Electric appliance cabinet with fireproof and smoke alarm functions

Abstract

The invention discloses an electric appliance cabinet with fireproof and smoke alarm functions, which comprises an electric appliance cabinet body, a carbon dioxide storage box is installed in the electric appliance cabinet body, a conveying pipe is installed on the carbon dioxide storage box, an electromagnetic valve is installed on the conveying pipe, and when an infrared temperature imager monitors that an electric appliance switch is abnormal, the electromagnetic valve is switched on and off. The lifting plate drives the rectangular frame to be opposite to the electric appliance switch, the rectangular frame is further close to the electric appliance switch, the electromagnetic valve is opened, carbon dioxide is conveyed into the rectangular frame through the conveying pipe, and the carbon dioxide is discharged through the rectangular frame and blown to the electric appliance switch. Effective heat dissipation and dust removal are achieved through the fan, the lifting plate, the rectangular frame and the like, and the influence of dust on an electric appliance switch is reduced; compared with the prior art, the infrared temperature imager is used for monitoring temperature abnormity, the lifting plate can be driven to accurately cool, and short circuit or fire disasters are avoided; when the smoke alarm is triggered, carbon dioxide is accurately sprayed to a fire point through a specific structure, the targeted fire extinguishing effect is good, and efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical cabinets, and in particular to an electrical cabinet with fire prevention and smoke alarm functions. Background Art

[0002] Electrical cabinets, also known as distribution cabinets, are classified into power distribution cabinets, lighting distribution cabinets, and metering cabinets. They are the final stage of the power distribution system. A distribution cabinet is a general term for motor control centers (MCCs). Distribution cabinets are used in applications with dispersed loads and a small number of circuits, while MCCs are used in applications with concentrated loads and a large number of circuits. They distribute power from a circuit in the upper-level distribution equipment to the nearest load. This level of equipment should provide protection, monitoring, and control for the loads.

[0003] Electrical cabinets are equipped with numerous switches connected to multiple wires. During use, insulation damage can cause short circuits or prolonged overloads, raising wire temperatures and generating strong sparks and arcs. This rapidly burns the insulation, melting the metal and igniting surrounding combustibles, potentially leading to fires. Prior art publication number CN117767124A describes a high- and low-voltage distribution cabinet with fire monitoring. This solves the problem of existing high- and low-voltage distribution cabinets being equipped with fire extinguishers but only deployed in the event of a fire, damaging the circuits and failing to prevent fires at the source.

[0004] However, in actual use, the fire extinguishing hood is at a certain distance from the electrical switch, resulting in poor fire extinguishing effect of the fire extinguishing agent sprayed from the fire extinguishing hood on the fire point; secondly, during use, the insulation of the wires may be damaged, resulting in a short circuit or long-term overload, causing the temperature of the wires to rise. If the heat is effectively dissipated, overload fire can also be avoided. However, the above-mentioned prior art has poor heat dissipation effect on the inside of the electrical cabinet; for this reason, the present application proposes an electrical cabinet with fire protection and smoke alarm functions. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and to propose an electrical cabinet with fire prevention and smoke alarm functions.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An electrical cabinet with fire prevention and smoke alarm functions includes an electrical cabinet, a mounting rack installed in the electrical cabinet, a plurality of electrical switches installed on the mounting rack, a smoke alarm, an infrared temperature imager, and a controller installed on the inner top of the electrical cabinet, a lifting plate that can move up and down is provided in the electrical cabinet, a rectangular groove is provided on the lifting plate, a rectangular frame is slidably connected in the rectangular groove, a rotatable dust filter plate is provided in the rectangular frame, a carbon dioxide storage box is installed in the electrical cabinet, a delivery pipe is installed on the carbon dioxide storage box, and an electromagnetic valve is installed on the delivery pipe. When the infrared temperature imager detects an abnormality in the electrical switch, the lifting plate drives the rectangular frame to face the electrical switch and the rectangular frame moves closer to the electrical switch. The electromagnetic valve opens and the carbon dioxide is delivered to the rectangular frame through the delivery pipe. The carbon dioxide is discharged through the rectangular frame and blown toward the electrical switch.

