CN112864929B - Positive pressure type explosion-proof power distribution cabinet and use method thereof - Google Patents

Positive pressure type explosion-proof power distribution cabinet and use method thereof Download PDF

Info

Publication number
CN112864929B
CN112864929B CN202110080577.8A CN202110080577A CN112864929B CN 112864929 B CN112864929 B CN 112864929B CN 202110080577 A CN202110080577 A CN 202110080577A CN 112864929 B CN112864929 B CN 112864929B
Authority
CN
China
Prior art keywords
valve
air
sealing
air inlet
cabinet body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110080577.8A
Other languages
Chinese (zh)
Other versions
CN112864929A (en
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Xinbeidi Electric Co ltd
Original Assignee
Chongqing Xinbeidi Electric Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Xinbeidi Electric Co ltd filed Critical Chongqing Xinbeidi Electric Co ltd
Priority to CN202110080577.8A priority Critical patent/CN112864929B/en
Publication of CN112864929A publication Critical patent/CN112864929A/en
Application granted granted Critical
Publication of CN112864929B publication Critical patent/CN112864929B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • 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
    • 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
    • H02B1/306—Accessories, e.g. windows
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/045—Details of casing, e.g. gas tightness
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Drying Of Gases (AREA)

Abstract

The invention relates to a positive pressure type explosion-proof power distribution cabinet which comprises a cabinet body and a cabinet door, wherein a first air inlet, a second air inlet, a first exhaust port and a second exhaust port are arranged on the cabinet body, a filter screen, an air inlet electromagnetic valve, an air inlet fan, a filter, a dehumidifier and a switching valve are sequentially arranged in the cabinet body at the first air inlet, an air inlet pipe connected with inert gas is arranged at the second air inlet, a control device for controlling the inert gas to enter is arranged on the air inlet pipe, the exhaust electromagnetic valve and a flame arrester are sequentially arranged at the first exhaust port from inside to outside, one side of the cabinet body is movably hinged with the cabinet door, a controller is arranged on the outer side of the cabinet body, and a pressure sensor and a temperature detector are arranged in the cabinet body. The beneficial effects of the invention are as follows: when inert gas can not be introduced, the outside dust-containing air can be filtered and dehumidified, and then the inside of the cabinet is introduced for pressurization, so that the cabinet is more flexible and convenient to use, and the working efficiency is effectively improved.

