting column (32). The lever (33) is fixedly connected to the side of the long plate (311) away from the cabinet door (2). The return frame (34) is fixedly connected to the inner right wall of the machine body (1). The fixed end of the pneumatic telescopic rod (36) is fixedly connected to the top surface of the inner wall of the return frame (34). The push plate (37) is fixedly connected to the free end of the pneumatic telescopic rod (36). The connecting plate (35) is fixedly connected to the top of the return frame (34). The top of the air pipe (38) is fixedly connected to the bottom of the connecting plate (35). One side of the air pumping device (39) close to the cabinet door (2) is fixedly connected to the inner front wall of the machine body (1). The bottom of the air pipe (38) is fixedly connected to the top of the air pumping device (39). The baffle (310) is fixedly connected to the inner front wall of the machine body (1).

2. The power distribution cabinet with an active protection function according to claim 1, characterized in that: The bottom of the push plate (37) contacts the top of the long plate (311), and the bottom of the long plate (311) contacts the top of the baffle (310).

3. The power distribution cabinet with an active protection function according to claim 2, characterized in that: The back of the air pumping device (39) contacts the side of the long plate (311) close to the cabinet door (2), and an air passage is provided inside the connecting plate (35).

4. The power distribution cabinet with an active protection function according to claim 3, characterized in that: The flow cut-off device includes a flow cut-off device (41), a first support block (42), a first spring (43), a rotating rod (44), a first horizontal plate (45), a support column (46), a second horizontal plate (47), a flow cut-off switch (48), a micro motor (49) and a timing switch (410). The flow cut-off device (41) is fixedly connected to the inner right wall of the machine body (1). The flow cut-off switch (48) is rotatably connected to the left side of the flow cut-off device (41). The first support block (42) is fixedly connected to the inner right wall of the machine body (1). The first support block (42) is provided with a long groove. The top of the first spring (43) is fixedly connected to the top of the long groove. The second horizontal plate (47) is slidably installed inside the first support block (42). The second horizontal plate (47) is fixedly connected to the bottom of the first spring (43). The support column (46) is fixedly connected to the top of the second horizontal plate (47). The first horizontal plate (45) is fixedly connected to the top of the support column (46). The micro motor (49) is fixedly connected to the side of the first support block (42) away from the cabinet door (2). The timing switch (410) is rotatably connected to the left side of the micro motor (49). The top of the rotating rod (44) is fixedly connected to the output end of the micro motor (49).

5. The power distribution cabinet with an active protection function according to claim 4, wherein: The shift lever (33) contacts the bottom of the cut-off switch (48). Long slots are provided on the front and rear surfaces of the first support block (42). The bottom of the second cross plate (47) contacts the top of the cut-off switch (48).

6. The power distribution cabinet with an active protection function according to claim 5, characterized in that: The cut-off switch (48) is electrically connected to the cut-off device (41). The timing switch (410) is electrically connected to the micro motor (49). The bottom of the rotating rod (44) contacts the top of the first cross plate (45). One end of the first cross plate (45) away from the cabinet door (2) contacts the timing switch (410).

7. The power distribution cabinet with an active protection function according to claim 6, wherein: The heat dissipation device includes a blower device (51), a fan blade (52), a wire (53), a sliding rheostat (54), a second spring (55), a vertical plate (56), a Z-shaped rod (57), a support plate (58), a push block (59), an inclined block (510), a second support block (511), a bimetallic strip (512), a slider (513), and a sliding rod (514). The blower device (51) is rotatably connected to the right inner wall of the machine body (1). The fan blade (52) is fixedly connected to the circumferential surface of the blower device (51). The wire (53) is fixedly connected to the right inner wall of the machine body (1). The sliding rheostat (54) is fixedly connected to the right inner wall of the machine body (1). The sliding rod (514) is fixedly installed inside the sliding rheostat (54). The slider (513) is slidably installed on the circumferential surface of the sliding rod (514). The second spring (55) is fixedly installed between the slider (513) and the sliding rheostat (54). The second support block (511) is fixedly connected to the right inner wall of the machine body (1). The bottom of the bimetallic strip (512) is fixedly connected to the top of the second support block (511). The vertical plate (56) is fixedly connected to the top of the slider (513). The support plate (58) is fixedly connected to the right inner wall of the machine body (1). The Z-shaped rod (57) slidably penetrates through the support plate (58). One end of the Z-shaped rod (57) away from the cabinet door (2) is fixedly connected to one surface of the vertical plate (56) close to the first support block (42). The push block (59) is fixedly connected to one end of the Z-shaped rod (57) close to the cabinet door (2). The inclined block (510) is fixedly connected to the top of the first cross plate (45).

8. The power distribution cabinet with an active protection function according to claim 7, characterized in that: The wire (53) is electrically connected to the blower device (51) and the sliding rheostat (54). The slider (513) is slidably connected to the circumferential surface of the sliding rod (514). The inclined surface of the inclined block (510) contacts the bottom of the push block (59).

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