CN110793196A - Heating device of current transformer - Google Patents
Heating device of current transformer Download PDFInfo
- Publication number
- CN110793196A CN110793196A CN201911043087.XA CN201911043087A CN110793196A CN 110793196 A CN110793196 A CN 110793196A CN 201911043087 A CN201911043087 A CN 201911043087A CN 110793196 A CN110793196 A CN 110793196A
- Authority
- CN
- China
- Prior art keywords
- air
- bag
- sealing
- positioning
- current transformer
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 33
- 238000004891 communication Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 239000006247 magnetic powder Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000003670 easy-to-clean Effects 0.000 abstract description 2
- 210000003811 finger Anatomy 0.000 abstract description 2
- 210000003813 thumb Anatomy 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 230000009194 climbing Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
The invention discloses a heating device of a current transformer, relates to the field of transformer maintenance devices, and aims to solve the problems that in the prior art, two heating and blowing devices are adopted, so that the cost is high, the weight is heavy, magnetic sheets can easily attract some magnetic powder, the magnetic powder is not easy to clean, and the magnetic powder is not too square to store. In addition, need the manual work to climb on the mutual-inductor and aim at two gasbags during the installation, bring inconvenience for the operation like this, climb and also have the problem of certain potential safety hazard, adopt and include a plurality of gasbag and the air inlet that piles up the inner chamber each other and communicate each other, the gasbag is the ring structure, has seted up the opening along the axial on this ring, and this gasbag can break off with the fingers and thumb along the opening to both sides and form C shape structure. The invention has the advantages of reasonable design, ingenious structure, low cost, convenient operation, small volume, light weight, convenient carrying, and convenient assembly and maintenance.
Description
Technical Field
The invention relates to the field of mutual inductor maintenance devices, in particular to a heating device of a current mutual inductor.
Background
SF6The current transformer is an electrical equipment widely used in the power industry, SF6The gas is colorless, odorless, has high electrical strength and excellent arc extinguishing performance, is an excellent insulating substance, and is more oil-immersed current transformer (SF)6The gas insulation mutual inductor can generate huge pressure during high-energy discharge, but the influence caused by explosion can be effectively controlled through a pressure release device such as an explosion-proof sheet, and therefore the gas insulation mutual inductor is more and more widely used in a power grid.
SF6The moisture in the current transformer usually exists in the form of water vapor, and the moisture is condensed when the moisture content reaches 716 mu L/L under the absolute pressure of 0.4MPa and the temperature of-10 ℃, and the moisture is condensed when the moisture content reaches 1528 mu L/L under the temperature of 0 ℃. At lower temperatures, creeping discharge may occur due to condensation of water vapor that may be present and adhere to the surface of the insulating member. In severe cold regions, when SF6When the micro-water content in the mutual inductor is too high, moisture condensation exists, and the risk of surface discharge is generated inside, so that the safe and stable operation of equipment is seriously influenced. In order to solve the problem of low-temperature condensation, a plurality of mutual inductor heating devices, such as a flat ribbon heating belt with a built-in heating wire, are available on the market.
The inventor also develops and applies a Chinese utility model patent, and CN201821912311.5 is a portable mutual inductor heating device which adopts two symmetrical air bags capable of being combined into a cylinder structure and a heating blower device; the air bag is of a semicircular structure, an air inlet pipe is arranged at the bottom of the outer side of the air bag, and the heating and blowing device blows heated air into the air bag through the air inlet pipe; a plurality of air outlets are formed in the inner wall of the air bag; the cross section of the circular ring of the air bag is fixedly provided with a magnetic sheet. The heating and air blowing devices of the two air bags are continuously electrified and the air bags are blown up, then the mutual inductor is correspondingly wrapped by the openings of the two air bags after being blown up and is attracted together through the magnetic sheets, and at the moment, hot air is blown out from the air outlet to heat the mutual inductor. However, in the long-term practice process, the magnetic sheets are required to be placed on the side faces of the two symmetrical air bags, and the two heating and blowing devices are high in cost and heavy in weight, and the magnetic sheets can attract some magnetic powder easily, so that the magnetic powder is not easy to clean and is not too square to store. In addition, the mutual inductor needs to be manually climbed to align the two air bags during installation, so that inconvenience is brought to operation, and certain potential safety hazards also exist during climbing.
Disclosure of Invention
In order to solve the problems, the invention adopts the following technical scheme:
the utility model provides a current transformer heating device, includes a plurality of gasbags and the air inlet that pile up the inner chamber each other and communicate each other, the gasbag is the ring structure, has seted up the opening along the axial on this ring, and this gasbag can be broken off with the fingers and thumb along the opening to both sides and form C shape structure.
