CN203503550U - Oil-immersed transformer oil tank pressure relay protection device - Google Patents
Oil-immersed transformer oil tank pressure relay protection device Download PDFInfo
- Publication number
- CN203503550U CN203503550U CN201320626241.8U CN201320626241U CN203503550U CN 203503550 U CN203503550 U CN 203503550U CN 201320626241 U CN201320626241 U CN 201320626241U CN 203503550 U CN203503550 U CN 203503550U
- Authority
- CN
- China
- Prior art keywords
- oil tank
- oil
- bellows
- cavity shell
- lower cavity
- 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.)
- Expired - Fee Related
Links
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims description 21
- 238000007654 immersion Methods 0.000 claims description 17
- 239000004519 grease Substances 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 48
- 239000002828 fuel tank Substances 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
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- Transformer Cooling (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model provides an oil-immersed transformer oil tank pressure relay protection device. The existing transformer oil tank pressure relay protection device comprises a gas relay, a pressure release valve and a quick-action oil pressure relay. When a serious arc fault occurs in a transformer, the gas relay cannot completely protect a transformer oil tank under the condition that the inner pressure of the oil tank rapidly increases. The device provided by the utility model comprises a lower cavity casing body (1). A gas chamber (2) is in the lower cavity casing body. A wiring seat (3) and a micro switch (4) are arranged in the gas chamber. The micro switch is connected with an operation bellows (5). The operation bellows is connected with a spring (6). The spring is connected with an isolation bellows (7). The isolation bellows is connected with a gas plug (8). The gas plug is connected with an equalizer (9). The device provided by the utility model is used for protecting the transformer oil tank.
Description
technical field:
the utility model relates to a kind of oil tank for oil immersion type transformer pressure protective relaying device.
background technology:
for oil-filled transformer, when transformer inside is short-circuited fault, high temperature or electric arc can cause the decomposition of transformer oil, produce a large amount of gas, and the pressure in fuel tank is sharply raise.If by the earth pressure release of its generation not out,, fuel tank will be out of shape or break, and causes serious accident; this just need to arrange protective device it is protected; when transformer internal pressure raises, by protective device, realize the release to pressure, thereby protection fuel tank does not ftracture, explodes.
existing oil tank of transformer pressure protective device has Buchholz relay, pressure relief valve and quick oil pressure relay.Buchholz relay is arranged on the conduit between transformer main fuel tank and oil conservator, and Buchholz relay can detect a large amount of decomposition of the inner aerogenesis of transformer, oil level is too low and serious arc fault causes insulating oil.Buchholz relay reacts on the flow velocity size of oil gas, so slower but Buchholz relay has higher sensitivity responsiveness.Especially when the serious arc fault of the inner generation of transformer, Buchholz relay can not be realized the protective effect to oil tank of transformer completely in the tank internal pressure situation sharply raising.
summary of the invention:
the purpose of this utility model is to provide a kind of oil tank for oil immersion type transformer pressure protective relaying device.
above-mentioned object realizes by following technical scheme:
a kind of oil tank for oil immersion type transformer pressure protective relaying device; its composition comprises: lower cavity shell; the inside of described lower cavity shell has air chamber; junction block, sensitive switch are installed in described air chamber; described sensitive switch is connected with operation bellows, and described operation bellows is connected with spring, and described spring is connected with isolation bellows; described isolation bellows is connected with vent plug, and described vent plug is connected with balancer.
described oil tank for oil immersion type transformer pressure protective relaying device; described spring fitting is in the grease chamber of upper cavity shell; described spring, described isolation bellows are arranged in described grease chamber; the top of described upper cavity shell is provided with test port lid; described instrument connection covers has air relief cock, and described upper cavity shell has flange Connection Block.
described oil tank for oil immersion type transformer pressure protective relaying device, has line outlet on described lower cavity shell, and described line outlet is connected with described junction block, and the bottom of described lower cavity shell is provided with prod.
beneficial effect:
the utility model is when transformer normally moves, because quick oil pressure relay installation site is lower than transformer oil upper thread, relay grease chamber is communicated with oil tank of transformer, in grease chamber, isolation bellows is subject to less quiet oil pressure, spring in air chamber compensates and reaches balance this quiet oil pressure, and quick oil pressure relay is failure to actuate.When transformer inside, break down, grease chamber's internal pressure rises suddenly, when pressure reaches operating value, and isolation bellows compressive deformation, the pressure in air chamber raises, the displacement of operation bellows, sensitive switch moves, and sends signal and cut off the electricity supply to make transformer out of service.Can effectively protect the normal operation of transformer, reach best guard mode.
accompanying drawing explanation:
accompanying drawing 1 is structural representation of the present utility model.
