JPH06349644A - Heating method of still induction equipment winding - Google Patents

Abstract

PURPOSE:To avoid the freezing of working fluid in capillary heat pipes in the case of stopping operation in transit etc. CONSTITUTION:A winding main body is composed of a non-looped capillary heat pipe 31 wherein a working fluid comprising a non-antifreezing solution such as water is sealed up in hollow tubular capillary containers 13, 14. Next, a transformer winding composed so that the heat from said heat pipe 31 may be radiated through the intermediary of a looped capillary heat pipe 32 is to be heated by feeding the winding main body with power in the case of stopping operation in transit etc., or heating the heat radiating part of the looped capillary heat pipe 32 so that the temperatures in the capillary heat pipes 31, 32 may not decline to the level not exceeding the freezing temperature of the working fluid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding of a static induction device in which a winding body is constituted by a thin tube heat pipe in which a working fluid consisting of an antifreeze liquid such as water is enclosed in a hollow tubular thin tube container. Regarding the warming method.

[0002]

2. Description of the Related Art In recent years, in response to an increase in the demand for electric power in urban areas, electric power equipment is often installed in urban areas. Of these types of power equipment, static induction equipment installed in buildings and underground malls, especially large equipment such as transformers, is required to have flame retardancy, and as a result, it is used as an insulating medium for transformers. In addition, conventional flammable mineral oils are being replaced with non-flammable gases and flame-retardant epoxy resins, and further research is being conducted on the application of solid-liquid intermediate materials such as silicone gel.

However, when these insulating media are used, the cooling performance is lower than that of the conventional oil-filled transformer that cools the device body by convectively circulating a liquid insulating and cooling medium. Therefore, it is necessary to take measures such as reducing the current density of the windings, which tends to increase the size and weight of the device.

On the other hand, in an urban area, land price is high and the transformer is installed in a place where the carry-in restrictions are severe, so downsizing and weight reduction of the transformer are the top priorities. It is strongly desired to improve the cooling performance of the.

As a method for solving such a problem, many proposals regarding the use of a heat pipe have been made in the past. However, since there are various problems as described below, all of them are limited to a small capacity transformer or the like. The current situation is that it has been put to practical use only under the specified conditions.

(1) In order to uniformly cool the inside of the winding to a desired temperature, it is necessary to insert a large number of heat pipes.
On the other hand, in order to insert a large number of heat pipes without enlarging the size of the equipment, it is necessary to make the heat pipes thin. For example, in the case of a heat pipe with an outer diameter of about 3 mm, the heat dissipation part is about 500 mm. Is the operational limit,
It was difficult to make it longer than that.

(2) Further, when the heat pipe as described above is used, the heat transfer amount per wire is about 10 W, which is sufficient to cool the large transformer winding. It was very difficult to get.

(3) Further, when the heat pipe is inserted into the transformer winding, it is necessary to bend the heat pipe along the winding shape. However, this bending significantly reduces the heat transport capacity. There was a drawback that it would end up.

(4) Further, when the heat pipe is inserted into the transformer winding, it is necessary to operate in the top heat posture depending on the insertion position. In this top heat posture, the heat transport ability is significantly increased. There was a drawback that it would decrease.

By the way, recently, a loop type thin pipe heat pipe has been developed as a new type heat pipe that overcomes the above-mentioned drawbacks of the conventional heat pipe, and it is used as a cooling means for the transformer winding ( 64-6499
No. "Structure of electromagnetic equipment") has been proposed.

FIG. 34 shows the structure of the loop type thin tube heat pipe used in the above proposal. That is, the thin tube container 2 in which the working fluid is sealed is formed in a meandering shape to form a heat receiving portion 2-H (heat receiving portion group H) and a heat radiating portion 2-C (heat radiating portion group C).
In the thin tube container 2, the working liquid in which the liquid portion 4 and the gas portion 5 are distributed is strongly circulated in a predetermined direction by the circulation direction restricting means 3 in which a loop-shaped endless flow path having alternating flow paths is formed. In addition, the structure is such that heat is transported while repeating evaporation and condensation. According to this loop-type thin tube heat pipe, not only can an outer diameter of about 2 mm be made thin, but also its length can be lengthened without any limitation. Also exhibits heat transfer characteristics that are almost the same as when used in the bottom heat posture. And when applying this loop type thin pipe heat pipe as a cooling means of a transformer winding, it is proposed by the following structures.

The loop type thin tube heat pipe is composed of a loop in which a thin tube container is meandered, and a group of predetermined portions of its turn is mounted as a heat receiving portion group on a predetermined temperature rising portion of equipment such as a transformer. As shown in FIG. 35, the mounting state is such that the heat receiving portion 2-H of the loop type thin pipe heat pipe is wound around the winding 1
36, or the heat receiving part 2-H of the loop type thin pipe heat pipe itself is used also as a winding conductor, as shown in FIG. Of any of the above-mentioned configurations or a combination of these configurations. In addition, 6 is an iron core, and the remaining group of each turn of the loop type thin tube heat pipe is configured as a heat radiating portion of a predetermined heat radiating structure.