Preferably, the air bag further comprises a sealing and positioning bag, the sealing and positioning bag is the same as the air bag in shape, and the outer diameter of the sealing and positioning bag is equal to the inner diameter of the air bag;
the sealing positioning bag is fixedly arranged on the central hole of the air bag, and the inner cavity of the sealing positioning bag is communicated with the inner cavity of the air bag.
Preferably, the number of the sealed positioning bags is three, and the sealed positioning bags are respectively arranged at the bottom, the middle and the upper part of an air bag column formed by stacking a plurality of air bags.
Preferably, the inner cavity of the sealing and positioning bag is connected with the inner cavity of the air bag through a communication air hole.
Preferably, the diameter of the communicating air hole is smaller than the diameter of the inner cavity of the sealing and positioning capsule.
Preferably, the diameter of the communication air hole is one third of the diameter of the inner cavity of the sealing and positioning capsule.
Preferably, the air bag is made of an EVA film, and the outer surface of the air bag is flocked.
Preferably, the device further comprises a heating air blowing device and a vacuum pump.
The invention has the advantages of reasonable design, ingenious structure, low cost, convenient operation, small volume, light weight, convenient carrying, and convenient assembly and maintenance. Can effectively solve prior art and adopt two heating air-blast devices to lead to the cost higher, weight is heavier, and some magnetic conduction powder of magnetic sheet attraction still are difficult for clearing up, also too square accomodating. In addition, the mutual inductor needs to be manually climbed to align the two air bags during installation, so that inconvenience is brought to operation, and the climbing problem also has certain potential safety hazard.
Drawings
FIG. 1 is a schematic perspective view of the embodiment of the present invention after being inflated;
FIG. 2 is a front view of the embodiment of the present invention after being inflated;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
fig. 5 is a cross-sectional view of fig. 1.
In the drawings, each reference numeral denotes: the air bag comprises an air bag 1, an air inlet 2 and a sealing and positioning bag 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described clearly and completely with reference to fig. 1 to 5 of the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
As shown in fig. 1 to 5, a heating device for a current transformer comprises a plurality of mutually stacked air bags 1 with mutually communicated inner cavities and an air inlet 2, wherein the air inlet 2 is arranged on the side surface of the air bag 1 at the bottommost part. 1 adoption EVA film of gasbag is made, 1 surface flocking of gasbag, and such design makes the gasbag surface have concave-convex structure, can maintain the temperature better, plays certain heat preservation effect.
As shown, the air-bag 1 is of a circular ring structure, the inner diameter of which should be able to accommodate a heated instrument transformer, i.e. its inner diameter is greater than or equal to the outer diameter of the instrument transformer. The ring is provided with an opening 10 along the axial direction, that is, the airbag 1 can be broken along the opening 10 to both sides to form a C-shaped structure. The openings 10 of a plurality of air bags 1 stacked on top of each other are oriented in the same direction, and the openings 10 form a straight line.
In order to prevent the hot air in the mutual inductor from flowing away too fast after the air bag is expanded, a sealing and positioning bag 11 is further arranged in the air bag 1, the shape of the sealing and positioning bag 11 is the same as that of the air bag 1, and only the outer diameter of the sealing and positioning bag 11 is equal to the inner diameter of the air bag 1. The sealing and positioning bag 11 is fixedly arranged on the central hole of the air bag 1, and the inner cavity of the sealing and positioning bag 11 is communicated with the inner cavity of the air bag 1. The inner cavity of the sealing and positioning bag 11 is connected with the inner cavity of the air bag 1 through a communicating air hole. The diameter of the communicating air hole is smaller than that of the inner cavity of the sealing and positioning capsule 11. The diameter of the communicating air hole is one third of the diameter of the inner cavity of the sealing and positioning bag 11. The design can ensure that the sealing and positioning bag 11 will gradually expand after all the air bags 1 are inflated and expanded, and the upward expansion and extension of the air bags 1 will not be hindered.
In order to reduce the cost, the number of the sealing and positioning bags 11 is three, and the three sealing and positioning bags are respectively arranged at the bottom, the middle and the upper part of an air bag column formed by stacking a plurality of air bags 1. The bottom and the sealed location bag 11 on upper portion are used for preventing that hot gas runs off at the excessive speed, and the sealed location bag 11 in middle part is used for the location, prevents to blow because of wind and leads to whole device to warp.
