Fireproof electrical cabinet

Abstract

The utility model discloses a kind of fireproof electrical cabinet, it is related to electrical equipment technical field, including the opening being equipped on the cabinet body side wall, the cabinet door one side rotation is installed on the opening edge, the cabinet body side wall is opened with air inlet and air outlet, the exhaust fan is installed on air outlet, the air inlet fan is installed on air inlet, the air inlet fan and exhaust fan are on symmetrical position, the temperature sensor is installed in cabinet body, for detecting cabinet body internal temperature, the smoke alarm is installed in cabinet body and close to exhaust fan, the closure device is installed in cabinet body, the closure device is electrically connected with smoke alarm and temperature sensor, when temperature sensor and smoke alarm are triggered, the closure device closes air inlet and air outlet. Overcome the defect that existing electrical cabinet cannot carry out fast fire extinguishing inside while preventing flame from spreading outward when accidentally catching fire.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and specifically relates to a fireproof electrical cabinet. Background Technology

[0002] Electrical cabinets, commonly known as distribution cabinets, are used for power distribution and protection. Because electrical cabinets contain many electronic components, they are prone to generating high-temperature electrical sparks in the event of an accidental short circuit or overload. Since many of the electronic components inside are flammable, an accidental fire in an electrical cabinet can easily destroy the cabinet, or even cause the fire to spread, endangering circuit safety or damaging nearby public property.

[0003] Therefore, a fireproof electrical cabinet is needed that can quickly extinguish the fire inside the cabinet in the event of an accidental fire, while preventing the fire from spreading outwards. Utility Model Content

[0004] The purpose of this utility model is to provide a fireproof electrical cabinet that uses a sealing plate to enclose the cabinet, isolating it from air, and allows carbon dioxide to be released into the cabinet. This overcomes the shortcomings of existing electrical cabinets that cannot quickly extinguish internal fires and prevent the spread of flames when an accidental fire occurs. The specific technical solution is as follows:

[0005] A fireproof electrical cabinet includes a cabinet body, a cabinet door, an exhaust fan, an intake fan, a temperature sensor, a smoke detector, and a sealing device. The cabinet body has an opening on its side wall, and the cabinet door is rotatably mounted on the edge of the opening. The cabinet body side wall has an air inlet and an exhaust outlet. The exhaust fan is mounted on the exhaust outlet, and the intake fan is mounted on the air inlet, with the intake and exhaust fans positioned symmetrically. The temperature sensor is installed inside the cabinet to detect the internal temperature. The smoke detector is installed inside the cabinet near the exhaust fan. The sealing device is installed inside the cabinet and electrically connected to the smoke detector and temperature sensor. When the temperature sensor and smoke detector are triggered, the sealing device closes the air inlet and exhaust outlet.

[0006] Preferably, the sealing device includes a partition, a rotating shaft, a first baffle, a second baffle, a first traction rope, a first take-up reel, a second take-up reel, and a limiting unit. The partition is installed inside the cabinet, and the partition and the cabinet form a first cavity, a second cavity, and a third cavity. The partition is provided with vent holes corresponding to the air inlet and exhaust holes. The two ends of the rotating shaft are rotatably connected to the cabinet and the partition, respectively, and the rotating shaft is located inside the third cavity. The first take-up reel and the second take-up reel are fixedly installed on the rotating shaft. One end of the first traction rope is wound around the first take-up reel, and the other end is connected to the first baffle, which is located inside the first cavity. One end of the second traction rope is wound around the second take-up reel, and the other end is connected to the second baffle, which is located inside the second cavity. The limiting unit is installed on the side walls of the first cavity and the second cavity, respectively, for limiting the first baffle and the second baffle.

[0007] Preferably, the limiting unit includes a limiting block, an electromagnet, a spring, and a mounting box. The mounting box is mounted on the partition, the limiting block is slidably mounted inside the mounting box, the spring is mounted inside the mounting box, and both ends of the spring are connected to the limiting block and the inner sidewall of the mounting box, respectively. A slot corresponding to the limiting block is provided on the inner sidewall of the cabinet, and the electromagnet is mounted in the slot. The limiting block is made of a magnetically attractable material. When the temperature sensor and the smoke alarm are triggered, the electromagnet stops starting.

[0008] Preferably, rubber pads are installed at the bottom of the first cavity and the bottom of the second cavity.

[0009] Preferably, the end of the rotating shaft that is connected to the cabinet extends outside the cabinet, and a connecting groove is provided at the end of the rotating shaft located outside the cabinet.

[0010] Preferably, a gas storage tank is installed in the third cavity, the gas storage tank stores high-pressure carbon dioxide, an exhaust pipe is installed on the gas storage tank, the exhaust pipe extends through the partition into the cabinet, and a solenoid valve is installed on the exhaust pipe, the solenoid valve is electrically connected to a temperature sensor and a smoke alarm.

