CN114725802B - Urban outdoor power distribution device - Google Patents
Urban outdoor power distribution device Download PDFInfo
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- CN114725802B CN114725802B CN202210568152.6A CN202210568152A CN114725802B CN 114725802 B CN114725802 B CN 114725802B CN 202210568152 A CN202210568152 A CN 202210568152A CN 114725802 B CN114725802 B CN 114725802B
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- liquid
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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
- H02B1/50—Pedestal- or pad-mounted casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/18—Liquid cooling by evaporating liquids
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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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
- H02B1/48—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses an urban outdoor power distribution device, which comprises an overground part and an underground part, wherein the underground part comprises a preassembled type base cabin box body, a liquid-immersed type underground transformer and a pipeline assembly; the prefabricated base cabin box body is provided with a hollow condensation reflux cavity, the condensation reflux cavity comprises a condensation part and a convection part, and the condensation part is communicated with the convection part; the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, the third pipeline communicates the top of the liquid-immersed underground transformer with the condensing part to form a circulation channel of gas insulation condensing medium, and the first pipeline and the second pipeline communicate the radiator of the liquid-immersed underground transformer with the convection part to form a convection channel of liquid insulation cooling medium; the invention increases the heat dissipation area of the liquid-immersed underground transformer, meets the fireproof and waterproof requirements, solves the problem of heat dissipation and ensures the safe and reliable operation of the liquid-immersed underground transformer.
Description
Technical Field
The invention relates to the technical field of power transmission and distribution equipment, in particular to the field of outdoor power distribution equipment for supplying power to outdoor power utilization facilities in the fields of new energy, artificial intelligence and the Internet, such as electric vehicle charging stations, 5G base stations, intelligent poles, edge calculation, intelligent buried garbage stations, sweeping robots and the like, and particularly relates to an urban outdoor power distribution device.
Background
Along with wisdom city construction and development, electric automobile charges, 5G, wisdom pole, edge calculation, intelligent buried trash station, video monitoring, environmental monitoring, self-service charging, outdoor power consumption facilities such as public WIFI quantity increase day by day, will drive outdoor distribution device construction scale increase. A large number of outdoor power distribution devices are located in urban main streets, commercial centers, and the like, and it is very important to reduce the occupied area and to improve the safety and the aesthetic property.
The above object can be achieved by burying the transformer underground, but the requirements for fire-proof, water-proof and heat-dissipating capabilities of the transformer are very high. The prior transformer technology can not meet the triple technical requirements of fire prevention, water prevention and heat dissipation at the same time no matter an oil-immersed transformer or a dry-type transformer. The transformer oil in the oil-immersed transformer is combustible, and fire hazard exists. The dry-type transformer is not damp-proof, is not waterproof and has limited heat dissipation capacity; both are not well suited for use in subterranean environments.
Disclosure of Invention
The invention aims to solve the technical problem that the defects of the prior art are overcome, and the urban outdoor power distribution device is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: an urban outdoor power distribution unit comprises an overground part arranged on the ground and an underground part arranged under the ground, wherein the underground part comprises a pre-installed base cabin box body, a liquid-immersed underground transformer and a pipeline assembly, the liquid-immersed underground transformer and the pipeline assembly are arranged in the pre-installed base cabin box body, the liquid-immersed underground transformer is fully sealed, and an inner body of the liquid-immersed underground transformer is immersed in an insulating cooling medium with a non-combustible characteristic and a phase-change characteristic;
the prefabricated base cabin box body is provided with a hollow condensation reflux cavity, the condensation reflux cavity comprises an upper condensation part and a lower convection part, and the condensation part is communicated with the convection part; at least one condensing part for condensing the gas insulation cooling medium is arranged in the condensing part;
the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline, and the third pipeline is used for communicating the top of the liquid-immersed underground transformer with the condensing part to form a circulation channel of a gas insulation condensing medium; the first pipeline and the second pipeline are used for communicating the radiator of the liquid immersed underground transformer with the convection part to form a convection channel of liquid insulating cooling medium.
Further, it is preferable that the reflux condensation chamber is provided on at least one side of an inner wall of the pre-installed base tank body.
Further, preferably, the condensation and backflow chamber is a cavity structure arranged inside the preassembled type base cabin box body, and the exterior of the condensation and backflow chamber is sealed.