In addition, the device also comprises a heating air blowing device and a vacuum pump. The heating blower may be a common industrial blower. The vacuum pump is used for compressing and recycling the device after heating and heat preservation are finished.
In operation, a plurality of stacked deflated air bags 1 are broken along the opening 10 to form a C-shaped structure and then sleeved on the mutual inductor. And then, communicating an air outlet of the heating and air blowing device with the air inlet 2 by using a pipeline and starting the heating and air blowing device. The hot air inflates the inner cavities of the air bags 1 from the air inlets 2, so that all the air bags 1 are gradually expanded, the air bags 1 gradually extend upwards in the expansion process, and the mutual inductor is wrapped in the central hole. After the air bags are expanded, the diameter of the communicating air hole is one third of that of the inner cavity of the sealing and positioning bag 11, and the sealing and positioning bag 11 is filled with air at last to be configured to block the upper end and the lower end to prevent hot air from flowing out. Because the hot air is filled, the air bag 1 wraps the mutual inductor and simultaneously transfers the heat to the mutual inductor, thereby conveniently realizing the functions of heating and heat preservation.
After the heating and heat preservation operation is completed, the heating and air blowing device is detached, the vacuum pump is replaced, the air in the air bag 1 and the air in the sealing and positioning bag 11 is pumped out, the whole air bag 1 and the sealing and positioning bag 11 are automatically shriveled and shrunk, and the instrument transformer is taken down after the shrinkage is completed.
The invention has the advantages of reasonable design, ingenious structure, low cost, convenient operation, small volume, light weight, convenient carrying, and convenient assembly and maintenance. Can effectively solve prior art and adopt two heating air-blast devices to lead to the cost higher, weight is heavier, and some magnetic conduction powder of magnetic sheet attraction still are difficult for clearing up, also too square accomodating. In addition, the mutual inductor needs to be manually climbed to align the two air bags during installation, so that inconvenience is brought to operation, and the climbing problem also has certain potential safety hazard.
Claims (8)
1. The utility model provides a current transformer heating device, includes a plurality of gasbag (1) and air inlet (2) that pile up the inner chamber intercommunication each other, its characterized in that:
gasbag (1) is the ring structure, has seted up opening (10) along the axial on this ring, and this gasbag (1) can be broken off along opening (10) to both sides and form C shape structure.
2. The current transformer heating apparatus according to claim 1, wherein:
the air bag (1) further comprises a sealing and positioning bag (11), the shape of the sealing and positioning bag (11) is the same as that of the air bag (1), and the outer diameter of the sealing and positioning bag (11) is equal to the inner diameter of the air bag (1);
the sealing and positioning bag (11) is fixedly arranged on the central hole of the air bag (1), and the inner cavity of the sealing and positioning bag (11) is communicated with the inner cavity of the air bag (1).
3. The current transformer heating apparatus according to claim 2, wherein:
the three sealing and positioning bags (11) are respectively arranged at the bottom, the middle and the upper part of an air bag column body formed by stacking a plurality of air bags (1).
4. The current transformer heating apparatus according to claim 2, wherein:
the inner cavity of the sealing and positioning bag (11) is connected with the inner cavity of the air bag (1) through a communicating air hole.
5. The current transformer heating apparatus according to claim 4, wherein:
the diameter of the communication air hole is smaller than that of the inner cavity of the sealing and positioning bag (11).
6. The current transformer heating apparatus according to claim 5, wherein:
the diameter of the communicating air hole is one third of the diameter of the inner cavity of the sealing and positioning bag (11).
7. The heating device of the current transformer according to any one of claims 1 to 6, wherein:
the air bag (1) is made of an EVA film, and the outer surface of the air bag (1) is flocked.
