Automatic fire extinguishing device for enclosed electrical equipment cabinet

Abstract

An automatic fire extinguishing device for a closed electrical equipment cabinet, which includes a bottom plate and a cover plate that are installed in cooperation. The bottom plate is installed inside the electrical equipment cabinet, and a fire extinguishing agent and a temperature-sensing detection and activation wire are installed between the bottom plate and the cover plate. When a fire occurs inside the equipment cabinet, the fire extinguishing agent can be decomposed by heat in time to achieve the necessary fire extinguishing effect. In addition, the present invention also has a wide coverage range, can be arranged omnidirectionally and at multiple points around the ignition-prone points, detect and extinguish the fire source in the first time; precise protection, through precise design and accurate arrangement, achieve a fixed-point protection effect; rapid response, integration of detection and extinguishing, after the device detects the fire source, it starts quickly and extinguishes quickly; convenient installation, the installation is not restricted by space, perfectly fits the protection area, and realizes real-time protection. These characteristics of the device fundamentally solve the problem of potential fire safety hazards existing in the closed electrical equipment cabinets in substations.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing equipment, and specifically relates to an automatic fire extinguishing device for a closed electrical device cabinet. Background Art

[0002] Closed electrical device cabinets such as terminal boxes, switch control cabinets, and power distribution cabinets are one of the important equipment in substations, and have the characteristics of a large number of configurations, wide distribution locations, closed spaces, and dense electrical wiring inside the cabinets. These characteristics of the closed electrical device cabinet are extremely likely to cause local fires due to insulation aging, poor contact, overload, short circuit, heating, etc. of the wiring inside the cabinet. Since the device cabinet adopts a stainless steel sealing structure and there is no fire alarm device and fire extinguishing device inside the cabinet, patrol personnel cannot detect the fire in time, and the fire cannot be effectively controlled in the initial stage, resulting in the spread of the fire, and the local fire will spread into a larger-scale fire. At present, there is a lack of effective fire protection facilities inside the closed electrical device cabinet, and the potential fire safety hazards existing in the closed electrical device cabinet will cause serious consequences such as fire spread, equipment damage, and large-scale power outages, seriously threatening the safe and reliable operation of the equipment in the substation. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic fire extinguishing device for a closed electrical device cabinet, which can decompose and spray fire extinguishing microparticles in time when a fire occurs in the electrical device cabinet, achieving a necessary fire extinguishing effect and solving the problems in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: An automatic fire extinguishing device for a closed electrical device cabinet of the present invention includes a bottom plate, and a cover plate is provided on the bottom plate. Both ends of the cover plate in the length direction are detachably fixed on the bottom plate through buckles. An exhaust channel is left between the cover plate and the bottom plate. A fire extinguishing agent and a temperature-sensing detection starting wire are installed in the exhaust channel. The temperature-sensing detection starting wire extends out of the cover plate. A desiccant is installed between the cover plate and the bottom plate. An operation indicator light and a start indicator light are provided on the cover plate. An observation window is also opened on the cover plate above the fire extinguishing agent. Rivet holes are opened at the four corner positions of the bottom plate. An electronic control element is installed between the cover plate and the bottom plate. The electronic control element is connected to the fire extinguishing agent through an electric starting wire and an electric feedback wire. A remote feedback wire and a remote starting wire are also connected to the electronic control element. Both the remote feedback wire and the remote starting wire extend out of the exhaust channel. A double-sided adhesive layer is installed on the rear side of the bottom plate. The fire extinguishing agent is composed of potassium carbonate, sodium bicarbonate, sucrose, starch, carbon powder, melamine polyphosphate, and tartrate. The automatic fire extinguishing device is installed at the top position inside the electrical device cabinet. A snap cover that can be rotated to open and close is provided at the top of the electrical device cabinet. The automatic fire extinguishing device is fixed to the bottom of the snap cover. A rotatable cabinet door is provided on the front end face of the electrical device cabinet. An opening and closing linkage mechanism is installed between the cabinet door and the snap cover. The setting of the opening and closing linkage mechanism enables the snap cover to be opened only after the cabinet door is opened, and the cabinet door can be closed only after the snap cover is closed. The opening and closing linkage mechanism includes a first push rod and an insertion rod provided on the cabinet door. A positioning block and a second push rod are installed at the bottom of the snap cover. A first moving rod and a second moving rod are installed inside the cabinet body of the electrical device cabinet. A first convex edge is provided on the first moving rod. A first spring is installed on the first moving rod on one side of the first convex edge. A positioning hole matching the first moving rod is opened on the positioning block. The first spring always has a tendency to move the first moving rod away from the positioning hole. A first inclined surface matching the first push rod is also provided at the end of the first moving rod. When the cabinet door is closed, the first push rod pushes the first inclined surface to overcome the elastic force of the first spring, enabling the first moving rod to enter the positioning hole to restrict the rotation of the snap cover. A second convex edge is provided on the second moving rod. A second spring is installed on the second moving rod on one side of the second convex edge. A second inclined surface matching the second push rod is provided at one end of the second moving rod. The second inclined surface is arranged perpendicular to the first inclined surface. A jack matching the insertion rod is also provided on the second moving rod. The second spring always has a tendency to push the second moving rod to separate the jack on it from the insertion rod. When the snap cover is closed, the second push rod pushes the second inclined surface to overcome the elastic force of the second spring, enabling the second moving rod and the jack on it to move to a position matching the insertion rod.