[0008] Preferably, two piston cylinders are installed in the rectangular groove, the two piston cylinders are connected to the delivery pipe through a T-tube, and a movable piston is slidably connected in the piston cylinder, a connecting tube is fixed on the movable piston, an electromagnetic pressure relief valve is installed on the connecting tube, and a connecting plate connected to the rectangular frame is fixed on the connecting tube.

[0009] Preferably, connecting blocks are fixed at both ends of the lifting plate, a screw with a threaded connection passes through the connecting block, a transmission rod is fixed at the bottom of the two screw rods, a transmission wheel is installed on the two transmission rods, and the two transmission wheels are connected by a transmission belt, one of the transmission rods is rotatably installed with the inner bottom of the electrical cabinet, a driving structure is installed on the inner bottom of the electrical cabinet, a driving shaft is provided on the driving structure, and the other transmission rod is connected to the driving shaft.

[0010] Preferably, an exhaust hole is provided on one side of the electrical cabinet, a fan is installed on the side of the electrical cabinet away from the exhaust hole, an exhaust pipe is installed at the exhaust end of the fan, and the exhaust pipe is connected to the lifting plate through an air supply pipe.

[0011] Preferably, a plurality of first springs are fixed on the connecting plate, and the other ends of the first springs are fixedly connected to the inner wall of the rectangular groove.

[0012] Preferably, a second spring is fixed on the movable piston, and the other end of the second spring is connected to the piston cylinder.

[0013] Preferably, a sleeve is fixed on the dust filter plate, a rotating shaft is rotatably connected inside the sleeve, and the rotating shaft is rotatably connected to the inner wall of the rectangular frame.

[0014] Preferably, it also includes a driving mechanism for driving the rotating shaft to rotate, and the driving mechanism includes a power box fixed on a rectangular frame, and a meshing worm and worm wheel are provided in the power box, and the end of the worm passes through the power box and is rotatably connected thereto, and a gear is fixed on the worm, and a rack plate is fixed on the inner bottom of the electrical cabinet, and the gear can mesh with the rack plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Improve the heat dissipation effect: By setting up a lifting plate and a rectangular frame that can move up and down, a fan is used to transport external air into the electrical cabinet and exhaust it through the rectangular frame to effectively dissipate heat for the electrical switches.

[0017] 2. The rectangular frame is set close to the electrical switch, which can also blow away the dust on the electrical switch, further reducing the impact of dust on the electrical switch, thereby enhancing the heat dissipation performance inside the electrical cabinet and avoiding short circuits or fires caused by long-term high temperatures.

[0018] 3. Precise cooling and fire prevention: When the infrared temperature imager detects an abnormal temperature in a row of electrical switches, the controller controls the drive structure to move the lifting plate and rectangular frame, aligning the rectangular frame with the row of switches. Air is directed toward the switches, effectively reducing the temperature. If the temperature continues to rise and smoke is generated, the smoke alarm activates, and the controller controls the solenoid valve to open, pumping carbon dioxide through the rectangular frame and discharging it toward the electrical switches, isolating them from outside air and preventing fires, achieving precise cooling and fire prevention.

[0019] 4. Automatic Dust Removal: A rotatable dust filter plate is installed within the rectangular frame. As air is discharged through the frame, the plate filters dust from the air. When the frame follows the lifting plate down to the bottom, the gear and rack engage, driving the plate to rotate 180°. The fan then continues to operate, back-blowing the plate and removing impurities and dust into the impurity collection frame. This achieves automatic dust removal, maintains the filter plate's filtering effectiveness, and reduces dust damage to electrical switches.

[0020] 5. Targeted Fire Extinguishing: When a short circuit causes a fire, the cabinet uses an infrared temperature imager and smoke alarm to promptly detect the fire point. This then controls the opening of a solenoid valve, pumping carbon dioxide through a rectangular frame and then blowing it toward the electrical switch, isolating the fire point from the outside air and achieving targeted fire extinguishing. Compared to existing technologies, this method offers greater fire extinguishing effectiveness and efficiency, effectively preventing the spread of fire and ensuring the safe operation of the cabinet.

