CN110337228B - Safe and environment-friendly electric power and electric cabinet and use method thereof - Google Patents
Safe and environment-friendly electric power and electric cabinet and use method thereof Download PDFInfo
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- CN110337228B CN110337228B CN201910747980.4A CN201910747980A CN110337228B CN 110337228 B CN110337228 B CN 110337228B CN 201910747980 A CN201910747980 A CN 201910747980A CN 110337228 B CN110337228 B CN 110337228B
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- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
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Abstract
The invention discloses a safe and environment-friendly electric power electrical cabinet, which comprises an electrical cabinet body, wherein an electrical element cavity is arranged on the inner side of the electrical cabinet body, a plurality of rows of electrical elements are arranged in the electrical element cavity, and a temperature sensor is arranged between every two adjacent rows of electrical elements; the electric appliance cabinet comprises an electric appliance cabinet body and is characterized in that an electric appliance cabinet door is further arranged on the front side of the electric appliance cabinet body, and a plurality of hot air outlet holes are uniformly distributed on the lower side of the door surface of the electric appliance cabinet door in a rectangular array; each hot air outlet is communicated with the lower end of the electric appliance element cavity; the invention has simple structure, can block the air channel for forced heat dissipation after ignition, and has the effect of blocking oxygen supply.
Description
Technical Field
The invention belongs to the field of electric appliance cabinets.
Background
The active heat dissipation mainly comprises the steps that external air is continuously sent into the electric cabinet in a positive pressure (or negative pressure) mode through a fan, hot air in the electric cabinet is forced to be extruded (or extracted) through an air outlet hole, and then the effect of rapid heat dissipation is achieved, and the electric cabinet is suitable for being used in a high-power electric cabinet;
however, if the high-power electrical cabinet is internally combusted due to a short circuit or other reasons, the active air supply (or negative pressure fan) mode can continuously supply fresh oxygen into the electrical cabinet, so as to promote the progress of fire.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a safe and environment-friendly electric power cabinet and a using method thereof.
The technical scheme is as follows: in order to achieve the purpose, the safe and environment-friendly electric power electrical cabinet comprises an electrical cabinet body, wherein an electrical element cavity is arranged on the inner side of the electrical cabinet body, a plurality of rows of electrical elements are arranged in the electrical element cavity, and a temperature sensor is arranged between every two adjacent rows of electrical elements; the electric appliance cabinet comprises an electric appliance cabinet body and is characterized in that an electric appliance cabinet door is further arranged on the front side of the electric appliance cabinet body, and a plurality of hot air outlet holes are uniformly distributed on the lower side of the door surface of the electric appliance cabinet door in a rectangular array; each hot air outlet is communicated with the lower end of the electric appliance element cavity;
the outer side of the electric appliance cabinet body is also provided with a positive pressure air supply axial flow fan, and the positive pressure air supply axial flow fan can send external air into the top end of the electric appliance element cavity in a positive pressure mode; a fire-fighting cabinet is installed on one side of the electric appliance cabinet body, and a tank-type carbon dioxide fire extinguisher is installed in the fire-fighting cabinet; and after any temperature sensor detects that the temperature of the electric appliance element cavity reaches a fire extinguishing threshold value, the carbon dioxide fire extinguisher can be started.
Furthermore, a horizontal air guide partition plate is arranged at the upper end of the electric appliance element cavity, an airtight air storage chamber is arranged at the upper side of the air guide partition plate, a plurality of air guide holes are uniformly distributed and hollowed in a rectangular array on the air guide partition plate, and the air storage chamber is communicated with the electric appliance element cavity through the air guide holes;
the upper part of the electric appliance cabinet body also comprises a transverse first air duct, the first air duct is fixedly connected with the fire-fighting cabinet through a vertical support column, and the air outlet end of the positive pressure air supply axial flow fan is communicated with the air inlet end of the first air duct; the air inlet end of the second air duct is communicated with the air outlet end of the first air duct through a conical transition pipe, and the inner diameter of the first air duct is larger than that of the second air duct; the air outlet end of the second air duct is communicated with the upper end of the air storage chamber through an air guide bent pipe; and the positive pressure air supply axial flow fan can be started to enable positive pressure to be formed in the air storage chamber.