8. The heating device of the current transformer according to any one of claims 1 to 6, wherein:
also comprises a heating and air blowing device and a vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043087.XA CN110793196A (en) | 2019-10-30 | 2019-10-30 | Heating device of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043087.XA CN110793196A (en) | 2019-10-30 | 2019-10-30 | Heating device of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110793196A true CN110793196A (en) | 2020-02-14 |
Family
ID=69441992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911043087.XA Pending CN110793196A (en) | 2019-10-30 | 2019-10-30 | Heating device of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110793196A (en) |
Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001178758A (en) * | 1999-12-24 | 2001-07-03 | Mariko Kaneko | Body correcting instrument by air bag |
| CN2788768Y (en) * | 2005-01-28 | 2006-06-21 | 王咏梅 | Portable air-filling physical therapeutical device for cervical vertebra |
| EP1905053A1 (en) * | 2005-07-17 | 2008-04-02 | Siemens Aktiengesellschaft | Hermetically sealed electrical apparatus |
| CN201213896Y (en) * | 2008-07-04 | 2009-04-01 | 杨春玲 | Cervical vertebra massage traction carriage |
| CN201342055Y (en) * | 2008-12-23 | 2009-11-11 | 张瑞波 | Neck massager |
| CN201723713U (en) * | 2009-11-27 | 2011-01-26 | 陈兆红 | Sealing device for hydraulic cylinder |
| CN201949193U (en) * | 2010-12-30 | 2011-08-31 | 李金兴 | Inflatable cervical vertebra retractor |
| CN203677344U (en) * | 2014-01-20 | 2014-07-02 | 李德勇 | Cervical traction fixator |
| US8814768B1 (en) * | 2013-06-28 | 2014-08-26 | Seong Sam Yang | Stability exercise device |
| CN204696472U (en) * | 2015-06-23 | 2015-10-07 | 李明礼 | The power distribution cabinet that a kind of fail safe is high |
| CN106786111A (en) * | 2016-12-08 | 2017-05-31 | 同济大学 | A kind of general GIS air chamber micro- water treatment heating device of power optimized |
| CN107255394A (en) * | 2017-05-04 | 2017-10-17 | 广东电网有限责任公司电力科学研究院 | A kind of SF6 equipment Moisture high UCL processing unit |
| CN107665761A (en) * | 2016-07-27 | 2018-02-06 | 国网山东省电力公司经济技术研究院 | Transformer attemperator |
| CN207513914U (en) * | 2017-11-22 | 2018-06-19 | 广西防城港核电有限公司 | A kind of pressure bladder |
| CN207686662U (en) * | 2017-11-18 | 2018-08-03 | 滨州市甲力太阳能科技有限公司 | Thermal-insulating sealing module occluder |
| CN108634698A (en) * | 2018-04-18 | 2018-10-12 | 苏州星始户外体育用品有限公司 | A kind of inflatable air cushion and its manufacturing method |
| CN108895685A (en) * | 2018-08-02 | 2018-11-27 | 广西电网有限责任公司电力科学研究院 | Solar energy mutual inductor heating device |
| CN208638737U (en) * | 2018-08-02 | 2019-03-22 | 广西电网有限责任公司电力科学研究院 | Illuminated mutual inductor heating device |
| CN109520127A (en) * | 2018-11-20 | 2019-03-26 | 广西电网有限责任公司电力科学研究院 | Heated air circulation type mutual inductor heating and heat-insulating device |
| CN208657101U (en) * | 2018-07-20 | 2019-03-26 | 广西电网有限责任公司电力科学研究院 | A kind of Portable mutual inductor attemperator |
| CN109631330A (en) * | 2018-11-20 | 2019-04-16 | 广西电网有限责任公司电力科学研究院 | Mutual inductor heating and thermal insulation air bag |
| CN209054834U (en) * | 2018-11-09 | 2019-07-02 | 广州金誉制冷设备有限公司 | A kind of cold storage plate air sac sealing band |
| CN211316530U (en) * | 2019-10-30 | 2020-08-21 | 广西电网有限责任公司电力科学研究院 | Air bag type mutual inductor heating device |
-
2019
- 2019-10-30 CN CN201911043087.XA patent/CN110793196A/en active Pending
Patent Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001178758A (en) * | 1999-12-24 | 2001-07-03 | Mariko Kaneko | Body correcting instrument by air bag |
| CN2788768Y (en) * | 2005-01-28 | 2006-06-21 | 王咏梅 | Portable air-filling physical therapeutical device for cervical vertebra |
| EP1905053A1 (en) * | 2005-07-17 | 2008-04-02 | Siemens Aktiengesellschaft | Hermetically sealed electrical apparatus |
| CN201213896Y (en) * | 2008-07-04 | 2009-04-01 | 杨春玲 | Cervical vertebra massage traction carriage |
| CN201342055Y (en) * | 2008-12-23 | 2009-11-11 | 张瑞波 | Neck massager |
| CN201723713U (en) * | 2009-11-27 | 2011-01-26 | 陈兆红 | Sealing device for hydraulic cylinder |