[0021] In summary, the present invention achieves effective heat dissipation and dust removal through fans, lifting plates, rectangular frames, etc., reducing the impact of dust on electrical switches; compared with the existing technology, the infrared temperature imager monitors temperature anomalies to drive the lifting plate to accurately cool down, avoiding short circuits or fires; when the smoke alarm is triggered, carbon dioxide is precisely sprayed toward the fire point through a specific structure, and the targeted fire extinguishing effect is good and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0023] Figure 2 This is a side view of an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the interior structure of an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0025] Figure 4 This is a structural diagram of a transmission belt in an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0026] Figure 5 This is a structural schematic diagram of a dust filter plate in an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0027] Figure 6 This is a structural diagram of a rectangular slot in an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0028] Figure 7 This is a structural schematic diagram of the disassembled rectangular frame of an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0029] Figure 8 This is a structural diagram of the piston cylinder in an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention;

[0030] Figure 9 This is a structural schematic diagram of a worm gear in an electrical cabinet with fire protection and smoke alarm functions proposed by the present invention.

[0031] In the figure: 1 electrical cabinet, 2 exhaust holes, 3 exhaust pipe, 4 mounting frame, 5 drive structure, 6 screw, 7 transmission belt, 8 lifting plate, 9 impurity collection frame, 10 fan, 11 carbon dioxide storage box, 12 delivery pipe, 13 transmission rod, 14 transmission wheel, 15 smoke alarm, 16 infrared temperature imager, 17 controller, 18 solenoid valve, 19 rack plate, 20 air supply pipe, 21 connecting block, 22 rectangular frame, 23 power box, 24 gear, 25 dust filter plate, 26 rotating shaft, 27 sleeve, 28 connecting plate, 29 piston cylinder, 30 first spring, 31 movable piston, 32 limiting ring, 33 T-tube, 34 electromagnetic pressure relief valve, 35 second spring, 36 connecting pipe, 37 worm, 38 worm wheel, 39 short shaft, 40 rectangular groove, 41 one-way bearing. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Reference Figures 1-9 An electrical cabinet with fire prevention and smoke alarm functions includes an electrical cabinet 1, an exhaust hole 2 is penetrated on one side of the electrical cabinet 1, a fan 10 is installed on the side of the electrical cabinet 1 away from the exhaust hole 2, an exhaust pipe 3 is installed on the exhaust end of the fan 10, the exhaust pipe 3 is connected to the lifting plate 8 through an air supply pipe 20, and the air supply pipe 20 is a hose, which can be arranged according to actual conditions to meet the needs of transporting air into the lifting plate 8 and meeting the lifting of the lifting plate 8.

[0034] A mounting bracket 4 is installed within the electrical cabinet 1, on which multiple electrical switches are mounted. A smoke alarm 15, an infrared temperature imager 16, and a controller 17 are mounted on the top of the cabinet 1. The smoke alarm 15 includes a smoke sensor and an alarm, which are connected to the controller 17. When the smoke sensor detects smoke, it transmits the signal to the controller 17, which then controls the alarm. The infrared temperature imager 16 is used to detect the temperature of the electrical switches. The infrared temperature imager 16 utilizes an infrared detector and an optical imaging lens to receive the infrared radiation energy distribution pattern of the target being measured and reflects it onto the infrared detector's photosensitive element, thereby generating an infrared thermal image. This thermal image corresponds to the thermal distribution field on the surface of the object. By analyzing the thermal image, the temperature distribution of the surface can be intuitively understood.

[0035] A lifting plate 8 that can move up and down is provided in the electrical cabinet 1. Connecting blocks 21 are fixed at both ends of the lifting plate 8. A screw 6 with a threaded connection is passed through the connecting block 21. A transmission rod 13 is fixed at the bottom of the two screws 6. A transmission wheel 14 is installed on the two transmission rods 13. The two transmission wheels 14 are connected by a transmission belt 7. The transmission of the transmission wheel 14 and the transmission belt 7 can realize the synchronous rotation of the two transmission rods 13.

[0036] One of the transmission rods 13 is rotatably mounted on the inner bottom of the electrical cabinet 1. A driving structure 5 is installed on the inner bottom of the electrical cabinet 1. A driving shaft is provided on the driving structure 5, and the other transmission rod 13 is connected to the driving shaft. The driving structure 5 includes a housing and two meshing bevel gears located in the housing. The driving shaft is connected to one of the bevel gears. A motor is installed on the housing, and the output end of the motor is connected to the other bevel gear.

