CN110911970A - An automatic fire extinguishing device suitable for small power distribution cabinets - Google Patents
An automatic fire extinguishing device suitable for small power distribution cabinets Download PDFInfo
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- CN110911970A CN110911970A CN201911265946.XA CN201911265946A CN110911970A CN 110911970 A CN110911970 A CN 110911970A CN 201911265946 A CN201911265946 A CN 201911265946A CN 110911970 A CN110911970 A CN 110911970A
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- permanent magnet
- power distribution
- fire
- storage box
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- 238000002955 isolation Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 34
- 230000005294 ferromagnetic effect Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 4
- 229910052742 iron Inorganic materials 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 12
- 239000007789 gas Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- OJLGWNFZMTVNCX-UHFFFAOYSA-N dioxido(dioxo)tungsten;zirconium(4+) Chemical compound [Zr+4].[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O OJLGWNFZMTVNCX-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004254 Ammonium phosphate Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 2
- 235000019289 ammonium phosphates Nutrition 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
本发明公开了一种适用于小型配电柜的自动灭火装置，包括固定盒，所述固定盒的内顶壁上固定安装有柱形筒，所述柱形筒的底端固定连接有锥形筒，且柱形筒的底部贯穿固定盒的底壁并延伸至固定盒的外侧，所述固定盒的内侧壁上对称设置有多个第一储存盒、第二储存盒和多根耐热管道，且每个第一储存盒上均设有开启机构并通过开启机构与对应的耐热管道相连通，所述柱形筒内设有隔绝机构。本发明结构合理，安装简单，适用于各种规格的小型配电柜，在火灾发生初期或物体阴燃状态下，本装置可以自动对火情发生处进行灭火，无需人工监察，省略了管理人员发现火情、寻找灭火设备的过程，可显著减低火灾造成的不良影响。
The invention discloses an automatic fire extinguishing device suitable for small power distribution cabinets. The bottom of the cylindrical cylinder penetrates the bottom wall of the fixed box and extends to the outside of the fixed box, and the inner side wall of the fixed box is symmetrically arranged with a plurality of first storage boxes, second storage boxes and a plurality of heat-resistant pipes , and each first storage box is provided with an opening mechanism and communicates with the corresponding heat-resistant pipe through the opening mechanism, and an isolation mechanism is arranged in the cylindrical barrel. The invention has reasonable structure and simple installation, and is suitable for small power distribution cabinets of various specifications. In the initial stage of a fire or in the state of smoldering objects, the device can automatically extinguish the fire at the place where the fire occurs, without manual supervision and omitting management personnel. The process of finding fire and finding extinguishing equipment can significantly reduce the adverse effects of fire.
Description
Technical Field
The invention relates to the technical field of power distribution cabinets, in particular to an automatic fire extinguishing device suitable for a small power distribution cabinet.
Background
Along with the development of science and technology and economy, more and more power equipment is used in daily life, for the guarantee power supply demand, power system is also more and more perfect, important distribution equipment among the power system is regarded as to the switch board, multiple design specification has, because cable and controlgear are more in quantity in the switch board, and play important regulation and control effect to subordinate's circuit, in case the switch board internal circuit short circuit causes the fire can cause great economic loss, consequently people attach importance to the fire prevention work of switch board more and more.
The fire prevention of current switch board, the mode of putting out a fire is comparatively single, only install the heat dissipation fan in the switch board, or place the fire extinguisher outside the switch board, when switch board inner circuit short circuit, when transshipping, very easily lead to the emergence of conflagration, when managers discover the condition of a fire handheld fire extinguisher again and put out a fire to it, flame has caused more damage to the power equipment of switch board inside, if managers do not discover the condition of a fire, then a switch board catches fire and can lead to catching fire of whole electricity distribution room even, thereby cause serious consequence, for this reason, we provide one kind and need not the automatic fire extinguishing device of artifical supervision's be applicable to small-size switch board.
