Electrical cabinet capable of automatically powering off and extinguishing fire

Abstract

The invention relates to the technical field of electrical cabinets, and discloses an automatic power-off fire extinguishing electrical cabinet which comprises a cabinet body. The cabinet door is hinged to the side face of the cabinet body; the plurality of control switches are clamped and mounted on the inner side wall of the cabinet body through cross beams; the ventilation openings are symmetrically formed in the cabinet body; the baffles are rotationally mounted on the inner side walls of the ventilation openings correspondingly; the two guide rods are symmetrically and fixedly mounted on the inner side wall of the cabinet body; and the lifting plate is mounted on the two guide rods in a sliding manner. A locking assembly and a power-off mechanism are arranged, a reaction box is made of a heat conduction material, when the temperature in the cabinet body rises, sodium bicarbonate in the reaction box is heated to be decomposed, carbon dioxide is generated and enters and ejects a piston plate through a guide pipe, then a lifting plate is pushed to slide down, power-off protection is achieved through an ejector rod, and the subsequent fire extinguishing process is started; effective measures can be taken at the initial stage of a fire, and the fire is prevented from expanding.

Description

Technical Field

[0001] The invention relates to the technical field of electrical cabinets, and in particular to an electrical cabinet capable of automatically cutting off power and extinguishing fire. Background Art

[0002] Electrical cabinets, also known as distribution cabinets, are important equipment in power systems used to protect the normal operation of components and distribute electrical energy. Electrical cabinets are cabinets made of steel (such as hot-rolled steel plates, cold-rolled steel plates). They are mainly used to protect the normal operation of components and distribute electrical energy. They distribute electrical energy to various load parts and cut off power supply in time to protect the safety of equipment and personnel when short circuit, overload and leakage occur in the circuit.

[0003] After searching, the Chinese patent with the announcement number CN117810824A discloses an intelligent electrical cabinet with automatic power-off and fire extinguishing, which relates to the technical field of electrical cabinets; it includes a cabinet for placing electrical equipment, and also includes a detection module, a control module and a fire extinguishing component; the detection module and the electrical equipment in the cabinet are electrically connected to the control module, and the fire extinguishing component is controlled by the control module. The detection module is used to detect the environmental data in the electrical cabinet, and the environmental data at least includes temperature data and smoke concentration data; the fire extinguishing component is used to transport the fire extinguishing agent into the cabinet to achieve fire extinguishing; the control module is used to receive the environmental data, and control the opening and closing of the fire extinguishing component based on the environmental data, and control the power on and off of the electrical equipment in the cabinet; the present application has the effect of realizing real-time automatic monitoring of the fire situation, improving the efficiency and timeliness of fire extinguishing, but the above scheme still has the following shortcomings when it is actually used: The above-mentioned electrical cabinet drive motor is a key component for controlling the nozzle to spray dry powder. Its normal operation is highly dependent on power supply. However, when a fire occurs inside or around the electrical cabinet, the power line is likely to be damaged, resulting in power outage, which makes the drive motor unable to work normally. Secondly, electrical cabinets are usually designed with vents to ensure the heat dissipation needs of internal equipment during normal operation. However, this design may become a channel for the spread of fire when a fire occurs. If the vents are not closed in time, outside air will continue to flow into the electrical cabinet, providing sufficient oxygen for the fire source, thereby accelerating the spread of the fire and the combustion reaction.

[0004] Therefore, it is necessary to design an electrical cabinet with automatic power-off and fire-extinguishing function to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an electrical cabinet with automatic power-off and fire-extinguishing function.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An electrical cabinet with automatic power-off and fire-extinguishing function, comprising: Cabinet; A cabinet door, hinged to the side of the cabinet body; A plurality of control switches are mounted on the inner wall of the cabinet through crossbeam clamping; A plurality of ventilation holes are symmetrically arranged on the cabinet body; A plurality of baffles are rotatably mounted on the inner side walls of the plurality of vents; Two guide rods are symmetrically fixedly mounted on the inner wall of the cabinet; A lifting plate, slidably mounted on the two guide rods; Two dry powder tanks are symmetrically fixedly mounted on the top surface of the lifting plate; An injection mechanism is arranged on the top surface of the lifting plate, and the injection mechanism is connected to the two dry powder tanks; A spray hood, fixedly mounted on the bottom surface of the lifting plate, the spray hood being adapted to the spray mechanism; A slide groove is provided on the top surface of the cabinet; A power-off mechanism, arranged on the bottom surface of the lifting plate; Two sets of locking components are symmetrically arranged on the bottom surface of the lifting plate; A guide assembly, arranged at the bottom opening of the spray hood; A gas injection assembly, arranged between the top surface of the cabinet and the lifting plate; Two sets of sealing components are symmetrically arranged on the cabinet at positions corresponding to the ventilation openings.

