WO2021243913A1 - 一种防沙尘的华式箱变开关柜 - Google Patents

一种防沙尘的华式箱变开关柜 Download PDF

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Publication number
WO2021243913A1
WO2021243913A1 PCT/CN2020/119553 CN2020119553W WO2021243913A1 WO 2021243913 A1 WO2021243913 A1 WO 2021243913A1 CN 2020119553 W CN2020119553 W CN 2020119553W WO 2021243913 A1 WO2021243913 A1 WO 2021243913A1
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WO
WIPO (PCT)
Prior art keywords
frame
plate
dust
proof
board
Prior art date
Application number
PCT/CN2020/119553
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English (en)
French (fr)
Inventor
周智
黄志文
王蕾
Original Assignee
华翔翔能科技股份有限公司
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Publication of WO2021243913A1 publication Critical patent/WO2021243913A1/zh

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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
    • 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
    • H02B1/01—Frameworks
    • H02B1/013—Profiles for cabinet frames
    • 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
    • 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

Definitions

  • the present invention relates to the technical field of electrical equipment, in particular to a sand-dust-proof switchgear for a Chinese box-type substation.
  • Box substation switchgear refers to a kind of electrical equipment in which transformers, high-voltage switch components and low-voltage switchgear components are all placed in the cabinet. It has the advantages of high integration, easy installation and wide application range; it is widely installed in power stations and applications.
  • the electrical load point is used to boost or buck the input power.
  • Box transformer switchgear is divided into American box transformer switchgear, European box transformer switchgear and Chinese box transformer switchgear;
  • American box transformer switchgear is the transformer, high voltage load switch, fuse and other components are all put into the transformer tank, because The components are immersed in oil, and the volume of the components is greatly reduced, so the structure of the American box-substation switchgear is more compact;
  • the European-style box-substation switchgear refers to the transformer and ordinary high-voltage electrical equipment installed in the same metal shell with internal compartments In the box, the box is equipped with complete electrical equipment such as transformers, high-voltage load switches, fuses, and low-voltage switches, so the European-style box substation has a larger volume.
  • the Hua-style box substation switchgear combines the advantages of American and European styles. It not only retains the box body and integrates complete electrical equipment, but also has a compact design of the box body, which is more compact than the European-style box substation switchgear.
  • the existing Hua-style box-substation switchgear is often installed outdoors. In some areas with harsh weather, such as areas with frequent sand and dust (such as northwest China), the Hua-style box-substation switchgear is required to have good sand and dust resistance. Otherwise, the sand and dust will invade the box, which will seriously affect the normal operation of the electrical equipment in the box (such as causing equipment short circuit); however, the existing China-style box substation switchgear is generally weak in anti-sand and dust capabilities and needs to be improved.
  • the main purpose of the present invention is to provide a sand-and-dust-proof Chinese-style box-substation switchgear, which aims to solve the problem that the existing Chinese-style box-substation switchgear has a generally weak anti-sand and dust capability.
  • a sand and dust-proof Chinese-style box-type substation switchgear includes a box body and a dust-proof component;
  • the box body includes a first side plate, a second side plate, a third side plate and a fourth side plate all vertically arranged , And horizontally arranged top and bottom plates;
  • the first side plate and the second side plate are parallel to and opposite to each other;
  • the third side plate and the fourth side plate are parallel to and opposite to each other;
  • the top plate And the bottom plate are directly opposite to each other;
  • the first side panel is provided with a first vent; the second side panel is provided with a second vent; the third side panel is provided with a third vent; the size of the first vent, the The size of the second vent is the same as the size of the third vent;
  • the dust-proof assembly includes a ventilated and dust-proof frame;
  • the ventilated and dust-proof frame includes an outer frame, a blocking box, an axial fan, and a gauze frame;
  • the outer frame includes a first frame board, a second frame board, a third frame board, a fourth frame board, and a fifth frame board; the first frame board and the second frame board are both vertically arranged and aligned with each other. Opposite; the third frame board and the fourth frame board are arranged horizontally and located on the same horizontal plane; the fifth frame board is arranged horizontally and located below the third frame board; the fifth frame board is connected respectively At the bottom of the first frame board and the bottom of the second frame board; the third frame board and the fourth frame board are both rectangular boards and have the same size, and both sides of the third frame board Respectively connected to the top of the first frame board and the top of the second frame board, and the two side edges of the fourth frame board are respectively connected to the top of the first frame board and the top of the second frame board; A rectangular gap is formed between the third frame board and the fourth frame board;
  • the barrier insert box includes a support plate and a filter paper board; the number of the filter paper board is multiple; a plurality of the filter paper boards are connected to one side of the support board in a staggered manner; the filter paper board can be inserted into the rectangular gap When the filter paperboard is completely inserted into the rectangular gap, the support plate sealingly covers the rectangular gap;
  • the inside of the outer frame is provided with the axial fan directly below the third frame plate; the gauze frame is embedded in the outer frame; the gauze frame includes a net frame and Gauze; when the gauze frame is embedded in the outer frame, the outer peripheral wall of the frame is connected to the first frame plate, the second frame plate, the fourth frame plate and the The fifth frame board contact;
  • the number of the ventilation and dust-proof frames is three; the three ventilation and dust-proof frames respectively correspond to the first vent, the second vent, and the third vent; and the first vent
  • the end of the outer frame of the ventilating dust-proof frame close to the third frame plate corresponding to the opening is connected to the outer wall of the first side plate and covers the first vent
  • the second The end of the outer frame of the ventilating dust-proof frame corresponding to the ventilating and dust-proof frame is connected to the outer wall of the second side plate in a sealed manner and covering the second vent;
  • One end of the outer frame of the ventilating dust-proof frame corresponding to the three vents is connected to the outer wall of the third side plate in a sealing manner, and the third vent is covered.
  • the filter paper board is vertically connected to one side surface of the support plate; the extension direction of the filter paper board is perpendicular to the first frame board; the horizontal section of the filter paper board is zigzag;
  • the bottom of the filter paperboard is in contact with the fifth frame plate, and the adjacent filter paperboards are respectively connected to the first frame plate and the second frame plate. Frame plate contact.