[0013]

However, in the above conventional structure, since the non-antifreezing liquid such as water (for example, pure water) is used as the working liquid of the loop type thin pipe heat pipe,
When the ambient temperature drops to 0 ° C. or less during the operation stop such as when transporting the stationary induction device winding, the working fluid in the thin tube heat pipe freezes and the thin tube heat pipe is damaged. It was In addition to the above-mentioned transportation, the working fluid may freeze when the hydraulic fluid is not energized while installed in a substation, or when the energization is stopped for inspection.

Therefore, an object of the present invention is to prevent the working fluid in the thin tube heat pipe from being frozen when the operation is stopped during transportation and to reliably prevent breakage of the thin tube heat pipe. To provide a heating method.

[0015]

A method for heating a winding of a static induction device according to the present invention comprises a thin tube heat pipe in which a working fluid consisting of a non-antifreeze liquid such as water is enclosed in a hollow tubular thin tube container. For the static induction device winding that consists of
When the operation is stopped during transportation, the winding body is energized so that the temperature of the thin tube heat pipe is heated so as not to drop below the freezing temperature of the working fluid. In this case, the power supply for energizing the winding body may be composed of a generator, a solar cell, a fuel cell, a lithium battery, a storage battery, or the like.

Further, the winding body is constructed of a non-loop type thin tube heat pipe in which a working fluid is enclosed in a hollow tubular capillary tube container, while the working fluid is enclosed in a hollow tubular capillary tube container to have a predetermined shape. The predetermined portion of the loop type thin tube heat pipe formed in the loop of the above is closely contacted with the predetermined portion of the non-loop type thin tube heat pipe to form a heat receiving portion, and the remaining predetermined portion of the loop type thin tube heat pipe is looped thin tube heat pipe. With respect to the stationary induction device winding, which serves as a heat radiating portion of the pipe, the temperature of the thin tube heat pipe becomes equal to or lower than the freezing temperature of the working fluid by heating the heat radiating portion by a heating means when the operation is stopped during transportation. It is also preferable to heat so as not to decrease.

Further, the winding body is constituted by a non-loop type thin tube heat pipe in which a working fluid is enclosed in a hollow tubular thin tube container, and a cooling medium is enclosed in a predetermined portion of the non-loop type thin tube heat pipe. When a predetermined portion of the cooling pipe is brought into close contact with the rest of the cooling pipe and an external heat exchanger and a circulation pump are connected to the stationary induction device winding, the external heat is removed when the operation is stopped such as during transportation. It is also preferable to heat the exchanger by heating means so that the temperature of the non-loop type thin tube heat pipe does not drop below the freezing temperature of the working fluid.

In this case, in addition to heating the heat radiating section or the external heat exchanger by heating means, it is conceivable to heat the winding body by energizing it.
Furthermore, the heating means may be a means for generating heat by an exothermic reaction such as oxidation, an electric heater, or an engine of a transportation vehicle that transports the stationary induction device winding. It may be a means that diverts the heat used.

[0019]

According to the above means, when the operation is stopped during transportation,
By heating the winding body by energizing it,
Since the temperature of the thin heat pipe is configured not to drop below the freezing temperature of the working fluid consisting of non-antifreeze liquid such as water, the ambient temperature may drop below 0 ° C when the operation is stopped during transportation. Also, the working fluid in the thin tube heat pipe is prevented from freezing, and damage to the thin tube heat pipe is prevented.

Further, while the winding body is constituted by the non-loop type thin tube heat pipe, the predetermined portion of the loop type thin tube heat pipe formed by forming a loop in a predetermined shape by enclosing the working fluid in the hollow tubular thin tube container is formed. A heat receiving part is formed by closely contacting with a predetermined part of the non-loop type thin tube heat pipe,
For stationary induction equipment windings that use the remaining predetermined part of this loop type thin tube heat pipe as the heat radiation part of the loop type thin tube heat pipe, heat the heat radiation part of the loop type thin tube heat pipe when the operation is stopped such as during transportation. With the configuration in which heating is performed by heating by the means, it is possible to prevent the working fluid in the thin tube heat pipe from freezing, and to prevent damage to the thin tube heat pipe.

Further, while the winding main body is constituted by the non-loop type thin tube heat pipe, the predetermined portion of the cooling pipe in which the cooling medium is sealed is brought into close contact with the predetermined portion of the non-loop type thin tube heat pipe. For stationary induction device windings in which an external heat exchanger and a circulation pump are connected to the remaining predetermined portion, if the external heat exchanger is heated by heating means when the operation is stopped such as during transportation. good. In addition to the heating by the heating means, the same effect can be obtained by energizing the winding body.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a transformer will be described below with reference to FIGS.
The transformer is usually composed of two windings, a low-voltage winding and a high-voltage winding, but in the following description, an example of one winding will be described as a representative.

FIG. 1 is a perspective view showing the overall structure of the cylindrical winding, and FIG. 2 is a partial sectional view of the same. These FIG. 1 and FIG.
As shown in FIG. 1, a thin tube container 13 formed as an electrically insulated conductor in the form of a hollow tube is placed on the insulating tube 10 and the winding start portion 1
The winding body is formed by concentrically winding from 3a to the winding end portion 13b. In this example, the winding body is composed of a total of 5 layers from the innermost side to the outermost side, and each time one layer is wound up, another hollow tubular capillary tube container 14 is provided at both ends thereof.
And the end support member 11 is attached to the outer side in the axial direction. Such winding layers are sequentially
Form up to layers. A predetermined gap may be provided between the layers by inserting the spacing piece 12 for the purpose of improving insulation or cooling.