[0005] The positive effects of the present invention are as follows: The automatic fire extinguishing device for a closed electrical equipment cabinet of the present invention includes a bottom plate and a cover plate that are cooperatively installed. The bottom plate is installed inside the electrical equipment cabinet, and a fire extinguishing agent and a temperature-sensing detection and start wire are installed between the bottom plate and the cover plate. When a fire occurs inside the equipment cabinet, the fire extinguishing agent can be timely thermally decomposed to achieve the necessary fire extinguishing effect. In addition, the present invention also has a wide coverage range, can be arranged omnidirectionally and at multiple points around the fire-prone points, detect and extinguish the fire source in the first time; precise protection, achieve the fixed-point protection effect through precise design and accurate arrangement; rapid response, integration of detection and fire extinguishing, after the device detects the fire source, it starts quickly and extinguishes quickly; convenient installation, the installation is not restricted by space, perfectly fits the protection area, and realizes real-time protection. These characteristics of the device fundamentally solve the problem of potential fire safety hazards in the closed electrical equipment cabinet in the substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is the three-dimensional structure schematic diagram of the present invention;

[0007] Figure 2 is the front view of the present invention;

[0008] Figure 3 is Figure 2 the rear view of

[0009] Figure 4 is Figure 2 the bottom view of

[0010] Figure 5 is the installation schematic diagram of the present invention inside the electrical equipment cabinet;

[0011] Figure 6 is the structure schematic diagram of the opening and closing linkage mechanism arranged between the buckling cover and the cabinet door;

[0012] Figure 7 is Figure 6 the enlarged view of the A-A cross-sectional view in

[0013] Figure 8 is Figure 7 the state schematic diagram after the cabinet door of the structure in

[0014] Figure 9 is Figure 6 the enlarged view of the B-B cross-sectional view in

[0015] Figure 10 is Figure 9 the state schematic diagram after the buckling cover of the structure in DETAILED DESCRIPTION OF THE INVENTION

[0016] An automatic fire extinguishing device for a closed electrical equipment cabinet of the present invention, as Figure 1 and Figure 2As shown in the figure, it includes a bottom plate 5, and a cover plate 2 is provided on the bottom plate 5. Both ends of the cover plate 2 in the length direction are detachably fixed on the bottom plate 5 through buckles 4, and can be disassembled and assembled according to needs. There is an exhaust passage 15 between the cover plate 2 and the bottom plate 5.

[0017] In the exhaust passage 15, a fire extinguishing agent 10 and a temperature-sensing detection starting wire 1 are installed. The temperature-sensing detection starting wire 1 extends out of the cover plate 2. A desiccant 13 is installed between the cover plate 2 and the bottom plate 5. An operation indicator light 8 and a start indicator light 9 are provided on the cover plate 2. An observation window 12 is also opened on the cover plate 2 above the fire extinguishing agent 10. Rivet holes 3 are opened at the four corner positions of the bottom plate 5.

[0018] When the power is turned on, the device operates normally and the operation indicator light 8 is on; the start indicator light 9 is provided on the cover plate substrate 2. When the fire extinguishing agent 10 starts to undergo a thermal decomposition reaction, the electronic control component receives a feedback signal and the start indicator light 9 is on.

[0019] The temperature-sensing detection starting wire 1 detects the rapidly rising temperature in the enclosed electrical equipment cabinet due to a fire, and transfers the high temperature to the fire extinguishing agent 10 composed of temperature-sensing materials. The fire extinguishing agent 10 undergoes a decomposition reaction when heated, generating a large amount of nitrogen, carbon dioxide and a series of sub-nanometer fire extinguishing microparticles, thereby extinguishing the fire in the enclosed electrical equipment cabinet.

