CN112072494A

CN112072494A - Power distribution cabinet capable of automatically replacing standby circuit

Info

Publication number: CN112072494A
Application number: CN202010963515.7A
Authority: CN
Inventors: 周魁前
Original assignee: Ningbo Lixiang Electronics Co ltd
Current assignee: Ningbo Lixiang Electronics Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2020-12-11

Abstract

The invention discloses a power distribution cabinet capable of automatically replacing a standby circuit, which comprises a box body, wherein an accommodating space is arranged in the box body, a switching mechanism is arranged in the accommodating space, the switching mechanism comprises a first motor fixedly connected to the inner wall of the rear side of the accommodating space, the right end face of the first motor is rotatably connected with a first driving shaft, a first connecting rod is fixedly connected to the first driving shaft, the other end of the first connecting rod is rotatably connected with a first rotating shaft, the first rotating shaft is rotatably connected with a second connecting rod, and the other end of the second connecting rod is rotatably connected with a second rotating shaft, the intercommunication of assurance circuit avoids influencing people's work because the switch board catches fire.

Description

Power distribution cabinet capable of automatically replacing standby circuit

Technical Field

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet capable of automatically replacing a standby circuit.

Background

The switch board is motor control center's general name, the switch board is used in the load and is more dispersed, the less occasion in return circuit, motor control center is used for the load and concentrates, the more occasion in return circuit, they distribute the electric energy of a certain circuit of last grade distribution equipment to load nearby, the inside no safety device of traditional switch board, when the condition of short circuit conflagration takes place, the processing of putting out a fire can not be carried out the very first time, and after the circuit is burnt out, need a period of time to maintain and change just can resume work, influence work efficiency, give people and bring very big puzzlement.

Disclosure of Invention

The invention aims to solve the technical problem of providing a power distribution cabinet capable of automatically replacing a standby circuit, and solves the problems that the traditional power distribution cabinet is internally provided with no safety device, fire extinguishing treatment cannot be carried out at the first time when a short-circuit fire disaster occurs, and after a circuit is burnt out, the work can be recovered after maintenance and replacement are carried out for a period of time, the work efficiency is influenced, and great troubles are brought to people.

The invention is realized by the following technical scheme.

The power distribution cabinet capable of automatically replacing the standby circuit comprises a box body, wherein an accommodating space is arranged in the box body, a switching mechanism is arranged in the accommodating space, the switching mechanism comprises a first motor fixedly connected to the inner wall of the rear side of the accommodating space, the right end face of the first motor is rotatably connected with a first driving shaft, a first connecting rod is fixedly connected to the first driving shaft, the other end of the first connecting rod is rotatably connected with a first rotating shaft, the first rotating shaft is rotatably connected with a second connecting rod, the other end of the second connecting rod is rotatably connected with a second rotating shaft, the second rotating shaft is fixedly connected with a first supporting rod, a first fixed block is fixedly connected to the inner wall of the right side of the accommodating space, a first fixed cavity is arranged in the first fixed block, and a first compression spring is fixedly connected to the inner wall of the upper side of the first fixed, the other end of the first compression spring is fixedly connected with a sliding block, the sliding block is connected with the first fixed cavity in a sliding mode, the lower end face of the sliding block is fixedly connected with the first supporting rod, a through hole is formed in the inner wall of the right side of the first fixed cavity, an input wire is fixedly connected to the lower end face of the sliding block, the input wire penetrates through the through hole to be connected with an external circuit, a first input block is fixedly connected to the inner wall of the left side of the first fixed cavity, and a second input block fixedly connected to the inner wall of the left side of the first fixed cavity is arranged on the upper side of the first; the lower side of the conversion mechanism is provided with an induction mechanism, the induction mechanism comprises an induction box fixedly connected with the inner wall of the rear side of the arrangement space, an induction cavity is arranged in the induction box, the inner wall of the right side of the induction cavity is fixedly connected with a second fixed block, a second fixed cavity is arranged in the second fixed block, the inner wall of the right side of the second fixed cavity is fixedly connected with a second compression spring, the other end of the second compression spring is fixedly connected with a piston, the piston is connected with the second fixed cavity in a sliding manner, the right end surface of the piston is fixedly connected with a second support rod, the second support rod penetrates through the inner wall of the right side of the second fixed cavity, the right end surface of the second support rod is fixedly connected with a pushing block, the lower end surface of the pushing block is fixedly connected with a first iron block, the lower side of the first iron block is, the second iron plate with first iron plate sliding connection, first iron plate right side is equipped with fixed connection and is in settle the power supply piece of space right side inner wall, the inside spread groove that is equipped with the opening left of power supply piece, first iron plate can with spread groove sliding connection.

