CN101615503B - Vacuum extractor of transformer - Google Patents
Vacuum extractor of transformer Download PDFInfo
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- CN101615503B CN101615503B CN2009100394568A CN200910039456A CN101615503B CN 101615503 B CN101615503 B CN 101615503B CN 2009100394568 A CN2009100394568 A CN 2009100394568A CN 200910039456 A CN200910039456 A CN 200910039456A CN 101615503 B CN101615503 B CN 101615503B
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Abstract
The invention discloses a vacuum extractor of a transformer. A vacuometer is mounted in a cavity of the transformer or on a suction pipeline of a vacuum pump set; the vacuometer is provided with a circuit contact pair which can be closed when the vacuum degree measured by the vacuometer reaches a set value; the circuit contact pair is directly connected into a power supply circuit of a power-down delay type time relay to control the connection and disconnection of the power supply circuit of the power-down delay type time relay or control the connection and disconnection of the power supply circuit of the power-down relay delay type time relay through a relay; the power-down delay type time relay is provided with a delay disconnection normal-close contact; and the delay disconnection normal-close contact is connected to a power supply circuit of the vacuum pump set to control the connection and disconnection of the power supply circuit of the vacuum pump set. After the vacuum degree of vacuum extractor reaches a set value, a vacuum degree keeping time for continuously extracting vacuum for the transformer is automatically controlled by a time delay without arranging a special operator for monitoring and controlling, thereby the invention has the advantages of low manual cost as well as convenient and accurate control.
Description
Technical field:
The present invention relates to a kind of device that transformer is vacuumized of being used for.
Background technology:
When high-power transformer is installed, need carry out vacuum pumping, vaccum-pumping equipment with the vacuum degree of transformer after being extracted into set point, usually can not stop at once vacuumizing, and need on this basis transformer to be continued to vacuumize a period of time, be the usually said vacuum degree retention time, meet the required requirement of work with the vacuum degree of reliable assurance transformer.And for the transformer of different size and condition of work, vacuum degree that its work is required and vacuum degree retention time are often also inequality, when vacuumizing, need to arrange special operating personnel monitoring in real time and control vacuum degree retention time, meet the requirements to guarantee to vacuumize, its human cost height, workload are big, and make mistakes easily.
Summary of the invention:
The objective of the invention is to provide a kind of vacuum extractor of the vacuum of control transformer automatically,, reduce human cost and workload that transformer vacuumizes to realize the automatic operation of transformer vacuum.
The vacuum extractor of transformer of the present invention, comprise the vacuum pump group that extracts air in the transformer, the air intake duct of vacuum pump group is communicated with transformer, the blast pipe of vacuum pump group is communicated with atmosphere, in the cavity of its transformer or on the air intake duct vacuum gauge is installed, has the circuit contact of closure in the time of reaching set point in the vacuum degree that vacuum gauge records right on the described vacuum gauge; This circuit contact is to the break-make of control power-off delay type time relay power supply circuits in the power supply circuits of the direct access power-off delay type time relay; Perhaps control the break-make of the power supply circuits of the power-off delay type time relay by relay; The normally-closed contact that the power-off delay type time relay has time-delay to disconnect, the normally-closed contact that its time-delay disconnects inserts in the power supply circuits of vacuum pump group, the break-make of control vacuum pump group power supply circuits; When the vacuum pump group is extracted into set point with the vacuum degree of transformer, circuit contact on the vacuum gauge is to closure, the power supply circuits conducting of the power-off delay type time relay, the power-off delay type time relay gets electric work, its work is after specified time of delay, automatic disconnection inserts the normally-closed contact that the time-delay in the vacuum pump group power supply circuits disconnects, thereby the vacuum pump group is quit work.
The vacuum extractor of transformer of the present invention, when the vacuum pump group is extracted into set point with the vacuum degree of transformer, circuit contact on the vacuum gauge is to closure, circuit contact is to the power supply circuits of the direct conducting power-off delay type time relay, perhaps control the conducting of the power supply circuits of the power-off delay type time relay by relay, the power-off delay type time relay gets electric work, its work is after specified time of delay, automatic disconnection inserts the normally-closed contact that the time-delay in the vacuum pump group power supply circuits disconnects, thereby the vacuum pump group is quit work.Its vacuum degree retention time is controlled by the power-off delay type time relay automatically by the decision of the power-off delay type time relay, does not need to arrange special staff, and human cost is low, and control is convenient, and control accurately.
