CN112838507B - High-low voltage switch cabinet of fire prevention explosion-proof type - Google Patents
High-low voltage switch cabinet of fire prevention explosion-proof type Download PDFInfo
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- CN112838507B CN112838507B CN202110334865.1A CN202110334865A CN112838507B CN 112838507 B CN112838507 B CN 112838507B CN 202110334865 A CN202110334865 A CN 202110334865A CN 112838507 B CN112838507 B CN 112838507B
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- 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
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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- 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
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- 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
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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Abstract
The invention belongs to the technical field of high-low voltage switch cabinets, and particularly relates to a fireproof and explosion-proof high-low voltage switch cabinet which comprises a main body, wherein a top plate is fixedly arranged above the main body; a bottom plate is fixedly arranged below the main body; a cabinet door is hinged on the main body; the inner wall of the main body is fixedly provided with an installation plate; the mounting plate is fixedly provided with an electric element; the side wall of the main body is provided with a pressure relief hole; a sealing plug is fixedly arranged in the pressure relief hole; a first spring is fixedly arranged on the inner wall of the main body; a movable plate is fixedly arranged on the first spring; the movable plate is fixedly provided with pressure relief pipes, and the pressure relief pipes correspond to the pressure relief holes one by one; the invention has simple structure and low production cost, and the produced switch cabinet has good fireproof and explosion-proof performance and good heat dispersion performance.
Description
Technical Field
The invention belongs to the technical field of high-low voltage switch cabinets, and particularly relates to a fireproof and explosion-proof high-low voltage switch cabinet.
Background
The high-low voltage switch cabinet is a device for connecting high-voltage or low-voltage cables as the name implies, a high-voltage cabinet is used by a common power supply station and a substation, the high-voltage cabinet is subjected to voltage reduction by a transformer and then enters a low-voltage cabinet, the low-voltage cabinet enters each power distribution box, and protective devices such as switch breakers and the like are assembled into an integrated electrical device without the inside.
At present, with the continuous progress of science and technology and the improvement of people's understanding of safe electricity utilization, the fireproof and explosion-proof high-low voltage switch cabinet appears in the vision of people, the safety degree of electricity utilization is effectively improved, however, in the use process, the existing fireproof and explosion-proof high-low voltage switch cabinet emphasizes the fireproof and explosion-proof performance, so that the sealing performance is improved, the heat dissipation effect is poor, the heat generated by the electrical elements in the box body during working cannot be dissipated in time, the normal work of the electrical elements in the high-low voltage switch cabinet is seriously influenced, the service life of the electrical elements in the high-low voltage switch cabinet is shortened, meanwhile, in the prior art, a fan is generally installed on the conventional switch cabinet for heat dissipation, but the conventional heat dissipation mode is too simple, impurities easily enter the switch cabinet through the fan to block the electrical equipment, and the heat dissipation effect of the electrical equipment is influenced, the use effect is not ideal.
Some technical solutions also exist in the prior art, such as chinese patent with application number CN201520851031.8, including a switch cabinet top plate and a pressure relief cover plate, where the switch cabinet top plate is installed on a switch cabinet, a pressure relief opening is formed on the switch cabinet top plate, and the pressure relief cover plate is arranged on the switch cabinet top plate and covers the pressure relief opening; pressure release apron one side is passed through fastener locking on the cubical switchboard roof, pressure release apron opposite side passes through the plastics fastener setting on the cubical switchboard roof a plurality of slotted holes that are sharp range are evenly seted up to one side that just is close to the fastener on the pressure release apron, however, the pressure release apron in this scheme is unfavorable for used repeatedly, and also do not benefit to at the normal position reconversion after the pressure release apron is buckled, maintains the difficulty, simultaneously, after the pressure release apron is buckled, cabinet body inner space and external direct intercommunication, when the internal portion of cabinet had the condition of a fire, the condition of a fire will expand rapidly, increase loss.
Disclosure of Invention
In order to make up for the defects of the prior art, improve the fireproof and explosion-proof performance of the switch cabinet, ensure the normal use of the switch cabinet, improve the heat dissipation effect of the switch cabinet under the condition of not influencing the fireproof and explosion-proof performance of the switch cabinet, and prevent the service life of electrical elements in the switch cabinet from being shortened or the work from being unstable, the invention provides the fireproof and explosion-proof high-low voltage switch cabinet.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a fireproof and explosion-proof high-low voltage switch cabinet which comprises a main body, wherein a top plate is fixedly arranged above the main body; a bottom plate is fixedly arranged below the main body; a cabinet door is hinged on the main body, and the cabinet door seals a space formed by the main body, the top plate and the bottom plate; the inner wall of the main body is fixedly provided with an installation plate; the mounting plates are multiple in number and are uniformly distributed in the main body from top to bottom; the mounting plate is fixedly provided with an electric element;
the side wall of the main body is provided with a pressure relief hole; the pressure relief holes are uniformly distributed on the side walls of the left side and the right side of the main body; a sealing plug is fixedly arranged in the pressure relief hole in an interference fit mode; when the sealing plug is acted by external force, the sealing plug falls out of the switch cabinet from the pressure relief hole;
a first spring is fixedly arranged on the inner wall of the main body; the springs are divided into two groups and are respectively positioned on the inner walls of the left side and the right side of the main body; a movable plate is fixedly arranged at one end of the first spring, which is far away from the inner wall of the main body; the side surface of the movable plate is just contacted with the inner wall of the main body; after the cabinet door is closed, the side face of the movable plate is just contacted with the side face of the cabinet door facing the inside of the main body; when the movable plate is not acted by external force, the mounting plate is just contacted with the movable plate; when the movable plate is acted by external force, the movable plate moves towards the inner wall direction of the main body; the movable plate is fixedly provided with a pressure relief pipe, and the pressure relief pipe is positioned between the movable plate and the inner wall of the main body; the pressure relief pipes are multiple in number and correspond to the pressure relief holes one by one;
when the switch cabinet is in use, when the switch cabinet breaks down and an arcing accident occurs in the switch cabinet, because the voltage of the electric elements in the switch cabinet is high and the current is large, the arcing in the switch cabinet releases huge energy in a short time, so that high-temperature and high-pressure gas is generated in the switch cabinet, because the communication gap between the switch cabinet and the external environment is small, the pressure can not be released in a short time, the pressure in the switch cabinet rises rapidly, meanwhile, because the movable plate is just contacted with the inner wall of the main body, and the gap between the movable plate and the inner wall of the main body is small, a large amount of gas can not pass in a short time, when the switch cabinet breaks down and high-temperature and high-pressure gas is generated inside, the pressure in the space between the movable plate and the inner wall of the main body is relatively small, and the movable plate is extruded and pushed by the high-temperature and high-pressure gas in the switch cabinet, thereby make the fly leaf remove towards the direction of main part inner wall, and simultaneously, because fixed mounting has the pressure release pipe on the fly leaf, and seted up the pressure release hole on the lateral wall of main part, after the fly leaf takes place to remove, the sealing plug in the pressure release hole is contacted and extruded to the pressure release pipe on the fly leaf, drop until the sealing plug, and simultaneously, after the sealing plug drops, the fly leaf continues to receive the high temperature in the main part, high-pressure gas's extrusion and promotion, thereby make the pressure release pipe on the fly leaf insert in the pressure release hole, make between main part inner space and the external environment through the pressure release pipe intercommunication, and then make the high temperature in the main part, high-pressure gas passes through the pressure release pipe and releases in the external environment, reduce the pressure in the main part rapidly, prevent that the cabinet body from appearing bursting, cause bigger loss and personnel's damage.