[0011] Preferably, a bracket is installed on the side of the partition away from the third cavity, and a fan blade is rotatably mounted on the bracket, with the center of the fan blade and the end of the exhaust pipe on the same vertical line.

[0012] Preferably, a pressure relief hole is provided on the side wall of the cabinet, and a manual pressure relief valve is installed on the pressure relief hole.

[0013] Preferably, an observation window is provided on the side wall of the cabinet.

[0014] Preferably, the inner side wall of the cabinet, the first baffle, and the second baffle are all covered with a fire-retardant coating.

[0015] Compared with existing technologies, this utility model has the following beneficial effects:

[0016] 1. When a fire breaks out inside the cabinet, if the temperature sensor or smoke alarm detects that the temperature inside the cabinet exceeds the set value or smoke appears, the temperature sensor or smoke alarm will control the electrical cabinet to disconnect the power supply and also disconnect the power supply to the limit unit to prevent further deterioration. Simultaneously, because the limit unit cannot support the first and second baffles after being de-energized, the first and second baffles will descend to seal the air inlet and outlet, reducing air exchange between the cabinet and the outside, cutting off the oxygen supply inside the cabinet, and extinguishing the fire through oxygen deprivation. Furthermore, because the cabinet is enclosed, if fire cannot be extinguished, its spread can be controlled within the cabinet.

[0017] 2. When the temperature sensor or smoke detector detects that the temperature inside the cabinet exceeds the set value or smoke appears, the solenoid valve will open, and carbon dioxide from the gas tank will be injected into the cabinet under pressure. When the carbon dioxide is sprayed onto the burning object, it will quickly displace oxygen from the air, reducing the oxygen concentration around the combustible material. Because carbon dioxide is denser than air, it will accumulate on the surface of the combustible material, forming a "carbon dioxide blanket," thereby isolating oxygen and extinguishing the flame due to lack of oxygen. This further accelerates the fire extinguishing process and reduces damage inside the electrical cabinet. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is the front sectional view of this utility model.

[0021] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle.

[0022] Figure 4 yes Figure 2 Enlarged view of section B in the middle.

[0023] Figure 5 This is a top view of the third cavity of this utility model.

[0024] Explanation of key figure labels:

[0025] 1. Cabinet body; 2. Cabinet door; 3. Exhaust fan; 4. Intake fan; 51. Partition; 52. Shaft; 53. First baffle; 54. Second baffle; 55. First traction rope; 56. Second traction rope; 57. First take-up reel; 58. Second take-up reel; 61. First cavity; 62. Second cavity; 63. Third cavity; 7. Limiting unit; 71. Limiting block; 72. Electromagnet; 73. Spring; 74. Mounting box; 8. Air tank; 9. Exhaust pipe; 10. Solenoid valve; 11. Bracket; 12. Fan blade. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Next, refer to Figures 1 to 5 The working principle of this embodiment will be described in detail so that those skilled in the art can better understand this utility model:

[0028] A fireproof electrical cabinet has an opening on the side wall of the cabinet body 1, and a cabinet door 2 is hinged to one side of the opening edge. Air inlets and outlets are provided on the side wall of the cabinet body 1. An exhaust fan 3 is bolted to the outlet, and an intake fan 4 is bolted to the air inlet. An intake fan 4 is symmetrically positioned with the exhaust fan 3, allowing for air exchange with the outside environment to cool the components inside the cabinet body 1. A temperature sensor is installed inside the cabinet body 1 to detect the internal temperature. A smoke detector is installed inside the cabinet body 1 near the exhaust fan 3. Since most of the air inside the cabinet body 1 exits through this location, smoke is more easily drawn there, making the smoke detector's detection more accurate and rapid. A sealing device is installed inside the cabinet body 1 and is electrically connected to the smoke detector and temperature sensor. When the temperature sensor and smoke detector are triggered, the sealing device closes the air inlets and outlets, reducing air exchange between the cabinet body 1 and the outside environment, cutting off the oxygen supply inside the cabinet body 1, and extinguishing the fire by creating an oxygen-deficient environment. Furthermore, since cabinet 1 is enclosed, if fire cannot be extinguished, the fire can be contained within cabinet 1 to prevent it from spreading.

