A switch cabinet body and switch cabinet

Abstract

The present invention relates to the technical field of switch cabinets, and discloses a switch cabinet body and a switch cabinet thereof, wherein side boxes for placing gas tanks are provided on both sides of the switch cabinet body, and a protection box is connected to the middle of the front end of a sealing door; the gas outlet pipe on the top of the gas tank extends into the switch cabinet body and is connected to a valve mechanism, and the driving mechanism also opens the valve mechanism, so that after the circuit breaker enters the interior of the protection box, the valve mechanism at the rear end of the sealing door seals the circuit breaker in the protection box. The circuit breaker of the present invention enters the protection box along the track under the drive of the driving mechanism on the track, and the valve mechanism at the rear end of the sealing door seals the circuit breaker in the protection box, so that the circuit breaker can be kept away from the switch cabinet body, and the circuit breaker is sealed in the protection box, thereby ensuring the safety protection of the circuit breaker. The valve mechanism is opened, so that the carbon dioxide in the gas tank enters the switch cabinet body through the gas outlet pipe, and the carbon dioxide quickly diffuses to each electrical equipment installation room, so as to achieve fire extinguishing and improve safety.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and in particular to a switch cabinet body and a switch cabinet thereof. Background Art

[0002] Switchgear is an electrical equipment, which is mainly used to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The electrical equipment in the switchgear mainly consists of isolating switches, load switches, operating mechanisms, mutual inductors and various protective components, and circuit breakers are used to realize the power supply of various electrical equipment.

[0003] When electrical equipment or wires in a switch cabinet catch fire due to overvoltage operation, an alarm device is usually installed, but it is impossible to achieve power-off protection and synchronous fire extinguishing of each electrical equipment. The protection of electrical equipment is only achieved by installing each electrical equipment in a different electrical equipment installation room, which cannot fundamentally achieve safety protection in the event of a switch cabinet fire. For this reason, we have introduced a switch cabinet body and a switch cabinet thereof. Summary of the invention

[0004] The object of the present invention is to provide a switch cabinet body and a switch cabinet thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A switch cabinet body comprises a switch cabinet body, wherein side boxes for placing gas storage tanks are arranged on both sides of the switch cabinet body, a sealing door is hingedly connected to the front end of the switch cabinet body, and a protection box is connected to the middle of the front end of the sealing door;

[0007] A circuit breaker is slidably connected between the first guide rails on the two side walls of the middle part of the switch cabinet body, and second guide rails are provided on the two side walls of the middle part of the protection box. After the sealing door is closed, the second guide rails are connected with the corresponding first guide rails to form a track;

[0008] The outlet pipe on the top of the gas storage tank extends into the switch cabinet body and is connected to a valve mechanism. The circuit breaker enters the protection box along the track under the drive mechanism on the track. At the same time, the drive mechanism also opens the valve mechanism, so that the carbon dioxide in the gas storage tank enters the switch cabinet body through the outlet pipe;

[0009] After the circuit breaker enters the protection box, the valve mechanism at the rear end of the sealing door seals the circuit breaker in the protection box.

[0010] Preferably, a static contact box is fixed at the rear between the two groups of first guide rails, a static contact hole is provided on the static contact box, and a power plug-in column inserted into the static contact hole is provided at the rear end of the circuit breaker.

[0011] L-shaped slides are fixed on both sides of the circuit breaker, a slot is provided on the front side of the first guide rail, and an insert block is provided on the rear side of the second guide rail. After the sealing door is closed, the insert block is inserted into the corresponding slot, and the L-shaped slide is slidably connected to the track.

[0012] Preferably, the driving mechanism comprises a first motor at the bottom of the first guide rail, a gear mechanism driven by the first motor, a second motor at the bottom of the second guide rail, and a second driving gear driven by the second motor;

[0013] The gear mechanism includes a first driving gear disposed inside the first guide rail and a driven gear meshing with the first driving gear, a first rotating shaft at the output end of the first motor is connected to the middle of the first driving gear, and a winding wheel is fixed to the bottom of the second rotating shaft fixed to the middle of the driven gear after extending out of the first guide rail;

[0014] The rear side of the bottom of the first guide rail is movably connected to a guide wheel through a connecting plate, and the rope on the winding wheel passes through the bottom of the guide wheel and then extends out through the upper end of the first guide rail;

[0015] The inner sides of the first driving gear and the second driving gear extend out through the inner walls of the first guide rail and the second guide rail respectively and then mesh with the transverse rack on the L-shaped slide.