Description

Positive pressure type explosion-proof power distribution cabinet and use method thereof
Technical Field
The invention relates to an explosion-proof power distribution cabinet, in particular to a positive pressure type explosion-proof power distribution cabinet and a using method thereof.
Background
With the development of industries such as kerosene chemical industry, metal smelting, chemical pharmacy and the like, the positive pressure type explosion-proof power distribution cabinet is more and more widely utilized in system control. The positive pressure type explosion-proof power distribution cabinet is generally arranged in a sealing mode, when the positive pressure type explosion-proof power distribution cabinet works in an inflammable and explosive environment, inert gas is filled into the cabinet body, so that the air pressure in the cabinet body is larger than the air pressure outside, the inflammable and explosive mixed gas outside is not prone to entering the cabinet body, and therefore the explosion caused by the contact of electric sparks generated by elements in the cabinet body in working is avoided. Most of the existing positive pressure type explosion-proof power distribution cabinets are operated in dust type inflammable and explosive environments, once dust enters the power distribution cabinet, dust explosion easily occurs in the narrow and small environment in the power distribution cabinet in contact with electric sparks generated when internal elements work, and the existing positive pressure type explosion-proof power distribution cabinet only has one air inlet and one air outlet for inert gas to enter, so that other air inlet modes are lacked, and the air pressure inside the power distribution cabinet in the using process can gradually drop, and gas needs to be supplemented regularly.
If in the course of the work at the switch board, in case it damages to have the gas cylinder of inert gas to use up or which position of air feed, when needing to be changed, just need to cut off the power supply completely with the component in the switch board and just can operate, thereby avoid in the switch board because inside atmospheric pressure is not enough to lead to the outside to contain the air inflow of dust and explode, but so both influenced the working progress, still need consume a large amount of time, come to carry out renewed taking a breath in the switch board, use very inconvenient.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a positive pressure type explosion-proof power distribution cabinet and a using method thereof so as to solve the problems.
The technical scheme of the invention is realized as follows: the utility model provides a positive pressure type explosion-proof power distribution cabinet, includes the cabinet body and cabinet door, be equipped with first air inlet, second air inlet, first exhaust port and second gas vent on the cabinet body, first air inlet is in that the internal filter screen, air inlet solenoid valve, fan, filter, dehumidifier and the diverter valve of being equipped with in proper order of cabinet, second air inlet department is equipped with the intake pipe of connecting inert gas, be equipped with the controlling means who controls inert gas and get into in the intake pipe, first exhaust port department is from interior toward being equipped with exhaust solenoid valve and spark arrester outward in proper order, one side and the cabinet door activity of the cabinet body are articulated, be equipped with the controller on the outside of the cabinet body, internal pressure sensor and the temperature detector of being equipped with of cabinet.
Through adopting above-mentioned technical scheme, when the switch board is in normal use, make its inside atmospheric pressure be greater than outside atmospheric pressure through adopting the mode that the intake pipe lets in inert gas, make difficult entering such as outside flammable and explosive dust. When inert gas cannot be filled, external air can be firstly introduced into the filter for filtering by opening the air inlet electromagnetic valve and the air inlet fan, and impurities such as dust in the air can be effectively filtered; the filtered air is respectively led into the dehumidifier through the first inlet and the second inlet, the temperature of the refrigerating end of the semiconductor refrigerating sheet in the dehumidifier is lower than that of the led-in air, so that water vapor condensation in the air in the dehumidifying cavity is gathered to achieve the dehumidifying effect, water drops can be effectively prevented from being attached to electrical elements in the power distribution cabinet, the short circuit is avoided, the dehumidified dry and cold air is sent into the cabinet body through the first sealing valve to increase the pressure in the cabinet body, the pressure reaches a specified value, external inflammable and explosive dust and the like cannot easily enter, and the power distribution cabinet can be effectively helped to be cooled; in the dehumidification process of the dehumidifier, air is introduced into the heating end of the semiconductor refrigeration sheet to help heat dissipation, and the heated air is discharged out of the cabinet body through the switching valve. The dry and cold air after dehumidification of the dehumidification cavity in the dehumidifier can be guided into the heat dissipation cavity through the air guide hole and then is sent into the switching valve through the first outlet, the switching valve is communicated with the medium inlet and the second medium outlet to guide the air into the cabinet body, so that the heating end of the semiconductor refrigeration sheet can be effectively helped to dissipate heat, the temperature of the dehumidified air can be effectively improved, the temperature in the cabinet body can not be too low in places with low temperature in winter, the situation that some electrical elements cannot be normally used due to too low temperature is avoided, selection can be carried out according to actual conditions, and the use is more convenient and simple; can let in the cabinet internal pressure boost after can't letting in dusty filtration, the dehumidification of outside when unable letting in inert gas, make its use more nimble, convenient, can continue to use inert gas to inflate after inert gas's partial maintenance is accomplished, need not to cut off the power supply to the switch board during, effectual work efficiency that has improved.
The invention is further configured to: the filter includes filter housing, a dust collection tube, a sleeve pipe, a guide tube and a filter piece, be equipped with the dust removal air inlet on filter housing's the lateral wall, be equipped with the dust removal gas outlet on filter housing's the top, filter housing's lower extreme is established to the cone type, a dust collection tube swing joint is on filter housing's lower extreme, sheathed tube upper end fixed connection is on the top of filter housing inner wall, sheathed tube lower pot head establish outside the guide tube and with the guide tube the outer wall between the clearance be equipped with the air guide channel, through a plurality of connecting rod fixed connection between sheathed tube lower extreme and the guide tube, the lower extreme of guide tube stretches into in the dust collection tube, filter piece fix in the sleeve pipe and with telescopic inner wall clearance setting, the lower extreme of filtering piece extends to in the guide tube, filter piece establishes to the tube-shape, the opening part and the dust removal gas outlet of filtering piece are connected.
By adopting the technical scheme, the dust-containing gas enters the filter shell through the dust-removing gas inlet to rotate along the inner wall of the filter shell, part of dust falls into the dust-collecting cylinder to be collected in the rotating process, the rest gas enters the sleeve through the gas guide channel and is filtered by the filtering piece, the clean air filtered by the filtering piece is discharged through the dust-removing gas outlet, and the dust on the surface of the filtering piece falls into the dust-collecting cylinder; the dust-containing gas is pretreated by rotating before the dust removal of the filter element, so that the dust attached to the surface of the filter element is less, and the dust removal effect is better.
The invention is further configured to: the bus direction of the dust removal air inlet is coincided with the tangential direction of the side wall of the filter shell, and the outer wall of the lower end of the filter shell is connected with the inner wall of the upper end of the dust collection cylinder through threads.
By adopting the technical scheme, the air entering from the dust removal air inlet can rotate along the inner wall of the filter, so that the flow speed of the rotating air flow is higher, and the filtering effect is better; the filter shell and the dust collecting cylinder which are connected by the thread enable the dust collecting cylinder to be more convenient to disassemble and assemble, and the dust collecting cylinder is easier to clean.
The invention is further configured to: the dehumidifier comprises a dehumidifier shell, a semiconductor refrigeration piece, a first sealing valve, a second sealing valve and a third sealing valve, wherein a dehumidification cavity and a heat dissipation cavity are separated by a vertically arranged partition plate in the dehumidification shell, the semiconductor refrigeration piece is arranged on the partition plate, a refrigeration end and a heating end of the semiconductor refrigeration piece are respectively arranged in the dehumidification cavity and the heat dissipation cavity, a refrigeration end and a heating end of the semiconductor refrigeration piece are respectively provided with a cold heat conduction piece and a heat conduction piece, a water storage cavity is arranged at the bottom end in the dehumidifier shell, a first inlet and a first outlet which are respectively communicated with the dehumidification cavity and the heat dissipation cavity are arranged on the top end of the dehumidifier shell, a second outlet and a second inlet which are communicated with the outside are respectively arranged on the lower sides of the dehumidification cavity and the heat dissipation cavity, a gas guide hole communicated with the dehumidification cavity and the heat dissipation cavity is arranged on the partition plate, the second outlet, the second inlet and the gas guide hole are respectively arranged below the semiconductor refrigeration piece, the first sealing valve is arranged in the second outlet, the second gas guide hole is arranged in the third sealing valve.