Then, the winding start portion 13 of the thin tube container 13
The winding body itself is configured as a non-loop type thin tube heat pipe 31 by enclosing a predetermined amount of hydraulic fluid from a or the winding end portion 13b, and a lead conductor (not shown) is connected. Pure water or a fluorinated liquid is usually used as the working liquid. In this case, the hydraulic fluid is a non-antifreeze liquid such as water,
When the ambient temperature drops below 0 ° C, it freezes.

On the other hand, the thin tube container 14 is connected to form a loop with a predetermined heat dissipating structure (not shown), for example, a hollow tubular thin tube container which is formed in a meandering shape and is arranged outside the transformer container, and then a predetermined amount of operation is performed. The liquid is sealed to form the loop type thin tube heat pipe 32.

The cross-sectional shape of the thin tube containers 13 and 14 is, for example, as shown in FIGS. 3 (a) and 3 (b), and is a round shape having low electric resistance and high thermal conductivity, such as copper or aluminum. Alternatively, an insulating layer 17 made of a material having high thermal conductivity is provided on the rectangular hollow conductor 15 or 16. The hollow tubular capillaries 13 and 14 are mounted in such a manner that the wedge portion of the joint is coated with a heat conductive grease or resin 18 as shown in FIGS. 4 (a) to 4 (c), for example. To do.

When there is a risk that the ambient temperature will drop to 0 ° C. or lower when the transformer winding having such a structure is transported or the like is stopped, it is necessary to heat the transformer winding. is there. In such a case, as shown in FIG. 1, the output terminals 61a and 61b of the external power supply 61 are connected to the thin tube container 1.
By connecting the winding start portion 13a and the winding end portion 13b of No. 3 and energizing the thin tube container 13, that is, the winding main body, the temperature of the non-loop type thin tube heat pipe 31 and the loop type thin tube heat pipe 32 becomes Warm so that the temperature does not drop below the freezing temperature. As a result, the thin tube heat pipe 3
Since the temperature of the working fluid in 1 and 32 does not drop below the freezing temperature, it is possible to reliably prevent the working fluid from freezing and damaging the thin tube heat pipes 31 and 32.

In this case, the external power supply 61 may be either a DC power supply or an AC power supply (sine wave or distorted wave), or may be a power supply in which AC is superimposed on DC. When an AC power supply is used, its frequency is preferably about tens of Hz, and the applied voltage is preferably about tens of volts or 100V.
Specifically, for example, when heating a transformer having a capacity of 1500 KVA, it is assumed that a 100 ° C. rise design is performed on a winding of class H insulation at a load factor of 100%. In this case, although it depends on the leakage impedance value, about 20 A is required when supplying an AC voltage of 100 V to generate heat of about 15 ° C., and 2 KVA per winding of the transformer.
Power supply is required. Therefore, when the transformer is transported by a truck or the like, it is necessary to mount a generator (small generator with an engine) having a power generation capacity of 2 KVA on the truck. The engine of the small generator with an engine uses gasoline, light oil, or the like as fuel. When the winding has three phases (three circuits), it is necessary to use a generator having a power generation capacity of 6 KVA. In this case, when there is only a single-phase generator, the power may be switched and supplied to the U-phase, V-phase, and W-phase every fixed time, for example, every 30 minutes.

The temperature of the surface of the winding body is measured by a radiation type thermometer or a contact type surface thermometer. In this case, the winding may be automatically controlled so that the detected temperature is maintained within the set temperature range based on the temperature detection signal output from the thermometer. With this configuration,
Unattended heating of the windings and lowering the temperature of the transformer below the freezing temperature of the working fluid even when unattended at night when the transformer installed in the substation is not energized Can be reliably prevented.

By the way, there are the following two conditions for effectively operating the loop type thin pipe heat pipe having the conventional structure (see FIGS. 35 and 36).

(B) It is necessary to distribute the heat receiving portion and the heat radiating portion in an appropriate ratio in the loop type thin pipe heat pipe with respect to a desired heat transport amount.

(B) The loop type thin tube heat pipe requires the circulation direction regulating means (valve body) 3.

That is, in any of the configurations shown in FIGS. 35 and 36, if the heat receiving portion 2-H at one location becomes too long, that portion will not operate normally and overheating will occur. Therefore, the larger the capacity of the winding, the more the number of heat dissipation portions to be drawn out from the middle of the winding. Therefore, in the case of considering a generally-used method for manufacturing a winding in which a conductor is continuously wound by rotating a winding core, there is a problem that the manufacturing efficiency is significantly reduced. Further, it is necessary to mount a plurality of valve bodies 3 in one loop, and
Therefore, the work efficiency for the installation is reduced, and thus, the manufacturing efficiency is reduced similarly to the above.

On the other hand, in the seminar held in '91 -3-15 entitled "Recent heat pipe application technology", "loop type thin pipe heat pipe without valve", "non-heat pipe" was newly added. Loop type thin pipe heat pipe "is introduced. Here, the “loop type thin tube heat pipe without using a valve element” has a structure as shown in FIG. 37, and transports heat by axial vibration of the working fluid and a gentle circulating flow. Since this loop type thin tube heat pipe does not have a circulation direction regulating means (valve body), it basically becomes difficult to operate in the top heat posture.