Disclosure of Invention
The invention aims to solve the defects that in the prior art, a fire extinguishing means of a power distribution cabinet is single, and people are difficult to find fire conditions at the initial stage of fire, and provides an automatic fire extinguishing device suitable for a small power distribution cabinet.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic fire extinguishing device suitable for a small power distribution cabinet comprises a fixed box, wherein a cylindrical barrel is fixedly mounted on the inner top wall of the fixed box, the bottom end of the cylindrical barrel is fixedly connected with a conical barrel, the bottom of the cylindrical barrel penetrates through the bottom wall of the fixed box and extends to the outer side of the fixed box, a plurality of first storage boxes, a plurality of second storage boxes and a plurality of heat-resistant pipelines are symmetrically arranged on the inner side wall of the fixed box, and each first storage box is provided with an opening mechanism and communicated with a corresponding heat-resistant pipeline through the opening mechanism;
an isolation mechanism is arranged in the cylindrical barrel and comprises a second permanent magnet, a sliding rod and a plurality of elastic sheets, the sliding rod is fixed at the bottom of the second permanent magnet, the second permanent magnet is fixedly arranged at the top of the cylindrical barrel, a ferromagnetic block is arranged on the sliding rod in a sliding manner, a direction changing device is connected between each elastic sheet and the ferromagnetic block, a plurality of guide grooves are formed in the cylindrical barrel in the circumferential direction, and the bottom end of each elastic sheet is located in the corresponding guide groove;
a plurality of ventilation openings are formed in the fixing box, and are distributed along the circumferential direction of the central axis of the conical barrel.
Preferably, each deviator all includes the ball seat that links to each other with ferromagnetic piece lower surface is fixed and the bowl-shaped connecting piece of rotation installation on the ball seat, every bowl-shaped connecting piece all is connected with the upper end rotation that corresponds the elastic sheet through the pivot.
Preferably, each opening mechanism comprises a first permanent magnet, a bent rod, a sealing cover and a sealing block, one end, close to the second permanent magnet, of each first permanent magnet is connected with the side wall of the cylindrical barrel through a spring, the other end of each first permanent magnet is connected with the upper end of the corresponding bent rod through a plurality of pull ropes, each sealing cover is fixedly mounted on the inner side wall of the corresponding first storage box, each sealing block is arranged between the corresponding sealing cover and the corresponding first storage box in a sealing sliding mode and fixedly connected with the bottom end of the corresponding bent rod, and the position of each sealing block corresponds to the position of the corresponding heat-resistant pipeline.
Preferably, each second storage box is fixedly mounted on the corresponding heat-resistant pipeline, the bottom wall of each second storage box is arc-shaped and is matched with the specification of the corresponding heat-resistant pipeline, a communication groove is formed in the joint of each second storage box and the corresponding heat-resistant pipeline, a Z-shaped plate is arranged in the communication groove, the upper end of each Z-shaped plate is connected with the inner bottom wall of the corresponding second storage box in a sliding manner, and the lower end of each Z-shaped plate is connected with the inner side wall of the corresponding heat-resistant pipeline in a sliding manner.
The invention has the beneficial effects that:
1. through setting up the first permanent magnet and the second permanent magnet that the curie point is different, when the second permanent magnet loses magnetism, demagnetization phenomenon has not taken place yet to first permanent magnet, therefore effort between first permanent magnet and the second permanent magnet changes appeal from repulsion into, can accelerate the speed that first permanent magnet is close to the second permanent magnet to make the quick upwards slip of sealing block, make heat-resisting pipeline and first seal box intercommunication.
2. Through using the metal grid net of compactness to hold sodium bicarbonate, can accelerate sodium bicarbonate's decomposition with the help of the good heat conductivity of metal, before the demagnetization of second permanent magnet is accomplished, sodium bicarbonate can thoroughly decompose to play the effect of putting out a fire fast, and can improve sodium bicarbonate's utilization ratio.
3. When the condition of a fire does not appear, the convection current can be realized with the external air from vent department to the inside air of switch board, and help inside air keeps fresh, and when the condition of a fire appeared, the elastic sheet can shelter from the vent completely with the kickup to the convection current of isolated air, when oxygen in the switch board can't follow external world and supply, flame can extinguish fast naturally.
4. The windward area of Z shaped plate lower extreme is bigger, and the air current in the heat-resisting pipeline can produce the pushing action to the Z shaped plate, makes Z shaped plate self-sliding, and the box can be directly communicate with heat-resisting pipeline to the second is stored to the Z shaped plate after sliding to make the second store the ammonium sulfate salt in the box and spray away along with the air current, thereby play better fire extinguishing effect.
5. Through setting up toper section of thick bamboo and guide way, can make the elastic thin slice be the tilt state when the roll-off guide way to make the ascending air current hold up the elastic thin slice more easily, accelerate the closure of vent.