The lower side of the induction mechanism is provided with a fire extinguishing mechanism, the fire extinguishing mechanism comprises a fire extinguishing box fixedly connected with the lower side inner wall of the arrangement space, a fire extinguishing cavity is arranged inside the fire extinguishing box, the right side inner wall of the fire extinguishing cavity is fixedly connected with a second motor, the left end face of the second motor is rotatably connected with a second driving shaft, an impeller is fixedly connected onto the second driving shaft, the left side of the impeller is provided with a dust box fixedly connected with the upper side inner wall of the fire extinguishing cavity, the inside of the dust box is provided with a dust cavity, the lower side inner wall of the dust cavity is provided with a first baffle, the first baffle penetrates through the lower side inner wall of the dust cavity to be connected with the lower side inner wall of the dust cavity in a sliding manner, the upper side inner wall of the dust cavity is fixedly connected with a third fixed block, a third fixed cavity with a downward opening is arranged inside the third, the other end of the third compression spring is fixedly connected with a magnet, the lower end face of the magnet is fixedly connected with a third supporting block, the third supporting block is fixedly connected with the first baffle, two symmetrically distributed ventilation openings are formed in the inner wall of the upper side of the fire extinguishing chamber, a fourth fixing block is fixedly connected with the upper end face of the fire extinguishing chamber, a fourth fixing chamber is arranged inside the fourth fixing block, an electromagnet is fixedly connected with the lower side inner wall of the fourth fixing chamber, the left side and the right side of the electromagnet are fixedly connected with two symmetrical fourth compression springs, one end of the fourth compression spring, which is far away from a symmetry center, is fixedly connected with an iron plate, and the iron plate is connected with the fourth fixing chamber.

Preferably, the shifter mechanism still includes fixed connection and is in the output piece of arrangement space left side inner wall, output piece left end face fixedly connected with output wire, output wire passes arrangement space left side inner wall connection external circuit, output piece right-hand member face fixedly connected with stand-by circuit, the stand-by circuit other end is connected the second input piece left end face, the stand-by circuit downside is equipped with fixed connection and is in the main circuit of output piece right-hand member face, main circuit other end fixed connection is in on the first input piece right-hand member face, stand-by circuit with be equipped with fixed connection in the middle of the main circuit and be in the fire baffle of arrangement space rear side inner wall.

Preferably, induction mechanism still includes fixed connection the power of arrangement space rear side inner wall, the power right side is equipped with fixed connection and is in the alarm of arrangement space right side inner wall, the alarm the power with first motor passes through first electric wire electricity is connected, first electric wire one end electricity is connected with fixed connection the third iron plate of arrangement space rear side inner wall, first electric wire other end electricity is connected with fixed connection the electrically conductive axle of arrangement space rear side inner wall, it is connected with the fourth iron plate to rotate on the electrically conductive axle.

Preferably, the fire extinguishing mechanism further comprises a third motor fixedly connected to the inner wall of the rear side of the installation space, the third motor is connected to the electromagnet and the second motor through second electric wires, one end of each second electric wire is electrically connected to the corresponding second iron block, the other end of each second electric wire is electrically connected to the corresponding power supply block, the left end face of the third motor is rotatably connected to a third driving shaft, a second baffle is fixedly connected to the third driving shaft, a heat dissipation opening is formed in the inner wall of the left side of the installation space, and the heat dissipation opening is located on the upper side of the second baffle.

The invention has the beneficial effects that: the fire extinguishing mechanism is arranged, so that the power distribution cabinet can be closed when the power distribution cabinet catches fire, the fire spreading is prevented while the fire is conveniently extinguished, the circuit is protected, the standby circuit can be automatically replaced when the power distribution cabinet catches fire, the circuit communication is ensured, and the phenomenon that the work of people is influenced due to the fact that the power distribution cabinet catches fire is avoided. .