Further, preferably, the condensing member is a metal condensing sheet, and a through hole is formed in the metal condensing member.
Further, preferably, the condensing part sets up a plurality ofly, and is a plurality of condensing part is regular distribution, or, a plurality of condensing part is irregular distribution.
Further, preferably, valves are arranged on the first pipeline, the second pipeline and the third pipeline.
Further, preferably, the inner wall and the outer wall of the pre-installed type base cabin box body are both corrugated structures.
Preferably, a top cover of the preassembled type base cabin box body is provided with a first access hole and a second access hole, and the second access hole is located in the first access hole.
Preferably, the overground part comprises a landscape box body, a high-low voltage switch cabinet and a display screen, the high-low voltage switch cabinet is arranged in the landscape box body, and the display screen is arranged on the outer side wall of the landscape box body.
Further, preferably, the display screen is an LED display screen or a light box advertisement screen.
Further, preferably, the voltage class of the urban outdoor power distribution device is 10kV or 20 kV.
The invention has the beneficial effects that: the invention provides an urban outdoor power distribution device, which fuses a preassembled base cabin box body and a radiator of a liquid immersed underground transformer, wherein the preassembled base cabin box body is provided with a hollow condensation reflux cavity, the condensation reflux cavity is communicated with the radiator of the liquid immersed underground transformer through a pipeline assembly, the condensation reflux cavity comprises an upper condensation part and a lower convection part, the top of the liquid immersed underground transformer is communicated with the condensation part through a third pipeline, a gas insulation cooling medium enters the condensation part through the third pipeline, and the radiator of the liquid immersed underground transformer is communicated with the convection part through the first pipeline and the second pipeline so as to form a convection channel of the liquid insulation cooling medium. By the aid of the measures, the heat dissipation area of the liquid-immersed underground transformer is effectively increased, heat dissipation capacity is improved, fireproof and waterproof requirements are met, the problem of heat dissipation is solved, and safe and reliable operation of the underground environment of the liquid-immersed underground transformer is guaranteed.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a front view of an urban outdoor power distribution unit of the present invention;
FIG. 2 is a top view of a preassembled base module housing of the present invention;
fig. 3 is a schematic view of the structure of the condensing member in the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
An element is said to be "secured to" or "disposed on" another element, either directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
The terms "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or position based on the orientation or position shown in the drawings.
The terms "axial" and "radial" refer to the length of the entire device or component as "axial" and the direction perpendicular to the axial direction as "radial".
The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
The above terms are for convenience of description only and are not to be construed as limiting the present technical solution.
An urban outdoor power distribution device comprises an overground part 1 arranged on the ground and an underground part 2 arranged under the ground, wherein the underground part 2 comprises a preassembled type base cabin box body 21, a liquid-immersed type underground transformer 22 arranged in the preassembled type base cabin box body 21 and a pipeline assembly 23, the inner body of the liquid-immersed type underground transformer 22 is immersed in an insulating cooling medium with non-combustible property and phase change property, and the inner part of the liquid-immersed type underground transformer 22 is communicated with a radiator 221; the pre-installed type base cabin box body 21 is provided with a hollow condensation reflux chamber 24, the condensation reflux chamber 24 is totally sealed, the condensation reflux chamber 24 comprises an upper condensation part 241 and a lower convection part 242, and the condensation part 241 is communicated with the convection part 242; the pipe assembly 23 comprises a first pipe 231, a second pipe 232 and a third pipe 233, the third pipe 233 connects the top of the immersion transformer 22 with the condensing part 241 to form a circulation channel of the gas-insulated cooling medium, and the gas-insulated cooling medium enters the condensing part 241 through the third pipe 233; the first and second pipes 231 and 232 communicate the heat sink 221 of the submersible transformer 22 with the convection part 242 to form a convection channel for the liquid insulating cooling medium.
The invention is divided into an overground part 1 and an underground part 2, a liquid-immersed underground transformer 22 is arranged under the ground, the floor area of the whole device is reduced, the overground part 1 comprises a landscape box body 11, a high-low voltage switch cabinet (not shown in the figure) and a display screen 12, the display screen 12 can be an LED display screen or a lamp box advertisement screen, the high-low voltage switch cabinet is arranged in the landscape box body 11, and the display screen 12 is arranged on at least one side wall outside the landscape box body 11, so that the integral image of the device is improved; the underground part 2 comprises a preassembled type base cabin box body 21, a liquid-immersed type underground transformer 22 and a pipeline assembly 23, wherein the liquid-immersed type underground transformer 22 and the pipeline assembly 23 are arranged in the preassembled type base cabin box body 21, and an inner body of the liquid-immersed type underground transformer 22 is immersed in an insulating cooling medium with a non-combustible characteristic, namely, the insulating cooling medium is non-combustible, so that fire hazard is fundamentally eliminated, and the fire safety of the whole device applied in a city is ensured.
The implementation process of the power distribution device comprises the following steps: when the power distribution device operates, the body inside the liquid-immersed underground transformer 22 generates heat, and most of the liquid insulating cooling medium in the body of the liquid-immersed underground transformer 22 carries away the heat through a convection channel formed by the radiator 221, the first pipeline 231, the second pipeline 232 and the convection part 242, so that the temperature inside the liquid-immersed transformer 22 is reduced; meanwhile, a part of the insulating cooling medium absorbs heat to generate phase change, the liquid insulating cooling medium is converted into a gas insulating cooling medium, the heat generated in the liquid immersed underground transformer 22 is rapidly taken away through phase change heat transfer, so that the temperature field inside the liquid immersed underground transformer 22 is uniformly distributed, a hot spot is eliminated, the gas insulating cooling medium enters the condensation part 241 of the condensation backflow cavity 24 through the third pipeline 233 communicated with the top of the liquid immersed underground transformer 22 and is condensed by the condensation part 243, the gas insulating cooling medium is condensed into the liquid insulating cooling medium, the liquid insulating cooling medium automatically drops to the convection part 242 under the influence of gravity to participate in the convection heat dissipation of a convection channel formed by the radiator 221, the first pipeline 231, the second pipeline 232 and the convection part 242, and the liquid insulating cooling medium flows back to the radiator 221 of the liquid immersed underground transformer 22 through the convection channel, finally, the heat is returned to the interior of the liquid-immersed underground transformer 22, so that the effect of dissipating heat in the liquid-immersed underground transformer 22 is achieved, and the underground safe and reliable operation of the liquid-immersed transformer 22 is ensured.
The invention effectively utilizes the preassembled type base cabin box body 21, at least one side of the preassembled type base cabin box body 21 is provided with a hollow condensation and backflow cavity 24, the condensation and backflow cavity 24 is fully sealed, and the hollow condensation and backflow cavity 24 comprises an upper condensation part 241 and a lower convection part 242; the condensing part 241 is communicated with the convection part 242, and the radiator 221 of the liquid immersed underground transformer 22 is communicated with the convection part 242 of the condensing reflux chamber 24 by arranging the first pipeline 231 and the second pipeline 232, so that a convection channel of the liquid insulating cooling medium in the liquid immersed underground transformer 22 and the liquid insulating cooling medium in the convection part is established, and the insulating cooling medium can dissipate heat through convection; the top of the liquid-immersed underground transformer 22 is communicated with the condensing part 241 by arranging a third pipeline 233 so as to form a circulation channel of a gas insulation cooling medium, the gas insulation cooling medium enters the condensing part through the third channel 233 and is condensed in the condensing part 241 to form a liquid insulation cooling medium, the joint of the third pipeline 233 and the liquid-immersed underground transformer 22 is higher than the liquid level of the insulation cooling medium, namely, the third pipeline 233 can be connected to the tank cover of the liquid-immersed underground transformer 22 and also can be connected to the top of the side wall of the liquid-immersed underground transformer 22; the radiator 221 of the liquid-immersed underground transformer 22 is communicated with the convection part 242 through the arrangement of the first pipeline 231 and the second pipeline 232 so as to form a convection channel of an insulating cooling medium; when the power distribution device operates, most of liquid insulation cooling medium of the body of the liquid immersed underground transformer 22 carries away heat through a convection channel formed by the radiator 221, the first pipeline 231, the second pipeline 232 and the convection part 242; meanwhile, a part of insulating cooling medium absorbs heat and then generates phase change, liquid is changed into gas, and heat generated in the liquid immersed underground transformer 22 can be quickly taken away through phase change heat transfer, so that the temperature field in the liquid immersed underground transformer 22 is uniformly distributed, a hot spot is eliminated, the gas insulating cooling medium enters a condensation part 241 of the condensation backflow cavity 24 through a third pipeline 233 communicated with the top of the liquid immersed transformer 22 and is condensed, the gas insulating cooling medium is condensed into the liquid insulating cooling medium, and the liquid insulating cooling medium is automatically dripped to a convection part 242 under the influence of gravity to participate in convection heat dissipation; this design has increased the heat radiating area of liquid-immersed underground transformer 22, has improved the heat-sinking capability, and phase transition heat transfer makes the inside temperature field evenly distributed of liquid-immersed underground transformer 22 simultaneously, has eliminated the hot spot, has guaranteed liquid-immersed underground transformer 22 underground environment safe and reliable operation.
In order to increase the condensation rate of the gas-insulated cooling medium, as shown in fig. 2 and 3, at least one condensing member 243 for condensing the gas-insulated cooling medium is provided in the condensing portion 241; the condensing member 243 may be a metal condensing sheet, and further, preferably, the metal condensing sheet is V-shaped or W-shaped, a through hole 2431 is provided on the metal condensing member 243, the through hole 2431 may be regularly distributed or irregularly distributed, the through hole 2431 is configured to provide a flow channel for the gas-insulated cooling medium, and formation of gas accumulation on the metal condensing sheet is avoided. In order to further increase the condensation rate of the gas-insulated cooling medium, a plurality of condensing members 243 may be provided, and the plurality of condensing members 243 may be regularly distributed or irregularly distributed.
The condensation and backflow chambers 24 are arranged on at least one side of the inner wall of the pre-installed base tank body 21, that is, one condensation and backflow chamber 24 can be arranged, and the corresponding pipe assemblies 23 are arranged in a group, that is, each group comprises a first pipe 231, a second pipe 232 and a third pipe 233; alternatively, two condensation/return chambers 24 may be provided, and are disposed on two sides of the inner wall of the pre-installed base tank body 21, and two sets of corresponding pipe assemblies 23 are provided, that is, two first pipes 231, two second pipes 232, and two third pipes 233 are included; or a circle of hollow chambers are arranged on the inner wall of the preassembled type base tank body 21, the outside of the hollow chambers is sealed to form a condensation reflux chamber 24, and at the moment, the pipeline assemblies 23 can be arranged in one group or a plurality of groups.
Further, the condensation and reflux chamber 24 may be a closed pipeline structure, that is, a pipeline is installed on the inner wall of the pre-installed type base cabin box 21, and two ends of the pipeline are sealed; alternatively, the condense/reflow chamber 24 may be a chamber structure disposed inside the preassembled bin housing 21, and the condense/reflow chamber 24 is sealed outside, i.e. the condense/reflow chamber 24 is a part of the preassembled bin housing 21.
All be equipped with valve 25 on first pipeline 231, second pipeline 232, the third pipeline 233, valve 25 can be ball valve or butterfly valve, when immersion underground transformer 22 needs to overhaul, separates immersion underground transformer 22 and prepackage type base cabin box 21 through valve 25.
The inner wall and the outer wall of the pre-installed type base cabin box body 21 are corrugated structures, the corrugated structures not only increase the heat dissipation area, but also improve the mechanical strength of the pre-installed type base cabin box body 21.
A top cover of the pre-installed base tank body 21 is provided with a first access hole 211 and a second access hole 212, the second access hole 212 is located in the first access hole 211, and the second access hole 212 is used as an access passage for workers, so that the pre-installed base tank can be conveniently entered to patrol the liquid-immersed underground transformer 22; first access hole 211 is as liquid immersion underground transformer 22 hoist and mount passageway, can hoist through first access hole 211 when liquid immersion underground transformer 22 installs or overhauls.
The urban outdoor power distribution device is suitable for urban power distribution networks with the voltage grades of 10kV and 20 kV.
