Power distribution cabinet with fireproof structure
By introducing flame sensors, automatic fire extinguishing systems and closed heat dissipation tanks into the distribution cabinet, the problem that traditional distribution cabinets cannot automatically extinguish fires when fires occur, and the automatic extinguishing of fires inside the distribution cabinets and the prevention of fire expansion are achieved.
Patent Information
- Application Number
- CN202421787310.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-26
AI Technical Summary
When a traditional power distribution cabinet has a short circuit and fire accident, the internal fire does not have the function of automatic fire extinguishing. The flame can be burned to the outside through the heat dissipation hole, causing greater fire losses.
A distribution cabinet with a fire-resistant structure is designed, equipped with flame sensors, controllers, pull rods, motors, mobile racks, shunt tubes, observation windows and clamping bolts. The flame is sensed by the flame sensor, and the controller controls the motor to drive the threaded rod and the moving frame, closes the heat dissipation groove, and automatically sprays carbon dioxide through the universal bamboo tube and the spray cylinder system to extinguish the fire.
It realizes automatic fire extinguishing of the electrical components inside the distribution cabinet, prevents the fire from expanding, reduces the degree of equipment damage, and improves the safety of electrical equipment.
Smart Images
Figure CN223039458U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of distribution cabinets, and more specifically, particularly relates to a distribution cabinet with a fire prevention structure. Background Art
[0002] A distribution cabinet is a cabinet-type device used in a power system to distribute, control, and protect electric energy. It contains various electrical components inside, such as circuit breakers, disconnectors, transformers, indicator lights, etc. These components work together to ensure the normal operation of the power system. Currently, traditional distribution cabinets only store the internal electrical components in a centralized shielding manner to prevent external dust from invading the inside of the distribution cabinet, and ensure the effective heat dissipation of the distribution cabinet by opening air-permeable mesh holes or fence-shaped through grooves on the surface of the cabinet body. However, in the case of large power and complex electrical working conditions, electrical components inside the distribution cabinet may have short-circuit and fire accidents. The distribution cabinet does not have an automatic fire extinguishing function inside, and cannot extinguish the burning equipment in time. The burning electrical components will continuously ignite the intact electrical components in the cabinet, increasing the degree of equipment damage. In addition, the flames inside the distribution cabinet will burn out of the cabinet through the air-permeable mesh holes or fence-shaped through grooves, igniting other combustible objects outside the distribution cabinet, causing greater fire losses. Content of the Utility Model
[0003] In order to solve the above technical problems, the utility model provides a distribution cabinet with a fire prevention structure to solve the problems that the traditional distribution cabinet itself does not have a fire extinguishing function and the flames inside the cabinet burn outside through the heat dissipation holes.
[0004] The utility model provides a distribution cabinet with a fireproof structure, including a footrest; the top end of the footrest is welded and connected with a bottom cabinet, the upper side surface of the bottom cabinet is bolted with a distribution cabinet body, the front side surface of the distribution cabinet body is hinged with a cabinet door, and a door lock is installed on the front side surface of the cabinet door; ten groups of heat dissipation through grooves are arranged on both the left side surface and the right side surface of the distribution cabinet body; it also includes a flame sensor, a controller, a pull rod, a motor, a moving frame, a shunt pipe, an observation window and a clamping bolt; the lower side surface of the controller is bolted with the bottom cabinet, two groups of threaded columns are welded on the upper side surface of the bottom cabinet, fixing nuts are screwed on the outer side surfaces of the threaded columns, the controller is connected with the motor through a wire, and the controller is connected with the flame sensor through a wire; the motor is bolted on the top surface inside the bottom cabinet, a threaded rod is installed on the motor shaft of the motor, the top end of the threaded rod is rotatably connected with a partition plate, a column is welded on the lower side surface of the partition plate, the bottom end of the column is welded and connected with the distribution cabinet body, and an electrical equipment mounting rack is bolted on the inner bottom surface of the distribution cabinet body; closed plates are welded on both the left side surface and the right side surface of the moving frame, a rack is welded on the lower side surface of the right closed plate, a valve opening block is meshed with the rear side tooth surface of the rack, and the valve opening block is rotatably connected with the bottom cabinet; placing frames are welded on both the left end and the right end of the pull rod, and an upper clamping ring is connected to the upper side surface of the placing frame through a clamping bolt; the observation window is adhesively bonded to the cabinet door; the shunt pipe is of an I-shaped structure, an air inlet is arranged at the rear end of the center position of the I-shaped structure of the shunt pipe, an air delivery pipe is screwed to the air inlet of the shunt pipe, a hose is installed at the bottom end of the air delivery pipe, the other end of the hose is installed at the air outlet of a hand-held carbon dioxide fire extinguisher, air outlets are arranged at the four corners of the I-shaped structure of the shunt pipe, a connecting pipe is installed at the bottom end of each air outlet of the shunt pipe, a universal joint bamboo joint pipe is screwed to the bottom end of the connecting pipe, and a spray nozzle is screwed to the bottom end of the universal joint bamboo joint pipe.