By adopting the technical scheme, filtered air enters the dehumidification cavity through the first inlet, the air guide hole is closed, the air is cooled through the cold heat conduction sheet connected with the refrigeration end of the semiconductor refrigeration sheet, so that water vapor in the air is condensed on the cold heat conduction sheet for dehumidification, water drops drop into the water storage cavity for collection, and dehumidified dry and cold air enters the cabinet body through the second outlet for pressurization of the cabinet body; meanwhile, the filtered air enters the heat dissipation cavity through the second inlet to help the heat conduction temperature sheet connected with the heating end of the semiconductor refrigerating sheet to dissipate heat, so that the refrigerating effect of the refrigerating end of the semiconductor refrigerating sheet is better; the second outlet and the first inlet can be sealed, the air guide hole is opened again to guide the dehumidified dry and cold air into the heat dissipation cavity to heat the dry and cold air, and then the dry and warm air is guided into the cabinet body through the switching valve to pressurize the cabinet body, so that the internal temperature of the cabinet body is not too low.
The invention is further configured to: first seal valve, second seal valve and third seal valve homostructure are the same, the third seal valve includes base, closing plate, adapter sleeve, fixed plate, fixed axle, driving motor and spring, the lateral wall of base is sealed to be fixed on the inner wall of second entry, be equipped with on the base and rotate the groove, rotate and set up the first through-hole with closing plate matched with on the tank bottom of groove, the closing plate closely laminates and rotates on the tank bottom of rotating the groove, the closing plate is kept away from and is equipped with the square shaft that the rectangle set up on one side of first through-hole, be equipped with the spread groove corresponding and sliding connection with the square shaft on the adapter sleeve, the fixed plate passes through fixed axle fixed connection on the inner wall of second entry, driving motor fixes on the fixed plate, driving motor's output shaft runs through the fixed plate and is connected with the adapter sleeve, be equipped with the support ring on the outer wall of adapter sleeve, be equipped with the cover between support ring and the closing plate and establish the spring outside the adapter sleeve.
By adopting the technical scheme, the sealing plate is matched with the first through hole, and the square shaft is driven to rotate by the driving motor, so that the sealing plate covers or opens the first through hole, the opening and closing effect is achieved, the opening and closing are quicker, and the structure is simple; the spring can be with the inseparable pressure of closing plate on first through-hole, makes its sealed effect better.
The invention is further configured to: the groove wall of the rotating groove is provided with a sealing groove for the edge of the sealing plate to be rotatably connected, a first sealing ring is arranged in the sealing groove, and the first sealing ring is connected with one side, far away from the connecting sleeve, of the sealing plate.
Through adopting above-mentioned technical scheme, the effectual leakproofness that has improved between closing plate and the seal groove of first sealing washer makes its sealed effect better, more stability.
The invention is further configured to: the switching valve comprises a valve body, a shaft sleeve, a valve rod and a valve clack, wherein the shaft sleeve, the valve rod and the valve clack are arranged in the valve body, a valve cavity is formed in one end of the valve body, a medium inlet, a first medium outlet and a second medium outlet are formed in the side wall of the valve body, the shaft sleeve is closely matched and connected with the inner wall of an opening of the valve cavity, a medium channel communicated with the valve cavity is formed in one end, away from the opening of the valve cavity, of the shaft sleeve, a plurality of second through holes communicated with the medium channel and the second medium outlet are formed in the side wall of the shaft sleeve, the valve clack is fixedly connected to one end of the valve rod, the other end of the valve rod sequentially penetrates through the medium channel and the shaft sleeve to be connected with an output shaft of an external push rod motor, sealing pieces are arranged at the front end and the rear end of the valve clack, the sealing pieces at the two ends of the valve clack are respectively matched and sealed with the first medium outlet and the medium channel, two blocking pieces are sleeved on the valve rod, the two shaft sleeves are respectively arranged at the front end and the rear end of the valve clack, the blocking pieces are adapted to the inner cavity of the medium channel, a plurality of second sealing rings are arranged between the outer wall of the shaft sleeve and the inner wall of the valve cavity, and a Y-shaped sealing ring are arranged between the valve rod.
By adopting the technical scheme, the medium inlet is communicated with the first medium outlet and the second medium outlet, and the valve rod is driven by the push rod motor to move transversely to seal the first medium outlet or the second medium outlet, so that the effect of switching the passage is achieved; the baffle plate can effectively avoid instant communication of the gas circuit, and the switching of the gas circuit is more reliable; the Y-shaped sealing ring effectively improves the sealing performance between the valve rod and the shaft sleeve when the valve rod is contracted.
The invention is further configured to: the dust removal air outlet of the filter is respectively communicated with a first inlet and a second inlet of the dehumidifier through a first air duct, a second outlet of the dehumidifier is communicated with the inside of the cabinet body, the first outlet of the dehumidifier is connected with a medium inlet of the switching valve through a second air duct, a first medium outlet of the switching valve is communicated with a second air outlet, a one-way valve which can only exhaust outwards is arranged in the second air outlet, and a second medium outlet of the switching valve is communicated with the inside of the cabinet body.
Through adopting above-mentioned technical scheme, the air after the filter filters is through first air duct leading-in simultaneously to the dehumidifier in first entry and the second entry, the drying air after the heating of dehumidifier passes through the leading-in medium entrance to the diverter valve of second air duct in, the check valve of second air vent department can only allow gas to exhaust from the outer cabinet body of second gas vent, and outside gas can't enter into the second air vent in, can effectually avoid outside dust to enter into the cabinet body.
The invention is further configured to: the air inlet electromagnetic valve, the air inlet fan, the semiconductor refrigeration piece, the driving motor, the push rod motor, the control device, the exhaust electromagnetic valve, the pressure sensor and the temperature detector are all electrically connected with the controller.
By adopting the technical scheme, the automatic control device can be automatically controlled through the controller, different actions can be performed according to different conditions, the use is more convenient and easy, and the workload of workers is reduced.
A use method of a positive pressure type explosion-proof power distribution cabinet comprises the following steps:
s1: when the second air inlet admits air, if the pressure sensor detects that the pressure value in the cabinet body is smaller than X, the controller closes the air inlet electromagnetic valve, the air inlet fan, the exhaust electromagnetic valve and the first sealing valve, drives a push rod motor of the switching valve to pull back the valve rod to seal the second medium outlet, and starts the control device to be filled with inert gas until the pressure value is larger than X;
s2: when the first air inlet admits air, the controller controls the control device to stop charging inert gas, if the pressure sensor detects that the pressure value in the cabinet body is smaller than X, the exhaust electromagnetic valve and the second sealing valve are closed, the air inlet electromagnetic valve, the air inlet fan, the semiconductor refrigeration sheet, the first sealing valve and the third sealing valve are opened, and the push rod motor of the switching valve is driven to pull back the valve rod to seal the second medium outlet;
s3: external air is sucked by the air inlet fan, enters the filter through the filter screen, the air inlet electromagnetic valve and the air inlet fan in sequence and is filtered, the filtered air enters the dehumidification cavity of the dehumidifier from the first inlet through the first air duct for cooling and dehumidification, the dehumidified dry cold air enters the cabinet body through the first sealing valve, and moisture on the cold-conducting temperature sheet is gathered and dropped in the water storage cavity for collection;
s4: meanwhile, filtered air enters a heat dissipation cavity of the dehumidifier through the first air duct and the third sealing valve to help a heat conduction temperature sheet of the semiconductor refrigeration sheet to dissipate heat, and heated hot air enters a valve cavity of the switching valve through the first outlet and the second air duct and is discharged out of the cabinet body through the first medium outlet and the second air outlet;
s5: when the pressure sensor detects that the pressure value in the cabinet body reaches X, the pressure sensor sends a signal to the controller, the controller controls the air inlet electromagnetic valve, the air inlet fan, the semiconductor refrigeration sheet and the first sealing valve to be closed, the air charging is stopped, and the switching valve keeps the sealing state of the second medium outlet;
s6: when the pressure sensor detects that the pressure value in the cabinet body exceeds Y, Y is larger than X, the exhaust electromagnetic valve is opened until the pressure value is smaller than Y, and then the exhaust electromagnetic valve is closed;
s7: when the temperature detector detects that the temperature in the cabinet body is lower than Z and the pressure value in the cabinet body is smaller than Y, the controller controls the air inlet electromagnetic valve, the air inlet fan, the semiconductor refrigeration sheet and the second sealing valve to be opened, the first sealing valve and the third sealing valve are closed, and the push rod motor of the switching valve pushes the valve rod to seal the first medium outlet;