Simultaneously, after the fault handling to the cubical switchboard was accomplished, the fly leaf in the cubical switchboard gets back to the original position under the effect of spring one, avoids the fly leaf can not reset, causes the staff to maintain the difficulty, simultaneously, after the staff picked up the sealing plug that drops in the pressure release hole and got back to the pressure release hole again, can relax with the pressure release hole reseal, avoid the pressure release hole can only single use, influence the reuse after the cubical switchboard fault maintenance.
Preferably, the inner wall of the main body is fixedly provided with an air bag; the number of the air bags is two, and the two air bags are respectively positioned on the side walls of the left side and the right side of the main body; the air bag is positioned between the pressure relief pipe and the inner wall of the main body, and the air bag is contacted with one end of the pressure relief pipe, which is far away from the movable plate; the pressure relief holes in the inner wall of the main body are covered by the air bags; the movable plate has a tendency of being pressed towards the air bag under the action of the first spring; when no air bag exists between the movable plate and the inner wall of the main body, the pressure relief pipe contacts the inner wall of the main body; the acting force of the spring on the movable plate cannot enable the pressure relief pipe to pierce the air bag;
the pressure relief pipe is uniformly provided with conveying holes, and the conveying holes are positioned at one end, close to the movable plate, of the pressure relief pipe; the air bag is filled with a dry powder extinguishing agent, and the pressure in the air bag is greater than the standard atmospheric pressure;
when the dry powder extinguishing agent spraying device works, after the movable plate moves due to the fault of the switch cabinet in the using process, the fault in the switch cabinet can usually cause the ignition of the electric elements in the switch cabinet, therefore, in the moving process of the movable plate, the pressure relief pipe arranged on the movable plate can pierce the air bag arranged between the movable plate and the inner wall of the main body, so that the dry powder extinguishing agent filled in the air bag can be sprayed out under the internal pressure and the extrusion of the movable plate, meanwhile, after the dry powder extinguishing agent is sprayed out, the pressure relief pipe can be inserted into the air bag after piercing the air bag, therefore, part of the sprayed dry powder extinguishing agent is directly sprayed out from the pressure relief pipe to the inner space of the main body, the fire condition existing on various electric elements arranged in the main body is controlled or extinguished, the loss is reduced, the later maintenance difficulty is reduced, meanwhile, because the pressure in the air bag is relatively higher, the part of the dry powder extinguishing agent sprayed out from the air bag enters between the air bag and the movable plate, the part of the dry powder extinguishing agent enters the pressure relief pipe through the delivery hole arranged on the pressure relief pipe and is finally sprayed into the main body, thereby avoiding the part of the dry powder extinguishing agent from entering a staggered position in the spraying process and being incapable of exerting the effect, reducing the control effect of the dry powder extinguishing agent filled in the air bag on the fire condition in the switch cabinet, leading to the increase of the loss of the switch cabinet after the switch cabinet breaks down, simultaneously ensuring that the dry powder extinguishing agent in the air bag is quickly sprayed and relatively uniformly covered on the electric elements in the main body by leading to the relatively higher pressure in the air bag, completing the control on the fire condition, simultaneously, in the using process, the sealing performance of the inner space of the switch cabinet can be increased to a certain extent by fixedly installing the air bag on the inner wall of the main body, preventing the direct communication between the inner aperture of the switch cabinet and the external environment through the pressure relief hole after the sealing plug in the pressure relief hole on the side wall of the main body falls off in the transportation and use process, the electric elements in the main body are influenced by the external environment, so that the service life of the electric elements is reduced.
Preferably, a magnetic ring is fixedly installed on the inner wall of the pressure relief hole; the sealing plug is fixedly arranged in the magnetic ring in an interference fit mode;
a first fixing frame is fixedly arranged in the pressure relief pipe; a one-way plate is movably mounted in the pressure relief pipe, and the distance between the one-way plate and the air bag is smaller than the distance between the first fixing frame and the air bag; the one-way plate is fixedly connected with the first fixing frame through an elastic rope; a retainer ring seat is fixedly arranged on the inner wall of the pressure relief hole; the retainer ring seat is positioned between the one-way plate and the first fixing frame; the one-way plate is tightly attached to the retainer ring seat under the action of the elastic rope; after the one-way plate is tightly attached to the retainer ring seat, the air flow flows in the pressure relief pipe in one direction towards the air bag; the unidirectional plate has magnetism, and a magnetic force action of mutual repulsion exists between the unidirectional plate and the magnetic ring;
when the movable plate is used, when the movable plate moves towards the inner wall of the main body under the action of high-temperature and high-pressure gas in the switch cabinet and is inserted into the pressure release hole through the pressure release pipe, the pressure in the switch cabinet is reduced after the pressure in the switch cabinet is released from the pressure release pipe, at the moment, the gas in the switch cabinet is not released outwards, meanwhile, under the action of fire in the switch cabinet, the trend that fresh air is sucked into the switch cabinet through the pressure release pipe to maintain combustion exists in the switch cabinet, meanwhile, after the movable plate pierces the air bag, the pressure release pipe is in mutual contact with the pressure release hole, and a mutual repulsive magnetic force action exists between the one-way plate in the pressure release pipe and the magnetic ring, so that the one-way plate is tightly attached to the retainer seat, and the damage to an elastic rope connecting the one-way plate and the fixing frame is prevented from generating when the high-temperature and high-pressure gas is released, and the action effect of the elastic rope is influenced, meanwhile, through the action of the magnetic ring, the contact tightness between the one-way plate and the retainer ring seat can be further improved, the sealing effect is improved, external fresh air is prevented from entering the inside of the main body from the pressure relief pipe, the fire condition on an electrical element in the main body is enlarged, and greater loss is caused.
Preferably, the middle position of the bottom plate is provided with an air inlet; a lower plate is fixedly arranged on the inner wall of the main body; the lower plate is positioned below the movable plate, and the lower surface of the movable plate is just contacted with the upper surface of the lower plate; the lower plate is uniformly provided with second communicating holes; the distance between the second communication hole and the air bag is larger than the distance between the movable plate and the air bag; a second spring is fixedly arranged on the lower surface of the lower plate; a second baffle is fixedly arranged at one end of the second spring, which is far away from the lower plate; the second baffle plate is opposite to the air inlet, and the diameter of the second baffle plate is larger than that of the air inlet; the second baffle plate is tightly attached to the air inlet under the action of gravity and the elasticity of the second spring;
an air outlet is formed in the middle of the top plate; an upper plate is fixedly arranged on the inner wall of the main body; the upper plate is positioned above the movable plate, and the upper surface of the movable plate is just contacted with the upper surface of the upper plate; the upper plate is uniformly provided with first communicating holes; the distance between the first communication hole and the air bag is smaller than the distance between the movable plate and the air bag;
a fan is fixedly arranged on the lower surface of the top plate and is opposite to the air outlet; a second fixing frame is fixedly arranged on the inner wall of the air outlet; a deformation plate is fixedly arranged in the middle of the upper surface of the second fixing frame; a first baffle is fixedly arranged at one end of the deformation plate far away from the second fixing frame; the deformation plate is made of memory metal, and the deformation plate deforms after the temperature of the deformation plate exceeds a deformation threshold value; after the deformation plate deforms, the baffle plate is pushed to move towards the direction far away from the fan until the first baffle plate seals the air outlet;
the movable plate is made of a metal material with good heat conducting property; the pressure relief pipe is made of a metal material with concave heat-conducting property;
during operation, when the switch cabinet does not break down and normally operates, a large amount of heat can be generated by the electric elements in the switch cabinet in the working process, and when the generated heat is accumulated in the switch cabinet, the electric elements are easily affected, so that the service life of the electric elements is shortened or the working state of the electric elements is unstable, and the normal use of the switch cabinet is affected.