[0005] In at least some embodiments, an external tooth structure is arranged on the outer side surface of the valve opening block, the external tooth structure of the valve opening block is meshed with the rear side tooth surface of the rack, a cylindrical convex column is arranged on the left side surface of the valve opening block, a U-shaped opening groove is arranged on the outer side surface of the convex column, and the rotating handle of the hand-held carbon dioxide fire extinguisher is embedded in the U-shaped groove of the convex column of the valve opening block.
[0006] In at least some embodiments, a threaded through hole penetrating up and down is arranged at the center position of the moving frame, the outer side surface of the threaded rod is threadedly meshed with the threaded through hole of the moving frame, and two groups of through holes penetrating up and down are symmetrically arranged on the left side and the right side of the threaded through hole of the moving frame, and the column penetrates through the through hole of the moving frame.
[0007] In at least some embodiments, two groups of vertical plates are provided on the upper side surface of the placement rack. An arc-shaped groove is provided at the top end of each group of vertical plates. A rubber gasket strip is bonded to the inner side surface of the arc-shaped groove. The handwheel type carbon dioxide fire extinguisher bottle body is placed in the arc-shaped groove of the vertical plate of the placement rack. Ear plates are provided on both the front side and the rear side of the vertical plate. Threaded through holes penetrating up and down are provided on each group of ear plates. Fixing bolts are screwed into the threaded through holes of the ear plates of the placement rack. Two groups of long strip through grooves are provided on the lower side surface of the placement rack. Two threaded columns are respectively inserted into the long strip through grooves of the placement rack.
[0008] In at least some embodiments, the number of the upper clamping rings is two groups. Ear plates are provided at both the front end and the rear end of each group of upper clamping rings. Through holes are provided on the upper side surfaces of the ear plates. The through holes of the ear plates of the upper clamping rings are vertically opposite to the threaded through holes of the ear plates of the vertical plates of the placement rack. Clamping bolts are inserted into the through holes of the ear plates of the upper clamping rings.
[0009] In at least some embodiments, a rectangular through groove is provided on the front side surface of the cabinet door. An observation window is bonded inside the rectangular through groove. The observation window is made of calcium borosilicate glass material. A flame sensor is connected to the rear side surface of the cabinet door through bolts.
[0010] Compared with the prior art, the utility model has the following beneficial effects:
[0011] 1. In the utility model, through the flexible connection structure formed by the universal bellows tube between the spray nozzle and the connecting pipe, the spray nozzle orientation can be flexibly changed, so that the four spray nozzles can adjust and align the carbon dioxide injection direction according to the different positions of the electrical components on the electrical equipment mounting rack, making the carbon dioxide gas more accurately sprayed on the burning electrical components and improving the fire extinguishing efficiency of the electrical equipment.
[0012] 2. In the utility model, the flame sensor senses the flame of the electrical components on the electrical equipment mounting rack and sends an induction control signal to the controller, so that the controller controls the motor to drive the threaded rod and the threaded through hole of the moving rack to form a threaded meshing transmission mechanism, driving the closed plates welded to the left and right ends of the moving rack to move vertically synchronously along the column, so that the two closed plates shield and block the heat dissipation through grooves of the distribution cabinet body, preventing the flame from burning to the external objects of the distribution cabinet body through the heat dissipation through grooves and preventing the fire from spreading.