6. Through setting up the phase change device that ball seat, bowl shape connecting piece, pivot are constituteed, can make the elastic sheet at certain angle within range internal rotation to better with the angle of buckling cooperation of guide way, prevent that the elastic sheet card is in the guide way.
In conclusion, the fire extinguishing device is reasonable in structure, simple to install and suitable for small power distribution cabinets of various specifications, can automatically extinguish a fire at a fire occurrence position in the initial stage of a fire or in a smoldering state of an object, does not need manual supervision, omits the process of finding the fire and searching fire extinguishing equipment by managers, and can remarkably reduce adverse effects caused by the fire.
Drawings
Fig. 1 is a schematic structural diagram of an automatic fire extinguishing apparatus suitable for a small-sized power distribution cabinet according to the present invention;
FIG. 2 is a bottom view of a cone-shaped cylinder in the automatic fire extinguishing apparatus for a small-sized power distribution cabinet according to the present invention;
FIG. 3 is an enlarged view of FIG. 1 at A;
fig. 4 is a partial structural schematic diagram of an opening mechanism in an automatic fire extinguishing apparatus suitable for a small-sized power distribution cabinet according to the present invention;
FIG. 5 is a schematic structural diagram of a Z-shaped plate in an automatic fire extinguishing apparatus suitable for a small-sized power distribution cabinet according to the present invention;
fig. 6 is a schematic position diagram of an isolation mechanism when the automatic fire extinguishing device suitable for the small power distribution cabinet provided by the invention extinguishes fire.
In the figure: the device comprises a fixing box 1, a first permanent magnet 2, a second permanent magnet 3, a cylindrical barrel 4, a first storage box 5, a second storage box 6, a metal grid 7, a ferromagnetic block 8, a bent rod 9, an opening mechanism 10, a heat-resistant pipeline 11, an elastic sheet 12, a conical barrel 13, a guide groove 1301, a vent hole 14, a slide rod 15, a ball seat 16, a bowl-shaped connecting piece 17, a sealing cover 18, a sealing block 19, a sealing edge 1901, a communication groove 20 and a Z-shaped plate 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, an automatic fire extinguishing apparatus suitable for a small-sized power distribution cabinet comprises a fixed box 1, a cylindrical tube 4 is fixedly installed on an inner top wall of the fixed box 1, a conical tube 13 is fixedly connected to the bottom end of the cylindrical tube 4, the bottom of the cylindrical tube 4 penetrates through the bottom wall of the fixed box 1 and extends to the outer side of the fixed box 1, a plurality of first storage boxes 5, a plurality of second storage boxes 6 and a plurality of heat-resistant pipelines 11 are symmetrically arranged on the inner side wall of the fixed box 1, and each first storage box 5 is provided with an opening mechanism 10 and communicated with the corresponding heat-resistant pipeline 11 through the opening mechanism 10;
an isolation mechanism is arranged in the cylindrical barrel 4 and comprises a second permanent magnet 3, a sliding rod 15 and a plurality of elastic sheets 12, wherein the sliding rod 15 and the elastic sheets 12 are fixed at the bottom of the second permanent magnet 3, the second permanent magnet 3 is fixedly arranged at the top of the cylindrical barrel 4, a ferromagnetic block 8 is arranged on the sliding rod 15 in a sliding manner, a direction changing device is connected between each elastic sheet 12 and the ferromagnetic block 8, a plurality of guide grooves 1301 are formed in the cylindrical barrel 4 in the circumferential direction, and the bottom end of each elastic sheet 12 is positioned in the corresponding guide groove 1301 and is in a stacking staggered shape;
the Curie point of the second permanent magnet 3 is about 300 ℃, the environmental temperature of the power distribution cabinet during fire is above 500 ℃, even reaches thousands of degrees, so that the second permanent magnet 3 can be rapidly demagnetized in a high-temperature environment, in addition, the Curie point of the first permanent magnet 2 is higher than that of the second permanent magnet 3, and the first permanent magnet 2 can be demagnetized after the second permanent magnet 3 is demagnetized;
the polarity of the opposite side of each first permanent magnet 2 and the second permanent magnet 3 is opposite, and each spring is in a stretching state in a natural state;
a plurality of ventilation openings 14 are formed in the fixed box 1, and the ventilation openings 14 are circumferentially distributed along the central axis of the conical barrel 13;
the elastic sheet 12 is made of flexible graphite packing or composite materials with different thermal expansion coefficients, the composite materials can be formed by alternately compounding a plurality of layers of zirconium tungstate films and a plurality of layers of asbestos net layers, the zirconium tungstate films have negative thermal expansion and can generate a thermal shrinkage phenomenon at high temperature, when the zirconium tungstate films are positioned above the asbestos net layers, the zirconium tungstate films can drive the asbestos net layers to bend and upwarp along with the rise of the ambient temperature, and rising airflow can be generated in the power distribution cabinet due to the rise of the temperature and the expansion of air, so that the elastic sheet 12 is lifted, and the vent 14 is completely covered by the elastic sheet.