The fire extinguishing system further comprises a carbon dioxide fire extinguishing agent supply pipe, a first fire extinguishing agent shunt pipe and a second fire extinguishing agent shunt pipe, wherein the first fire extinguishing agent shunt pipe is coaxial with the cylinder of the first air cylinder; the second fire extinguishing agent flow dividing pipe is coaxial with the inside of the second air duct, and the carbon dioxide fire extinguishing agent supply pipe is vertically arranged on the lower side of the conical transition pipe;
a tee joint is arranged in the pipe of the conical transition pipe, the upper end of the carbon dioxide fire extinguishing agent supply pipe is communicated with a first through of the tee joint, the right end of the first fire extinguishing agent shunt pipe is communicated with a second through of the tee joint, and the left end of the second fire extinguishing agent shunt pipe is communicated with a third through of the tee joint; the lower end of the carbon dioxide fire extinguishing agent supply pipe is communicated with a carbon dioxide fire extinguishing agent leading-out end of the tank-type carbon dioxide fire extinguisher, and an electromagnetic valve is arranged on the carbon dioxide fire extinguishing agent supply pipe; a fire extinguishing agent guiding elbow is arranged in the air guide elbow, the leading-in end of the fire extinguishing agent guiding elbow is communicated with the right end of the second fire extinguishing agent flow dividing pipe, and the leading-out end of the fire extinguishing agent guiding elbow extends downwards into the air storage cavity; a circular air blocking disc is arranged in the middle of the air guide partition plate and is positioned right below the guide-out end; the carbon dioxide jet flow sprayed out of the leading-out end is dispersed in the gas storage chamber through the gas baffle disc;
an air guide straight channel is formed between the inner wall of the second air duct and the outer wall of the second fire extinguishing agent shunt pipe; a wind guide bend is formed between the outer wall of the fire extinguishing agent guiding elbow and the inner wall of the wind guide elbow, the right end of the wind guide straight channel is communicated with the wind inlet end of the wind guide elbow, and the wind outlet end of the wind guide elbow is downwards communicated with the upper end of the gas storage chamber; and a pressure reducing valve is arranged in the second fire extinguishing agent shunt pipe.
Furthermore, the left end of the first fire extinguishing agent flow dividing pipe is coaxially and fixedly connected with a disc body, the edge of the left side outline of the disc body is integrally provided with a first annular wall, a right filtering ring disc is coaxially and fixedly arranged between the first annular wall and the inner wall of the first air duct, and a plurality of dust filtering holes are uniformly distributed in the right filtering ring disc;
a support column is coaxially arranged at the left end in the first air duct, and is fixedly connected with the inner wall of the first air duct through a support; the left end of the supporting column supports and is connected with a motor of the positive pressure air supply axial flow fan, an output shaft of the motor is connected with an axial flow fan blade, and the motor drives the axial flow fan blade to rotate through the output shaft; the right end of the supporting column is coaxially connected with a conical drainage cone, and the tip of the drainage cone is coaxially arranged towards the left; a second annular wall is integrally arranged at the outline edge of the right end of the drainage cone; a left filtering ring disc is coaxially and fixedly arranged between the second ring wall and the inner wall of the first air duct, and a plurality of dust filtering holes are uniformly distributed in the left filtering ring disc;
the left side of the left filtering ring disc is provided with an air inlet cavity, the right side of the right filtering ring disc is provided with an air outlet cavity, and an air bag expansion cavity is formed between the left filtering ring disc and the right filtering ring disc;
a cylindrical elastic expansion air bag is coaxially arranged in the air bag expansion cavity, the left end contour of the elastic expansion air bag is fixedly and hermetically connected with the inner wall of the second annular wall, and the right end contour of the elastic expansion air bag is fixedly and hermetically connected with the inner wall of the first annular wall; the inside of elasticity inflation gasbag is inclosed gasbag chamber, the carbon dioxide outlet of leading of first fire extinguishing agent shunt tubes left end intercommunication the gasbag chamber, can expand to filling whole gasbag inflation chamber after the gasbag intracavity is aerifyd by first fire extinguishing agent shunt tubes.
Further, a safe and environment-friendly working method for automatic cooling and automatic fire extinguishing of an electric power cabinet is characterized in that:
forced cooling process in the working state process of the electrical cabinet:
all the electric devices can emit heat in the working state of the electric cabinet, so that the temperature in the element cavity of the electric device is raised, the positive pressure air supply axial flow fan is started, thereby forming continuous positive pressure in the air inlet cavity, leading the air in the air inlet cavity to sequentially pass through the left filtering ring disc, the air bag expansion cavity, the right filtering ring disc, the air outlet cavity, the air guide straight channel and the air guide bend under the action of the positive pressure air supply axial flow fan, finally leading the positive pressure air into the air storage cavity through the air guide bend, so that continuous pressure-accumulating gas is formed in the gas-accumulating chamber, and the pressure-accumulating air in the gas-accumulating chamber is uniformly introduced into the cavity of the electrical component through a plurality of air-guide holes, because the upper end of the electric element cavity is continuously led in relatively cold air, hot air generated by the heat effect of the electric element in the electric element cavity is continuously led out through the hot air outlet hole, and the effect of forced heat dissipation is further realized; the left filter ring disc and the right filter ring disc can also effectively prevent large-particle dust from entering the cavity of the electric appliance element;
the working process of automatic fire extinguishing, oxygen supply channel blocking and oxygen-free state maintenance of the electrical cabinet;