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the embodiment of the present invention at A in FIG. 1;

FIG. 3 is an enlarged schematic view of the embodiment of the present invention at B in FIG. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The power distribution cabinet capable of automatically replacing the standby circuit, which is described in conjunction with fig. 1-3, includes a cabinet 10, a placement space 11 is provided inside the cabinet 10, a switching mechanism 90 is provided inside the placement space 11, the switching mechanism 90 includes a first motor 63 fixedly connected to the inner wall of the rear side of the placement space 11, the right end surface of the first motor 63 is rotatably connected to a first driving shaft 61, a first connecting rod 62 is fixedly connected to the first driving shaft 61, the other end of the first connecting rod 62 is rotatably connected to a first rotating shaft 60, the first rotating shaft 60 is rotatably connected to a second connecting rod 59, the other end of the second connecting rod 59 is rotatably connected to a second rotating shaft 58, the second rotating shaft 58 is fixedly connected to a first supporting rod 21, the inner wall of the right side of the placement space 11 is fixedly connected to a first fixing block 16, and a first fixing cavity 18 is provided inside the first fixing block, the inner wall of the upper side of the first fixed cavity 18 is fixedly connected with a first compression spring 17, the other end of the first compression spring 17 is fixedly connected with a sliding block 19, the sliding block 19 is connected with the first fixed cavity 18 in a sliding manner, the lower end face of the sliding block 19 is fixedly connected with the first supporting rod 21, the inner wall of the right side of the first fixed cavity 18 is provided with a through hole 35, the lower end face of the sliding block 19 is fixedly connected with an input electric wire 20, the input electric wire 20 passes through the through hole 35 to be connected with an external circuit, the inner wall of the left side of the first fixed cavity 18 is fixedly connected with a first input block 70, the upper side of the first input block 70 is provided with a second input block 15 fixedly connected with the inner wall of the left side of the first fixed cavity 18, the first motor 63 is started to drive the first driving shaft 61 to rotate, the first driving shaft 61 drives the first connecting rod 62 to rotate, the first, the first rotating shaft 60 rotates the second connecting rod 59, the second connecting rod 59 moves the second rotating shaft 58, the second rotating shaft 58 moves the first supporting rod 21, and the first supporting rod 21 moves the sliding block 19; the lower side of the conversion mechanism 90 is provided with a sensing mechanism 91, the sensing mechanism 91 comprises a sensing box 33 fixedly connected to the inner wall of the rear side of the arrangement space 11, a sensing cavity 34 is arranged inside the sensing box 33, the inner wall of the right side of the sensing cavity 34 is fixedly connected with a second fixed block 28, the inner wall of the right side of the second fixed block 28 is provided with a second fixed cavity 29, the inner wall of the right side of the second fixed cavity 29 is fixedly connected with a second compression spring 30, the other end of the second compression spring 30 is fixedly connected with a piston 32, the piston 32 is slidably connected with the second fixed cavity 29, the right end face of the piston 32 is fixedly connected with a second support rod 31, the second support rod 31 passes through the inner wall of the right side of the second fixed cavity 29, the right end face of the second support rod 31 is fixedly connected with a pushing block 22, the lower end face of the pushing block 22 is fixedly connected with a first iron block 23, the lower side of the first iron block, the second iron block 26 is slidably connected with the first iron block 23, a power supply block 24 fixedly connected to the inner wall of the right side of the accommodating space 11 is arranged on the right side of the first iron block 23, a connecting groove 25 with a leftward opening is formed in the power supply block 24, the first iron block 23 can be slidably connected with the connecting groove 25, when the gas in the sensing cavity 34 expands due to heating, the piston 32 is pushed to move rightwards, the second compression spring 30 is compressed, the piston 32 drives the second support rod 31 to move rightwards, the second support rod 31 drives the pushing block 22 to move rightwards, and the pushing block 22 drives the first iron block 23 to move rightwards until being slidably connected with the connecting groove 25.

