Low-voltage power distribution cabinet

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a low-voltage power distribution cabinet which comprises a low-voltage power distribution cabinet base. The fire extinguishing cover can be automatically moved to the outer side of the whole equipment when the low-voltage power distribution cabinet elements located in the equipment fires due to circuit faults, so that air circulation is prevented, and the low-voltage power distribution cabinet elements are all mounted on the convex surface of the electric cabinet main body; low-voltage power distribution cabinet elements can be completely exposed to the outside through the synchronous opening and closing mechanism, and fire extinguishing treatment can be automatically carried out on the equipment while the external exposure area of the low-voltage power distribution cabinet elements located in the equipment is increased; the problems that the power distribution cabinet may cause a fire hazard due to a circuit fault and has certain dangerousness, and the operation space is relatively narrow when wiring and other operations are carried out on internal elements of the power distribution cabinet are solved.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution cabinets, in particular to a low-voltage power distribution cabinet. Background Art

[0002] A distribution cabinet is an electrical device used to distribute electrical energy, protect circuits, and control electrical equipment in a power system. It is widely used in industrial, commercial, and residential buildings to ensure the rational distribution and safe use of electricity.

[0003] The low-voltage distribution cabinet refers to the distribution cabinet used for power distribution, control and protection of 380V / 220V low-voltage power systems. This low-voltage distribution cabinet can ensure the stability and safety of power supply, achieve precise control and protection of current, and quickly disconnect the power supply in abnormal situations, thereby protecting the safety of the power grid.

[0004] However, as the low-voltage distribution cabinet is used for a longer time, its internal structure will gradually age. If the aging is too serious, it is possible to cause a fire due to a circuit failure, which is dangerous. In addition, there is only one cabinet door on the low-voltage distribution cabinet. When performing wiring operations on its internal components, operations can only be performed at the opened cabinet door. The operating space is relatively small, especially when operating at positions close to the inner walls on both sides of the low-voltage distribution cabinet, the operation is more troublesome. Therefore, it does not meet the existing needs, and we propose a low-voltage distribution cabinet for this purpose. Summary of the invention

[0005] The purpose of the present invention is to provide a low-voltage distribution cabinet to solve the problem raised in the above background technology that as the use time of this low-voltage distribution cabinet increases, its internal structure will gradually age. If its aging is too serious, it is possible to cause a fire due to a circuit failure, which has a certain risk. In addition, this low-voltage distribution cabinet has only one cabinet door. When performing wiring and other operations on its internal components, the operation can only be performed at the opened cabinet door. The operating space is relatively small, especially when operating at positions close to the inner walls on both sides of the low-voltage distribution cabinet, the operation is more troublesome.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-voltage power distribution cabinet, comprising a low-voltage power distribution cabinet base, the upper end surface of the low-voltage power distribution cabinet base is fixedly installed with a high-convenient low-voltage power distribution cabinet, the low-voltage power distribution cabinet comprises a cabinet body, a plurality of low-voltage power distribution cabinet components, two L-shaped cabinet doors, two cabinet door shafts and a synchronous opening and closing mechanism, the cabinet body is convex as a whole, and the plurality of low-voltage power distribution cabinet components are fixedly installed on the convex surface of the cabinet body;

[0007] The L-shaped cabinet door is L-shaped as a whole, and the two L-shaped cabinet doors are respectively located on both sides of the electrical cabinet body, and the two cabinet door rotating shafts respectively vertically penetrate the two L-shaped cabinet doors, and the synchronous opening and closing mechanism can synchronously drive the other cabinet door rotating shaft to rotate counterclockwise while driving one cabinet door rotating shaft to rotate clockwise;

[0008] A fire extinguishing alarm mechanism is fixedly installed on the upper end surface of the high-convenient low-voltage distribution cabinet, and the fire extinguishing alarm mechanism includes a fire extinguishing hood, two internal thread fixing grooves, two external thread connecting rods, multiple interlaced powdering needles, a plastic bag, a dry powder fire extinguishing agent and a synchronous transmission mechanism, the two internal thread fixing grooves are respectively located on both sides of the inner wall of the fire extinguishing hood, and the top ends of the two external thread connecting rods are respectively located inside the two internal thread fixing grooves;

[0009] The plastic bag is located below the plurality of interlaced powdering needles, the dry powder fire extinguishing agent is located inside the plastic bag, and the synchronous transmission mechanism can synchronously push all the interlaced powdering needles downward in the process of driving the two external threaded connecting rods to rotate.