[0007] As a preferred technical solution of the present invention, the power-off mechanism comprises: A guide groove is provided on the bottom surface of the lifting plate; A guide block, slidably mounted on the inner wall of the guide groove; A push rod, fixedly mounted on the bottom surface of the guide block; A support spring is fixedly installed between the guide block and the inner side wall of the guide groove.

[0008] As a preferred technical solution of the present invention, the locking assembly includes: A reaction box, fixedly mounted on one side of the bottom surface of the lifting plate; A conduit is disposed on the outer wall of the reaction box and is communicated with the reaction box; A piston plate, slidably mounted on the inner wall of the conduit; A push rod, fixedly mounted on a side of the piston plate away from the reaction box; A transmission plate is rotatably mounted on the bottom surface of the lifting plate through a bracket, and the push rod is opposite to the top end of the transmission plate; The limiting rod is fixedly mounted on the bottom of the side opposite to the transmission plate and the cabinet body.

[0009] As a preferred technical solution of the present invention, the inner side wall of the cabinet is provided with a limiting slot adapted to the limiting rod, and the interior of the reaction box is filled with sodium bicarbonate.

[0010] As a preferred technical solution of the present invention, the guide assembly includes: A plurality of rotating shafts are rotatably mounted at the bottom opening of the spray hood in a linear array distribution, and one end of the rotating shaft passes through the spray hood; A plurality of guide plates are respectively mounted on a plurality of the rotating shafts; A plurality of driven wheels are respectively fixedly mounted on one end of a plurality of rotating shafts located outside the spray hood; A synchronous belt, mounted on a plurality of the driven wheels; A plurality of torsion springs 1 are respectively mounted on a plurality of the rotating shafts, and two ends of the torsion springs 1 are respectively fixedly connected to the rotating shafts and the spray hood; A connecting rod, fixedly mounted on a side of the driven wheel; A transmission half gear, fixedly mounted on an end of the connecting rod away from the driven wheel; An intermittent rack is fixedly mounted on the inner wall of the cabinet, and the transmission half gear is meshed with the intermittent rack.

[0011] As a preferred technical solution of the present invention, the gas injection assembly comprises: A slide plate, slidably mounted on the inner wall of the slide groove; A sealing cylinder, fixedly mounted on the top surface of the slide plate; A pump blade is rotatably mounted on the inner wall of the sealing cylinder; An inert gas box is fixedly mounted on one side of the top surface of the cabinet; The nozzle is fixedly mounted on the inner top wall of the cabinet, and the outer wall of the sealing cylinder is connected with the inert gas box and the nozzle through a connecting pipe.

[0012] As a preferred technical solution of the present invention, the gas injection assembly further includes: A driving shaft is arranged on the slide plate through which the top end of the driving shaft is fixedly connected to the pump blade; A transmission gear, fixedly mounted on the bottom end of the drive shaft; A plurality of teeth are fixedly mounted on the inner wall of the slideway in a linear array, and the transmission gear is meshed with the teeth; Two guide rollers are rotatably mounted on the side edges of the top surface of the cabinet; Two connecting ropes are symmetrically fixedly installed on the outer wall of the sealing cylinder, and one end of the connecting rope away from the sealing cylinder passes around the guide roller and is fixedly connected to the top surface of the lifting plate.

[0013] As a preferred technical solution of the present invention, the sealing assembly includes: A slot is provided on the side of the cabinet body and located at the side of the vent; A plurality of rotating rods are distributed in a linear array and are rotatably mounted on the inner side wall of the slot, one end of the rotating rod passes through the slot and is fixedly connected to the end of the baffle; A plurality of adjusting wheels are respectively fixedly mounted on the ends of a plurality of the rotating rods; A transmission bar, rotatably mounted on the sides of the plurality of adjusting wheels; A plurality of one-way teeth are distributed in a ring array and fixedly mounted on the outer wall of one of the adjusting wheels at the bottom end among the plurality of adjusting wheels; A pawl is rotatably mounted on the inner side wall of the slot through a rotating rod, and the pawl is meshed with the one-way teeth; A second torsion spring is mounted on the rotating rod, and two ends of the second torsion spring are respectively fixedly connected to the rotating rod and the inner side wall of the slot; A pneumatic telescopic rod is fixedly mounted on the inner side wall of the slot, and the telescopic end of the pneumatic telescopic rod is opposite to the end of the ratchet claw.

