An electric control cabinet with fireproof function

Abstract

This invention discloses a fire-resistant electrical control cabinet, relating to the field of electrical control cabinet technology. It includes a cabinet body with multiple mounting cavities arranged along its height. Each mounting cavity contains a module mounting plate. An air supply cavity is located on one side of each mounting cavity, and a storage cavity is located at the bottom of the cabinet. Multiple air inlets connected to the air supply cavity are located on one side of each mounting cavity, and multiple exhaust ports connected to the outside of the cabinet are located on the other side. A pair of baffles are slidably arranged inside the mounting cavities, within the air inlets and exhaust ports. This invention reduces the volume of each mounting cavity by dividing the cabinet body into multiple mounting cavities, facilitating the rapid filling of the cavities with fire extinguishing gas. Simultaneously, it prevents the fire from affecting all electrical distribution modules within the cabinet. The baffles can seal the air inlets and exhaust ports, preventing oxygen-containing air from entering the mounting cavity where a fire occurs.

Description

Technical Field

[0001] This invention relates to the field of electrical control cabinet technology, specifically to an electrical control cabinet with fireproof function. Background Technology

[0002] An electrical control cabinet is a control cabinet in which power distribution modules are assembled in a closed or semi-closed metal cabinet according to electrical wiring requirements. Its layout should meet the requirements of normal operation of the power system, facilitate maintenance, and not endanger the safety of personnel and surrounding equipment. A large number of power distribution modules are installed inside the power distribution cabinet. When the modules are old or short-circuited, fires can easily occur.

[0003] For example, the invention patent with announcement number CN112398012B discloses a self-triggering fireproof switchgear. In view of the problem that the existing switchgear has poor fire resistance and does not have an independent fire extinguishing function, resulting in poor safety of low-voltage switchgear, the following solution is proposed. It includes a switchgear body and a carbon dioxide storage tank. The top side of the switchgear body has an installation hole, and a heating cylinder is fixedly installed in the installation hole. A box is fixedly installed on the top of the heating cylinder. The carbon dioxide storage tank is fixedly installed on the top of the switchgear body, and the gas outlet of the carbon dioxide storage tank is connected to one end of the gas outlet pipe.

[0004] However, the existing electrical control cabinet has a large cavity volume, which takes a certain amount of time for the extinguishing gas to fill the cavity when a fire occurs, reducing the extinguishing speed. In addition, the extinguishing components have a slow response speed when a fire occurs, resulting in poor performance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an electrical control cabinet with fireproof function, which solves the technical problem of poor fire extinguishing speed of existing devices when a fire occurs.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an electrical control cabinet with fireproof function, including a cabinet body, wherein multiple mounting cavities are provided in the cabinet body along the height direction, each mounting cavity is provided with a module mounting plate, an air supply cavity is provided on one side of the multiple mounting cavities in the cabinet body, and a storage cavity is provided at the bottom of the cabinet body;

[0007] The mounting cavity has multiple air inlets connected to the air supply cavity on one side, and multiple exhaust ports connected to the outside of the cabinet on the other side. A pair of baffles are slidably arranged inside the mounting cavity and inside the air inlets and exhaust ports. The baffles have openings corresponding to the multiple exhaust ports and multiple air inlets. A fixing frame is provided at the top of the mounting cavity. A pair of pins are slidably arranged at both ends of the fixing frame. The baffles have insertion holes that match the pins. A heat-sensitive shrink assembly is connected between the pair of pins. When a fire occurs, the heat-sensitive shrink assembly is triggered. At this time, the pair of pins move inward. When the pair of pins are inserted into the insertion holes in the pair of baffles, the openings correspond to the exhaust ports or air inlets.

[0008] A valve is fixedly installed on one side of the air inlet in the installation cavity. The valve is connected to a baffle for sealing the air inlet. The outlet of the valve is connected to a jet pipe. A fire extinguishing gas cylinder is installed in the storage cavity. The fire extinguishing gas cylinder is connected to a gas supply pipe. The gas supply pipe extends to one side of multiple installation cavities. The air inlet of the valve in each installation cavity is connected to the gas supply pipe through a branch pipe. When the baffle is lowered, the valve is opened. The high-pressure gas in the fire extinguishing gas cylinder enters the valve through the gas supply pipe and the branch pipe, and is finally sprayed into the installation cavity through the jet pipe.