Meanwhile, in the using process, the fan arranged on the top plate drives the air with higher temperature in the control cabinet to be finally discharged out of the switch cabinet from the air outlet, meanwhile, when the fan discharges the air with higher temperature in the switch cabinet to the outside, the air with lower temperature of the outside enters the switch cabinet from the air inlet on the bottom plate, the air circulation is carried out between the switch cabinet and the outside environment through the fan, the temperature in the switch cabinet is effectively reduced, the electrical elements in the switch cabinet are ensured to be in better working environment, the service life of the electrical elements is prolonged, and the stability of the working state of the electrical elements is ensured, meanwhile, in the process of driving the air circulation by the fan, because the positions of the first communication hole and the second communication hole are different, the air entering the switch cabinet firstly enters the main body from the air inlet, and then, the air passes through the pressure relief hole on the movable plate and enters the space between the movable plate and the inner wall of the main body, and is finally exhausted to the outside by the fan, in the air flowing process, the air is fully contacted with the movable plate and the pressure relief pipe, and meanwhile, the movable plate and the pressure relief pipe are both made of metal materials with good heat conductivity and are contacted with the inner walls of the main body and the mounting plate, so that the contact between the air and the movable plate and the pressure relief pipe can effectively improve the air heat exchange efficiency in the air circulation process, the heat exhaust speed in the switch cabinet is accelerated, and the stability and the suitability of the temperature in the switch cabinet are maintained.
Simultaneously, in the use, because baffle two is just to the air intake, and baffle two hugs closely in air intake department through the effect of spring two, start at the fan, and when driving the air cycle in the cubical switchboard, baffle two is pushed up by the air that the external world enters into in the cubical switchboard, guarantee the smooth and easy of air flow, and simultaneously, when the fan did not work or the cubical switchboard breaks down, baffle two seals the air intake, prevent that external insect from getting into and prevent that external fresh air from entering into in the cubical switchboard, lead to the condition of a fire in the cubical switchboard to enlarge, the loss increase.
Meanwhile, in the use process, the temperature of the deformation plate installed in the air outlet on the top plate does not exceed the deformation threshold, and the deformation plate does not deform, so that the air outlet cannot be sealed by the first baffle fixedly installed on the deformation plate, the normal air circulation in the switch cabinet is ensured, the relatively stable temperature in the switch cabinet is ensured, meanwhile, the fault occurs in the switch cabinet, the fire in the switch cabinet is caused, and after the temperature rises, because the air outlet is located at the top of the switch cabinet, high-temperature gas is firstly discharged from the air outlet, the deformation plate is caused to rapidly heat up until the temperature of the deformation plate exceeds the deformation threshold, so that the deformation plate deforms, the first baffle is pushed to move to seal the air outlet, the external fresh air is prevented from entering the switch cabinet, the fire in the switch cabinet is caused to expand, and the loss is increased.
Preferably, a space enclosed between the upper plate and the inner wall of the main body is used as a first air collecting cavity; a space enclosed between the lower plate and the inner wall of the main body is used as a second air collecting cavity; the first air collecting cavity and the second air collecting cavity are both filled with filter cotton; the filter cotton filled in the first air collecting cavity is not in contact with the fan; the filter cotton filled in the second air collecting cavity is not in contact with the second spring and the second baffle;
during operation, through filling the filter pulp in collection wind chamber one and collection wind chamber two, impurity in the air that can effectual filtration cubical switchboard and external environment between the circulation, avoid gathering the dust in the cubical switchboard, influence the normal work of the electric elements in the cubical switchboard and electric elements's heat dissipation, and simultaneously, through filling the filter pulp in collection wind chamber one and collection wind chamber two, can effectually prevent external insect, the mouse is at the cubical switchboard during operation, enter into the cubical switchboard through air intake or air outlet in, influence the life of electric elements in the cubical switchboard or lead to electric elements trouble.
Preferably, sodium bicarbonate particles are uniformly embedded in the filter cotton filled in the first air collecting cavity; the diameter of the sodium bicarbonate particles is 1.5-2.5 mm; the surfaces of the sodium bicarbonate particles are wrapped with a polytetrafluoroethylene coating;
when the switch cabinet is in work, when a fault occurs in the switch cabinet, the temperature in the switch cabinet rises, sodium bicarbonate particles embedded in filter cotton in the first air collecting cavity begin to decompose to generate carbon dioxide, and then the carbon dioxide enters the inner space of the main body to form an inert environment, further inhibit the development of fire, reduce the spreading speed of the fire or extinguish the fire, meanwhile, in the using process, because the relative mass of the carbon dioxide is larger, the sodium bicarbonate particles are placed in the first air collecting cavity, the carbon dioxide generated by decomposition can be quickly and smoothly settled in the inner space of the main body to cover the electric elements in the main body and improve the distribution uniformity of the carbon dioxide, meanwhile, in the using process, the surface of the sodium bicarbonate particles is wrapped with a polytetrafluoroethylene coating, so that the sodium bicarbonate particles can be effectively prevented from contacting with water vapor in the external environment, the hydrolysis phenomenon of the sodium bicarbonate particles is caused, the storage life of the sodium bicarbonate particles embedded in the filter cotton is shortened, and the sodium bicarbonate hydrolysis products are prevented from corroding the cabinet body of the switch cabinet and the filter cotton to influence the normal use of the switch cabinet.
The invention has the following beneficial effects:
1. according to the fireproof and explosion-proof high-low voltage switch cabinet, the movable plate, the pressure relief pipe and the pressure relief hole are arranged, when the switch cabinet breaks down and high-temperature and high-pressure gas is generated inside the switch cabinet, the movable plate is pushed to move, the pressure relief pipe is inserted into the pressure relief hole, communication between the internal space of the cabinet body and the external environment is completed, pressure in the cabinet body is released, and the switch cabinet is prevented from bursting to cause loss increase and personnel damage.