[0037] A rectangular groove 40 is provided on the lifting plate 8 , and a rectangular frame 22 is slidably connected in the rectangular groove 40 . The rectangular frame 22 is arranged close to the electrical switch but does not interfere with the electrical switch.

[0038] A rotatable dust filter plate 25 is provided in the rectangular frame 22, and a sleeve 27 is fixed on the dust filter plate 25. A rotating shaft 26 is rotatably connected in the sleeve 27. The rotating shaft 26 is rotatably connected to the inner wall of the rectangular frame 22. It also includes a driving mechanism for driving the rotating shaft 26 to rotate. The driving mechanism includes a power box 23 fixed on the rectangular frame 22, and a meshing worm 37 and a worm wheel 38 are provided in the power box 23. The end of the worm 37 passes through the power box 23 and is rotatably connected thereto. A gear 24 is fixed on the worm 37, and a rack plate 19 is fixed to the inner bottom of the electrical cabinet 1. The gear 24 can mesh with the rack plate 19.

[0039] A carbon dioxide storage box 11 is installed in the electrical cabinet 1, and a delivery pipe 12 is installed on the carbon dioxide storage box 11. A solenoid valve 18 is installed on the delivery pipe 12. When the infrared temperature imager 16 detects an abnormality in the electrical switch, the lifting plate 8 drives the rectangular frame 22 to face the electrical switch and the rectangular frame 22 moves closer to the electrical switch. The solenoid valve 18 opens and the carbon dioxide is delivered to the rectangular frame 22 through the delivery pipe 12. The carbon dioxide is discharged through the rectangular frame 22 and blown toward the electrical switch.

[0040] Further explanation: Two piston cylinders 29 are installed in the rectangular groove 40, and the two piston cylinders 29 are connected to the delivery pipe 12 through a T-tube 33, and a mobile piston 31 is slidably connected in the piston cylinder 29, and a second spring 35 is fixed on the mobile piston 31, and the other end of the second spring 35 is connected to the piston cylinder 29; a connecting pipe 36 is fixed on the mobile piston 31, and an electromagnetic pressure relief valve 34 is installed on the connecting pipe 36, and a connecting plate 28 connected to the rectangular frame 22 is fixed on the connecting pipe 36, and multiple first springs 30 are fixed on the connecting plate 28, and the other end of the first spring 30 is fixedly connected to the inner wall of the rectangular groove 40.

[0041] When the present invention is in use, the driving structure 5 drives the transmission rod 13 to rotate, and the rotation of the transmission rod 13 drives the transmission wheel 14 to rotate. Through the transmission of the transmission belt 7, the two transmission rods 13 can be rotated synchronously, and then the two screws 6 can be rotated synchronously. Among them, the screw 6 is a reciprocating screw. The rotation of the screw 6 causes the two connecting blocks 21 and the lifting plate 8 to move back and forth up and down. The reciprocating movement of the lifting plate 8 drives the rectangular frame 22 to move back and forth up and down.

[0042] When the fan 10 is working, it can transport external air into the lifting plate 8 through the exhaust pipe 3 and the delivery pipe 12. The air is transported to the rectangular groove 40 and the rectangular frame 22, and finally discharged through the rectangular frame 22. Since the rectangular frame 22 moves up and down, it can effectively dissipate heat for electrical switches and the like in the electrical cabinet 1.

[0043] When the air is discharged through the rectangular frame 22, the dust in the air can be filtered through the dust filter plate 25, thereby filtering out impurities such as dust, reducing the impact of dust on electrical switches, and protecting the electrical switches.

[0044] However, there are still very small dust particles that cannot be filtered, and there are still some small particles of dust on the electrical switch. Since the rectangular frame 22 is set close to the electrical switch, when the rectangular frame 22 is close to the electrical switch, the dust on the electrical switch can be effectively blown away, thereby realizing the dust removal treatment of the electrical switch. The dust is blown up by the air and the dust is discharged through the exhaust hole 2 along with the air, so that the dust can be discharged to the outside of the electrical cabinet 1.