[0013] 3. In the utility model, during the downward movement of the right closed plate, the closed plate drives the rack to form a gear-rack meshing transmission mechanism at the external tooth structure of the valve opening block, so that the rack drives the convex column U-shaped slot on the left side surface of the valve opening block to rotate. The U-shaped slot of the valve opening block drives the handle of the handwheel type carbon dioxide fire extinguisher embedded inside to rotate synchronously, completing the valve opening work of the handwheel type carbon dioxide fire extinguisher, and allowing the high-pressure carbon dioxide gas to pass through the hose, gas transmission pipe, shunt pipe, connecting pipe and universal bellows tube in sequence and finally spray out from the spray nozzle, realizing the automatic fire extinguishing work for the burning electrical components inside the distribution cabinet. Description of the Drawings
[0014] Figure 1 It is a schematic structural view of the present utility model.
[0015] Figure 2 It is a schematic structural view of the bottom and side views of the present utility model.
[0016] Figure 3 It is a schematic front view structural view of the present utility model.
[0017] Figure 4 It is the Figure 2 schematic enlarged structural view of part A in the present utility model.
[0018] Figure 5 It is the Figure 3 schematic enlarged structural view of part B in the present utility model.
[0019] Figure 6 It is the schematic sectional view of the present utility model.
[0020] Reference numerals: 1, distribution cabinet body; 2, bottom cabinet; 3, cabinet door; 4, door lock; 5, flame sensor; 6, footrest; 7, partition board; 8, closing plate; 9, controller; 10, placement rack; 11, threaded column; 12, fixing nut; 13, handwheel type carbon dioxide fire extinguisher; 14, upper clamping ring; 15, rack; 16, valve opening block; 17, pull rod; 18, motor; 19, column; 20, electrical equipment mounting rack; 21, threaded rod; 22, moving rack; 23, shunt pipe; 24, spray barrel; 25, universal corrugated pipe; 26, connecting pipe; 27, observation window; 28, hose; 29, gas transmission pipe; 30, clamping bolt. Specific embodiments
[0021] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.
[0022] Such as Figures 1 - 6As shown in the figure, the utility model provides a distribution cabinet with a fireproof structure, including a footrest 6; the top end of the footrest 6 is welded and connected with a bottom cabinet 2, the upper side of the bottom cabinet 2 is bolted with a distribution cabinet body 1, the front side of the distribution cabinet body 1 is hinged with a cabinet door 3, and a door lock 4 is installed on the front side of the cabinet door 3; ten groups of heat dissipation through grooves are arranged on both the left side and the right side of the distribution cabinet body 1; it also includes a flame sensor 5, a controller 9, a pull rod 17, a motor 18, a moving frame 22, a shunt pipe 23, an observation window 27 and a clamping bolt 30; the lower side of the controller 9 is bolted with the bottom cabinet 2, two groups of threaded columns 11 are welded on the upper side of the bottom cabinet 2, fixing nuts 12 are screwed on the outer sides of the threaded columns 11, the controller 9 is connected with the motor 18 through a wire, and the controller 9 is connected with the flame sensor 5 through a wire; the motor 18 is bolted on the top surface inside the bottom cabinet 2, a threaded rod 21 is installed on the motor shaft of the motor 18, the top end of the threaded rod 21 is rotatably connected with a partition plate 7, a column 19 is welded on the lower side of the partition plate 7, the bottom end of the column 19 is welded with the distribution cabinet body 1, and an electrical equipment mounting rack 20 is bolted on the inner bottom surface of the distribution cabinet body 1; closing plates 8 are welded on both the left side and the right side of the moving frame 22, a rack 15 is welded on the lower side of the right closing plate 8, a valve opening block 16 is meshed with the rear side of the rack 15, and the valve opening block 16 is rotatably connected with the bottom cabinet 2; placing frames 10 are welded on both the left end and the right end of the pull rod 17, and an upper clamping ring 14 is connected to the upper side of the placing frame 10 through a clamping bolt 30; the observation window 27 is adhesively connected to the outer side of the cabinet door 3; the shunt pipe 23 is of an I-shaped structure, an air inlet is arranged at the rear end of the center position of the I-shaped structure of the shunt pipe 23, an air delivery pipe 29 is screwed on the air inlet of the shunt pipe 23, a flexible pipe 28 is installed at the bottom end of the air delivery pipe 29, the other end of the flexible pipe 28 is installed at the air outlet 13 of a hand-held carbon dioxide fire extinguisher, air outlets are arranged at the four corners of the I-shaped structure of the shunt pipe 23, a connecting pipe 26 is installed at the bottom end of each air outlet of the shunt pipe 23, a universal joint bamboo joint pipe 25 is screwed on the bottom end of the connecting pipe 26, and a spray barrel 24 is screwed on the bottom end of the universal joint bamboo joint pipe 25.
