CN109586202B - Internal combustion arc pressure relief collecting device for prefabricated substation - Google Patents
Internal combustion arc pressure relief collecting device for prefabricated substation Download PDFInfo
- Publication number
- CN109586202B CN109586202B CN201811520256.XA CN201811520256A CN109586202B CN 109586202 B CN109586202 B CN 109586202B CN 201811520256 A CN201811520256 A CN 201811520256A CN 109586202 B CN109586202 B CN 109586202B
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- relief channel
- channel
- plate
- top pressure
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000002341 toxic gas Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001233242 Lontra Species 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- H02B13/035—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
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
Abstract
The invention discloses an internal combustion arc pressure relief collecting device for a prefabricated substation, which at least comprises a prefabricated cabin and at least one inflatable switch cabinet arranged in the prefabricated cabin, and is characterized by comprising a pressure relief screen plate arranged on the top of the inflatable switch cabinet, a top pressure relief channel covered on the pressure relief screen plate, a side lead-out pressure relief channel arranged at the outlet end of the top pressure relief channel, and an outdoor pressure relief channel arranged on the top of a bulkhead on one side of the prefabricated cabin, wherein the inlet end of the outdoor pressure relief channel is butted with the outlet end of the side lead-out pressure relief channel. According to the invention, on the premise of not changing the gas tank and the cabinet top structure of the inflatable switch cabinet, only the cabinet top structure is optimally designed to realize a common pressure relief channel, and then the pressure relief channel is connected with the wall of the prefabricated cabin to exhaust gas out of the prefabricated cabin.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to an internal combustion arc pressure relief collecting device for a pre-installed substation.
Background
A prefabricated transformer station (prefabricated cabin) is a factory prefabricated indoor and outdoor compact distribution equipment with high-voltage switch equipment, distribution transformer and low-voltage distribution equipment and arranged into one body according to a certain wiring scheme, i.e. the functions of transformer voltage reduction and low-voltage distribution are organically combined together, and mounted in a moisture-proof, rust-proof, dust-proof, rat-proof, fire-proof, theft-proof, heat-insulating, fully-closed and movable steel structure box. The method is particularly suitable for urban network construction and transformation, and is a brand-new substation rising from civil engineering substations.
The voltage class of the high-voltage switchgear in the prefabricated cabin evolves from 12kV to 40.5 kV. The current 40.5kV air-insulated handcart cabinet is wide: 1200 mm, high: 2600 mm, deep: 2800 mm, not suitable for being placed in prefabricated cabins.
At present, the gas insulated fixed type gas-filled switch cabinet is more suitable for being placed in a prefabricated cabin. This type of inflatable switch cabinet is wide: 600mm, high: 2400mm, depth: 1600 mm. Because the height of the prefabricated cabin is limited by transportation, the net height in the prefabricated cabin after the 40.5kV gas insulation fixed type inflatable switch cabinet is placed does not exceed 2700 millimeters, namely, the space from the top of the 40.5kV gas insulation fixed type inflatable switch cabinet to the top of the prefabricated cabin is 300 millimeters, and the pressure relief opening of the existing 40.5kV gas insulation fixed type inflatable switch cabinet is arranged on the top of the cabinet.
When the internal arcing faults occur in the gas box and the cable chamber of the 40.5kV gas insulation fixed type inflatable switch cabinet, the energy and the expansion gas of the electric arc are exhausted to the top of the prefabricated cabin through the pressure relief opening in the cabinet top. According to the requirement of internal arcing of standard GB 3906-2006 equipment, the distance between the top of the inflatable switch cabinet and the top of the prefabricated cabin is required to reach 800mm, but the minimum space is only 300mm at present, so that certain destructiveness to the top of the prefabricated cabin is certainly caused, certain damage is brought to the top structure of the prefabricated cabin, and hidden dangers are brought to the personal safety of operators. In addition, the gas generated by arcing may have part of toxic gas, when the prefabricated cabin is opened by an operator, the toxic gas can bring great harm to the operator, the personal safety of the operator is seriously affected, and the defects bring great adverse factors to the emission work of the gas generated by arcing.