[0020] Furthermore, to achieve remote operation control and feedback of the fire extinguishing device, an electronic control component 11 is installed between the cover plate 2 and the bottom plate 5. The electronic control component 11 is connected to the fire extinguishing agent 10 through an electric start wire 16 and an electric feedback wire 17. A remote feedback wire 6 and a remote start wire 7 are also connected to the electronic control component 11. Both the remote feedback wire 6 and the remote start wire 7 extend out of the exhaust passage 15.

[0021] The remote start wire 7 is connected to the electronic control component 11, and the fire extinguishing agent 10 can be started to undergo a decomposition reaction to achieve fire extinguishing through remote control. The remote feedback wire 6 is connected to the remote background. When a fire occurs in the enclosed electrical equipment cabinet, the temperature-sensing detection starting wire 1 senses the high temperature and sends an alarm signal to the background through the remote feedback wire 6.

[0022] When remotely controlling the device, the remote control signal is transmitted down to the electronic control component 11 through the remote start wire 7, and then the fire extinguishing agent 10 is heated to undergo a decomposition reaction through the electric start wire 16 to start the fire extinguishing; the remote feedback wire 6 is connected to the electronic control component 11. When starting the fire extinguishing, the fire extinguishing agent 10 sends a device start signal to the electronic control component 11 through the electric feedback wire 17, and the signal is then transmitted to the remote monitoring background through the remote feedback wire 6.

[0023] Preferably, the fire extinguishing agent 10 can be automatically started to decompose by detecting the high temperature of the fire through the temperature-sensitive detection start line 1, or can be remotely controlled and started through the remote start line 7. The combination of the two start modes ensures the reliability of the device start.

[0024] The automatic fire extinguishing device for the enclosed electrical device cabinet realizes the integration of automatic start and remote start, which not only ensures the reliability of the device start, but also guarantees the personal safety of the fire-fighting personnel; it realizes the integration of the warning function and the fire extinguishing function, which can not only eliminate the monitoring blind spots of the fire hazards in the enclosed electrical device cabinet, but also extinguish the fire in time at the initial stage of the fire. The present invention will effectively solve the fire safety hazards caused by the easy occurrence of fires and difficult monitoring in the enclosed electrical device cabinet, and ensure the safe and stable operation of the equipment in the substation.

[0025] Furthermore, as Figure 3 shown, a double-sided adhesive layer 14 is installed on the rear side of the bottom plate 5. The device can be fixed at a suitable position in the enclosed electrical device cabinet by installing rivets in the rivet holes 3 or by using the double-sided adhesive layer 14.

[0026] As Figure 4 shown, the cover plate 2 adopts a square arch structure, and there is a certain space between it and the bottom plate 5 for placing the fire extinguishing agent 10, electronic control components 11, desiccant 13, electric start line 16, and electric feedback line 17; the exhaust channels 15 are arranged on the front and rear sides of the connection between the cover plate substrate 2 and the bottom plate 5 for releasing the gas generated when the fire extinguishing agent 10 decomposes by heat; the observation window 12 is arranged on the cover plate substrate 2 for power workers to inspect the working state of the fire extinguishing agent 10; the desiccant 13 is used to absorb the moisture in the air and keep the fire extinguishing agent 10 dry.

[0027] Furthermore, the fire extinguishing agent 10 can be composed of substances such as potassium carbonate, sodium bicarbonate, sucrose, starch, carbon powder, melamine polyphosphate, and tartrate. The nitrogen, carbon dioxide and other fire extinguishing substances generated after decomposition by heat are non-toxic, and will not cause secondary damage to the electrical equipment in the cabinet during the fire extinguishing process.

[0028] Preferably, the signal transmitted by the remote feedback line 6 to the monitoring background can real-time feedback the operation state of the device, eliminating the equipment monitoring blind spots in the enclosed electrical device cabinet, and power workers can remotely master the fire safety state of the enclosed electrical device cabinet. Preferably, the automatic fire extinguishing device for the enclosed electrical device cabinet realizes the integration of detection and fire extinguishing. The device can automatically and quickly start to extinguish the fire when detecting a fire, extinguish the fire at the initial stage, and send an alarm signal to the remote monitoring background, fundamentally solving the problem of fire safety hazards existing in the enclosed electrical device cabinet in the substation.