As shown in FIG. 38, the "non-loop type thin tube heat pipe" is a thin tube container 2 in which the working fluid is sealed and sealed at both ends. The group of loops is configured as the heat receiving section group H, and the other loop group is configured as the heat radiation section group C. And FIG.
As shown in, heat is transported in the direction of arrow 9 only by the axial vibration (arrow 8) of the working liquid generated by evaporation / condensation of the working liquid by nucleate boiling 7. This non-loop type thin tube heat pipe has a structure in which an appropriate amount of working fluid is simply sealed in the thin tube container 2 and has no connecting portion for forming a loop, so that the installation work at the time of application is easy. , The heat transport capacity is inferior.

As described above, "loop type thin tube heat pipe without valve body" and "non-loop type thin tube heat pipe"
Both are inferior in characteristics to the loop type thin tube heat pipe with a valve element, and do not solve the above problem (a).

On the other hand, according to the above-described first embodiment, since the thin tube container 13 constituting the non-loop type thin tube heat pipe 31 is used in forming the winding main body, it is a usual case. The winding work can be performed in the same manner as the winding conductor, there is no need to form a loop in the thin tube container 13, and it is not necessary to pull out the conductor from the middle of the winding body to form the heat dissipation portion. Since there is no need to attach a valve body, the manufacturing efficiency can be maintained which is no different from the conventional winding process. Moreover, there is no problem in terms of insulation between the winding of the thin tube container 13 and the presence of the insulating layer 17.

On the other hand, in the thin tube container 13 of the non-loop type thin tube heat pipe 31 which constitutes the winding body, it is necessary to disperse and dissipate the heat radiating portions appropriately, but these heat radiating portions are manufactured separately. The thin tube containers 14 of the loop thin tube heat pipe 32 can be dispersed and provided by being closely attached. This closely attached portion also serves as a heat receiving portion of the loop type thin tube heat pipe 32.

Therefore, the heat generated in the winding body due to the energization is first caused by the operation of the non-loop type thin tube heat pipe 31, that is, the axial vibration of the working liquid enclosed in the thin tube container 13 to radiate the heat (the loop type thin tube). It is transported toward the heat receiving part of the heat pipe 32). And thin tube container 1
Since heat conductive grease or resin is applied to the joints of 3 and 14 so that they are in close contact with each other, the heat resistance at the joints is minimized and the heat is conducted. (2), that is, due to the axial vibration and circulating flow of the working fluid enclosed in the thin tube container 14, it is transported to the outside of the winding body and radiated to the outside through a predetermined heat radiating portion.

As described above, since the cooling system directly collects heat from the winding body and dissipates the heat from the heat collecting section to the outside, excellent cooling performance can be obtained even when gas insulation or solid insulation is applied. To be Also, heat can be directly dissipated to the outside via a heat pipe with extremely small thermal resistance, and since the winding body itself is composed of a heat pipe, the internal temperature distribution can be made uniform compared to conventional windings. The winding body can be made compact and lightweight.

In the above embodiment, the thin tube container 14 constituting the loop type thin tube heat pipe 32 is set to the ground potential for connecting to the external heat radiating portion, whereas the non-loop type thin tube heat forming the winding body is formed. Since the thin tube container 13 of the pipe 31 has an electric potential according to the winding conductor, the voltage sharing of the closely-attached parts of both becomes large. Therefore, when applied to high-voltage equipment, a round or square hollow pipe made of an insulating material having excellent thermal conductivity, preferably flexible, for example, a highly airtight resin, is partially or Try to use it for everything.

Next, as a method for heating the winding body, a method which replaces the above-described energization method will be described. For example, when transporting a transformer by a truck, heat (exhaust heat) generated from the engine of the truck can be used to heat the winding body. Specifically, it may be configured so that the warm air heated by the engine is guided to the platform and applied to the transformer. In this case, when hot air is applied to the heat radiating portion of the loop-type thin tube heat pipe 32 of the winding to heat the heat radiating portion, the applied heat causes the working fluid in the loop-type thin tube heat pipe 32 to loop-type the heat. It is transmitted to the heat receiving part of the thin tube heat pipe 32,
The heat is transferred from the heat receiving portion to the non-loop type thin tube heat pipe 31. As a result, even if the ambient temperature of the transformer drops to 0 ° C. or lower, the temperature of the working fluid in the non-loop thin tube heat pipe 31 and the loop thin tube heat pipe 32 does not drop to the freezing temperature or lower, and the operation is performed. The liquid will not freeze.

Further, as described above, when the heat radiating portion of the loop type thin pipe heat pipe 32 is heated by warm air, if the output of this heating is small, in addition to the heating, the winding body is energized. It may be configured to. In this case, it is possible to use a generator having a small power generation capacity (capacity) as a power generator for supplying power to the winding body. As a power source, instead of a generator, a solar cell, a fuel cell,
A configuration using a lithium battery or a storage battery may be used.

In the above structure, exhaust gas (gas containing active gas such as CO, NOx, SOx) in hot air is used.
Must be prevented from being mixed. This is to prevent the deterioration of the metal and the insulator that make up the transformer.