in the working state process of the electrical cabinet, if the emergency of cabinet type fire disasters such as excessive thermal load, short circuit, accidental spontaneous combustion of components and the like occurs, when any temperature sensor detects that the temperature of an electrical component cavity reaches a fire extinguishing threshold value, the controller starts the electromagnetic valve to switch the carbon dioxide fire extinguishing agent supply pipe from a closed state to a unblocked state, at the moment, carbon dioxide in the tank type carbon dioxide fire extinguisher rapidly gushes out through the carbon dioxide fire extinguishing agent supply pipe, and then low-temperature carbon dioxide gushed out from the carbon dioxide fire extinguishing agent supply pipe is respectively distributed to the first fire extinguishing agent distribution pipe and the second fire extinguishing agent distribution pipe at the tee joint;
because the pressure reducing valve is arranged on the second fire extinguishing agent shunt pipe, stable and enough pressure can be generated in the first fire extinguishing agent shunt pipe, and then carbon dioxide with enough pressure for the expansion of the air bag is led into the air bag cavity through the carbon dioxide outlet of the first fire extinguishing agent shunt pipe, so that the elastic air bag can expand to fill the whole air bag expansion cavity after being inflated by the first fire extinguishing agent shunt pipe, and the left filter ring disc and the right filter ring disc also play a role in restraining the elastic air bag and preventing continuous expansion and explosion; after the elastic air bag is expanded to fill the whole air bag expansion cavity, a channel between the air inlet cavity and the air outlet cavity is blocked by the expanded elastic air bag, and at the moment, even if the positive pressure air supply axial flow fan is still in a running state, air cannot be continuously introduced into the electric appliance element cavity, so that a forced air supply process for instantly blocking the electric appliance element cavity, namely a process for blocking an oxygen source is started;
the carbon dioxide rushing into the second fire extinguishing agent shunt pipe is decompressed by the decompression valve and then enters the fire extinguishing agent guiding elbow, the carbon dioxide in the fire extinguishing agent guiding elbow is downwards sprayed to the air blocking disc in a jet flow mode through the guiding end, the air blocking disc disperses the carbon dioxide jet flow in the air storage chamber, and then the low-temperature carbon dioxide gas generating pressure storage in the air storage chamber uniformly downwards gushes into the electric appliance cavity through a plurality of air guide holes, so that the upper end of the electric appliance cavity is continuously flushed with the low-temperature carbon dioxide, and then the oxygen and the air in the air storage cavity are continuously guided out through the hot air guide hole until the gas in the electric appliance cavity is completely carbon dioxide, thereby blocking the oxygen supply link of combustion, the combustion process is automatically finished, and the cabinet is very likely to be re-combusted before the fault is eliminated due to electric fire, therefore, the oxygen-free state in the cavity of the electrical component needs to be continuously maintained before the arrival of the worker, the carbon dioxide is continuously supplemented in the cavity of the electrical component, so that the cavity of the electrical component is in a continuous positive pressure state, and at the moment, the hot air outlet continuously discharges the carbon dioxide outwards, thereby effectively preventing oxygen from being introduced into the cavity of the electrical component through the hot air outlet again; until the staff arrives at the site.
Has the advantages that: the invention has simple structure, can block the air channel for forced heat dissipation after ignition, and has the effect of blocking oxygen supply; the elastic air bag is inflated by the first fire extinguishing agent shunt pipe and then expanded to fill the whole air bag expansion cavity, and the left filtering ring disc and the right filtering ring disc play a role in restraining the elastic air bag and preventing continuous expansion and explosion; after the elastic air bag expands to fill the whole air bag expansion cavity, the channel between the air inlet cavity and the air outlet cavity is blocked by the expanded elastic air bag, and at the moment, even if the positive pressure air supply axial flow fan is still in a running state, air cannot be continuously introduced into the electric appliance element cavity, so that the forced air supply process of instantly blocking the electric appliance element cavity, namely the process of blocking the oxygen source is started.
Drawings
FIG. 1 is a first schematic view of the overall structure of the apparatus;
FIG. 2 is a second schematic view of the overall construction of the apparatus;
FIG. 3 is a schematic perspective cut-away view of the device;
fig. 4 is a first cut-away view of the first air duct (the elastic bladder is in an unexpanded state);
fig. 5 is a second cut-away view of the first air duct (with the resilient bladder in an unexpanded state);
fig. 6 is a third cut-away view of the first air duct (elastic bladder inflated state);
fig. 7 is a fourth cut-away view of the first air duct (elastic bladder inflated state).
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The structure of the scheme is introduced as shown in the accompanying drawings 1 to 7, and the safety environment-friendly electric power electrical cabinet comprises an electrical cabinet body 10, wherein an electrical element cavity 39 is formed in the inner side of the electrical cabinet body 10, a plurality of rows of electrical elements 40 are installed in the electrical element cavity 39, and a temperature sensor 41 is installed between every two adjacent rows of electrical elements 40; an electric appliance cabinet door 8 is further arranged on the front side of the electric appliance cabinet body 10, and a plurality of hot air outlet holes 9 are uniformly distributed on the lower side of the door surface of the electric appliance cabinet door 8 in a rectangular array; each hot air outlet 9 is communicated with the lower end of the electrical component cavity 39;
the outer side of the electric appliance cabinet body 10 is also provided with a positive pressure air supply axial flow fan 1, and the positive pressure air supply axial flow fan 1 can send external air into the top end of the electric appliance element cavity 39 in a positive pressure mode; a fire-fighting cabinet 7 is installed on one side of the electric appliance cabinet body 10, and a tank-type carbon dioxide fire extinguisher 32 is installed in the fire-fighting cabinet 7; any temperature sensor 41 detects that the temperature of the electrical component chamber 39 reaches a fire extinguishing threshold and activates the carbon dioxide fire extinguisher 32.