In the invention, each direction changing device comprises a ball seat 16 fixedly connected with the lower surface of the ferromagnetic block 8 and a bowl-shaped connecting piece 17 rotatably arranged on the ball seat 16, and each bowl-shaped connecting piece 17 is rotatably connected with the upper end of the corresponding elastic sheet 12 through a rotating shaft.
Each opening mechanism comprises a first permanent magnet 2, a bent rod 9, a sealing cover 18 and a sealing block 19, one end, close to a second permanent magnet 3, of each first permanent magnet 2 is connected with the side wall of the cylindrical barrel 4 through a spring, the other end of each first permanent magnet 2 is connected with the upper end of the corresponding bent rod 9 through a plurality of pull ropes, each sealing cover 18 is fixedly installed on the inner side wall of the corresponding first storage box 5, each sealing block 19 is hermetically and slidably arranged between the corresponding sealing cover 18 and the first storage box 5 and fixedly connected with the bottom end of the corresponding bent rod 9, the position of each sealing block 19 corresponds to the position of the corresponding heat-resistant pipeline 11, a sealing edge 1901 is glued to the side wall of each sealing block 19, the sealing edge 1901 is made of rubber, and the sealing performance between the sealing block 19 and the sealing cover 18 and the first storage box 5 can be improved;
each sealing cover 18 is provided with a through hole corresponding to the position of the corresponding heat-resistant pipeline 11, each first storage box 5 is internally provided with a metal grid 7, and the metal grid 7 is compact and only allows gas to enter the heat-resistant pipeline 11 from the through hole.
Every second stores the equal fixed mounting of box 6 on the heat-resistant pipeline 11 that corresponds, and the diapire that every second stored box 6 is the arc and with the specification phase-match that corresponds heat-resistant pipeline 11, every second stores box 6 and corresponds heat-resistant pipeline 11 junction and has all seted up intercommunication groove 20 and be equipped with Z shaped plate 21 in intercommunication groove 20, the upper end of every Z shaped plate 21 all with the interior diapire that corresponds second storage box 6 slide and meet, the lower extreme of every Z shaped plate 21 all with the inside wall that corresponds heat-resistant pipeline 11 slide and meet.
The cross section of one end of each Z-shaped plate 21, which is located in the corresponding heat-resistant pipeline 11, is a right-angled triangle, a shorter right-angled edge of the cross section is perpendicular to the central axis of the corresponding heat-resistant pipeline 11, the sectional area of the lower end of each Z-shaped plate 21 is larger, namely, the windward area is larger, airflow in the heat-resistant pipeline 11 can push the Z-shaped plates, and the second storage box 6 can be directly communicated with the heat-resistant pipeline 11 after the Z-shaped plates 21 slide towards the direction far away from the conical barrel 13.