2. The fire-proof and explosion-proof high-low voltage switch cabinet of the invention can lead the dry powder extinguishing agent in the air bag to pierce the air bag in the pressure relief pipe by arranging the air bag and filling the dry powder extinguishing agent in the air bag, the pressure relief pipe is sprayed into the cabinet body to uniformly cover the electric elements in the cabinet body, thereby inhibiting the development of fire, reducing loss, meanwhile, by arranging the first air collecting cavity and the second air collecting cavity and filling the first air collecting cavity and the second air collecting cavity with filter cotton, dust and impurities entering the cabinet body in the heat dissipation process can be effectively filtered, the phenomenon that the heat dissipation of the electrical elements is influenced or the electrical elements are failed due to the accumulated impurities on the electrical elements in the cabinet body is avoided, simultaneously, through the filter pulp of filling, can effectually prevent that external insects or mice and other toy from entering into the cabinet internally, cause the destruction, influence the normal use of cubical switchboard.
3. According to the fireproof and explosion-proof high-low voltage switch cabinet, the first communication hole and the second communication hole are arranged, so that air in the switch cabinet is in full contact with the movable plate and the pressure relief pipe in the flowing process when the switch cabinet dissipates heat, the movable plate and the pressure relief pipe are used as a heat exchanger due to the fact that the movable plate and the pressure relief pipe are good in heat conductivity, the effect and efficiency of the switch cabinet in the dissipating process are improved, and the temperature in the switch cabinet is kept relatively stable.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic structural view of a switchgear of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
in the figure: the air bag type air bag comprises a main body 1, a pressure relief hole 11, a magnetic ring 111, a sealing plug 112, a first spring 12, a movable plate 13, an air bag 14, a pressure relief pipe 15, a conveying hole 151, a first fixing frame 152, an elastic rope 153, a retainer ring seat 154, a one-way plate 155, a mounting plate 16, a top plate 2, an air outlet 21, a first baffle plate 22, a second fixing frame 23, a deformation plate 24, a fan 25, an upper plate 26, a first communication hole 27, a bottom plate 3, an air inlet 31, a second baffle plate 32, a lower plate 33, a second spring 34 and a second communication hole 35.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 3, the fireproof and explosion-proof high-low voltage switch cabinet of the present invention comprises a main body 1, wherein a top plate 2 is fixedly installed above the main body 1; a bottom plate 3 is fixedly arranged below the main body 1; a cabinet door is hinged on the main body 1, and the cabinet door seals the space formed by the main body 1, the top plate 2 and the bottom plate 3; an installation plate 16 is fixedly arranged on the inner wall of the main body 1; the mounting plates 16 are distributed uniformly from top to bottom in the main body 1; the mounting plate 16 is fixedly provided with an electric element;
the side wall of the main body 1 is provided with a pressure relief hole 11; the pressure relief holes 11 are uniformly distributed on the side walls of the left side and the right side of the main body 1; a sealing plug 112 is fixedly arranged in the pressure relief hole 11 in an interference fit manner; when the sealing plug 112 is acted by external force, the sealing plug 112 falls out of the pressure relief hole 11 to the outside of the switch cabinet;
a first spring 12 is fixedly arranged on the inner wall of the main body 1; the first springs 12 are divided into two groups and are respectively positioned on the inner walls of the left side and the right side of the main body 1; a movable plate 13 is fixedly arranged at one end of the first spring 12, which is far away from the inner wall of the main body 1; the side surface of the movable plate 13 is just contacted with the inner wall of the main body 1; after the cabinet door is closed, the side surface of the movable plate 13 is just contacted with the side surface of the cabinet door facing the inside of the main body 1; when the movable plate 13 is not acted by external force, the mounting plate 16 is just contacted with the movable plate 13; when the movable plate 13 is acted by external force, the movable plate 13 moves towards the inner wall direction of the main body 1; the movable plate 13 is fixedly provided with a pressure relief pipe 15, and the pressure relief pipe 15 is positioned between the movable plate 13 and the inner wall of the main body 1; the number of the pressure relief pipes 15 is multiple, and the pressure relief pipes 15 correspond to the pressure relief holes 11 one by one;
when the gas pressure regulating switch cabinet is in use, when the switch cabinet breaks down and an arcing accident occurs in the switch cabinet, due to the fact that the voltage of electric elements in the switch cabinet is high and the current is large, the arcing occurring in the switch cabinet releases huge energy in a short time, high-temperature and high-pressure gas is generated in the switch cabinet, due to the fact that a communication gap between the switch cabinet and the external environment is small, the pressure cannot be released in a short time, the pressure in the switch cabinet rises rapidly, meanwhile, due to the fact that the movable plate 13 is just in contact with the inner wall of the main body 1, the gap between the movable plate 13 and the inner wall of the main body 1 is small, a large amount of gas cannot pass through in a short time, and therefore when the switch cabinet breaks down and high-temperature and high-pressure gas is generated internally, the pressure in the space between the movable plate 13 and the inner wall of the main body 1 is relatively small, and the movable plate 13 is subjected to the high-temperature and high-pressure in the switch cabinet, The high pressure gas is pressed and pushed, thereby moving the movable plate 13 toward the inner wall of the main body 1, and at the same time, because the pressure relief pipe 15 is fixedly arranged on the movable plate 13 and the side wall of the main body 1 is provided with the pressure relief hole 11, after the movable plate 13 moves, the pressure relief pipe 15 on the movable plate 13 contacts and presses the sealing plug 112 in the pressure relief hole 11 until the sealing plug 112 falls off, and at the same time, after the sealing plug 112 falls off, the movable plate 13 is continuously pressed and pushed by the high-temperature and high-pressure gas in the main body 1, so that the pressure relief pipe 15 on the movable plate 13 is inserted into the pressure relief hole 11, the internal space of the main body 1 is communicated with the external environment through the pressure relief pipe 15, and then make high temperature, high-pressure gas in the main part 1 release to the external environment through pressure release pipe 15 in, reduce the pressure in the main part 1 rapidly, prevent that the cabinet body from appearing bursting, cause bigger loss and personnel's damage.
Meanwhile, after the fault processing of the switch cabinet is completed, the movable plate 13 in the switch cabinet returns to the original position under the action of the first spring 12, the situation that the movable plate 13 cannot reset and the maintenance difficulty of a worker is caused is avoided, meanwhile, after the worker picks up and re-plugs the sealing plug 112 falling off in the pressure relief hole 11 into the pressure relief hole 11, the pressure relief hole 11 can be easily re-sealed, the situation that the pressure relief hole 11 can only be used once is avoided, and the reuse after the fault maintenance of the switch cabinet is influenced.