A horizontal air guide partition plate 38 is arranged at the upper end of the electrical component cavity 39, a closed air storage chamber 36 is arranged at the upper side of the air guide partition plate 38, a plurality of air guide holes 37 are uniformly distributed and hollowed in a rectangular array on the air guide partition plate 38, and the air storage chamber 36 is communicated with the electrical component cavity 39 through the air guide holes 37;
the electric appliance cabinet body 10 is characterized by further comprising a transverse first air duct 2, the first air duct 2 is fixedly connected with the fire-fighting cabinet 7 through a vertical support column 5, and an air outlet end of the positive pressure air supply axial flow fan 1 is communicated with an air inlet end of the first air duct 2; the air inlet end of the second air duct 4 is communicated with the air outlet end of the first air duct 2 through a conical transition pipe 01, and the inner diameter of the first air duct 2 is larger than that of the second air duct 4; the air outlet end of the second air duct 4 is communicated with the upper end of the air storage chamber 36 through an air guide bent pipe 04; the positive pressure air supply axial flow fan 1 is started to enable positive pressure to be formed in the air accumulation chamber 36.
The fire extinguishing agent distributor also comprises a carbon dioxide fire extinguishing agent supply pipe 3, a first fire extinguishing agent shunt pipe 17 and a second fire extinguishing agent shunt pipe 18, wherein the first fire extinguishing agent shunt pipe 17 is coaxial with the inside of the first air duct 2; the second fire extinguishing agent shunt pipe 18 is coaxial with the inside of the second air duct 4, and the carbon dioxide fire extinguishing agent supply pipe 3 is vertically arranged at the lower side of the conical transition pipe 01;
a tee joint 06 is arranged in the pipe of the conical transition pipe 01, the upper end of the carbon dioxide fire extinguishing agent supply pipe 3 is communicated with a first passage of the tee joint 06, the right end of the first fire extinguishing agent shunt pipe 17 is communicated with a second passage of the tee joint 06, and the left end of the second fire extinguishing agent shunt pipe 18 is communicated with a third passage of the tee joint 06; the lower end of the carbon dioxide fire extinguishing agent supply pipe 3 is communicated with a carbon dioxide fire extinguishing agent leading-out end of the tank-type carbon dioxide fire extinguisher 32, and an electromagnetic valve 6 is arranged on the carbon dioxide fire extinguishing agent supply pipe 3; a fire extinguishing agent guiding-out elbow 18.1 is arranged in the air guiding elbow 04, the leading-in end of the fire extinguishing agent guiding-out elbow 18.1 is communicated with the right end of the second fire extinguishing agent flow dividing pipe 18, and the leading-out end 35 of the fire extinguishing agent guiding-out elbow 18.1 extends downwards into the air storage chamber 36; a circular air blocking disc 34 is arranged in the middle of the air guide partition plate 38, and the air blocking disc 34 is positioned right below the guide-out end 35; the carbon dioxide jet ejected from the outlet end 35 is dispersed in the gas accumulation chamber 36 through the gas blocking disk 34;
an air guide straight channel 19 is formed between the inner wall of the second air duct 4 and the outer wall of the second fire extinguishing agent shunt pipe 18; an air guide bend 19.1 is formed between the outer wall of the fire extinguishing agent guiding elbow 18.1 and the inner wall of the air guide elbow 04, the right end of the air guide straight channel 19 is communicated with the air inlet end of the air guide elbow 04, and the air outlet end of the air guide elbow 04 is downwards communicated with the upper end of the air storage chamber 36; a pressure reducing valve 31 is arranged in the second fire extinguishing agent shunt pipe 18.
