Intelligent power grid high-voltage outgoing line cabinet with high safety and method

Abstract

The invention relates to the technical field of outgoing line cabinets, and particularly discloses a high-safety intelligent power grid high-voltage outgoing line cabinet which comprises a cabinet body, a cabinet door is hinged to the front side of the cabinet body, a gas tank is installed at the rear end of the cabinet body, the gas tank is filled with gas used for extinguishing fire, and a circulating pipe is inserted into the front end of the gas tank. The intelligent power grid high-voltage outgoing line cabinet further comprises a preheating assembly which is arranged in the cabinet body and used for preheating high-pressure gas, the situation that the high-pressure gas is low in temperature, and consequently the spraying speed of the fire extinguishing gas is affected is avoided, and the spraying speed of the fire extinguishing gas is influenced. The preheating assembly comprises a sleeve cavity sliding on the outer side of the circulating pipe, through cooperation of the structures, fire extinguishing high-pressure gas can be heated, pressure reduction, caused by low temperature, in the gas tank is reduced, the fire extinguishing gas spraying speed and concentration uniformity are improved, and therefore the fire extinguishing speed is increased, and the safety of the outgoing line cabinet is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of outlet cabinets, and in particular to a smart grid high-voltage outlet cabinet and method with high safety. Background Art

[0002] Smart grid is a new type of power network that deeply integrates traditional power grid with modern information technology, communication technology, and automation control technology. High-voltage distribution cabinets are key equipment in the high-voltage distribution system of smart grids, and their reliability directly affects the security of the power grid.

[0003] During the use of the distribution cabinet, after long-term operation of the internal lines of the distribution cabinet, the insulation layer may be damaged due to aging, wear or environmental erosion, resulting in a decrease in insulation performance. When the insulation fails, the current may flow through an abnormal path, causing local overheating or even arc discharge, and then igniting surrounding combustibles. In addition, if the power distributed by the distribution cabinet exceeds its designed capacity, or a short circuit fault occurs in the line, this heat may cause the insulation layer of the wire to quickly carbonize and burn, and even cause an arc fire, thereby affecting the safe use of the smart grid distribution cabinet. In the existing technology, high-pressure gas injection can be used to extinguish the fire inside the distribution cabinet to ensure the safety of the high-voltage distribution cabinet during use.

[0004] For example, the "distribution cabinet with automatic fire extinguishing function" with publication number "CN106711770A" uses a needle to puncture the aluminum foil box to allow aluminum sulfate to flow out and mix with sodium bicarbonate to quickly produce carbon dioxide that is sprayed out through the gas channel and nozzle, thereby realizing the function of automatic fire extinguishing. The existing technology also uses IG541 gas cylinders to store high-pressure nitrogen, argon and carbon dioxide for fire extinguishing.

[0005] However, in the winter in Northeast my country, the weather is cold. Although IG541 can still remain in gaseous state at sub-zero temperatures, the low temperature may cause the pressure in the pipeline network to drop, affecting the spraying speed and concentration uniformity, thereby affecting the speed of fire extinguishing, and then affecting the fire extinguishing effect and the safety of the high-voltage distribution cabinet. Summary of the Invention

[0006] The purpose of the present invention is to provide a highly safe smart grid high-voltage outlet cabinet and method, which can heat the fire-extinguishing high-pressure gas, reduce the pressure drop in the gas tank caused by low temperature, and improve the spraying speed and concentration uniformity of the fire-extinguishing gas, thereby increasing the speed of fire extinguishing and improving the safety of the outlet cabinet, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a highly safe smart grid high-voltage outlet cabinet, comprising a cabinet body, a cabinet door hingedly connected to the front side of the cabinet body, a gas tank mounted on the rear end of the cabinet body, the interior of the gas tank being filled with fire-extinguishing gas, a circulation pipe plugged into the front end of the gas tank, the circulation pipe extending into the interior of the cabinet body and plugged into a spray pipe, the spray pipe being used to spray the fire-extinguishing gas into the interior of the cabinet body, and the smart grid high-voltage outlet cabinet further comprising: A preheating assembly is arranged inside the cabinet. The preheating assembly is used to preheat the high-pressure gas to prevent the low temperature of the high-pressure gas from affecting the speed of the fire-extinguishing gas injection. The preheating assembly includes a sleeve cavity sliding on the outside of the circulation pipe. A section of copper pipe is fixed to the position of the circulation pipe near the sleeve cavity. Bellows are fixedly connected on both sides of the bottom of the sleeve cavity. The bottoms of the two bellows are fixedly connected to a surrounding pipe. The preheating assembly also includes a heat exchange tube fixedly connected to the inside of the circulation pipe. The top of the heat exchange tube is fixedly connected to a conduit. A jacking assembly is arranged at the conduit away from the heat exchange tube. The inside of the heat exchange tube is filled with gas that is easy to expand due to temperature changes. When the temperature is high, the jacking assembly causes the sleeve cavity to move away from the copper tube.