Disclosure of Invention
The invention aims to solve the technical problem of providing the arcing pressure relief collecting device which is reasonable in design, simple in structure, capable of preventing the top of the prefabricated cabin from being damaged, capable of avoiding the harm of toxic gas to operators and good in safety performance and is used in the prefabricated substation aiming at the defects of the prior art.
The technical problem to be solved by the invention can be realized by the following technical scheme:
the utility model provides an internal combustion arc pressure release collection device for prepackage type transformer substation, prepackage type transformer substation contains prefabricated cabin at least and installs at least one inflatable switch cabinet in the prefabricated cabin, a serial communication port, internal combustion arc pressure release collection device is including setting up pressure release otter board, the cover at inflatable switch cabinet top are in top pressure release passageway, setting on the pressure release otter board are in pressure release passageway, setting are drawn forth to the side of top pressure release passageway exit end, set up and are in outdoor pressure release passageway on prefabricated cabin one side bulkhead top, outdoor pressure release passageway entry end with the exit end butt joint that pressure release passageway was drawn forth to the side.
In a preferred embodiment of the present invention, the top pressure-releasing channel is enclosed by a top pressure-releasing channel top plate, a top pressure-releasing channel bottom plate, a top pressure-releasing channel left side plate, a top pressure-releasing channel right side plate and a top channel side sealing plate, the left and right side edges of the top pressure-releasing channel top plate are connected with the upper edges of the top pressure-releasing channel left side plate and the top pressure-releasing channel right side plate through fasteners, the left and right side edges of the top pressure-releasing channel bottom plate are connected with the lower edges of the top pressure-releasing channel left side plate and the top pressure-releasing channel right side plate through fasteners, and the periphery of the top channel side sealing plate is connected with the top pressure-releasing channel top plate, the top pressure-releasing channel bottom plate, the top pressure-releasing channel left side plate; the top pressure relief channel bottom plate is provided with a pressure relief channel opening, the pressure relief channel opening is provided with two pressure relief plates capable of being pushed open by gas pressure, and the two pressure relief plates are riveted through rivets.
In a preferred embodiment of the present invention, the side leading-out pressure relief channel includes a side leading-out fixed pressure relief channel and a side leading-out adjustable pressure relief channel, an inlet end of the side leading-out fixed pressure relief channel is fixedly connected with an outlet end of the top pressure relief channel, and an inlet end of the side leading-out adjustable pressure relief channel is adjustably connected with an outlet end of the side leading-out fixed pressure relief channel.
In a preferred embodiment of the invention, a bolt is arranged on each channel wall of the outlet end of the side leading-out fixed pressure relief channel, an adjusting nut is arranged on the bolt, a strip groove is arranged on each channel wall of the inlet end of the side leading-out adjusting pressure relief channel, and the bolt penetrates through the corresponding strip groove; the position between the side lead-out adjusting pressure relief channel and the side lead-out fixing pressure relief channel can be fixed by locking the nut; and the position between the side lead-out adjusting pressure relief channel and the side lead-out fixing pressure relief channel can be adjusted by loosening the nut.
Due to the adoption of the technical scheme, on the premise of not changing the gas tank and the cabinet top structure of the inflatable switch cabinet, the invention only optimizes the cabinet top structure to realize a common pressure relief channel, and then the pressure relief channel is connected with the wall of the prefabricated cabin to exhaust gas out of the prefabricated cabin.
Compared with the prior art, the method has the following advantages:
1. the design of eliminating a cabinet top pressure relief cover plate and additionally installing a pressure relief channel has simple structure and convenient installation;
2. personal safety is protected;
3. protecting the top of the prefabricated cabin;
4. provides conditions for centralized processing and purification of fault gas.
