Power electrical cabinet

Abstract

The invention discloses a power electrical cabinet, and relates to the technical field of electrical cabinets, the power electrical cabinet comprises a cabinet body, a plugging mechanism and a fire extinguishing mechanism, the two sides of the cabinet body are symmetrically provided with heat dissipation holes, the plugging mechanism is arranged in the cabinet body and seals the heat dissipation holes in the two sides of the cabinet body through sealing plates on the plugging mechanism when a fire occurs in the cabinet body, and the fire extinguishing mechanism is arranged in the cabinet body. And the fire extinguishing mechanism is opened under the action of the plugging mechanism to extinguish a fire source in the cabinet body. Sodium bicarbonate powder is placed in the inner cavity of the fixed cylinder of the plugging mechanism, and the principle that the sodium bicarbonate powder is heated and decomposed at high temperature of a fire disaster to generate carbon dioxide is utilized; the lifting plate moves to cut off a thread rope through a thread cutter on the lifting plate, the sealing plate descends to seal heat dissipation holes in the cabinet body, meanwhile, a valve of the fire extinguisher is opened through gear transmission, dry powder in the fire extinguisher is sprayed to a fire source to extinguish the fire, and the influence that a sealing mechanism and a fire extinguishing mechanism cannot be automatically started due to circuit breaking caused by a fire disaster is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical cabinets, and particularly relates to a power electrical cabinet. Background Art

[0002] A power electrical cabinet (referred to as "electrical cabinet" for short) is a key device in the power system for centralized control, distribution, and protection of power equipment, and is widely used in the fields of power distribution, industrial automation, and new energy. When designing the electrical cabinet, in order to dissipate heat from the power equipment inside it, heat dissipation holes are provided on its cabinet body. However, when the power equipment inside the cabinet ages, is short-circuited, overloaded, or has poor contact, etc., these may all cause fires. When external air continuously enters the cabinet through the heat dissipation holes, the oxygen helps the combustion and causes the fire to spread rapidly. Although existing electrical cabinets are equipped with fire extinguishing devices, the valve start-up circuit on the fire extinguishing device may be damaged, resulting in the failure of the fire extinguishing device to start, and thus the power cabinet cannot be extinguished. Summary of the Invention

[0003] The purpose of the present invention is to provide a power electrical cabinet to overcome the above-mentioned defects in the prior art.

[0004] A power electrical cabinet includes a cabinet body, a blocking mechanism, and a fire extinguishing mechanism. Heat dissipation holes are symmetrically provided on both sides of the cabinet body;

[0005] The blocking mechanism is arranged in the cabinet body and closes the heat dissipation holes on both sides of the cabinet body through a sealing plate on it when a fire occurs in the cabinet body;

[0006] The fire extinguishing mechanism is opened under the action of the blocking mechanism to extinguish the fire source in the cabinet body.

[0007] Preferably, the blocking mechanism further includes a fixed cylinder, a guide wheel, and a wire rope. The fixed cylinder is arranged on a bracket in the cabinet body. Sodium bicarbonate powder is provided in the inner cavity of the fixed cylinder. A lifting plate is slidably inserted into the inner cavity of the fixed cylinder. A blocking plate is provided at the lower end of the lifting plate. A limiting groove is provided at the upper end of the lifting plate. A wire cutting knife is provided at the bottom of the limiting groove. The sealing plate is slidably connected in a guiding groove in a guiding plate on the side of the heat dissipation hole. The cabinet body is rotatably connected with a guide wheel through a connecting rod above each sealing plate. The wire rope is located in the limiting groove of the lifting plate and its two ends are respectively wound around the guide wheels and connected to the tops of the two sealing plates.

[0008] Preferably, the fire extinguishing mechanism includes a fire extinguisher, a valve, and a rack. The fire extinguisher is arranged on the top of the cabinet body and its spraying port is connected with a spray pipe extending into the cabinet body. The valve is installed on the spray pipe and a gear is installed on its valve rod. An L-shaped plate is provided on the side of the lifting plate. The rack is arranged on the side of the L-shaped plate and meshes with the gear.

[0009] Preferably, the bracket includes a fixing ring and a support plate. The fixing ring is arranged on the fixing cylinder, and the support plate is connected between the inner wall of the cabinet body and the fixing ring.

[0010] Preferably, the lifting plate is of a cuboid structure.

[0011] Preferably, the upper and lower ends of the guiding groove of the guiding plate are of a closed structure.