s8: outside air is sucked through the air inlet fan, enters the filter through the filter screen, the air inlet electromagnetic valve and the air inlet fan in sequence and is filtered, the filtered air enters the dehumidifying cavity of the dehumidifier through the first air duct through the first inlet to be cooled and dehumidified, then enters the heat dissipation cavity through the second sealing valve to be heated, the heated dry warm air enters the valve cavity of the switching valve through the first outlet and the second air duct, and is discharged into the cabinet body through the second medium outlet of the switching valve.
By adopting the technical scheme, when the inert gas inlet device is normal, the inert gas can be filled through the gas inlet pipe to pressurize; when the air inlet device of the inert gas has a problem and can not be used for air inlet, the air inlet electromagnetic valve and the air inlet fan can be opened to guide external dust-containing gas into the filter for filtering, the filtered gas is respectively and simultaneously guided into the dehumidification cavity and the heat dissipation cavity in the dehumidifier, the dehumidification cavity dehumidifies the gas, the air flowing in the heat dissipation cavity helps the heating end of the semiconductor refrigeration sheet to dissipate heat, so that the refrigeration effect of the heating end is better, the heated air is discharged out of the cabinet body through the switching valve, and the dehumidified dry and cold air is introduced into the cabinet body for pressurization; when the air pressure in the cabinet body is too high, the exhaust is performed by opening the exhaust electromagnetic valve; when the temperature in the cabinet body is too low, dry and cold air dehumidified in the dehumidifier can be introduced into the heat dissipation cavity through the second sealing valve for heating, and the heated air is discharged into the cabinet body through the switching valve, so that the problem that some electrical elements cannot work normally due to too low temperature in the cabinet body can be well prevented; dry and cold air and dry and warm air can be introduced into the air purifier, and the air purifier can be selected according to different conditions, so that the air purifier is more convenient to use; can let in the cabinet internal pressure boost after can't letting in dusty filtration, the dehumidification of outside when unable letting in inert gas, make its use more nimble, convenient, can continue to use inert gas to inflate after inert gas's partial maintenance is accomplished, need not to cut off the power supply to the switch board during, effectual work efficiency that has improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a filter according to an embodiment of the present invention.
Fig. 3 is a structural sectional view of a-a in fig. 2 according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a dehumidifier according to an embodiment of the present invention.
FIG. 5 is a schematic diagram of A according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a sealing plate and a first through hole of a third sealing valve according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a switching valve according to an embodiment of the present invention.
Fig. 8 is a structural sectional view of a cabinet body and a cabinet door in the embodiment of the invention.
FIG. 9 is a schematic diagram of a structure B according to an embodiment of the present invention.
FIG. 10 is a flow chart of a method of use in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-10, the invention discloses a positive pressure type explosion-proof power distribution cabinet, which comprises a cabinet body 1 and a cabinet door 2, wherein the cabinet body 1 is provided with a first air inlet 3, a second air inlet 4, a first exhaust port 5 and a second exhaust port 6, the first air inlet 3 is positioned in the cabinet body 1 and is sequentially provided with a filter screen 8, an air inlet electromagnetic valve 9, an air inlet fan 10, a filter 11, a dehumidifier 12 and a switching valve 13, the second air inlet 4 is provided with an air inlet pipe 7 connected with inert gas, the air inlet pipe 7 is provided with a control device 21 for controlling the inert gas to enter, the first exhaust port 5 is sequentially provided with an exhaust electromagnetic valve 14 and a flame arrester 15 from inside to outside, one side of the cabinet body 1 is movably hinged with the cabinet door 2, the outer side of the cabinet body 1 is provided with a controller 16, and the cabinet body 1 is internally provided with a pressure sensor 17 and a temperature detector 18.
Through adopting above-mentioned technical scheme, when the switch board is in normal use, make its inside atmospheric pressure be greater than outside atmospheric pressure through adopting the mode that the intake pipe lets in inert gas, make difficult entering such as outside flammable and explosive dust. When inert gas cannot be filled, external air can be firstly introduced into the filter for filtering by opening the air inlet electromagnetic valve and the air inlet fan, and impurities such as dust in the air can be effectively filtered; the filtered air is respectively led into the dehumidifier through the first inlet and the second inlet, the temperature of the refrigerating end of the semiconductor refrigerating sheet in the dehumidifier is lower than that of the led-in air, so that water vapor condensation in the air in the dehumidifying cavity is gathered to achieve the dehumidifying effect, water drops can be effectively prevented from being attached to electrical elements in the power distribution cabinet, the short circuit is avoided, the dehumidified dry and cold air is sent into the cabinet body through the first sealing valve to increase the pressure in the cabinet body, the pressure reaches a specified value, external inflammable and explosive dust and the like cannot easily enter, and the power distribution cabinet can be effectively helped to be cooled; in the dehumidification process of the dehumidifier, air is introduced into the heating end of the semiconductor refrigeration sheet to help heat dissipation, and the heated air is discharged out of the cabinet body through the switching valve. The dry and cold air after dehumidification of the dehumidification cavity in the dehumidifier can be guided into the heat dissipation cavity through the air guide hole and then sent into the switching valve through the first outlet, and the switching valve is communicated with the medium inlet and the second medium outlet to guide the air into the cabinet body, so that the heat dissipation of the heating end of the semiconductor refrigeration sheet can be effectively facilitated, the temperature of the dehumidified air can be effectively increased, the temperature in the cabinet body can not be too low in places with low temperature in winter, the situation that some electrical elements cannot be normally used due to too low temperature is avoided, the selection can be performed according to actual conditions, and the use is more convenient and simpler; can let in the cabinet internal pressure boost after can't letting in dusty filtration, the dehumidification of outside when unable letting in inert gas, make its use more nimble, convenient, can continue to use inert gas to inflate after inert gas's partial maintenance is accomplished, need not to cut off the power supply to the switch board during, effectual work efficiency that has improved.
In the embodiment of the present invention, the filter 11 includes a filter housing 110, a dust collecting canister 111, a sleeve 112, a guiding tube 113 and a filtering element 114, a dust removing air inlet 1100 is disposed on a side wall of the filter housing 110, a dust removing air outlet 1101 is disposed on a top end of the filter housing 110, a lower end of the filter housing 110 is in a cone shape, the dust collecting canister 111 is movably connected to a lower end of the filter housing 110, an upper end of the sleeve 112 is fixedly connected to a top end of an inner wall of the filter housing 110, a lower end of the sleeve 112 is sleeved outside the guiding tube 113 and provided with an air guiding channel 115 in a gap with an outer wall of the guiding tube 113, a lower end of the sleeve 112 is fixedly connected to the guiding tube 113 through a plurality of connecting rods 116, a lower end of the guiding tube 113 extends into the dust collecting canister 111, the filtering element 114 is fixed in the sleeve 112 and provided in a gap with an inner wall of the sleeve 112, a lower end of the filtering element 114 extends into the guiding tube 113, the filtering element 114 is in a cylindrical shape, and an opening of the filtering element 114 is connected to the dust removing air outlet 1101.
By adopting the technical scheme, the dust-containing gas enters the filter shell through the dust-removing gas inlet to rotate along the inner wall of the filter shell, part of dust falls into the dust-collecting cylinder to be collected in the rotating process, the rest gas enters the sleeve through the gas guide channel to be filtered by the filter piece, the clean air filtered by the filter piece is discharged through the dust-removing gas outlet, and the dust on the surface of the filter piece falls into the dust-collecting cylinder; the dust-containing gas is pretreated by rotating before the dust removal of the filter element, so that the dust attached to the surface of the filter element is less, and the dust removal effect is better.
In the embodiment of the present invention, a generatrix direction of the dust-removing air inlet 1100 coincides with a tangential direction of a side wall of the filter housing 110, and an outer wall of a lower end of the filter housing 110 is connected to an inner wall of an upper end of the dust collecting cylinder 111 by a screw thread.
By adopting the technical scheme, the air entering from the dust removal air inlet can rotate along the inner wall of the filter, so that the flow speed of the rotating air flow is higher, and the filtering effect is better; the filter shell and the dust collecting cylinder which are connected through the threads enable the dust collecting cylinder to be more convenient to disassemble and assemble, and the dust collecting cylinder is easier to clean.