[0045] When the rectangular frame 22 follows the lifting plate 8 to move down to the lowest end, during the downward movement, the gear 24 meshes with the rack plate 19, and the gear 24 rolls on the rack plate 19, thereby driving the worm 37 to rotate, and the rotation of the worm 37 drives the one-way bearing 41 and the worm gear 38 to rotate, and the rotation of the worm gear 38 drives the short shaft 39 to rotate, and the rotation of the short shaft 39 drives the rotating shaft 26 to rotate, and the rotation of the rotating shaft 26 drives the sleeve 27 and the dust filter plate 25 to rotate. When the lifting plate 8 drops to the lowest position and moves up, the filter The dust plate 25 rotates 180°, that is, the filtering surface of the dust filter plate 25 faces outward; since an impurity collection frame 9 is installed in the electrical cabinet 1, the height of the impurity collection frame 9 matches the height of the rack plate 19, and its fan 10 continues to work, the dust filter plate 25 can be backblown and cleaned during the rotation of the dust filter plate 25, so that the dust filter plate 25 can be cleaned, and the backblown impurities and dust are blown into the impurity collection frame 9. Since a short-bristled brush is provided in the impurity collection frame 9, the blown impurities and dust can be collected.

[0046] When the lifting plate 8 moves upward, the gear 24 drives the worm 37 to rotate, and the rotation of the worm 37 drives the worm wheel 38 to rotate. Under the action of the one-way bearing 41, the worm wheel 38 and the short shaft 39 rotate relative to each other, that is, the short shaft 39 no longer rotates, and the dust filter plate 25 remains stationary. In this way, the dust and impurities on the dust filter plate 25 can be effectively processed by using the backblowing of air.

[0047] Such reciprocating operation can realize intermittent rotation of the dust filter plate 25 and back-flushing and cleaning of the filter surface.

[0048] When the infrared temperature imager 16 detects that the temperature of a row of electrical switches is abnormal, such as the temperature is high but does not reach the ignition point of the switch, the infrared temperature imager 16 transmits a signal value to the controller 17. The controller 17 controls the driving structure 5 to work, and the lifting plate 8 and the rectangular frame 22 move so that the rectangular frame 22 is opposite to this row of switches. Air blows directly on the electrical switch, thereby effectively cooling it and avoiding long-term high temperature causing short circuit or fire.

[0049] After the temperature drops, the driving structure 5 continues to work, driving the lifting plate 8 to move back and forth.

[0050] If the temperature of the electrical switch rises and smoke is generated, the smoke alarm 15 works and transmits a signal to the controller 17. The controller 17 controls the solenoid valve 18 to open. When the solenoid valve 18 opens, carbon dioxide is transported to the T-tube 33 through the delivery pipe 8, and then to the two piston cylinders 29. The pressure increase in the piston cylinder 29 drives the moving piston 31 and the connecting pipe 36 to move, thereby driving the connecting plate 28 and the rectangular frame 22 to move, and finally the moving piston 31 is against the limit ring 32. At this time, the rectangular frame 22 is closer to the electrical switch. When the pressure at the connecting pipe 36 is greater than the threshold of the electromagnetic pressure relief valve 34, the electromagnetic pressure relief valve 34 opens, and carbon dioxide is discharged into the rectangular frame 22 through the connecting pipe 36, and finally discharged through the rectangular frame 22 to blow towards the electrical switch. In this way, this part of the electrical switch can be isolated from the outside air, so that it will not burn, thereby avoiding fire.

[0051] In this way, when a fire occurs at the moment of a short circuit, the above method can extinguish the fire at the fire point in a targeted manner, which is more effective and efficient than the existing technology.

[0052] After the fire is extinguished, the first spring 30 and the second spring 35 are used to reset the movable piston 31 and the connecting plate 28 , and the electromagnetic pressure relief valve 34 is closed.

[0053] The controller 17 is provided with a transmission module, which can send a signal when a fire occurs so that the staff can deal with it in time.