[0009] Preferably, the heat-sensitive shrink assembly includes multiple support rods and multiple heat-sensitive top rods. A pair of springs are provided inside the fixing frame to push a pair of pins to move inward. The multiple support rods are slidably installed inside the fixing frame. The inner ends of the pair of pins and both ends of the support rods are fixedly provided with mounting plates. The heat-sensitive top rod is disposed between two adjacent mounting plates.

[0010] Preferably, the plurality of thermal push rods are respectively disposed above the plurality of power distribution modules mounted on the module mounting plate.

[0011] Preferably, a groove is provided on the side wall of the mounting plate, and the end of the thermal push rod is inserted into the groove.

[0012] Preferably, a second spring is installed above the baffle, and the second spring abuts against the upper wall of the mounting cavity.

[0013] Preferably, a one-way exhaust valve communicating with the outside is provided on the top of the mounting cavity near the exhaust port.

[0014] Preferably, an air intake fan is installed at the bottom of the air supply chamber, and a filter plate is installed on the outer side of the air intake end of the air intake fan.

[0015] Preferably, the valve has an air chamber one connected to the branch pipe and an air chamber two connected to the jet pipe. The air chamber one and the air chamber two are connected through a valve seat. A push rod is slidably arranged inside the valve. One end of the push rod is fixedly installed with a valve core for blocking the valve seat, and the other end of the push rod abuts against the baffle for blocking the air inlet.

[0016] Preferably, the cabinet body has an access port on the front side of each of the mounting cavities, and each access port is hinged to a cabinet door, with a sealing strip at the edge of the cabinet door.

[0017] Beneficial effects

[0018] This invention provides an electrical control cabinet with fireproof function, which has the following beneficial effects: by dividing the cabinet into multiple installation cavities to reduce the volume of each cavity, it is easy to quickly fill the cavity with extinguishing gas. At the same time, it can also prevent the fire from affecting all the power distribution modules in the cabinet. By filling the installation cavity with extinguishing gas, the power distribution modules are prevented from contacting oxygen, thus extinguishing the fire. The air inlet and outlet can be blocked by baffles to prevent external oxygen-containing air from entering the installation cavity where the fire occurs. The one-way exhaust valve can facilitate the discharge of air in the installation cavity when the extinguishing gas enters, creating favorable conditions for fire extinguishing. The heat-sensitive push rods set above each power distribution module can improve the response speed in the event of a fire. When any heat-sensitive push rod is deformed by heat, it can be activated to fill the installation cavity with extinguishing gas, achieving rapid fire extinguishing. The fire extinguishing program does not require electrical control. When a fire occurs, the mechanical structure design can simultaneously extinguish the fire and prevent external oxygen from entering the installation cavity. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a perspective view of the internal structure of the present invention;

[0021] Figure 3 A 3D view of the cabinet;

[0022] Figure 4 The three-dimensional effect after the cabinet door is opened Figure 1 ;

[0023] Figure 5 The three-dimensional effect after the cabinet door is opened Figure 1 ;

[0024] Figure 6 for Figure 4 A magnified view of part A in the image;

[0025] Figure 7 for Figure 5A magnified view of part B in the image;

[0026] Figure 8 This is a 3D view of the heat-sensitive shrink assembly;

[0027] Figure 9 This is a 3D view of the baffle.

[0028] Figure 10 This is a diagram of the internal structure of the valve.

[0029] In the diagram: 1. Cabinet; 2. Mounting cavity; 3. Air supply cavity; 4. Storage cavity; 5. Module mounting plate; 6. Air inlet; 7. Exhaust port; 8. Baffle; 9. Opening; 10. Fixing bracket; 11. Pin; 12. Insertion hole; 13. Spring 1; 14. Valve; 15. Jet pipe; 16. Spring 2; 17. Support rod; 18. Mounting plate; 19. Thermal push rod; 20. Push rod; 21. Air cavity 1; 22. Air cavity 2; 23. Valve seat; 24. Valve core; 25. Air intake fan; 26. Fire extinguishing gas cylinder; 27. Air supply pipe; 28. Branch pipe; 29. ​​Cabinet door; 30. One-way exhaust valve; 31. Filter plate; 32. Inspection port. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Please see Figures 1-10 The present invention provides a technical solution: an electrical control cabinet with fireproof function, including a cabinet body 1, a plurality of mounting cavities 2 are arranged along the height direction inside the cabinet body 1, and a module mounting plate 5 for installing a power distribution module is arranged in each mounting cavity 2. By setting multiple mounting cavities 2, the size of the cavity where the electrical control module is located is reduced, which facilitates the rapid filling of the cavity with fire extinguishing gas. At the same time, it avoids the fire from affecting all the power distribution modules in the cabinet body 1 when a fire occurs. A gas supply cavity 3 is arranged on one side of the plurality of mounting cavities 2 inside the cabinet body 1, and a storage cavity 4 is arranged at the bottom of the cabinet body 1.