[0014] As a preferred technical solution of the present invention, the transmission bar is rotatably mounted at a side position of the side of the regulating wheel, and the pneumatic telescopic rod is connected to the reaction box through a connecting pipe.

[0015] As a preferred technical solution of the present invention, the inert gas box is filled with inert gas.

[0016] The present invention has the following beneficial effects: 1. By setting a locking component and a power-off mechanism, the reaction box is made of heat-conducting material. When the temperature inside the cabinet rises, the sodium bicarbonate in the reaction box is decomposed by heat to produce carbon dioxide, which enters through the conduit and pushes the piston plate, thereby pushing the lifting plate down. Not only does the power-off protection come true through the push rod, but the subsequent fire-fighting process is also started, making it easy to take effective measures at the early stage of the fire to prevent the fire from spreading; 2. By setting the guide assembly and the gas injection assembly, during the downward movement of the lifting plate, the dry powder in the dry powder tank is sprayed out at multiple angles through the spray mechanism and the reciprocating guide plate, achieving all-round coverage of the interior of the cabinet, improving the use efficiency of the dry powder, ensuring the comprehensiveness of the fire extinguishing effect, and effectively curbing the spread of the fire. At the same time, through the linkage of the connecting rope, the slide plate and the pump blade, the downward movement speed of the lifting plate is adjusted, and the inert gas is sprayed into the cabinet simultaneously, which not only avoids the impact caused by the excessive downward movement of the lifting plate, but also further reduces the oxygen concentration in the cabinet by filling in the inert gas, thereby enhancing the fire extinguishing effect and creating a safer environment for subsequent rescue work; 3. By setting up the baffle and sealing components, the carbon dioxide generated by the reaction box can also trigger the extension of the pneumatic telescopic rod, thereby pushing the pawl to separate from the one-way teeth, so that the baffle rotates under the action of gravity and closes the vent, effectively cutting off the way for external air to enter the cabinet, reducing the possibility of fire re-ignition, and further consolidating the fire extinguishing results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an electrical cabinet with automatic power-off and fire-extinguishing function proposed by the present invention; Figure 2 This is a schematic diagram of the overall first-view structure of an electrical cabinet with automatic power-off and fire-extinguishing function proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a locking assembly of an electrical cabinet with automatic power-off and fire-extinguishing function proposed by the present invention; Figure 4 This is a schematic diagram of the structure of a spray hood of an electrical cabinet with automatic power-off and fire-extinguishing function proposed by the present invention; Figure 5 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A; Figure 6 A second-view structural schematic diagram of an overall electrical cabinet with automatic power-off and fire-extinguishing function proposed by the present invention; Figure 7 A schematic diagram of the back structure of an electrical cabinet with automatic power-off and fire-extinguishing function proposed by the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure at B; Fig. 9 For the present invention Figure 6 Enlarged structural diagram at C.

[0018] In the figure: 1, cabinet; 2, cabinet door; 3, control switch; 4, vent; 5, guide rod; 6, lifting plate; 7, dry powder tank; 8, spray mechanism; 9, spray cover; 101, reaction box; 102, guide tube; 103, piston plate; 104, push rod; 105, transmission plate; 106, limit rod; 111, rotating shaft; 112, guide plate; 113, driven wheel; 114, synchronous belt; 115, torsion spring 1; 116, connecting rod; 117, transmission half gear; 118, intermittent rack; 12, slideway; 131, Slide plate; 132, sealing cylinder; 133, pump blade; 134, inert gas box; 135, nozzle; 136, drive shaft; 137, transmission gear; 138, teeth; 139, guide roller; 1310, connecting rope; 141, slot; 142, rotating rod; 143, adjusting wheel; 144, transmission bar; 145, one-way teeth; 146, ratchet; 147, torsion spring 2; 148, pneumatic telescopic rod; 15, baffle; 161, guide groove; 162, guide block; 163, push rod; 164, support spring. DETAILED DESCRIPTION

[0019] 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.