[0029] The partition 51 is bolted to the cabinet 1, forming a first cavity 61, a second cavity 62, and a third cavity 63 with the cabinet 1. The partition 51 has ventilation holes corresponding to the air inlet and outlet. The two ends of the rotating shaft 52 are rotatably connected to the cabinet 1 and the partition 51 respectively via bearings, and the rotating shaft 52 is located within the third cavity 63. A first take-up reel 57 and a second take-up reel 58 are fixedly mounted on the rotating shaft 52. One end of a first traction rope 55 is wound around the first take-up reel 57, and the other end is connected to a first baffle 53, which is located within the first cavity 61. One end of a second traction rope 56 is wound around the second take-up reel 58, and the other end is connected to a second baffle 54, which is located within the second cavity 62. The first take-up reel 57 and the second take-up reel 58 rotate in the same direction when releasing the line; therefore, the first baffle 53 and the second baffle 54 can interact to promote line release, allowing the first baffle 53 and the second baffle 54 to fall quickly. Rubber pads are installed at the bottom of the first cavity 61 and the bottom of the second cavity 62 to absorb the impact force when the first baffle 53 and the second baffle 54 descend to the bottom, to prevent damage to the partition 51, and to increase the sealing performance of the first baffle 53 and the second baffle 54.

[0030] One end of the rotating shaft 52 connected to the cabinet 1 extends outside the cabinet 1. The end of the rotating shaft 52 located outside the cabinet 1 has a connecting groove. Maintenance personnel can insert a tool into the connecting groove and rotate the rotating shaft 52 in the opposite direction, so that the first take-up wheel 57 and the second take-up wheel 58 can wind up the first traction rope 55 and the second traction rope 56, and prevent the first baffle 53 and the second baffle 54 from returning to their initial positions, so that they can be reused.

[0031] The mounting box 74 is mounted on the partition 51. The limiting block 71 is slidably mounted inside the mounting box 74. The spring 73 is mounted inside the mounting box 74, with its two ends connected to the limiting block 71 and the inner wall of the mounting box 74, respectively. The spring 73 is a tension spring. A slot corresponding to the limiting block 71 is provided on the inner wall of the cabinet 1. An electromagnet 72 is mounted in the slot. The limiting block 71 is made of a magnetically attractive material. Under normal conditions, the electromagnet 72 is activated, using magnetic force to fix the limiting block 71 in the slot, preventing the first baffle 53 or the second baffle 54 from moving downwards. At this time, the spring 73 is in a stretched state. When the temperature sensor and smoke alarm are triggered, the electromagnet 72 stops, and the limiting block 71, under the action of the spring 73, fully enters the mounting box 74. The first baffle 53 or the second baffle 54 slides down to the bottom of the partition 51.

[0032] In another embodiment, an electric push rod can be used to move the first baffle 53 and the second baffle 54. When the temperature sensor and smoke alarm are triggered, the electric push rod extends, causing the first baffle 53 and the second baffle 54 to seal the air inlet and outlet. Compared to the method using the limit block 71 in conjunction with the traction rope, this method makes it easier to return to the initial state. However, when a fire occurs inside the electrical cabinet, components may burn out, leading to a power outage. Without power, the electric push rod cannot be activated to perform the corresponding operations. The method using the limit block 71 in conjunction with the traction rope can still achieve the set effect even when the power is off.

[0033] The third chamber 63 houses a gas storage tank 8 containing high-pressure carbon dioxide. An exhaust pipe 9 is installed on the gas storage tank 8, extending through the partition 51 into the cabinet 1. A solenoid valve 10 is installed on the exhaust pipe 9, electrically connected to a temperature sensor and a smoke detector. When the temperature sensor or smoke detector detects that the temperature inside the cabinet 1 exceeds a set value or smoke is detected, the solenoid valve 10 opens, and the carbon dioxide in the gas storage tank 8 is injected into the cabinet 1 under pressure. When the carbon dioxide is sprayed onto the burning object, it rapidly displaces oxygen from the air, reducing the oxygen concentration around the combustible material. Because carbon dioxide is denser than air, it accumulates on the surface of the combustible material, forming a "carbon dioxide blanket," thus isolating oxygen and extinguishing the flame due to lack of oxygen. This further accelerates the fire extinguishing process and reduces damage inside the electrical cabinet.

[0034] A bracket 11 is installed on the side of the partition 51 away from the third chamber 63. A fan blade 12 is rotatably mounted on the bracket 11. The center of the fan blade 12 is on the same vertical line as the end of the exhaust pipe 9. The sprayed carbon dioxide gas will hit the fan blade 12 and drive the fan blade 12 to rotate. The fan blade 12 can quickly diffuse the carbon dioxide gas into the cabinet 1, further improving the speed of fire extinguishing.

[0035] A pressure relief hole is provided on the side wall of cabinet 1, and a manual pressure relief valve is installed on the pressure relief hole. After the fire is extinguished, the maintenance personnel can raise the manual pressure relief valve to release the carbon dioxide and other gases in cabinet 1 first, so as to prevent the harmful gases produced by the combustion in cabinet 1 from directly hitting the maintenance personnel when the maintenance personnel open cabinet door 2 for maintenance, which would cause harm to the health of the maintenance personnel.