The sensing mechanism 91 is provided with a fire extinguishing mechanism 92 at the lower side thereof, the fire extinguishing mechanism 92 comprises a fire extinguishing box 39 fixedly connected with the lower side inner wall of the installation space 11, a fire extinguishing chamber 40 is arranged inside the fire extinguishing box 39, the right side inner wall of the fire extinguishing chamber 40 is fixedly connected with a second motor 36, the left end surface of the second motor 36 is rotatably connected with a second driving shaft 37, an impeller 38 is fixedly connected with the second driving shaft 37, the left side of the impeller 38 is provided with a dust box 41 fixedly connected with the upper side inner wall of the fire extinguishing chamber 40, the dust box 41 is internally provided with a dust chamber 42, the lower side inner wall of the dust chamber 42 is provided with a first baffle 43, the first baffle 43 passes through the lower side inner wall of the dust chamber 42 to be slidably connected with the lower side inner wall of the dust chamber 42, the upper side inner wall of the dust chamber 42 is fixedly connected with a third fixing block 45, the third fixing block 45 is internally provided, a third compression spring 47 is fixedly connected to the inner wall of the upper side of the third fixed cavity 46, a magnet 48 is fixedly connected to the other end of the third compression spring 47, a third supporting block 44 is fixedly connected to the lower end face of the magnet 48, the third supporting block 44 is fixedly connected to the first baffle 43, two symmetrically distributed ventilation openings 72 are formed in the inner wall of the upper side of the fire extinguishing cavity 40, a fourth fixed block 49 is fixedly connected to the upper end face of the fire extinguishing box 39, a fourth fixed cavity 51 is arranged inside the fourth fixed block 49, an electromagnet 53 is fixedly connected to the inner wall of the lower side of the fourth fixed cavity 51, two symmetrical fourth compression springs 52 are fixedly connected to the left and right sides of the electromagnet 53, an iron plate 50 is fixedly connected to one end of the fourth compression spring 52 far away from the symmetry center, the iron plate 50 is slidably connected to the fourth fixed cavity 51, and the second motor 36 is, the second driving shaft 37 is driven to rotate, the second driving shaft 37 drives the impeller 38 to rotate, the electromagnet 53 is electrified, the two iron plates 50 are attracted and move towards the middle, the fourth compression spring 52 is compressed, the two ventilation openings 72 are opened, the magnet 48 is attracted and moves upwards, the third compression spring 47 is compressed, the magnet 48 drives the third supporting block 44 to move upwards, and the third supporting block 44 drives the first baffle 43 to move upwards.

Beneficially, the switching mechanism 90 further includes an output block 12 fixedly connected to the inner wall of the left side of the accommodating space 11, an output electric wire 13 is fixedly connected to the left end face of the output block 12, the output electric wire 13 passes through the inner wall of the left side of the accommodating space 11 to connect to an external circuit, a standby circuit 14 is fixedly connected to the right end face of the output block 12, the other end of the standby circuit 14 is connected to the left end face of the second input block 15, a main circuit 71 fixedly connected to the right end face of the output block 12 is arranged on the lower side of the standby circuit 14, the other end of the main circuit 71 is fixedly connected to the right end face of the first input block 70, and a fire baffle plate 74 fixedly connected to the inner wall of the rear side of the accommodating space 11 is.

Beneficially, the sensing mechanism 91 further comprises a power supply 65 fixedly connected to the inner wall of the rear side of the placement space 11, the right side of the power supply 65 is provided with an alarm 66 fixedly connected to the inner wall of the right side of the placement space 11, the alarm 66, the power supply 65 and the first motor 63 are electrically connected through the first electric wire 64, one end of the first electric wire 64 is electrically connected to a third iron block 67 fixedly connected to the inner wall of the rear side of the placement space 11, the other end of the first electric wire 64 is electrically connected to a conductive shaft 68 fixedly connected to the inner wall of the rear side of the placement space 11, and the conductive shaft 68 is rotatably connected to a fourth iron block 69.

Beneficially, the fire extinguishing mechanism 92 further includes a third motor 56 fixedly connected to the inner wall of the rear side of the accommodating space 11, the third motor 56, the electromagnet 53 and the second motor 36 are electrically connected through the second electric wire 75, one end of the second electric wire 75 is electrically connected to the second iron block 26, the other end of the second electric wire 75 is electrically connected to the power supply block 24, a third driving shaft 55 is rotatably connected to the left end surface of the third motor 56, a second baffle 54 is fixedly connected to the third driving shaft 55, a heat dissipating opening 57 is arranged on the inner wall of the left side of the accommodating space 11, and the heat dissipating opening 57 is located on the upper side of the second baffle 54.