[0020] Reference Figure 1-9, an electrical cabinet with automatic power-off and fire-extinguishing, comprising a cabinet body 1; a cabinet door 2, hinged on the side of the cabinet body 1; a plurality of control switches 3, mounted on the inner wall of the cabinet body 1 through a crossbeam clamping; a plurality of vents 4, symmetrically opened on the cabinet body 1; a plurality of baffles 15, rotatably mounted on the inner walls of the plurality of vents 4; two guide rods 5, symmetrically fixedly mounted on the inner wall of the cabinet body 1; a lifting plate 6, slidably mounted on the two guide rods 5; two dry powder tanks 7, symmetrically fixedly mounted on the top surface of the lifting plate 6; an injection mechanism 8, arranged on the top surface of the lifting plate 6, and the injection mechanism 8 is connected to the two dry powder tanks 7; an injection cover 9, fixedly mounted on the bottom surface of the lifting plate 6, and the injection cover 9 is adapted to the injection mechanism 8; a slide groove 12, opened on the top surface of the cabinet body 1; a power-off mechanism, arranged on the bottom surface of the lifting plate 6; two sets of locking components, symmetrically arranged on the lifting plate 6; a guide component is arranged at the bottom opening of the spray hood 9; an injection component is arranged between the top surface of the cabinet 1 and the lifting plate 6; two sets of sealing components are symmetrically arranged at positions corresponding to the vents 4 on the cabinet 1; the control switch 3 in the cabinet 1 can control the entire electrical system, and the vents 4 on the side of the cabinet 1 can connect the cabinet 1 with the outside to dissipate heat. When a fire occurs, the dry powder in the dry powder tank 7 can be sprayed along the spray hood 9 through the spray mechanism 8, and the power-off mechanism can power off the cabinet 1, the locking component can release the limit on the lifting plate 6 so that the lifting plate 6 can slide downward, the guide component can change the spraying angle of the dry powder so as to cover the cabinet 1 in all directions, the injection component can inject inert gas into the cabinet 1, and the sealing component can seal the vents 4 to achieve rapid control of the fire.

[0021] Reference Figure 6 , Fig. 9 The power-off mechanism includes: a guide groove 161, which is provided on the bottom surface of the lifting plate 6; a guide block 162, which is slidably mounted on the inner side wall of the guide groove 161; a push rod 163, which is fixedly mounted on the bottom surface of the guide block 162; a support spring 164, which is fixedly mounted between the guide block 162 and the inner side wall of the guide groove 161; when the lifting plate 6 initially slides, the push rod 163 on its bottom surface can press the main control switch 3, so that the main control switch 3 is closed to achieve power off, and as the lifting plate 6 continues to move downward, the push rod 163 can slide in the guide groove 161 through the guide block 162 under the action of the main control switch 3, thereby offsetting the main control switch 3 so that the lifting plate 6 can continue to slide.

[0022] Reference Figure 2 , Figure 3The locking assembly includes: a reaction box 101, which is fixedly mounted on one side of the bottom surface of the lifting plate 6, and the interior of the reaction box 101 is filled with sodium bicarbonate; a conduit 102, which is arranged on the outer wall of the reaction box 101, and the conduit 102 is connected to the reaction box 101; a piston plate 103, which is slidably mounted on the inner wall of the conduit 102; a push rod 104, which is fixedly mounted on the side of the piston plate 103 away from the reaction box 101; a transmission plate 105, which is rotatably mounted on the bottom surface of the lifting plate 6 through a bracket, and the push rod 104 is opposite to the top of the transmission plate 105; a limit rod 106, which is fixedly mounted on the bottom of the side opposite to the cabinet 1 of the transmission plate 105, and a limit slot adapted to the limit rod 106 is provided on the inner wall of the cabinet 1; when a fire occurs, the temperature in the cabinet 1 will rise, and the reaction box 101 on the bottom of the lifting plate 6 It is made of heat-conducting material, so when the temperature in the cabinet 1 rises, the temperature in the reaction box 101 will also rise, and the sodium bicarbonate in the reaction box 101 can be decomposed when heated. According to the chemical reaction equation 2NaHCO3=△Na2CO3+H2O+CO2↑, it can be known that when sodium bicarbonate is decomposed by heat, carbon dioxide can be generated, and the generated carbon dioxide can enter the conduit 102 and can push the piston plate 103 under the action of air pressure, so that the piston plate 103 drives the push rod 104 to slide, and then the transmission plate 105 can be pressed to make the transmission plate 105 rotate. When the transmission plate 105 rotates, the limit rod 106 at its bottom end can move out of the limit slot on the inner wall of the cabinet 1, so that the lifting plate 6 can release the limit and slide downward along the guide rod 5 under the action of gravity.