[0010] Preferably, the synchronous opening and closing mechanism includes an opening and closing motor, the output shaft of the opening and closing motor is connected to the opening and closing shaft through a coupling, the outer surface of the opening and closing shaft is fixedly sleeved with a first gear, one side of the outer surface of the first gear is meshed with a second gear, and the second gear is fixedly sleeved on the lower side of the outer surface of the first cabinet door shaft from left to right.

[0011] Preferably, a third gear is meshed on the other side of the outer surface of the first gear, and a fourth gear is meshed on the third gear. The fourth gear is fixedly sleeved on the lower side of the outer surface of the second cabinet door shaft from left to right.

[0012] Preferably, the synchronous transmission mechanism includes a top outer shell of a power distribution cabinet, a stepper motor is fixedly mounted on the upper side of the interior of the fire extinguishing hood, one side of the stepper motor is provided with a smoke sensor fixedly mounted on the lower end surface of the top outer shell of the power distribution cabinet, an alarm light is provided on the lower side behind the smoke sensor, and the smoke sensor is electrically connected to the stepper motor and the alarm light at the same time.

[0013] Preferably, the output shaft of the stepper motor is connected to a transmission shaft via a coupling, a first bevel gear is provided on the lower fixed sleeve of the outer surface of the transmission shaft, a second bevel gear is meshed on both sides of the outer surface of the first bevel gear, and the axis of the second bevel gear is connected to a gear transmission shaft connected to the top outer shell of the distribution cabinet via a roller bearing.

[0014] Preferably, a square rotating shaft is fixedly provided at the middle position of the front end face of the first gear transmission rotating shaft and the middle position of the rear end face of the second gear transmission rotating shaft from left to right, and the outer side of the top end of the square rotating shaft is provided with a square slot located on the outer surface of the external threaded connecting rod, and the outer side of the square slot is provided with an internal thread groove located inside the top outer shell of the distribution cabinet and connected to the external threaded connecting rod through a threaded structure.

[0015] Preferably, the cross-sectional shape of the square rotating shaft is a square, the outer surface of the square rotating shaft fits with the inner wall of the square slot, and the square rotating shaft and the square slot are slidably connected.

[0016] Preferably, the lower end surface of the transmission shaft is fixedly connected with a lifting threaded rod, the upper side of the outer surface of the lifting threaded rod is connected with a pushing plate via a threaded structure, and the front and rear end surfaces of the pushing plate are both vertically movably penetrated by a guide rod.

[0017] Preferably, the upper end faces of all the interlaced powdering needles are fixed to the lower end face of the pushing plate, a feed port is provided at the middle position of the front and rear end faces of the interlaced powdering needles, a flow groove communicating with the inside of the feed port is provided inside the interlaced powdering needles, a circle of discharge through holes is provided on the outer surface of the bottom end of the interlaced powdering needles, and the discharge through holes are communicated with the inside of the flow groove;

[0018] A through hole located on the lower end surface of the top shell of the power distribution cabinet is provided below the interlaced powder spreading needle.

[0019] Preferably, a guide sleeve is fixedly provided on the lower sides of the front and rear end surfaces of the fire extinguishing hood, and a metal guide rod slidably connected to the guide sleeve is provided inside the guide sleeve.

