CN105529212A - Oil tank pressure relay protection device and protection method for transformer - Google Patents
Oil tank pressure relay protection device and protection method for transformer Download PDFInfo
- Publication number
- CN105529212A CN105529212A CN201410570955.0A CN201410570955A CN105529212A CN 105529212 A CN105529212 A CN 105529212A CN 201410570955 A CN201410570955 A CN 201410570955A CN 105529212 A CN105529212 A CN 105529212A
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- transformer
- oil tank
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- pressure
- resorption
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Abstract
The invention relates to an oil tank pressure relay protection device and protection method for a transformer. Currently used oil pressure protection relay devices are old over-pressure protection devices of an explosion-proof pipe, an explosion-proof membrane and the like, and cannot effectively and quickly send out a signal to cut off a power supply to protect the transformer with an accurate action. The oil tank pressure relay protection device comprises a lower cavity (2), wherein the lower cavity is connected with an upper cavity (1) through a bolt; the upper cavity is connected with a test hole cover (16); a hole is formed in one side of the test hole cover; a relief plug (15) is arranged in the hole; a groove is formed in the upper cavity; an isolating corrugated pipe (14) is arranged in the groove and is arranged in a flange groove of the lower cavity; a balancer (9) is arranged in the flange groove; the groove is formed in the lower cavity; a spring (10) is arranged in the groove; a plane is formed in the lower part of the groove, and is provided with an operating corrugated pipe (8); and a micro-switch (7) is arranged at the lower part of the operating corrugated pipe (8). The oil tank pressure relay protection device is applied as the oil tank pressure relay protection device for the transformer.
Description
technical field:
the present invention relates to a kind of oil tank of transformer pressure protective relaying device and guard method.
background technology:
the oil pressure protection relay system of current use is all the old-fashioned over-pressure safety device such as pressure relief vent, rupture pressure disc, can not effectively fast, action sends accurately, rapidly signal and cuts off the electricity supply in time and to protect transformer.
the present invention utilizes the dynamic pressure speedup caused due to accident in fuel tank to carry out action, and oil pressure growth rate is faster, and action is rapider; Because the propagation velocity of oil pressure ripple in transformer oil is exceedingly fast, so quick oil pressure relay is quick on the draw, action is accurate, send signal rapidly and cut off the electricity supply, if install quick oil pressure relay on the transformer, there is pernicious short trouble once inner, can fuel tank explosion be prevented.
summary of the invention:
the object of this invention is to provide a kind of oil tank of transformer pressure protective relaying device and guard method
above-mentioned object is realized by following technical scheme:
a kind of oil tank of transformer pressure protective relaying device, its composition comprises: cavity of resorption, described cavity of resorption is connected with epicoele by bolt, described epicoele is connected with test port lid, described test port lid side has hole, described hole is built with air relief cock, described epicoele has groove, described groove is built with isolation bellows, described isolation bellows is arranged on described cavity of resorption tongue, described tongue is built with balancer, described cavity of resorption has groove, described groove is built with spring, below described groove, there is plane, described plane is equipped with operation bellows, below described operation bellows, sensitive switch is housed.
described oil tank of transformer pressure protective relaying device, described cavity of resorption side has line outlet, and described cavity of resorption is connected with junction block, just has hole on the right side of described cavity of resorption, and described hole is built with prod.
described oil tank of transformer pressure protective relaying device, described cavity of resorption side has vertical plane, horizontal plane, and described vertical plane is connected with described epicoele respectively with described horizontal plane.
described oil tank of transformer pressure protective relaying device, described epicoele has groove, forms grease chamber between described groove and described isolation bellows, and described epicoele has ring flange, and described ring flange has through hole.
described oil tank of transformer pressure protective relaying device, has groove bottom described cavity of resorption, forms air chamber B between described groove and described operation bellows, forms air chamber A between described cavity of resorption tongue and described isolation bellows.
a kind of oil tank of transformer pressure protective relaying device and guard method, the method comprises the steps: it is first that On-Line Oil Filters for On-Load Tap-Changer in Transformers filters transformer oil, by the pressure of oil pump, transformer oil is completed in the filter tank of filter core;
first when transformer normally runs, oil tank of transformer pressure protective relaying device installation site is lower than transformer oil upper thread, the grease chamber of oil tank of transformer pressure protective relaying device is communicated with oil tank of transformer, isolate bellows in grease chamber and be subject to less quiet oil pressure, spring in air chamber A compensates this quiet oil pressure and reaches balance, and oil tank of transformer pressure protective relaying device is failure to actuate;
when inside transformer breaks down; grease chamber's internal pressure rises suddenly; when pressure reaches operating value; described isolation bellows compressive deformation; pressure in air chamber A raises; impel the displacement of operation bellows; make sensitive switch action; sending signal and cutting off the electricity supply makes transformer out of service, in relay inside, balancer is housed, by the effect of balancer simultaneously; when inside transformer pressure because non-faulting reason slowly increases; but during lower than certain numerical value, pressure switch can not action, implements protection to transformer.
beneficial effect:
1. the present invention utilizes the dynamic pressure speedup caused due to accident in fuel tank to carry out action, and oil pressure growth rate is faster, and action is rapider; Because the propagation velocity of oil pressure ripple in transformer oil is exceedingly fast; so quick oil pressure relay is quick on the draw; action is accurate; send signal rapidly and cut off the electricity supply; if install tank pressure protective relaying device on the transformer; once inner, pernicious short trouble occurs, can prevent fuel tank explosion, this device can carry out safeguard protection to transformer effectively.