[0016] Preferably, the valve mechanism comprises a sealing disk and an end cap screwed to the inner end of the outlet pipe, a sealing ring is sleeved on the outer side of the inner end of the outlet pipe, and the sealing ring is located inside the end cap;

[0017] The pin rod fixed in the middle of the sealing disk extends into the inside of the air outlet pipe through the circular hole in the middle of the end cover and is then screwed and fixed to the limit disk. A spring is sleeved on the pin rod, and both ends of the spring are located between the limit disk and the end cover.

[0018] The end cover is also provided with an annular air-permeable net located outside the circular hole, and an inclined surface block located outside the annular air-permeable net is fixed on the end cover, and convex blocks are fixed at the upper and lower ends of the sealing disk;

[0019] One end of the rope extending through the upper end of the first guide rail is fixed to the side of the upper protrusion, and a limiting groove is provided in the middle of the side of the sealing disk, and the limiting groove is used for the rope to pass through.

[0020] Preferably, the valve mechanism comprises a push switch fixed at the front end of the interior of the protection box, vertical seats fixed at both sides of the rear end of the sealing door, a third motor fixed at the rear end of the middle part of the vertical seat, and an upper door plate and a lower door plate slidably connected between the two sets of vertical seats;

[0021] The third motor is electrically connected to the push switch, and the first vertical rack is fixed to both sides of the top of the upper door panel through connecting ears, and the second vertical rack is fixed to both sides of the lower door panel. The output end of the third motor extends into the vertical seat and is connected to the valve drive gear, and the valve drive gear is meshed with the corresponding first vertical rack and second vertical rack.

[0022] Preferably, both sides of the lower end of the upper door panel are further provided with card slots. After the circuit breaker enters the protection box, the push switch is pressed to energize the third motor, and the third motor drives the rotation of the valve drive gear to realize the upper door panel and the lower door panel approaching each other and sealing the opening at the rear end of the protection box. At this time, the second guide rail is stuck in the card slot.

[0023] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a switch cabinet, including the switch cabinet body.

[0024] Compared with the prior art, the beneficial effect of the present invention is that the circuit breaker of the present invention enters the protection box along the track under the drive of the driving mechanism on the track, so that the valve mechanism at the rear end of the sealing door seals the circuit breaker in the protection box, so that the circuit breaker can be kept away from the switch cabinet body and the circuit breaker is sealed inside the protection box, thereby ensuring the safety protection of the circuit breaker.

[0025] At the same time, the driving mechanism also opens the valve mechanism, allowing the carbon dioxide in the gas tank to enter the switch cabinet through the outlet pipe. The carbon dioxide quickly diffuses to each electrical equipment installation room, achieving fire extinguishing and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the exploded structure of the overall assembly of the present invention;

[0027] Figure 2 It is a schematic diagram of the exploded structure of the circuit breaker, the first guide rail and the second guide rail connected to each other according to the present invention;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the connection between the gear mechanism, the guide wheel, the rope and the sealing disk of the present invention;

[0029] Figure 4 It is a schematic diagram of the exploded structure of the drive mechanism and the first guide rail of the present invention connected with the valve mechanism after being assembled;

[0030] Figure 5 It is a schematic diagram of the exploded structure of the assembly of the limit plate, spring, end cover and sealing plate of the present invention;

[0031] Figure 6 It is a schematic cross-sectional structure diagram of the present invention when the sealing disk seals the annular air-permeable net under the action of the spring elastic force;

[0032] Figure 7 It is a schematic cross-sectional view of the structure of the present invention when the protrusion slides onto the inclined surface block and leaks out the annular air-permeable net;

[0033] Figure 8 It is a schematic diagram of the exploded structure of the connection between the first vertical rack, the second vertical rack and the valve driving gear of the present invention;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the upper door panel and the lower door panel of the present invention when they are closed;

[0035] Fig.10 It is a schematic diagram of the three-dimensional structure of the circuit breaker of the present invention installed in the switch cabinet body;

[0036] Fig.11 It is a cross-sectional structural schematic diagram of the circuit breaker of the present invention installed in the switch cabinet body;

[0037] Fig.12 It is a schematic cross-sectional view of the circuit breaker of the present invention after entering the protection box.