[0036] An observation window is provided on the side wall of cabinet 1 to facilitate maintenance personnel to observe the situation inside cabinet 1. The inner side wall of cabinet 1, as well as the first baffle 53 and the second baffle 54, are covered with a fire-retardant coating to increase fire resistance, prevent easy damage when exposed to fire, and improve practicality.

[0037] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A fireproof electrical cabinet, characterized in that, The system includes a cabinet (1), a cabinet door (2), an exhaust fan (3), an intake fan (4), a temperature sensor, a smoke alarm, and a sealing device. The cabinet (1) has an opening on its side wall. The cabinet door (2) is rotatably mounted on the edge of the opening. The cabinet (1) has an air inlet and an exhaust outlet on its side wall. The exhaust fan (3) is mounted on the exhaust outlet, and the intake fan (4) is mounted on the air inlet. The intake fan (4) and the exhaust fan (3) are in symmetrical positions. The temperature sensor is installed inside the cabinet (1) to detect the internal temperature of the cabinet (1). The smoke alarm is installed inside the cabinet (1) and near the exhaust fan (3). The sealing device is installed inside the cabinet (1) and is electrically connected to the smoke alarm and the temperature sensor. When the temperature sensor and the smoke alarm are triggered, the sealing device seals the air inlet and the exhaust outlet.

2. A fire resistant electrical cabinet according to claim 1, characterised in that The sealing device includes a partition (51), a rotating shaft (52), a first baffle (53), a second baffle (54), a first traction rope (55), a second traction rope (56), a first take-up reel (57), a second take-up reel (58), and a limiting unit (7). The partition (51) is installed inside the cabinet (1), and the partition (51) and the cabinet (1) form a first cavity (61), a second cavity (62), and a third cavity (63). The partition (51) is provided with ventilation holes corresponding to the air inlet and exhaust holes. The two ends of the rotating shaft (52) are rotatably connected to the cabinet (1) and the partition (51) respectively, and the rotating shaft (52) is located in the third cavity (63). Inside, the first take-up reel (57) and the second take-up reel (58) are fixedly installed on the rotating shaft (52). One end of the first traction rope (55) is wrapped around the first take-up reel (57), and the other end is connected to the first baffle (53). The first baffle (53) is located inside the first cavity (61). One end of the second traction rope (56) is wrapped around the second take-up reel (58), and the other end is connected to the second baffle (54). The second baffle (54) is located inside the second cavity (62). The limiting unit (7) is installed on the side wall of the first cavity (61) and the second cavity (62) respectively, and is used to limit the first baffle (53) and the second baffle (54).

3. A fire resistant electrical cabinet according to claim 2, characterised in that The limiting unit (7) includes a limiting block (71), an electromagnet (72), a spring (73), and a mounting box (74). The mounting box (74) is mounted on the partition (51). The limiting block (71) is slidably mounted inside the mounting box (74). The spring (73) is mounted inside the mounting box (74). The two ends of the spring (73) are respectively connected to the inner sidewalls of the limiting block (71) and the mounting box (74). The inner sidewall of the cabinet (1) is provided with a slot corresponding to the limiting block (71). The electromagnet (72) is mounted in the slot. The limiting block (71) is made of a material that can be magnetically attracted. When the temperature sensor and the smoke alarm are triggered, the electromagnet (72) stops starting.

4. A fire resistant electrical cabinet according to claim 2, wherein Rubber pads are installed at the bottom of the first cavity (61) and the bottom of the second cavity (62).

5. A fireproof electrical cabinet according to claim 2, characterized in that, One end of the rotating shaft (52) connected to the cabinet (1) extends outside the cabinet (1), and a connecting groove is provided at the end of the rotating shaft (52) located outside the cabinet (1).

6. A fireproof electrical cabinet according to claim 2, characterized in that, The third cavity (63) is equipped with a gas storage tank (8) containing high-pressure carbon dioxide. An exhaust pipe (9) is installed on the gas storage tank (8), which extends through the partition (51) into the cabinet (1). A solenoid valve (10) is installed on the exhaust pipe (9), which is electrically connected to a temperature sensor and a smoke alarm.

7. A fireproof electrical cabinet according to claim 6, characterized in that, A bracket (11) is installed on the side of the partition (51) away from the third cavity (63). A fan blade (12) is rotatably mounted on the bracket (11). The center of the fan blade (12) is on the same vertical line as the end of the exhaust pipe (9).

8. A fireproof electrical cabinet according to claim 1, characterized in that, The cabinet (1) has a pressure relief hole on its side wall, and a manual pressure relief valve is installed on the pressure relief hole.

9. A fireproof electrical cabinet according to claim 1, characterized in that, An observation window is provided on the side wall of the cabinet (1).

10. A fireproof electrical cabinet according to claim 1, characterized in that, The inner wall of the cabinet (1), the first baffle (53), and the second baffle (54) are all covered with a fireproof coating.

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