CN104867670B - Oil immersed type current transformer with explosion-proof device - Google Patents
Oil immersed type current transformer with explosion-proof device Download PDFInfo
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- CN104867670B CN104867670B CN201510237171.0A CN201510237171A CN104867670B CN 104867670 B CN104867670 B CN 104867670B CN 201510237171 A CN201510237171 A CN 201510237171A CN 104867670 B CN104867670 B CN 104867670B
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- explosion
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- transformer
- upper oil
- oil conservater
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Abstract
The invention discloses an oil immersed type current transformer with an explosion-proof device. The current transformer comprises a metal expander, an upper oil storage cabinet, a base and a porcelain sleeve, wherein the upper oil storage cabinet, the base and the porcelain sleeve are arranged together by pouring, a transformer shell is formed by the upper oil storage cabinet, the base and the porcelain sleeve, the transformer shell is internally provided with a transformer core, the metal expander is installed at the top of the upper oil storage cabinet, and the upper oil storage cabinet and the base are each connected with an explosion venting device; when a slow puncturing breakdown occurs on the transformer, metal expander is extended by the internal pressure, and the internal pressure is relieved and a breakdown is displayed. When an extreme puncturing breakdown occurs, a shock wave can make the nearby explosion-proof device to conduct motions, therefore the pressure is rapidly released, and the occurrence of explosion accidents is effectively avoided.
Description
Technical field
The present invention relates to power system high-voltage mutual inductor field, more particularly to a kind of oil-immersed current with explosion-protection equipment is mutual
Sensor.
Background technology
Oil-immersed current transformer punctures usually because certain reason occurs internal breakdown in running for a long time
Producing a large amount of gases causes internal pressure to raise, so as to cause transformer explosion.Traditional explosion-proof mode is on transformer top
One metal expander, metal expander inner chamber and transformer intracavity inter-connection are installed, are broken down inside transformer, produce
Gas internal pressure is raised, extend will metal expander, so as to discharge internal pressure, and point out failure.
But the insulation breakdown in current transformer running it occur frequently that it is very fast, when puncture occur in transformer
When middle part and bottom, the shock wave for puncturing expansion does not also have enough time to be delivered to the metal expander at top, and shell porcelain bushing just explodes
.
Transformer explosion generally has two generation mechanisms, and one kind is that the reasons such as over-heat inside produce gas, makes internal pressure
Increase, will cause rupture of case when pressure increases to certain limit.Another kind is that built-in electrical insulation punctures, and is instantaneously produced powerful
Shock wave, the shock wave are propagated to surrounding centered on breakdown point, and are broken through shell from the shell weak spot for touching first and drawn
Play blast.
This blast has tens of in power system every year, gently then causes power failure, heavy then explosion hazard peripheral equipment,
Even jeopardize personal safety.
The content of the invention
It is an object of the invention to overcome prior art defect, there is provided a kind of oil-immersed current mutual inductance with explosion-protection equipment
Device, quick release internal pressure, it is to avoid the generation of explosion accident.
To reach above-mentioned purpose, the present invention is employed the following technical solutions：
A kind of oil-immersed current transformer with explosion-protection equipment, including metal expander, upper oil conservater, base and with it is upper
Oil conservater and base pour the insulator being fitted together, and upper oil conservater, insulator and base constitute transformer casing, transformer casing together
Built with transformer fuse, metal expander is arranged at the top of upper oil conservater；It is also connected with the upper oil conservater and base respectively
There is explosion venting device.
Further, described explosion venting device is made up of burst disk and mozzle, and two burst disks are separately mounted to oil storage
In perforate on the side opening of cabinet and below base, mozzle is installed outside burst disk, draft tube outlets are downward.
Further, two described mozzle one end are respectively welded flange, are accordingly welded with upper oil conservater and base
Flange, two mozzles are connected with upper oil conservater and base by flange respectively, and burst disk is fitted between two flanges.
Further, described burst disk is pre- impression metal explosion-proof piece.
Further, there are hole and flange in the upper end of the upper oil conservater, is connected with metal expander by flange.