embodiment:
embodiment 1:
a kind of oil tank for oil immersion type transformer pressure protective relaying device; its composition comprises: lower cavity shell 1; the inside of described lower cavity shell has air chamber 2; junction block 3, sensitive switch 4 are installed in described air chamber; described sensitive switch is connected with operation bellows 5, and described operation bellows is connected with spring 6, and described spring is connected with isolation bellows 7; described isolation bellows is connected with vent plug 8, and described vent plug is connected with balancer 9.
embodiment 2:
according to the oil tank for oil immersion type transformer pressure protective relaying device described in embodiment 1; described spring fitting is in the grease chamber 11 of upper cavity shell 10; described spring, described isolation bellows are arranged in described grease chamber; the top of described upper cavity shell is provided with test port lid 12; described instrument connection covers has air relief cock 13, and described upper cavity shell has flange Connection Block 14.
embodiment 3:
oil tank for oil immersion type transformer pressure protective relaying device according to described in embodiment 1 or 2, has line outlet 15 on described lower cavity shell, and described line outlet is connected with described junction block, and the bottom of described lower cavity shell is provided with prod 16.
embodiment 4:
above-mentioned oil tank for oil immersion type transformer pressure protective relaying device; install and line: 1. oil tank for oil immersion type transformer pressure protective relaying device by a 50mm butterfly valve be arranged on oil tank of transformer sidewall with oil conservator in the distance of pasta be 1～3 meter, as shown in the figure: miniature transformer is installed to fuel tank middle part.2. when transformer is equipped with oil circulating pump, relay should not be contained in the region near flowline, in order to avoid when starting and stopping oil pump, misoperation appears in relay.3. oil tank for oil immersion type transformer pressure protective relaying device must at right angle setting, and air relief cock is in upper end.4. after oil tank for oil immersion type transformer pressure protective relaying device is correctly installed, air relief cock is opened, until a small amount of oil flows out, then air relief cock is tightened.5. after quick oil pressure relay installs, connection signal circuit, and the butterfly valve being connected is with it opened, get final product transmission operation.
embodiment 5:
above-mentioned oil tank for oil immersion type transformer pressure protective relaying device, ambient temperature :-30～+ 50 ℃, to humidity: in the time of+20 ℃, be not more than 95%; Between sensitive switch binding post and current-carrying part should be able to bear over the ground that industrial frequency withstand voltage 2000V naked body generates heat, punctures, flashover phenomenon; The contact rating of sensitive switch is direct current 220V0.3A time constant t≤5 * 10-3S, and stream 220V0.3A powerfactorcosφ≤0.6 is sinusoidal wave at vibration frequency 4-20Hz(), during acceleration 4g, relay tip is failure to actuate.
Claims (3)
1. an oil tank for oil immersion type transformer pressure protective relaying device; its composition comprises: lower cavity shell; it is characterized in that: the inside of described lower cavity shell has air chamber; junction block, sensitive switch are installed in described air chamber; described sensitive switch is connected with operation bellows, and described operation bellows is connected with spring, and described spring is connected with isolation bellows; described isolation bellows is connected with vent plug, and described vent plug is connected with balancer.
2. oil tank for oil immersion type transformer pressure protective relaying device according to claim 1; it is characterized in that: described spring fitting is in the grease chamber of upper cavity shell; described spring, described isolation bellows are arranged in described grease chamber; the top of described upper cavity shell is provided with test port lid; described instrument connection covers has air relief cock, and described upper cavity shell has flange Connection Block.
3. oil tank for oil immersion type transformer pressure protective relaying device according to claim 1 and 2, is characterized in that: on described lower cavity shell, have line outlet, described line outlet is connected with described junction block, and the bottom of described lower cavity shell is provided with prod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626241.8U CN203503550U (en) | 2013-10-11 | 2013-10-11 | Oil-immersed transformer oil tank pressure relay protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626241.8U CN203503550U (en) | 2013-10-11 | 2013-10-11 | Oil-immersed transformer oil tank pressure relay protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203503550U true CN203503550U (en) | 2014-03-26 |
Family
ID=50334509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320626241.8U Expired - Fee Related CN203503550U (en) | 2013-10-11 | 2013-10-11 | Oil-immersed transformer oil tank pressure relay protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203503550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979133A (en) * | 2014-04-11 | 2015-10-14 | 铜仁市万山区顺宇电气有限公司 | Quick-acting oil pressure relay |
| CN110161357A (en) * | 2019-05-07 | 2019-08-23 | 西安交通大学 | A kind of oil-immersed power transformer pressure relief valve fault wave recording device and method |
-
2013
- 2013-10-11 CN CN201320626241.8U patent/CN203503550U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979133A (en) * | 2014-04-11 | 2015-10-14 | 铜仁市万山区顺宇电气有限公司 | Quick-acting oil pressure relay |
| CN110161357A (en) * | 2019-05-07 | 2019-08-23 | 西安交通大学 | A kind of oil-immersed power transformer pressure relief valve fault wave recording device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20201011 |