[0023] In the embodiment of the present disclosure, an external tooth structure is arranged on the outer side of the valve opening block 16, the external tooth structure of the valve opening block 16 is meshed with the rear tooth surface of the rack 15, a cylindrical convex column is arranged on the left side of the valve opening block 16, a U-shaped opening groove is arranged on the outer side of the convex column, the rotating handle of the hand-held carbon dioxide fire extinguisher 13 is embedded in the U-shaped groove of the convex column of the valve opening block 16. During the downward movement of the rack 15, the rack 15 drives the U-shaped groove of the convex column on the left side of the valve opening block 16 to rotate, and the U-shaped groove of the valve opening block 16 drives the rotating handle of the hand-held carbon dioxide fire extinguisher 13 to rotate, so that the handwheel valve of the hand-held carbon dioxide fire extinguisher 13 is opened, and the hand-held carbon dioxide fire extinguisher 13 fills the flexible pipe 28 with high-pressure carbon dioxide gas and finally transports it to the spray barrel 24 for spraying to carry out the fire extinguishing work.
[0024] In the embodiment of the present disclosure, a threaded through hole penetrating up and down is provided at the central position of the movable frame 22. The outer side surface of the threaded rod 21 is threadedly engaged and connected in the threaded through hole of the movable frame 22. On the left and right ends of the threaded through hole of the movable frame 22, two groups of through holes penetrating up and down are symmetrically provided. The upright column 19 is inserted into the through holes of the movable frame 22. During the rotation of the threaded rod 21, the movable frame 22 is driven to move vertically up and down along the upright column 19, so that the movable frame 22 drives the closed plates 8 welded to the left and right sides to cover and shield the heat dissipation through grooves on the left and right sides of the power distribution cabinet body 1, preventing the flames from flying out of the heat dissipation through grooves of the power distribution cabinet body 1 and igniting external objects, and reducing the fire loss.
[0025] In the embodiment of the present disclosure, two groups of vertical plates are provided on the upper side surface of the placement rack 10. An arc-shaped groove is provided at the top end of each group of vertical plates. A rubber gasket is adhesively bonded to the inner side surface of the arc-shaped groove. The bottle body of the handwheel type carbon dioxide fire extinguisher 13 is placed in the arc-shaped groove of the vertical plate of the placement rack 10. Ear plates are provided on the front and rear side surfaces of the vertical plate. Threaded through holes penetrating up and down are provided on each group of ear plates. A fixing bolt 30 is screwed into the threaded through hole of the ear plate of the placement rack 10. Two groups of long strip through grooves are provided on the lower side surface of the placement rack 10. Two groups of threaded columns 11 are respectively inserted into the long strip through grooves of the placement rack 10, so that the placement rack 10 slides back and forth along the two groups of threaded columns 11, and the handwheel type carbon dioxide fire extinguisher 13 placed in the arc-shaped groove of the placement rack 10 is moved into or out of the bottom cabinet 2, facilitating the replacement and disassembly of the handwheel type carbon dioxide fire extinguisher 13.
[0026] In the embodiment of the present disclosure, the number of the upper clamping rings 14 is two groups. Ear plates are provided at the front and rear ends of each group of upper clamping rings 14. Through holes are provided on the upper side surfaces of the ear plates. The through holes of the ear plates of the upper clamping rings 14 and the threaded through holes of the ear plates of the vertical plates of the placement rack 10 are vertically opposite. The clamping bolts 30 are inserted into the through holes of the ear plates of the upper clamping rings 14. The upper clamping rings 14 cooperate with the groove of the vertical plate of the placement rack 10 to clamp and fix the handwheel type carbon dioxide fire extinguisher 13, avoiding the synchronous rotation of the bottle body and the handle of the handwheel type carbon dioxide fire extinguisher 13, and ensuring the stable opening of the valve of the handwheel type carbon dioxide fire extinguisher 13.