2. structure of the present invention is when transformer normally works; oil tank of transformer pressure protective relaying device installation site is lower than transformer oil upper thread; the grease chamber of oil tank of transformer pressure protective relaying device is communicated with oil tank of transformer; isolate bellows in grease chamber and be subject to less quiet oil pressure; spring in air chamber A compensates this quiet oil pressure and reaches balance, and oil tank of transformer pressure protective relaying device is failure to actuate.
3. structure of the present invention is that inside transformer breaks down; grease chamber's internal pressure rises suddenly; when pressure reaches operating value; described isolation bellows compressive deformation; pressure in air chamber A raises; impel the displacement of operation bellows; make sensitive switch action, send signal and cut off the electricity supply and make transformer out of service, in relay inside, balancer is housed simultaneously; by the effect of balancer; when inside transformer pressure because non-faulting reason slowly increases, but during lower than certain numerical value, pressure switch can not action; protection is implemented to transformer, reduces work risk.
4. structural principle of the present invention advanced, be active in one's movements, structure is reliable, can replace pressure relief vent completely, the over-pressure safety device that rupture pressure disc etc. are old-fashioned.
5. tank pressure protective relaying device of the present invention has quick open function; during the fault such as to be short-circuited in transformer running; tank pressure sharply raises; tank pressure reaches opening pressure value instantaneously; pressure pressure relieving valve automatically can be opened in 2 seconds; discharge tank pressure, protection fuel tank can not damage because of hypertonia.
6. tank pressure protective relaying device of the present invention has auto-reset function, and when the false pressure in fuel tank drops to pressure relief valve closing presure value, pressure relief valve is closed automatically, makes tank pressure higher than ambient pressure, prevents extraneous air, foreign material from invading.Avoid transformer contaminated.
7. the present invention has automatic transfer function, while earth pressure release is opened, can send signal and alarm signal, notify operations staff, guarantee work safety, reduces operational risk.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
embodiment:
embodiment 1:
a kind of oil tank of transformer pressure protective relaying device, its composition comprises: cavity of resorption 2, described cavity of resorption is connected with epicoele 1 by bolt, described epicoele is connected with test port lid 16, described test port lid side has hole, described hole is built with air relief cock 15, described epicoele has groove, described groove is built with isolation bellows 14, described isolation bellows is arranged on described cavity of resorption tongue, described tongue is built with balancer 9, described cavity of resorption has groove, described groove is built with spring 10, below described groove, there is plane, described plane is equipped with operation bellows 8, below described operation bellows, sensitive switch 7 is housed.
embodiment 2:
oil tank of transformer pressure protective relaying device described in embodiment 1, described cavity of resorption side has line outlet 3, and described cavity of resorption is connected with junction block 4, just has hole on the right side of described cavity of resorption, and described hole is built with prod 5.
embodiment 3:
oil tank of transformer pressure protective relaying device described in embodiment 1 or 2, described cavity of resorption side has vertical plane, horizontal plane, and described vertical plane is connected with described epicoele respectively with described horizontal plane.
embodiment 4:
embodiment 1 or the epicoele described in oil tank of transformer pressure protective relaying device described in 2 or 3 have groove, and form grease chamber 13 between described groove and described isolation bellows, described epicoele has ring flange 12, and described ring flange has through hole.
embodiment 5:
embodiment 1 or 2 or the oil tank of transformer pressure protective relaying device described in 3 or 4; bottom described cavity of resorption, there is groove; form air chamber B6 between described groove and described operation bellows, between described cavity of resorption tongue and described isolation bellows, form air chamber A11.
embodiment 6:
a kind of oil tank of transformer pressure protective relaying device and guard method, this method is first when transformer normally runs, oil tank of transformer pressure protective relaying device installation site is lower than transformer oil upper thread, the grease chamber of oil tank of transformer pressure protective relaying device is communicated with oil tank of transformer, isolate bellows in grease chamber and be subject to less quiet oil pressure, spring in air chamber A compensates this quiet oil pressure and reaches balance, and oil tank of transformer pressure protective relaying device is failure to actuate;
when inside transformer breaks down; grease chamber's internal pressure rises suddenly; when pressure reaches operating value; described isolation bellows compressive deformation; pressure in air chamber A raises; impel the displacement of operation bellows; make sensitive switch action; sending signal and cutting off the electricity supply makes transformer out of service, in relay inside, balancer is housed, by the effect of balancer simultaneously; when inside transformer pressure because non-faulting reason slowly increases; but during lower than certain numerical value, pressure switch can not action, implements protection to transformer.
embodiment 7:
embodiment 1 or 2 or the oil tank of transformer pressure protective relaying device described in 3 or 4, the installation steps of described oil tank of transformer pressure protective relaying device:
first by oil tank of transformer pressure protective relaying device, to be arranged on oil tank of transformer sidewall and in oil conservator, the distance of pasta is the position of 1 ~ 3 meter by a 50mm butterfly valve, miniature transformer is installed in the middle part of fuel tank.