The present invention includes metal expander, upper oil conservater and base, is also associated with respectively letting out on upper oil conservater and base
Quick-fried device, using two groups of explosion-protection equipments in addition to metal expander, is separately mounted to transformer top and bottom, works as transformer
During the slow breakdown fault of generation, internal pressure extends can metal expander, alleviate internal pressure and prompting failure.When extreme
When failure punctures generation, shock wave can make explosion-protection equipment action nearby, so as to quick release pressure, no matter hit inside transformer
The slow or swift and violent of generation is worn, or transformer punctures generation in fuse top, middle part or bottom, can guarantee corresponding guarantor
Protection unit action, so as to be prevented effectively from the generation of explosion accident.
Traditional metal expander is only capable of discharging former fault energy.It is then incompetent for the temporary impact ripple that causes is punctured
For power.So energy release should be carried out using explosion-proof chip architecture for this kind of failure.As shock wave is carried out with the characteristic of ripple
Propagate, when trouble point apart from venting of dust explosion mouth farther out when, shock wave can break through shell nearby and cause explosion, thus single position prevent
Quick-fried is not enough to suppress this blast.Venting of dust explosion is carried out respectively using upper end and bottom for this design.
Further, explosion venting device is made up of burst disk and mozzle, and mozzle, water conservancy diversion tube opening are installed outside burst disk
Down, make the high-temperature oil gas targeted release of release, it is to avoid secondary injury.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure：1- metal expanders；The upper oil conservaters of 2-；3- fuses；4- insulators；5- bases；6- burst disks；7- mozzles.
Specific embodiment
Describe the present invention below in conjunction with accompanying drawing：
With reference to Fig. 1, a kind of oil-immersed current transformer with explosion-protection equipment, its agent structure are oil-immersed inverted with common
Current transformer is mutually similar, mainly includes：Upper oil conservater 2, insulator 4 and base 5 pour the shell that dress constitutes transformer, transformer core
Son 3；Insulator and upper oil conservater and base are poured and are fitted together composition transformer casing, and transformer casing is built with transformer fuse
3.Also include the metal expander 1 being connected with upper oil conservater, and the explosion venting device being connected with upper oil conservater 2 and base 5 respectively.
There are hole and flange in the upper end of upper oil conservater, be connected with metal expander by flange, metal expander inner chamber and transformer
Intracavity inter-connection, the pressure of internal increase can be metal expander elongation, alleviate pressure increase and point out failure.
Upper oil conservater 2 lateral opening hole and weld a flange, also weld a flange in the corresponding end of mozzle 7,
Two flanges carry out assembly connection, and burst disk 6 is pressed between two flanges, and Open Side Down for mozzle, and the phase of lower section is avoided during installation
Close device.
In lower section perforate the welded flange of base 5, while in the upper end welding companion flange of mozzle 7, two flanges dress
With connection, it is opening down to clamp 6 mozzle of burst disk between two flanges, avoids related device.Because during transformer internal breakdown
The expansion shock wave of generation is very powerful, if puncturing generation in transformer cartridge lower, when expansion shock wave does not also come
And when being delivered to burst disk, this powerful shock wave is possible to make insulator bottom explode, so, the present invention is at transformer bottom
Seat is provided with explosionproof hole below, and covers and install burst disk.Burst disk 6 is pre- impression metal explosion-proof piece.
The present invention was removed and discharged the pressure that internal fault is produced with metal expander, pointed out, beyond failure, to have used two
Group explosion-protection equipment is separately mounted to transformer top and bottom.Explosion-protection equipment is made up of pre- impression metal explosion-proof piece and mozzle,
When transformer because certain reason punctures, the pre- impression metal of explosion-protection equipment nearby can be prevented by internal huge expansion shock wave
Quick-fried is washed open, and is discharged from mozzle.So as to the generation for avoiding exploding.
The transformer intracavity inter-connection that expansion apparatuss inner chamber and upper oil conservater, insulator, base are constituted, constitutes the of the transformer
One explosion-proof defence line.When internal because failure heating, when internal generation gas is that internal pressure is raised, metal expander is stretched
It is long, so as to buffer internal pressure, and point out failure.