In the embodiment of the present invention, the dehumidifier 12 includes a dehumidifier shell 120, a semiconductor refrigeration sheet 121, a first sealing valve 122, a second sealing valve 123 and a third sealing valve 124, the dehumidification cavity 1201 and the heat dissipation cavity 1202 are separated by a partition 1200 vertically disposed in the dehumidification shell 120, the semiconductor refrigeration sheet 121 is disposed on the partition 1200, the refrigeration end and the heating end of the semiconductor refrigeration sheet 121 are respectively disposed in the dehumidification cavity 1201 and the heat dissipation cavity 1202, the refrigeration end and the heating end of the semiconductor refrigeration sheet 121 are respectively provided with a cold heat conduction sheet 125 and a heat conduction sheet 126, the bottom end in the dehumidifier shell 120 is provided with a water storage cavity 1203, the top end of the dehumidifier shell 120 is provided with a first inlet 1204 and a first outlet 1205 respectively communicated with the dehumidification cavity 1201 and the heat dissipation cavity 1202, the lower sides of the dehumidification cavity 1201 and the heat dissipation cavity 1202 are respectively provided with a second outlet 1206 and a second inlet 1207 communicated with the outside, the partition 1200 is provided with the dehumidification cavity 1201 and the heat dissipation cavity 1202, the second outlet, the second inlet 7 and the heat conduction hole 1206 are respectively provided in the sealing valve 1208, the second outlet 1207 is disposed in the semiconductor refrigeration cavity 121, and the sealing valve 124 are disposed in the second sealing valve 1208, and the partition 1200 is disposed below the sealing valve 1207.
By adopting the technical scheme, filtered air enters the dehumidification cavity through the first inlet, the air guide hole is closed, the air is cooled through the cold heat conduction sheet connected with the refrigeration end of the semiconductor refrigeration sheet, so that water vapor in the air is condensed on the cold heat conduction sheet for dehumidification, water drops drop into the water storage cavity for collection, and dehumidified dry and cold air enters the cabinet body through the second outlet for pressurization of the cabinet body; meanwhile, filtered air enters the heat dissipation cavity through the second inlet to help the heat conduction temperature sheet connected with the heating end of the semiconductor refrigerating sheet to dissipate heat, so that the refrigerating effect of the refrigerating end of the semiconductor refrigerating sheet is better; the second outlet and the first inlet can be sealed, the air guide hole is opened again to guide the dehumidified dry and cold air into the heat dissipation cavity to heat the dry and cold air, and then the dry and warm air is guided into the cabinet body through the switching valve to pressurize the cabinet body, so that the internal temperature of the cabinet body is not too low.
In the embodiment of the present invention, the first sealing valve 122, the second sealing valve 123 and the third sealing valve 124 have the same structure, the third sealing valve 124 includes a base 1240, a sealing plate 1241, a connecting sleeve 1242, a fixing plate 1243, a fixing shaft 1244, a driving motor 1245 and a spring 1246, an outer side wall of the base 1240 is hermetically fixed on an inner wall of the second inlet 1207, the base 1240 is provided with a rotating slot 12400, a first through hole 12401 matching with the sealing plate 1241 is formed on a bottom of the rotating slot 12400, the sealing plate 1241 is tightly attached to the bottom of the rotating slot 12400 to rotate, a rectangular square shaft 1247 is arranged on a side of the sealing plate 1241 away from the first through hole 12401, the connecting sleeve 1242 is provided with a connecting sleeve 20 corresponding to and slidably connected to the square shaft 1247, the fixing plate 1243 is fixedly connected to the inner wall of the second inlet 1207 through the fixing shaft 1244, the driving motor 1245 is fixed to the fixing plate 3, an output shaft of the driving motor 1245 penetrates through the fixing plate 1243 to be connected to the connecting sleeve 2, the connecting sleeve is arranged on an outer wall of the connecting sleeve 1242, and the supporting ring is arranged between the sealing plate 12421 and the supporting ring.
By adopting the technical scheme, the sealing plate is matched with the first through hole, and the square shaft is driven to rotate by the driving motor, so that the sealing plate covers or opens the first through hole, the opening and closing effect is achieved, the opening and closing are quicker, and the structure is simple; the spring can be with the inseparable pressure of closing plate on first through-hole, makes its sealed effect better.
In the embodiment of the present invention, a groove wall of the rotating groove 12400 is provided with a seal groove 12402 for rotationally connecting an edge of the seal plate 1241, a first seal ring 1248 is provided in the seal groove 12402, and the first seal ring 1248 is connected to a side of the seal plate 1241 away from the connection sleeve 1242.
Through adopting above-mentioned technical scheme, the effectual leakproofness that has improved between closing plate and the seal groove of first sealing washer makes its sealed effect better, more stability.
In the embodiment of the present invention, the switching valve 13 includes a valve body 130, a shaft sleeve 131, a valve rod 132, and a valve flap 133 which are disposed in the valve body 130, wherein a valve cavity 135 is disposed at one end of the valve body 130, a medium inlet 1300, a first medium outlet 1301, and a second medium outlet 1302 which are communicated with the valve cavity 135 are disposed on a side wall of the valve body 130, the shaft sleeve 131 is closely connected to an inner wall of an opening of the valve cavity 135, a medium passage 1310 which is communicated with the valve cavity 135 is disposed on one end of the shaft sleeve 131 which is far away from the opening of the valve cavity 135, a plurality of second through holes 1311 which are communicated with the medium passage 1310 and the second medium outlet 1302 are disposed on a side wall of the shaft sleeve 131, the valve flap 133 is fixedly connected to one end of the valve rod 132, the other end of the valve rod 132 sequentially passes through the medium passage 1310 and the shaft sleeve 131 to be connected to an output shaft of an external push rod motor 134, sealing sheets 1330 are disposed on front and rear ends of the valve flap 133, sealing sheets 1330 on both ends of the valve flap 133 are respectively sealed with the first medium outlet 1301 and a sealing ring 1320 of the valve cavity 136, two sealing sheets 137 are respectively disposed on the shaft sleeve 132, a sealing ring 1320 which is disposed between the inner wall of the inner cavity 1320 of the valve flap 1320 and the inner wall of the inner cavity of the valve cavity, and the sealing ring 1320 of the valve cavity 135 are disposed between the sealing ring 1320, and the sealing ring 1320 of the valve flap 133.
By adopting the technical scheme, the medium inlet is communicated with the first medium outlet and the second medium outlet, and the valve rod is driven by the push rod motor to move transversely to seal the first medium outlet or the second medium outlet, so that the effect of switching the passage is achieved; the baffle plate can effectively avoid instant communication of the gas circuit, and the switching of the gas circuit is more reliable; the Y-shaped sealing ring effectively improves the sealing performance between the valve rod and the shaft sleeve when the valve rod contracts.
In the embodiment of the invention, an inner frame 200 connected with a cabinet door 2 is arranged on a cabinet body 1, the inner frame 200 is provided with a mounting groove 201, a hollow sealing element 202 is arranged in the mounting groove 201, an opening is arranged on one side of the sealing element 202 facing the bottom of the mounting groove 201, the sealing element 202 protrudes out of the mounting groove 201, an abutting groove 203 corresponding to the part of the sealing element 202 protruding out of the mounting groove 201 is arranged on the outer edge of the cabinet door 2, pressing strips 204 are respectively arranged on two sides of the inner wall of the sealing element 202, the pressing strips 204 and the sealing element 202 are fixed on the side wall of the mounting groove 201 through screws 205, limiting strips 206 are respectively arranged on the opposite sides of the lower ends of the two pressing strips 204, the lower cross sections of the limiting strips 206 are arranged in an arc shape, the lower end faces of the two limiting strips 206 are positioned on the same horizontal plane, and a guide hole 207 communicating the inside of the cabinet body 1 and the opening of the sealing element 202 is arranged on the cabinet body 1.
By adopting the technical scheme, air in the cabinet body can enter the sealing element through the guide hole, and the sealing element can be abutted against the abutting groove of the cabinet door by high air pressure in the cabinet body, so that the sealing element is tightly attached to the cabinet door, and the sealing property between the cabinet body and the cabinet door can be effectively improved; spacing strip makes the cabinet door when opening and close, supports and protects the sealing member, avoids the sealing member to damage increase of service life.
In the embodiment of the present invention, the dust-removing air outlet 1101 of the filter 11 is respectively communicated with the first inlet 1204 and the second inlet 1207 of the dehumidifier 12 through the first air duct 19, the second outlet 1206 of the dehumidifier 12 is communicated with the inside of the cabinet 1, the first outlet 1205 of the dehumidifier 12 is connected with the medium inlet 1300 of the switching valve 13 through the second air duct 20, the first medium outlet 1301 of the switching valve 13 is communicated with the second air outlet 6, the second air outlet 6 is internally provided with the one-way valve 22 which can only exhaust air outwards, and the second medium outlet 1302 of the switching valve 13 is communicated with the inside of the cabinet 1.
Through adopting above-mentioned technical scheme, the air after the filter filters is through first air duct leading-in simultaneously to the dehumidifier in first entry and the second entry, the drying air after the heating of dehumidifier passes through the leading-in medium entrance to the diverter valve of second air duct in, the check valve of second air vent department can only allow gas to exhaust from the outer cabinet body of second gas vent, and outside gas can't enter into the second air vent in, can effectually avoid outside dust to enter into the cabinet body.
In the embodiment of the present invention, the air intake solenoid valve 9, the air intake fan 10, the semiconductor cooling plate 121, the driving motor 1245, the push rod motor 134, the control device 21, the air exhaust solenoid valve 14, the pressure sensor 17, and the temperature detector 18 are all electrically connected to the controller 16.