[0023] Reference Figure 2 , Figure 4The guide assembly includes: a plurality of rotating shafts 111, which are rotatably mounted at the bottom opening of the spray hood 9 in a linear array, and one end of the rotating shaft 111 passes through the spray hood 9; a plurality of guide plates 112, which are respectively mounted on the plurality of rotating shafts 111; a plurality of driven wheels 113, which are respectively fixedly mounted on one end of the plurality of rotating shafts 111 located outside the spray hood 9; a synchronous belt 114, which is mounted on the plurality of driven wheels 113; a plurality of torsion springs 115, which are respectively mounted on the plurality of rotating shafts 111, and the two ends of the torsion springs 115 are respectively fixedly connected to the rotating shaft 111 and the spray hood 9; a connecting rod 116, which is fixedly mounted on the side of the driven wheel 113; a transmission half gear 117, which is fixedly mounted on the far side of the connecting rod 116 One end of the driven wheel 113; the intermittent rack 118 is fixedly mounted on the inner wall of the cabinet 1, and the transmission half gear 117 is meshed with the intermittent rack 118; as the lifting plate 6 moves downward, the transmission half gear 117 can rotate under the action of the intermittent rack 118, and under the action of the torsion spring 115, the transmission half gear 117 moves to a point where it is not meshed with the teeth on the intermittent rack 118 and can be reversed and reset, and under the action of the synchronous belt 114 and the driven wheel 113, several rotating shafts 111 and the guide plate 112 can rotate synchronously, so when the lifting plate 6 moves, it can drive the rotating shaft 111 and the guide plate 112 to reciprocate, so that the dry powder sprayed from the spray hood 9 can be sprayed at multiple angles.

[0024] Reference Figure 1 , Figure 5 , Figure 6The gas injection assembly includes: a slide plate 131, which is slidably mounted on the inner wall of the slide groove 12; a sealing cylinder 132, which is fixedly mounted on the top surface of the slide plate 131; a pump blade 133, which is rotatably mounted on the inner wall of the sealing cylinder 132; an inert gas box 134, which is fixedly mounted on one side of the top surface of the cabinet 1, and the inert gas box 134 is filled with inert gas; a nozzle 135, which is fixedly mounted on the inner top wall of the cabinet 1, and the outer wall of the sealing cylinder 132 is connected to the inert gas box 134 and the nozzle 135 through a connecting pipe. The gas injection assembly also includes: a drive shaft 136, which is arranged on the slide plate 131, and the top of the drive shaft 136 is fixedly connected to the pump blade 133; a transmission gear 137, which is fixedly mounted on the bottom end of the drive shaft 136; a plurality of teeth 138, which are distributed in a linear array and fixedly mounted on the inner wall of the slide groove 12, and the transmission gear 137 is meshed with the teeth 138; two guide rollers 139, which are rotatably mounted on the cabinet At the side position of the top surface of the body 1; two connecting ropes 1310 are symmetrically fixedly installed on the outer wall of the sealing cylinder 132, and the end of the connecting rope 1310 away from the sealing cylinder 132 passes around the guide roller 139 and is fixedly connected to the top surface of the lifting plate 6; as the lifting plate 6 continues to move downward, it can drive the slide plate 131 to slide in the slide groove 12 through the connecting rope 1310, and the slide plate 131 and the sealing cylinder 132 have a certain weight, so it can play a certain deceleration effect on the downward sliding of the lifting plate 6 to prevent the lifting plate 6 from moving too fast. As the slide plate 131 slides, the transmission gear 137 engages with the teeth 138, so when the slide plate 131 slides, the transmission gear 137 can rotate, and can drive the pump blade 133 to rotate through the drive shaft 136. When the pump blade 133 rotates, the inert gas in the inert gas box 134 can be guided to the nozzle 135 and sprayed into the cabinet 1.