When transformer internal breakdown, rapid to produce expansion shock wave, the shock wave can break through pre- impression burst disk, make inside
Pressure is discharged from mozzle.The effect of mozzle is so that the high-temperature oil gas targeted release for discharging, it is to avoid cause secondary injury.
Claims (4)
1. a kind of oil-immersed current transformer with explosion-protection equipment, it is characterised in that：Including metal expander (1), upper oil conservater
(2), base (5) and the insulator (4) being fitted together, upper oil conservater (2), insulator (4) are poured with upper oil conservater (2) and base (5)
Transformer casing is constituted together with base (5), and transformer casing is arranged on built with transformer fuse (3), metal expander (1)
At the top of upper oil conservater (2)；Explosion venting device is also associated with respectively on the upper oil conservater (2) and base (5)；
Described explosion venting device is made up of burst disk (6) and mozzle (7), and two burst disks (6) are separately mounted to oil conservater
(2) on side opening and base (5) perforate below on, outside burst disk (6) install mozzle (7), mozzle (7) export to
Under.
2. the oil-immersed current transformer with explosion-protection equipment according to claim 1, it is characterised in that：Leading described in two
Flow tube (7) one end is respectively welded flange, and flange, two mozzles (7) are accordingly welded with upper oil conservater (2) and base (5)
It is connected with upper oil conservater (2) and base (5) by flange respectively, burst disk (6) is fitted between two flanges.
3. the oil-immersed current transformer with explosion-protection equipment according to any one of claim 1-2, it is characterised in that：It is described
Burst disk (6) be pre- impression metal explosion-proof piece.
4. the oil-immersed current transformer with explosion-protection equipment according to any one of claim 1-2, it is characterised in that：It is described
There are hole and flange in the upper end of upper oil conservater (2), is connected with metal expander (1) by flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237171.0A CN104867670B (en) | 2015-05-11 | 2015-05-11 | Oil immersed type current transformer with explosion-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237171.0A CN104867670B (en) | 2015-05-11 | 2015-05-11 | Oil immersed type current transformer with explosion-proof device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104867670A CN104867670A (en) | 2015-08-26 |
| CN104867670B true CN104867670B (en) | 2017-04-19 |
Family
ID=53913444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510237171.0A Active CN104867670B (en) | 2015-05-11 | 2015-05-11 | Oil immersed type current transformer with explosion-proof device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104867670B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735438A (en) * | 2018-05-18 | 2018-11-02 | 云南电网有限责任公司电力科学研究院 | A kind of explosion-proof bushing lifting seat |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030753U (en) * | 1987-06-24 | 1989-01-11 | 锦州家用电器二厂 | Diaphragm alarm and explosion protection expansion means |
| FR2888034B1 (en) * | 2005-06-29 | 2010-10-08 | Philippe Magnier | DEVICE FOR PREVENTING THE EXPLOSION OF AN ELECTRICAL TRANSFORMER |
| CN201252001Y (en) * | 2008-07-08 | 2009-06-03 | 江苏思源赫兹互感器有限公司 | Explosion prevention oil immersion inverted vertical mutual inductor |
| CN201392730Y (en) * | 2009-04-24 | 2010-01-27 | 西安爱博电气有限公司 | High-voltage SF6 current transformer |
| CN202013795U (en) * | 2011-02-25 | 2011-10-19 | 上海休伯康特能源设备有限公司 | Amorphous alloy transformer of resisting explosion relief of oil |
| EP2849189A1 (en) * | 2013-09-12 | 2015-03-18 | Siemens Aktiengesellschaft | Wind turbine transformer arrangement |
| CN103943344B (en) * | 2014-04-29 | 2016-03-09 | 昆山达功电子有限公司 | Semiclosed explosion-proof oil-immersed current transformer |
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2015
- 2015-05-11 CN CN201510237171.0A patent/CN104867670B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104867670A (en) | 2015-08-26 |
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