The left end of the first fire extinguishing agent shunt pipe 17 is coaxially and fixedly connected with a disc body 15, the edge of the left side outline of the disc body 15 is integrally provided with a first annular wall 14, a right filtering ring disc 28 is coaxially and fixedly arranged between the first annular wall 14 and the inner wall of the first air duct 2, and a plurality of dust filtering holes are uniformly distributed in the right filtering ring disc 28;
a support pillar 10 is coaxially arranged at the left end in the first air duct 2, and the support pillar 10 is fixedly connected with the inner wall of the first air duct 2 through a support 23; the left end of the supporting column 10 is connected with a motor 22 of the positive pressure air supply axial flow fan 1 in a supporting mode, an output shaft 21 of the motor 22 is connected with an axial flow fan blade 20, and the motor 22 drives the axial flow fan blade 20 to rotate through the output shaft 21; the right end of the supporting column 10 is coaxially connected with a conical drainage cone 24, and the tip of the drainage cone 24 is coaxially arranged towards the left; the right end contour edge of the drainage cone 24 is integrally provided with a second annular wall 26; a left filtering ring disc 25 is coaxially and fixedly arranged between the second annular wall 26 and the inner wall of the first air duct 2, and a plurality of dust filtering holes are uniformly distributed in the left filtering ring disc 25;
the left side of the left filtering ring disc 25 is provided with an air inlet cavity 11, the right side of the right filtering ring disc 28 is provided with an air outlet cavity 29, and an air bag expansion cavity 13 is formed between the left filtering ring disc 25 and the right filtering ring disc 28;
a cylindrical elastic expansion air bag 27 is coaxially arranged in the air bag expansion cavity 13, the left end contour of the elastic expansion air bag 27 is fixedly and hermetically connected with the inner wall of the second annular wall 26, and the right end contour of the elastic expansion air bag 27 is fixedly and hermetically connected with the inner wall of the first annular wall 14; the inside of elasticity inflation gasbag 27 is inclosed gasbag chamber 12, the carbon dioxide delivery port 16 intercommunication of first fire extinguishing agent shunt tubes 17 left end gasbag chamber 12, can expand to filling whole gasbag inflation chamber 13 after being aerifyd by first fire extinguishing agent shunt tubes 17 in the gasbag chamber 12.
The working method and the technical principle of the automatic cooling and automatic fire extinguishing of the electrical cabinet in the scheme are as follows:
forced cooling process in the working state process of the electrical cabinet:
during the working state of the electrical cabinet, all electrical devices 40 emit heat, so that the temperature in the electrical device cavity 39 is raised, the positive pressure air supply axial flow fan 1 is started, so that continuous positive pressure is formed in the air inlet cavity 11, further, air in the air inlet cavity 11 sequentially passes through the left filter ring disc 25, the air bag expansion cavity 13, the right filter ring disc 28, the air outlet cavity 29, the air guide straight channel 19 and the air guide bent channel 19.1 under the action of the positive pressure air supply axial flow fan 1, finally, the air guide bent channel 19.1 guides the positive pressure air into the air storage cavity 36, further, continuous pressure storage gas is formed in the air storage cavity 36, further, the pressure storage air in the air storage cavity 36 is uniformly guided into the electrical device cavity 39 downwards through the plurality of air guide holes 37, and because relative cold air is continuously guided into the upper end of the electrical device cavity 39, further, hot air generated due to the heat effect in the electrical device cavity 39 is continuously guided out through the hot air guide, thereby realizing the effect of forced heat dissipation; the left filter ring disc 25 and the right filter ring disc 28 can also effectively prevent large-particle dust from entering the electric appliance element cavity 39;
the working process of automatic fire extinguishing, oxygen supply channel blocking and oxygen-free state maintenance of the electrical cabinet;
in the working state of the electrical cabinet, if the emergency of cabinet type fire disasters such as excessive thermal load, short circuit, accidental spontaneous combustion of components and the like occurs, when any temperature sensor 41 detects that the temperature of the electrical component cavity 39 reaches a fire extinguishing threshold, the controller starts the electromagnetic valve 6 to switch the carbon dioxide fire extinguishing agent supply pipe 3 from a closed state to a unblocked state, at the moment, carbon dioxide in the tank-type carbon dioxide fire extinguisher 32 rapidly gushes out through the carbon dioxide fire extinguishing agent supply pipe 3, and then low-temperature carbon dioxide gushed out from the carbon dioxide fire extinguishing agent supply pipe 3 is respectively shunted to the first fire extinguishing agent shunt pipe 17 and the second fire extinguishing agent shunt pipe 18 at the tee joint 06;