Further, instead of heating the heat radiating portion of the loop type thin pipe heat pipe 32 with warm air, it may be heated by other heating means. Specifically, a so-called disposable pocket furnace, that is, a bag in which iron powder, water, wood powder, activated carbon, and salts are mixed may be heated. In this case, by opening the bag, air is introduced into the bag to oxidize the contaminants, and the heat generated by the exothermic reaction heats the heat radiating portion of the loop thin tube heat pipe 32. At this time, it is preferable that the bag is attached and fixed in close contact with the heat radiating portion of the loop thin tube heat pipe 32.

Further, as the heating means, an electric heater, for example, a space heater may be used instead of the above-mentioned disposable pocket furnace. In this case, the space heater may be electrically driven by an external power source. .

When the winding body is heated as described above (when operation is stopped during transportation, etc.), the entire transformer is covered with a heat insulating material to keep the heat, so that the thin tube heat pipes 31, 32 are heated.
It is desirable to prevent the temperature of the hydraulic fluid inside from decreasing. By keeping the temperature in this way, the amount of heat for heating the winding body can be saved, and the freezing of the hydraulic fluid can be prevented more reliably.

FIGS. 5 and 6 show the second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and different points will be described. In the second embodiment, as shown in FIGS. 5 and 6, the thin tube containers 14 forming the loop thin tube heat pipe 32 are closely attached to each layer or innermost surface and outermost surface of the winding body. It was done. According to such a configuration, the heat radiation portion is present in each turn of the thin tube container 13 of the non-loop type thin tube heat pipe 31 that constitutes the winding body, so that the temperature distribution inside the winding body is more uniform. Can be realized. Also, FIG.
And in FIG. 6, by increasing the number of thin tube containers 14 of the loop type thin tube heat pipe 32 inserted between the layers,
The amount of heat radiation can be set arbitrarily. The configuration other than the above is the same as that of the first embodiment.

7 and 8 show a third embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and different points will be described. In the third embodiment, as shown in FIGS. 7 and 8, a winding formed by stacking disk-shaped winding units having a predetermined number of layers in the vertical direction with a spacing piece 20 interposed therebetween. At the outermost peripheral portion of each layer, a thin tube container 14 forming a loop thin tube heat pipe 32
Is closely attached. The rest of the configuration is the same as that of the first embodiment.

According to this structure, since the thin tube container 14 can be mounted in a completely independent form after the winding body is formed, the assembling property is excellent, and the non-loop type thin tube heat pipe 31 constituting the winding body is excellent. Since the heat radiating portion can be provided for each small turn of the thin tube container 13, the temperature distribution inside the winding body can be made more uniform. Further, in the above-mentioned embodiment, the thin tube container 14 is mounted at one place in two layers, but it can be mounted at any ratio depending on the design conditions.

9 and 10 show a fourth embodiment of the present invention. The same parts as those of the third embodiment are designated by the same reference numerals and different points will be described. In the fourth embodiment, as shown in FIG. 9 and FIG. 10, the thin tube container 14 that forms the loop thin tube heat pipe 32 also serves as the spacing piece 20 at a predetermined position between the layers of the disk-shaped winding unit. Are closely attached. The other configuration is the same as the configuration of the third embodiment.

According to the fourth embodiment having such a configuration,
Since the heat dissipating portion can be present for each less turn of the thin tube container 13 of the non-loop type thin tube heat pipe 31 constituting the winding body, the temperature distribution inside the winding body can be made more uniform. In addition, the amount of heat radiation can be set arbitrarily by increasing the number of places where the thin tube container 14 is mounted between the layers.

A forced circulation cooling system may be adopted in place of the loop type thin pipe heat pipe 32 in each of the above embodiments. That is, the loop-type thin tube heat pipe 32
In place of the thin tube container 14 constituting the above, a metal or insulating cooling pipe in which a cooling medium such as pure water or a fluorinated liquid is enclosed is used. The non-loop type thin tube heat is provided by bringing the heat exchanger arranged outside the transformer into communication with the forced circulation pump in the remaining predetermined portion in close contact with the thin tube container 13, and by forcibly circulating the cooling medium in the cooling pipe. The heat of the winding body composed of the pipe 31 can be smoothly radiated to the outside. In the case of this configuration, as a method of heating the winding main body when the operation is stopped during transportation or the like, in the case of a method of heating by the heating means, the heat exchanger of the cooling pipe is configured to be heated by the heating means. Is preferred.

11 to 15 show the fifth embodiment of the present invention.
The same parts as those in the first embodiment are designated by the same reference numerals, and different points will be described. First, as shown in FIGS. 11 to 13, a plurality of, for example, two working fluid sealing passages 42, 4 are provided inside the thin tube container 41 of the non-loop type thin tube heat pipe 31 constituting the winding body.
2 are provided substantially in parallel. Each hydraulic fluid sealing passage 42,
A predetermined amount of a working fluid, such as pure water or a fluorine-containing liquid, is enclosed in 42. And the thin tube container 41 is
An insulating layer 17 is provided on the outer peripheral surface of the hollow conductor 16 having the two hydraulic fluid sealing passages 42, 42.