The invention solves the problem that the pressure relief cover plate of the cabinet top cannot be opened due to the fact that the space from the top of the 40.5kV inflatable switch cabinet to the prefabricated cabin top is only 300mm, and also solves the problem that the arc discharge pressure cannot directly impact the top of the prefabricated cabin.
Drawings
Fig. 1 is a schematic diagram of the general arrangement of the switch cabinet installed in the prefabricated cabin.
Fig. 2 is a schematic diagram of the general arrangement of the switch cabinet placed in the prefabricated cabin.
Fig. 3 is a schematic structural diagram of the switch cabinet of the present invention.
Fig. 4 is a schematic structural diagram of the switch cabinet body of the invention.
FIG. 5 is a schematic diagram of a top pressure relief channel according to the present invention.
FIG. 6 is an exploded view of the top pressure relief channel of the present invention.
Fig. 7 is a schematic structural view of a side outlet pressure relief channel according to the present invention.
Fig. 8 is a schematic diagram of a pressure release trend of a conventional gas-filled switch cabinet.
Fig. 9 is a schematic view of the pressure release trend of the gas-filled switch cabinet of the invention.
FIG. 10 is a schematic of the pressure relief trend of the top vent channel and side outlet vent channel of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1 to 4, there is shown an internal combustion arc pressure relief collection device for a pre-packaged substation comprising at least a prefabricated cabin 100 and at least one gas-filled switchgear installed in the prefabricated cabin 100. The number of the inflatable switch cabinets can be specifically arranged according to projects, and the inflatable switch cabinets can be flexibly combined and expanded at will in various cabinet types. The gas-filled switch cabinet of the embodiment is a group of end cabinets arranged by 800mm wide switch cabinets 210 and 600mm wide switch cabinets 220, and the side sealing plates 130 are arranged on the group of end cabinets arranged.
The tops of the 800mm wide switch cabinet 210 and the 600mm wide switch cabinet 220 are both provided with pressure relief net plates 211 and 221. When the internal arcing faults occur in the 800-width switch cabinet 210 and the 600-width switch cabinet 220, the pressure relief mesh plates 211 and 221 can ensure that fault gas can smoothly pass through and prevent blocky splashes from being sprayed out.
The top of the 800mm wide switch cabinet 210 and the 600mm wide switch cabinet 220 is also provided with a top pressure relief channel 310 with the width of 800mm and a top pressure relief channel 320 with the width of 600mm, the top pressure relief channel 310 with the width of 800mm covers the pressure relief net plate 211, and the top pressure relief channel 320 with the width of 600mm covers the pressure relief net plate 221.
Referring to FIGS. 5 and 6, one end 311 of 800mm wide top pressure relief channel 310 is connected in series with the other end 321 of 600mm wide top pressure relief channel 320. The other end of 800mm wide top pressure bleed passage 310 serves as the outlet end 312 of the entire top pressure bleed passage, and the other end 322 of 600mm wide top pressure bleed passage 310 is closed with a top passage side seal plate 330.
In addition, top pressure relief channel 310 with a width of 800mm and top pressure relief channel 320 with a width of 600mm are surrounded by top pressure relief channel top plates 313, 323, top pressure relief channel bottom plates 314, 324, top pressure relief channel left side plates 315, 325, and top pressure relief channel right side plates 316, 326, left and right side edges of top pressure relief channel top plates 313, 323 are connected with top pressure relief channel left side plates 315, 325 and top pressure relief channel right side plates 316, 326 through fasteners, and left and right side edges of top pressure relief channel bottom plates 314, 324 are connected with top pressure relief channel left side plates 315, 325 and top pressure relief channel right side plates 316, 326 through fasteners.
The top channel side sealing plate 330 is connected around to the top pressure relief channel top plate 323, the top pressure relief channel bottom plate 324, the top pressure relief channel left side plate 325, the top pressure relief channel right side plate 326 at the other end 322 by fasteners.