As an embodiment of the invention, an air bag 14 is fixedly arranged on the inner wall of the main body 1; the number of the air bags 14 is two, and the two air bags are respectively positioned on the side walls of the left side and the right side of the main body 1; the air bag 14 is positioned between the pressure relief pipe 15 and the inner wall of the main body 1, and the air bag 14 is in contact with one end of the pressure relief pipe 15 away from the movable plate 13; the pressure relief holes 11 on the inner wall of the main body 1 are covered by the air bags 14; the movable plate 13 has a tendency to be pressed towards the air bag 14 under the action of the first spring 12; when the air bag 14 is not arranged between the movable plate 13 and the inner wall of the main body 1, the pressure relief pipe 15 is contacted with the inner wall of the main body 1; the acting force of the first spring 12 on the movable plate 13 cannot enable the pressure relief pipe 15 to pierce the air bag 14;
the pressure relief pipe 15 is uniformly provided with conveying holes 151, and the conveying holes 151 are located at one end, close to the movable plate 13, of the pressure relief pipe 15; the air bag 14 is filled with a dry powder extinguishing agent, and the pressure in the air bag 14 is greater than the standard atmospheric pressure;
in operation, when the switch cabinet is out of order and the movable plate 13 moves during the operation, the failure in the switch cabinet usually causes the ignition of the electrical components in the switch cabinet, therefore, during the moving of the movable plate 13, the pressure relief pipe 15 installed on the movable plate 13 pierces the air bag 14 installed between the plate of the movable plate 13 and the inner wall of the main body 1, so that the dry powder extinguishing agent filled in the air bag 14 is sprayed out under the internal pressure and the extrusion of the movable plate 13, meanwhile, after the dry powder extinguishing agent is sprayed out, because the pressure relief pipe 15 pierces the air bag 14 and then is inserted into the air bag 14, part of the sprayed dry powder extinguishing agent is directly sprayed out from the pressure relief pipe 15 to the internal space of the main body 1, the fire existing on various electrical components installed in the main body 1 is controlled or extinguished, the loss is reduced, the difficulty of later maintenance is reduced, and simultaneously, because the pressure in the air bag 14 is relatively high, the dry powder extinguishing agent sprayed out of the air bag 14 enters the part between the air bag 14 and the movable plate 13, the part of the dry powder extinguishing agent enters the pressure relief pipe 15 through the conveying hole 151 formed in the pressure relief pipe 15 and is finally sprayed into the main body 1, so that the phenomenon that part of the dry powder extinguishing agent enters a staggered position in the spraying process is avoided, the effect cannot be exerted, the control effect of the dry powder extinguishing agent filled in the air bag 14 on the fire condition in the switch cabinet is reduced, the loss of the switch cabinet is increased after the switch cabinet is in fault, meanwhile, the dry powder extinguishing agent in the air bag 14 can be ensured to be quickly sprayed out and relatively uniformly covered on an electric element in the main body 1 by enabling the pressure in the air bag 14 to be relatively high, the control on the fire condition is completed, meanwhile, in the using process, the air bag 14 is fixedly installed on the inner wall of the main body 1, the sealing performance of the inner space of the switch cabinet can be increased to a certain degree, prevent in transportation, the use, behind the sealing plug 112 in the pressure release hole 11 on the lateral wall of main part 1 drops, through pressure release hole 11 direct intercommunication between the inside aperture of cubical switchboard and the external environment, lead to the electric elements in the main part 1 to receive the external environment influence, make electric elements's life descend.
As an embodiment of the present invention, a magnetic ring is fixedly installed on an inner wall of the pressure relief hole 11; the sealing plug 112 is fixedly arranged in the magnetic ring in an interference fit manner;
a first fixing frame 152 is fixedly arranged in the pressure relief pipe 15; the pressure relief pipe 15 is movably provided with a one-way plate 155, and the distance between the one-way plate 155 and the air bag 14 is smaller than the distance between the first fixing frame 152 and the air bag 14; the one-way plate 155 is fixedly connected with the first fixing frame 152 through an elastic rope 153; a retainer seat 154 is fixedly arranged on the inner wall of the pressure relief hole 11; the retainer seat 154 is positioned between the one-way plate 155 and the first fixing frame 152; the one-way plate 155 is tightly attached to the retainer ring seat 154 under the action of the elastic rope 153; after the one-way plate 155 is tightly attached to the retainer seat 154, the air flow flows in one direction towards the air bag 14 in the pressure relief pipe 15; the unidirectional plate 155 has magnetism, and a mutual repulsive magnetic action exists between the unidirectional plate 155 and the magnetic coil 111;
when the movable plate 13 moves towards the inner wall of the main body 1 under the action of high-temperature and high-pressure gas in the switch cabinet and is inserted into the pressure relief hole 11 through the pressure relief pipe 15 during use, so that the pressure in the switch cabinet is reduced after the pressure in the switch cabinet is released from the pressure relief pipe 15, at the moment, the gas in the switch cabinet is not released outwards, meanwhile, under the action of fire in the switch cabinet, the trend that fresh air is sucked into the switch cabinet through the pressure relief pipe 15 to maintain combustion exists in the switch cabinet, meanwhile, after the movable plate 13 pierces through the air bag 14, the pressure relief pipe 15 is contacted with the pressure relief hole 11, a mutually repulsive magnetic force action exists between the one-way plate 155 in the pressure relief pipe 15 and the magnetic ring 111, so that the one-way plate 155 is tightly attached to the retainer ring seat 154, and the elastic rope 153 connecting the one-way plate 155 and the first fixing frame 152 is prevented from being damaged when the high-temperature and high-pressure gas is released, the effect of the elastic rope 153 is affected, meanwhile, the tightness degree of the contact between the check plate 155 and the check ring seat 154 can be further improved through the effect of the magnetic ring 111, the sealing effect is improved, external fresh air is prevented from entering the main body 1 from the pressure relief pipe 15, the fire condition on the electrical elements in the main body 1 is enlarged, and larger loss is caused, meanwhile, because the check plate 155 is tightly attached to the check ring seat 154 through the effect of the magnetic ring 111 and the elastic rope 153 and seals the pressure relief pipe 15, after the pressure in the switch cabinet is increased again, the acting force of high-temperature and high-pressure gas in the switch cabinet on the check plate 155 is greater than that of the magnetic ring 111 and the elastic rope 153 on the check plate 155, the check plate 155 can move, the pressure relief pipe 15 is reopened, the pressure in the switch cabinet is released, the cabinet body is prevented from bursting after the pressure in the switch cabinet is too high, and accident enlargement is caused, and the loss increases.
As an embodiment of the present invention, an air inlet 31 is formed in the middle of the bottom plate 3; a lower plate 33 is fixedly arranged on the inner wall of the main body 1; the lower plate 33 is located below the movable plate 13, and the lower surface of the movable plate 13 is just in contact with the upper surface of the lower plate 33; the lower plate 33 is uniformly provided with second communicating holes 35; the distance between the second communication hole 35 and the air bag 14 is larger than the distance between the movable plate 13 and the air bag 14; a second spring 34 is fixedly arranged on the lower surface of the lower plate 33; a second baffle 32 is fixedly arranged at one end of the second spring 34 far away from the lower plate 33; the second baffle 32 is opposite to the air inlet 31, and the diameter of the second baffle 32 is larger than that of the air inlet 31; the second baffle 32 is tightly attached to the air inlet 31 under the action of gravity and the elastic force of the second spring 34;
an air outlet 21 is formed in the middle of the top plate 2; an upper plate 26 is fixedly arranged on the inner wall of the main body 1; the upper plate 26 is located above the movable plate 13, and the upper surface of the movable plate 13 is just in contact with the upper surface of the upper plate 26; the upper plate 26 is uniformly provided with communication holes I27; the distance between the first communication hole 27 and the air bag 14 is smaller than the distance between the movable plate 13 and the air bag 14;
a fan 25 is fixedly arranged on the lower surface of the top plate 2, and the fan 25 is opposite to the air outlet 21; a second fixing frame 23 is fixedly arranged on the inner wall of the air outlet 21; a deformation plate 24 is fixedly arranged in the middle of the upper surface of the second fixing frame 23; a first baffle 22 is fixedly arranged at one end of the deformation plate 24, which is far away from the second fixing frame 23; the deformation plate 24 is made of memory metal, and after the temperature of the deformation plate 24 exceeds a deformation threshold value, the deformation plate 24 deforms; after the deformation plate 24 deforms, the first baffle plate 22 is pushed to move towards the direction far away from the fan 25 until the first baffle plate 22 seals the air outlet 21;
the movable plate 13 is made of a metal material with good heat conductivity; the pressure relief pipe 15 is made of a metal material with concave heat-conducting property;
during operation, when the switch cabinet does not break down and normally operates, a large amount of heat can be generated by the electric elements in the switch cabinet in the working process, and when the generated heat is accumulated in the switch cabinet, the electric elements are easily affected, so that the service life of the electric elements is shortened or the working state of the electric elements is unstable, and the normal use of the switch cabinet is affected.