[0054] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An electrical cabinet with fire prevention and smoke alarm functions, comprising an electrical cabinet (1), a mounting frame (4) installed in the electrical cabinet (1), and a plurality of electrical switches installed on the mounting frame (4), characterized in that: The top of the electrical cabinet (1) is provided with a smoke alarm (15), an infrared temperature imager (16), and a controller (17). The electrical cabinet (1) is provided with a lifting plate (8) that can move up and down. The lifting plate (8) is provided with a rectangular groove (40). A rectangular frame (22) is slidably connected in the rectangular groove (40). A dust filter plate (25) that can rotate is provided in the rectangular frame (22). A carbon dioxide storage box (11) is installed in the electrical cabinet (1). A delivery pipe (12) is installed on the carbon dioxide storage box (11). A solenoid valve (18) is installed on the delivery pipe (12). When the infrared temperature imager (16) monitors an abnormality of the electrical switch, the lifting plate (8) drives the rectangular frame (22) to face the electrical switch and the rectangular frame (22) is further close to the electrical switch. The solenoid valve (18) opens and the carbon dioxide is delivered to the rectangular frame (22) through the delivery pipe (12). The carbon dioxide is discharged through the rectangular frame (22) and blown toward the electrical switch.

2. The electrical cabinet with fire protection and smoke alarm functions according to claim 1, characterized in that: Two piston cylinders (29) are installed in the rectangular groove (40), and the two piston cylinders (29) are connected to the delivery pipe (12) through a T-tube (33). A movable piston (31) is slidably connected in the piston cylinder (29), and a connecting pipe (36) is fixed on the movable piston (31). An electromagnetic pressure relief valve (34) is installed on the connecting pipe (36), and a connecting plate (28) connected to the rectangular frame (22) is fixed on the connecting pipe (36).

3. The electrical cabinet with fire protection and smoke alarm functions according to claim 1, characterized in that: Both ends of the lifting plate (8) are fixed with connecting blocks (21), and a screw rod (6) connected by a thread is passed through the connecting block (21). The bottoms of the two screw rods (6) are fixed with a transmission rod (13), and the two transmission rods (13) are installed with a transmission wheel (14). The two transmission wheels (14) are connected by a transmission belt (7). One of the transmission rods (13) is rotatably installed with the inner bottom of the electrical cabinet (1). The inner bottom of the electrical cabinet (1) is installed with a driving structure (5), and the driving structure (5) is provided with a driving shaft. The other transmission rod (13) is connected to the driving shaft.

4. The electrical cabinet with fire protection and smoke alarm functions according to claim 1, characterized in that: An exhaust hole (2) is provided through one side of the electrical cabinet (1), a fan (10) is installed on the side of the electrical cabinet (1) away from the exhaust hole (2), an exhaust pipe (3) is installed at the exhaust end of the fan (10), and the exhaust pipe (3) is connected to the lifting plate (8) through an air supply pipe (20).

5. The electrical cabinet with fire protection and smoke alarm functions according to claim 2, characterized in that: A plurality of first springs (30) are fixed on the connecting plate (28), and the other ends of the first springs (30) are fixedly connected to the inner wall of the rectangular groove (40).

6. The electrical cabinet with fire protection and smoke alarm functions according to claim 2, characterized in that: A second spring (35) is fixed on the movable piston (31), and the other end of the second spring (35) is connected to the piston cylinder (29).

7. The electrical cabinet with fire protection and smoke alarm functions according to claim 1, characterized in that: A sleeve (27) is fixed on the dust filter plate (25), a rotating shaft (26) is rotatably connected inside the sleeve (27), and the rotating shaft (26) is rotatably connected to the inner wall of the rectangular frame (22).

8. The electrical cabinet with fire protection and smoke alarm functions according to claim 7, characterized in that: The invention also includes a driving mechanism for driving the rotating shaft (26) to rotate, wherein the driving mechanism includes a power box (23) fixed on the rectangular frame (22), wherein a worm (37) and a worm wheel (38) are provided in the power box (23) and meshed with each other, wherein the end of the worm (37) passes through the power box (23) and is rotatably connected thereto, wherein a gear (24) is fixed on the worm (37), and a short shaft (39) is fixedly connected to the worm wheel (38), wherein the short shaft (39) is fixedly connected to the rotating shaft (26), and a rack plate (19) is fixed on the inner bottom of the electrical cabinet (1), and the gear (24) can mesh with the rack plate (19).

9. The electrical cabinet with fire protection and smoke alarm functions according to claim 1, characterized in that: A limiting ring (32) is fixed on the inner wall of the piston cylinder (29), and the inner diameter of the limiting ring (32) is smaller than the outer diameter of the movable piston (31).

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