By adopting the technical scheme, the automatic control can be carried out through the controller, different actions can be carried out according to different conditions, the use is more convenient and easier, and the workload of workers is reduced.
A use method of a positive pressure type explosion-proof power distribution cabinet comprises the following steps:
s1: when the second air inlet is used for air intake, if the pressure sensor 17 detects that the pressure value in the cabinet 1 is smaller than X, the controller 16 closes the air intake solenoid valve 9, the air intake fan 10, the air exhaust solenoid valve 14 and the first sealing valve 122, drives the push rod motor 134 of the switching valve 13 to pull back the valve rod 132 to seal the second medium outlet 1302, and starts the control device 21 to fill the inert gas until the pressure value is larger than X;
s2: when the first air inlet feeds air, the controller 16 controls the control device 21 to stop filling the inert gas, and if the pressure sensor 17 detects that the pressure value in the cabinet 1 is smaller than X, the exhaust solenoid valve 14 and the second sealing valve 123 are closed, the air inlet solenoid valve 9, the air inlet fan 10, the semiconductor refrigeration sheet 121, the first sealing valve 122 and the third sealing valve 124 are opened, and the push rod motor 134 of the switching valve 13 is driven to pull back the valve rod 132 to seal the second medium outlet 1302;
s3: external air is sucked by an air inlet fan 10, enters a filter 11 through a filter screen 8, an air inlet electromagnetic valve 9 and the air inlet fan 10 in sequence and is filtered, the filtered air enters a dehumidifying cavity 1201 of a dehumidifier 12 through a first air duct 19 from a first inlet 1204 to be cooled and dehumidified, the dehumidified dry cold air enters the cabinet body 1 through a first sealing valve 122, and moisture on a cold temperature-conducting sheet 125 is gathered and drops in a water storage cavity 1203 to be collected;
s4: meanwhile, filtered air enters the heat dissipation cavity 1202 of the dehumidifier 12 through the third sealing valve 124 through the first air duct 19 to help the heat conducting and temperature regulating plate 126 of the semiconductor chilling plate 121 dissipate heat, and heated hot air enters the valve cavity 135 of the switching valve 13 through the first outlet 1205 and the second air duct 20 and is then discharged out of the cabinet 1 through the first medium outlet 1301 and the second air outlet 6;
s5: when the pressure sensor 17 detects that the pressure value in the cabinet 1 reaches X, the pressure sensor 17 sends a signal to the controller 16, the controller 16 controls the air inlet electromagnetic valve 9, the air inlet fan 10, the semiconductor refrigeration sheet 121 and the first sealing valve 122 to be closed, the inflation is stopped, and the switching valve 13 maintains the sealed state of the second medium outlet 1302;
s6: when the pressure sensor 17 detects that the pressure value in the cabinet body 1 exceeds Y, Y is larger than X, the exhaust electromagnetic valve 14 is opened until the pressure value is smaller than Y, and then the exhaust electromagnetic valve 14 is closed;
s7: when the temperature detector 18 detects that the temperature in the cabinet 1 is lower than Z and the pressure value in the cabinet 1 is lower than Y, the controller 16 controls the air intake solenoid valve 9, the air intake fan 10, the semiconductor refrigeration sheet 121 and the second sealing valve 123 to be opened, the first sealing valve 122 and the third sealing valve 124 to be closed, and the push rod motor 134 of the switching valve 13 pushes the valve rod 132 to seal the first medium outlet 1301;
s8: the outside air is sucked by the air inlet fan 10, enters the filter 11 through the filter screen 8, the air inlet electromagnetic valve 9 and the air inlet fan 10 in sequence for filtering, enters the dehumidification cavity 1201 of the dehumidifier 12 from the first inlet 1204 through the first air duct 19 for cooling and dehumidification, then enters the heat dissipation cavity 1202 through the second sealing valve 123 for heating, and the heated dry warm air enters the valve cavity 135 of the switching valve 13 through the first outlet 1205 and the second air duct 20 and is discharged into the cabinet body 1 through the second medium outlet 1302 of the switching valve 13.
By adopting the technical scheme, when the inert gas inlet device is normal, the inert gas can be filled through the gas inlet pipe to pressurize; when the air inlet device of the inert gas has a problem and can not be used for air inlet, the air inlet electromagnetic valve and the air inlet fan can be opened to guide external dust-containing gas into the filter for filtering, the filtered gas is respectively and simultaneously guided into the dehumidification cavity and the heat dissipation cavity in the dehumidifier, the dehumidification cavity dehumidifies the gas, the air flowing in the heat dissipation cavity helps the heating end of the semiconductor refrigeration sheet to dissipate heat, so that the refrigeration effect of the heating end is better, the heated air is discharged out of the cabinet body through the switching valve, and the dehumidified dry and cold air is introduced into the cabinet body for pressurization; when the air pressure in the cabinet body is too high, the exhaust is performed by opening the exhaust electromagnetic valve; when the temperature in the cabinet body is too low, dry and cold air dehumidified in the dehumidifier can be guided into the heat dissipation cavity through the second sealing valve to be heated, and the heated air is discharged into the cabinet body through the switching valve, so that the problem that some electric elements cannot work normally due to the fact that the temperature in the cabinet body is too low can be well prevented; the air conditioner can be introduced with dry and cold air and dry and warm air, and can be selected according to different conditions, so that the air conditioner is more convenient to use; can let in the cabinet internal pressure boost after can't letting in dusty filtration, the dehumidification of outside when unable letting in inert gas, make its use more nimble, convenient, can continue to use inert gas to inflate after inert gas's partial maintenance is accomplished, need not to cut off the power supply to the switch board during, effectual work efficiency that has improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. The utility model provides an explosion-proof switch board of positive pressure type, includes the cabinet body (1) and cabinet door (2), its characterized in that: the improved multifunctional electric cabinet is characterized in that a first air inlet (3), a second air inlet (4), a first exhaust port (5) and a second exhaust port (6) are arranged on the cabinet body (1), a filter screen (8), an air inlet electromagnetic valve (9), an air inlet fan (10), a filter (11), a dehumidifier (12) and a switching valve (13) are sequentially arranged in the cabinet body (1) at the first air inlet (3), an air inlet pipe (7) connected with inert gas is arranged at the second air inlet (4), a control device (21) for controlling the inert gas to enter is arranged on the air inlet pipe (7), an exhaust electromagnetic valve (14) and a flame arrester (15) are sequentially arranged at the first exhaust port (5) from inside to outside, one side of the cabinet body (1) is movably hinged to the cabinet door (2), a controller (16) is arranged on the outer side of the cabinet body (1), and a pressure sensor (17) and a temperature detector (18) are arranged in the cabinet body (1);
the filter (11) comprises a filter housing (110), a dust collection cylinder (111), a sleeve (112), a guide pipe (113) and a filter element (114), wherein a dust collection air inlet (1100) is formed in the side wall of the filter housing (110), a dust collection air outlet (1101) is formed in the top end of the filter housing (110), the lower end of the filter housing (110) is in a conical shape, the dust collection cylinder (111) is movably connected to the lower end of the filter housing (110), the upper end of the sleeve (112) is fixedly connected to the top end of the inner wall of the filter housing (110), the lower end of the sleeve (112) is sleeved outside the guide pipe (113) and is provided with an air guide channel (115) in a gap with the outer wall of the guide pipe (113), the lower end of the sleeve (112) is fixedly connected with the guide pipe (113) through a plurality of connecting rods (116), the lower end of the guide pipe (113) extends into the guide pipe (111), the filter element (114) is fixed in the sleeve (112) and is provided with a gap with the inner wall of the sleeve (112), the lower end of the guide pipe (113) extends into the guide pipe (113), the dust collection cylinder opening, and the filter element (114) is connected with the dust collection air outlet (114);
the bus direction of the dust removal air inlet (1100) is superposed with the tangential direction of the side wall of the filter shell (110), and the outer wall of the lower end of the filter shell (110) is connected with the inner wall of the upper end of the dust collection cylinder (111) through threads;
the dehumidifier (12) comprises a dehumidifier shell (120), a semiconductor refrigeration sheet (121), a first sealing valve (122), a second sealing valve (123) and a third sealing valve (124), wherein the dehumidification chamber (1201) and the heat dissipation chamber (1202) are separated in the dehumidification shell (120) through a vertically arranged partition plate (1200), the semiconductor refrigeration sheet (121) is arranged on the partition plate (1200), the refrigeration end and the heating end of the semiconductor refrigeration sheet (121) are respectively arranged in the dehumidification chamber (1201) and the heat dissipation chamber (1202), the refrigeration end and the heating end of the semiconductor refrigeration sheet (121) are respectively provided with a cold-heat-conduction sheet (125) and a heat-temperature sheet (126), the bottom end in the dehumidifier shell (120) is provided with a water storage chamber (1203), the top end of the dehumidifier shell (120) is provided with a first inlet (1204) and a first outlet (1205) which are respectively communicated with the dehumidification chamber (1201) and the heat dissipation chamber (1202), the lower sides of the dehumidification chamber (1201) and the heat dissipation chamber (120) are respectively provided with a second outlet (1206) and a second sealing valve (123) which are communicated with the outside, and a lower side of the semiconductor refrigeration chamber (1202) is provided with a second air hole (1207), and a lower side of the semiconductor refrigeration chamber (1200) and a lower side partition plate (1200) and a lower side (1200) which are respectively communicated with a heat-conduction hole (1208), the first sealing valve (122) is arranged in the second outlet (1206), the second sealing valve (123) is arranged in the air guide hole (1208), and the third sealing valve (124) is arranged in the second inlet (1207).