  • the filter paperboard is a cotton fiber filter paperboard.
  • the number of the filter paper sheets is at least 4.
  • connection between one of the ventilation and dust-proof frames and the outer wall of the first side plate is welding; and the connection between one of the ventilation and dust-proof frames and the second side plate is It is welding; the connection between one of the ventilation and dust-proof frames and the third side plate is welding.
  • the gap between the support plate and the outer frame is coated with a silicone sealant.
  • the box body further includes a first inner panel and a second inner panel; the first inner panel is parallel to the third side panel; the second inner panel is perpendicular to the third side panel; The first inner plate is respectively connected to the inner wall of the first side plate and the inner wall of the second side plate; the second inner plate is respectively connected to the inner wall of the fourth side plate and the second inner plate ;
  • the first vent penetrates the high-pressure chamber; the second vent penetrates the low-pressure chamber; the third vent penetrates the variable pressure chamber; the first inner plate is opened at the high-pressure chamber There is a first through hole; the second inner plate is provided with a second through hole at the low pressure chamber.
  • the ventilating and dust-proof frame further includes a handle; the handle is connected to a side of the support plate away from the filter cardboard.
  • the gauze is a stainless steel gauze.
  • the outer wall of the top plate is connected with lifting lugs.
  • the present invention has at least the following beneficial effects:
  • the sand-and-dust-proof China-style box-substation switchgear provided by the present invention has excellent sand-and-dust resistance.
  • the box body of the sand-and-dust-proof China-style box-substation switchgear consists of a first side plate, a second side plate, The third side plate, the fourth side plate, the top plate and the bottom plate are formed, and the plates are welded and sealed to ensure the tightness of the connection; the box body is only provided with the first vent, the second vent and the third vent It is used to ventilate and dissipate heat from the outside.
  • the outside of the first vent, the second vent and the fourth vent are all covered with a ventilating dust-proof frame;
  • the ventilating dust-proof frame includes a gauze frame, a filter board and an axial fan, Under the action of the flow fan, the outside air passes through the gauze frame, the filter cardboard and enters the box in sequence.
  • the air passes through the gauze frame most of the dust particles contained in the air will be filtered and blocked by the gauze frame, and then pass through the staggered arrangement.
  • the filter paperboard is used, the interlaced structure of the filter paperboard can further block the finer dust particles that the gauze cannot filter, so that the amount of sand and dust in the air that finally enters the box is greatly reduced, and the sand prevention is greatly improved.
  • the dustproof China-style box substation switchgear has the ability to prevent sand and dust, while also taking into account the heat dissipation and ventilation capabilities.
  • Figure 1 is a three-dimensional schematic diagram of an embodiment of a sand-dust-proof Chinese box-type substation switchgear according to the present invention
  • Fig. 2 is a schematic top view of an embodiment of a sand-dust-proof Chinese box-type substation switchgear according to the present invention
  • FIG. 3 is a schematic diagram of a horizontal cross-sectional structure of a ventilation and dust-proof frame of an embodiment of a sand and dust-proof Chinese box-type substation switchgear according to the present invention
  • FIG. 4 is a three-dimensional schematic diagram of the first movable door and the first operating port of an embodiment of a sand-dust-proof Chinese box-type substation switchgear according to the present invention.
  • First side board 380 Filter paper 120 Second side panel 391 Screen frame 130 Third side panel 392 Gauze 140 Fourth side panel 410 Limit bar 150 Bottom plate 420 Axial Fan 160 roof 500 First movable door 170 First inner panel 510 Exterior doors 180 Second inner panel 520 Inner sealing block 210 High pressure chamber 530 Highlight bar 220 High-voltage switchgear 600 Second movable door 230 Low pressure room 111 First vent 240 Low-voltage cabinet 121 Second vent 250 Transformer room 131 Third vent 260 transformer 141 The first operation port 300 Ventilation and dustproof frame 143 The second operation port 310 First frame board 171 First through hole 320 Second frame board 172 Second through hole 330 Third frame board 430 Rectangular gap 340 Fourth frame board 142 Groove 350 Fifth frame board 360 Support plate
  • the terms “connected”, “fixed”, etc. should be interpreted in a broad sense.
  • “fixed” can be a fixed connection, a detachable connection, or a whole; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be a communication between two elements or an interaction relationship between two elements, unless specifically defined otherwise.
  • “fixed” can be a fixed connection, a detachable connection, or a whole; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be a communication between two elements or an interaction relationship between two elements, unless specifically defined otherwise.
  • the present invention provides a sand-dust-proof Hua-type box-type substation switchgear.
  • the sand-and-dust-proof Chinese-style box-substation switchgear includes a box body 100 and dust-proof components; the box body 100 includes both The first side plate 110, the first side plate 120, the third side plate 130, and the fourth side plate 140 are vertically arranged, and the top plate 160 and the bottom plate 150 are arranged horizontally; the first side plate 110 and the first side plate 120 are mutually Parallel and directly opposite; the third side plate 130 and the fourth side plate 140 are parallel and directly opposite to each other; the top plate 160 and the bottom plate 150 are directly opposite to each other. That is, the above 6 plates constitute the box body 100, and the plates are connected by welding to ensure the tightness of the connection.
  • the first side plate 110 is provided with a first vent 111; the first side plate 120 is provided with a second vent 121; the third side plate 130 is provided with a third vent 131; the size of the first vent 111 and the second vent
  • the size of the opening 121 and the size of the third vent 131 are the same.
  • the first vent 111 and the second vent 121 allow users to enter outside air
  • the third vent 131 is used to exhaust the air in the box 100 to ensure the heat dissipation of the entire box 100.
  • the dust-proof assembly includes a ventilated and dust-proof frame 300; the ventilated and dust-proof frame 300 includes an outer frame, a barrier insert box, an axial fan 420, and a gauze frame.