The top pressure relief duct bottom plates 314 and 324 are opened with pressure relief duct ports 314a and 324a, the pressure relief duct ports 314a and 324a are provided with two pressure relief plates 314b, 314c, 324b and 324c which can be pushed open by gas pressure, and the two pressure relief plates 314b, 314c, 324b and 324c are riveted by rivets 340.
Referring to fig. 7, the side outlet pressure relief channel 400 shown in the figure includes a side outlet fixed pressure relief channel 410 and a side outlet adjustable pressure relief channel 420, an inlet end 411 of the side outlet fixed pressure relief channel 410 is fixedly connected with an outlet end 312 of the top pressure relief channel, and an inlet end 421 of the side outlet adjustable pressure relief channel 420 is adjustably connected with an outlet end 412 of the side outlet fixed pressure relief channel 410.
In this embodiment, the adjustable connection between the inlet 421 of the side outlet adjusting pressure relief channel 420 and the outlet 412 of the side outlet fixed pressure relief channel 410 is realized as follows:
An outdoor pressure relief channel 120 is arranged on the top of a bulkhead 110 at one side of the prefabricated cabin 100, and the inlet end of the outdoor pressure relief channel 120 is butted with the outlet end 422 of the side outlet pressure relief channel 420.
Referring to fig. 8, when an internal arcing fault occurs, the cable compartment 510 and the lower plenum compartment 520 in the conventional gas-filled switchgear 500 are vented to the rear of the cabinet through the cabinet rear passage 530 toward the cabinet top 540, and the upper plenum compartment 550 is vented directly toward the cabinet top 540. The disadvantage of this pressure relief method is that: 1) in order to ensure a sufficient pressure relief space, the distance from the cabinet top 540 of the inflatable switch cabinet 500 to the power distribution room or box transformer substation is not less than 800 mm; 2) the direct discharge of the fault gas indoors can threaten the personal safety of operators. This approach can adversely affect equipment and personnel safety.
The invention can better solve the problems. Referring to fig. 9 and 10, when an internal arcing fault occurs, the fault gas in the cable compartments 212, 222 and lower plenum compartments 213, 223 in the 800mm wide and 600mm wide switchgears 210, 220 is released back toward the cabinet and directed through the cabinet back aisles 214, 224 toward the cabinet tops 215, 225; the upper tank compartments 216, 226 are vented directly to the tank tops 215, 225; then the fault gas is collected into the top pressure relief channel 310 with the width of 800mm and the top pressure relief channel 320 with the width of 600mm through the pressure relief mesh plates 211 and 221 of the cabinet tops 215 and 225 of the 800mm wide switch cabinet 210 and the 600mm wide switch cabinet 220, and is uniformly led out to the left side (or the right side according to the actual requirement of the project) through the side pressure relief channel 400 to be discharged to the outside, so that the unified collection and treatment of the fault gas are facilitated.
The invention is particularly applicable to prefabricated cabin solutions: due to transportation restrictions, the clear height H in the prefabricated cabin 100 does not exceed 2700mm, whereas the height of the gas-filled switchgear cabinets 210, 220 is 2400mm, i.e. the distance D between the top 215, 225 of the cabinet and the top of the prefabricated cabin 100 is approximately 300 mm. The design height of the improved pressure relief channel is not more than 250mm, and the installation condition is fully met. The distance L between the side-led pressure relief channel 3 and the prefabricated cabin wall 4 is adjustable, the matching degree is high, and engineering construction is facilitated.
In conclusion, the gas generated by arc burning can be treated in a centralized manner, the requirements of different users can be met, the cable laid in the cable trench can be prevented from being damaged by adopting the structure, the injury to operators caused by toxic gas can be avoided, and meanwhile, the safety performance of the inflatable switch cabinet is effectively improved.