[0020] The present invention ensures that when a fire occurs in a low-voltage distribution cabinet component located inside the equipment due to a circuit fault and its smoke is detected by a smoke sensor, the alarm light will automatically sound an alarm to prompt maintenance personnel to come and repair it immediately. In the process, the fire extinguishing alarm mechanism will automatically move the fire extinguishing hood to the outside of the entire equipment to isolate the equipment from the outside world, prevent air circulation, and slowly extinguish the fire source inside it. Through the above technical solution, when a fire occurs in the equipment due to a circuit fault, the equipment can be automatically extinguished and maintenance personnel can be notified to come and repair it, thereby improving the safety of the equipment.

[0021] The present invention also has the low-voltage distribution cabinet components all installed on the raised surface of the cabinet body, and the low-voltage distribution cabinet components installed on the raised surface of the cabinet body are isolated from the outside world by two L-shaped cabinet doors. When it is necessary to perform wiring and other operations on the low-voltage distribution cabinet components, the two L-shaped cabinet doors can be opened synchronously through a synchronous opening and closing mechanism to completely expose the low-voltage distribution cabinet components to the outside world. Through the above technical solution, the area of ​​the low-voltage distribution cabinet components located inside the equipment that can be exposed to the outside world is increased, so that the operator can more conveniently perform wiring and other operations, thereby improving the convenience of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 A top view of the internal structure at center A;

[0024] Figure 3 This is a front view of the internal structure of the present invention;

[0025] Figure 4 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0026] Figure 5 For the present invention Figure 3 A magnified view of the structure at C in the middle;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of the structure at D in the middle.

[0028] In the figure: 1. Base of low-voltage distribution cabinet; 2. Fire extinguishing alarm mechanism; 201. Top shell of distribution cabinet; 202. Fire extinguishing cover; 203. Smoke sensor; 204. Alarm light; 205. Stepper motor; 206. Transmission shaft; 207. First bevel gear; 208. Second bevel gear; 209. Gear transmission shaft; 210. Square shaft; 211. Internal thread groove; 212. Internal thread fixing groove; 213. External thread connecting rod; 214. Square slot; 215. Lifting thread rod ; 216, push plate; 217, guide rod; 218, interspersed powdering needle; 219, flow groove; 220, feed port; 221, discharge through hole; 222, plastic bag; 223, dry powder fire extinguishing agent; 224, through hole; 225, metal guide rod; 226, guide sleeve; 3, electric cabinet body; 4, low-voltage distribution cabinet components; 5, L-shaped cabinet door; 6, cabinet door shaft; 7, opening and closing motor; 8, opening and closing shaft; 9, first gear; 10, second gear; 11, third gear; 12, fourth gear. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0030] See also Figures 1 to 6 The present invention provides a low-voltage power distribution cabinet, comprising a low-voltage power distribution cabinet base 1, a high-convenient low-voltage power distribution cabinet is fixedly installed on the upper end surface of the low-voltage power distribution cabinet base 1, the low-voltage power distribution cabinet comprises a cabinet body 3, a plurality of low-voltage power distribution cabinet components 4, two L-shaped cabinet doors 5, two cabinet door shafts 6 and a synchronous opening and closing mechanism, the cabinet body 3 is convex as a whole, and the plurality of low-voltage power distribution cabinet components 4 are fixedly installed on the convex surface of the cabinet body 3;

[0031] The L-shaped cabinet door 5 is L-shaped as a whole, and the two L-shaped cabinet doors 5 are respectively located on both sides of the electric cabinet body 3. The two cabinet door shafts 6 vertically penetrate the two L-shaped cabinet doors 5 respectively. The synchronous opening and closing mechanism can synchronously drive one of the cabinet door shafts 6 to rotate counterclockwise while driving the other cabinet door shaft 6 to rotate clockwise.