A cooling pipe 43 is provided in place of the thin tube container 14 of the loop type thin tube heat pipe 32. Since this cooling pipe 43 needs to be connected to a predetermined external heat exchanger (not shown) and usually has a ground potential, it is necessary to consider insulation. Above cooling pipe 4
No. 3 has a cross-sectional shape as shown in FIG. 14, and needs to be made of a material having good thermal conductivity and flexibility. In this case, the insulating property made of highly airtight resin 44 is used. The pipes are used in part or in whole.

An external heat exchanger and a refrigerant circulation pump (not shown) are connected to the cooling pipe 43 so as to form a loop. In this case, the cooling pipe 43
Is configured as a heat receiving portion of the refrigerant circulation heat exchanger system. As the circulating refrigerant sealed in the loop, that is, in the cooling pipe 43, an insulating liquid such as pure water or a fluorine-containing liquid is used. If such an insulating liquid is used, even if the refrigerant leaks, it does not hinder the insulation of the winding wire.

When closely fitting the thin pipe container 41 of the non-loop type thin pipe heat pipe 31 and the cooling pipe 43, as shown in FIG. 15, grease or resin 18 having good thermal conductivity is attached to the joint surface between them. It is desirable to adopt a coating structure. The configuration other than the above is the first
The configuration is the same as that of the above embodiment.

According to the configuration of the fifth embodiment, it is possible to obtain the same effect as that of the first embodiment. In particular, in the fifth embodiment, since the two working fluid sealing passages 42 are provided in the thin tube container 41, the heat transfer capacity of the non-loop type thin tube heat pipe 31 is only one working fluid sealing passage. It is almost twice as much as the one without. Therefore, since the heat transport capacity is increased, the current density in the winding can be increased accordingly. As a result, a conductor having a smaller cross-sectional area can be used with the same rating, and the winding structure can be made smaller accordingly.

In the fifth embodiment, the thin tube container 41 is used.
As shown in FIG.
However, the present invention is not limited to this, and may be configured as shown in FIG. 16 or FIG.
Further, three or more hydraulic fluid sealing passages 4 are provided in the thin tube container 41.
2 may be provided as shown in FIG. 18 or FIG.
In this case, the heat transport capacity of the thin tube container 41 is increased by the number of the hydraulic fluid sealing passages 42.

Here, since the size of the cross-sectional area of one hydraulic fluid enclosing passage 42 has almost no effect on the heat transport ability, in order to reduce the outer diameter of the conductor, the hydraulic fluid enclosing passage 4 is required.
It is preferable to set the cross-sectional area B per 1 of 2 so as to meet the condition of the following equation.

B <A / (n-1) However, A: cross-sectional area of the conductor including the working fluid sealing passage, n: number of the working fluid sealing passage. Further, the sectional shape of the cooling pipe 43 is shown in FIG. It may be configured in such a circular shape. In this case, when the cooling pipe 43 having a circular cross section and the thin tube container 41 having a rectangular cross section are closely attached, as shown in FIG.
The joint surface on the 3 side is slightly deformed so as to be closely attached via the resin 18.

When the thin tube containers 41 having a circular cross section are closely attached to each other, as shown in FIG. 22, the two are brought into contact with each other and the resin 1 is placed between the surfaces of the two close to each other.
It is filled up with 8 and made to adhere.

23 and 24 show a sixth embodiment of the present invention. The same parts as those of the fifth embodiment are designated by the same reference numerals and different points will be described. 23 and 24
As shown in FIG. 2, the two hydraulic fluid enclosing passages 45, which replace the two hydraulic fluid enclosing passages 42, are formed in a spiral shape that does not intersect each other, and each is a “non-loop type thin tube heat pipe”.

By the way, when a plurality of hydraulic fluid sealing passages are provided in parallel with each other, there is a temperature gradient between the hydraulic fluid sealing passage and a portion distant from the hydraulic fluid sealing passage (the portion indicated by the symbol A in FIG. 23). Occurs. This temperature gradient increases as the cross-sectional area of the thin tube container 41 increases and as the number of hydraulic fluid sealing passages decreases, thus pushing up the maximum temperature of the winding.

On the other hand, in the sixth embodiment, 2
Since the individual hydraulic fluid sealing passages 45 are formed in a spiral shape that does not intersect, the position distribution of the hydraulic fluid sealing passages 45 inside the thin tube container 41 becomes uniform, and the temperature gradient in the thin tube container 41 can be reduced. Therefore, the thin tube container 4
1, that is, the heat collection amount of the non-loop type thin tube heat pipe is increased, and more efficient heat transport can be performed. The configuration other than the above is the same as that of the fifth embodiment.

25 to 27 show a seventh embodiment of the present invention. The same parts as those of the fifth embodiment are designated by the same reference numerals and different points will be described. 25 and 2
As shown in FIG. 6, two working liquid sealing passages 46 are provided in parallel inside the thin tube container 41, and at both end portions (winding start portion and winding end portion) of the thin tube container 41. Is provided with a groove portion 47 that connects the two hydraulic fluid sealing passages 46 to communicate with each other. The other structure is the same as that of the fifth embodiment.