[0008] Preferably, the lifting assembly comprises: The sleeve is fixedly inserted into the part of the end of the catheter away from the heat exchange tube that passes through the circulation tube. A first piston plate is movable inside the sleeve. A push rod is fixedly connected to the top of the first piston plate. The top of the push rod is fixed to the bottom of the sleeve cavity.

[0009] Preferably, the bottom of the sleeve cavity is fixedly connected with a thermal insulation sleeve, the surrounding tube is made of copper material, and the bottom of the surrounding tube extends into the bottom position of the cabinet body.

[0010] Preferably, the diameter of the heat exchange tube is larger than the diameter of the sleeve.

[0011] Preferably, a long plate is fixedly connected between the circulation pipe and the surrounding pipe, a motor is fixedly connected to the top of the long plate, the output shaft of the motor is fixedly connected to the driving gear, and flow components are configured on the right part of the surrounding pipe and the circulation pipe near the driving gear.

[0012] Preferably, the flow component at the circulation pipe includes a passive gear rotatably connected to the outside of the circulation pipe, and the flow component at the circulation pipe also includes a rotating frame rotatably connected to the outside of the circulation pipe, the middle part of the rotating frame is fixedly connected to a small shaft, the bottom of the small shaft is fixedly connected to a blade, the outer side of the rotating frame and the inner side of the passive gear are fixedly connected to magnetic blocks, and the structure of the flow component at the circulation pipe is consistent with that of the flow component at the surrounding pipe.

[0013] Preferably, ventilation holes are provided at both ends of the top and bottom of the cabinet, a cover is fixedly connected to the cabinet near the ventilation holes, a round rod is fixedly connected to the inner side of the cover, a closing plate is rotatably connected to the outer side of the round rod, a torsion spring is fixedly connected between the closing plate and the round rod, an electric telescopic rod is fixedly installed on the inner side of the cabinet near the closing plate, and the output shaft end of the electric telescopic rod is close to the closing plate.

[0014] Preferably, the outer rotation of the ejection pipe is connected with a plurality of rotating shafts, a rotating frame is fixed on the outer side of the rotating shaft, a nozzle is fixedly installed inside the rotating frame, a hose is fixedly connected between the nozzle and the ejection pipe, the end of the rotating shaft is fixedly connected with a third gear, and a swing assembly is arranged at the upper closing plate, the swing assembly includes a frame fixedly connected to the top of the inner side of the cabinet, a bellows is fixed inside the frame, the top of the bellows is fixedly connected to a lower pressure frame, the top of the lower pressure frame extends into the interior of the cover, the swing assembly also includes a main cylinder fixedly connected to the inner side of the cabinet, the main cylinder A second piston plate is movable on the inner side, and a lifting frame is fixed to the bottom of the second piston plate. The swing assembly also includes a slip ring slidably connected to the outside of the ejection pipe. A fixed ring is fixedly connected to the outside of the ejection pipe above the slip ring. A second spring is fixedly connected between the fixed ring and the slip ring. A baffle is fixedly connected to the front side of the slip ring. An elastic sheet is fixed in a linear array on the side of the lifting frame close to the baffle. A connecting pipe is fixedly inserted between the main cylinder and the bellows bag. A rack is fixed to the bottom of the elastic sheet. Teeth are provided on the rack near the third gear, and the teeth on the rack are engaged with the third gear.

[0015] Preferably, a through groove is provided inside the connecting tube, an elastic bag is fixed on the outer wall of the connecting tube outside the through groove, a blocking piece is fixedly connected to the inside of the connecting tube, and a small hole is provided inside the blocking piece.