[0027] In the embodiment of the present disclosure, a rectangular through groove is provided on the front side surface of the cabinet door 3. An observation window 27 is adhesively bonded inside the rectangular through groove. The observation window 27 is made of calcium borosilicate glass material. Utilizing the excellent fireproof performance and light transmission performance of the calcium borosilicate glass material, it is convenient to observe the combustion situation inside the cabinet on the basis of isolating the flame. A flame sensor 5 is connected to the rear side surface of the cabinet door 3 by bolts. When the cabinet door 3 is closed with the power distribution cabinet body 1, the flame sensor 5 is opposite to the electrical equipment mounting rack 20 front and back, so that the flame sensor 5 can clearly observe the flame combustion situation of the electrical equipment mounted on the electrical equipment mounting rack 20 and send a flame induction control signal to the controller 9.
[0028] The specific usage mode and function of this embodiment:
[0029] When the utility model conducts fire prevention work on the distribution cabinet, manually turn the universal bellows tube 25 to adjust the orientation of the nozzle 24 of the universal bellows tube 25 according to the installation position of the electrical components on the electrical equipment mounting rack 20, so that the four nozzles 24 are aligned with the electrical components on the electrical equipment mounting rack 20. If a flame is generated after the electrical components installed on the front side of the electrical equipment mounting rack 20 catch fire, the flame sensor 5 on the front side opposite to the electrical equipment mounting rack 20 senses the flame, and the flame sensor 5 sends an induction control signal to the controller 9. Then, the controller 9 controls the motor 18 to start, and the motor 18 drives the threaded rod 21 to rotate. Since the outer side of the threaded rod 21 is threadedly engaged in the threaded through hole of the moving frame 22, the threaded rod 21 drives the moving frame 22 to move vertically downward along the column 19. At this time, the moving frame 22 drives the two closed plates 8 welded to the left side and the right side to move downward synchronously. The closed plates 8 block the heat dissipation through grooves on the left side and the right side of the distribution cabinet body 1 to prevent the flame from flowing outside the distribution cabinet. The closed plate 8 pushes the rack 15 downward. Since the tooth surface on the rear side of the rack 15 is engaged with the external tooth structure on the outer side of the valve opening block 16, the rack 15 drives the valve opening block 16 to rotate, and the U-shaped opening groove of the convex column on the left side of the valve opening block 16 rotates synchronously. Since the handle of the hand-held carbon dioxide fire extinguisher 13 is embedded in the U-shaped opening groove of the valve opening block 16, the U-shaped opening groove of the valve opening block 16 drives the handle of the hand-held carbon dioxide fire extinguisher 13 to rotate, so that the valve of the hand-held carbon dioxide fire extinguisher 13 is opened. Then, the high-pressure gas in the hand-held carbon dioxide fire extinguisher 13 is filled into the hose 28 and flows to the air delivery pipe 29, and then is conveyed to the I-shaped manifold pipe 23 by the air delivery pipe 29. After that, it is conveyed to the four connecting pipes 26 through the air outlet ports at the four corners of the bottom of the I-shaped structure of the manifold pipe 23. Finally, it flows out of the nozzle 24 through the universal bellows tube 25 screwed to the bottom of the connecting pipe 26, and the carbon dioxide gas is sprayed at high pressure towards the electrical components on the electrical equipment mounting rack 20 to conduct suffocation fire extinguishing work on the burning electrical components.
[0030] The installation methods, connection methods or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc. And the specific structures, models and coefficient indexes of all its components are its own technologies, and any implementation that can achieve its beneficial effects can be carried out. The above-mentioned door lock 4, flame sensor 5, controller 9, hand-held carbon dioxide fire extinguisher 13 and motor 18 are all common devices on the market. When purchased and used, only need to be connected according to the operation manual purchased together to be used, so it will not be elaborated here.
[0031] The technical solution of the utility model is not limited to the scope of the embodiments of the utility model. The technical content not described in detail in the utility model is well-known technology.