  • the outer frame includes a first frame plate 310, a second frame plate 320, a third frame plate 330, a fourth frame plate 340, and a fifth frame plate 350;
  • the first frame plate 310 and the second frame plate 320 are both vertically arranged and mutually Directly opposite;
  • the third frame board 330 and the fourth frame board 340 are horizontally arranged and located on the same horizontal plane;
  • the fifth frame board 350 is horizontally arranged and located below the third frame board 330;
  • the fifth frame board 350 is respectively connected to the first frame
  • the third frame board 330 and the fourth frame board 340 are rectangular boards and have the same size, and the two sides of the third frame board 330 are respectively connected to the first frame board 310
  • the top and the top of the second frame board 320, the two side edges of the fourth frame board 340 are respectively connected to the top of the first frame board 310 and the top of the second frame board 320;
  • the bottom plate 150 of the box body 100 is in contact with the ground and is set horizontally. Therefore, the position of the ventilating and dust-proof frame 300 is relatively fixed, that is, the outer frame is a frame with two ends open and a rectangular notch 430 on the top. .
  • the barrier insert box includes a supporting board 360 and a filter board 380; the number of filter boards 380 is multiple; the multiple filter boards 380 are connected to one side of the supporting board 360 in a staggered manner; When the plate 380 is completely inserted into the rectangular notch 430, the supporting plate 360 seals and covers the rectangular notch 430.
  • the blocking plug-in box is inserted from the rectangular gap 430, so that the filter paperboard 380 is completely inserted into the outer frame to block the passing air to a certain extent, extend the distance of the passing air, and reduce the dust particles contained in the air from entering the box 100 The odds.
  • the filter board 380 under the support plate 360, and make the entire barrier insert box a structure that can be inserted into the outer frame to facilitate the replacement of the filter board 380. Because the filter board 380 is a consumable material, when the filter board 380 is corroded by dust When the contamination reaches a certain level, the filter board 380 needs to be replaced. At this time, it is only necessary to withdraw the entire barrier insert box for replacement.
  • the inside of the outer frame is provided with an axial fan 420 directly below the third frame plate 330; the gauze frame is embedded in the outer frame; the gauze frame includes a net frame 391 and a gauze 392 arranged inside the net frame 391;
  • the outer wall of the screen frame 391 is in contact with the first frame plate 310, the second frame plate 320, the fourth frame plate 340, and the fifth frame plate 350 respectively, that is, between the screen frame 391 and the outer frame
  • the contact is a detachable sealed contact (interference contact) to ensure that external dust will not enter the outer frame from the gap.
  • the number of ventilation and dustproof frames 300 is three; the three ventilation and dustproof frames 300 respectively correspond to the first vent 111, the second vent 121 and the third vent 131; the ventilation and dustproof corresponding to the first vent 111
  • One end of the outer frame of the frame 300 close to the third frame plate 330 is connected to the outer wall of the first side plate 110 in a sealed manner and is provided with a first vent 111;
  • the end close to the third frame plate 330 is sealed to the outer wall of the first side plate 120 and covers the second vent 121;
  • the outer frame of the ventilated dust-proof frame 300 corresponding to the third vent 131 is close to the third frame plate 330
  • One end of the connector is sealed to the outer wall of the third side plate 130 and covers the third vent 131.
  • two of the above-mentioned three ventilation and dust-proof frames 300 suck the outside air into the box 100, and one of them is to exhaust the air in the box 100 out of the box 100, so it is connected with the first vent 111 and the second ventilation
  • the wind direction of the axial fan 420 in the ventilating dust-proof frame 300 through which the opening 121 passes is set to blow from the outside into the cabinet 100, and the wind direction of the axial fan 420 in the ventilating dust-proof frame 300 through the third vent 131 is set It is set to blow from the inside of the box 100 to the outside.
  • the sand-and-dust-proof China-style box-substation switchgear provided by the present invention has excellent sand-and-dust resistance.
  • the box body 100 of the sand-and-dust-proof China-style box-substation switchgear is composed of a first side plate 110 and a first side.
  • the plate 120, the third side plate 130, the fourth side plate 140, the top plate 160 and the bottom plate 150 are formed by welding and sealing between the plates to ensure the tightness of the connection;
  • the box body 100 is provided with only the first vent 111,
  • the second vent 121 and the third vent 131 are used to ventilate and dissipate heat from the outside, and the outside of the first vent 111, the second vent 121 and the fourth vent are all covered with a ventilation and dust-proof frame 300;
  • 300 includes a gauze frame, a filter board 380 and an axial flow fan 420. Under the action of the axial flow fan 420, the outside air passes through the gauze frame, the filter board 380 and enters the box 100 in turn. The air passes through the gauze frame.
  • the staggered structure of the filter paperboard 380 can further block the finer dust particles that the gauze 392 cannot filter. Therefore, the amount of sand and dust in the air finally entering the box body 100 is greatly reduced, which greatly improves the sand and dust resistance of the sand-and-dust-proof China-style box-type substation switchgear, while also taking into account the heat dissipation and ventilation capabilities.
  • the filter paper 380 is vertically connected to one side of the support plate 360 (that is, the filter paper 380 is vertically arranged); the extension direction of the filter paper 380 is perpendicular to the first frame plate 310 ; The horizontal section of the filter paperboard 380 is sawtooth.
  • the filter paperboard 380 is completely inserted into the rectangular notch 430, the bottom of the filter paperboard 380 contacts the fifth frame plate 350, and the adjacent filter paperboards 380 contact the first frame plate 310 and the second frame plate 320, respectively.
  • the above-mentioned filter paperboard 380 is a cotton fiber filter paperboard, and the cotton fiber filter paperboard has an excellent effect of adsorbing impurity particles, and has a wide range of sources and is relatively practical.
  • the number of filter paperboards 380 is at least four (preferably four in this embodiment). As shown in FIG. 3, the four filter paperboards 380 are staggered to form a circuitous air circulation path, which improves the effect of filtering dust. .
  • the filter board 380 closest to the axial flow fan 420 is also provided with a limit bar 410 on the side close to the axial flow fan 420.
  • the two ends of the limit bar 410 are respectively connected to the inner wall of the first frame plate 310 and the second frame plate.
  • the limit bar 410 is to prevent the axial flow fan 420 from generating excessive suction on the filter paper 380 and cause the filter paper 380 to deviate from its original position.
  • limit bars 410 can also be provided.