[0025] Reference Figure 7 , Figure 8The sealing assembly includes: a slot 141, which is opened on the side of the cabinet 1 and is located at the side position of the vent 4; a plurality of rotating rods 142, which are distributed in a linear array and are rotatably mounted on the inner wall of the slot 141, and one end of the rotating rod 142 passes through the slot 141 and is fixedly connected to the end of the baffle 15; a plurality of adjusting wheels 143, which are respectively fixedly mounted on the ends of the plurality of rotating rods 142; a transmission bar 144, which is rotatably mounted on the sides of the plurality of adjusting wheels 143, and the transmission bar 144 is rotatably mounted on the side position of the side of the adjusting wheel 143; a plurality of one-way teeth 145, which are distributed in an annular array and are fixedly mounted on the outer wall of an adjusting wheel 143 at the bottom end of the plurality of adjusting wheels 143; a pawl 146, which is rotatably mounted on the inner wall of the slot 141 through the rotating rod, and the pawl 146 is meshed with the one-way teeth 145; a second torsion spring 147, which is sleeved on the rotating rod, and the two ends of the second torsion spring 147 are respectively connected to the rotating rod and The inner wall of the slot 141 is fixedly connected; the pneumatic telescopic rod 148 is fixedly installed on the inner wall of the slot 141, and the telescopic end of the pneumatic telescopic rod 148 is opposite to the end of the pawl 146, and the pneumatic telescopic rod 148 is connected to the reaction box 101 through a connecting pipe; the carbon dioxide generated in the reaction box 101 can also enter the pneumatic telescopic rod 148 through the connecting pipe and lift the telescopic end of the pneumatic telescopic rod 148, so that the pneumatic telescopic rod 148 is extended and pushes the pawl 146, so that the pawl 146 is separated from the one-way tooth 145, and the limit of the adjusting wheel 143 can be released. At this time, under the action of the gravity of the baffle 15, the baffle 15 can be rotated in the direction close to the vent 4. When the baffle 15 rotates, it can drive several adjusting wheels 143 to rotate synchronously through the rotating rod 142 and the transmission bar 144, and finally the vent 4 can be covered to ensure that the vent 4 is sealed.