[0016] A highly safe fire extinguishing method for a smart grid high-voltage outlet cabinet, characterized in that the method is applicable to the smart grid high-voltage outlet cabinet according to any one of claims 1 to 9, and comprises the following steps: S1, heating, the medium inside the sleeve cavity is heated by fire extinguishing gas; S2. Fire extinguishing: the fire extinguishing gas enters the discharge pipe from the circulation pipe and is discharged to extinguish the fire.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the function of the preheating component, the medium inside the sleeve cavity is heated by the fire extinguishing high-pressure gas, reducing the pressure drop in the gas tank caused by low temperature, improving the spraying speed and concentration uniformity of the fire extinguishing gas, thereby increasing the speed of fire extinguishing and improving the safety of the outlet cabinet; 2. Under the action of the flow assembly, the fire extinguishing gas in the circulation pipe can circulate, which is conducive to uniform gas temperature inside the gas tank and improves the heating effect of the fire extinguishing gas. At the same time, the heating medium flows around the pipe, making the temperature of the heating medium around the pipe and inside the sleeve cavity uniform; 3. When the output shaft of the electric telescopic rod contracts, the closing plate closes the vent under the elastic force of the torsion spring, ensuring the sealing of the cabinet interior, thereby ensuring the concentration of the fire extinguishing gas inside the cabinet and improving the fire extinguishing effect; 4. The slip ring moves the rack downward. Since the rack is engaged with the third gear, multiple third gears can rotate with the rotating shaft, nozzle and rotating frame, so that the ejected fire extinguishing gas is evenly sprayed into the interior of the cabinet, reducing the blind area covered by the fire extinguishing gas and further improving the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is an overall structural view of the present invention; Figure 2 This is a schematic diagram of the overall structure of the cabinet door of the present invention when it is open; Figure 3 This is a schematic diagram of a half-section structure of the cabinet of the present invention; Figure 4 It is a partial structural schematic diagram of the preheating assembly of the present invention; Figure 5 It is a schematic diagram of the partial structure of the circulation pipe of the present invention; Figure 6 It is a schematic diagram of a half-section structure of the mantle cavity of the present invention; Figure 7 For the present invention Figure 6 A magnified view of point A; Figure 8 It is a schematic side cross-sectional structure diagram of the mantle cavity of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point B; Figure 10 Schematic diagram of the cross-sectional structure of the closing plate of the present invention; Figure 11 It is a rear structural schematic diagram of the swing assembly of the present invention; Figure 12 It is a schematic diagram of the half-section structure of the main cylinder of the present invention; Figure 13 is a schematic diagram of a half-section structure of the elastic bladder of the present invention; Figure 14 This is a rear structural schematic diagram of the third gear of the present invention.

[0020] Description of reference numerals: 1. Cabinet body; 2. Cabinet door; 3. Gas tank; 4. Circulation pipe; 5. Ejection pipe; 6. Preheating assembly; 61. Cavity; 62. Bellows; 63. Heat exchange tube; 64. Conduit; 65. Surrounding pipe; 7. Lifting assembly; 71. Sleeve; 72. First piston plate; 73. Push rod; 8. Flow assembly; 81. Passive gear; 82. Rotating frame; 83. Small shaft; 84. Blade; 85. Magnetic block; 9. Swing assembly; 91. Frame; 92. Bellows; 93. Down-press frame; 94. Main cylinder; 95. Second piston plate; 96. Lift Frame; 97, slip ring; 98, fixed ring; 99, second spring; 910, baffle; 911, elastic sheet; 912, connecting pipe; 913, through groove; 914, elastic bag; 915, blocking sheet; 10, copper tube; 11, insulation cover; 12, long board; 13, motor; 14, driving gear; 15, vent; 16, cover; 17, round rod; 18, torsion spring; 19, electric telescopic rod; 20, rotating frame; 21, nozzle; 22, hose; 23, third gear; 24, closing plate; 25, rotating shaft; 26, rack. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 10 The present invention provides a technical solution: a high-safety smart grid high-voltage outlet cabinet, comprising a cabinet body 1, a cabinet door 2 hingedly connected to the front side of the cabinet body 1, a sealing gasket fixed to the side of the cabinet body 1 close to the cabinet door 2, and when the cabinet door 2 is closed, the sealing performance between the cabinet body 1 and the cabinet door 2 is guaranteed, a gas tank 3 is installed at the rear end of the cabinet body 1, and a sealing layer is provided on the outer side of the gas tank 3 to keep the gas tank 3 warm, the interior of the gas tank 3 is filled with high-pressure gas for fire extinguishing, and the gas adopts IG541, a circulation pipe 4 is plugged into the front end of the gas tank 3, both ends of the circulation pipe 4 are plugged into the gas tank 3, the circulation pipe 4 extends into the interior of the cabinet body 1 and is plugged into an ejection pipe 5, an electromagnetic valve is installed on the ejection pipe 5 near the circulation pipe 4, and the ejection pipe 5 is used to spray the fire extinguishing gas into the interior of the cabinet body 1.

[0023] The smart grid high-voltage outlet cabinet also includes a preheating component 6 configured inside the cabinet body 1. The preheating component 6 is used to preheat the high-pressure gas to prevent the high-pressure gas temperature from being low and affecting the speed of the fire extinguishing gas injection. The preheating component 6 includes a sleeve cavity 61 sliding on the outside of the circulation pipe 4. A section of copper tube 10 is fixed to the position of the circulation pipe 4 near the sleeve cavity 61. Bellows 62 are fixedly connected on both sides of the bottom of the sleeve cavity 61. The design of the bellows 62 does not affect the up and down movement of the sleeve cavity 61. The bottoms of the two bellows 62 are fixedly connected to a surrounding tube 65. The preheating component 6 also includes a heat exchange tube 63 fixedly connected to the interior of the circulation pipe 4. The top of the heat exchange tube 63 is fixedly connected to The conduit 64 is provided with a lifting assembly 7 at a position away from the heat exchange tube 63. The interior of the heat exchange tube 63 is filled with a gas that is easily expanded due to temperature changes. When the temperature is high, the lifting assembly 7 causes the sleeve cavity 61 to move away from the position of the copper tube 10. The lifting assembly 7 includes a sleeve 71 fixedly plugged into the end of the conduit 64 away from the heat exchange tube 63 and passing through the part of the circulation tube 4. A first piston plate 72 is movable inside the sleeve 71. A push rod 73 is fixedly connected to the top of the first piston plate 72. The top of the push rod 73 is fixed to the bottom of the sleeve cavity 61. The bottom of the sleeve cavity 61 is fixedly connected to a thermal insulation sleeve 11. The thermal insulation sleeve 11 is made of thermal insulation material. The conduit 64 is fixedly plugged into the bottom of the sleeve 71.