  • the number of limit bars 410 is the same as the number of filter paperboards 380, and the limit bars 410 correspond to the filter paperboard 380 one-to-one.
  • the limit bars 410 are respectively located on the side of the corresponding filter paperboard 380 close to the axial flow fan 420. This arrangement is to prevent the wind force of the axial flow fan 420 from causing the filter paperboard 380 to shift and accumulate together, resulting in the circulation of outside air. The amount is greatly reduced.
  • the ventilating dust-proof frame 300 through the third vent 131 may not be provided with the filter paper 380, because the axial fan 420 of the ventilating dust-proof frame 300 blows the air in the box 100 to the outside, so it is not
  • the filter paperboard 380 is needed to enhance the filtering effect, and only needs to have the effect of exhausting.
  • connection method between one of the ventilating and dust-proof frame 300 and the outer wall of the first side plate 110 is welding; the connection method between one of the ventilating and dust-proof frame 300 and the first side plate 120 is welding; The connection between the ventilating and dustproof frame 300 and the third side plate 130 is welding.
  • the above-mentioned welding connection is to ensure the sealing performance of the connection between the ventilation and dust-proof frame 300 and the box body 100.
  • the gap between the support plate 360 and the outer frame is coated with a silicone sealant (not shown).
  • the silicone sealant is also applied to prevent external dust and impurities from the gap.
  • the box body 100 further includes a first inner plate 170 and a second inner plate 180; the first inner plate 170 is parallel to the third side plate 130; the second inner plate 180 is perpendicular to The third side plate 130; the first inner plate 170 is respectively connected to the inner wall of the first side plate 110 and the inner wall of the first side plate 120; the second inner plate 180 is respectively connected to the inner wall of the fourth side plate 140 and the second inner plate 180.
  • the first inner plate 170, the second inner plate 180, the first side plate 110, the fourth side plate 140, the top plate 160 and the bottom plate 150 together constitute the high pressure chamber 210; the first inner plate 170, the second inner plate 180, the first side The plate 120, the fourth side plate 140, the top plate 160 and the bottom plate 150 jointly constitute the low pressure chamber 230; the first inner plate 170, the first side plate 110, the first side plate 120, the third side plate 130, the top plate 160 and the bottom plate 150 share a common
  • the transformation chamber 250 is constituted.
  • a high-voltage cabinet 220 is installed in the high-voltage room 210, a low-voltage cabinet 240 is installed in the low-voltage room 230, and a transformer 260 is installed in the transformation room 250. All electrical equipments are placed in one space and cause adverse interference to each other, and the overall structure is clearer.
  • the first vent 111 penetrates the high-pressure chamber 210; the second vent 121 penetrates the low-pressure chamber 230; the third vent 131 penetrates the transformer chamber 250; the first inner plate 170 is provided with a first through hole 171 at the high-pressure chamber 210; The second inner plate 180 defines a second through hole 172 at the low pressure chamber 230.
  • the box 100 is spatially split and arranged to form three different spaces, the positions of the three vents need to be adjusted. Through the above technical solution, the ventilation and heat dissipation effects of the box 100 are not affected. .
  • the outer wall of the top plate 160 is also connected with lifting lugs (not shown) to facilitate transportation.
  • the ventilating and dust-proof frame 300 further includes a handle 370; the handle 370 is connected to a side of the support plate 360 away from the filter cardboard 380.
  • the handle 370 By providing the handle 370, it is more convenient to lift or insert the above-mentioned barrier plug-in box.
  • the aforementioned gauze 392 is a stainless steel gauze, and the durability of the stainless steel gauze is better.
  • the fourth side plate 140 is provided with a first operating port 141 and a second operating port 143.
  • the first operating port 141 communicates with the high-pressure chamber 210
  • the second operating port 143 communicates with the low-pressure chamber 230
  • the first operating port 141 is
  • the second operation port 143 is to facilitate the maintenance personnel to operate the low-voltage cabinet 240 in the low-voltage chamber 230 from outside the cabinet 100;
  • the outer wall is also hingedly provided with a first movable door 500 and a second movable door 600. The first movable door 500 is used to seal and cover the first operation port 141, and the second movable door 600 is used to seal and cover the second operation port 143.
  • the structures of the first movable door 500 and the second movable door 600 are the same, and the structures of the first operation port 141 and the second operation port 143 are the same.
  • the first movable door 500 and the first operation port 141 are used as Take an example to illustrate the matching structure of the two, and the matching structure between the second movable door 600 and the second operating port 143 will not be repeated.
  • the first movable door 500 includes an outer door 510 and an inner sealing block 520.
  • the inner sealing block 520 is connected to a side surface of the outer door 510 close to the first operation opening 141.
  • the first operation opening 141 is a rectangular opening, and the inner sealing block 520 is also A rectangular block, the edge of the first operating port 141 is provided with a circumferential groove 142, and the outer edge of the inner sealing block 520 is provided with a circumferential protruding strip 530.
  • the inner sealing block 520 is inserted into the In an operating port 141, and the protruding strip 530 is embedded in the groove 142, the protruding strip 530 is preferably made of rubber and has a smooth surface.