[0026] The specific working principle of the present invention is as follows: In the initial state, the main control switch 3 in the cabinet 1 is located directly above the top rod 163, and the other control switches 3 are located in the cabinet 1 for normal use, and the vents 4 on the side of the cabinet 1 allow the cabinet 1 to be connected to the outside for heat dissipation. When a fire occurs, the temperature in the cabinet 1 will rise. The reaction box 101 on the bottom of the lifting plate 6 is made of heat-conducting material. Therefore, when the temperature in the cabinet 1 rises, the temperature in the reaction box 101 will rise, and the sodium bicarbonate in the reaction box 101 can be decomposed when heated. According to the chemical reaction equation 2NaHC O3=△Na2CO3+H2O+CO2↑ It can be seen that when sodium bicarbonate is heated and decomposed, carbon dioxide can be generated, and the generated carbon dioxide can enter the conduit 102 and can push the piston plate 103 under the action of air pressure, so that the piston plate 103 drives the push rod 104 to slide, and then the transmission plate 105 can be pressed to make the transmission plate 105 rotate. When the transmission plate 105 rotates, the limit rod 106 at its bottom end can move out of the limit slot of the inner wall of the cabinet 1, so that the lifting plate 6 can release the limit and slide downward along the guide rod 5 under the action of gravity; When the lifting plate 6 initially slides, the top rod 163 on its bottom surface can press the main control switch 3, so that the main control switch 3 is closed to cut off the power. As the lifting plate 6 continues to move downward, the top rod 163 can slide in the guide groove 161 through the guide block 162 under the action of the main control switch 3, thereby staggering the main control switch 3 so that the lifting plate 6 can continue to slide. During the downward sliding of the lifting plate 6, the dry powder in the dry powder tank 7 can be sprayed out along the spray cover 9 through the spray mechanism 8. The working principle and connection method of the spray mechanism 8 are existing mature technologies and will not be described in detail here. As the lifting plate 6 moves downward, the top rod 163 can slide in the guide groove 161 through the guide block 162 under the action of the main control switch 3, thereby staggering the main control switch 3 so that the lifting plate 6 can continue to slide. The transmission half gear 117 can rotate under the action of the intermittent rack 118, and can be reversed and reset when the transmission half gear 117 moves to a point where it is not meshed with the teeth on the intermittent rack 118 under the action of the torsion spring 115, and a plurality of rotating shafts 111 and guide plates 112 can rotate synchronously under the action of the synchronous belt 114 and the driven wheel 113, so that when the lifting plate 6 moves, the rotating shaft 111 and the guide plate 112 can be driven to reciprocate, so that the dry powder sprayed from the spray hood 9 can be sprayed at multiple angles, ensuring that the cabinet 1 can be covered in all directions, thereby improving the efficiency of fire extinguishing; As the lifting plate 6 continues to move downward, it can drive the slide plate 131 to slide in the slide groove 12 through the connecting rope 1310, and the slide plate 131 and the sealing cylinder 132 have a certain weight, so they can play a certain deceleration effect on the downward sliding of the lifting plate 6 to prevent the lifting plate 6 from moving too fast. As the slide plate 131 slides, the transmission gear 137 meshes with the teeth 138, so that when the slide plate 131 slides, the transmission gear 137 can rotate, and can drive the pump blade 133 to rotate through the driving shaft 136. When the pump blade 133 rotates, the inert gas in the inert gas box 134 can be guided to the nozzle 135 and sprayed into the cabinet 1, so that the cabinet 1 is filled with inert gas, which further plays a role in fire extinguishing; The carbon dioxide generated in the reaction box 101 can also enter the pneumatic telescopic rod 148 through the connecting pipe and lift the telescopic end of the pneumatic telescopic rod 148, so that the pneumatic telescopic rod 148 extends and pushes the pawl 146, so that the pawl 146 is separated from the one-way tooth 145, and the limit of the adjusting wheel 143 can be released. At this time, under the action of the gravity of the baffle 15, the baffle 15 can rotate toward the direction close to the vent 4. When the baffle 15 rotates, it can drive several adjusting wheels 143 to rotate synchronously through the rotating rod 142 and the transmission bar 144, and finally the vent 4 can be covered, ensuring that the vent 4 is sealed, reducing the air entering the cabinet 1, and further controlling the fire in the cabinet 1.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electrical cabinet with automatic power-off and fire-extinguishing function, characterized in that: include: Cabinet (1); A cabinet door (2) hinged on a side of the cabinet body (1); A plurality of control switches (3) are mounted on the inner wall of the cabinet (1) by means of crossbeam clamping; A plurality of ventilation openings (4) are symmetrically arranged on the cabinet (1); A plurality of baffles (15) are rotatably mounted on the inner side walls of the plurality of vents (4); Two guide rods (5) are symmetrically fixedly mounted on the inner wall of the cabinet (1); A lifting plate (6) is slidably mounted on the two guide rods (5); Two dry powder tanks (7) are symmetrically fixedly mounted on the top surface of the lifting plate (6); An injection mechanism (8) is arranged on the top surface of the lifting plate (6), and the injection mechanism (8) is connected to the two dry powder tanks (7); A spray hood (9) is fixedly mounted on the bottom surface of the lifting plate (6), and the spray hood (9) is adapted to the spray mechanism (8); A slide groove (12) is provided on the top surface of the cabinet (1); A power-off mechanism, arranged on the bottom surface of the lifting plate (6); Two sets of locking components are symmetrically arranged on the bottom surface of the lifting plate (6); A guide assembly, arranged at the bottom opening of the spray hood (9); A gas injection assembly, arranged between the top surface of the cabinet (1) and the lifting plate (6); Two sets of sealing components are symmetrically arranged at positions on the cabinet (1) corresponding to the ventilation openings (4).

2. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 1, characterized in that: The power-off mechanism comprises: A guide groove (161) is provided on the bottom surface of the lifting plate (6); A guide block (162) slidably mounted on the inner wall of the guide groove (161); A push rod (163) fixedly mounted on the bottom surface of the guide block (162); A support spring (164) is fixedly mounted between the guide block (162) and the inner side wall of the guide groove (161).

3. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 2, characterized in that: The locking assembly comprises: A reaction box (101) is fixedly mounted on one side of the bottom surface of the lifting plate (6); A conduit (102) is arranged on the outer wall of the reaction box (101), and the conduit (102) is in communication with the reaction box (101); A piston plate (103) slidably mounted on the inner wall of the conduit (102); A push rod (104) fixedly mounted on a side of the piston plate (103) away from the reaction box (101); A transmission plate (105) is rotatably mounted on the bottom surface of the lifting plate (6) via a bracket, and the push rod (104) is opposite to the top end of the transmission plate (105); The limiting rod (106) is fixedly mounted on the bottom of a side of the transmission plate (105) opposite to the cabinet (1).

4. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 3, characterized in that: The inner side wall of the cabinet (1) is provided with a limiting slot adapted to the limiting rod (106), and the interior of the reaction box (101) is filled with sodium bicarbonate.

5. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 4, characterized in that: The guide assembly comprises: A plurality of rotating shafts (111) are rotatably mounted at the bottom opening of the spray hood (9) in a linear array distribution, and one end of the rotating shaft (111) passes through the spray hood (9); A plurality of guide plates (112) are respectively mounted on the plurality of rotating shafts (111); A plurality of driven wheels (113) are respectively fixedly mounted on one end of a plurality of rotating shafts (111) located outside the spray hood (9); A synchronous belt (114) mounted on a plurality of the driven wheels (113); A plurality of torsion springs (115) are respectively mounted on a plurality of the rotating shafts (111), and two ends of the torsion springs (115) are respectively fixedly connected to the rotating shafts (111) and the spray hood (9); A connecting rod (116) fixedly mounted on a side of the driven wheel (113); A transmission half gear (117) fixedly mounted on an end of the connecting rod (116) away from the driven wheel (113); An intermittent rack (118) is fixedly mounted on the inner wall of the cabinet (1), and the transmission half gear (117) is meshed with the intermittent rack (118).

6. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 5, characterized in that: The gas injection assembly comprises: A slide plate (131) slidably mounted on the inner wall of the slide groove (12); A sealing cylinder (132) fixedly mounted on the top surface of the slide plate (131); A pump blade (133) rotatably mounted on the inner wall of the sealing cylinder (132); An inert gas box (134) is fixedly mounted on one side of the top surface of the cabinet (1); The nozzle (135) is fixedly mounted on the inner top wall of the cabinet (1), and the outer wall of the sealing cylinder (132) is connected to the inert gas box (134) and the nozzle (135) through a connecting pipe.

7. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 6, characterized in that: The gas injection assembly also includes: A drive shaft (136) is disposed on the slide plate (131) through which the top end of the drive shaft (136) is fixedly connected to the pump blade (133); A transmission gear (137) fixedly mounted on the bottom end of the drive shaft (136); A plurality of teeth (138) are distributed in a linear array and fixedly mounted on the inner wall of the slide groove (12), and the transmission gear (137) is meshed with the teeth (138); Two guide rollers (139) are rotatably mounted on the side edges of the top surface of the cabinet (1); Two connecting ropes (1310) are symmetrically fixedly mounted on the outer wall of the sealing cylinder (132), and one end of the connecting rope (1310) away from the sealing cylinder (132) passes around a guide roller (139) and is fixedly connected to the top surface of the lifting plate (6).

8. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 7, characterized in that: The sealing assembly comprises: A slot (141) is formed on the side of the cabinet (1) and is located at a side edge of the ventilation opening (4); A plurality of rotating rods (142) are distributed in a linear array and are rotatably mounted on the inner side wall of the slot (141); one end of the rotating rod (142) passes through the slot (141) and is fixedly connected to the end of the baffle (15); A plurality of adjusting wheels (143) are respectively fixedly mounted on the ends of a plurality of the rotating rods (142); A transmission bar (144) rotatably mounted on the sides of the plurality of adjusting wheels (143); A plurality of one-way teeth (145) are distributed in a ring array and fixedly mounted on the outer wall of a bottom end of the plurality of adjusting wheels (143); A ratchet pawl (146) is rotatably mounted on the inner side wall of the slot (141) via a rotating rod, and the ratchet pawl (146) is meshed with the one-way tooth (145); A second torsion spring (147) is mounted on the rotating rod, and two ends of the second torsion spring (147) are respectively fixedly connected to the rotating rod and the inner side wall of the slot (141); The pneumatic telescopic rod (148) is fixedly mounted on the inner side wall of the slot (141), and the telescopic end of the pneumatic telescopic rod (148) is opposite to the end of the ratchet (146).

9. The electrical cabinet with automatic power-off and fire-extinguishing function according to claim 8, characterized in that: The transmission bar (144) is rotatably mounted on a side edge of the regulating wheel (143), and the pneumatic telescopic rod (148) is connected to the reaction box (101) via a connecting pipe.

10. An electrical cabinet with automatic power-off and fire-extinguishing function according to claim 9, characterized in that: The inert gas box (134) is filled with inert gas.

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