[0032] The synchronous opening and closing mechanism of the present invention comprises an opening and closing motor 7, the output shaft of the opening and closing motor 7 is connected to an opening and closing shaft 8 through a coupling, a first gear 9 is fixedly sleeved on the outer surface of the opening and closing shaft 8, a second gear 10 is meshed on one side of the outer surface of the first gear 9, and the second gear 10 is fixedly sleeved on the lower side of the outer surface of the first cabinet door shaft 6 from left to right; the low-voltage distribution cabinet components 4 are all installed on the raised surface of the cabinet body 3, and the low-voltage distribution cabinet components 4 installed on the raised surface of the cabinet body 3 are isolated from the outside by two L-shaped cabinet doors 5. When it is necessary to perform maintenance on the low-voltage distribution cabinet components 4, When performing wiring operations, the opening and closing motor 7 is started, and the opening and closing motor 7 can drive the opening and closing shaft 8 connected thereto and the first gear 9 fixedly sleeved on the outer surface of the opening and closing shaft 8 to rotate. At this time, the first gear 9 is driven by the opening and closing motor 7 to rotate counterclockwise. When the first gear 9 rotates counterclockwise, the second gear 10 meshing therewith and the first cabinet door shaft 6 from left to right connected to the axis of the second gear 10 will rotate clockwise therewith. When this cabinet door shaft 6 rotates, it will drive the L-shaped cabinet door 5 fixed thereto to rotate clockwise with this cabinet door shaft 6 as the center.

[0033] A third gear 11 is meshed on the other side of the outer surface of the first gear 9, and the third gear 11 is meshed with a fourth gear 12. The fourth gear 12 is fixedly sleeved on the lower side of the outer surface of the second cabinet door shaft 6 from left to right; during the counterclockwise rotation of the first gear 9, the third gear 11 meshed therewith will rotate clockwise therewith, and when the third gear 11 rotates clockwise, the fourth gear 12 meshed therewith and the second cabinet door shaft 6 from left to right connected to the axis of the fourth gear 12 will rotate counterclockwise therewith, and when this cabinet door shaft 6 rotates counterclockwise, it will drive the L-shaped cabinet door 5 fixed thereto to rotate counterclockwise with this cabinet door shaft 6 as the center, and with the rotation of the two L-shaped cabinet doors 5, the low-voltage distribution cabinet component 4 isolated by the two L-shaped cabinet doors 5 will be completely exposed to the outside world, and the above technical scheme increases the area of ​​the low-voltage distribution cabinet component 4 located inside the equipment that can be exposed to the outside world, so that the operator can more conveniently perform wiring operations on it, thereby improving the convenience of the equipment.

[0034] When the wiring of the low-voltage distribution cabinet components 4 is completed, the opening and closing motor 7 drives the opening and closing shaft 8 connected thereto to rotate clockwise, so that the low-voltage distribution cabinet components 4 can be sealed again through the two L-shaped cabinet doors 5.

[0035] A fire extinguishing alarm mechanism 2 is fixedly installed on the upper end surface of the high-convenient low-voltage distribution cabinet. The fire extinguishing alarm mechanism 2 includes a fire extinguishing hood 202, two internal thread fixing grooves 212, two external thread connecting rods 213, multiple interlaced powdering needles 218, a plastic bag 222, a dry powder fire extinguishing agent 223 and a synchronous transmission mechanism. The two internal thread fixing grooves 212 are respectively located on both sides of the inner wall of the fire extinguishing hood 202, and the top ends of the two external thread connecting rods 213 are respectively located inside the two internal thread fixing grooves 212;

[0036] The plastic bag 222 is located below the multiple interlaced powdering needles 218, and the dry powder fire extinguishing agent 223 is located inside the plastic bag 222. The synchronous transmission mechanism can synchronously push all the interlaced powdering needles 218 downward in the process of driving the two external threaded connecting rods 213 to rotate.

[0037] Furthermore, the synchronous transmission mechanism provided by the present invention includes a top outer shell 201 of a distribution cabinet, a stepper motor 205 is fixedly installed on the upper side of the interior of the fire extinguishing hood 202, a smoke sensor 203 fixedly installed on the lower end surface of the top outer shell 201 of the distribution cabinet is provided on one side of the stepper motor 205, an alarm light 204 is provided on the lower side behind the smoke sensor 203, and the smoke sensor 203 is electrically connected to the stepper motor 205 and the alarm light 204 at the same time; when the low-voltage distribution cabinet component 4 located inside the equipment generates flames due to a circuit fault and its smoke is detected by the smoke sensor 203, the alarm light 204 electrically connected thereto will then sound an alarm, thereby prompting maintenance personnel to come and repair it immediately, and in this process, the stepper motor 205 which is also electrically connected to the smoke sensor 203 will then automatically start.

[0038] The output shaft of the stepper motor 205 is connected to the transmission shaft 206 through a coupling, and a first bevel gear 207 is fixedly sleeved on the lower side of the outer surface of the transmission shaft 206, and a second bevel gear 208 is meshed on both sides of the outer surface of the first bevel gear 207, and the axis of the second bevel gear 208 is connected to a gear transmission shaft 209 connected to the top shell 201 of the distribution cabinet through a roller bearing; the stepper motor 205 can drive the transmission shaft 206 connected thereto and the first bevel gear 207 fixedly sleeved on the lower side of the outer surface of the transmission shaft 206 to rotate, and when the first bevel gear 207 rotates, the two second bevel gears 208 meshing therewith will rotate together, and the rotating second bevel gear 208 can drive the gear transmission shaft 209 connected to the axis of the second bevel gear 208 to rotate.

[0039] A square shaft 210 is fixedly provided at the middle position of the front end face of the first gear transmission shaft 209 and the middle position of the rear end face of the second gear transmission shaft 209 from left to right. The outer side of the top end of the square shaft 210 is provided with a square slot 214 located on the outer surface of the external threaded connecting rod 213, and the outer side of the square slot 214 is provided with an internal thread groove 211 located inside the top shell 201 of the distribution cabinet and connected to the external threaded connecting rod 213 through a threaded structure; the cross-sectional shape of the square shaft 210 is square, the outer surface of the square shaft 210 fits with the inner wall of the square slot 214, and the square shaft 210 and the square slot 214 are slidably connected; when the gear transmission shaft 209 rotates, the square shaft 210 fixed thereto will rotate synchronously therewith, because the outer surface of the square shaft 210 is connected to the outer surface of the external threaded connecting rod 213 The inner walls of the square slot 214 fit together, and when the square shaft 210 rotates, the external threaded connecting rod 213 will rotate synchronously therewith. When the external threaded connecting rod 213 rotates, it can move inward or outward under the drive of the internal thread structure of the internal thread groove 211. At this time, the two external threaded connecting rods 213 move inward synchronously. As the external threaded connecting rod 213 moves, the top end of the external threaded connecting rod 213 will gradually leave the inside of the internal threaded fixing groove 212 located on the inner wall of the fire extinguishing hood 202. When the top ends of the two external threaded connecting rods 213 completely leave the inside of the two internal threaded fixing grooves 212, under the action of gravity, the fire extinguishing hood 202 will automatically fall downward. The fire extinguishing hood 202 that falls downward can isolate the equipment where the fire occurs from the outside world to prevent the circulation of air, so that the fire source inside it is slowly extinguished.

[0040] A guide sleeve 226 is fixedly provided on the lower side of the front and rear end surfaces of the fire extinguishing hood 202, and a metal guide rod 225 slidably connected to the guide sleeve 226 is provided inside the guide sleeve 226; the metal guide rod 225 and the guide sleeve 226 can prevent the fire extinguishing hood 202 from tilting when falling downward.

[0041] The lower end surface of the transmission shaft 206 is fixedly connected to a lifting threaded rod 215, and the upper side of the outer surface of the lifting threaded rod 215 is connected to a push plate 216 via a threaded structure, and the front and rear end surfaces of the push plate 216 are vertically penetrated by a guide rod 217; during the rotation of the transmission shaft 206, the lifting threaded rod 215 fixed thereto will rotate therewith, and since the front and rear ends of the push plate 216 connected to the lifting threaded rod 215 via a threaded structure are vertically penetrated by a guide rod 217, the push plate 216 itself cannot rotate, and when the lifting threaded rod 215 rotates, the push plate 216, which is threadedly connected to it but cannot rotate by itself, will move up and down under the drive of the threaded structure, and the push plate 216 is moved downward.

[0042] The upper end faces of all the interlaced powdering needles 218 are fixed to the lower end face of the pushing plate 216, and a feed port 220 is provided in the middle position of the front and rear end faces of the interlaced powdering needle 218, and a flow groove 219 communicating with the inside of the feed port 220 is provided inside the interlaced powdering needle 218, and a circle of discharge holes 221 are provided on the outer surface of the bottom end of the interlaced powdering needle 218, and the discharge holes 221 are communicated with the inside of the flow groove 219; as the pushing plate 216 descends, the interlaced powdering needles 218 fixed to the lower end face of the pushing plate 216 will move downward together, and the interlaced powdering needles 218 moving downward will pierce the upper end face of the plastic bag 222 and enter the inside of the dry powder fire extinguishing agent 223;

[0043] A through hole 224 is provided below the inserted powdering needle 218 and is located on the lower end surface of the top shell 201 of the distribution cabinet; when the bottom end of the inserted powdering needle 218 passes through the lower end surface of the plastic bag 222 punctured by the dry powder fire extinguishing agent 223, it will pass through the through hole 224 and move to the top of the low-voltage distribution cabinet component 4, and then the dry powder fire extinguishing agent 223 will enter the interior of the flow groove 219 from the feed port 220 located on the outer surface of the inserted powdering needle 218 and flow out to the outside through the discharge through hole 221 communicated with the interior of the flow groove 219, and the dry powder fire extinguishing agent 223 flowing out to the outside will eventually cover the low-voltage distribution cabinet component 4 where the fire occurs, so as to prevent it from re-igniting. Through the above technical solution, when the equipment catches fire due to a circuit fault, it can automatically extinguish the fire and notify the maintenance personnel to come and repair it, thereby improving the safety of the equipment.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention, and that all changes within the meaning and scope of the equivalent elements of the claims are within the scope of protection of the present invention.

Claims

1. A low-voltage power distribution cabinet, comprising a low-voltage power distribution cabinet base, characterized in that: A highly portable low-voltage distribution cabinet is fixedly mounted on the upper end surface of the low-voltage distribution cabinet base. The low-voltage distribution cabinet comprises a cabinet body, a plurality of low-voltage distribution cabinet components, two L-shaped cabinet doors, two cabinet door shafts and a synchronous opening and closing mechanism. The cabinet body is convex as a whole, and a plurality of low-voltage distribution cabinet components are fixedly mounted on the convex surface of the cabinet body. The L-shaped cabinet door is L-shaped as a whole, and the two L-shaped cabinet doors are respectively located on both sides of the electrical cabinet body, and the two cabinet door rotating shafts respectively vertically penetrate the two L-shaped cabinet doors, and the synchronous opening and closing mechanism can synchronously drive the other cabinet door rotating shaft to rotate counterclockwise while driving one cabinet door rotating shaft to rotate clockwise; A fire extinguishing alarm mechanism is fixedly installed on the upper end surface of the high-convenient low-voltage distribution cabinet, and the fire extinguishing alarm mechanism includes a fire extinguishing hood, two internal thread fixing grooves, two external thread connecting rods, multiple interlaced powdering needles, a plastic bag, a dry powder fire extinguishing agent and a synchronous transmission mechanism, the two internal thread fixing grooves are respectively located on both sides of the inner wall of the fire extinguishing hood, and the top ends of the two external thread connecting rods are respectively located inside the two internal thread fixing grooves; The plastic bag is located below the plurality of interlaced powdering needles, the dry powder fire extinguishing agent is located inside the plastic bag, and the synchronous transmission mechanism can synchronously push all the interlaced powdering needles downward in the process of driving the two external threaded connecting rods to rotate.