Meanwhile, in the using process, the fan 25 installed on the top plate 2 operates to drive the air with higher temperature in the control cabinet and finally discharge the air from the air outlet 21 to the outside of the switch cabinet, meanwhile, when the fan 25 discharges the air with higher temperature in the switch cabinet to the outside, the air with lower temperature in the outside enters the switch cabinet from the air inlet 31 on the bottom plate 3, the fan 25 circulates the air between the switch cabinet and the outside environment, effectively reduces the temperature in the switch cabinet, ensures that the electric elements in the switch cabinet are in better working environment, prolongs the service life of the electric elements and ensures the stability of the working state of the electric elements, meanwhile, in the process of driving the air circulation by the fan 25, because the positions of the first communication hole 27 and the second communication hole 35 are different, the air entering the switch cabinet firstly enters the main body 1 from the air inlet 31, then, the air passes through the pressure relief hole 11 on the movable plate 13 and enters the space between the movable plate 13 and the inner wall of the main body 1, and is finally pumped out by the fan 25 and exhausted to the outside, in the air flowing process, the air is fully contacted with the movable plate 13 and the pressure relief pipe 15, meanwhile, because the movable plate 13 and the pressure relief pipe 15 are both made of metal materials with good heat conductivity, and the movable plate 13 is contacted with the mounting plate 16 and the inner wall of the main body 1, in the air circulating process, the contact between the air and the movable plate 13 and the pressure relief pipe 15 can effectively improve the air heat exchange efficiency, accelerate the heat exhaust speed in the switch cabinet, and maintain the stability and the suitability of the temperature in the switch cabinet.
Meanwhile, in the using process, the second baffle 32 is opposite to the air inlet 31, the second baffle 32 is tightly attached to the air inlet 31 under the action of the second spring 34, the fan 25 is started, and when air circulation in the switch cabinet is driven, the second baffle 32 is pushed up by air entering the switch cabinet from the outside, the smooth flowing of the air is ensured, meanwhile, when the fan 25 does not work or the switch cabinet breaks down, the second baffle 32 seals the air inlet 31, the external insects are prevented from entering and the external fresh air is prevented from entering the switch cabinet, the fire condition in the switch cabinet is enlarged, and the loss is increased.
Meanwhile, in the use process, the temperature of the deformation plate 24 arranged in the air outlet 21 on the top plate 2 does not exceed the deformation threshold value, the deformation plate 24 does not deform, therefore, the first baffle 22 fixedly arranged on the deformation plate 24 can not seal the air outlet 21, ensure the normal air circulation in the switch cabinet and the relatively stable temperature in the switch cabinet, and simultaneously, when the switch cabinet is in fault, which causes fire in the switch cabinet and causes temperature rise, because the air outlet 21 is positioned at the uppermost part of the switch cabinet, therefore, high-temperature gas is firstly exhausted from the air outlet 21, the deformation plate 24 is rapidly heated until the temperature of the deformation plate 24 exceeds a deformation threshold value, the deformation plate 24 is deformed, the first baffle plate 22 is pushed to move to seal the air outlet 21, and external fresh air is prevented from entering the switch cabinet, so that the fire condition in the switch cabinet is enlarged, and the loss is increased.
As an embodiment of the present invention, a space enclosed between the upper plate 26 and the inner wall of the main body 1 serves as a first air collecting chamber; a space enclosed between the lower plate 33 and the inner wall of the main body 1 is used as a second air collecting cavity; the first air collecting cavity and the second air collecting cavity are both filled with filter cotton; the filter cotton filled in the first air collecting cavity is not in contact with the fan 25; the filter cotton filled in the second air collecting cavity does not contact the second spring 34 and the second baffle 32;
during operation, through filling the filter pulp in collection wind chamber one and collection wind chamber two, impurity in the air that can effectual filtration cubical switchboard and external environment between the circulation, avoid gathering the dust in the cubical switchboard, influence the normal work of the electric elements in the cubical switchboard and electric elements's heat dissipation, simultaneously, through filling the filter pulp in collection wind chamber one and collection wind chamber two, can effectually prevent external insect, the mouse is at the cubical switchboard during operation, enter into the cubical switchboard through air intake 31 or air outlet 21, influence the life of electric elements in the cubical switchboard or lead to electric elements trouble.
As an embodiment of the invention, sodium bicarbonate particles are uniformly embedded in the filter cotton filled in the first air collecting cavity; the diameter of the sodium bicarbonate particles is 1.5-2.5 mm; the surfaces of the sodium bicarbonate particles are wrapped with a polytetrafluoroethylene coating;
when the switch cabinet is in work, when a fault occurs in the switch cabinet, the temperature in the switch cabinet rises, sodium bicarbonate particles embedded in filter cotton in the first air collecting cavity begin to decompose to generate carbon dioxide, and then the carbon dioxide enters the inner space of the main body 1 to form an inert environment, further inhibit the development of fire, reduce the spreading speed of the fire or extinguish the fire, meanwhile, in the using process, because the relative mass of the carbon dioxide is large, the sodium bicarbonate particles are placed in the first air collecting cavity, the carbon dioxide generated by decomposition can be quickly and smoothly settled in the inner space of the main body 1 to cover the electric elements in the main body 1 and improve the distribution uniformity of the carbon dioxide, meanwhile, in the using process, the surface of the sodium bicarbonate particles is coated with a polytetrafluoroethylene coating, so that the sodium bicarbonate particles can be effectively prevented from contacting with water vapor in the external environment, the hydrolysis phenomenon of the sodium bicarbonate particles is caused, the storage life of the sodium bicarbonate particles embedded in the filter cotton is shortened, and the sodium bicarbonate hydrolysis products are prevented from corroding the cabinet body of the switch cabinet and the filter cotton to influence the normal use of the switch cabinet.