[0024] A medium for heating is added inside the jacket cavity 61 , which exchanges heat with the interior of the cabinet 1 through the surrounding pipe 65 , absorbing the heat generated by the components inside the cabinet 1 when in use, so that the temperature of the medium inside the jacket cavity 61 is higher.

[0025] The gas that is easily expanded when the temperature changes and is filled inside the heat exchange tube 63 may be carbon dioxide gas. When the temperature changes by twenty degrees, its volume expands by more than seven percent. The heat exchange tube 63 is made of copper material with strong thermal conductivity. In the cold winter in the Northeast, due to the low temperature, the temperature of the high-pressure gas used for fire extinguishing is low, so a preheating component 6 is provided. When the gas temperature is low, the temperature of the gas inside the heat exchange tube 63 is low, so that the first piston plate 72 is located at a lower position, so that the inner side of the sleeve cavity 61 is just located at the position of the copper tube 10. The medium inside the sleeve cavity 61 is heated by the fire extinguishing high-pressure gas at the copper tube 10, reducing the pressure drop in the gas tank 3 caused by low temperature, and improving the spraying speed and concentration uniformity of the fire extinguishing gas, thereby improving the speed of fire extinguishing and improving the safety of the outlet cabinet.

[0026] The heat exchange effect is poor at positions other than the copper tube 10 in the circulation tube 4. When the temperature of the fire extinguishing gas inside the circulation tube 4 increases, the fire extinguishing gas heats the gas inside the heat exchange tube 63, causing the gas inside the heat exchange tube 63 to expand and the pressure to increase. The gas enters the interior of the sleeve 71 through the conduit 64, causing the first piston plate 72 to move upward with the push rod 73 and the sleeve cavity 61, causing the inner side of the sleeve cavity 61 to gradually move away from the position of the copper tube 10, and the insulation sleeve 11 gradually covers the copper tube 10, reducing the heat exchange between the fire extinguishing gas and the outside, thereby preventing the fire extinguishing gas from absorbing too much heat and causing excessive pressure inside the gas tank 3.

[0027] It should be noted that, as the temperature inside the circulation pipe 4 decreases, the sleeve cavity 61 and the insulation sleeve 11 gradually move downward under the elastic force of the bellows 62 itself.

[0028] The surrounding tube 65 is made of copper, and the bottom of the surrounding tube 65 extends into the bottom position of the cabinet 1 .

[0029] By adopting the above technical solution, the surrounding pipe 65 can be arranged sufficiently to surround the components inside the cabinet 1, thereby absorbing more heat and improving the heat exchange effect of the fire extinguishing gas.

[0030] When the medium inside the surrounding tube 65 absorbs heat, it can cool the components inside the cabinet 1 and increase the life of the components inside the cabinet 1.

[0031] The diameter of the heat exchange tube 63 is much larger than the diameter of the sleeve 71, and the length of the heat exchange tube 63 is long, ensuring that the interior of the heat exchange tube 63 can be filled with more carbon dioxide gas. When the temperature of the heat exchange tube 63 changes, the volume of the carbon dioxide expansion is sufficient to allow the first piston plate 72 to move with the push rod 73 and the sleeve cavity 61.

[0032] A long plate 12 is fixedly connected between the circulation pipe 4 and the surrounding pipe 65, and a motor 13 is fixedly connected to the top of the long plate 12. The output shaft of the motor 13 is fixedly connected to the driving gear 14. The right part of the surrounding pipe 65 and the circulation pipe 4 near the driving gear 14 are both provided with a flow component 8. The long plate 12 is used to fix the circulation pipe 4 and the surrounding pipe 65. The flow component 8 at the circulation pipe 4 includes a passive gear 81 rotatably connected to the outside of the circulation pipe 4. The flow component 8 at the circulation pipe 4 also includes a rotating frame 82 rotatably connected to the outside of the circulation pipe 4. The middle part of the rotating frame 82 is fixedly connected to a small shaft 83, and the bottom of the small shaft 83 is fixedly connected to a blade 84. The outer side of the rotating frame 82 and the inner side of the passive gear 81 are fixedly connected with a magnetic block 85. The flow component 8 at the circulation pipe 4 has the same structure as the flow component 8 at the surrounding pipe 65. The rotating frame 82 and the passive gear 81 in the flow component 8 at the surrounding pipe 65 are rotatably connected to the surrounding pipe 65.