[0029] To ensure the fire extinguishing effect of the fire extinguishing device inside the electrical device cabinet, the automatic fire extinguishing device is installed at the top position inside the electrical device cabinet. However, when it is located at the top position inside the cabinet, it will block the touch unit at the upper part of the cabinet, affecting subsequent control switch operations. To avoid the above situation, as Figure 5 shown, a cover 18 that can be rotated to open and close is provided at the top of the electrical device cabinet. The automatic fire extinguishing device is fixed to the bottom of the cover 18, and a cabinet door 19 that can be rotated is provided on the front end face of the electrical device cabinet.

[0030] If, after opening the cabinet door 19, it is found that the automatic fire extinguishing device blocks the touch unit switch, then the cover 18 with the automatic fire extinguishing device needs to be turned upwards. After the operation is completed, before closing the cabinet door 19, the cover 18 with the automatic fire extinguishing device needs to be rotated back to its original position to ensure the automatic fire extinguishing function of the device. At the same time, to prevent non-staff from rotating the cover 18, the cover 18 can only be flipped after the staff opens the cabinet door 19.

[0031] To achieve the above functions, an opening and closing linkage mechanism is installed between the cabinet door 19 and the cover 18. The setting of the opening and closing linkage mechanism enables the cover 18 to be opened only after the cabinet door 19 is opened, and the cabinet door 19 can be closed only after the cover 18 is closed.

[0032] As Figure 6 、 Figure 7 and Figure 9 shown, the opening and closing linkage mechanism includes a first push rod 20 and a plug rod 21 provided on the cabinet door 19, a positioning block 22 and a second push rod 23 are installed at the bottom of the cover 18, and a first moving rod 24 and a second moving rod 33 are installed inside the cabinet body of the electrical device cabinet.

[0033] A first convex edge 25 is provided on the first moving rod 24. A first spring 26 is installed on the first moving rod 24 on one side of the first convex edge 25. A positioning hole 27 that matches the first moving rod 24 is opened on the positioning block 22. When the first moving rod 24 is located inside the positioning hole 27, the cover 18 is closed and locked on the cabinet body. The first spring 26 always has a tendency to move the first moving rod 24 away from the positioning hole 27. A first inclined surface 28 that matches the first push rod 20 is also provided at the end of the first moving rod 24. When the cabinet door 19 is closed, the first push rod 20 pushes the first inclined surface 28 to overcome the elastic force of the first spring 26, allowing the first moving rod 24 to enter the positioning hole 27 to restrict the rotation of the cover 18.

[0034] A second convex edge 29 is provided on the second moving rod 33. A second spring 30 is mounted on the second moving rod 33 on one side of the second convex edge 29. At one end of the second moving rod 33, there is a second inclined surface 31 that cooperates with the second push rod 23, and the second inclined surface 31 is arranged perpendicular to the first inclined surface 28. A jack 32 that cooperates with the insertion rod 21 is also provided on the second moving rod 33. The second spring 30 always has a tendency to push the second moving rod 33 to separate the jack 32 thereon from the insertion rod 21. When the cover 18 is closed, the second push rod 23 pushes the second inclined surface 31 to overcome the elastic force of the second spring 30, causing the second moving rod 33 and the jack 32 thereon to move to a position where they cooperate with the insertion rod 21.

[0035] The following demonstrates the actions of the opening and closing linkage mechanism for different situations in combination with the actual operation:

[0036] 1. Only after the cabinet door 19 is opened can the cover 18 be opened. Without the cabinet door 19 being opened, the cover 18 cannot be opened. When the cabinet door 19 is in the closed state, as Figure 7 shown, at this time the first spring 26 is in a compressed state, the first moving rod 24 is located in the positioning hole 27 in the positioning block 22, and the cover 18 cannot be opened. Only after the cabinet door 19 is opened, without the restriction of the first push rod 20, the elastic force of the first spring 26 drives the first moving rod 24 to move rightward in the Figure 7 direction shown, as Figure 8 shown, at this time the first moving rod 24 is separated from the positioning hole 27, and the cover 18 can be rotated and opened.

[0037] 2. Only after the cover 18 is closed can the cabinet door 19 be closed. Before the cover 18 is closed, the cabinet door 19 cannot be closed. When the cover 18 is in the closed state, as Figure 9 shown, the second push rod 23 pushes the second inclined surface 31 to overcome the elastic force of the second spring 30, causing the jack 32 on the second moving rod 33 to move to a position where it cooperates with the insertion rod 21. At this time, when the cabinet door 19 rotates, the insertion rod 21 can enter the jack 32 to complete the closing of the cabinet door 19. When the cover 18 is in the open state, as Figure 10 shown, the second push rod 23 loses the limit on the second inclined surface 31, the second spring 30 pushes the second moving rod 33 to move leftward, and the jack 32 on the second moving rod 33 no longer cooperates with the insertion rod 21. When the cabinet door 19 wants to rotate and close, the insertion rod 21 thereon will touch the second moving rod 33 and cannot be closed.