When the device is used, the fixed box 1 is arranged above a flammable line or equipment, then sodium bicarbonate solid and ammonium phosphate solid are respectively put into the first storage box 5 and the second storage box 6, at the moment, under the action of the magnetic force of the second permanent magnet 3, the ferromagnetic blocks 8 are close to the second permanent magnet 3, the elastic sheets 12 are positioned in the conical barrel 13, the spring is in a stretching state due to the repulsion of the first permanent magnet 2 and the second permanent magnet 3, the pull rope between the first permanent magnet 2 and the bent rod 9 is in a loose state, and under the action of gravity, the sealing block 19 slides to the lowest end of the sealing cover 18 and blocks the communication between the first storage box 5 and the heat-resistant pipeline 11; in the initial state, the Z-shaped plate 21 plays a role in sealing the communication groove 20, and the dry powder extinguishing agent in the second storage box 6 is blocked by the Z-shaped plate 21 and cannot enter the heat-resistant pipeline 11;
when smoldering or open fire occurs in the power distribution cabinet, the ambient temperature at the burning position rises rapidly, because the ferromagnetic blocks 8 and the metal grid 7 are good heat conductors, the temperature rise speed in the cylindrical barrel 4 and the first storage box 5 is higher than the whole temperature rise speed in the fixed box 1, when the temperature in the cylindrical barrel 4 reaches above the Curie point of the second permanent magnet 3, the second permanent magnet 3 demagnetizes in a very short time, and along with the temperature rise, the sodium bicarbonate in the first storage box 5 is completely decomposed (the complete decomposition temperature of the sodium bicarbonate is about 270 ℃), so that carbon dioxide gas and water vapor are generated;
at this time, because the second permanent magnet 3 generates a demagnetization phenomenon, the demagnetized second permanent magnet 3 can be regarded as a common metal, on one hand, the first permanent magnet 2 can generate magnetic attraction to the ferromagnetic object, and therefore the first permanent magnet 2 is actively close to the demagnetized second permanent magnet 3; on the other hand, the repulsive force between the first permanent magnet 2 and the second permanent magnet 3 disappears, the spring drives the first permanent magnet 2 to approach the second permanent magnet 3, so the pull rope can quickly pull the bent rod 9 upwards to enable the sealing block 19 to move upwards, the first storage box 5 is communicated with the heat-resistant pipeline 11, carbon dioxide and water vapor in the first storage box 5 quickly flow into the heat-resistant pipeline 11, and the flow velocity of the mixed gas is increased and the pressure in the pipeline 11 is reduced because the pipe diameter of the heat-resistant pipeline 11 is smaller;
when the mixed gas flows to the Z-shaped plate 21, because the windward area of the Z-shaped plate 21 is large, the gas flow can push the Z-shaped plate 21 until the upper end of the Z-shaped plate 21 is abutted against the inner side wall of the second storage box 6, under the action of negative pressure, ammonium phosphate salt solids in the second storage box 6 are sprayed to the pipe orifice of the heat-resistant pipeline 11 along with the flow of the mixed gas, carbon dioxide in the mixed gas can inhibit the combustion of an object, and water vapor in the mixed gas can reduce the ambient temperature, so that the temperature reaches below the ignition point of the object; the ammonium phosphate solid can be decomposed after contacting with flame, wherein volatile decomposers of inorganic salt and free radicals or active groups generated by fuel in the combustion process have chemical inhibition and negative catalysis effects, so that the combustion chain reaction is interrupted to extinguish the fire, and a glass-shaped covering layer can be formed under the action of high temperature, thereby isolating oxygen and further extinguishing the fire by suffocation;
along with the disappearance of second permanent magnet 3 magnetism, ferromagnetic piece 8 can slide downwards along slide bar 15 under the action of gravity, when elastic sheet 12 stretched out conical cylinder 13 along respective guide way 1301, it was the slope form, if elastic sheet 12 adopted flexible graphite packing material to make, then can be held up by the air current that rises and with vent 14 laminating, and elastic sheet 12 is the range upon range of crisscross form, consequently can completely seal the vent 14 that fixed box 1 bottom circumference set up to block the convection current of switch board inside gas and external gas, the oxygen in the switch board can not supplement will further accelerate the speed that flame extinguishes.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. An automatic fire extinguishing device suitable for a small power distribution cabinet comprises a fixed box (1) and is characterized in that a cylindrical tube (4) is fixedly mounted on the inner top wall of the fixed box (1), a conical tube (13) is fixedly connected to the bottom end of the cylindrical tube (4), the bottom of the cylindrical tube (4) penetrates through the bottom wall of the fixed box (1) and extends to the outer side of the fixed box (1), a plurality of first storage boxes (5), a plurality of second storage boxes (6) and a plurality of heat-resistant pipelines (11) are symmetrically arranged on the inner side wall of the fixed box (1), and each first storage box (5) is provided with an opening mechanism (10) and communicated with the corresponding heat-resistant pipeline (11) through the opening mechanism (10);
an isolation mechanism is arranged in the cylindrical barrel (4), the isolation mechanism comprises a second permanent magnet (3), a sliding rod (15) fixed at the bottom of the second permanent magnet (3) and a plurality of elastic sheets (12), the second permanent magnet (3) is fixedly arranged at the top of the cylindrical barrel (4), an iron magnet block (8) is arranged on the sliding rod (15) in a sliding mode, a direction changing device is connected between each elastic sheet (12) and the iron magnet block (8), a plurality of guide grooves (1301) are formed in the cylindrical barrel (4) in the circumferential direction, and the bottom end of each elastic sheet (12) is located in the corresponding guide groove (1301);
a plurality of ventilation openings (14) are formed in the fixing box (1), and the ventilation openings (14) are circumferentially distributed along the central axis of the conical barrel (13).