Claims (10)
1. An urban outdoor power distribution device is characterized by comprising an overground part (1) arranged on the ground and an underground part (2) arranged under the ground, wherein the underground part (2) comprises a preassembled type base tank body (21), a liquid-immersed type underground transformer (22) arranged in the preassembled type base tank body (21) and a pipeline assembly (23), the liquid-immersed type underground transformer (22) is fully sealed, and an inner body of the liquid-immersed type underground transformer (22) is immersed in an insulating cooling medium with non-combustible characteristics and phase change characteristics;
the prefabricated base cabin box body (21) is provided with a hollow condensation and backflow chamber (24), the condensation and backflow chamber (24) is of a cavity structure arranged inside the prefabricated base cabin box body (21), the outside of the condensation and backflow chamber (24) is sealed, the condensation and backflow chamber (24) comprises an upper condensation part (241) and a lower convection part (242), and the condensation part (241) is communicated with the convection part (242); at least one condensing part (243) for condensing the gas insulation cooling medium is arranged in the condensing part (241);
the pipeline assembly (23) comprises a first pipeline (231), a second pipeline (232) and a third pipeline (233), and the third pipeline (233) is used for communicating the top of the liquid-immersed underground transformer (22) with the condensing part (241) to form a circulation channel of a gas insulation condensing medium; the first and second pipes (231, 232) communicate a heat sink (221) of the liquid-immersed underground transformer (22) with the convection part (242) to form a convection channel for a liquid insulating cooling medium.
2. An outdoor urban power distribution unit according to claim 1, wherein the condensation reflow chamber (24) is provided on at least one side of the inner wall of the pre-installed base compartment box (21).
3. Urban outdoor power distribution unit according to claim 1, wherein the condensation member (243) is a metal condensation sheet, and wherein the condensation member (243) is provided with through holes (2431).
4. An urban outdoor distribution unit according to claim 1, wherein said condensation member (243) is provided in plurality, and said plurality of condensation members (243) are regularly distributed or irregularly distributed.
5. An outdoor urban power distribution unit according to claim 1, wherein valves (25) are provided in each of the first pipe (231), the second pipe (232) and the third pipe (233).
6. An outdoor distribution equipment for urban power according to claim 1, wherein the inner and outer walls of the pre-assembled base compartment box (21) are corrugated.
7. An outdoor distribution equipment for urban power according to claim 1, wherein the top cover of the pre-assembled base compartment box (21) is provided with a first access opening (211), a second access opening (212), and the second access opening (212) is located in the first access opening (211).
8. An outdoor distribution equipment in city according to claim 1, characterized by that, the above-ground part (1) includes a landscape box (11), a high-low voltage switch cabinet, a display screen (12), the high-low voltage switch cabinet is set in the landscape box (11), the display screen (12) is set on the outer side wall of the landscape box (11).
9. Urban outdoor power distribution unit according to claim 8, characterized in that the display screen (12) is an LED display screen or a light box advertising screen.
10. An outdoor urban distribution unit according to any of claims 1 to 9, characterized in that it has a voltage class of 10kV, 20 kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210568152.6A CN114725802B (en) | 2022-05-24 | 2022-05-24 | Urban outdoor power distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210568152.6A CN114725802B (en) | 2022-05-24 | 2022-05-24 | Urban outdoor power distribution device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114725802A CN114725802A (en) | 2022-07-08 |
| CN114725802B true CN114725802B (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210568152.6A Active CN114725802B (en) | 2022-05-24 | 2022-05-24 | Urban outdoor power distribution device |
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| CN (1) | CN114725802B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4313022C1 (en) * | 1993-04-21 | 1994-05-05 | Loh Kg Rittal Werk | Cooling unit for electronic or electrical appts. - performs removal of condensed water droplets before cooled air is discharged into cooled appts. housing |
| CN209076081U (en) * | 2018-10-24 | 2019-07-09 | 沃斯坦热力设备（天津）有限公司 | A kind of cold condensate device with waste heat recycling |
| CN211795861U (en) * | 2019-12-19 | 2020-10-30 | 宁波方太厨具有限公司 | Condensation box and steam box with same |
| CN112398025B (en) * | 2020-10-26 | 2023-05-23 | 浙江江山博奥电气有限公司 | Buried transformer substation with low-fault physical heat dissipation |
| CN113257529B (en) * | 2021-07-06 | 2021-12-07 | 深圳市奥电高压电气有限公司 | Liquid-immersed non-combustible power transformer |
| CN114050495A (en) * | 2021-11-16 | 2022-02-15 | 许继变压器有限公司 | Totally-buried box-type substation without ventilation opening |
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2022
- 2022-05-24 CN CN202210568152.6A patent/CN114725802B/en active Active
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