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Abstract

本发明公开了一种防沙尘的华式箱变开关柜，包括箱体和防尘组件；所述箱体包括均竖直设置的第一侧板、第二侧板、第三侧板和第四侧板，以及水平设置的顶板和底板；所述第一侧板和所述第二侧板彼此平行且正相对；所述第三侧板和所述第四侧板彼此平行且正相对；所述顶板和所述底板彼此正相对；所述第一侧板开设有第一通风口；所述第二侧板开设有第二通风口；所述第三侧板开设有第三通风口；滤纸板的交错式结构能够进一步阻挡纱网未能过滤的更细小的沙尘颗粒，从而使得最终进入箱体的空气还有的沙尘量大大降低，大大提升了本防沙尘的华式箱变开关柜的防沙尘能力，同时还能兼顾散热通风能力。

Description

一种防沙尘的华式箱变开关柜
本申请基于申请号为202010490026.4、申请日为2020年6月2日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及电气设备技术领域，特别涉及一种防沙尘的华式箱变开关柜。
背景技术
箱变开关柜，是指将变压器和高压开关元件及低压开关柜元件全部置于箱体的一种电气设备，具有集成度高，便于安装和应用范围广的优点；广泛安装于发电站和用电负荷点，用于对输入电力进行升压或者降压。
箱变开关柜分为美式箱变开关柜、欧式箱变开关柜和华式箱变开关柜；美式箱变开关柜是将变压器、高压负荷开关、熔断器等元件全部放入变压器油箱内，因元件浸在油中，元件体积大为缩小，所以美式箱变开关柜的结构更为紧凑；欧式箱变开关柜是指将变压器及普通的高压电器设备装于同一个内设隔间的金属外壳箱体中，箱体中设置有变压器、高压负荷开关、熔断器和低压开关等完善的电气设备，所以欧式箱变体积较大。而华式箱变开关柜综合了美式和欧式的优点，既保留了箱体，集成了完善的电气设备，又将箱体进行了紧凑式设计，结构比欧式箱变开关柜更加紧凑。
现有的华式箱变开关柜经常安装于户外，在某些气候较为恶劣的地区，如经常刮沙尘的地区(如中国西北地区)，需要华式箱变开关柜具备良好的防沙尘能力，否则沙尘侵入箱体内，会严重影响箱体内各电气设备的正常运行(如引起设备短路)；但现有的华式箱变开关柜的防沙尘能力普遍较弱，有待提升。
发明内容
本发明的主要目的是提供一种防沙尘的华式箱变开关柜，旨在解决现有的华式箱变开关柜的防沙尘能力普遍较弱的问题。
为实现上述目的，本发明提出的技术方案是：
一种防沙尘的华式箱变开关柜，包括箱体和防尘组件；所述箱体包括均竖直设置的第一侧板、第二侧板、第三侧板和第四侧板，以及水平设置的顶板和底板；所述第一侧板和所述第二侧板彼此平行且正相对；所述第三侧板和所述第四侧板彼此平行且正相对；所述顶板和所述底板彼此正相对；
所述第一侧板开设有第一通风口；所述第二侧板开设有第二通风口；所述第三侧板开设有第三通风口；所述第一通风口的尺寸、所述第二通风口的尺寸及所述第三通风口的尺寸一致；
所述防尘组件包括通风防尘框；所述通风防尘框包括外框、阻隔插盒、轴流风机和纱网 框；
所述外框包括第一框板、第二框板、第三框板、第四框板和第五框板；所述第一框板和所述第二框板均竖直设置且彼此正相对；所述第三框板和所述第四框板均水平设置且位于同一水平面；所述第五框板水平设置且位于所述第三框板的下方；所述第五框板分别连接于所述第一框板的底部和所述第二框板的底部；所述第三框板和所述第四框板均为矩形板且尺寸一致，所述第三框板的两侧边缘分别连接于所述第一框板的顶部和第二框板的顶部，所述第四框板的两侧边缘分别连接于所述第一框板的顶部和所述第二框板的顶部；所述第三框板和所述第四框板之间形成有矩形缺口；
所述阻隔插盒包括支撑板和滤纸板；所述滤纸板的数量为多个；多个所述滤纸板交错式连接于所述支撑板的一侧面；所述滤纸板能插入所述矩形缺口中，且当所述滤纸板完全插入所述矩形缺口中时，所述支撑板密封盖住所述矩形缺口；
所述外框的内部于所述第三框板正下方设置有所述轴流风机；所述纱网框嵌入所述外框中；所述纱网框包括网框和设置于网框内部的纱网；当所述纱网框嵌入所述外框中时，所述网框的周向外壁分别与所述第一框板、所述第二框板、所述第四框板和所述第五框板接触；
所述通风防尘框的数量为3个；3个所述通风防尘框分别与所述第一通风口、所述第二通风口及所述第三通风口对应；与所述第一通风口对应的所述通风防尘框的所述外框的靠近所述第三框板的一端密封连接于所述第一侧板的外壁并罩设所述第一通风口；与所述第二通风口对应的所述通风防尘框的所述外框的靠近所述第三框板的一端密封连接于所述第二侧板的外壁并罩设所述第二通风口；与所述第三通风口对应的所述通风防尘框的所述外框的靠近所述第三框板的一端密封连接于所述第三侧板的外壁并罩设所述第三通风口。
优选的，所述滤纸板竖直连接于所述支撑板的一侧面；所述滤纸板的延伸方向垂直于所述第一框板；所述滤纸板的水平截面呈锯齿型；
当所述滤纸板完全插入所述矩形缺口中时，所述滤纸板的底部与所述第五框板接触，且相邻的所述滤纸板分别与所述第一框板及所述第二框板接触。
优选的，所述滤纸板为棉纤维滤纸板。
优选的，所述滤纸板的数量为至少4个。
优选的，其中1个所述通风防尘框与所述第一侧板的外壁之间的连接方式为焊接；其中1个所述通风防尘框与所述第二侧板之间的连接方式为焊接；其中1个所述通风防尘框与所述第三侧板之间的连接方式为焊接。
优选的，当所述支撑板密封盖住所述矩形缺口时，所述支撑板与所述外框之间的缝隙处涂抹设置有硅胶密封胶。
优选的，所述箱体还包括第一内板和第二内板；所述第一内板平行于所述第三侧板；所述第二内板垂直于所述第三侧板；所述第一内板分别连接于所述第一侧板的内壁和所述第二侧板的内壁；所述第二内板分别连接于所述第四侧板的内壁及所述第二内板；
所述第一内板、所述第二内板、所述第一侧板、所述第四侧板、所述顶板和所述底板共 同构成高压室；所述第一内板、所述第二内板、所述第二侧板、所述第四侧板、所述顶板和所述底板共同构成低压室；所述第一内板、所述第一侧板、所述第二侧板、所述第三侧板、所述顶板和所述底板共同构成变压室；
所述第一通风口贯通所述高压室；所述第二通风口贯通所述低压室；所述第三通风口贯通所述变压室；所述第一内板于所述高压室处开设有第一通孔；所述第二内板于所述低压室处开设有第二通孔。