[0012] The beneficial effects achieved by the present invention are as follows:

[0013] In this application, sodium bicarbonate powder is placed in the inner cavity of the fixing cylinder of the plugging mechanism. By using the principle that sodium bicarbonate powder decomposes under high temperature in case of fire to generate carbon dioxide, the lifting plate moves to cut the wire rope through the wire cutting knife thereon, the sealing plate descends to plug the heat dissipation holes on the cabinet body, and at the same time, the valve of the fire extinguisher is opened by using gear transmission, and the dry powder in the fire extinguisher is sprayed towards the fire source for extinguishing, avoiding the influence that the circuit is broken in case of fire and the closing mechanism and the extinguishing mechanism cannot be automatically started. Description of the Drawings

[0014] Figure 1 It is the front view of the whole of the present invention.

[0015] Figure 2 It is the side view of the present invention.

[0016] Figure 3 It is the structural schematic diagram of the interior of the present invention.

[0017] Figure 4 It is the front view of the plugging mechanism and the extinguishing mechanism of the present invention.

[0018] Figure 5 It is the top view of the plugging mechanism and the extinguishing mechanism of the present invention.

[0019] Figure 6 It is Figure 5 The partial enlarged view at A in

[0020] Figure 7 It is the structural schematic diagram of the lifting plate, the L-shaped plate and the rack of the present invention.

[0021] In the figure, 1. Cabinet body; 11. Heat dissipation holes; 2. Plugging mechanism; 21. Sealing plate; 23. Fixing cylinder; 24. Bracket; 241. Fixing ring; 242. Support plate; 25. Lifting plate; 251. Limiting groove; 252. Stopping disc; 26. Wire cutting knife; 27. Guiding plate; 28. Guide wheel; 281. Connecting rod; 29. Wire rope; 3. Extinguishing mechanism; 31. Fire extinguisher; 32. Spray pipe; 33. Valve; 34. Gear; 35. L-shaped plate; 36. Rack. Detailed Embodiments

[0022] The following will further describe the specific embodiments of the present invention in detail with reference to the accompanying drawings through the description of the embodiments, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention.

[0023] As Figure 1-7 shown, the present invention provides an electric and electrical cabinet, which is characterized in that it includes a cabinet body 1, a plugging mechanism 2 and a fire extinguishing mechanism 3. Heat dissipation holes 11 are symmetrically arranged on both sides of the cabinet body 1;

[0024] In addition, the plugging mechanism 2 is arranged in the cabinet body 1 and closes the heat dissipation holes 11 on both sides of the cabinet body 1 through the sealing plate 21 thereon when a fire occurs in the cabinet body 1. The plugging mechanism 2 further includes a fixed cylinder 23, a guide wheel 28 and a wire rope 29. The fixed cylinder 23 is arranged on a bracket 24 in the cabinet body 1. The bracket 24 includes a fixed ring 241 and a support plate 242. The fixed ring 241 is arranged on the fixed cylinder 23, and the support plate 242 is connected between the inner wall of the cabinet body 1 and the fixed ring 241;

[0025] Sodium bicarbonate powder is arranged in the inner cavity of the fixed cylinder 23. A lifting plate 25 is slidably inserted into the inner cavity of the fixed cylinder 23. The lifting plate 25 is of a cuboid structure to prevent the lifting plate 25 from rotating randomly in the fixed cylinder 23;

[0026] A retaining disc 252 is arranged at the lower end of the lifting plate 25. A limiting groove 251 is arranged at the upper end of the lifting plate 25. A wire cutting knife 26 is arranged at the bottom of the limiting groove 251. The sealing plate 21 is slidably connected in a guiding groove in a guiding plate 27 on the side of the heat dissipation hole 11. The upper and lower ends of the guiding groove of the guiding plate 27 are of a closed structure to limit the movement of the sealing plate 21;

[0027] A guide wheel 28 is rotatably connected to the cabinet body 1 above each sealing plate 21 through a connecting rod 281. The wire rope 29 is located in the limiting groove 251 of the lifting plate 25 and its two ends are respectively wound around the guide wheel 28 and connected to the tops of the two sealing plates 21;

[0028] In addition, the fire extinguishing mechanism 3 is opened under the action of the plugging mechanism 2 to extinguish the fire source in the cabinet body 1. The fire extinguishing mechanism 3 includes a fire extinguisher 31, a valve 33 and a rack 36. The fire extinguisher 31 is arranged on the top of the cabinet body 1 and its jet port is connected with a spray pipe 32 extending into the cabinet body 1. The valve 33 is installed on the spray pipe 32 and a gear 34 is installed on its valve rod. An L-shaped plate 35 is arranged on the side of the lifting plate 25, and the rack 36 is arranged on the side of the L-shaped plate 35 and meshes with the gear 34.