| CN201949193U (en) * | 2010-12-30 | 2011-08-31 | 李金兴 | Inflatable cervical vertebra retractor |
| US8814768B1 (en) * | 2013-06-28 | 2014-08-26 | Seong Sam Yang | Stability exercise device |
| CN203677344U (en) * | 2014-01-20 | 2014-07-02 | 李德勇 | Cervical traction fixator |
| CN204696472U (en) * | 2015-06-23 | 2015-10-07 | 李明礼 | The power distribution cabinet that a kind of fail safe is high |
| CN107665761A (en) * | 2016-07-27 | 2018-02-06 | 国网山东省电力公司经济技术研究院 | Transformer attemperator |
| CN106786111A (en) * | 2016-12-08 | 2017-05-31 | 同济大学 | A kind of general GIS air chamber micro- water treatment heating device of power optimized |
| CN107255394A (en) * | 2017-05-04 | 2017-10-17 | 广东电网有限责任公司电力科学研究院 | A kind of SF6 equipment Moisture high UCL processing unit |
| CN207686662U (en) * | 2017-11-18 | 2018-08-03 | 滨州市甲力太阳能科技有限公司 | Thermal-insulating sealing module occluder |
| CN207513914U (en) * | 2017-11-22 | 2018-06-19 | 广西防城港核电有限公司 | A kind of pressure bladder |
| CN108634698A (en) * | 2018-04-18 | 2018-10-12 | 苏州星始户外体育用品有限公司 | A kind of inflatable air cushion and its manufacturing method |
| CN208657101U (en) * | 2018-07-20 | 2019-03-26 | 广西电网有限责任公司电力科学研究院 | A kind of Portable mutual inductor attemperator |
| CN108895685A (en) * | 2018-08-02 | 2018-11-27 | 广西电网有限责任公司电力科学研究院 | Solar energy mutual inductor heating device |
| CN208638737U (en) * | 2018-08-02 | 2019-03-22 | 广西电网有限责任公司电力科学研究院 | Illuminated mutual inductor heating device |
| CN209054834U (en) * | 2018-11-09 | 2019-07-02 | 广州金誉制冷设备有限公司 | A kind of cold storage plate air sac sealing band |
| CN109520127A (en) * | 2018-11-20 | 2019-03-26 | 广西电网有限责任公司电力科学研究院 | Heated air circulation type mutual inductor heating and heat-insulating device |
| CN109631330A (en) * | 2018-11-20 | 2019-04-16 | 广西电网有限责任公司电力科学研究院 | Mutual inductor heating and thermal insulation air bag |
| CN211316530U (en) * | 2019-10-30 | 2020-08-21 | 广西电网有限责任公司电力科学研究院 | Air bag type mutual inductor heating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211316530U (en) | Air bag type mutual inductor heating device | |
| CN210575428U (en) | Voltage-resistant transformer bushing | |
| CN106976029A (en) | A kind of fixture based on miniature start air bag | |
| CN113521607A (en) | Automatic fire extinguishing device for distribution box | |
| CN110793196A (en) | Heating device of current transformer | |
| CN205177548U (en) | Oil formula transformer | |
| CN203521374U (en) | Picking device of bulb in high voltage chamber of transformer station | |
| CN208819826U (en) | A kind of explosion-proof high-pressure fuse | |
| CN107742559A (en) | A kind of tortuous synchronous compression arc extinguishing lightning protection device of parallel arrangement arc extinguishing passage | |
| CN109631330B (en) | Mutual inductor heating heat preservation gasbag | |
| CN203932012U (en) | Puffer-type hyperbaric chamber apparatus for replacing bulb | |
| CN207303030U (en) | A kind of fuse and the fuse unit using the fuse | |
| CN202513073U (en) | Insulation tube and main circuit structure employing same | |
| CN106992454A (en) | The indoor ac metal closing switch gear of armored withdraw type | |
| CN209415756U (en) | Hot air type mutual inductor heating and heat-insulating device | |
| CN203702490U (en) | Inflator capable of conducting inflation through upward pull | |
| CN207410004U (en) | A kind of heat-shrink cable accessory | |
| CN207149882U (en) | A kind of tortuous synchronous compression arc extinguishing lightning protection device for being provided with protection side | |
| CN215415504U (en) | Inflation and deflation integrated line hanging rod with built-in inflator pump | |
| CN206023029U (en) | A kind of pressure relief device for switchgear | |
| CN205890416U (en) | Protection device and use of blowing out protection device's tire of blowing out | |
| CN104037056B (en) | Puffer-type hyperbaric chamber apparatus for replacing bulb | |
| CN201112315Y (en) | Combined electric fuse inserting type blanking adapter device | |
| CN206820353U (en) | Gas-filling cabinet | |
| CN207234270U (en) | A kind of all insulation air ring main unit |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200214 |