[0038] The technical solution of the present invention is not limited within the scope of the embodiments described in the present invention. The technical content not described in detail in the present invention is all well-known technology.

Claims

1. A closed electrical device cabinet, characterized in that: Including an automatic fire extinguishing device, the automatic fire extinguishing device is provided with a bottom plate (5), and a cover plate (2) is provided on the bottom plate (5). Both ends in the length direction of the cover plate (2) are detachably fixed on the bottom plate (5) through buckles (4). An exhaust channel (15) is left between the cover plate (2) and the bottom plate (5). A fire extinguishing agent (10) and a temperature-sensitive detection starting wire (1) are installed in the exhaust channel (15). The temperature-sensitive detection starting wire (1) extends out of the cover plate (2). A desiccant (13) is installed between the cover plate (2) and the bottom plate (5). An operation indicator light (8) and a starting indicator light (9) are arranged on the cover plate (2). An observation window (12) is also opened on the cover plate (2) above the fire extinguishing agent (10). Rivet holes (3) are opened at the four corner positions of the bottom plate (5); The automatic fire extinguishing device is installed at the top position inside the electrical device cabinet. A snap cover (18) that can be rotated to open and close is provided at the top of the electrical device cabinet. The automatic fire extinguishing device is fixed to the bottom of the snap cover (18). A cabinet door (19) that can be rotated is provided on the front end face of the electrical device cabinet. An opening and closing linkage mechanism is installed between the cabinet door (19) and the snap cover (18). The setting of the opening and closing linkage mechanism enables the snap cover (18) to be opened only after the cabinet door (19) is opened, and the cabinet door (19) can be closed only after the snap cover (18) is closed. The opening and closing linkage mechanism includes a first push rod (20) and a plug rod (21) provided on the cabinet door (19). A positioning block (22) and a second push rod (23) are installed at the bottom of the snap cover (18). A first moving rod (24) and a second moving rod (33) are installed inside the cabinet body of the electrical device cabinet. A first convex edge (25) is provided on the first moving rod (24). A first spring (26) is installed on the first moving rod (24) on one side of the first convex edge (25). A positioning hole (27) that matches the first moving rod (24) is formed on the positioning block (22). The first spring (26) always has a tendency to move the first moving rod (24) away from the positioning hole (27). A first inclined surface (28) that matches the first push rod (20) is further provided at the end of the first moving rod (24). When the cabinet door (19) is closed, the first push rod (20) pushes the first inclined surface (28) to overcome the elastic force of the first spring (26), so that the first moving rod (24) enters the positioning hole (27) to restrict the rotation of the snap cover (18). A second convex edge (29) is provided on the second moving rod (33). A second spring (30) is installed on the second moving rod (33) on one side of the second convex edge (29). A second inclined surface (31) that matches the second push rod (23) is provided at one end of the second moving rod (33). The second inclined surface (31) is arranged perpendicular to the first inclined surface (28). A jack (32) that matches the plug rod (21) is further provided on the second moving rod (33). The second spring (30) always has a tendency to push the second moving rod (33) to separate the jack (32) thereon from the plug rod (21). When the snap cover (18) is closed, the second push rod (23) pushes the second inclined surface (31) to overcome the elastic force of the second spring (30), so that the second moving rod (33) and the jack (32) thereon move to a position where they match the plug rod (21).

2. The enclosed electrical device cabinet according to claim 1, characterized in that: An electronic control element (11) is installed between the cover plate (2) and the bottom plate (5). The electronic control element (11) is connected to the fire extinguishing agent (10) through an electric start wire (16) and an electric feedback wire (17). A remote feedback wire (6) and a remote start wire (7) are further connected to the electronic control element (11). Both the remote feedback wire (6) and the remote start wire (7) extend out of the exhaust passage (15).

3. The enclosed electrical device cabinet according to claim 1, wherein: A double-sided adhesive layer (14) is installed on the rear side surface of the bottom plate (5).

4. A closed electrical device cabinet according to claim 1, characterized in that: The fire extinguishing agent (10) is composed of potassium carbonate, sodium bicarbonate, sucrose, starch, carbon powder, melamine polyphosphate, and tartrate salt.

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