[0033] By adopting the above technical solution, when heat exchange is carried out, the output shaft of the motor 13 is rotated, so that the driving gear 14 can be rotated, thereby rotating the passive gears 81 on both sides. Under the magnetic force of the magnetic block 85, the rotating frame 82 can be rotated following the passive gear 81, thereby rotating the small shaft 83 and the blade 84. Such a design can make the fire-extinguishing gas in the circulation pipe 4 circulate, which is beneficial to the uniform temperature of the gas inside the gas tank 3 and improve the effect of heating the fire-extinguishing gas. At the same time, the medium used for heating flows in the surrounding pipe 65, so that the temperature of the medium used for heating inside the surrounding pipe 65 and the sleeve cavity 61 is uniform.

[0034] Ventilation holes 15 are provided at both ends of the top and bottom of the cabinet body 1. A cover body 16 is fixedly connected to the cabinet body 1 near the ventilation holes 15. A round rod 17 is fixedly connected to the inner side of the cover body 16. A closing plate 24 is rotatably connected to the outer side of the round rod 17. A sealing strip is fixedly connected to the bottom of the closing plate 24 to ensure the sealing of the closing plate 24 when it is closed. A torsion spring 18 is fixedly connected between the closing plate 24 and the round rod 17. An electric telescopic rod 19 is fixedly installed on the inner side of the cabinet body 1 near the closing plate 24, and the output shaft end of the electric telescopic rod 19 is close to the closing plate 24.

[0035] By adopting the above technical solution, multiple smoke sensors are provided inside the cabinet 1, which are evenly distributed inside the cabinet 1. When the smoke sensor senses smoke, the solenoid valve is controlled to open through the external controller, and the output shaft of the electric telescopic rod 19 is controlled to retract, and then the power supply in the cabinet 1 is immediately cut off to ensure the safety inside the cabinet 1. At this time, high-pressure gas is ejected from the nozzle 21 through the ejection pipe 5 and the hose 22, so that the fire extinguishing gas enters the cabinet 1 to extinguish the fire.

[0036] When the output shaft of the electric telescopic rod 19 contracts, the closing plate 24 closes the vent 15 under the elastic force of the torsion spring 18 to ensure the sealing inside the cabinet 1, thereby ensuring the concentration of the fire extinguishing gas in the cabinet 1 and improving the fire extinguishing effect.

[0037] It should be noted that a fan can be installed at the ventilation port 15 at the bottom. When the temperature inside the cabinet 1 is too high, the heat is dissipated by the rotation of the fan. The cover 16 can be installed with a dustproof net for dust prevention. When the cabinet 1 is running, the electric telescopic rod 19 remains in an extended state so that the closing plate 24 does not close the ventilation port 15.

[0038] It should be noted that the device is externally configured with a UPS power supply, which is electrically connected to the smoke sensor, the electric telescopic rod 19 and the solenoid valve to avoid the smoke sensor, the electric telescopic rod 19 and the solenoid valve being unable to function normally due to power outages in the event of a short circuit fire. When the output shaft of the electric telescopic rod 19 contracts and the solenoid valve opens, the power provided by the UPS is immediately cut off. The UPS power supply and its use are mature existing technologies and will not be elaborated on in detail.

[0039] Embodiment 2: The technical solution of this embodiment is different from that of embodiment 1 in that: Figures 1 to 5 and Figures 11 to 14 The outside of the ejection pipe 5 is rotatably connected to a plurality of rotating shafts 25, a rotating frame 20 is fixed to the outside of the rotating shaft 25, a nozzle 21 is fixedly installed inside the rotating frame 20, a hose 22 is fixedly inserted between the nozzle 21 and the ejection pipe 5, and a third gear 23 is fixedly connected to the end of the rotating shaft 25.

[0040] A swing assembly 9 is provided at the upper closing plate 24. The swing assembly 9 includes a frame 91 fixedly connected to the top of the inner side of the cabinet 1. A bellows 92 is fixed inside the frame 91. The top of the bellows 92 is fixedly connected to a lower pressure frame 93. The top of the lower pressure frame 93 extends into the interior of the cover 16. The swing assembly 9 also includes a main cylinder 94 fixedly connected to the inner side of the cabinet 1. A second piston plate 95 is movable inside the main cylinder 94. A lifting frame 96 is fixed to the bottom of the second piston plate 95. The swing assembly 9 also includes a slip ring 97 slidably connected to the outside of the ejection pipe 5. The outside of the ejection pipe 5 is fixedly connected to a fixed ring 98 above the slip ring 97. The fixed ring 98 and the slip ring A second spring 99 is fixedly connected between 97, a baffle 910 is fixedly connected to the front side of the slip ring 97, an elastic sheet 911 is fixed in a linear array on the side of the lifting frame 96 close to the baffle 910, a connecting pipe 912 is fixedly inserted between the main cylinder 94 and the corrugated bag 92, a rack 26 is fixed at the bottom of the elastic sheet 911, and the rack 26 is provided with teeth near the third gear 23, and the teeth provided on the rack 26 are engaged with the third gear 23, a through groove 913 is provided inside the connecting pipe 912, and an elastic bag 914 is fixed to the outer wall of the connecting pipe 912 outside the through groove 913, and a baffle 915 is fixedly connected to the inside of the connecting pipe 912, and a small hole is provided inside the baffle 915.