In this case, as shown in FIG. 27, after closing the groove 47 at one end of the thin tube container 41 with the lid member 48 and the brazing 49, the working fluid is injected into the working fluid sealing passage 46, Further, similarly to the configuration shown in FIG. 27, the groove 47 at the other end of the thin tube container 41 is sealed by the lid member 48 and the brazing 49, and thus the working fluid is sealed. As a result, the two hydraulic fluid sealing passages 46 are connected at both ends, and both hydraulic fluids can exchange with each other.
A loop-shaped hydraulic fluid sealing passage is formed. In this case, the thin tube container 41 constitutes a loop type thin tube heat pipe 50 that does not use a valve element. According to the loop type thin pipe heat pipe 50, heat is transported by the gentle circulation flow in addition to the axial vibration of the working fluid, so that the heat transport capability can be further improved.

28 to 30 show the eighth embodiment of the present invention. The same parts as those of the seventh embodiment are designated by the same reference numerals, and different points will be described. As shown in FIG. 28 to FIG. 30, four working fluid sealing passages 51 are provided in parallel inside the thin tube container 41, and both ends (winding start portion and winding end portion) of the thin tube container 41 are provided. In the end face portion of the above, two groove portions 52 are provided to connect two of the four hydraulic fluid enclosing passages 51 to each other so as to communicate with each other. In this case, FIG. 29 shows the end face on the left side in FIG. 28, and FIG. 30 shows the end face on the right side in FIG.

In the eighth embodiment, two loop-shaped hydraulic fluid sealing passages are formed by connecting two of the four hydraulic fluid sealing passages 51 to each other so as to communicate with each other. There is. In this case, the two loop-shaped hydraulic fluid sealing passages respectively constitute loop type thin pipe heat pipes that do not use a valve element. According to the seventh embodiment, since the two loop-shaped hydraulic fluid sealing passages are formed in the thin tube container 41, the heat transport capacity can be further improved. The configuration other than the above is the same as that of the seventh embodiment.

31 to 33 show the ninth embodiment of the present invention. The same parts as those of the eighth embodiment are designated by the same reference numerals, and different points will be described. As shown in FIGS. 31 to 33, four working fluid sealing passages 51 are provided in parallel inside the thin tube container 41. And
As shown in FIG. 32, at the end face portion of one end (the left side in FIG. 31) of the thin tube container 41, four hydraulic fluid sealing passages 51 are provided.
32, two groove portions 53 are provided to connect the two on the left side and the two on the right side in FIG. In addition, as shown in FIG. 33, the other end (the right side in FIG. 31) of the thin tube container 41 is provided with two of the four hydraulic fluid sealing passages 51 on the upper side and the lower side in FIG. Two groove portions 54 are provided for connecting the two and communicating with each other.

As a result, in the ninth embodiment, the four hydraulic fluid sealing passages 51 are continuously connected to one loop to form one long loop-shaped hydraulic fluid sealing passage. It is composed. In this case, the one long loop-shaped hydraulic fluid sealing passage constitutes a loop-type thin tube heat pipe that does not use a valve body. Therefore, also in the ninth embodiment, it is possible to obtain substantially the same operational effects as in the eighth embodiment. The configuration other than the above is the same as that of the eighth embodiment.

[0072]

As is apparent from the above description, the present invention heats the winding body by energizing the winding body when the operation is stopped such as during transportation, so that the temperature of the thin tube heat pipe is controlled. Since it is configured so as not to drop below the freezing temperature of the working fluid consisting of non-antifreeze liquid such as water, even if the ambient temperature may drop below 0 ° C when the operation is stopped during transportation,
This has an excellent effect that the working fluid in the thin tube heat pipe can be prevented from freezing and damage to the thin tube heat pipe can be reliably prevented.

In this case, in the case where the winding body is composed of the non-loop type thin pipe heat pipe and the heat from the non-loop type thin pipe heat pipe is radiated through the loop type thin pipe heat pipe, the loop type thin pipe heat pipe is used. If the heat radiating portion is heated by heating by the heating means, it is possible to prevent the working fluid in the thin tube heat pipe from freezing and to prevent the thin tube heat pipe from being damaged. Further, with this configuration, it is possible to efficiently dissipate heat by utilizing the characteristics of the thin tube heat pipe without impairing the winding workability, and also to realize downsizing and weight saving. Furthermore, in the case of a configuration in which the heat from the non-loop type thin tube heat pipe is radiated through the cooling pipe of the forced circulation cooling system, if the configuration is such that the external heat exchanger provided in the cooling pipe is heated by the heating means. In addition, it is possible to prevent the working fluid in the thin tube heat pipe from freezing, and prevent damage to the thin tube heat pipe.

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration of a cylindrical winding showing a first embodiment of the present invention.

FIG. 2 is a partial sectional view of a cylindrical winding.

3A and 3B are cross-sectional views of a thin tube container.

4A to 4C are cross-sectional views showing a close fitting state of a thin tube container of a non-loop type thin tube heat pipe and a thin tube container of a loop type thin tube heat pipe.

FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a view corresponding to FIG.

FIG. 7 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG.

FIG. 11 is a view corresponding to FIG. 1 showing a fifth embodiment of the present invention.

FIG. 12 is a view corresponding to FIG.

FIG. 13 is a sectional view of a thin tube container.

FIG. 14 is a sectional view of a cooling pipe.

FIG. 15 is a cross-sectional view showing a close fitting state of a thin tube container and a cooling pipe of a non-loop type thin tube heat pipe.

FIG. 16 is a cross-sectional view of different thin tube containers.

