CN115241771A

CN115241771A - Combined power distribution cabinet

Info

Publication number: CN115241771A
Application number: CN202210957636.XA
Authority: CN
Inventors: 段宝兵; 程士明
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-10-25

Abstract

The invention belongs to the technical field of power distribution cabinets, and discloses a combined power distribution cabinet which comprises a cabinet body, wherein an air inlet is formed in the rear side of the inner wall of the cabinet body, sealing chambers are respectively arranged on the left side and the right side of the inner wall of the cabinet body, rare gas is filled in the inner cavity of each sealing chamber, a fixed cylinder and a sealing block are fixedly arranged on the inner wall of each sealing chamber, a communication port is formed in the middle of each sealing block, a sealing rack and a second spring are hermetically sleeved on the inner wall of each fixed cylinder, and kerosene is filled in the sealing racks. The invention drives the sealing arc plate to be separated from the sealing contact with the surface of the sealing block, simultaneously drives the first sealing column and the first clamping strip to rotate through the meshing relation of the sealing rack and the gear, then enables the first clamping strip to be automatically superposed with the sealing groove, and then pushes the rare gas in the inner cavity of the sealing chamber into the inner cavity of the box body, thereby being capable of driving away the air which is available for combustion in the box body, effectively restraining the development of fire behavior and achieving the purpose of automatic fire safety.

Description

Combined power distribution cabinet

Technical Field

The invention belongs to the technical field of power distribution cabinets, and particularly relates to a combined power distribution cabinet.

Background

The combined power distribution cabinet is internally provided with a plurality of distribution lines and corresponding circuit breakers, is used for controlling electric equipment, is essentially a control terminal for power utilization, is mostly presented by a closed cabinet body, realizes the supply of high-voltage and low-voltage power utilization requirements through the combination of a plurality of cabinet bodies, and is an important control assembly in the electric equipment.

At present, the combined power distribution cabinet can generate fire-fighting accidents caused by aging and burning of internal circuits in the working process, although the fire-fighting accidents caused by aging and burning of the internal circuits can be overcome by regular inspection, the inspection effect is limited, some circuit hidden dangers which are difficult to find are buried, and the combined power distribution cabinet can not be prevented by adopting inflation protection measures, so that the power distribution cabinet which can not be inspected generally has the fire-fighting safety hidden dangers.

Disclosure of Invention

The invention aims to provide a combined power distribution cabinet to solve the problems in the background technology.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a combined power distribution cabinet, includes the box, the rear side of box inner wall is provided with the air intake, sealed room is all installed to the left and right sides of box inner wall, the inner chamber packing of sealed room has rare gas, the inner wall fixed mounting of sealed room has solid fixed cylinder and sealed piece, the intercommunication mouth has been seted up at the middle part of sealed piece, the sealed cover of inner wall of solid fixed cylinder is equipped with sealed rack and No. two springs and has the kerosene through sealed rack packing, the sealed joint of inner wall of sealed room has No. two closing plates, rotate between the bottom of box inner wall and No. two closing plates inside and install a sealed post, the outer fixed surface of a sealed post is connected with the card strip No. one, the top fixed connection of the inside wall of sealed room has a spring and No. two sealed posts that are located sealed room, the outer fixed surface of No. two sealed posts is connected with the card strip No. two, no. two sealed posts and the sealed joint of No. two card strips are at the top of No. two closing plates, the bottom fixed mounting of a sealed post surface has the gear, the gear meshes with the surface of sealed rack, the sealed arc board of box inner wall is provided with the ventilation subassembly.

Preferably, the ventilation subassembly includes the ventilation case, there are fan and vent at the top and the bottom of ventilation incasement wall fixed mounting in proper order, the spliced pole has been cup jointed in the bottom activity of ventilation case, the bottom of spliced pole run through downwards to the inside of seal chamber and with No. two closing plate fixed connection, the top of spliced pole is through a connecting rod fixedly connected with movable plate, a closing plate of bottom fixedly connected with of movable plate, the vent communicates with the inner chamber of box.

Preferably, the diameter value of a sealing plate is greater than the outer diameter value of vent, a sealing plate is made by the block rubber, a connecting rod is made by nylon.