[0032] One side of the mounting cavity 2 has multiple air inlets 6 connected to the air supply cavity 3, and the other side of the mounting cavity 2 has multiple exhaust outlets 7 connected to the outside of the cabinet 1, providing heat dissipation for the power distribution module. Inside the mounting cavity 2, and inside the air inlets 6 and exhaust outlets 7, a pair of baffles 8 are slidably installed. The baffles 8 have openings 9 corresponding to the multiple exhaust outlets 7 and multiple air inlets 6. A fixing bracket 10 is installed on the top of the mounting cavity 2. A pair of pins 11 are slidably installed at both ends of the fixing bracket 10. The baffles 8 have insertion holes 12 that match the pins 11. A heat-sensitive shrink assembly is connected between the pair of pins 11, which will trigger the heat-sensitive shrink assembly when a fire occurs. When the components are assembled, a pair of pins 11 move inward. When the pins 11 are pulled out from the socket 12, the baffle 8 descends, blocking multiple exhaust ports 7 or multiple air inlets 6 to prevent oxygen-containing external air from entering the installation cavity 2, thus creating favorable conditions for fire extinguishing. When a pair of pins 11 are inserted into the socket 12 in a pair of baffles 8, the opening 9 corresponds to the exhaust port 7 or air inlet 6, ensuring that cooling gas can enter or exit the installation cavity 2. When the pins 11 are pulled out from the socket 12, the baffle 8 descends, blocking multiple exhaust ports 7 or multiple air inlets 6 to prevent oxygen-containing external air from entering the installation cavity 2, thus creating favorable conditions for fire extinguishing.

[0033] A valve 14 is fixedly installed on one side of the air inlet 6 in the installation cavity 2. The valve 14 is connected to the baffle 8 used to block the air inlet 6, realizing the linkage between the baffle 8 and the valve 14. There is no need to add a valve 14 switch control system. The outlet end of the valve 14 is connected to the jet pipe 15. The storage cavity 4 is equipped with a fire extinguishing gas cylinder 26. The fire extinguishing medium in the fire extinguishing gas cylinder 26 is carbon dioxide. The fire extinguishing gas cylinder 26 is connected to the gas supply pipe 27, which extends to one side of multiple installation cavities 2. The air inlet end of the valve 14 in each installation cavity 2 is connected to the gas supply pipe 27 through the branch pipe 28. When the baffle 8 in the installation cavity 2 is lowered, the valve 14 is opened. The high-pressure gas in the fire extinguishing gas cylinder 26 enters the valve 14 through the gas supply pipe 27 and the branch pipe 28, and finally is sprayed into the installation cavity 2 by the jet pipe 15.

[0034] Please see Figure 2 , Figure 8As an embodiment of the present invention, the heat-sensitive shrink assembly includes multiple support rods 17 and multiple heat-sensitive top rods 19. The heat-sensitive top rods 19 are made of fusible alloy. A pair of springs 13 are provided in the fixing frame 10 for pushing a pair of pins 11 to move inward. The multiple support rods 17 are slidably installed in the fixing frame 10. The inner ends of the pair of pins 11 and both ends of the support rods 17 are fixedly provided with clamping plates 18. The heat-sensitive top rods 19 are arranged between two adjacent clamping plates 18. When any heat-sensitive top rod 19 is deformed by heat, the total length between the multiple support rods 17 and the multiple heat-sensitive top rods 19 can be shortened under the push of the springs 13, thereby shortening the distance between the pair of pins 11 and causing the pins 11 to be pulled out from the insertion hole 12.

[0035] Please see Figure 2 As an embodiment of the present invention, multiple thermal rods 19 are respectively disposed above multiple power distribution modules mounted on the module mounting plate 5. When a fire occurs in the power distribution module, the thermal rods 19 can be heated quickly, thereby improving the response speed after a fire.

[0036] Please see Figure 8 As an embodiment of the present invention, a groove (not shown in the figure) is provided on the side wall of the mounting plate 18, and the end of the thermal push rod 19 is inserted into the groove to prevent the thermal push rod 19 from sliding out between the two mounting plates 18 due to vibration or other reasons, thereby reducing the misjudgment rate.