In the initial state, the first compression spring 17, the second compression spring 30, the third compression spring 47, and the fourth compression spring 52 are in the normal state.

When the main circuit 71 catches fire, the gas inside the sensing cavity 34 expands due to heat and pushes the piston 32 to move rightwards, the second compression spring 30 is compressed, the piston 32 drives the second support rod 31 to move rightwards, the second support rod 31 drives the push block 22 to move rightwards, the push block 22 pushes the fourth iron block 69 to rotate, the fourth iron block 69 is in contact with the third iron block 67, the circuit is communicated, the alarm 66 starts to alarm, the first motor 63 is started to drive the first drive shaft 61 to rotate, the first drive shaft 61 drives the first connecting rod 62 to rotate, the first connecting rod 62 drives the first rotating shaft 60 to rotate, the first rotating shaft 60 drives the second connecting rod 59 to rotate, the second connecting rod 59 drives the second rotating shaft 58 to move upwards, the second rotating shaft 58 drives the first support rod 21 to move upwards, the first support rod 21 drives the slide block 19 to move upwards, the slide block 19 is connected with the second input block 15 to be converted into, the pushing block 22 drives the first iron block 23 to move rightwards until the first iron block is connected with the connecting groove 25 in a sliding mode, the circuit is communicated, the third motor 56 is started to drive the third driving shaft 55 to rotate, the second baffle plate 54 rotates to close the heat dissipation port 57, the electromagnet 53 is electrified, the two iron plates 50 are attracted and move towards the middle, the fourth compression spring 52 is compressed, the two ventilation ports 72 are opened, the magnet 48 is attracted and moves upwards, the third compression spring 47 is compressed, the magnet 48 drives the third supporting block 44 to move upwards, the third supporting block 44 drives the first baffle plate 43 to move upwards, dust in the dust cavity 42 falls down, the second motor 36 is started to drive the second driving shaft 37 to rotate, the second driving shaft 37 drives the impeller 38 to rotate, and the dust covers the main circuit 71 to extinguish fire.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a can change standby circuit's switch board automatically, includes the box, its characterized in that: the box body is internally provided with an accommodating space, a switching mechanism is arranged in the accommodating space and comprises a first motor fixedly connected with the inner wall of the rear side of the accommodating space, the right end face of the first motor is rotatably connected with a first driving shaft, the first driving shaft is fixedly connected with a first connecting rod, the other end of the first connecting rod is rotatably connected with a first rotating shaft, the first rotating shaft is rotatably connected with a second connecting rod, the other end of the second connecting rod is rotatably connected with a second rotating shaft, the second rotating shaft is fixedly connected with a first supporting rod, the inner wall of the right side of the accommodating space is fixedly connected with a first fixed block, a first fixed cavity is arranged in the first fixed block, a first compression spring is fixedly connected with the inner wall of the upper side of the first fixed cavity, the other end of the first compression spring is fixedly connected with a sliding block, and the sliding block is, the lower end face of the sliding block is fixedly connected with the first supporting rod, a through hole is formed in the inner wall of the right side of the first fixed cavity, an input wire is fixedly connected to the lower end face of the sliding block, the input wire penetrates through the through hole to be connected with an external circuit, a first input block is fixedly connected to the inner wall of the left side of the first fixed cavity, and a second input block fixedly connected to the inner wall of the left side of the first fixed cavity is arranged on the upper side of the first input block; the lower side of the conversion mechanism is provided with an induction mechanism, the induction mechanism comprises an induction box fixedly connected with the inner wall of the rear side of the arrangement space, an induction cavity is arranged in the induction box, the inner wall of the right side of the induction cavity is fixedly connected with a second fixed block, a second fixed cavity is arranged in the second fixed block, the inner wall of the right side of the second fixed cavity is fixedly connected with a second compression spring, the other end of the second compression spring is fixedly connected with a piston, the piston is connected with the second fixed cavity in a sliding manner, the right end surface of the piston is fixedly connected with a second support rod, the second support rod penetrates through the inner wall of the right side of the second fixed cavity, the right end surface of the second support rod is fixedly connected with a pushing block, the lower end surface of the pushing block is fixedly connected with a first iron block, the lower side of the first iron block is, the second iron block is connected with the first iron block in a sliding mode, a power supply block fixedly connected to the inner wall of the right side of the accommodating space is arranged on the right side of the first iron block, a connecting groove with a leftward opening is formed in the power supply block, and the first iron block can be connected with the connecting groove in a sliding mode; the lower side of the induction mechanism is provided with a fire extinguishing mechanism, the fire extinguishing mechanism comprises a fire extinguishing box fixedly connected with the lower side inner wall of the arrangement space, a fire extinguishing cavity is arranged inside the fire extinguishing box, the right side inner wall of the fire extinguishing cavity is fixedly connected with a second motor, the left end face of the second motor is rotatably connected with a second driving shaft, an impeller is fixedly connected onto the second driving shaft, the left side of the impeller is provided with a dust box fixedly connected with the upper side inner wall of the fire extinguishing cavity, the inside of the dust box is provided with a dust cavity, the lower side inner wall of the dust cavity is provided with a first baffle, the first baffle penetrates through the lower side inner wall of the dust cavity to be connected with the lower side inner wall of the dust cavity in a sliding manner, the upper side inner wall of the dust cavity is fixedly connected with a third fixed block, a third fixed cavity with a downward opening is arranged inside the third, the other end of the third compression spring is fixedly connected with a magnet, the lower end face of the magnet is fixedly connected with a third supporting block, the third supporting block is fixedly connected with the first baffle, two symmetrically distributed ventilation openings are formed in the inner wall of the upper side of the fire extinguishing chamber, a fourth fixing block is fixedly connected with the upper end face of the fire extinguishing chamber, a fourth fixing chamber is arranged inside the fourth fixing block, an electromagnet is fixedly connected with the lower side inner wall of the fourth fixing chamber, the left side and the right side of the electromagnet are fixedly connected with two symmetrical fourth compression springs, one end of the fourth compression spring, which is far away from a symmetry center, is fixedly connected with an iron plate, and the iron plate is connected with the fourth fixing chamber.

