KR20060086727A - Coagulation preventing apparatus for winding coil of electric equipment using heat pipe - Google Patents

Abstract

The winding coil condensation preventing device of the disclosed electrical equipment includes a heat source supply pipe branched from a heating wiring of a heating system, a heat pipe installed at one side of the inside of a case of the electrical equipment and filled with a heat transfer medium, and the other of the heat pipe. It comprises a heat exchanger for connecting the side and the heat source supply pipe to the heat exchange. Such a condensation preventing device uses heat from an adjacent heating system, so that it is possible to realize a smooth and stable condensation preventing device even by adding a small amount of equipment, and transfer heat as it is without converting electricity into heat. Is also high.

Heat Pipe, Heating, Winding Coil, Condensation

Description

Coagulation preventing apparatus for winding coil of electric equipment using heat pipe}

1 is a view showing the overall configuration of the winding coil condensation preventing apparatus according to an embodiment of the present invention,

2 and 3 are views for explaining the operating state of the winding coil condensation preventing device shown in FIG.

4 is a view showing the configuration of the winding coil condensation preventing apparatus according to another embodiment of the present invention,

5 is a view showing the configuration of the winding coil condensation preventing apparatus according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10 ... heating system 11 ... boiler

12 Heating pipes 20 Heat source supply pipes

30 ... heat exchanger 40 ... heat pipe

50 ... electrical equipment

The present invention relates to a condensation preventing device for preventing the condensation of moisture in the winding coil used to form a magnetic field in electrical equipment such as transformers, current transformers, electric motors, generators.

In general, electrical equipment such as transformers, current transformers, electric motors, and generators have a winding coil for inducing electromagnetic interaction. That is, a magnetic field is formed by flowing a current through the winding coil to obtain power, or conversely, an electromagnetic action is induced such as obtaining current from a magnetic field formed around the winding coil.

However, when the humidity is increased in the electrical equipment in which the winding coil is embedded, a phenomenon in which water vapor in the air condenses into water and adheres to the winding coil is frequent. This phenomenon causes insulation breakdown of the winding coils and shortens the service life of electrical equipment. Therefore, in order to prevent this, conventionally, a method of installing and operating an electric heater inside the case of the electric equipment has been generally employed. However, when the condensation of the water vapor is prevented by using the electric heater, there is a disadvantage in that a lot of energy loss occurs during the conversion of the electric energy and the thermal energy. In addition, complex electrical switchgear systems and manufacturing facilities have to be equipped with the disadvantage of having to bear the burden of operating costs such as excessive facility investment and rising electric bills. In addition, there are many additional facilities such as connecting cables from the electrical switchboard to the location where each electric equipment is installed and installing terminal box at the connection part. There is a problem that can be raised to the incidence of safety accidents.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a winding coil condensation preventing device of an electric equipment that is improved to prevent condensation while reducing the size of facility investment.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. In addition, the objects and advantages of the invention may be realized by the means and combinations indicated in the claims.

Winding coil condensation preventing device of the present invention for achieving the above object, the heat source supply pipe branched from the heating wiring of the heating system; A heat pipe installed at one side of the inside of the case of the electrical equipment and filled with a heat transfer medium; And a heat exchanger connecting the other side of the heat pipe and the heat source supply pipe to perform heat exchange.

Here, it is preferable to further include a calorific value control means for adjusting the heat transfer amount through the heat transfer medium, the calorie control means, by adjusting the opening degree of at least one of the heat pipe and the heat source supply pipe by adjusting the heat transfer medium. It is preferable that a flow rate control valve is provided to vary the flow rate.

The electrical equipment may be any one of a transformer, a current transformer, an electric motor, and a generator.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 illustrates a winding coil condensation preventing apparatus of an electrical apparatus according to an embodiment of the present invention.

As shown, the condensation preventing device of the present invention is configured to keep the interior of the electrical equipment 50 such as a transformer dry by using a part of the heat generated in the heating system 10 including the boiler 11. have. The detailed structure is as follows.

First, the heating system 10 has a heating pipe 12 through which a heat medium such as water circulates, and part of it is used as a heat source supply pipe 20. In other words, rather than adding a separate large equipment for the internal drying of the electrical equipment, it is to use a portion of the heating pipe 12 in the surrounding heating system. As this heating piping 12, the preheating piping normally provided in the heating system may be used.

In addition, one side of the heat pipe 40 is installed inside the case 51 of the electric equipment 50 having the winding coil 52 embedded therein. The heat pipe 40 is a kind of heat transfer tube filled with volatile liquids such as methanol, acetone, water, and mercury as a heat transfer medium, as is well known. When heat is applied to one end, the liquid absorbs the heat and evaporates the other. Move to the end, heat radiate from there and heat up on the principle of returning. Here, the part drawn into the case 51 becomes a heat radiating part.