[0037] Please see Figure 6 , Figure 7 As an embodiment of the present invention, a second spring 16 is installed above the baffle 8. The second spring 16 abuts against the upper wall of the mounting cavity 2. The second spring 16 can apply a downward pushing force to the baffle 8. When the pin 11 is pulled out from the insertion hole 12, the baffle 8 can be lowered quickly.

[0038] Please see Figure 1 , Figure 2 , Figure 4 , Figure 7 As an embodiment of the present invention, a one-way exhaust valve 30 connected to the outside is provided on the top of the mounting cavity 2 near the exhaust port 7. When carbon dioxide is discharged into the mounting cavity 2, since the exhaust port 7 is blocked by the baffle 8, the one-way exhaust valve 30 can discharge the oxygen-containing air in the mounting cavity 2 when the fire extinguishing gas enters the mounting cavity, while preventing the outside air from entering the mounting cavity 2. Since the density of carbon dioxide is greater than that of air, setting the one-way exhaust valve 30 on the top of the mounting cavity 2 is also conducive to the discharge of air.

[0039] Please see Figure 2 , Figure 5As an embodiment of the present invention, an air intake fan 25 is installed at the bottom of the air supply chamber 3, and a filter plate 31 is installed on the outer side of the air intake end of the air intake fan 25. The air intake fan 25 can draw external air into the air supply chamber 3, and the air is delivered into each mounting chamber 2 through the air supply chamber 3 and the air inlet 6, so as to provide cooling gas when dissipating heat for the power distribution module.

[0040] Please see Figure 5 , Figure 10 As an embodiment of the present invention, the valve 14 has an air chamber 21 connected to the branch pipe 28 and an air chamber 22 connected to the jet pipe 15. The air chamber 21 and the air chamber 22 are connected through the valve seat 23. A push rod 20 is slidably arranged in the valve 14. One end of the push rod 20 is fixedly installed with a valve core 24 for blocking the valve seat 23. The other end of the push rod 20 abuts against the baffle 8 for blocking the air inlet 6. When the baffle 8 moves downward, the push rod 20 loses its supporting force. The air pressure inside the air chamber 21 can push the valve core 24 to move downward, realizing the connection between the air chamber 21 and the air chamber 22, thereby allowing the carbon dioxide in the branch pipe 28 to pass through the valve 14 and be ejected through the jet pipe 15.

[0041] Please see Figure 4 , Figure 5 As an embodiment of the present invention, the cabinet 1 is provided with an inspection port 32 on the front side of each mounting cavity 2, and each inspection port 32 is hinged to a cabinet door 29, and a sealing strip is provided at the edge of the cabinet door 29.