[0041] It should be noted that the elastic force of the torsion spring 18 is set to be relatively large, much larger than the sum of the elastic forces of the bellows 92 and the elastic sac 914. The elastic force of the elastic sac 914 is larger than the elastic force of the elastic sheet 911. The interior of the bellows 92 is filled with a relatively viscous medium.

[0042] By adopting the above technical solution, after the output shaft of the electric telescopic rod 19 contracts, the closing plate 24 closes the vent 15 under the elastic force of the torsion spring 18, and the closing plate 24 squeezes the lower pressure frame 93, so that the lower pressure frame 93 squeezes the corrugated bag 92, and the medium inside the corrugated bag 92 enters the interior of the connecting tube 912, and then enters the interior of the main cylinder 94, so that the second piston plate 95 inside the main cylinder 94 moves downward with the lifting frame 96. During the downward movement of the lifting frame 96, the elastic sheets 911 of the linear array will pass through the baffle 910 in sequence.

[0043] When one of the elastic sheets 911 passes through the baffle 910, in the initial state, the elastic sheet 911 squeezes the baffle 910, causing the baffle 910 to move downward with the slip ring 97, and the second spring 99 gradually extends. At this time, the slip ring 97 moves downward with the rack 26. Since the rack 26 is engaged with the third gear 23, multiple third gears 23 can rotate with the rotating shaft 25, the nozzle 21 and the rotating frame 20, thereby achieving the goal of evenly spraying the ejected fire extinguishing gas into the interior of the cabinet 1, reducing the blind area covered by the fire extinguishing gas, and further improving the fire extinguishing effect.

[0044] As the elastic sheet 911 gradually moves downward with the baffle 910 and the slip ring 97, when the second spring 99 stretches to a certain extent and the elastic force provided is greater than the elastic force of the elastic sheet 911, the elastic sheet 911 deforms and passes through the baffle 910. Under the elastic force of the second spring 99, the baffle 910 is reset, making it easier for the next elastic sheet 911 to squeeze the baffle 910.

[0045] It should be noted that, since the medium inside the corrugated bag 92 is viscous and under the blocking effect of the blocking plate 915, the medium can only enter the main tube 94 through the small hole at a slower speed. When the closing plate 24 quickly closes the vent 15, the medium cannot quickly enter the main tube 94, so that the medium enters the interior of the elastic bag 914 through the through groove 913, and the elastic bag 914 expands.

[0046] Since the internal pressure of the elastic bag 914 is relatively high when it expands, the medium in the elastic bag 914 enters the main tube 94 at a slower speed. After the power is cut off and the fire is extinguished, the lifting frame 96 can continue to descend with the elastic sheet 911, so that multiple elastic sheets 911 pass through the baffle 910, so that when the fire extinguishing gas is subsequently sprayed out, the nozzle 21 can evenly spray the fire extinguishing gas into the interior of the cabinet 1, and no electricity is required in this process, reducing the risk of electricity use during a fire.

[0047] S1. Heating: A heating medium is added to the jacket cavity 61. Through the surrounding tube 65, heat is exchanged with the interior of the cabinet 1. The heat generated by the components inside the cabinet 1 during use is absorbed, so that the temperature of the medium inside the jacket cavity 61 is relatively high. The medium inside the jacket cavity 61 is heated by the high-pressure fire extinguishing gas at the copper tube 10, reducing the pressure drop in the gas tank 3 caused by low temperature, thereby improving the spraying speed and concentration uniformity of the fire extinguishing gas. S2. Fire extinguishing. Multiple smoke sensors are evenly distributed inside the cabinet 1. When the smoke sensors sense smoke, the solenoid valve is controlled to open by the external controller, and the output shaft of the electric telescopic rod 19 is controlled to retract, and the power supply in the cabinet 1 is immediately cut off to ensure the safety inside the cabinet 1. At this time, high-pressure gas is ejected from the nozzle 21 through the ejection pipe 5 and the hose 22, so that the fire extinguishing gas enters the cabinet 1 to extinguish the fire.