[0038] In the figure: 1, static contact box; 101, static contact hole; 2, first guide rail; 201, slot; 3, connecting plate; 4, guide wheel; 5, rope; 6, winding wheel; 7, driven gear; 8, first driving gear; 9, first motor; 10, first rotating shaft; 11, second rotating shaft; 12, sealing disk; 121, protrusion; 122, limit groove; 13, pin rod; 14, air storage tank; 15, air outlet pipe; 16, end cover; 161, annular air permeable net; 162, inclined block; 163, round hole; 17, spring; 18, limit disk; 19, sealing ring ; 20. Circuit breaker; 21. Horizontal rack; 22. L-shaped slide; 23. Power plug-in column; 24. Side box; 25. Switch cabinet body; 251. Shelf; 26. Upper door panel; 261. Connecting ear; 262. First vertical rack; 263. Slot; 27. Sealing door; 28. Vertical seat; 29. ​​Protection box; 30. Second motor; 31. Second guide rail; 32. Lower door panel; 321. Second vertical rack; 33. Insert block; 34. Third motor; 35. Valve drive gear; 36. Push switch; 37. Second drive gear. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-12 , the present invention provides a technical solution: Embodiment 1:

[0041] A switch cabinet body, comprising a switch cabinet body 25, wherein a plurality of electrical equipment installation rooms are formed inside the switch cabinet body 25 through a layer plate 251, and side boxes 24 for placing a gas storage tank 14 are provided on both sides of the switch cabinet body 25, wherein the gas storage tank 14 is a high-pressure gas storage tank, so that the carbon dioxide inside the gas storage tank can be quickly sprayed into the switch cabinet body 25 when it flows out through an outlet pipe 15;

[0042] A sealed door 27 is hinged at the front end of the switch cabinet body 25, a protection box 29 is connected to the middle of the front end of the sealed door 27, and an opening located on the sealed door 27 is provided at the rear end of the protection box 29;

[0043] A circuit breaker 20 is slidably connected between the first guide rails 2 on the two side walls in the middle of the switch cabinet body 25, and a static contact box 1 is fixed to the rear between the two groups of first guide rails 2. The static contact box 1 is also provided with a static contact hole 101, and a power plug-in column 23 inserted into the static contact hole 101 is provided at the rear end of the circuit breaker 20.

[0044] Open the sealed door 27, install the circuit breaker 20 on the left and right sets of first guide rails 2, so that the L-shaped slide 22 on the circuit breaker 20 is slidably connected to the first guide rail 2, and then push the circuit breaker 20 backward until the power plug post 23 is inserted into the static contact hole 101, so that all electrical equipment in the electrical equipment installation room are energized through the circuit breaker 20, and finally close the sealed door 27;

[0045] The second guide rails 31 are provided on both side walls of the middle part of the protection box 29. After the sealing door 27 is closed, the second guide rails 31 are connected with the corresponding first guide rails 2 to form a track.

[0046] An L-shaped slide 22 is fixed on both sides of the circuit breaker 20, a slot 201 is provided on the front side of the first guide rail 2, and an insert block 33 is provided on the rear side of the second guide rail 31. After the sealing door 27 is closed, the insert block 33 is inserted into the corresponding slot 201, and the L-shaped slide 22 is slidably connected to the track.