[0042] The working principle and usage process of this invention are as follows: During use, the power distribution module is installed on the module mounting plate 5 within each mounting cavity 2. The wires are passed through the connection points of each mounting cavity 2 and the cabinet door 29 are sealed to prevent communication between each mounting cavity 2 and the outside, except for the air inlet 6, exhaust outlet 7, and one-way exhaust valve 30. During heat dissipation, the intake fan 25 is activated. External air is filtered by the filter plate 31 and enters the air supply cavity 3. It then enters the mounting cavity 2 through the air inlet 6 to dissipate heat from the internal power distribution module. The heated air is discharged through the exhaust outlet 7. When a fire occurs in the power distribution module, the closest heat-sensitive push rod 19 will deform due to heat. When the heat-sensitive push rod 19 deforms due to heat, the distance between a pair of pins 11 changes, and the spring 13 pushes the pair of pins 11. The plates move closer together, causing the pin 11 to be pulled out of the socket 12. This causes a pair of baffles 8 to descend rapidly under the push of spring 16, sealing the air inlet 6 and exhaust outlet 7 in the fire-prone installation cavity 2, preventing oxygen-laden air from entering the installation cavity 2. When the baffles 8 descend, the valve 14 is opened, and the high-pressure extinguishing gas in the extinguishing gas cylinder 26 is discharged through the gas supply pipe 27, branch pipe 28, and valve 14 via the jet pipe 15, thus filling the fire-prone installation cavity 2 with extinguishing gas. Since the cabinet 1 is divided into multiple installation cavities 2, the volume of each installation cavity 2 is reduced, allowing the extinguishing gas to quickly fill the installation cavity 2, preventing the power distribution module from contacting oxygen and extinguishing the fire on the power distribution module. The one-way exhaust valve 30 also facilitates the discharge of air from the installation cavity 2, creating favorable conditions for fire extinguishing.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrical control cabinet with fireproof function, characterized in that, Includes a cabinet (1), in which multiple mounting cavities (2) are provided along the height direction, and each mounting cavity (2) is provided with a module mounting plate (5). An air supply cavity (3) is provided on one side of the multiple mounting cavities (2) in the cabinet (1), and a storage cavity (4) is provided at the bottom of the cabinet (1). The mounting cavity (2) has multiple air inlets (6) connected to the air supply cavity (3) on one side, and multiple exhaust ports (7) connected to the outside of the cabinet (1) on the other side. A pair of baffles (8) are slidably arranged inside the mounting cavity (2) and inside the air inlets (6) and exhaust ports (7). The baffles (8) have openings (9) corresponding to the multiple exhaust ports (7) and multiple air inlets (6). A fixing frame (10) is provided on the top of the mounting cavity (2), and a fixing frame (10) is slidably arranged at both ends of the fixing frame (10). For the pin (11), the baffle (8) is provided with a socket (12) that matches the pin (11). A heat-sensitive shrink assembly is connected between a pair of pins (11). When a fire occurs, the heat-sensitive shrink assembly will be triggered. At this time, a pair of pins (11) will move inward. When the pin (11) is pulled out from the socket (12), the baffle (8) will drop. The baffle (8) will block multiple exhaust ports (7) or multiple air inlets (6). When a pair of pins (11) are inserted into the socket (12) in a pair of baffles (8), the opening (9) corresponds to the exhaust port (7) or air inlet (6). A valve (14) is fixedly installed in the installation cavity (2) on one side of the air inlet (6). The valve (14) is connected to a baffle (8) for blocking the air inlet (6). The outlet end of the valve (14) is connected to a jet pipe (15). A fire extinguishing gas cylinder (26) is installed in the storage cavity (4). The fire extinguishing gas cylinder (26) is connected to a gas supply pipe (27). The gas supply pipe (27) extends to one side of multiple installation cavities (2). The air inlet end of the valve (14) in each installation cavity (2) is connected to the gas supply pipe (27) through a branch pipe (28). When the baffle (8) is lowered, the valve (14) is opened. The high-pressure gas in the fire extinguishing gas cylinder (26) enters the valve (14) through the gas supply pipe (27) and the branch pipe (28), and is finally sprayed into the installation cavity (2) by the jet pipe (15). The heat-sensitive shrink assembly includes multiple support rods (17) and multiple heat-sensitive top rods (19). The fixing frame (10) is provided with a pair of springs (13) for pushing a pair of pins (11) to move inward. The multiple support rods (17) are slidably installed in the fixing frame (10). The inner ends of the pair of pins (11) and both ends of the support rods (17) are fixedly provided with mounting plates (18). The heat-sensitive top rods (19) are arranged between two adjacent mounting plates (18). Multiple thermal push rods (19) are respectively positioned above multiple power distribution modules mounted on the module mounting plate (5).

2. The fire-resistant electrical control cabinet according to claim 1, characterized in that, The mounting plate (18) has a groove on its side wall, and the end of the thermal push rod (19) is inserted into the groove.

3. The fire-resistant electrical control cabinet according to claim 1, characterized in that, A second spring (16) is installed above the baffle (8), and the second spring (16) abuts against the upper wall of the mounting cavity (2).

4. The fire-resistant electrical control cabinet according to claim 1, characterized in that, The mounting cavity (2) is provided with a one-way exhaust valve (30) connected to the outside on the top side near the exhaust port (7).

5. The fire-resistant electrical control cabinet according to claim 1, characterized in that, An air intake fan (25) is installed at the bottom of the air supply chamber (3), and a filter plate (31) is installed on the outer side of the air intake end of the air intake fan (25).

6. The fire-resistant electrical control cabinet according to claim 1, characterized in that, The valve (14) has an air chamber 1 (21) connected to the branch pipe (28) and an air chamber 2 (22) connected to the jet pipe (15). The air chamber 1 (21) and the air chamber 2 (22) are connected through a valve seat (23). A push rod (20) is slidably arranged in the valve (14). One end of the push rod (20) is fixedly installed with a valve core (24) for blocking the valve seat (23), and the other end of the push rod (20) abuts against the baffle (8) for blocking the air inlet (6).

7. The fire-resistant electrical control cabinet according to claim 1, characterized in that, The cabinet (1) is provided with an inspection port (32) on the front side of each of the mounting cavities (2), and each of the inspection ports (32) is hinged to a cabinet door (29), and the edge of the cabinet door (29) is provided with a sealing strip.

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