Preferably, the hole of placing has been seted up at the top of No. two closing plates, the seal groove has all been seted up to both sides around placing the downthehole wall, no. two sealed posts and No. two gibs adapt to the joint in proper order inside placing hole, seal groove, the top of a gib block and the spacing contact in bottom of No. two closing plates, a gib block is 90 contained angles with the seal groove, the top of a sealed post and the spacing contact in bottom of No. two sealed posts.

Preferably, both ends of the first spring are respectively and elastically connected with the sealing chamber and the second sealing plate, and the first spring is compressed and arranged between the top of the inner wall of the sealing chamber and the second sealing plate.

Preferably, the rare gas is filled in a space of the inner cavity of the sealing chamber below the second sealing plate in a sealing manner, and a rubber layer is arranged on the outer surface of the second sealing plate and is in sealing contact with the inner walls of the sealing chamber and the box body.

Preferably, the cross section of the sealing arc plate is arc-shaped, and the concave surface of the sealing arc plate is in sealing contact with the outer surface of the sealing block.

Preferably, the second spring is movably sleeved on the outer surface of the sealing rack, two ends of the second spring are respectively and elastically connected with the fixed cylinder and the sealing rack, and the second spring is compressed and arranged inside the fixed cylinder.

Preferably, the number of the communication ports is two and penetrates through the outer surface of the sealing block.

The invention has the following beneficial effects:

1. the fixed cylinder is filled with kerosene, the kerosene is heated and automatically expands in volume when encountering aging combustion of internal circuits of equipment, the sealing racks are pushed to two sides of the box body to drive the sealing arc plate to be separated from sealing contact with the surface of the sealing block, meanwhile, the first sealing column and the first clamping strip are driven to rotate through the meshing relationship between the sealing racks and the gears, the first clamping strip is automatically superposed with the sealing groove, and then rare gas in the inner cavity of the sealing chamber is pushed into the inner cavity of the box body, so that air which can be combusted in the box body can be expelled, the development of fire behavior is effectively restrained, and the purpose of automatic fire fighting safety is achieved.

2. Through being provided with a closing plate and vent after the contact that sealed arc board breaks away from with sealed piece, utilize the suction of fan to discharge the inside remaining air of box and the flue gas that the burning produced, reduce the volume of burning auxiliary material, accelerated the inside gas circulation speed of box on the one hand, improve the discharge amount of noble gas, simultaneously, after a closing plate and vent contact, change the air cycle situation of box inner chamber, avoided the intensity of a fire to outwards stretch.

3. Do not so much take place the extrusion when the closing plate contacts with the vent downwards, thereby the gap between the two is plugged up and sealed effect is played, when the spliced pole moves down to the position of a closing plate and vent contact, the spliced pole continues to move down, at this moment, a connecting rod can also be lastingly stretched and take place deformation, form the shutoff effect after rare gas has been full of the box inner chamber, after sending the police dispatch newspaper, can observe whether the inner chamber of box takes place the gas flow after the staff opens equipment, if there is the line that just explains to take place to age, this has still played the early warning effect simultaneously.

Drawings

FIG. 1 is a schematic front view of the overall structure of the present invention;

FIG. 2 is a schematic view in partial cutaway in elevation of the general structure of the present invention;

FIG. 3 is a schematic structural view of a sealing chamber, a fixed cylinder, a second sealing plate, a first spring, a first sealing column, a first clamping strip, a gear, a sealing arc plate and a connecting rod of the invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is a schematic sectional top view of the general structure of the present invention;

FIG. 6 is a schematic view in partial cutaway in elevation of the general structure of the present invention;

FIG. 7 is a schematic illustration of the separation of the vent assembly, stationary barrel, sealing post, snap strip, gear and sealing arc plate of the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 7 at B in accordance with the present invention;

FIG. 9 is an enlarged view of the structure of FIG. 7 at C in accordance with the present invention;

FIG. 10 is a schematic view of the separation of the seal plate II, the seal post, the first clamp strip and the seal post;

figure 11 is a partially broken away schematic view of the vent assembly of the present invention.

In the figure: 1. a box body; 2. an air inlet; 3. a ventilation box; 4. a sealed chamber; 5. a fixed cylinder; 6. a sealing block; 7. a communication port; 8. a vent; 9. connecting columns; 10. a first connecting rod; 11. moving the plate; 12. a first sealing plate; 13. a fan; 14. a second sealing plate; 15. a first spring; 16. a first sealing column; 17. a first card strip; 18. a gear; 19. sealing the arc plate; 20. sealing the rack; 21. a second spring; 22. a second connecting rod; 23. kerosene; 24. a noble gas; 25. a second sealing column; 26. a second card strip; 27. placing holes; 28. and sealing grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 11, an embodiment of the present invention provides a combined power distribution cabinet, including a box body 1, an air inlet 2 is disposed at the rear side of an inner wall of the box body 1, sealing chambers 4 are mounted on both the left and right sides of the inner wall of the box body 1, a rare gas 24 is filled in an inner cavity of each sealing chamber 4, a fixed cylinder 5 and a sealing block 6 are fixedly mounted on the inner wall of each sealing chamber 4, a communication port 7 is formed in the middle of each sealing block 6, a sealing rack 20 and a second spring 21 are hermetically sealed and arranged on the inner wall of each fixed cylinder 5, kerosene 23 is filled in each sealing rack 20, a second sealing plate 14 is hermetically clamped and connected to the inner wall of each sealing chamber 4, a first sealing column 16 is rotatably mounted between the bottom of the inner wall of the box body 1 and the inside of the second sealing plate 14, a first clamping strip 17 is fixedly connected to the outer surface of the first sealing column 16, a first spring 15 and a second sealing column 25 which are located inside the sealing chamber 4 are fixedly connected to the top of the inner wall of the sealing chamber 4, a second clamping strip 26 is fixedly connected to the outer surface of the second sealing column 25, a gear rack 18 and a second sealing strip 18 are fixedly connected to the outer surface of the inner wall of the sealing plate 14, and a connecting rod 18 which is connected to the inner surface of the sealing rack 18 which is connected to the sealing plate 18, and a sealing plate 18 which is connected to the inner wall of the box body, and a sealing plate 18 which is connected to be meshed with a sealing plate 18, and a sealing plate 18 which is connected to the inner wall of the box body;

when the device is aged in an internal line, the generated heat can be rapidly transmitted to the fixed cylinder 5 and kerosene 23 in the fixed cylinder 5, the kerosene 23 expands in volume, then the sealing rack 20 is pushed to two sides of the box body 1 and compresses the second spring 21, the gear 18 is driven to rotate, on one hand, the second connecting rod 22 and the sealing arc plate 19 are driven to move, the concave surface of the sealing arc plate 19 is separated from the contact with the sealing block 6, the communication port 7 is opened, the rare gas 24 in the inner cavity of the sealing chamber 4 enters the inner cavity of the box body 1 along the communication port 7, meanwhile, after the first sealing column 16 rotates 90 degrees, the first clamping strip 17 is superposed with the sealing groove 28, at the moment, the second sealing plate 14 loses the limiting support from the placing hole 27 and moves downwards under the action of the first spring 15, the second sealing plate 14 pushes the rare gas 24 downwards into the inner cavity of the box body 1 in a sealing clamping manner, and the rare gas 24 is enabled to 'take away' the air for combustion in the box body 1, the effective fire behavior development can be effectively extinguished.

The fixed cylinder 5 is filled with kerosene 23, the compressed second spring 21 acts on the sealing rack 20 and keeps an extrusion contact sealing relationship with the kerosene 23, the kerosene 23 is arranged to sense heat and automatically expand in volume when encountering aging combustion of an internal circuit of equipment, then the sealing rack 20 is pushed to two sides of the box body 1, on one hand, the second connecting rod 22 drives the sealing arc plate 19 to be separated from the sealing contact with the surface of the sealing block 6, meanwhile, the meshing relationship between the sealing rack 20 and the gear 18 drives the first sealing column 16 and the first clamping strip 17 to rotate, then the first clamping strip 17 and the sealing groove 28 are automatically superposed, the second sealing plate 14 is driven downwards under the action of the first spring 15, rare gas 24 in the inner cavity of the sealing chamber 4 is pushed into the inner cavity of the box body 1, so that the air which can be used for combustion in the box body 1 can be driven away, the development of fire behavior is effectively restrained, and the aim of automatic fire safety is fulfilled.

The ventilation assembly comprises a ventilation box 3, a fan 13 and a ventilation opening 8 are sequentially and fixedly installed at the top and the bottom of the inner wall of the ventilation box 3, a connecting column 9 is movably sleeved at the bottom of the ventilation box 3, the bottom end of the connecting column 9 downwards penetrates into the sealing chamber 4 and is fixedly connected with a second sealing plate 14, the top end of the connecting column 9 is fixedly connected with a moving plate 11 through a first connecting rod 10, the bottom of the moving plate 11 is fixedly connected with a first sealing plate 12, and the ventilation opening 8 is communicated with an inner cavity of the box body 1;

then, after the sealing rack 20 drives the second connecting rod 22 and the sealing arc plate 19 to move and the sealing arc plate 19 is separated from sealing contact with the sealing block 6, the second sealing plate 14 continuously moves under the action of the first spring 15 and drives the connecting column 9 and the first connecting rod 10 downwards, so that the moving plate 11 and the first sealing plate 12 move downwards along with the moving plate, before the first sealing plate 12 is contacted with the top of the vent 8, the external circulation speed of the inner cavity of the box body 1 can be increased through the suction force of the fan 13, the speed of rare gas 24 entering the inner cavity of the box body 1 is increased, a part of air can be discharged along a gap between the first sealing plate 12 and the vent 8, when the first sealing plate 12 is contacted with the vent 8, the air inside the box body 1 is in a circulating static state, and at the moment, the fire can be blocked through the blocking of the first sealing plate 12.

After the first sealing plate 12 and the vent 8 are arranged to be separated from the contact with the sealing block 6 through the sealing arc plate 19, residual air in the box body 1 and smoke generated by combustion are discharged by utilizing the suction force of the fan 13, and the rare gas 24 is assisted in the time before the second sealing plate 14 loses the placing hole 27 to support and limit, so that the gas circulation speed in the box body 1 is increased, the discharge amount of the rare gas 24 is increased, meanwhile, after the first sealing plate 12 is in contact with the vent 8, the air circulation condition of the inner cavity of the box body 1 is changed, and the fire is prevented from spreading outwards.

The diameter value of the first sealing plate 12 is larger than the outer diameter value of the vent 8, the first sealing plate 12 is made of a rubber block, and the first connecting rod 10 is made of nylon;

do not so much take place the extrusion when closing plate 12 is downward to contact with vent 8, thereby the gap between the two is plugged up and sealed effect is played, when spliced pole 9 moves down to the position of closing plate 12 with the contact of vent 8, spliced pole 9 continues to move down, at this moment, connecting rod 10 can also be lasted tensile and take place deformation, form the shutoff effect after rare gas 24 has been full of the 1 inner chamber of box, after sending the alarm, whether the staff opens the inner chamber that can observe box 1 behind the equipment and takes place the gas flow, if have just explain that the circuit is ageing, this has still played the early warning effect simultaneously.

The top of the second sealing plate 14 is provided with a placing hole 27, the front side and the rear side of the inner wall of the placing hole 27 are provided with sealing grooves 28, a second sealing column 25 and a second clamping strip 26 are sequentially matched and clamped in the placing hole 27 and the sealing grooves 28 in a clamping mode, the top of the first clamping strip 17 is in limit contact with the bottom of the second sealing plate 14, the first clamping strip 17 and the sealing grooves 28 form an included angle of 90 degrees, and the top end of the first sealing column 16 is in limit contact with the bottom end of the second sealing column 25;

under the initial condition, no. two seal post 25 and No. two card strip 26 seal joint in the upside of placing hole 27 and seal groove 28 inner wall, thereby played the shutoff effect, can seal the joint in placing hole 27 and seal groove 28 after No. one seal post 16 and No. one card strip 17 rotate 90, when No. two seal plate 14 continuously moves down, no. one seal post 16 and No. one card strip 17 just produced sealing connection with placing hole 27 and seal groove 28, do not worry that noble gas 24 upwards escapes.

Wherein, both ends of the first spring 15 are respectively elastically connected with the sealing chamber 4 and the second sealing plate 14, and the first spring 15 is compressed between the top of the inner wall of the sealing chamber 4 and the second sealing plate 14;

no. one spring 15 is used for pushing No. two sealing plates 14 downwards, utilizes its resilience force that is produced by the compression to drive No. two sealing plates 14 and continuously moves down, loses the support spacing back that comes from a calorie of strip 17 No. two sealing plates 14, can move down and push rare gas 24 into the inner chamber of box 1 fast under the effect of a spring 15.

The rare gas 24 is filled in the space of the inner cavity of the sealing chamber 4 below the second sealing plate 14 in a sealing manner, and the outer surface of the second sealing plate 14 is provided with a rubber layer and is in sealing contact with the sealing chamber 4 and the inner wall of the box body 1;

the rare gas 24 is chemically stable, and can effectively prevent the development of fire and insulate heat, and the influence on adjacent equipment is reduced, and the rare gas 24 is positioned below the second sealing plate 14, so that the rare gas 24 is favorably discharged downwards along the communication port 7.

Wherein, the cross section of the sealing arc plate 19 is arc-shaped, and the concave surface of the sealing arc plate 19 is in sealing contact with the outer surface of the sealing block 6;

the sealing arc plate 19 is in pressing contact with the outer surface of the sealing block 6 under the action of the second spring 21 and is used for plugging the communication port 7, rare gas 24 is prevented from escaping along the communication port 7 under the initial condition, and the concave surface of the sealing arc plate 19 can be in contact with the outer surface of the sealing block 6 in a matching mode.

The second spring 21 is movably sleeved on the outer surface of the sealing rack 20, two ends of the second spring 21 are respectively and elastically connected with the fixed cylinder 5 and the sealing rack 20, and the second spring 21 is compressed and arranged in the fixed cylinder 5;

the second spring 21 generates acting force on the sealing rack 20, and then drives the second connecting rod 22 and the sealing arc plate 19 to move and extrude towards the sealing block 6, so that the sealing arc plate 19 is in extrusion contact with the outer surface of the sealing block 6, and the communication port 7 is blocked.

The number of the communication ports 7 is two and penetrates through the outer surface of the sealing block 6; the communication port 7 is used for communicating the inner cavity of the box body 1 with the inner cavity of the sealed chamber 4, and simultaneously provides a passage for the rare gas 24 when escaping.

The working principle and the using process are as follows:

firstly, opening equipment, placing a circuit and controller equipment into the box body 1 and installing the circuit and the controller equipment, and connecting the circuit and communicating with an external circuit through a sealing door of the equipment; rare gas 24 is injected into the bottom of the inner cavity of the sealing chamber 4, and when a circuit in the equipment is aged and burnt, high temperature is generated;

heating kerosene 23 in the fixed cylinder 5 at the same time at a high temperature to enable rare gas 24 to be heated and expanded and push the sealing rack 20 to move towards two sides of the box body 1, compressing the second spring 21, driving the gear 18, the first sealing column 16 and the first clamping strip 17 to rotate by the moving sealing rack 20 through the outer surface, and simultaneously driving the second connecting rod 22 and the sealing arc plate 19 to move to enable the sealing arc plate 19 to be separated from the sealing block 6;

then, the first sealing column 16 and the first clamping strip 17 rotate for 90 degrees and then coincide with the placing hole 27 and the sealing groove 28, at the moment, the second sealing plate 14 is not supported and limited by the second sealing plate 14 any more and is pushed downwards by the first spring 15, and meanwhile, the rare gas 24 is pushed out of the communicating port 7 and enters the inner cavity of the box body 1, so that the air content in the inner cavity of the box body 1 is reduced, the combustion rate is reduced, and the combustion of the circuit is stopped;

meanwhile, the connecting column 9, the connecting rod 10, the moving plate 11 and the sealing plate 12 are driven by the sealing plate 14 moving downwards, the smoke generated by combustion can be sucked away by the suction force from the fan 13 in a moving period before the sealing plate 12 contacts the ventilation opening 8, when the sealing plate 12 contacts the ventilation opening 8, the fan 13 does not generate negative pressure action on the inner cavity of the box body 1 any more, and when the connecting column 9 is driven downwards by the sealing plate 14, the connecting rod 10 is continuously stretched to enable the inner cavity of the box body 1 to be in an air static state, the rare gas 24 can fully fill the inner cavity of the box body 1 and generate outward positive pressure in the air inlet 2 to prevent the invasion of outside air.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a combined power distribution cabinet, includes box (1), the rear side of box (1) inner wall is provided with air intake (2), its characterized in that: the sealing device is characterized in that sealing chambers (4) are respectively arranged on the left side and the right side of the inner wall of the box body (1), rare gas (24) is filled in an inner cavity of each sealing chamber (4), a fixed barrel (5) and a sealing block (6) are fixedly arranged on the inner wall of each sealing chamber (4), a communication port (7) is formed in the middle of each sealing block (6), a sealing rack (20) and a second spring (21) are sleeved on the inner wall of each fixed barrel (5) in a sealing mode, kerosene (23) is filled in the sealing rack (20), a sealing plate (14) is clamped on the inner wall of each sealing chamber (4) in a sealing mode, a first sealing column (16) is rotatably arranged between the bottom of the inner wall of the box body (1) and the inside of the second sealing plate (14), a first clamping strip (17) is fixedly connected to the outer surface of the first sealing column (16), a first spring (15) and a second sealing column (25) which are positioned inside the sealing chamber (4) are fixedly connected to the top of the inner wall of the sealing chamber (4), a second clamping strip (26) is fixedly connected to the outer surface of the second sealing column (25), and a gear (18) are meshed with the sealing column (18), the outer surface of the sealing rack (20) is fixedly connected with a sealing arc plate (19) through a second connecting rod (22), and the top of the inner wall of the box body (1) is provided with a ventilation assembly.

2. The modular switch board of claim 1, characterized in that: the ventilation assembly comprises a ventilation box (3), the top and the bottom of the inner wall of the ventilation box (3) are sequentially and fixedly provided with a fan (13) and a ventilation opening (8), a connecting column (9) is movably sleeved at the bottom of the ventilation box (3), the bottom end of the connecting column (9) downwards penetrates through the inside of a sealing chamber (4) and is fixedly connected with a sealing plate (14) II, the top end of the connecting column (9) is fixedly connected with a movable plate (11) through a connecting rod (10), the bottom of the movable plate (11) is fixedly connected with a sealing plate (12), and the ventilation opening (8) is communicated with the inner cavity of the box body (1).

3. The combined power distribution cabinet according to claim 2, characterized in that: the diameter value of a sealing plate (12) is larger than the outer diameter value of the ventilation opening (8), the sealing plate (12) is made of a rubber block, and the connecting rod (10) is made of nylon.

4. The modular switch board of claim 1, characterized in that: no. two the top of closing plate (14) has been seted up and has been placed hole (27), seal groove (28) have all been seted up to both sides around placing hole (27) inner wall, no. two sealed post (25) and No. two card strip (26) adaptation joint in proper order are inside placing hole (27), seal groove (28), the top of a card strip (17) and the spacing contact in bottom of No. two closing plate (14), a card strip (17) is 90 contained angles with seal groove (28), the top of a sealed post (16) and the spacing contact in bottom of No. two sealed post (25).

5. The combined power distribution cabinet according to claim 1, characterized in that: two ends of the first spring (15) are respectively and elastically connected with the sealing chamber (4) and the second sealing plate (14), and the first spring (15) is compressed and arranged between the top of the inner wall of the sealing chamber (4) and the second sealing plate (14).

6. The combined power distribution cabinet according to claim 1, characterized in that: the rare gas (24) is filled in a space of an inner cavity of the sealing chamber (4) below the second sealing plate (14) in a sealing mode, and a rubber layer is arranged on the outer surface of the second sealing plate (14) and is in sealing contact with the inner walls of the sealing chamber (4) and the box body (1).

7. The combined power distribution cabinet according to claim 1, characterized in that: the cross section of the sealing arc plate (19) is arc-shaped, and the concave surface of the sealing arc plate (19) is in sealing contact with the outer surface of the sealing block (6).

8. The combined power distribution cabinet according to claim 1, characterized in that: no. two springs (21) are movably sleeved on the outer surface of the sealing rack (20), two ends of each second spring (21) are respectively and elastically connected with the fixed cylinder (5) and the sealing rack (20), and the second springs (21) are compressed and arranged inside the fixed cylinders (5).

9. The combined power distribution cabinet according to claim 1, characterized in that: the number of the communication ports (7) is two and penetrates through the outer surface of the sealing block (6).