because the second fire extinguishing agent shunt pipe 18 is provided with the pressure reducing valve 31, stable and enough pressure can be generated in the first fire extinguishing agent shunt pipe 17, and then the first fire extinguishing agent shunt pipe 17 introduces carbon dioxide with enough pressure to the airbag expansion into the airbag cavity 12 through the carbon dioxide outlet 16, so that the elastic airbag 27 is inflated by the first fire extinguishing agent shunt pipe 17 and then expanded to fill the whole airbag expansion cavity 13, and the left filter ring disc 25 and the right filter ring disc 28 also play a role in restraining the elastic airbag 27 and preventing continuous expansion and explosion; after the elastic air bag 27 is expanded to fill the whole air bag expansion cavity 13, the channel between the air inlet cavity 11 and the air outlet cavity 29 is blocked by the expanded elastic air bag 27, at this time, even if the positive pressure air supply axial flow fan 1 is still in a running state, air cannot be continuously introduced into the electric appliance element cavity 39, and a forced air supply process for instantly blocking the electric appliance element cavity 39, namely a process for blocking an oxygen source is started;
the carbon dioxide flowing into the second fire extinguishing agent shunt pipe 18 is decompressed by the decompression valve 31 and enters the fire extinguishing agent guiding elbow 18.1, then the carbon dioxide in the fire extinguishing agent guiding elbow 18.1 is downwards sprayed to the air blocking disc 34 in a jet flow mode through the guiding end 35, then the air blocking disc 34 disperses the carbon dioxide jet flow in the air storage chamber 36, then the low-temperature carbon dioxide gas generating pressure accumulation in the air storage chamber 36 downwards and uniformly flows into the electric appliance element cavity 39 through the plurality of air guide holes 37, further the upper end of the electric appliance element cavity 39 is continuously flushed with the low-temperature carbon dioxide, further the oxygen and the air in the air storage chamber 36 are continuously guided out through the hot air guiding hole 9 until the gas in the electric appliance element cavity 39 is completely carbon dioxide, and further the oxygen supply link of combustion is blocked, the combustion process is automatically ended, and due to electric fire, the interior of the cabinet is very likely to be re-combusted before the fault is eliminated, therefore, the oxygen-free state in the electrical component cavity 39 needs to be maintained before the staff arrives, and the carbon dioxide is still continuously supplemented in the electrical component cavity 39, so that the electrical component cavity 39 is in a continuous positive pressure state, and at this time, the hot air outlet 9 continuously discharges the carbon dioxide outwards, thereby effectively preventing oxygen from being introduced into the electrical component cavity 39 again through the hot air outlet 9; until the staff arrives at the site.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. The utility model provides a safe environment-friendly electric power regulator cubicle which characterized in that: the electric appliance cabinet comprises an electric appliance cabinet body (10), wherein an electric appliance element cavity (39) is formed in the inner side of the electric appliance cabinet body (10), a plurality of rows of electric appliance elements (40) are installed in the electric appliance element cavity (39), and a temperature sensor (41) is installed between every two adjacent rows of electric appliance elements (40); an electric appliance cabinet door (8) is further arranged on the front side of the electric appliance cabinet body (10), and a plurality of hot air outlet holes (9) are uniformly distributed on the lower side of the door surface of the electric appliance cabinet door (8) in a rectangular array; each hot air outlet hole (9) is communicated with the lower end of the electrical element cavity (39);
the outer side of the electric appliance cabinet body (10) is also provided with a positive pressure air supply axial flow fan (1), and the positive pressure air supply axial flow fan (1) can send external air into the top end of the electric appliance element cavity (39) in a positive pressure mode; a fire-fighting cabinet (7) is installed on one side of the electric appliance cabinet body (10), and a tank-type carbon dioxide fire extinguisher (32) is installed in the fire-fighting cabinet (7); any temperature sensor (41) can start the carbon dioxide fire extinguisher (32) after detecting that the temperature of the electrical element cavity (39) reaches a fire extinguishing threshold;
a horizontal air guide partition plate (38) is arranged at the upper end of the electric appliance element cavity (39), a closed air storage chamber (36) is arranged at the upper side of the air guide partition plate (38), a plurality of air guide holes (37) are uniformly distributed and hollowed in a rectangular array on the air guide partition plate (38), and the air storage chamber (36) is communicated with the electric appliance element cavity (39) through the air guide holes (37);
the electric appliance cabinet comprises an electric appliance cabinet body (10) and is characterized by further comprising a transverse first air duct (2), the first air duct (2) is fixedly connected with a fire-fighting cabinet (7) through a vertical support column (5), and an air outlet end of the positive-pressure air supply axial flow fan (1) is communicated with an air inlet end of the first air duct (2); the air inlet end of the second air duct (4) is communicated with the air outlet end of the first air duct (2) through a conical transition pipe (01), and the inner diameter of the first air duct (2) is larger than that of the second air duct (4); the air outlet end of the second air duct (4) is communicated with the upper end of the air storage chamber (36) through an air guide bent pipe (04); the positive pressure air supply axial flow fan (1) is started to enable positive pressure to be formed in the air storage chamber (36);