2. The explosion-proof switch board of positive pressure type of claim 1, characterized in that: the first sealing valve (122), the second sealing valve (123) and the third sealing valve (124) are all the same in structure, the third sealing valve (124) comprises a base (1240), a sealing plate (1241), a connecting sleeve (1242), a fixing plate (1243), a fixing shaft (1244), a driving motor (1245) and a spring (1246), the outer side wall of the base (1240) is fixed on the inner wall of the second inlet (1207) in a sealing manner, a rotating groove (12400) is arranged on the base (1240), a first through hole (12401) matched with the sealing plate (1241) is formed in the groove bottom of the rotating groove (12400), the sealing plate (1241) is tightly attached to the groove bottom of the rotating groove (12400) to rotate, a square shaft (1247) is arranged on one side, away from the first through hole (connecting sleeve) (12401), of the sealing plate (1241), a connecting groove (12420) corresponding to and connected with the square shaft (7) in a sliding manner is arranged on the connecting sleeve (1242), the fixing plate (1243) is fixedly connected to the inner wall of the second inlet (1247) through the fixing plate (1244), the fixing plate (1243), the fixing shaft (1245) is fixed to the fixing shaft (1243), and the fixing shaft (1243) is connected to the fixing shaft (1243), and the fixing shaft (1243) and the fixing shaft (21) and the driving motor (21) is connected to the fixing plate (1243), a spring (1246) sleeved outside the connecting sleeve (1242) is arranged between the support ring (12421) and the sealing plate (1241).
3. The explosion-proof switch board of positive pressure type of claim 2, characterized in that: the groove wall of the rotating groove (12400) is provided with a sealing groove (12402) for the edge of the sealing plate (1241) to be rotatably connected, a first sealing ring (1248) is arranged in the sealing groove (12402), and the first sealing ring (1248) is connected with one side, far away from the connecting sleeve (1242), of the sealing plate (1241).
4. The explosion-proof switch board of positive pressure type of claim 2, characterized in that: the switching valve (13) comprises a valve body (130), a shaft sleeve (131), a valve rod (132) and a valve flap (133) which are arranged in the valve body (130), a valve cavity (135) is formed in one end of the valve body (130), a medium inlet (1300) communicated with the valve cavity (135), a first medium outlet (1301) and a second medium outlet (1302) are formed in the side wall of the valve body (130), the shaft sleeve (131) is tightly matched and connected with the inner wall of the opening of the valve cavity (135), a medium channel (1310) communicated with the valve cavity (135) is formed in one end, far away from the opening of the valve cavity (135), of the shaft sleeve (131), a plurality of second through holes (1311) communicated with the medium channel (1310) and the second medium outlet (1302) are formed in the side wall of the shaft sleeve (131), the valve flap (133) is fixedly connected to one end of the valve rod (132), the other end of the valve rod (132) sequentially penetrates through the medium channel (1310) and the shaft sleeve (131) to be connected with an output shaft of an external push rod (134), front and back end of the valve flap (133) are respectively provided with a sealing sheet (1330), two sealing sheets (1330) are respectively sleeved on the valve flap (133), two ends of the valve flap (132) and the first medium channel (1320), the first medium channel (1320) are respectively matched with the medium outlet (1320), two separation blade (1320) are established respectively on the front and back both ends of valve clack (133), separation blade (1320) on valve clack (133) front end and the inner chamber looks adaptation of first medium export (1301), separation blade (1320) on valve clack (133) rear end and the inner chamber looks adaptation of medium passageway (1310), be equipped with a plurality of second sealing washer (136) between the outer wall of axle sleeve (131) and the inner wall of valve pocket (135), be equipped with Y type sealing washer (137) between valve rod (132) and axle sleeve (131).
5. The explosion-proof switch board of positive pressure type of claim 4, characterized in that: the dust removal air outlet (1101) of the filter (11) is respectively communicated with a first inlet (1204) and a second inlet (1207) of a dehumidifier (12) through a first air duct (19), a second outlet (1206) of the dehumidifier (12) is communicated with the interior of the cabinet body (1), a first outlet (1205) of the dehumidifier (12) is connected with a medium inlet (1300) of a switching valve (13) through a second air duct (20), a first medium outlet (1301) of the switching valve (13) is communicated with a second air outlet (6), a one-way valve (22) which can only exhaust outwards is arranged in the second air outlet (6), and a second medium outlet (1302) of the switching valve (13) is communicated with the interior of the cabinet body (1).
6. The explosion-proof switch board of positive pressure type of claim 4, characterized in that: the air inlet electromagnetic valve (9), the air inlet fan (10), the semiconductor refrigeration piece (121), the driving motor (1245), the push rod motor (134), the control device (21), the exhaust electromagnetic valve (14), the pressure sensor (17) and the temperature detector (18) are all electrically connected with the controller (16).
7. Use method of a positive pressure explosion-proof distribution cabinet according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1: when a second air inlet is used for air intake, if the pressure sensor (17) detects that the pressure value in the cabinet body (1) is smaller than X, the controller (16) closes the air intake electromagnetic valve (9), the air intake fan (10), the air exhaust electromagnetic valve (14) and the first sealing valve (122), a push rod motor (134) of the driving switching valve (13) pulls back the valve rod (132) to seal the second medium outlet (1302), and the starting control device (21) is filled with inert gas until the pressure value is larger than X;
s2: when the first air inlet is used for air inlet, the controller (16) controls the control device (21) to stop filling inert gas, if the pressure sensor (17) detects that the pressure value in the cabinet body (1) is smaller than X, the exhaust electromagnetic valve (14) and the second sealing valve (123) are closed, the air inlet electromagnetic valve (9), the air inlet fan (10), the semiconductor refrigeration sheet (121), the first sealing valve (122) and the third sealing valve (124) are opened, and the push rod motor (134) of the driving switching valve (13) pulls back the valve rod (132) to seal the second medium outlet (1302);
s3: external air is sucked by an air inlet fan (10), enters a filter (11) through a filter screen (8), an air inlet electromagnetic valve (9) and the air inlet fan (10) in sequence and is filtered, the filtered air enters a dehumidifying cavity (1201) of a dehumidifier (12) from a first inlet (1204) through a first air duct (19) to be cooled and dehumidified, the dehumidified dry cold air enters the cabinet body (1) through a first sealing valve (122), and moisture on a cold temperature guide sheet (125) is gathered and dripped in a water storage cavity (1203) to be collected;
s4: meanwhile, filtered air enters a heat dissipation cavity (1202) of the dehumidifier (12) through a first air duct (19) and a third sealing valve (124) to help a heat conduction temperature sheet (126) of a semiconductor refrigeration sheet (121) to dissipate heat, and heated hot air enters a valve cavity (135) of the switching valve (13) through a first outlet (1205) and a second air duct (20) and is then discharged out of the cabinet body (1) through a first medium outlet (1301) and a second exhaust port (6);
s5: when the pressure sensor (17) detects that the pressure value in the cabinet body (1) reaches X, the pressure sensor (17) sends a signal to the controller (16), the controller (16) controls the air inlet electromagnetic valve (9), the air inlet fan (10), the semiconductor refrigeration sheet (121) and the first sealing valve (122) to be closed, inflation is stopped, and the switching valve (13) keeps the sealing state of the second medium outlet (1302);
s6: when the pressure sensor (17) detects that the pressure value in the cabinet body (1) exceeds Y, Y is larger than X, the exhaust electromagnetic valve (14) is opened until the pressure value is smaller than Y, and then the exhaust electromagnetic valve (14) is closed;
s7: when the temperature detector (18) detects that the temperature in the cabinet body (1) is lower than Z and the pressure value in the cabinet body (1) is smaller than Y, the controller (16) controls the air inlet electromagnetic valve (9), the air inlet fan (10), the semiconductor refrigeration sheet (121) and the second sealing valve (123) to be opened, the first sealing valve (122) and the third sealing valve (124) are closed, and the push rod motor (134) of the switching valve (13) pushes the valve rod (132) to seal the first medium outlet (1301);
s8: external air is sucked by the air inlet fan (10), enters the filter (11) through the filter screen (8), the air inlet electromagnetic valve (9) and the air inlet fan (10) in sequence and is filtered, the filtered air enters the dehumidification cavity (1201) of the dehumidifier (12) from the first inlet (1204) through the first air duct (19) to be cooled and dehumidified, then enters the heat dissipation cavity (1202) through the second sealing valve (123) to be heated, the heated dry warm air enters the valve cavity (135) of the switching valve (13) through the first outlet (1205) and the second air duct (20), and is discharged into the cabinet body (1) from the second medium outlet (1302) of the switching valve (13).
CN202110080577.8A 2021-01-21 2021-01-21 Positive pressure type explosion-proof power distribution cabinet and use method thereof Active CN112864929B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110080577.8A CN112864929B (en) 2021-01-21 2021-01-21 Positive pressure type explosion-proof power distribution cabinet and use method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110080577.8A CN112864929B (en) 2021-01-21 2021-01-21 Positive pressure type explosion-proof power distribution cabinet and use method thereof