2. The automatic fire extinguishing device applicable to the small-sized power distribution cabinet according to claim 1, wherein each direction changing device comprises a ball seat (16) fixedly connected with the lower surface of the ferromagnetic block (8) and a bowl-shaped connecting piece (17) rotatably installed on the ball seat (16), and each bowl-shaped connecting piece (17) is rotatably connected with the upper end of the corresponding elastic sheet (12) through a rotating shaft.
3. The automatic fire extinguishing device applicable to the small power distribution cabinet according to claim 1, wherein each opening mechanism comprises a first permanent magnet (2), a bent rod (9), a sealing cover (18) and a sealing block (19), one end, close to the second permanent magnet (3), of each first permanent magnet (2) is connected with the side wall of the cylindrical barrel (4) through a spring, the other end of each first permanent magnet (2) is connected with the upper end of the corresponding bent rod (9) through a plurality of pull ropes, each sealing cover (18) is fixedly installed on the inner side wall of the corresponding first storage box (5), and each sealing block (19) is arranged between the corresponding sealing cover (18) and the corresponding first storage box (5) in a sealing and sliding mode and is fixedly connected with the bottom end of the corresponding bent rod (9).
4. The automatic fire extinguishing device applicable to the small power distribution cabinet is characterized in that each second storage box (6) is fixedly installed on the corresponding heat-resistant pipeline (11), a communication groove (20) is formed at the joint of each second storage box (6) and the corresponding heat-resistant pipeline (11), a Z-shaped plate (21) is arranged in the communication groove (20), the upper end of each Z-shaped plate (21) is slidably connected with the inner bottom wall of the corresponding second storage box (6), and the lower end of each Z-shaped plate (21) is slidably connected with the inner side wall of the corresponding heat-resistant pipeline (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911265946.XA CN110911970B (en) | 2019-12-11 | 2019-12-11 | An automatic fire extinguishing device suitable for small power distribution cabinets |
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| CN201911265946.XA CN110911970B (en) | 2019-12-11 | 2019-12-11 | An automatic fire extinguishing device suitable for small power distribution cabinets |
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| CN110911970A true CN110911970A (en) | 2020-03-24 |
| CN110911970B CN110911970B (en) | 2020-11-27 |
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Cited By (7)
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| CN111585183A (en) * | 2020-06-03 | 2020-08-25 | 任宗愈 | Autonomous rainproof heat dissipation power distribution cabinet |
| CN111739239A (en) * | 2020-07-25 | 2020-10-02 | 冯艳 | Corridor lighting indicator lamp with fire emergency function |
| CN111888700A (en) * | 2020-08-07 | 2020-11-06 | 德清县诚达金属材料有限公司 | A high-efficient fire protection system for office building office |
| CN111991735A (en) * | 2020-09-08 | 2020-11-27 | 黄族辉 | Indoor self-excitation type intelligent fire-fighting equipment |
| CN113599740A (en) * | 2020-12-01 | 2021-11-05 | 黄清 | Electrical cabinet circuit protection fire prevention monitoring equipment and monitoring method thereof |
| WO2022037252A1 (en) * | 2020-08-18 | 2022-02-24 | 南京信息职业技术学院 | Safety monitoring apparatus for internet of things in power system |
| CN114082124A (en) * | 2021-12-01 | 2022-02-25 | 段素琴 | A built-in fire-retardant mechanism for new energy automobile |
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| CN111991735A (en) * | 2020-09-08 | 2020-11-27 | 黄族辉 | Indoor self-excitation type intelligent fire-fighting equipment |
| CN111991735B (en) * | 2020-09-08 | 2022-01-04 | 黄族辉 | Indoor self-excitation type intelligent fire-fighting equipment |
| CN113599740A (en) * | 2020-12-01 | 2021-11-05 | 黄清 | Electrical cabinet circuit protection fire prevention monitoring equipment and monitoring method thereof |
| CN114082124A (en) * | 2021-12-01 | 2022-02-25 | 段素琴 | A built-in fire-retardant mechanism for new energy automobile |
| CN114082124B (en) * | 2021-12-01 | 2022-11-11 | 广东锂华新能源科技有限公司 | A built-in fire-retardant mechanism for new energy automobile |
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