2. The power distribution cabinet capable of automatically replacing the standby circuit according to claim 1, characterized in that: the shifter mechanism further comprises an output block fixedly connected to the inner wall on the left side of the arrangement space, an output electric wire is fixedly connected to the left end face of the output block and penetrates through an external circuit connected to the inner wall on the left side of the arrangement space, a standby circuit is fixedly connected to the right end face of the output block, the other end of the standby circuit is connected to the left end face of the second input block, a main circuit fixedly connected to the right end face of the output block is arranged on the lower side of the standby circuit, the other end of the main circuit is fixedly connected to the right end face of the first input block, and a fire baffle fixedly connected to the inner wall on the rear side of the arrangement space is arranged in the.

3. The power distribution cabinet capable of automatically replacing the standby circuit according to claim 1, characterized in that: induction mechanism still includes fixed connection the power of arrangement space rear side inner wall, the power right side is equipped with fixed connection and is in the alarm of arrangement space right side inner wall, the alarm the power with first motor passes through first electric wire electricity is connected, first electric wire one end electricity is connected with fixed connection the third iron plate of arrangement space rear side inner wall, first electric wire other end electricity is connected with fixed connection the electrically conductive axle of arrangement space rear side inner wall, it is connected with the fourth iron plate to rotate on the electrically conductive axle.

4. The power distribution cabinet capable of automatically replacing the standby circuit according to claim 1, characterized in that: the fire extinguishing mechanism further comprises a third motor fixedly connected to the inner wall of the rear side of the accommodating space, the third motor is connected with the electromagnet and the second motor through second electric wires, one end of each second electric wire is electrically connected with the corresponding second iron block, the other end of each second electric wire is electrically connected with the corresponding power supply block, the left end face of the third motor is rotatably connected with a third driving shaft, a second baffle is fixedly connected to the third driving shaft, a heat dissipation opening is formed in the inner wall of the left side of the accommodating space, and the heat dissipation opening is located on the upper side of the second baffle.