[0048] Working principle: When the temperature of the fire extinguishing gas inside the circulation pipe 4 increases, the fire extinguishing gas heats the gas inside the heat exchange pipe 63, causing the gas inside the heat exchange pipe 63 to expand and the pressure to increase. The gas enters the interior of the sleeve 71 through the conduit 64, causing the first piston plate 72 to move upward with the push rod 73 and the sleeve cavity 61, so that the inner side of the sleeve cavity 61 gradually moves away from the position of the copper tube 10, and the insulation sleeve 11 gradually covers the copper tube 10, reducing the heat exchange between the fire extinguishing gas and the outside, thereby preventing the fire extinguishing gas from absorbing too much heat and causing excessive pressure inside the gas tank 3.

[0049] During heat exchange, the output shaft of the motor 13 rotates, which can cause the driving gear 14 to rotate, thereby causing the passive gears 81 on both sides to rotate. Under the magnetic force of the magnetic block 85, the rotating frame 82 can follow the passive gear 81 to rotate, thereby causing the small shaft 83 and the blade 84 to rotate. This design can make the fire-extinguishing gas in the circulation pipe 4 circulate, which is conducive to the uniform temperature of the gas inside the gas tank 3 and improve the effect of heating the fire-extinguishing gas. At the same time, the medium used for heating flows in the surrounding pipe 65, so that the temperature of the medium used for heating inside the surrounding pipe 65 and the sleeve cavity 61 is uniform. When the output shaft of the electric telescopic rod 19 contracts, under the elastic force of the torsion spring 18, the closing plate 24 closes the vent 15 to ensure the sealing inside the cabinet 1, thereby ensuring the concentration of the fire-extinguishing gas in the cabinet 1 and improving the fire extinguishing effect.

[0050] When the output shaft of the electric telescopic rod 19 is retracted, the closing plate 24 closes the vent 15 under the elastic force of the torsion spring 18, and the closing plate 24 squeezes the lower pressure frame 93, so that the lower pressure frame 93 squeezes the corrugated bag 92, and the medium inside the corrugated bag 92 enters the interior of the connecting pipe 912, and then enters the interior of the main cylinder 94, so that the second piston plate 95 inside the main cylinder 94 moves downward with the lifting frame 96. During the downward movement of the lifting frame 96, the elastic sheets 911 of the linear array will pass through in sequence. Passing the baffle 910, when one of the elastic sheets 911 passes through the baffle 910, the elastic sheet 911 squeezes the baffle 910 in the initial state, causing the baffle 910 to move downward with the slip ring 97, and the second spring 99 gradually extends. At this time, the slip ring 97 moves downward with the rack 26. Since the rack 26 is engaged with the third gear 23, multiple third gears 23 can rotate with the rotating shaft 25, the nozzle 21 and the rotating frame 20, thereby achieving the goal of evenly spraying the ejected fire extinguishing gas into the interior of the cabinet 1, reducing the blind area covered by the fire extinguishing gas.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-safety smart grid high-voltage outlet cabinet, comprising a cabinet body (1), a cabinet door (2) hingedly connected to the front side of the cabinet body (1), a gas tank (3) installed at the rear end of the cabinet body (1), the interior of the gas tank (3) filled with gas for fire extinguishing, a circulation pipe (4) plugged into the front end of the gas tank (3), the circulation pipe (4) extending into the interior of the cabinet body (1) and plugged into a spray pipe (5), the spray pipe (5) being used to spray the fire extinguishing gas into the interior of the cabinet body (1), characterized in that: Smart grid high-voltage distribution cabinet also includes: A preheating assembly (6) is arranged inside the cabinet (1). The preheating assembly (6) is used to preheat the high-pressure gas to prevent the high-pressure gas temperature from being low and affecting the speed of the fire extinguishing gas injection. The preheating assembly (6) includes a sleeve cavity (61) sliding on the outside of the circulation pipe (4). A section of copper tube (10) is fixed at a position of the circulation pipe (4) near the sleeve cavity (61). Bellows (62) are fixedly inserted on both sides of the bottom of the sleeve cavity (61). The bottoms of the two bellows (62) are fixedly connected to a surrounding tube (65). The preheating assembly (6) also includes a heat exchange tube (63) fixedly connected to the inside of the circulation pipe (4). A guide tube (64) is fixedly connected to the top of the heat exchange tube (63). A lifting assembly (7) is arranged at the guide tube (64) away from the heat exchange tube (63). The inside of the heat exchange tube (63) is filled with a gas that is easily expanded when the temperature changes. When the temperature is high, the lifting assembly (7) causes the sleeve cavity (61) to move away from the position of the copper tube (10).

2. A highly secure smart grid high-voltage outlet cabinet according to claim 1, characterized in that: The lifting assembly (7) includes: The sleeve (71) is fixedly connected to the portion of the end of the conduit (64) away from the heat exchange tube (63) that passes through the circulation tube (4). A first piston plate (72) is movable inside the sleeve (71). A push rod (73) is fixedly connected to the top of the first piston plate (72). The top of the push rod (73) is fixed to the bottom of the sleeve cavity (61).

3. The highly secure smart grid high-voltage outlet cabinet according to claim 1, characterized in that: The bottom of the sleeve cavity (61) is fixedly connected to a heat-insulating sleeve (11), the surrounding tube (65) is made of copper material, and the bottom of the surrounding tube (65) extends into the bottom position of the cabinet (1).

4. The highly secure smart grid high-voltage outlet cabinet according to claim 1, characterized in that: The diameter of the heat exchange tube (63) is larger than the diameter of the sleeve (71).

5. The highly secure smart grid high-voltage outlet cabinet according to claim 1, characterized in that: A long plate (12) is fixedly connected between the circulation pipe (4) and the surrounding pipe (65), a motor (13) is fixedly connected to the top of the long plate (12), an output shaft of the motor (13) is fixedly connected to a driving gear (14), and a flow assembly (8) is configured on the right side of the surrounding pipe (65) and near the driving gear (14) of the circulation pipe (4).

6. The highly secure smart grid high-voltage outlet cabinet according to claim 5, characterized in that: The flow assembly (8) at the circulation pipe (4) includes a passive gear (81) rotatably connected to the outside of the circulation pipe (4). The flow assembly (8) at the circulation pipe (4) also includes a rotating frame (82) rotatably connected to the outside of the circulation pipe (4). The middle part of the rotating frame (82) is fixedly connected to a small shaft (83), and the bottom of the small shaft (83) is fixedly connected to a blade (84). The outer side of the rotating frame (82) and the inner side of the passive gear (81) are both fixedly connected to a magnetic block (85). The flow assembly (8) at the circulation pipe (4) has the same structure as the flow assembly (8) at the surrounding pipe (65).

7. The highly secure smart grid high-voltage outlet cabinet according to claim 1, characterized in that: The cabinet body (1) is provided with ventilation holes (15) at both ends of the top and bottom. A cover body (16) is fixedly connected to the cabinet body (1) near the ventilation hole (15). A round rod (17) is fixedly connected to the inner side of the cover body (16). A closing plate (24) is rotatably connected to the outer side of the round rod (17). A torsion spring (18) is fixedly connected between the closing plate (24) and the round rod (17). An electric telescopic rod (19) is fixedly installed on the inner side of the cabinet body (1) near the closing plate (24).

8. The highly secure smart grid high-voltage outlet cabinet according to claim 7, characterized in that: The outer rotation of the ejection pipe (5) is connected to a plurality of rotating shafts (25), a rotating frame (20) is fixed on the outer side of the rotating shaft (25), a nozzle (21) is fixedly installed inside the rotating frame (20), a hose (22) is fixedly connected between the nozzle (21) and the ejection pipe (5), the end of the rotating shaft (25) is fixedly connected to a third gear (23), and a swing assembly (9) is arranged at the upper closing plate (24), the swing assembly (9) includes a frame (91) fixedly connected to the top of the inner side of the cabinet (1), a corrugated bag (92) is fixed inside the frame (91), the top of the corrugated bag (92) is fixedly connected to a lower pressure frame (93), the top of the lower pressure frame (93) extends into the interior of the cover (16), the swing assembly (9) also includes a main cylinder (94) fixedly connected to the inner side of the cabinet (1), and the inner side of the main cylinder (94) is movable with a third gear (23). The second piston plate (95) is fixed with a lifting frame (96) at the bottom of the second piston plate (95), and the swing assembly (9) further includes a slip ring (97) slidably connected to the outside of the ejection pipe (5), and a fixed ring (98) is fixedly connected to the outside of the ejection pipe (5) above the slip ring (97), and a second spring (99) is fixedly connected between the fixed ring (98) and the slip ring (97), and a baffle (910) is fixedly connected to the front side of the slip ring (97), and an elastic sheet (911) is fixed in a linear array on one side of the lifting frame (96) close to the baffle (910), and a connecting pipe (912) is fixedly inserted between the main cylinder (94) and the corrugated bag (92), and a rack (26) is fixed at the bottom of the elastic sheet (911), and teeth are provided on the rack (26) near the third gear (23), and the teeth provided on the rack (26) are engaged with the third gear (23).

9. The highly secure smart grid high-voltage outlet cabinet according to claim 8, characterized in that: A through groove (913) is provided inside the connecting tube (912); an elastic bag (914) is fixed to the outer wall of the connecting tube (912) outside the through groove (913); a blocking piece (915) is fixedly connected to the inside of the connecting tube (912); and a small hole is provided inside the blocking piece (915).

10. A highly safe fire extinguishing method for a smart grid high-voltage outlet cabinet, characterized by: The method is applicable to the smart grid high-voltage outlet cabinet according to any one of claims 1 to 9, and comprises the following steps: S1, heating, the internal medium of the sleeve cavity (61) is heated by fire extinguishing gas; S2, fire extinguishing, the fire extinguishing gas enters the ejection pipe (5) from the circulation pipe (4) and is ejected to achieve fire extinguishing.

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