The specific working process is as follows:
when the switch cabinet is in failure and high-temperature and high-pressure gas is generated inside the switch cabinet, the pressure in the space between the movable plate 13 and the inner wall of the main body 1 is relatively small, the movable plate 13 is extruded and pushed by the high-temperature and high-pressure gas inside the switch cabinet, so that the movable plate 13 moves towards the inner wall of the main body 1, meanwhile, the pressure relief pipe 15 is fixedly installed on the movable plate 13, the pressure relief hole 11 is formed in the side wall of the main body 1, after the movable plate 13 moves, the pressure relief pipe 15 on the movable plate 13 contacts and extrudes the sealing plug 112 in the pressure relief hole 11 until the sealing plug 112 falls off, meanwhile, after the sealing plug 112 falls off, the movable plate 13 continues to be extruded and pushed by the high-temperature and high-pressure gas inside the main body 1, so that the pressure relief pipe 15 on the movable plate 13 is inserted into the pressure relief hole 11, and the space inside the main body 1 is communicated with the external environment through the pressure relief pipe 15, high-temperature and high-pressure gas in the main body 1 is released to the external environment through the pressure relief pipe 15, meanwhile, after the fault treatment of the switch cabinet is completed, the movable plate 13 in the switch cabinet returns to the original position under the action of the first spring 12, and meanwhile, after a worker picks up and re-plugs the sealing plug 112 falling off in the pressure relief hole 11 into the pressure relief hole 11, the pressure relief hole 11 can be easily re-sealed; after the switch cabinet is out of order and causes the movable plate 13 to move, during the movement of the movable plate 13, the pressure relief pipe 15 installed on the movable plate 13 can pierce the air bag 14 installed between the plate of the movable plate 13 and the inner wall of the main body 1, so that the dry powder extinguishing agent filled in the air bag 14 is sprayed out under the internal pressure and the extrusion of the movable plate 13; when the movable plate 13 moves towards the inner wall of the main body 1 under the action of high-temperature and high-pressure gas in the switch cabinet and is inserted into the pressure relief hole 11 through the pressure relief pipe 15, so that the pressure in the switch cabinet is released from the pressure relief pipe 15, the pressure in the switch cabinet is reduced, at this time, the gas in the switch cabinet is not released outwards, meanwhile, under the action of fire in the switch cabinet, the trend of sucking fresh air into the switch cabinet through the pressure relief pipe 15 to maintain combustion exists in the switch cabinet, meanwhile, after the movable plate 13 pierces the air bag 14, the pressure relief pipe 15 is contacted with the pressure relief hole 11, a mutually repulsive magnetic force action exists between the one-way plate 155 in the pressure relief pipe 15 and the magnetic ring 111, so that the one-way plate 155 is tightly attached to the retainer seat 154, and simultaneously, because the one-way plate 155 is tightly attached to the retainer seat 154 and seals the pressure relief pipe 15 under the action of the magnetic ring 111 and the elastic rope 153, after the pressure in the switch cabinet rises again, after the acting force of high-temperature and high-pressure gas in the switch cabinet on the one-way plate 155 is larger than the acting force of the magnetic ring 111 and the elastic rope 153 on the one-way plate 155, the one-way plate 155 can move, so that the pressure relief pipe 15 is opened again, and the pressure in the switch cabinet is released; in the using process, the fan 25 installed on the top plate 2 operates to drive the air with higher temperature in the control cabinet and finally discharge the air from the air outlet 21 to the outside of the switch cabinet, meanwhile, when the fan 25 discharges the air with higher temperature in the switch cabinet to the outside, the air with lower temperature in the outside enters the switch cabinet from the air inlet 31 on the bottom plate 3, the fan 25 circulates the air between the switch cabinet and the outside environment to ensure that the temperature in the switch cabinet is relatively stable, and meanwhile, in the process of driving the air circulation by the operation of the fan 25, because the positions of the first communication hole 27 and the second communication hole 35 are different, the air entering the switch cabinet firstly enters the main body 1 from the air inlet 31, then passes through the pressure relief hole 11 on the movable plate 13 and enters the space between the movable plate 13 and the inner wall of the main body 1, and finally is pumped by the fan 25 and discharged to the outside, meanwhile, in the using process, because the second baffle 32 is over against the air inlet 31, and the second baffle 32 is tightly attached to the air inlet 31 through the action of the second spring 34, when the fan 25 is started and drives the air circulation in the switch cabinet, the second baffle 32 is pushed up by the air entering the switch cabinet from the outside, meanwhile, when the fan 25 does not work or the switch cabinet breaks down, the second baffle 32 seals the air inlet 31, meanwhile, in the using process, the temperature of the deformation plate 24 installed in the air outlet 21 on the top plate 2 does not exceed the deformation threshold value, the deformation plate 24 does not deform, therefore, the first baffle 22 fixedly installed on the deformation plate 24 does not seal the air outlet 21, meanwhile, the fault occurs in the switch cabinet, the fire condition occurs in the switch cabinet, after the temperature rises, because the air outlet 21 is positioned at the top of the switch cabinet, therefore, the high-temperature gas is firstly discharged from the air outlet 21, causing the deformation plate 24 to rapidly heat up until the temperature of the deformation plate 24 exceeds a deformation threshold value, so that the deformation plate 24 deforms, and pushing the first baffle plate 22 to move to seal the air outlet 21; the filter cotton is filled in the first air collecting cavity and the second air collecting cavity to filter impurities in air circulating between the switch cabinet and the external environment, and meanwhile, the filter cotton is filled in the first air collecting cavity and the second air collecting cavity to prevent external insects and mice from entering the switch cabinet through the air inlet 31 or the air outlet 21 when the switch cabinet works; when breaking down in the cubical switchboard, the temperature rise in the cubical switchboard makes the sodium bicarbonate granule of embedding in the filter pulp in wind collection chamber one begin to decompose, produces carbon dioxide, and then makes the carbon dioxide enter into main part 1 inner space, forms the inert environment, suppresses the condition of a fire development, simultaneously, in the use, with sodium bicarbonate granule surface parcel one deck polytetrafluoroethylene coating, prevents that the hydrolysis phenomenon from appearing in the sodium bicarbonate granule.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a high-low voltage switch cabinet of fire prevention explosion-proof type, includes main part (1), its characterized in that: a top plate (2) is fixedly arranged above the main body (1); a bottom plate (3) is fixedly arranged below the main body (1); a cabinet door is hinged on the main body (1), and the cabinet door seals a space formed by the main body (1), the top plate (2) and the bottom plate (3); an installation plate (16) is fixedly installed on the inner wall of the main body (1); the mounting plates (16) are distributed uniformly from top to bottom in the main body (1); the mounting plate (16) is fixedly provided with an electric element;
the side wall of the main body (1) is provided with a pressure relief hole (11); the pressure relief holes (11) are uniformly distributed on the side walls of the left side and the right side of the main body (1); a sealing plug (112) is fixedly arranged in the pressure relief hole (11) in an interference fit manner; when the sealing plug (112) is subjected to an external force, the sealing plug (112) falls out of the switch cabinet from the pressure relief hole (11);
a first spring (12) is fixedly arranged on the inner wall of the main body (1); the first springs (12) are divided into two groups and are respectively positioned on the inner walls of the left side and the right side of the main body (1); a movable plate (13) is fixedly mounted at one end of the first spring (12) far away from the inner wall of the main body (1); the side surface of the movable plate (13) is just contacted with the inner wall of the main body (1); after the cabinet door is closed, the side surface of the movable plate (13) is just contacted with the side surface of the cabinet door facing the inside of the main body (1); when the movable plate (13) is not acted by external force, the mounting plate (16) is just contacted with the movable plate (13); when the movable plate (13) is acted by external force, the movable plate (13) moves towards the inner wall direction of the main body (1); the movable plate (13) is fixedly provided with a pressure relief pipe (15), and the pressure relief pipe (15) is positioned between the movable plate (13) and the inner wall of the main body (1); the pressure relief pipes (15) are multiple in number, and the pressure relief pipes (15) correspond to the pressure relief holes (11) one by one;
an air bag (14) is fixedly arranged on the inner wall of the main body (1); the number of the air bags (14) is two, and the two air bags are respectively positioned on the side walls of the left side and the right side of the main body (1); the air bag (14) is positioned between the pressure relief pipe (15) and the inner wall of the main body (1), and the air bag (14) is in contact with one end, away from the movable plate (13), of the pressure relief pipe (15); the pressure relief holes (11) on the inner wall of the main body (1) are covered by the air bags (14); the movable plate (13) has a tendency to be pressed towards the air bag (14) under the action of the first spring (12); when the air bag (14) is not arranged between the movable plate (13) and the inner wall of the main body (1), the pressure relief pipe (15) is contacted with the inner wall of the main body (1); the acting force of the first spring (12) on the movable plate (13) cannot enable the pressure relief pipe (15) to pierce the air bag (14);
the pressure relief pipe (15) is uniformly provided with conveying holes (151), and the conveying holes (151) are positioned at one end, close to the movable plate (13), of the pressure relief pipe (15); the air bag (14) is filled with dry powder fire extinguishing agent, and the pressure in the air bag (14) is greater than standard atmospheric pressure.