Claims
1. A power distribution cabinet with a fireproof structure, comprising a foot base; the top of the foot base is welded to a bottom cabinet, the upper side of the bottom cabinet is bolted to a power distribution cabinet, the front side of the power distribution cabinet is hinged with a cabinet door, and the front side of the cabinet door is equipped with a door lock; the left side and the right side of the power distribution cabinet are each provided with ten groups of heat dissipation slots; the characteristics are: It also includes a flame sensor, a controller, a pull rod, a motor, a mobile frame, a shunt pipe, an observation window and clamping bolts; the lower side of the controller is connected to the base cabinet by bolts, the upper side of the base cabinet is welded with two groups of threaded columns, the outer sides of the threaded columns are screwed with fixing nuts, the controller is connected to the motor by wires, and the controller is connected to the flame sensor by wires; the motor is connected to the top surface of the base cabinet by bolts, a threaded rod is installed on the motor shaft of the motor, the top of the threaded rod is rotatably connected to a partition, the lower side of the partition is welded with a column, the bottom end of the column is welded with a distribution cabinet, and the bottom surface of the distribution cabinet is connected to an electrical equipment mounting frame by bolts; the left and right sides of the mobile frame are welded with a closing plate, A rack is welded to the lower side of the closing plate on the right, and an opening valve block is meshedly connected to the rear side of the rack, and the opening valve block is rotatably connected to the bottom cabinet; the left and right ends of the pull rod are welded to a placement rack, and the upper side of the placement rack is connected to an upper clamping ring by a clamping bolt; the cabinet door is bonded to the outer side of the observation window; the diverter pipe is an I-shaped structure, and an air inlet is provided at the rear end of the center position of the I-shaped structure of the diverter pipe, and an air supply pipe is screwed to the air inlet of the diverter pipe, and a hose is installed at the bottom end of the air supply pipe, and the other end of the hose is installed at the air outlet of a hand-wheel type carbon dioxide fire extinguisher, and air outlets are provided at the four corners of the I-shaped diverter pipe, and a connecting pipe is installed at the bottom end of each group of air outlets of the diverter pipe, and a universal bamboo joint pipe is screwed to the bottom end of the connecting pipe, and a spray gun is screwed to the bottom end of the universal bamboo joint pipe.
2. A power distribution cabinet with a fireproof structure as claimed in claim 1, characterized in that: An external tooth structure is provided on the outer side surface of the valve opening block, and the external tooth structure of the valve opening block is meshed and connected to the rear tooth surface of the rack. A cylindrical boss is provided on the left side of the valve opening block, and a U-shaped opening groove is provided on the outer side surface of the boss. The rotating handle of the handwheel type carbon dioxide fire extinguisher is embedded in the U-shaped groove of the boss of the valve opening block.
3. A power distribution cabinet with a fireproof structure as claimed in claim 1, characterized in that: A threaded through hole is provided at the center of the movable frame, the outer side of the threaded rod is threadedly engaged in the threaded through hole of the movable frame, two groups of through holes are symmetrically provided on the left and right ends of the threaded through hole of the movable frame, and the column is inserted into the through hole of the movable frame.
4. A power distribution cabinet with a fireproof structure as claimed in claim 1, characterized in that: Two groups of vertical plates are provided on the upper side of the placement rack, and an arc-shaped groove is provided on the top of each group of vertical plates. Rubber pads are bonded to the inner sides of the arc-shaped grooves. The handwheel type carbon dioxide fire extinguisher bottle is placed in the arc-shaped grooves of the vertical plates of the placement rack. Ear plates are provided on the front and rear sides of the vertical plates, and each group of ear plates is provided with threaded through holes that pass through from top to bottom. Fixing bolts are screwed into the threaded through holes of the ear plates of the placement rack, and two groups of long through grooves are provided on the lower side of the placement rack, and the two groups of threaded columns are respectively inserted in the long through grooves of the placement rack.
5. A power distribution cabinet with a fireproof structure as claimed in claim 1, characterized in that: There are two groups of upper clamping rings, and ear plates are provided at the front and rear ends of each group of upper clamping rings. Through holes are provided on the upper side surfaces of the ear plates. The ear plate through holes of the upper clamping rings are opposite to the ear plate threaded through holes of the placement frame plate, and the clamping bolts are inserted into the ear plate through holes of the upper clamping rings.
6. A power distribution cabinet with a fireproof structure as claimed in claim 1, characterized in that: The front side of the cabinet door is provided with a rectangular through groove, an observation window is bonded inside the rectangular through groove, the observation window is made of calcium borosilicate glass, and the rear side of the cabinet door is connected with a flame sensor through bolts.