Claims (3)
1. An internal combustion arc pressure relief collecting device for a prefabricated substation, wherein the prefabricated substation at least comprises a prefabricated cabin and at least one inflatable switch cabinet arranged in the prefabricated cabin, and is characterized by comprising a pressure relief screen plate arranged on the cabinet top of the inflatable switch cabinet, a top pressure relief channel covered on the pressure relief screen plate, a side-leading pressure relief channel arranged at the outlet end of the top pressure relief channel, and an outdoor pressure relief channel arranged on the top of the bulkhead on one side of the prefabricated cabin, wherein the inlet end of the outdoor pressure relief channel is butted with the outlet end of the side-leading pressure relief channel; the side leading-out pressure relief channel comprises a side leading-out fixed pressure relief channel and a side leading-out adjusting pressure relief channel, the inlet end of the side leading-out fixed pressure relief channel is fixedly connected with the outlet end of the top pressure relief channel, and the inlet end of the side leading-out adjusting pressure relief channel is adjustably connected with the outlet end of the side leading-out fixed pressure relief channel.
2. An internal combustion arc pressure relief collection device for a pre-installed substation as defined in claim 1, it is characterized in that the top pressure relief channel is enclosed by a top pressure relief channel top plate, a top pressure relief channel bottom plate, a top pressure relief channel left side plate, a top pressure relief channel right side plate and a top channel side sealing plate, the left and right side edges of the top plate of the top pressure relief channel are connected with the upper edges of the left side plate of the top pressure relief channel and the right side plate of the top pressure relief channel through fasteners, the left and right side edges of the bottom plate of the top pressure relief channel are connected with the lower edges of the left side plate of the top pressure relief channel and the right side plate of the top pressure relief channel through fasteners, the periphery of the top channel side sealing plate is connected with the top pressure relief channel top plate, the top pressure relief channel bottom plate, the top pressure relief channel left side plate and the top pressure relief channel right side plate through fasteners; the top pressure relief channel bottom plate is provided with a pressure relief channel opening, the pressure relief channel opening is provided with two pressure relief plates capable of being pushed open by gas pressure, and the two pressure relief plates are riveted through rivets.
3. The internal combustion arc pressure relief collecting device for the preassembled transformer substation of claim 1, wherein a bolt is arranged on each channel wall of the outlet end of the side-leading fixed pressure relief channel, an adjusting nut is arranged on the bolt, a strip groove is arranged on each channel wall of the inlet end of the side-leading adjusting pressure relief channel, and the bolt penetrates through the corresponding strip groove; the position between the side lead-out adjusting pressure relief channel and the side lead-out fixing pressure relief channel can be fixed by locking the nut; and the position between the side lead-out adjusting pressure relief channel and the side lead-out fixing pressure relief channel can be adjusted by loosening the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811520256.XA CN109586202B (en) | 2018-12-12 | 2018-12-12 | Internal combustion arc pressure relief collecting device for prefabricated substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811520256.XA CN109586202B (en) | 2018-12-12 | 2018-12-12 | Internal combustion arc pressure relief collecting device for prefabricated substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109586202A CN109586202A (en) | 2019-04-05 |
| CN109586202B true CN109586202B (en) | 2020-10-23 |
Family
ID=65929491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811520256.XA Active CN109586202B (en) | 2018-12-12 | 2018-12-12 | Internal combustion arc pressure relief collecting device for prefabricated substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109586202B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601122A (en) * | 2019-09-30 | 2019-12-20 | 上海置信电气非晶有限公司 | Cable trench for prefabricated substation |