the fire extinguishing agent distributor also comprises a carbon dioxide fire extinguishing agent supply pipe (3), a first fire extinguishing agent shunt pipe (17) and a second fire extinguishing agent shunt pipe (18), wherein the first fire extinguishing agent shunt pipe (17) is coaxial with the cylinder of the first air cylinder (2); the second fire extinguishing agent shunt pipe (18) is coaxial with the inside of the second air duct (4), and the carbon dioxide fire extinguishing agent supply pipe (3) is vertically arranged on the lower side of the conical transition pipe (01);
a tee joint (06) is arranged in the conical transition pipe (01), the upper end of the carbon dioxide fire extinguishing agent supply pipe (3) is communicated with a first through of the tee joint (06), the right end of the first fire extinguishing agent shunt pipe (17) is communicated with a second through of the tee joint (06), and the left end of the second fire extinguishing agent shunt pipe (18) is communicated with a third through of the tee joint (06); the lower end of the carbon dioxide fire extinguishing agent supply pipe (3) is communicated with a carbon dioxide fire extinguishing agent leading-out end of the tank-type carbon dioxide fire extinguisher (32), and an electromagnetic valve (6) is arranged on the carbon dioxide fire extinguishing agent supply pipe (3); a fire extinguishing agent guiding-out elbow (18.1) is arranged in the air guiding elbow (04), the guiding-in end of the fire extinguishing agent guiding-out elbow (18.1) is communicated with the right end of the second fire extinguishing agent shunt pipe (18), and the guiding-out end (35) of the fire extinguishing agent guiding-out elbow (18.1) extends downwards into the air storage chamber (36); a circular air blocking disc (34) is arranged in the middle of the air guide partition plate (38), and the air blocking disc (34) is positioned right below the guide-out end (35); the carbon dioxide jet ejected from the outlet end (35) is dispersed in the gas storage chamber (36) through the gas blocking disc (34);
an air guide straight channel (19) is formed between the inner wall of the second air duct (4) and the outer wall of the second fire extinguishing agent shunt pipe (18); an air guide bent pipe (19.1) is formed between the outer wall of the fire extinguishing agent guiding bent pipe (18.1) and the inner wall of the air guide bent pipe (04), the right end of the air guide straight channel (19) is communicated with the air inlet end of the air guide bent pipe (04), and the air outlet end of the air guide bent pipe (04) is downwards communicated with the upper end of the air storage chamber (36); a pressure reducing valve (31) is arranged in the second fire extinguishing agent shunt pipe (18);
the left end of the first fire extinguishing agent shunt pipe (17) is coaxially and fixedly connected with a disc body (15), the edge of the left side outline of the disc body (15) is integrally provided with a first annular wall (14), a right filtering ring disc (28) is coaxially and fixedly arranged between the first annular wall (14) and the inner wall of the first air duct (2), and a plurality of dust filtering holes are uniformly distributed in the right filtering ring disc (28);
a support pillar (10) is coaxially arranged at the left end in the first air duct (2), and the support pillar (10) is fixedly connected with the inner wall of the first air duct (2) through a support (23); the left end of the supporting column (10) is connected with a motor (22) of the positive pressure air supply axial flow fan (1) in a supporting mode, an output shaft (21) of the motor (22) is connected with an axial flow fan blade (20), and the motor (22) drives the axial flow fan blade (20) to rotate through the output shaft (21); the right end of the supporting column (10) is coaxially connected with a conical drainage cone (24), and the tip of the drainage cone (24) is coaxially arranged towards the left; the right end outline edge of the drainage cone (24) is integrally provided with a second annular wall (26); a left filtering ring disc (25) is coaxially and fixedly arranged between the second annular wall (26) and the inner wall of the first air duct (2), and a plurality of dust filtering holes are uniformly distributed in the left filtering ring disc (25);
an air inlet cavity (11) is formed in the left side of the left filtering ring disc (25), an air outlet cavity (29) is formed in the right side of the right filtering ring disc (28), and an air bag expansion cavity (13) is formed between the left filtering ring disc (25) and the right filtering ring disc (28);
a cylindrical elastic expansion air bag (27) is coaxially arranged in the air bag expansion cavity (13), the left end profile of the elastic expansion air bag (27) is fixedly and hermetically connected with the inner wall of the second annular wall (26), and the right end profile of the elastic expansion air bag (27) is fixedly and hermetically connected with the inner wall of the first annular wall (14); the inside of elasticity inflation gasbag (27) is inclosed gasbag chamber (12), carbon dioxide outlet (16) intercommunication of first fire extinguishing agent shunt tubes (17) left end gasbag chamber (12), can expand to filling whole gasbag inflation chamber (13) in gasbag chamber (12) after being aerifyd by first fire extinguishing agent shunt tubes (17).