2. The fire and explosion protection type high-low voltage switch cabinet according to claim 1, characterized in that: a magnetic ring is fixedly arranged on the inner wall of the pressure relief hole (11); the sealing plug (112) is fixedly arranged in the magnetic ring in an interference fit mode;
a first fixing frame (152) is fixedly arranged in the pressure relief pipe (15); a one-way plate (155) is movably mounted in the pressure relief pipe (15), and the distance between the one-way plate (155) and the air bag (14) is smaller than the distance between the first fixing frame (152) and the air bag (14); the one-way plate (155) is fixedly connected with the first fixing frame (152) through an elastic rope (153); a retainer ring seat (154) is fixedly arranged on the inner wall of the pressure relief hole (11); the retainer ring seat (154) is positioned between the one-way plate (155) and the first fixing frame (152); the one-way plate (155) is tightly attached to the retainer ring seat (154) under the action of the elastic rope (153); after the one-way plate (155) is tightly attached to the retainer ring seat (154), airflow flows towards the direction of the air bag (14) in one way in the pressure relief pipe (15); the unidirectional plate (155) has magnetism, and a mutually repulsive magnetic action exists between the unidirectional plate (155) and the magnetic coil (111).
3. The fire and explosion protection type high-low voltage switch cabinet according to claim 1, characterized in that: an air inlet (31) is formed in the middle of the bottom plate (3); a lower plate (33) is fixedly arranged on the inner wall of the main body (1); the lower plate (33) is positioned below the movable plate (13), and the lower surface of the movable plate (13) is just contacted with the upper surface of the lower plate (33); the lower plate (33) is uniformly provided with second communicating holes (35); the distance between the second communication hole (35) and the air bag (14) is larger than the distance between the movable plate (13) and the air bag (14); a second spring (34) is fixedly arranged on the lower surface of the lower plate (33); a second baffle plate (32) is fixedly arranged at one end of the second spring (34) far away from the lower plate (33); the second baffle (32) is opposite to the air inlet (31), and the diameter of the second baffle (32) is larger than that of the air inlet (31); the second baffle plate (32) is tightly attached to the air inlet (31) under the action of gravity and the elastic force of the second spring (34);
an air outlet (21) is formed in the middle of the top plate (2); an upper plate (26) is fixedly arranged on the inner wall of the main body (1); the upper plate (26) is positioned above the movable plate (13), and the upper surface of the movable plate (13) is just contacted with the upper surface of the upper plate (26); the upper plate (26) is uniformly provided with first communicating holes (27); the distance between the first communication hole (27) and the air bag (14) is smaller than the distance between the movable plate (13) and the air bag (14);
a fan (25) is fixedly arranged on the lower surface of the top plate (2), and the fan (25) is opposite to the air outlet (21); a second fixing frame (23) is fixedly arranged on the inner wall of the air outlet (21); a deformation plate (24) is fixedly arranged in the middle of the upper surface of the second fixing frame (23); a first baffle plate (22) is fixedly arranged at one end of the deformation plate (24) far away from the second fixing frame (23); the deformation plate (24) is made of memory metal, and the deformation plate (24) deforms after the temperature of the deformation plate (24) exceeds a deformation threshold value; after the deformation plate (24) deforms, the first baffle plate (22) is pushed to move towards the direction far away from the fan (25) until the first baffle plate (22) seals the air outlet (21);
the movable plate (13) is made of a metal material with good heat-conducting property; the pressure relief pipe (15) is made of a metal material with concave heat-conducting property.
4. The high-low voltage switch cabinet with fire and explosion protection according to claim 3, wherein: a space enclosed between the upper plate (26) and the inner wall of the main body (1) is used as a first air collecting cavity; a space enclosed between the lower plate (33) and the inner wall of the main body (1) is used as a second air collecting cavity; the first air collecting cavity and the second air collecting cavity are both filled with filter cotton; the filter cotton filled in the first air collecting cavity does not contact the fan (25); the filter cotton filled in the second wind collecting cavity is not in contact with the second spring (34) and the second baffle (32).
5. The high-low voltage switch cabinet with fire and explosion protection according to claim 4, wherein: sodium bicarbonate particles are uniformly embedded in the filter cotton filled in the first air collecting cavity; the diameter of the sodium bicarbonate particles is 1.5-2.5 mm; the surfaces of the sodium bicarbonate particles are wrapped with a polytetrafluoroethylene coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110334865.1A CN112838507B (en) | 2021-03-29 | 2021-03-29 | High-low voltage switch cabinet of fire prevention explosion-proof type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110334865.1A CN112838507B (en) | 2021-03-29 | 2021-03-29 | High-low voltage switch cabinet of fire prevention explosion-proof type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112838507A CN112838507A (en) | 2021-05-25 |
| CN112838507B true CN112838507B (en) | 2021-11-05 |
Family
ID=75930743
Family Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113809650B (en) * | 2021-11-19 | 2022-04-12 | 山东科技职业学院 | Intelligent fireproof distribution box |
| CN116073260B (en) * | 2022-11-10 | 2023-10-31 | 东营金丰正阳科技发展有限公司 | Outdoor direct current busbar group control device |
| CN115800067B (en) * | 2022-12-05 | 2023-09-19 | 江苏国明浩辰科技有限公司 | 35KV indoor SF6 gas charging cabinet with pressure release chamber |
| CN115831539A (en) * | 2023-02-15 | 2023-03-21 | 江苏亚威变压器有限公司 | Energy-saving control transformer |
| CN116388037B (en) * | 2023-04-19 | 2023-12-12 | 江苏万开电气科技有限公司 | Indoor intelligent measurement and control type armored movable alternating current metal switch cabinet |
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