2. A low voltage distribution cabinet according to claim 1, characterized in that: The synchronous opening and closing mechanism includes an opening and closing motor, the output shaft of the opening and closing motor is connected to the opening and closing shaft through a coupling, the outer surface of the opening and closing shaft is fixedly sleeved with a first gear, one side of the outer surface of the first gear is meshed with a second gear, and the second gear is fixedly sleeved on the lower side of the outer surface of the first cabinet door shaft from left to right.

3. A low voltage distribution cabinet according to claim 2, characterized in that: A third gear is meshed with the other side of the outer surface of the first gear, and a fourth gear is meshed with the third gear. The fourth gear is fixedly sleeved on the lower side of the outer surface of the second cabinet door shaft from left to right.

4. A low voltage distribution cabinet according to claim 1, characterized in that: The synchronous transmission mechanism includes a top shell of a power distribution cabinet, a stepper motor is fixedly installed on the upper side of the interior of the fire extinguishing hood, a smoke sensor is fixedly installed on the lower end surface of the top shell of the power distribution cabinet on one side of the stepper motor, an alarm light is provided on the lower side behind the smoke sensor, and the smoke sensor is electrically connected to the stepper motor and the alarm light at the same time.

5. A low voltage distribution cabinet according to claim 4, characterized in that: The output shaft of the stepper motor is connected to the transmission shaft through a coupling, and a first bevel gear is provided on the lower fixed sleeve of the outer surface of the transmission shaft. A second bevel gear is meshed on both sides of the outer surface of the first bevel gear, and the axis of the second bevel gear is connected to a gear transmission shaft connected to the top outer shell of the distribution cabinet through a roller bearing.

6. A low voltage distribution cabinet according to claim 5, characterized in that: A square rotating shaft is fixedly provided at the middle position of the front end face of the first gear transmission rotating shaft and the middle position of the rear end face of the second gear transmission rotating shaft from left to right, and a square slot located on the outer surface of the external threaded connecting rod is provided on the outer side of the top end of the square rotating shaft, and an internal thread groove is provided on the outer side of the square slot, which is located inside the top outer shell of the distribution cabinet and connected to the external threaded connecting rod through a threaded structure.

7. A low voltage distribution cabinet according to claim 6, characterized in that: The cross-sectional shape of the square rotating shaft is a square, the outer surface of the square rotating shaft is fitted with the inner wall of the square slot, and the square rotating shaft is slidably connected to the square slot.

8. A low voltage distribution cabinet according to claim 5, characterized in that: The lower end surface of the transmission shaft is fixedly connected with a lifting threaded rod, and the upper side of the outer surface of the lifting threaded rod is connected with a pushing plate through a threaded structure, and the front and rear end surfaces of the pushing plate are both vertically movably penetrated by a guide rod.

9. A low voltage distribution cabinet according to claim 8, characterized in that: The upper end faces of all the interlaced powdering needles are fixed to the lower end face of the pushing plate, a feed port is provided in the middle position of the front and rear end faces of the interlaced powdering needles, a flow groove communicating with the inside of the feed port is provided inside the interlaced powdering needles, and a circle of discharge through holes is provided on the outer surface of the bottom end of the interlaced powdering needles, and the discharge through holes are communicated with the inside of the flow groove; A through hole located on the lower end surface of the top shell of the power distribution cabinet is provided below the interlaced powder spreading needle.

10. A low voltage distribution cabinet according to claim 1, characterized in that: A guide sleeve is fixedly provided on the lower sides of the front and rear end surfaces of the fire extinguishing hood, and a metal guide rod slidably connected to the guide sleeve is provided inside the guide sleeve.

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