[0029] Specific embodiments and principles:

[0030] During operation, when a fire breaks out in the electrical equipment within the cabinet body 1, the temperature inside the cabinet body 1 rises, causing the sodium bicarbonate powder in the inner cavity of the fixed cylinder 23 to decompose and generate carbon dioxide. Under the action of the carbon dioxide pressure, the lifting plate 25 is driven to move upward. The wire cutter 26 in the limiting groove 251 of the lifting plate 25 cuts the wire rope 29. Under the action of the gravity of the sealing plate 21, the sealing plate 21 moves downward along the guiding groove on the guiding plate 27, so that the sealing plate 21 blocks the heat dissipation holes 11 on the side of the cabinet body 1, preventing external air from entering the cabinet body 1 to assist combustion;

[0031] During the upward movement of the lifting plate 25, the rack 36 on the side of the L-shaped plate 35 drives the gear 34 on the valve stem of the valve 33 to rotate, opening the valve 33. The dry powder in the fire extinguisher 31 is sprayed onto the fire source through the spray pipe 32 to extinguish the fire source, thus avoiding the impact of a fire causing the circuit to break and the inability to automatically start the closing mechanism and the fire extinguishing mechanism 3.

[0032] The embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A power electrical cabinet, characterized in that: It comprises a cabinet body (1), a blocking mechanism (2) and a fire extinguishing mechanism (3), wherein heat dissipation holes (11) are symmetrically arranged on both sides of the cabinet body (1); The blocking mechanism (2) is arranged in the cabinet (1) and, when a fire occurs in the cabinet (1), blocks the heat dissipation holes (11) on both sides of the cabinet (1) through the sealing plates (21) thereon; The fire extinguishing mechanism (3) is opened under the action of the blocking mechanism (2) to extinguish the fire source in the cabinet (1).

2. The power electrical cabinet according to claim 1, characterized in that: The blocking mechanism (2) further comprises a fixed cylinder (23), a guide wheel (28) and a wire rope (29); the fixed cylinder (23) is arranged on a bracket (24) in the cabinet (1); sodium bicarbonate powder is arranged in the inner cavity of the fixed cylinder (23); a lifting plate (25) is slidably inserted in the inner cavity of the fixed cylinder (23); a stopper (252) is arranged at the lower end of the lifting plate (25); a limit groove (251) is arranged at the upper end of the lifting plate (25); and the limit groove (251) is arranged at the upper end of the lifting plate (25). A wire cutter (26) is provided at the bottom of the positioning groove (251); the sealing plate (21) is slidably connected to a guide groove in a guide plate (27) on the side of the heat dissipation hole (11); the cabinet (1) is rotatably connected to a guide wheel (28) above each sealing plate (21) via a connecting rod (281); the wire rope (29) is located in the limiting groove (251) of the lifting plate (25) and its two ends respectively bypass the guide wheel (28) and are connected to the tops of the two sealing plates (21).

3. The electric power cabinet according to claim 2, characterized in that: The fire extinguishing mechanism (3) comprises a fire extinguisher (31), a valve (33) and a rack (36); the fire extinguisher (31) is arranged on the top of the cabinet (1) and its spray port is connected to a nozzle (32) extending into the cabinet (1); the valve (33) is installed on the nozzle (32) and a gear (34) is installed on its valve stem; an L-shaped plate (35) is provided on the side of the lifting plate (25); and the rack (36) is arranged on the side of the L-shaped plate (35) and meshes with the gear (34).

4. The electric power cabinet according to claim 2, characterized in that: The bracket (24) comprises a fixing ring (241) and a support plate (242); the fixing ring (241) is arranged on the fixing tube (23); and the support plate (242) is connected between the inner wall of the cabinet (1) and the fixing ring (241).

5. The electric power cabinet according to claim 2, characterized in that: The lifting plate (25) is a rectangular parallelepiped structure.

6. The power electrical cabinet according to claim 2, characterized in that: The upper and lower ends of the guide groove of the guide plate (27) are closed structures.

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