FIG. 17 is a cross-sectional view of different thin tube containers.

FIG. 18 is a cross-sectional view of different thin tube containers.

FIG. 19 is a cross-sectional view of different capillary containers.

FIG. 20 is a sectional view of a different cooling pipe.

FIG. 21 is a cross-sectional view showing a close fitting state of a thin pipe container of a non-loop type thin pipe heat pipe and a different cooling pipe.

FIG. 22 is a cross-sectional view showing a close fitting state of two thin tube containers of a non-loop type thin tube heat pipe.

FIG. 23 is a front view of the end portion of the thin tube container showing the sixth embodiment of the present invention.

FIG. 24 is a partial side view of the thin tube container.

FIG. 25 is a partial vertical sectional side view of a thin tube container showing a seventh embodiment of the present invention.

FIG. 26 is a front view of the end of the thin tube container.

FIG. 27 is a side view, partly in vertical section, of a thin tube container with a closed groove.

FIG. 28 is a vertical sectional side view of a thin tube container showing an eighth embodiment of the present invention.

FIG. 29 is a front view of one end of the thin tube container.

FIG. 30 is a front view of the other end of the thin tube container.

FIG. 31 is a vertical sectional side view of a thin tube container showing a ninth embodiment of the present invention.

FIG. 32 is a front view of one end of the thin tube container.

FIG. 33 is a front view of the other end of the thin tube container.

FIG. 34 is a view showing a conventional configuration and conceptually showing a configuration of a loop type thin tube heat pipe with a valve body.

FIG. 35 is a cross-sectional view showing a cooling structure of a transformer winding using a thin tube heat pipe.

FIG. 36 is a cross-sectional view showing another cooling structure for a transformer winding using a thin tube heat pipe.

FIG. 37 is a view conceptually showing the structure of a loop-type thin tube heat pipe without a check valve.

FIG. 38 is a diagram conceptually showing the structure of a non-loop type thin tube heat pipe.

FIG. 39 is a view conceptually showing an operating state of a non-loop type thin tube heat pipe.

[Explanation of symbols]

10 is an insulating tube, 13 is a thin tube container, 14 is a thin tube container, 31 is a non-loop type thin tube heat pipe, 32 is a loop type thin tube heat pipe, 41 is a thin tube container, 42 is a working fluid sealing passage, 43 is a cooling pipe, 44 Is resin, 45, 46
Is a hydraulic fluid sealing passage, 50 is a loop type thin pipe heat pipe, 5
Reference numeral 1 indicates a hydraulic fluid sealed passage, and 61 indicates an external power source.

Claims (8)

[Claims] 1. A stationary induction device winding comprising a winding body composed of a thin tube heat pipe in which a working fluid consisting of a non-antifreezing liquid such as water is enclosed in a hollow tubular thin tube container. When the operation is stopped, the winding body is energized so that the temperature of the thin tube heat pipe is warmed so as not to drop below the freezing temperature of the working fluid. . 2. The stationary induction device winding according to claim 2, wherein the power supply for energizing the winding body is composed of a generator, a solar cell, a fuel cell, a lithium battery, a storage battery, or the like. Heating method. 3. A non-loop type thin pipe heat pipe in which a working fluid is enclosed in a hollow tubular capillary container constitutes the winding body, and the working fluid is enclosed in a hollow tubular capillary container to have a predetermined shape. The predetermined portion of the loop type thin tube heat pipe formed in the loop of the above is closely contacted with the predetermined portion of the non-loop type thin tube heat pipe to form a heat receiving portion, and the remaining predetermined portion of the loop type thin tube heat pipe is looped thin tube heat pipe. With respect to the stationary induction device winding, which serves as the heat radiation part of the pipe, the temperature of the thin tube heat pipe becomes equal to or lower than the freezing temperature of the working fluid by heating the heat radiation part by heating means when the operation is stopped such as during transportation. A method for warming a winding of a static induction device, which comprises heating so as not to lower the temperature. 4. A non-loop type thin tube heat pipe in which a working fluid is enclosed in a hollow tubular thin tube container constitutes a winding body, and a cooling medium is enclosed in a predetermined portion of the non-loop type thin tube heat pipe. When a predetermined portion of the cooling pipe is brought into close contact with the rest of the cooling pipe and an external heat exchanger and a circulation pump are connected to the stationary induction device winding, the external heat is removed when the operation is stopped such as during transportation. A method for heating a stationary induction device winding, characterized in that the temperature of the non-loop type thin tube heat pipe is heated so as not to fall below the freezing temperature of the working fluid by heating the exchanger by a heating means. . 5. The temperature of the thin tube heat pipe is controlled by energizing the winding main body in addition to heating the heat radiating section or the external heat exchanger by a heating means when the operation is stopped during transportation or the like. The heating is performed so as not to drop below the freezing temperature of the hydraulic fluid.
The method for heating a stationary induction device winding according to any one of 1. 6. The method for heating a static induction device winding according to claim 3, wherein the heating means generates heat by an exothermic reaction such as oxidation. 7. The method for heating a stationary induction device winding according to claim 3, wherein the heating means is an electric heater. 8. The stationary induction device winding according to claim 3, wherein the heating means diverts heat generated from an engine of a transportation vehicle that transports the stationary induction device winding. How to heat the wire.