Description of drawings:
Fig. 1 is a kind of system configuration schematic diagram of vacuum extractor of transformer;
Fig. 2 is a kind of control principle figure of vacuum extractor of transformer;
Fig. 3 is a kind of control principle figure of vacuum extractor of transformer;
Fig. 4 is a kind of control principle figure of vacuum extractor of transformer.
Embodiment:
The vacuum extractor of transformer, as Fig. 1, Fig. 2, comprise the vacuum pump group 1 that extracts air in the transformer, the air intake duct 2 of vacuum pump group is communicated with transformer 3, the blast pipe 4 of vacuum pump group is communicated with atmosphere, in the cavity of its transformer or on the air intake duct vacuum gauge 5 is installed, there is circuit contact right on the vacuum gauge, closure when circuit contact reaches the set point of vacuum gauge to the vacuum degree that records at vacuum gauge, circuit contact is in the power supply circuits that directly are connected on power-off delay type time relay KT1, as Fig. 2, when it is closed, time relay KT1 work, when it disconnected, time relay KT1 did not work.The normally-closed contact KT1-1 that time relay KT1 has time-delay to disconnect, the normally-closed contact that this time-delay disconnects inserts in the power supply circuits of vacuum pump group, connects with the contactor AKM of control vacuum pump group work, when the normally-closed contact KT1-1 that time-delay disconnects is closed, contactor AKM energising, the work of vacuum pump group; When the normally-closed contact KT1-1 that time-delay disconnects disconnects, contactor AKM outage, the vacuum pump group quits work.When it reached set point in vacuum degree, circuit contact was to closure, and the time relay gets electric, and the normally-closed contact that its time-delay disconnects is the meeting automatic disconnection behind delay time, thereby realized the control to the vacuum degree retention time that vacuumizes automatically.
The circuit contact of vacuum gauge 5 is to also controlling the break-make of the power supply circuits of power-off delay type time relay KT1 by auxiliary relay, as Fig. 3, the circuit contact of vacuum gauge is to the coil KA4 of the auxiliary relay of connecting, the normally opened contact KA4-1 of this auxiliary relay connects again in the power supply circuits of power-off delay type time relay KT1, the normally-closed contact KT1-1 that power-off delay type time relay KT1 has time-delay to disconnect, the normally-closed contact KT1-1 that its time-delay disconnects inserts in the power supply circuits of vacuum pump group, connect the break-make of control vacuum pump group power supply circuits with the contactor AKM of control vacuum pump group work.When vacuum degree reaches set point, the circuit contact of vacuum gauge is to closure, the coil KA4 of auxiliary relay gets, it is connected on the normally opened contact adhesive in the time relay power supply circuits, time relay KT1 gets electric work, the normally-closed contact KT1-1 that its time-delay disconnects realizes the automatic control to the vacuum degree retention time that vacuumizes through meeting automatic disconnection behind the delay time.
Described vacuum pump group can be an independent vacuum pump, also can be the multipole pump configuration that forms that a plurality of vacuum pumps are connected mutually.Fig. 1 is the two-stage vacuum pump configuration that is in series mutually by two vacuum pumps, and it is in series by lobe pump 11 and slide valve pump 12, and the air intake duct of lobe pump is communicated with transformer 3, and blast pipe connects the air intake duct of slide valve pump, and the blast pipe of slide valve pump is communicated with atmosphere.It can carry out twin-stage to transformation gas and vacuumizes, and the vacuum degree that vacuumize the efficient height, can be evacuated to is also higher.Electromagnetism charge valve 13 can be installed by the air intake duct place of slide valve pump 12, with the air pressure in the regulating slide valve pump.Between slide valve pump and lobe pump bellows 14 can be installed.