[0047] The outlet pipe 15 on the top of the gas storage tank 14 extends into the switch cabinet body 25 and is connected to a valve mechanism. The circuit breaker 20 is driven by the driving mechanism on the track to enter the protection box 29 along the track. At the same time, the driving mechanism also opens the valve mechanism, so that the carbon dioxide in the gas storage tank 14 enters the switch cabinet body 25 through the outlet pipe 15;

[0048] The driving mechanism includes a first motor 9 at the bottom of the first guide rail 2, a gear mechanism driven by the first motor 9, a second motor 30 at the bottom of the second guide rail 31, and a second driving gear 37 driven by the second motor 30;

[0049] The gear mechanism includes a first driving gear 8 provided inside the first guide rail 2 and a driven gear 7 meshing with the first driving gear 8, a first rotating shaft 10 at the output end of the first motor 9 is connected to the middle of the first driving gear 8, and a second rotating shaft 11 fixed to the middle of the driven gear 7 extends out of the first guide rail 2 and is fixed with a winding wheel 6;

[0050] The bottom rear side of the first guide rail 2 is movably connected to a guide wheel 4 through a connecting plate 3, and the rope 5 on the winding wheel 6 passes through the bottom of the guide wheel 4 and then extends out through the upper end of the first guide rail 2;

[0051] The inner sides of the first driving gear 8 and the second driving gear 37 extend out through the inner walls of the first guide rail 2 and the second guide rail 31 respectively and then mesh with the transverse rack 21 on the L-shaped slide 22 .

[0052] The valve mechanism includes a sealing disk 12 and an end cap 16 screwed to the inner end of the outlet pipe 15. A sealing ring 19 is sleeved on the outer side of the inner end of the outlet pipe 15. The sealing ring 19 is located inside the end cap 16.

[0053] The pin rod 13 fixed in the middle of the sealing disk 12 extends into the inside of the air outlet pipe 15 through the circular hole 163 in the middle of the end cover 16 and is then screwed and fixed to the limit disk 18. The pin rod 13 is sleeved with a spring 17, and the two ends of the spring 17 are located between the limit disk 18 and the end cover 16.

[0054] The end cover 16 is also provided with an annular air-permeable net 161 located outside the circular hole 163, and an inclined surface block 162 located outside the annular air-permeable net 161 is fixed to the end cover 16. The sealing disk 12 is fixed with protrusions 121 at both ends.

[0055] The end of the rope 5 extending from the upper end of the first guide rail 2 is fixed to the side of the upper protrusion 121, and a limiting groove 122 is provided in the middle of the side of the sealing disk 12 for the rope 5 to pass through (such as Figure 3 as shown).

[0056] Under the elastic force of the spring 17 on the limit plate 18, the limit plate 18 pulls the sealing plate 12 through the pin rod 13 until the sealing plate 12 is tightly attached to the inner end surface of the end cover 16, so that the sealing plate 12 seals the annular air permeable net 161 (such as Figure 6 The carbon dioxide entering the air outlet pipe 15 cannot be ejected through the air outlet pipe 15 . At this time, the projection 121 has not slid onto the inclined surface block 162 .

[0057] When the rope 5 pulls the upper protrusion 121, the sealing disk 12 rotates until the protrusion 121 slides onto the inclined block 162. At this time, the sealing disk 12 is no longer tightly attached to the inner end surface of the end cover 16, and the annular air permeable net 161 leaks out (such as Figure 7The carbon dioxide entering the outlet pipe 15 is then ejected into the switch cabinet body 25 through the annular air permeable net 161, and the carbon dioxide quickly diffuses into each electrical equipment installation room to achieve fire extinguishing.

[0058] After the circuit breaker 20 enters the protection box 29 , the valve mechanism at the rear end of the sealing door 27 seals the circuit breaker 20 in the protection box 29 .

[0059] The valve mechanism includes a push switch 36 fixed to the front end of the protection box 29, vertical seats 28 fixed to both sides of the rear end of the sealing door 27, a third motor 34 fixed to the middle and rear end of the vertical seats 28, and an upper door plate 26 and a lower door plate 32 slidably connected between the two sets of vertical seats 28;

[0060] The third motor 34 is electrically connected to the push switch 36, and the first vertical rack 262 is fixed to both sides of the top of the upper door panel 26 through connecting ears 261, and the second vertical rack 321 is fixed to both sides of the lower door panel 32. The output end of the third motor 34 extends into the vertical seat 28 and is connected to the valve driving gear 35, and the valve driving gear 35 is meshed with the corresponding first vertical rack 262 and the second vertical rack 321.

[0061] The upper door panel 26 is also provided with card slots 263 on both sides of the lower end. After the circuit breaker 20 enters the protection box 29, the push switch 36 is pressed to power on the third motor 34. The third motor 34 drives the valve driving gear 35 to rotate to make the upper door panel 26 and the lower door panel 32 approach each other and seal the opening at the rear end of the protection box 29. At this time, the second guide rail 31 is stuck in the card slot 263. Such a setting can prevent the upper door panel 26 and the lower door panel 32 from being unable to close and seal due to the obstruction of the second guide rail 31.

[0062] The first motor 9 and the second motor 30 are both controlled by the PLC controller. A smoke sensor (model JTY-GD-T12) and a temperature sensor (model ARTM-8 8-way PT temperature sensor) electrically connected to the PLC controller are provided inside the switch cabinet body 25. The smoke sensor is used to detect the smoke concentration inside the switch cabinet body 25, and the temperature sensor is used to detect the temperature inside the switch cabinet body 25.

[0063] When the electrical equipment or wires inside the switch cabinet body 25 catch fire due to overvoltage operation, the smoke sensor detects that the smoke concentration inside the switch cabinet body 25 exceeds the safety threshold or the temperature sensor detects that the temperature inside the switch cabinet body 25 exceeds the safety threshold, the PLC controller immediately controls the first motor 9 and the second motor 30 to work, so that the circuit breaker 20 enters the protection box 29, the circuit breaker 20 is away from the switch cabinet body 25, and the power plug-in column 23 is separated from the static contact hole 101, so that all electrical equipment inside the electrical equipment installation room are powered off;

[0064] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a switch cabinet, including the switch cabinet body.

[0065] Specifically, when in use, the first motor 9 and the second motor 30 work synchronously, the first motor 9 drives the first driving gear 8 to rotate, and the second motor 30 drives the second driving gear 37 to rotate;

[0066] The first driving gear 8 and the second driving gear 37 drive the L-shaped slide 22 to move forward along the first guide rail 2 through the transverse rack 21 on the L-shaped slide 22. When the transverse rack 21 leaves the first driving gear 8 (the PLC controller stops the first motor 9 from working), the L-shaped slide 22 slides to the second guide rail 31, and the second driving gear 37 still engages with the transverse rack 21 to continue to move the circuit breaker 20 forward until the circuit breaker 20 moves into the protection box 29. Then, the PLC controller stops the second motor 30 from working.

[0067] The circuit breaker 20 enters the protection box 29, the circuit breaker 20 is away from the switch cabinet body 25, and the power plug-in column 23 is separated from the static contact hole 101, so that all electrical equipment in the electrical equipment installation room are powered off;

[0068] like Figure 3 As shown, when the first driving gear 8 rotates, the first driving gear 8 drives the winding wheel 6 to rotate through the driven gear 7, so that the winding wheel 6 winds up the rope 5. At this time, when the rope 5 pulls the upper protrusion 121, the sealing disk 12 rotates until the protrusion 121 slides onto the inclined surface block 162. At this time, the sealing disk 12 is no longer tightly attached to the inner end surface of the end cover 16, and the annular air permeable net 161 leaks out (as shown in FIG. Figure 7 The carbon dioxide entering the outlet pipe 15 is then ejected into the switch cabinet body 25 through the annular air permeable net 161, and the carbon dioxide quickly diffuses into each electrical equipment installation room to achieve fire extinguishing.

[0069] After the circuit breaker 20 enters the protection box 29, the front end of the circuit breaker 20 abuts against the push switch 36, and the push switch 36 is pressed, so that the third motor 34 is powered on, and the third motor 34 drives the valve drive gear 35 to rotate to make the upper door plate 26 and the lower door plate 32 approach each other and seal the opening at the rear end of the protection box 29. At this time, the second guide rail 31 is stuck in the slot 263 (such as Fig. 9 as shown).

[0070] The upper door plate 26 and the lower door plate 32 are closed to seal the circuit breaker 20 inside the protection box 29 , so that the circuit breaker 20 is away from the switch cabinet body 25 .

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A switch cabinet body, comprising a switch cabinet body, characterized in that: Side boxes for placing gas storage tanks are provided on both sides of the switch cabinet body. A sealed door is hinged at the front end of the switch cabinet body, and a protection box is connected to the middle of the front end of the sealed door. A circuit breaker is slidably connected between the first guide rails on the two side walls of the middle part of the switch cabinet body, and a second guide rail is provided on the two side walls of the middle part of the protection box. After the sealing door is closed, the second guide rail is connected with the corresponding first guide rail to form a track; The outlet pipe on the top of the gas storage tank extends into the switch cabinet body and is connected to a valve mechanism. The circuit breaker enters the protection box along the track driven by the driving mechanism on the track. The driving mechanism opens the valve mechanism, allowing the carbon dioxide in the gas storage tank to enter the switch cabinet body through the outlet pipe; After the circuit breaker enters the protection box, the valve mechanism at the rear end of the sealing door seals the circuit breaker in the protection box; L-shaped slides are fixed on both sides of the circuit breaker. A slot is provided on the front side of the first guide rail, and an insert is provided on the rear side of the second guide rail. After the sealing door is closed, the insert is inserted into the corresponding slot, and the L-shaped slide is slidably connected to the rail. The driving mechanism includes a first motor at the bottom of the first guide rail, a gear mechanism driven by the first motor, a second motor at the bottom of the second guide rail, and a second driving gear driven by the second motor; The gear mechanism includes a first driving gear provided inside the first guide rail and a driven gear meshing with the first driving gear, a first rotating shaft at the output end of the first motor is connected to the middle of the first driving gear, and a winding wheel is fixed to the bottom of the second rotating shaft fixed to the middle of the driven gear after extending out of the first guide rail; The rear side of the bottom of the first guide rail is movably connected to a guide wheel through a connecting plate, and the rope on the winding wheel passes through the bottom of the guide wheel and then extends out through the upper end of the first guide rail; The inner sides of the first driving gear and the second driving gear extend through the inner walls of the first guide rail and the second guide rail respectively and then mesh with the transverse rack on the L-shaped slide; The valve mechanism is connected to the rope.

2. A switch cabinet body according to claim 1, characterized in that: A static contact box is fixed at the rear between the two groups of first guide rails, a static contact hole is provided on the static contact box, and a power plug-in column inserted into the static contact hole is provided at the rear end of the circuit breaker.

3. A switch cabinet body according to claim 1, characterized in that: The valve mechanism includes a sealing disk and an end cover screwed to the inner end of the outlet pipe, a sealing ring is sleeved on the outer side of the inner end of the outlet pipe, and the sealing ring is located inside the end cover; The pin rod fixed in the middle of the sealing disk extends into the inside of the air outlet pipe through the circular hole in the middle of the end cover and is then screwed to fix the limit disk. A spring is sleeved on the pin rod, and both ends of the spring are located between the limit disk and the end cover. The end cover is also provided with an annular air-permeable net located outside the circular hole, and an inclined surface block located outside the annular air-permeable net is fixed on the end cover, and convex blocks are fixed at the upper and lower ends of the sealing disk; One end of the rope extending through the upper end of the first guide rail is fixed to the side of the upper protrusion, and a limiting groove is provided in the middle of the side of the sealing disk, and the limiting groove is used for the rope to pass through.

4. A switch cabinet body according to claim 1, characterized in that: The valve mechanism includes a push switch fixed at the front end of the protection box, vertical seats fixed at both sides of the rear end of the sealing door, a third motor fixed at the middle rear end of the vertical seat, and an upper door plate and a lower door plate slidably connected between the two sets of vertical seats; The third motor is electrically connected to the push switch. The first vertical rack is fixed on both sides of the top of the upper door panel through connecting ears, and the second vertical rack is fixed on both sides of the lower door panel. The output end of the third motor extends into the vertical seat and is connected to the valve drive gear. The valve drive gear is meshed with the corresponding first vertical rack and second vertical rack.

5. A switch cabinet body according to claim 4, characterized in that: There are also card slots on both sides of the lower end of the upper door panel. After the circuit breaker enters the protection box, the push switch is pressed to energize the third motor. The third motor drives the rotation of the valve drive gear to make the upper door panel and the lower door panel approach each other and seal the opening at the rear end of the protection box. At this time, the second guide rail is stuck in the card slot.

6. A switch cabinet, characterized in that: It comprises a switch cabinet body as claimed in any one of claims 1 to 5.

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