优选的，所述通风防尘框还包括拉手；所述拉手连接于所述支撑板的远离所述滤纸板的一侧面。
优选的，所述纱网为不锈钢纱网。
优选的，所述顶板的外壁连接设置有吊耳。
与现有技术相比，本发明至少具备以下有益效果：
本发明提出的防沙尘的华式箱变开关柜具备优秀的防沙尘能力，具体的，本防沙尘的华式箱变开关柜的箱体由第一侧板、第二侧板、第三侧板、第四侧板、顶板和底板构成，各板材之间为焊接密封，以保证连接处的密封性；箱体只开设有第一通风口、第二通风口和第三通风口用以与外界通风散热，第一通风口、第二通风口和第四通风口的外部均罩设有通风防尘框；通风防尘框包括纱网框、滤纸板和轴流风机，在轴流风机的作用下，外界空气依次经过纱网框、滤纸板并进入箱体内，空气在经过纱网框时空气中包含的大部分沙尘颗粒都会被纱网框过滤阻挡，然后在经过交错设置的滤纸板时，滤纸板的交错式结构能够进一步阻挡纱网未能过滤的更细小的沙尘颗粒，从而使得最终进入箱体的空气还有的沙尘量大大降低，大大提升了本防沙尘的华式箱变开关柜的防沙尘能力，同时还能兼顾散热通风能力。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明一种防沙尘的华式箱变开关柜一实施例的立体结构示意图；
图2为本发明一种防沙尘的华式箱变开关柜一实施例的俯视结构示意图；
图3为本发明一种防沙尘的华式箱变开关柜一实施例的通风防尘框的水平截面构示意图；
图4为本发明一种防沙尘的华式箱变开关柜一实施例的第一活动门及第一操作口的立体结构示意图。
附图标号说明：
标号 名称 标号 名称
100 箱体 370 拉手
110 第一侧板 380 滤纸板
120 第二侧板 391 网框
130 第三侧板 392 纱网
140 第四侧板 410 限位条
150 底板 420 轴流风机
160 顶板 500 第一活动门
170 第一内板 510 外门
180 第二内板 520 内密封块
210 高压室 530 突出条
220 高压柜 600 第二活动门
230 低压室 111 第一通风口
240 低压柜 121 第二通风口
250 变压室 131 第三通风口
260 变压器 141 第一操作口
300 通风防尘框 143 第二操作口
310 第一框板 171 第一通孔
320 第二框板 172 第二通孔
330 第三框板 430 矩形缺口
340 第四框板 142 凹槽
350 第五框板 360 支撑板
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，在本发明中如涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解， 例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
另外，本发明各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种防沙尘的华式箱变开关柜。
请参考附图1-附图4，防沙尘的华式箱变开关柜的一实施例，本防沙尘的华式箱变开关柜包括箱体100和防尘组件；箱体100包括均竖直设置的第一侧板110、第一侧板120、第三侧板130和第四侧板140，以及水平设置的顶板160和底板150；第一侧板110和第一侧板120彼此平行且正相对；第三侧板130和第四侧板140彼此平行且正相对；顶板160和底板150彼此正相对。即上述6块板材构成了箱体100，板材之间采用焊接连接，保证连接的密封性。
第一侧板110开设有第一通风口111；第一侧板120开设有第二通风口121；第三侧板130开设有第三通风口131；第一通风口111的尺寸、第二通风口121的尺寸及第三通风口131的尺寸一致。这里的第一通风口111和第二通风口121用户进入外界空气，第三通风口131用于排出箱体100内空气，以保证整个箱体100的散热。
防尘组件包括通风防尘框300；通风防尘框300包括外框、阻隔插盒、轴流风机420和纱网框。
外框包括第一框板310、第二框板320、第三框板330、第四框板340和第五框板350；第一框板310和第二框板320均竖直设置且彼此正相对；第三框板330和第四框板340均水平设置且位于同一水平面；第五框板350水平设置且位于第三框板330的下方；第五框板350分别连接于第一框板310的底部和第二框板320的底部；第三框板330和第四框板340均为矩形板且尺寸一致，第三框板330的两侧边缘分别连接于第一框板310的顶部和第二框板320的顶部，第四框板340的两侧边缘分别连接于第一框板310的顶部和第二框板320的顶部；第三框板330和第四框板340之间形成有矩形缺口430。
正常使用时，箱体100的底板150是和地面接触并水平设置的，故上述通风防尘框300的位置也是相对固定的，即外框为两端开口，顶部开设有矩形缺口430的框体。
阻隔插盒包括支撑板360和滤纸板380；滤纸板380的数量为多个；多个滤纸板380交错式连接于支撑板360的一侧面；滤纸板380能插入矩形缺口430中，且当滤纸板380完全插入矩形缺口430中时，支撑板360密封盖住矩形缺口430。
即阻隔插盒从矩形缺口430插入，使得滤纸板380完全插入外框内，以对流经的空气进行一定的阻挡，延长流经的空气的路程，能够降低空气中夹杂的灰尘颗粒进入箱体100的几率。
将滤纸板380固定于支撑板360的下方，并将整个阻隔插盒做出可活动插入外框的结构，是为了便于更换滤纸板380，因滤纸板380为耗材，当滤纸板380被灰尘侵蚀污染到一定程度时，需要对滤纸板380进行更换，此时，只需要将整个阻隔插盒抽出进行更换即可。
外框的内部于第三框板330正下方设置有轴流风机420；纱网框嵌入外框中；纱网框包括网框391和设置于网框391内部的纱网392；当纱网框嵌入外框中时，网框391的周向外壁分别与第一框板310、第二框板320、第四框板340和第五框板350接触，即网框391和外框之间的接触为可拆卸式的密封接触(过盈接触)，以保证外界灰尘不会从缝隙处进入外框内部。
通风防尘框300的数量为3个；3个通风防尘框300分别与第一通风口111、第二通风口121及第三通风口131对应；与第一通风口111对应的通风防尘框300的外框的靠近第三框板330的一端密封连接于第一侧板110的外壁并罩设第一通风口111；与第二通风口121对应的通风防尘框300的外框的靠近第三框板330的一端密封连接于第一侧板120的外壁并罩设第二通风口121；与第三通风口131对应的通风防尘框300的外框的靠近第三框板330的一端密封连接于第三侧板130的外壁并罩设第三通风口131。
需要注意的是，上述3个通风防尘框300有2个将外界空气吸入箱体100，有1个是将箱体100内空气排出箱体100，故与第一通风口111及第二通风口121贯通的通风防尘框300中的轴流风机420的风向设置为从外界吹向箱体100内，而与第三通风口131贯通的通风防尘框300中的轴流风机420的风向设置为从箱体100内吹向外界。
本发明提出的防沙尘的华式箱变开关柜具备优秀的防沙尘能力，具体的，本防沙尘的华式箱变开关柜的箱体100由第一侧板110、第一侧板120、第三侧板130、第四侧板140、顶板160和底板150构成，各板材之间为焊接密封，以保证连接处的密封性；箱体100只开设有第一通风口111、第二通风口121和第三通风口131用以与外界通风散热，第一通风口111、第二通风口121和第四通风口的外部均罩设有通风防尘框300；通风防尘框300包括纱网框、滤纸板380和轴流风机420，在轴流风机420的作用下，外界空气依次经过纱网框、滤纸板380并进入箱体100内，空气在经过纱网框时空气中包含的大部分沙尘颗粒都会被纱网框过滤阻挡，然后在经过交错设置的滤纸板380时，滤纸板380的交错式结构能够进一步阻挡纱网392未能过滤的更细小的沙尘颗粒，从而使得最终进入箱体100的空气还有的沙尘量大大降低，大大提升了本防沙尘的华式箱变开关柜的防沙尘能力，同时还能兼顾散热通风能力。
此外，如附图1和附图3所示，滤纸板380竖直连接于支撑板360的一侧面(即滤纸板380为竖直设置)；滤纸板380的延伸方向垂直于第一框板310；滤纸板380的水平截面呈锯齿型。当滤纸板380完全插入矩形缺口430中时，滤纸板380的底部与第五框板350接触，且相邻的滤纸板380分别与第一框板310及第二框板320接触。
这样是为了增加外界空气进入箱体100内的路程，且整个流通路径呈迂回状，这样能够进一步将空气中含有的沙尘析出并聚集于外框中，使得进入箱体100的空气含有的沙尘量大大降低。
同时，上述滤纸板380为棉纤维滤纸板，棉纤维滤纸板的吸附杂质颗粒的效果出色，且来源广泛，比较实用。
此外，滤纸板380的数量为至少4个(本实施例优选为4个)，如附图3所示，4个滤纸板380彼此交错以形成一个迂回的空气流通路径，提升了过滤灰尘的效果。
同时，与轴流风机420最近的滤纸板380的靠近轴流风机420的一侧还设置有限位条410，限位条410的两端分别连接于第一框板310的内壁和第二框板320的内壁，限位条410是为了防止轴流风机420对滤纸板380产生过大的吸力而使得滤纸板380偏移原来的位置。
同时，为了工作稳定性，也可以设置多个限位条410(图中未示出)，限位条410的数量与滤纸板380的数量一致，限位条410与滤纸板380一一对应，各限位条410分别位于对应的滤纸板380的靠近轴流风机420的一侧，这样设置是为了防止轴流风机420的风力使得滤纸板380产生偏移而堆积在一起，导致外界空气的流通量大大降低。
同样的，与第三通风口131贯通的通风防尘框300中可以不设置滤纸板380，因该通风防尘框300的轴流风机420是将箱体100内的空气吹向外界，故不需要滤纸板380加强过滤效果，只需起到排气的效果即可。
此外，其中1个通风防尘框300与第一侧板110的外壁之间的连接方式为焊接；其中1个通风防尘框300与第一侧板120之间的连接方式为焊接；其中1个通风防尘框300与第三侧板130之间的连接方式为焊接。
实际上，上述焊接连接是为了保证通风防尘框300与箱体100的连接的密封性。
同时，当支撑板360密封盖住矩形缺口430时，支撑板360与外框之间的缝隙处涂抹设置有硅胶密封胶(未示出)，涂抹硅胶密封橡胶同样是为了防止外界灰尘杂质从缝隙处进入外框中，进而进入箱体100内。
此外，如附图1和附图2所示，箱体100还包括第一内板170和第二内板180；第一内板170平行于第三侧板130；第二内板180垂直于第三侧板130；第一内板170分别连接于第一侧板110的内壁和第一侧板120的内壁；第二内板180分别连接于第四侧板140的内壁及第二内板180。
第一内板170、第二内板180、第一侧板110、第四侧板140、顶板160和底板150共同构成高压室210；第一内板170、第二内板180、第一侧板120、第四侧板140、顶板160和底板150共同构成低压室230；第一内板170、第一侧板110、第一侧板120、第三侧板130、顶板160和底板150共同构成变压室250。高压室210内设置有高压柜220，低压室230内设置有低压柜240，变压室250内设置变压器260，这样设置是为了将箱体100的内部空间进行有序的布局，防止箱体100内各电气设备均置于一个空间内而对彼此造成不利干扰，且整体结构更加清晰明了。
第一通风口111贯通高压室210；第二通风口121贯通低压室230；第三通风口131贯通变压室250；第一内板170于高压室210处开设有第一通孔171；第二内板180于低压室230处开设有第二通孔172。
因为箱体100进行了空间上的拆分布局，形成了3个不同的空间，故需要对3个通风口的位置进行调整，通过上述技术方案，使得箱体100的通风和散热效果不受影响。
同时，顶板160的外壁还连接设置有吊耳(未示出)，以便于运输。
此外，通风防尘框300还包括拉手370；拉手370连接于支撑板360的远离滤纸板380的一侧面。通过设置拉手370更便于提拉或插入上述阻隔插盒。上述纱网392为不锈钢纱网，不锈钢纱网的耐久性更出色。
此外，第四侧板140开开设有第一操作口141和第二操作口143，第一操作口141与高压室210贯通，第二操作口143与低压室230贯通，第一操作口141是为了便于维护人员从箱体100外操作高压室210内的高压柜220，第二操作口143是为了便于维护人员从箱体100外操作低压室230内的低压柜240；第四侧板140的外壁还铰接设置有第一活动门500和第二活动门600，第一活动门500用以密封盖住第一操作口141，第二活动门600用以密封盖住第二操作口143。