It is how right to optionally connected circuit contact of going into to have on the vacuum gauge of the vacuum extractor of transformer, each circuit contact is to closure when the vacuum degree of vacuum gauge reaches different value respectively, each circuit contact is to all being in series with the coil of an auxiliary relay, the normally opened contact of each auxiliary relay all is connected in the power supply circuits of each self-corresponding power-off delay type time relay, the break-make of the control power-off delay type time relay separately, the normally-closed contact that each time relay all has time-delay to disconnect, the normally-closed contact that the time-delay of all time relays disconnects all series connection is simultaneously gone in the power supply circuits of vacuum pump group, controls the work of vacuum pump group simultaneously.As Fig. 4, a kind of vacuum extractor of transformer, its vacuum gauge 5 has four branch roads that insert power supply, article four, the switch S B1 of selection with branch road access or deenergization all is installed in the branch road, SB2, SB3, SB4, all there is a pair of circuit contact right in every branch road, each circuit contact is to being connected with the coil KA4 of auxiliary relay separately respectively, KA5, KA6, KA7, but the auxiliary relay coil of each branch road is respectively to there being the normally opened contact KA4-1 of adhesive separately, KA5-1, KA6-1, KA7-1, each normally opened contact is connected respectively into a power-off delay type time relay KT1, KT2, KT3, in the power supply circuits of KT4, the break-make of the power supply circuits of the control time relay separately, each time relay KT1, KT2, KT3, the normally-closed contact KT1-1 that KT4 all has time-delay to disconnect, KT2-1, KT3-1, KT4-1, the normally-closed contact that these time-delays disconnect is connected mutually, and connects with the contactor AKM that powers to the vacuum pump group.The circuit contact of its different branch is to being set to closure when the different vacuum degree, can the connect power-off delay type time relay of different delayed time time of the normally opened contact of the auxiliary relay of different branch, select different branch roads to insert power supply by switch, can adapt to different vacuum degrees and the requirement of vacuum degree retention time, the vacuum extractor of an one transformer, can adapt to the instructions for use that vacuumizes of different transformers, applied widely.
In addition; the vacuum extractor of above-mentioned existing transformer; its air intake duct directly is communicated with the transformer inner chamber; after vacuumizing to a certain degree; the transformer chamber pressure can be lower than external pressure; if this moment, vacuum pump hindered or power failure etc. is former thereby shut down for some reason; suck-back can take place; lubricating oil in the vacuum pump group may suck-back such as the transformer cavity in; pollute transformer; influence the insulation property of transformer, even may cause and think a short circuit and blast, use to transformer and bring serious harmful effect.Transformer after contaminated needs dismounting, cleans, and is serious even needs back factory and office to manage, and causes greater loss.Taking place for fear of above-mentioned situation, on vacuum pump group 1 and the pipeline that transformer 3 is connected, also is 2 non-return valve 6 can be installed on the air intake duct of vacuum pump group.6 of non-return valves allow the medium one-way flow, in the vacuum, when causing vacuum extractor to shut down because of power failure, fault or other emergency; be subjected to the restriction of non-return valve; lubricating oil in the vacuum pump group can't be gone in the transformer by suck-back, thereby can avoid the pollution of greasy dirt to transformer, and is safe.