| CN110943393B (en) * | 2019-11-29 | 2021-08-27 | 河南平高通用电气有限公司 | Gas insulation looped netowrk cabinet |
| CN112398038B (en) * | 2020-10-27 | 2023-03-21 | 许继电气股份有限公司 | Prefabricated cabin pressure release system |
| CN112803292A (en) * | 2020-12-30 | 2021-05-14 | 青岛益和电气集团股份有限公司 | Pressure relief channel for switch cabinet and switch cabinet system |
| CN115347487A (en) * | 2021-05-12 | 2022-11-15 | 西门子能源国际公司 | Combined type underframe flue, medium-pressure equipment and high-pressure equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527825Y (en) * | 2002-03-29 | 2002-12-25 | 谢宏杰 | Pipeline expansion joint |
| CN104806834A (en) * | 2015-02-28 | 2015-07-29 | 美钻能源科技(上海)有限公司 | Telescopic underwater maintenance pipeline |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2157434Y (en) * | 1993-02-20 | 1994-02-23 | 张忠学 | Window type cooking fume exhauster |
| CN201438612U (en) * | 2009-06-01 | 2010-04-14 | 上海电器成套厂有限公司 | Pressure relieving cooling window for DC circuit breaker switch cabinet |
| CN203367828U (en) * | 2013-07-17 | 2013-12-25 | 江苏大全箱变科技有限公司 | Box-type electric substation with concentrated pressure releasing channel |
| CN205051186U (en) * | 2015-10-09 | 2016-02-24 | 株洲时代装备技术有限责任公司 | Direct current switch cabinet pressure relief device |
| CN206789968U (en) * | 2017-04-05 | 2017-12-22 | 福建省电力勘测设计院 | Prefabricated cabin formula unit equipment switch cubicle centralization pressure relief channels |
| CN207279102U (en) * | 2017-06-10 | 2018-04-27 | 江苏新澎复合材料有限公司 | A kind of telescopic joint |
| CN107732745B (en) * | 2017-11-01 | 2024-05-24 | 万控智造股份有限公司 | Armored switch cabinet meeting arcing and temperature rise requirements |
-
2018
- 2018-12-12 CN CN201811520256.XA patent/CN109586202B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527825Y (en) * | 2002-03-29 | 2002-12-25 | 谢宏杰 | Pipeline expansion joint |
| CN104806834A (en) * | 2015-02-28 | 2015-07-29 | 美钻能源科技(上海)有限公司 | Telescopic underwater maintenance pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109586202A (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109586202B (en) | Internal combustion arc pressure relief collecting device for prefabricated substation | |
| CN203504044U (en) | Armoured central-positioned switch cabinet | |
| CN107959248B (en) | A kind of open air dust-proof radiating high-voltage appliance switch cabinet | |
| CN101207267B (en) | Miniaturization premounting type transformer substation with safeguard construction | |
| CN214100578U (en) | Prefabricated cabin pressure release system | |
| CN209881210U (en) | Prepackage type electricity distribution room | |
| CN201142296Y (en) | Indoor amour fixing type metal closed switch apparatus | |
| CN216214984U (en) | High-voltage switch cabinet | |
| CN209104663U (en) | A kind of armored switchgear | |
| CN112736661A (en) | High-voltage switch cabinet | |
| CN111884115A (en) | Cooling equipment for box-type substation | |
| KR200279711Y1 (en) | Distributing board for having the construction of work and repair road | |
| CN211958508U (en) | Armored movable indoor alternating-current high-voltage switch cabinet | |
| CN219811843U (en) | Photovoltaic in-situ boosting transformer substation with protection function | |
| CN112398038B (en) | Prefabricated cabin pressure release system | |
| CN209748038U (en) | Cubical switchboard that security performance is high | |
| CN214673803U (en) | Energy-saving low-voltage switch cabinet convenient to install | |
| CN101635440A (en) | Buried transformer substation with escape passage | |
| CN213782884U (en) | Safe low pressure dynamic compensation cabinet | |
| CN219247306U (en) | Explosion-proof reverse osmosis-proof box-type transformer substation | |
| CN219420199U (en) | High-voltage cable branch box | |
| CN220421230U (en) | Switch cabinet with multiple circulation convection | |
| CN212849591U (en) | Armored movable alternating current metal enclosed switchgear | |
| CN117277128A (en) | Modularized pressure relief collecting system of inflatable cabinet | |
| CN212304230U (en) | High tension switchgear with safety monitoring function |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |