CN1262326C - Preparing device for transformer - Google Patents
Preparing device for transformer Download PDFInfo
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- CN1262326C CN1262326C CN 02106602 CN02106602A CN1262326C CN 1262326 C CN1262326 C CN 1262326C CN 02106602 CN02106602 CN 02106602 CN 02106602 A CN02106602 A CN 02106602A CN 1262326 C CN1262326 C CN 1262326C
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Abstract
The present invention relates to a device for heating and drying a component (2) with moisture absorption performance and electric insulation performance by condensation heat evaporated by heating liquid (a solvent or kerosene) in vacuum; the component (2) is made of fiber material or plastics. The device is especially used for preparing a new transformer or an old transformer, a capacitor and a measuring mutual inductor or a through flow insulating sheath, wherein in the period of heating the component (2), at least one kind of second liquid, such as transformer oil, with a high boiling point, is separated. The device is provided with a container, a vacuum pump (10), at least one condenser (3 and/or 8) and a heat exchanger (16) used for heating the liquid. In order to use a movable device for the site treatment of the existing transformer (2) in a working state, the heat exchanger (16) keeps heating the heating liquid in a liquid state; the heating liquid is evaporated on the container or in the container; for example, an expansion valve (18) and/or an expansion container directly installed on the container or an evaporator is used for evaporation.
Description
Technical field
The present invention relates to a kind of condensation heat that is used for utilizing in a vacuum the heating liquid evaporation heats and dry equipment the parts that have the hygroscopicity electric insulation of doing based on fibrous material or plastics.
Background technology
For fear of fault, need make the insulator of its moisture absorption do preventative reorganizing and outfit (Aufbereitung) for the power transformer in the power supply transformer station.Similarly, this also is fit to the situation that transformer is repaired or broken down, and at this moment, after device for transformer was opened, the insulator of the moisture absorption of transformer had absorbed moisture from surrounding air, and insulating properties are reduced.And insulating properties are also produced adverse influence because of depositing the aging of product that causes.
When maintenance or glitch, the driver unit of transformer can be retained in the housing and at the scene, promptly continue to use to remake to reorganize and outfit for it in transformer station.This had certain methods.
As the method for further reorganizing and outfit, used reorganizing and outfit by transformer oil.With round-robin method work oil is shifted out from transformer in the case, and import in the closed circulation loop, be removed moisture here, and import in the transformer again by the vacuum preparation facilities.With contacting of dry oil and insulator, can from insulator, get rid of moisture by reorganizing and outfit equipment room ground connection like this.
In other method, promptly in so-called " oil spurts method ", the major part of oil is discharged from transformer, can make insulator place vacuum thus.Make the transformer heating and the connected vavuum pump of moisture of evaporation is extracted out by insulating oil being ejected into transformer inside.
In addition, also have said method and recirculated hot air or with by flowing through the direct combination of heating winding in current segment ground.
But all said methods have its shortcoming, are used for dry temperature and are subjected to the considerable restraint that insulating oil exists and participates in using.It is same because dipping has influenced the diffusion of steam significantly.Therefore it is time taking especially reorganizing and outfit process.Another shortcoming is in the underheat of the position upper insulator that is unfavorable for flowing, especially can not remove deposit in inaccessible passage.
Under the major break down situation, transformer substation must be transported and in repair shop, dismantle, and reorganized and outfit again as described above.
Usually, the insulator of current power transformer, the winding that especially constitutes with driver unit are used 26 682 A1 according to DE198 during coming of new in manufactory, and DE196 37 313 A1 or the described gas phase process of DE44 46 204 C1 carry out drying.Here the solution vapor heating that in a big vacuum autoclave, produces in by an evaporimeter of driver unit and the insulated part that comprises, and stand strong purification in the case.
This method is effective especially, but is far from suitable for reorganizing and outfit of the transformer that is in operation at the scene, because under transportable drying equipment situation, can not be implemented for the required big cross section of heat carrier to transformer input steam condition.
Summary of the invention
Set out thus, task of the present invention is, avoids above-mentioned shortcoming and reorganizes and outfit transformer especially at the scene, and make it stand strong washing simultaneously.Preferably the oil that takes out is purified in the case.
According to the present invention, this task will solve by following equipment:
A kind ofly be used for utilizing in a vacuum a kind of heating liquid (solvent, kerosene) Zheng Fa condensation heat heats and dry equipment the parts that have the hygroscopicity electric insulation of doing based on fibrous material or plastics, be particularly useful for new or old transformer, capacitor, measure reorganizing and outfit of transformer or through-flow insulation sleeve, wherein at these parts second higher liquid of at least a boiling point between the period of heating, separated out as transformer oil, this equipment has a container, a vavuum pump, at least one condenser and a heat exchanger that is used for heating liquid, wherein, heat exchanger keeps liquid ground that heating liquid is heated, and on a container or just be evaporated in the container, evaporate for example by expansion valve, and/or at the expansion vessel or the evaporimeter that directly are contained on the container.
Because can realize or remain on advantage as much as possible in described three pieces of documents by the present invention, in this respect will be with reference to whole schemes there.
Heat exchanger makes the heating liquid heating according to the present invention, so that heating liquid is maintained at liquid state.Evaporation just takes place on container or in the container, for example takes place by expansion valve, or evaporates by the pressure decline of there generation or by the evaporimeter that separates in the expansion vessel on being directly arranged in container.
This equipment can make static or move, and the fuel tank that wherein uses transformer to be heated is as described container.Suitable in the case is, make between the heat exchanger of heating liquid heating and the expansion valve and/or between the delivery pump of the drain valve of container and equipment and/or the connection between container and the one or more blocking valve be detachable.Therefore this equipment is easy to be transported to its corresponding place to use and connects there.
Wherein used a detachable exchanging container that is used for heating liquid, the heating liquid that is reduced performance by transformer oil that has used directly can have been removed thus, processed and in place in addition very simply with the new liq input transformer.
In order to improve efficient, oil tank of transformer can be used portable heat-barrier material, as the fluffy or portable additional heater of thermal insulation board, felt pad, wall unit, single wall or double-walled resistance to compression heat insulation or or by external heat, wherein provide air heater for movable type work.
The expansion valve that makes heating liquid enter fuel tank expansion and evaporation there can replace with expansion vessel, and the latter is provided with a tubulature that leads to the heating liquid that is used to be evaporated of container.This expansion vessel has a return-flow catheter that is used for unevaporated heating liquid.Therefore the critical path of the heating liquid that is used to be evaporated can keep very short with meeting the requirements.
Expansion vessel also can be located on the oil tank of transformer.Importantly, the tubulature that is used to the heating liquid that is evaporated is connected to oil tank of transformer.When being provided with an input pipe of linking condenser, after the sealing heating, can realize the better distillation of solvent composition from mixture.
If expansion vessel have one can be through-flow double casing, then heated heating liquid its evaporation before can flow through it, to prevent heat loss.
In a form of implementation of the present invention,, be provided with a thin layer evaporator in order to separate the heating liquid of having been assembled that flows out by expansion vessel.When thin layer evaporator had an input pipe that leads to condenser, the steam that forms when pressure descends can directly be transported to condenser.
In another form of implementation, light-duty, a compact thin layer evaporator can directly be fixed on the oil tank of transformer as plate-type evaporator.Can realize the short path of steam thus.
Another configuration according to the present invention can be considered: the composition of having been assembled that is flowed out by expansion vessel is transported to a rearmounted thin layer evaporator that is used for the separation of solvent residue by valve and pressure disabler by gravity, and the steam that it forms when pressure descends directly is transported to condenser by valve.Can realize optimal separation thus.To consider in another configuration of the present invention: the pressure disabler is made of delivery pump and a threshold switch, and finisher is installed in this mobile unit.Can realize thus, must not be fixed on the oil tank of transformer, so that reduce manual cost significantly in the preparatory stage of evaporimeter.
As long as position resolver is low, so that there is not the position to receive the heating liquid that from fuel tank, flows out, a delivery pump that is used for little injecting height then can be set, it preferably is made to liquid annular pump or extrusion pump, and using an intermediate receptacle of installing higherly, this intermediate receptacle continues heating liquid is transported to heat exchanger and/or evaporimeter with rearmounted drum pump.Therefore intermediate receptacle has been realized the injecting height that drum pump is enough.
For finish in heating the back and the intermediate pressure of sealing descend finish after purifying solvent effectively, a thin layer evaporator can be set, it has the input pipe and the discharge tube that leads to exchanging container that lead to condenser.
Other purposes of the present invention, advantage, feature and application possibility can be from following by obtaining the description of accompanying drawing to embodiment.Wherein all descriptions and/or diagram feature itself or any significant theme of the present invention that constituted, it does not depend on the notion that claim or its time are drawn.
Description of drawings
Fig. 1: according to of the device that has in oil tank of transformer a directly evaporation of the present invention
Form of implementation;
Fig. 2 and 3: according to the form of implementation with expansion vessel of the present invention;
Fig. 4: be similar to the embodiment of Fig. 2 and 3, but have additional thin layer evaporator;
Fig. 5: according to the form of implementation with the intermediate receptacle that is used for liquid of the present invention; And
Fig. 6 and 7: two other form of implementation with thin layer evaporator.
The specific embodiment
Device shown in Figure 1 has an oil tank of transformer 1, wherein has one or more parts, for example driver unit 2.Drying equipment shown in Figure 1 advantageously is connected on the oil tank of transformer 1 with flexible connecting duct.Be connected with two condensers 3 and 8 by valve 4,6 and 7.Container 8 is by cooling device 9 coolings.On container 8, be connected with a vavuum pump 10.On condenser 3, connecting separation container 5.A drain valve 20 of kerve guiding that has the conduit of delivery pump 19 from condenser 3.Conduit from the zone line of this kerve by valve 11 guiding fuel level sensor 13 and delivery pumps 14.This conduit is also by valve 21 and exchanging container 24 of 23 guiding.A conduit that has valve 12 of being drawn by the kerve 1.1 of fuel tank 1 also leads to delivery pump 14.A conduit leads to the heat exchanger 16 that is used for hot liquid from this delivery pump through filter 15.Heat exchanger 16 is by heater 17 heating.Conduit is located at expansion valve 18 on the fuel tank 1 with heated hot liquid guiding.
In a mobile unit, between oil tank of transformer 1 and this equipment, for example between parts 16 and 18,12 and 14 and between 1 and 7 or 1 and 4, be provided with flexibly, removable jockey or joint.
The function of this equipment and wherein being used to heats, pressure descends and the method for liquid regeneration is described in detail in DE198 26 682 A1 by static equipment, among DE196 37 313 A1 or DE44 46 204 C1.
As heat carrier, in non-moving type gas phase equipment, use a kind of heating liquid, be a kind of solvent, as kerosene.According to the present invention, this solvent is heated in heat exchanger 16 with liquid form, and is injected in the transformer inside 1 by expansion valve 18.The part of this liquid flux enters and is evaporated in the vavuum pump 10 evacuated transformer inside 1, and by condensations that follow, on the cold parts of transformer driver unit condensation heat is delivered on the cold position, is heated thus.
The solvent part that is not evaporated, play the thermal store effect flows with the insulator of condensate liquid by driver unit 2, impels heating thus and participates in purified treatment simultaneously.Dirt reaches by delivery pump 14 outputs and separates from circulating path in filter 15.
Because this solvent relates to a kind of good solvent, it makes attached to the oil component on the insulator and is washed and be dissolved in solvent fully.This mixture will be sent to delivery pump 14 by valve 12.Oil removing by insulator reaches because the existence of oxygen can move under the high temperature of common gas phase process.By the minimizing of oil component, can reach high operating temperature on the one hand, can realize high water vapor diffusion on the other hand.
By the control device that is fit to, pump 14 at first makes solvent export by valve (21,23 and 11) from storage container 24.Condensate liquid that flows out in transformer and unevaporated part form the surge volume 1.1 that increases in the transformer bottom.When surge volume was enough, valve 12 was opened, and valve 21 is closed, and has formed the closed circuit of a closure thus.The driver unit 2 that is arranged in own housing 1 is heated on the required baking temperature.Be connected with cut-off radiation on it in the case.In order to reduce thermal losses, transformer housing 1 can be isolated by suitable heat the outside and protected.
In whole drying and purification process, determine according to oil mass to be processed for the quantity of solvent of using.To consider for king-sized transformer: when needed, in processing, use the container that has purifying solvent to replace and have the container 24 that uses solvent (heat carrier).The container that has solvent slop will be connected with big gas phase equipment or solvent reclaimer, with the oil of separate dissolved.In this way, this solvent always can re-use.And dissolved oil can be originally separated on one's body at equipment when handling intermittently, will describe as following.
Because this equipment is preferentially to use design in order to move, usually supply of electrical energy when work.But can use the heat exchanger of natural gas or fuel Heating equally.Being used for the required condenser of process control 3 the most handy air cools off.
To come cooler condenser 8 with a cooling device 9 in order to protect vavuum pump or vavuum pump group 10.
The blank gas of steam that discharges in this process and intrusion is inhaled in the condenser 3 by the solvent vapour of the little deal self-checking device 4 by a valve form.Here steam and solvent are condensed and accumulate in the separation container 5.Solvent then flow back in the solvent closed circuit and participate in heating process again in heat exchanger 16.Separated water is pumped out separation container 5 by pump 19.
Other drying steps carries out in the mode identical with big gas phase equipment (Gross-Vapour-Phase-Anlagen) in above-mentioned three pieces of documents.
Except that the mobile use of above-mentioned gas phase equipment, the equipment that this equipment also can be used as cost efficient combines with a vacuum drying container as static equipment use.
Fig. 2 represents a similar form of implementation, but it has an expansion vessel 30, it be disposed in fuel tank 1 near, and its evaporating space is connected with fuel tank 1 by a conduit weak point, that be provided with valve 31.On expansion vessel 30, derive a conduit with expansion valve 18.A kerve guiding delivery pump 14 that has the conduit of valve 32 from expansion vessel 30.
In this form of implementation, in transformer 1 expansion vessel 30 preposition, that have expansion valve 18, evaporate.Steam is by valve 31 input transformers 1.The composition that is not evaporated, play the thermal store effect is separated out and is transported in the solvent closed circuit by valve 32.This has its advantage, can be after heating process or intermittently in, for example in the middle of between pressure reducing period or separate the oil that takes out later on again.
Expansion valve on oil tank of transformer 1 18 is closed for this reason, and expansion valve 18 on expansion vessel 30 and valve 31 and 32 are opened.The part of the solvent vapour that forms is by also discharging condensation heat there in the valve 31 inflow transformer fuel tanks 1.Other most of condenser 3 that arrives also is condensed there.Be condensed neat solvent, flow in the collection container 5 and be discharged into when needed in the container 24 as kerosene.
Make the solvent/oil mixture that is in the circulation carry dense (Aufkonzentration) in this way, up to temperature in transformer 1 and condenser 3 and pressure dependence till the residual concentration corresponding to the solvent in the oil.Carried largely in the container 24 that dense oil is pumped into connection.
Fig. 3 represents another form of implementation, and wherein expansion vessel 30 as shown in Figure 2 is set on the another location, i.e. the top of fuel tank 1.A conduit that has valve 31 feeds condenser 3 from its evaporating space guiding fuel tank 1 and by valve 34.A conduit that has valve 33 is from the kerve guiding fuel tank 1 of expansion vessel 30 in addition.
For distilling off solvent composition from mixture better, considered that according to Fig. 3 expansion vessel 30 is set on the oil tank of transformer 1.Part solvent passes through valve 33 with non-steam form input transformer 2 by valve 31 with steam form and another part when heating thus, and this just is used for improving simultaneously the flushing of transformer inside.
Can be transported to the solvent closed circuit and the direct connection by valve 34 of the steam that forms is transported to condenser 3 in expansion vessel 30 by valve 32 finishing the heating unevaporated backflow in back.By owing to be connected the pressure that makes in the system's (expansion vessel 30 and condenser 3) that carries steam with condenser 3 direct and significantly reduce, just can with the dissolution solvent of little residue value be improved significantly carry dense.
Fig. 4 represents the form of implementation similar to Fig. 3.In Fig. 4, the kerve of expansion vessel 30 is connected to thin layer evaporator 40 by valve 41 and pressure disabler 42.The latter's kerve is connected to a valve 32.Conduit with valve 47 and 45 is connected to a valve 34 of condenser 3 fronts from its upper end, and wherein Zhi Guanyong valves 46 in the middle of valve 34 and 45 are connected to the vaporization chamber or the cap relief valve 31 of expansion vessel 30.In order to heat hot partly branch out the conduit with valve 43 and 44 of thin layer evaporator 40 from the solvent closed circuit.Its flow can be controlled with valve 48.
Can reach the further improvement of distillation characteristic in this wise by form of implementation shown in Figure 4, promptly flow out from expansion vessel 30, to carry dense mixture be not to be transported to valve 33, but be transported to rearmounted thin layer evaporator 40 by valve 41 and pressure disabler 42, this thin layer evaporator can directly form with condenser 3 through valve 47,45 and 34 by connecting duct and be connected.By no matter being in 1.1 neutralization or the circulations of the solvent/oil mixture that comprises in storage container 24 of transformer kerve, separated from solvent arrives as far as possible little residue content in the mixture with making.
Also can reach further improvement, at this moment thin layer evaporator 40 heats by the path with valve 43 and 44 by heated stream just in heat exchanger 16.
Also can reach another and improve, at this moment thin layer evaporator 40 by shown in Figure 7, have separately the second heat cycles loop of heat carrier liquid and heat.
Also can use transfer valve 73 to replace pressure disabler 42 by the gravity effect with valve 74.In the mobile unit part pump 73 both can be set thus and also thin layer evaporator 40 can be set, this just can reduce the setting up cost of the process of reorganizing and outfit greatly.
Form of implementation shown in Figure 5 is similar to form of implementation shown in Figure 1 very much, collects or intermediate receptacle 52 but wherein be provided with a delivery pump 50 and control valve 51 and one in drain valve 12 back of fuel tank kerve 1.1.Conduit is from the kerve guiding delivery pump 14 of collection container 52.Be provided with the bypass manifold of a band valve 53 in addition, its bypass delivery pump 14.
Suitable in this respect is can be transported to the collection container 52 that is provided with higherly at device side by transformer 1 by installing not only easy but also simple conveying device by valve 12 solvents that flow out, band oil sometimes.From this collection container, use the described drum pump of this method again, be input in the expansion valve 18 by filter 15 and heat exchanger 16.Can use known delivery pump for this task, as liquid ring vaccum pump, piston pump or membrane pump, but their no problem ground not only transmits liquid, gas but also can transmit steam and these mixture of ingredients.
Fig. 6 represents another form of implementation, has wherein provided a particularly advantageous flexible program that is used to reclaim the heat carrier solvent.This flexible program also is similar to scheme shown in Figure 1, but it has added a thin layer evaporator 60.Its head-end chamber is connected with the heat part of solvent closed circuit by valve 64.Conduit directly leads to the conduit that 3, one of condensers have a blocking valve 63 by this head-end chamber and leads to current drainage part 12 or delivery pump 14 by its kerve.Valve 61 and 62 thermal powers of regulating thin layer evaporator 60; Second heat exchanger 65 (shown in dotted portion) can be set on heater 17.
In this form of implementation, solvent/oil mixture heats in fuel tank 1 and finishes the back and be transported to thin layer evaporator 60 after the intermediate pressure decline of sealing finishes to be used for distillation, rather than delivers to expansion valve 18.This thin layer evaporator 60 can be arranged in the movable part of this equipment, remove in the basic form of implementation shown in Figure 1 thus in parts 16 and 18, outside the connection that has illustrated between 12 and 14 and 1 and 7 or 1 and 4, flexibly connecting between transformer 1 and this equipment without any need for other.
The ground that meets the requirements heats by a heat carrier closed circuit with heat exchanger 65, and this heat exchanger 65 can be heated by heater 17.The steam that forms in thin layer evaporator 60 will directly be fed to condenser 3.Isolated oil is fed to container 24.Advantageously, can reach the splendid solvent recovery and the result of transformer oil separation with very little preparation and installation cost.
The flexible program shown in Figure 7 also scheme with shown in Figure 1 is similar.But additionally be provided with a thin layer evaporator 70 in the solvent closed circuit, it can be connected by valve 71 and 72.A tubulature that has valve 31 imports the fuel tank 1 from its head end.It is heated by two conduits of heat exchanger 65.
By the flexible program shown in Fig. 1 to 6 evaporation of expanding has been used in the heating of transformer 1 in fact.Separate or solvent recovery for oil, partly used the device of direct evaporation.But the scheme shown in Fig. 7 also can: other or light-duty, a compact thin layer evaporator 70 is set above it at oil tank of transformer 1.This evaporimeter can be used as commercial general plate-type evaporator or similar device is implemented.The liquid that its input had both been separated heat energy as solvent also conduct.
Advantageously, the solvents of a large amount of thus inputs are directly evaporated and a spot of solvent must be recycled.Therefore realized as disclosed good heating of DE 196 37 313 C2 and separating resulting.
Claims (15)
1. the condensation heat that is used for utilizing in a vacuum a kind of heating liquid evaporation heats and dry equipment the parts (2) that have the hygroscopicity electric insulation of doing based on fibrous material or plastics, wherein parts (2) between the period of heating the second higher liquid of at least a boiling point separated out, this equipment has a container, a vavuum pump (10), at least one condenser (3,8) and a heat exchanger (16) that is used for heating liquid, it is characterized in that: heat exchanger (16) keeps liquid ground that heating liquid is heated, and on a container or just be evaporated in the container, and/or evaporate at the expansion vessel (30) or the evaporimeter (70) that directly are contained on the container.
2. equipment according to claim 1 is characterized in that: this equipment is configured portable, and the fuel tank (1) that uses transformer to be heated is as described container.
3. equipment according to claim 1 and 2 is characterized in that: between heat exchanger (16) and the expansion valve (18), between drain valve (12) and the delivery pump and the connection between container and the one or more blocking valve (4,7) be detachable.
4. equipment according to claim 1 and 2 is characterized in that: have a detachable exchanging container that is used for heating liquid.
5. equipment according to claim 1 and 2 is characterized in that: be provided with the fluffy or portable additional heater of portable heat-barrier material, thermal insulation board, heat insulating mattress, wall unit, single wall or double-walled resistance to compression.
6. equipment according to claim 1 and 2 is characterized in that: be provided with a tubulature by the heating liquid that is used to be evaporated and be installed in expansion vessel (30) on the container, this expansion vessel has a return-flow catheter that is used for unevaporated heating liquid.
7. equipment according to claim 1 and 2, it is characterized in that: the expansion vessel (30) that is located on the container has a tubulature of linking the heating liquid that is used to be evaporated of container, have the return-flow catheter that one or two is used for unevaporated heating liquid, and have an input pipe that is used for steam of linking condenser (3).
8. equipment according to claim 1 and 2 is characterized in that: expansion vessel (30) have one can be through-flow double casing.
9. equipment according to claim 1 and 2 is characterized in that: use solvent and/or kerosene as heating liquid.
10. equipment according to claim 1 and 2, it is characterized in that: the composition of having been assembled that is flowed out by expansion vessel (30) is transported to a rearmounted thin layer evaporator (40) that is used for the separation of solvent residue by valve (41) and pressure disabler (42) by gravity, and the steam that it forms when pressure descends directly is transported to condenser by valve (45).
11. equipment according to claim 1 and 2 is characterized in that: pressure disabler (42) is made of delivery pump (73) and a threshold switch, and finisher (40) is installed in this mobile unit.
12. equipment according to claim 1 and 2 is characterized in that: the available vibration kestner long-tube evaporator (40 of expansion vessel (30); 60) and/or plate-type evaporator replace, they are preferably heated by heat exchanger (16).
13. equipment according to claim 1 and 2, it is characterized in that: have a delivery pump (50) that is designed for little injecting height, and has an intermediate receptacle (52) that is used for the hot liquid that flows out from container, this intermediate receptacle continues heating liquid is transported to heat exchanger (16) and/or evaporimeter (40 with rearmounted drum pump, 60,70).
14. equipment according to claim 1 and 2, it is characterized in that: thin layer evaporator (60) has the input pipe and the discharge tube that leads to exchanging container (24) that lead to condenser (3), wherein the heat exchange medium that separates of thin layer evaporator (60) or origin automatic heat-exchanger (65) heating or by heat exchanger (16) heating of heating liquid.
15. equipment according to claim 1 and 2 is characterized in that: be provided with light-duty, a compact thin layer evaporator (70), this evaporimeter directly is fixed on the container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02106602 CN1262326C (en) | 2002-02-28 | 2002-02-28 | Preparing device for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02106602 CN1262326C (en) | 2002-02-28 | 2002-02-28 | Preparing device for transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1440827A CN1440827A (en) | 2003-09-10 |
| CN1262326C true CN1262326C (en) | 2006-07-05 |
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ID=27768491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02106602 Expired - Lifetime CN1262326C (en) | 2002-02-28 | 2002-02-28 | Preparing device for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1262326C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119170A (en) * | 2013-11-15 | 2015-12-02 | 国网山东省电力公司青岛供电公司 | Transformer oil transfer system using vacuum pump to vacuumize |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005006270B3 (en) * | 2005-02-10 | 2006-06-01 | Wilhelm Hedrich Vakuumanlagen Gmbh & Co. Kg | Hygroscopic, electrically-insulated component e.g. transformer, heating and drying device, has storage tank provided at height of vacuum chamber, and pump mechanism provided between chamber and tank and having inlet provided below chamber |
| CN102054577B (en) * | 2009-10-30 | 2014-04-30 | 特变电工衡阳变压器有限公司 | System and method for realizing kerosene vapor-phase drying to on-site assembly transformer |
| WO2011050577A1 (en) * | 2009-10-30 | 2011-05-05 | 特变电工衡阳变压器有限公司 | System and method for realizing kerosene gas phase drying to transformers assembled on-site |
| CN102194564B (en) * | 2010-03-09 | 2013-04-24 | 华北电力科学研究院有限责任公司 | System and method for drying transformer body |
| CN106680297A (en) * | 2017-03-09 | 2017-05-17 | 重庆大学 | Method for observing dispersion staining images of fibers in transformer oil |
| CN107808771B (en) * | 2017-12-01 | 2020-05-19 | 国网浙江省电力有限公司 | High-voltage test transformer insulation heat treatment system and heat treatment method thereof |
| CN111243834B (en) * | 2020-04-08 | 2024-05-10 | 国网福建省电力有限公司南平供电公司 | Heat storage drying device and method for transformer main body moisture absorber |
| CN111829299B (en) * | 2020-07-14 | 2023-10-27 | 沈阳诚桥真空设备有限公司 | Solvent spray vapor phase drying method, equipment and system |
-
2002
- 2002-02-28 CN CN 02106602 patent/CN1262326C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119170A (en) * | 2013-11-15 | 2015-12-02 | 国网山东省电力公司青岛供电公司 | Transformer oil transfer system using vacuum pump to vacuumize |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1440827A (en) | 2003-09-10 |
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