In addition, the power that vacuumizes the vacuum pump in the vacuum pump group of use for its of high-power transformer is all bigger usually, its course of work can be distributed a large amount of heat, in order to guarantee the normal operation of vacuum pump, the adverse effect of avoiding high temperature to bring to vacuum pump need be cooled off it in the course of work of vacuum pump.Existing vacuum pump generally adopts water-cooled, and its housing at vacuum pump is equipped with cooling water pipe, and cold water enters after heating up after the vacuum pump heat absorption from the cooling water pipe inlet, and hot water is discharged by the cooling water pipe outlet.It needs continuously to feed cooling water in the cooling water pipe of vacuum pump and cools off, and the cooling water inflow of consumption is big, comparatively waste water resource.And need in its cooling procedure to consume a large amount of cooling waters, thus field of employment existence restriction, only be applicable to place with sufficient water source, for the place of lack of water, use comparatively difficulty, even can't use.In order to address the above problem, the water inlet communication loop water tank 7 of the cooling line of installing on vacuum pump group 1 intermediate pump 12, its delivery port is communicated with the oral siphon of air-cooled cooler 8, the outlet pipe of air-cooled cooler is connected with cyclic water tank again, cooling line, air-cooled cooler and cyclic water tank are linked to be the loop of a closure, the water pump 9 that drives flow of cooling water is installed on the pipeline of this closed-loop path, water pump 9 can only have one, also can there be two, as Fig. 1, on the oral siphon of the cooling line of its vacuum pump 12 intake pump is installed, on the outlet pipe of cooling line water pump is installed out.Cooling water in its cyclic water tank 7 is going out water pump and is going under the driving of water pump, flowing into 12 pairs of vacuum pumps of vacuum pump cools off, absorb the heat of vacuum pump and temperature raises, the cold cooler 8 of flow of hot water inlet air after temperature raises, in air-cooled cooler with the air heat exchange, temperature reduces, then in flowing into cyclic water tank, for cooling vacuum pump use once more, the cooling water of its vacuum pump can be recycled, and it has greatly reduced the consumption of cooling water, for the application place without limits, both made environment, and also can use in the extreme lack of water, applied widely.Described air-cooled cooler and cyclic water tank can be the structure of separating separately, as Fig. 1, also can be the structure of integral type, for example self have water tank, the volume of refrigerating function bigger can liquid storage cooler etc., it guaranteed the hydronic while of vacuum pump, reduced the volume of cooling device for vacuum pump, also made the structure of device simpler.The fan 15 of air-cooled cooler 8 can be controlled its start and stop by thermostat 10, thermostat probe directly inserts cyclic water tank, starting fan when the cyclic water tank temperature is higher than design temperature, under air-cooled effect, water temperature is reduced to the required chilling temperature of vacuum pump rapidly, meet cooling when requiring when temperature is reduced to, fan stops.It is both in the reliable cooling that guarantees vacuum pump, the duration of runs of the minimizing fan that can try one's best again, the consumption of having saved electric energy.
Claims (7)
1. the vacuum extractor of transformer, comprise the vacuum pump group that extracts air in the transformer, the air intake duct of vacuum pump group is communicated with transformer, the blast pipe of vacuum pump group is communicated with atmosphere, in the cavity of its transformer or on the air intake duct vacuum gauge is installed, it is characterized in that: have the circuit contact of closure in the time of reaching set point in the vacuum degree that vacuum gauge records right on the vacuum gauge; This circuit contact is to the break-make of control power-off delay type time relay power supply circuits in the power supply circuits of the direct access power-off delay type time relay; Perhaps control the break-make of the power supply circuits of the power-off delay type time relay by relay; The normally-closed contact that the power-off delay type time relay has time-delay to disconnect, the normally-closed contact that its time-delay disconnects inserts in the power supply circuits of vacuum pump group, the break-make of control vacuum pump group power supply circuits; When the vacuum pump group is extracted into set point with the vacuum degree of transformer, circuit contact on the vacuum gauge is to closure, the power supply circuits conducting of the power-off delay type time relay, the power-off delay type time relay gets electric work, its work is after specified time of delay, automatic disconnection inserts the normally-closed contact that the time-delay in the vacuum pump group power supply circuits disconnects, thereby the vacuum pump group is quit work.
2. the vacuum extractor of transformer according to claim 1 is characterized in that: described vacuum pump group only is an independent vacuum pump, perhaps is in series mutually for two or more vacuum pumps.
3. the vacuum extractor of transformer according to claim 1, it is characterized in that: described vacuum pump group is in series by lobe pump and slide valve pump, the air intake duct of lobe pump is communicated with transformer, and blast pipe connects the air intake duct of slide valve pump, and the blast pipe of slide valve pump is communicated with atmosphere.
4. the vacuum extractor of transformer according to claim 1, it is characterized in that: many branch roads that can insert power supply are arranged on the vacuum gauge of the vacuum extractor of transformer, switch is all arranged on each branch road, every branch road all has circuit contact right, each circuit contact is to closure when the vacuum degree of vacuum gauge reaches different value respectively, each circuit contact is to all being in series with the coil of auxiliary relay, the normally opened contact of the auxiliary relay of described each branch road all is connected in the power supply circuits of each self-corresponding power-off delay type time relay, the break-make of the control power-off delay type time relay separately, the normally-closed contact that each power-off delay type time relay all has time-delay to disconnect, the normally-closed contact that the time-delay of all time relays disconnects is connected in the power supply circuits of vacuum pump group simultaneously, controls the work of vacuum pump group simultaneously.
5. the vacuum extractor of transformer according to claim 1 is characterized in that: on the air intake duct of vacuum pump group non-return valve is installed.
6. the vacuum extractor of transformer according to claim 1, it is characterized in that: on the vacuum pump of vacuum pump group cooling line is installed, the water inlet communication loop water tank of cooling line, its delivery port is communicated with the oral siphon of air-cooled cooler, the outlet pipe of air-cooled cooler is connected with cyclic water tank again, cooling line, air-cooled cooler and cyclic water tank are linked to be the loop of a closure, and the water pump that drives flow of cooling water is installed on the pipeline of this closed-loop path.
7. the vacuum extractor of transformer according to claim 3 is characterized in that: between described lobe pump and slide valve pump bellows is installed, the electromagnetism charge valve is installed on the air intake duct of slide valve pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100394568A CN101615503B (en) | 2009-05-13 | 2009-05-13 | Vacuum extractor of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100394568A CN101615503B (en) | 2009-05-13 | 2009-05-13 | Vacuum extractor of transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101615503A CN101615503A (en) | 2009-12-30 |
| CN101615503B true CN101615503B (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100394568A Expired - Fee Related CN101615503B (en) | 2009-05-13 | 2009-05-13 | Vacuum extractor of transformer |
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| CN (1) | CN101615503B (en) |
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| CN106969877B (en) * | 2017-02-21 | 2019-05-07 | 国网浙江省电力公司嘉兴供电公司 | Electrical equipment is vacuum-treated automatic monitoring equipment and its monitoring method |
| CN108868312B (en) * | 2018-07-27 | 2020-03-06 | 国网冀北电力有限公司检修分公司 | Warning equipment and warning shelter |
| CN110345047A (en) * | 2019-08-22 | 2019-10-18 | 中车青岛四方车辆研究所有限公司 | Vacuum system exhaust noise silencing method, silencing means and vacuum system |
| CN111946591A (en) * | 2020-07-30 | 2020-11-17 | 浙江凯立特真空科技有限公司 | Booster pump/slide valve vacuum unit |
| CN114017285A (en) * | 2021-10-25 | 2022-02-08 | 中国南方电网有限责任公司超高压输电公司广州局 | Vacuum air extractor |
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| CN201408646Y (en) * | 2009-05-13 | 2010-02-17 | 广东火电工程总公司 | Vacuum extractor of transformer |
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2009
- 2009-05-13 CN CN2009100394568A patent/CN101615503B/en not_active Expired - Fee Related
Patent Citations (7)
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|---|---|---|---|---|
| CN2268131Y (en) * | 1996-01-29 | 1997-11-19 | 周宝洪 | Improved Roots vaccum pump |
| CN2322257Y (en) * | 1998-01-14 | 1999-06-02 | 彩虹彩色显象管总厂 | Vacuum monitor controller for kinescope air discharging small vehicle |
| CN2352730Y (en) * | 1998-04-22 | 1999-12-08 | 祁孙成 | Vacuum pumping machine set for smelting with additional oil filter |
| CN2695845Y (en) * | 2003-08-11 | 2005-04-27 | 王文华 | Electronic water cooling radiating air conditioning device |
| CN200943575Y (en) * | 2006-08-22 | 2007-09-05 | 天津力神电池股份有限公司 | Full-automatic vacuum box |
| CN201036314Y (en) * | 2006-11-20 | 2008-03-19 | 上海多乐鲜保鲜设备制造有限公司 | Steaming and boiling food vacuum fast cooling machine |
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Non-Patent Citations (1)
| Title |
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| JP特开2006-322405A 2006.11.30 |
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| CN101615503A (en) | 2009-12-30 |
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