具体的，第一活动门500和第二活动门600的结构一致，第一操作口141和第二操作口143的结构一致，为了简便，这里以第一活动门500和第一操作口141为例来说明两者的配合结构，第二活动门600和第二操作口143之间的配合结构不再赘述。
第一活动门500包括外门510和内密封块520，内密封块520连接于外门510的靠近第一操作口141的一侧面，第一操作口141为矩形口，内密封块520同样为矩形块，第一操作口141的边沿开设有周向的凹槽142，内密封块520的外边沿设置有周向的突出条530，当第一活动门500关闭时，内密封块520嵌入第一操作口141中，且突出条530嵌入凹槽142中，突出条530优选为橡胶材质，且表面光滑处理。
通过这样设置，使得第一活动门500关闭第一操作口141时，两者之间的连接密封性大大增强，能够有效地防止外界沙尘进入箱体100内。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种防沙尘的华式箱变开关柜，其特征在于，包括箱体和防尘组件；所述箱体包括均竖直设置的第一侧板、第二侧板、第三侧板和第四侧板，以及水平设置的顶板和底板；所述第一侧板和所述第二侧板彼此平行且正相对；所述第三侧板和所述第四侧板彼此平行且正相对；所述顶板和所述底板彼此正相对；
    所述第一侧板开设有第一通风口；所述第二侧板开设有第二通风口；所述第三侧板开设有第三通风口；所述第一通风口的尺寸、所述第二通风口的尺寸及所述第三通风口的尺寸一致；
    所述防尘组件包括通风防尘框；所述通风防尘框包括外框、阻隔插盒、轴流风机和纱网框；
    所述外框包括第一框板、第二框板、第三框板、第四框板和第五框板；所述第一框板和所述第二框板均竖直设置且彼此正相对；所述第三框板和所述第四框板均水平设置且位于同一水平面；所述第五框板水平设置且位于所述第三框板的下方；所述第五框板分别连接于所述第一框板的底部和所述第二框板的底部；所述第三框板和所述第四框板均为矩形板且尺寸一致，所述第三框板的两侧边缘分别连接于所述第一框板的顶部和第二框板的顶部，所述第四框板的两侧边缘分别连接于所述第一框板的顶部和所述第二框板的顶部；所述第三框板和所述第四框板之间形成有矩形缺口；
    所述阻隔插盒包括支撑板和滤纸板；所述滤纸板的数量为多个；多个所述滤纸板交错式连接于所述支撑板的一侧面；所述滤纸板能插入所述矩形缺口中，且当所述滤纸板完全插入所述矩形缺口中时，所述支撑板密封盖住所述矩形缺口；
    所述外框的内部于所述第三框板正下方设置有所述轴流风机；所述纱网框嵌入所述外框中；所述纱网框包括网框和设置于网框内部的纱网；当所述纱网框嵌入所述外框中时，所述网框的周向外壁分别与所述第一框板、所述第二框板、所述第四框板和所述第五框板接触；
    所述通风防尘框的数量为3个；3个所述通风防尘框分别与所述第一通风口、所述第二通风口及所述第三通风口对应；与所述第一通风口对应的所述通风防尘框的所述外框的靠近所述第三框板的一端密封连接于所述第一侧板的外壁并罩设所述第一通风口；与所述第二通风口对应的所述通风防尘框的所述外框的靠近所述第三框板的一端密封连接于所述第二侧板的外壁并罩设所述第二通风口；与所述第三通风口对应的所述通风防尘框的所述外框的靠近所述第三框板的一端密封连接于所述第三侧板的外壁并罩设所述第三通风口。
  2. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，所述滤纸板竖直连接于所述支撑板的一侧面；所述滤纸板的延伸方向垂直于所述第一框板；所述滤纸板的水平截 面呈锯齿型；
    当所述滤纸板完全插入所述矩形缺口中时，所述滤纸板的底部与所述第五框板接触，且相邻的所述滤纸板分别与所述第一框板及所述第二框板接触。
  3. 根据权利要求2所述的防沙尘的华式箱变开关柜，其特征在于，所述滤纸板为棉纤维滤纸板。
  4. 根据权利要求2所述的防沙尘的华式箱变开关柜，其特征在于，所述滤纸板的数量为至少4个。
  5. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，其中1个所述通风防尘框与所述第一侧板的外壁之间的连接方式为焊接；其中1个所述通风防尘框与所述第二侧板之间的连接方式为焊接；其中1个所述通风防尘框与所述第三侧板之间的连接方式为焊接。
  6. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，当所述支撑板密封盖住所述矩形缺口时，所述支撑板与所述外框之间的缝隙处涂抹设置有硅胶密封胶。
  7. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，所述箱体还包括第一内板和第二内板；所述第一内板平行于所述第三侧板；所述第二内板垂直于所述第三侧板；所述第一内板分别连接于所述第一侧板的内壁和所述第二侧板的内壁；所述第二内板分别连接于所述第四侧板的内壁及所述第二内板；
    所述第一内板、所述第二内板、所述第一侧板、所述第四侧板、所述顶板和所述底板共同构成高压室；所述第一内板、所述第二内板、所述第二侧板、所述第四侧板、所述顶板和所述底板共同构成低压室；所述第一内板、所述第一侧板、所述第二侧板、所述第三侧板、所述顶板和所述底板共同构成变压室；
    所述第一通风口贯通所述高压室；所述第二通风口贯通所述低压室；所述第三通风口贯通所述变压室；所述第一内板于所述高压室处开设有第一通孔；所述第二内板于所述低压室处开设有第二通孔。
  8. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，所述通风防尘框还包括拉手；所述拉手连接于所述支撑板的远离所述滤纸板的一侧面。
  9. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，所述纱网为不锈钢纱网。
  10. 根据权利要求1所述的防沙尘的华式箱变开关柜，其特征在于，所述顶板的外壁连接设置有吊耳。
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