(1) when transformer is equipped with oil circulating pump, oil tank of transformer pressure protective relaying device should not be contained in the region near flowline, in order to avoid when starting and stopping oil pump, misoperation appears in oil tank of transformer pressure protective relaying device;
(2) oil tank of transformer pressure protective relaying device, necessary at right angle setting in installation process, described air relief cock must in the upper end of protective device;
(3) after oil tank of transformer pressure protective relaying device is properly installed, described air relief cock is opened, until a small amount of oil flows out, then described air relief cock is tightened;
(4) after oil tank of transformer pressure protective relaying device installs, connection signal circuit, and open with it butterfly valve be connected, get final product transmission operation.
Claims (6)
1. an oil tank of transformer pressure protective relaying device, its composition comprises: cavity of resorption, it is characterized in that: described cavity of resorption is connected with epicoele by bolt, described epicoele is connected with test port lid, described test port lid side has hole, described hole is built with air relief cock, described epicoele has groove, described groove is built with isolation bellows, described isolation bellows is arranged on described cavity of resorption tongue, described tongue is built with balancer, described cavity of resorption has groove, described groove is built with spring, below described groove, there is plane, described plane is equipped with operation bellows, below described operation bellows, sensitive switch is housed.
2. oil tank of transformer pressure protective relaying device according to claim 1, is characterized in that: described cavity of resorption side has line outlet, and described cavity of resorption is connected with junction block, just has hole on the right side of described cavity of resorption, and described hole is built with prod.
3. oil tank of transformer pressure protective relaying device according to claim 1 and 2, is characterized in that: described cavity of resorption side has vertical plane, horizontal plane, and described vertical plane is connected with described epicoele respectively with described horizontal plane.
4. the oil tank of transformer pressure protective relaying device according to claim 1 or 2 or 3; it is characterized in that: described epicoele has groove; form grease chamber between described groove and described isolation bellows, described epicoele has ring flange, and described ring flange has through hole.
5. the oil tank of transformer pressure protective relaying device according to claim 1 or 2 or 3 or 4; it is characterized in that: bottom described cavity of resorption, there is groove; form air chamber B between described groove and described operation bellows, between described cavity of resorption tongue and described isolation bellows, form air chamber A.
6. a guard method for the oil tank of transformer pressure protective relaying device described in claim 1-5, is characterized in that: the method comprises the steps:
First when transformer normally runs, oil tank of transformer pressure protective relaying device installation site is lower than transformer oil upper thread, the grease chamber of oil tank of transformer pressure protective relaying device is communicated with oil tank of transformer, isolate bellows in grease chamber and be subject to less quiet oil pressure, spring in air chamber A compensates this quiet oil pressure and reaches balance, and oil tank of transformer pressure protective relaying device is failure to actuate;
When inside transformer breaks down; grease chamber's internal pressure rises suddenly; when pressure reaches operating value; described isolation bellows compressive deformation; pressure in air chamber A raises; impel the displacement of operation bellows; make sensitive switch action; sending signal and cutting off the electricity supply makes transformer out of service, in relay inside, balancer is housed, by the effect of balancer simultaneously; when inside transformer pressure because non-faulting reason slowly increases; but during lower than certain numerical value, pressure switch can not action, implements protection to transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410570955.0A CN105529212A (en) | 2014-10-23 | 2014-10-23 | Oil tank pressure relay protection device and protection method for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410570955.0A CN105529212A (en) | 2014-10-23 | 2014-10-23 | Oil tank pressure relay protection device and protection method for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105529212A true CN105529212A (en) | 2016-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410570955.0A Withdrawn CN105529212A (en) | 2014-10-23 | 2014-10-23 | Oil tank pressure relay protection device and protection method for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105529212A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057489A (en) * | 2019-05-07 | 2019-07-26 | 北京中瑞和电气有限公司 | A kind of power transformer on-Line Monitor Device and method based on transient state oil pressure feature |
| CN111894736A (en) * | 2019-12-24 | 2020-11-06 | 中国航发长春控制科技有限公司 | High-temperature-resistant precise pneumatic pressure annunciator |
-
2014
- 2014-10-23 CN CN201410570955.0A patent/CN105529212A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057489A (en) * | 2019-05-07 | 2019-07-26 | 北京中瑞和电气有限公司 | A kind of power transformer on-Line Monitor Device and method based on transient state oil pressure feature |
| CN111894736A (en) * | 2019-12-24 | 2020-11-06 | 中国航发长春控制科技有限公司 | High-temperature-resistant precise pneumatic pressure annunciator |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160427 |