Publications (2)

Publication Number Publication Date
CN112864929A CN112864929A (en) 2021-05-28
CN112864929B true CN112864929B (en) 2022-12-27

Family

ID=76008642

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110080577.8A Active CN112864929B (en) 2021-01-21 2021-01-21 Positive pressure type explosion-proof power distribution cabinet and use method thereof

Country Status (1)

Country Link
CN (1) CN112864929B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113157021B (en) * 2021-06-04 2021-12-21 镇江云聚信息科技有限公司 Temperature control device of intelligent cloud cabinet based on internet of things

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101997271B (en) * 2010-10-26 2012-08-22 南通金茂防爆电气有限公司 Power distribution cabinet of positive voltage explosion-proof instrument
CN108321704B (en) * 2018-02-27 2020-04-28 张乃月 Explosion-proof positive-pressure power distribution cabinet
CN211720856U (en) * 2020-01-16 2020-10-20 河南华隆电气设备有限公司 Positive pressure type explosion-proof cabinet
CN211579274U (en) * 2020-08-12 2020-09-25 天津润锦油田技术服务有限公司 Positive pressure explosion-proof control cabinet

Also Published As

Publication number Publication date
CN112864929A (en) 2021-05-28

Similar Documents

Publication Publication Date Title
CN107202396B (en) Dual cycle formula new trend system and new fan
CN207853281U (en) A kind of dehumidifying dedusting cooling noise reduction integration electrical cabinet
CN112864929B (en) Positive pressure type explosion-proof power distribution cabinet and use method thereof
CN209317238U (en) A kind of painting workshop dust treatment system
CN113124491A (en) Intelligent dehumidifying fresh air system
CN206875593U (en) A kind of high-temperature dehumidifier
CN108376926B (en) Intelligent power distribution cabinet with dustproof and heat dissipation functions for power system
CN211025468U (en) Dust removal and dehumidification device for flour processing factory building
CN111355159B (en) Remote operation switch cabinet
CN113230574A (en) Dry dampproofing portable fire control that has self-checking function patrols and examines cabinet
CN103845994B (en) A kind of dehydrating unit for rays safety detection apparatus
CN208588027U (en) A kind of humidifier with purification function
CN216778275U (en) Multifunctional gas filtering equipment
CN202545198U (en) Air compressor filtering, dehumidifying and cooling air inlet treatment device
CN210573450U (en) Temperature and humidity control device for indoor environment purification regulation
CN110568887A (en) temperature and humidity control device for indoor environment purification regulation
CN219458452U (en) Dehumidification looped netowrk cabinet
CN217887485U (en) Zero-gas-consumption compression heat regeneration adsorption type dryer
CN219995711U (en) Drying device
CN203764097U (en) Dehumidification device for security inspection equipment
CN117293690B (en) Electrical engineering automation control cabinet and safety monitoring system in cabinet
CN217929492U (en) Corrosion-resistant heat pump drying device
CN216116977U (en) A quick sampling device for detecting waste gas of mill
CN211837155U (en) Low dew point runner configuration of dehumidification equipment
CN219934172U (en) Automatic fire-fighting smoke discharging device with emergency effect

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right

Effective date of registration: 20221208

Address after: No. 73, Xianfeng Village, Huaxi Street, Banan District, Chongqing 401320 (Xianfeng Park)

Applicant after: Chongqing Xinbeidi Electric Co.,Ltd.

Address before: 325000 Room 102, building 4, shibajiaxin village, Wuma street, Lucheng District, Wenzhou City, Zhejiang Province

Applicant before: He Shaogu

TA01 Transfer of patent application right
GR01 Patent grant
GR01 Patent grant