2. The working method of automatic cooling and automatic fire extinguishing of the safety and environment-friendly electric power cabinet according to claim 1 is characterized in that:
forced cooling process in the working state process of the electrical cabinet:
during the working state of the electrical cabinet, all electrical devices (40) emit heat, so that the temperature in an electrical device cavity (39) is raised, a positive pressure air supply axial flow fan (1) is started, continuous positive pressure is formed in an air inlet cavity (11), air in the air inlet cavity (11) sequentially passes through a left filter ring disc (25), an air bag expansion cavity (13), a right filter ring disc (28), an air outlet cavity (29), an air guide straight channel (19) and an air guide bent channel (19.1) under the action of the positive pressure air supply axial flow fan (1), and finally the positive pressure air is guided into an air storage cavity (36) through the air guide bent channel (19.1), so that continuous pressure storage gas is formed in the air storage cavity (36), and the pressure storage air in the air storage cavity (36) is uniformly guided into the electrical device cavity (39) downwards through a plurality of air guide holes (37), and relatively cold air is continuously guided into the upper end of the electrical device cavity (39), so that the hot air generated by the heat effect of the electric device in the electric device element cavity (39) is continuously led out through the hot air outlet hole (9), thereby realizing the effect of forced heat dissipation; the left filter ring disc (25) and the right filter ring disc (28) can also effectively prevent large-particle dust from entering the electric appliance element cavity (39);
the working process of automatic fire extinguishing, oxygen supply channel blocking and oxygen-free state maintenance of the electrical cabinet;
in the working state process of the electrical cabinet, if the emergency of cabinet type fire disasters such as excessive thermal load, short circuit, accidental spontaneous combustion of components and the like occurs, after any temperature sensor (41) detects that the temperature of an electrical component cavity (39) reaches a fire extinguishing threshold value, the controller starts the electromagnetic valve (6) to enable the carbon dioxide fire extinguishing agent supply pipe (3) to be switched from a closed state to a unblocked state, at the moment, carbon dioxide in the tank type carbon dioxide fire extinguisher (32) rapidly gushes out through the carbon dioxide fire extinguishing agent supply pipe (3), and then low-temperature carbon dioxide gushing out from the carbon dioxide fire extinguishing agent supply pipe (3) is respectively shunted to the first fire extinguishing agent shunt pipe (17) and the second fire extinguishing agent shunt pipe (18) at the tee joint (06);
because the second fire extinguishing agent shunt pipe (18) is provided with the pressure reducing valve (31), stable and enough pressure can be generated in the first fire extinguishing agent shunt pipe (17), and then the first fire extinguishing agent shunt pipe (17) introduces carbon dioxide with enough pressure to the air bag cavity (12) through the carbon dioxide leading-out port (16), so that the elastic air bag (27) is inflated by the first fire extinguishing agent shunt pipe (17) and then expanded to fill the whole air bag expansion cavity (13), and the left filtering ring disc (25) and the right filtering ring disc (28) also play roles of elastically restraining the air bag (27) and preventing continuous expansion and explosion; after the elastic air bag (27) is expanded to fill the whole air bag expansion cavity (13), a channel between the air inlet cavity (11) and the air outlet cavity (29) is blocked by the expanded elastic air bag (27), even if the positive pressure air supply axial flow fan (1) is still in a running state, air cannot be continuously introduced into the electric appliance element cavity (39), and a forced air supply process for instantly blocking the electric appliance element cavity (39), namely a process for blocking an oxygen source is started;
carbon dioxide rushing into the second fire extinguishing agent shunt pipe (18) is decompressed by the decompression valve (31) and then enters the fire extinguishing agent guiding elbow pipe (18.1), then the carbon dioxide in the fire extinguishing agent guiding elbow pipe (18.1) is downwards sprayed to the air blocking disc (34) in a jet flow mode through the guiding end (35), then the air blocking disc (34) disperses the carbon dioxide jet flow in the air storage chamber (36), and further low-temperature carbon dioxide gas generated by pressure storage in the air storage chamber (36) downwards and uniformly rushes into the electric appliance element cavity (39) through the plurality of air guide holes (37), so that the upper end of the electric appliance element cavity (39) has continuous low-temperature carbon dioxide rushing in, further oxygen and air in the air storage chamber (36) are continuously guided out through the hot air guiding hole (9) until the gas in the electric appliance element cavity (39) is completely carbon dioxide, and further the oxygen supply link of combustion is blocked, the combustion process is automatically ended, because the electric fire is caught, the cabinet is very likely to be combusted again before the fault is not eliminated, so that the oxygen-free state in the electric appliance element cavity (39) needs to be continuously maintained before the arrival of the working personnel, carbon dioxide is continuously supplemented in the electric appliance element cavity (39), the electric appliance element cavity (39) is in a continuous positive pressure state, at the moment, the hot air outlet (9) continuously discharges the carbon dioxide outwards, and oxygen is effectively prevented from being introduced into the electric appliance element cavity (39) again through the hot air outlet (9).
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| CN112797542B (en) * | 2021-01-04 | 2022-12-02 | 珠海格力电器股份有限公司 | Fire extinguishing device, control method and air conditioner |
| CN113382610B (en) * | 2021-06-18 | 2022-04-19 | 武汉铁路职业技术学院 | Automatic electrical control cabinet of electric locomotive and working method |
| CN113346369B (en) * | 2021-06-18 | 2024-03-26 | 武汉铁路职业技术学院 | Emergency flame-retardant electrical cabinet for rail transit vehicle and working method thereof |
| CN113795107B (en) * | 2021-09-17 | 2023-05-26 | 箭和自动化工程江苏有限公司 | Control cabinet based on industrial automation control instrument system and control method |
| CN113809650B (en) * | 2021-11-19 | 2022-04-12 | 山东科技职业学院 | Intelligent fireproof distribution box |
| CN114156742B (en) * | 2021-11-30 | 2024-01-09 | 国网江苏省电力有限公司灌云县供电分公司 | Heat dissipation power equipment for power engineering |
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Effective date of registration: 20201216 Address after: No. 683, Tongren Road, Tongxiang Economic Development Zone, Tongxiang City, Jiaxing City, Zhejiang Province, 314500 Applicant after: Zhejiang Maofeng Electric Co.,Ltd. Address before: 226600 Wangnan Group 8, Huji Town, Hai'an County, Nantong City, Jiangsu Province Applicant before: Lu Lindi |
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