In addition, the endothermic process of the heat pipe 40 is performed through the heat exchanger 30 connected to the heat source supply pipe 20. That is, the other side of the portion drawn into the case 51 of the heat pipe 40 is connected to the heat exchanger 30 that can be in thermal contact with the heat source supply pipe 20, and generated in the heating system 10 It is configured to receive the heat.

Reference numeral 41 denotes a flow control valve for adjusting the opening degree of the internal passage of the heat pipe 40 to change the flow amount of the heat transfer medium. When the flow rate control valve 41 is adjusted, the amount of heat introduced into the case 51 is changed, and thus the internal temperature can be adjusted.

Reference numeral 42 denotes an on / off valve used when supplying or draining the heat transfer medium into the heat pipe 40.

The winding coil condensation preventing device of such a structure is operated as shown in FIG. Before that, FIG. 2 first shows that the configuration shown in FIG. 1 is simplified and illustrated with reference to the heat pipe 40, which is a key element, so that the heat transfer process can be easily understood.

First, while the heating system 10 is operating, a heated medium, for example, heating water, is always supplied to the heat source supply pipe 20 branched from the heating pipe 12. In this state, when the on / off valves 21a and 22a provided in the heat source supply pipe 20 are opened, the heat medium circulates through the supply side line 21 and the recovery side line 22 of the heat source supply pipe 20. Then, the portion of the heat pipe 40 that is in thermal contact with the heat source supply pipe 20 through the heat exchanger 30 is heated through heat exchange. Accordingly, the liquid heat transfer medium 44 filled in the heat pipe 40 begins to evaporate. That is, the small bubbles 43 distributed in the liquid 44 absorb heat and become rapidly larger, and the bubbles 43 in the increased endothermic state are introduced into the case 51 of the electrical equipment 50. Will move towards the side. In other words, the inside of the heat pipe 40 is circulated, and since the path is connected to the inside of the case 51, it moves there. In addition, the bubble 43 moved to the inner part of the case 51 is in contact with the air inside the case 51 to cause heat exchange again to radiate heat, and after the heat dissipation, the bubble 43 becomes smaller in size. . Thereafter, the heat pipe 40 is returned to the heat exchanger 30 along the path of the heat pipe 40, and the heat source supply pipe 20 is heated, evaporated, and then transferred to the case 51.

Therefore, a part of the heat generated in the heating system 10 is smoothly transferred into the case 51 of the electrical equipment 50 through the heat source supply pipe 20, the heat exchanger 30, the heat pipe 40, the internal humidity Lowering and to prevent the phenomenon that moisture can be condensed in the winding coil (52).

On the other hand, if the heat transfer into the case 51 is too excessive and the temperature rises too much, the heat transfer medium 44 circulating inside the heat pipe 40 by slightly locking the flow regulating valve 41 as shown in FIG. 3. Reduce the flow rate. That is, the flow rate control valve 41 performs the function of the calorie control means to control the temperature of the case 51 is too high or too low.

Next, Figure 4 illustrates a winding coil condensation preventing device of an electrical equipment according to another embodiment of the present invention.

The condensation preventing device of this embodiment is also the same as the above-described embodiment configured to keep the interior of the electrical equipment 50 heated by using a part of the heat generated in the heating system 10. However, in this embodiment, the structure of the heat pipe 70 for transferring heat into the electrical equipment 50 is changed. In other words, in the above-described embodiment, the heat pipe 40 (see FIG. 2) constituted by one entire line is circulated. However, in the present embodiment, a plurality of individual heat pipes 70 having separate circulation routes are provided for heat transfer. To do. One end of each heat pipe 70 is located on the heat exchanger 30 side, the heat absorption and evaporation occurs, the other end is located in the electrical equipment 50 is a heat radiation and condensation occurs. Other operating principles are the same as in the above-described embodiment. In addition, reference numeral 60 suppresses the phenomenon of heat radiation to the outside air during heat transfer to the electrical equipment 50 as the heat insulation case. In this case, the amount of heat can be adjusted by adjusting the on / off valves 21a and 22a of the heat source supply pipe 20.

5 is a view illustrating a winding coil condensation preventing apparatus for electrical equipment according to another embodiment of the present invention.

The condensation preventing device of this embodiment is also configured to keep the interior of the electrical equipment 50 heated by using a part of the heat generated from the heating system 10, and a plurality of heat having a separate circulation route as in the embodiment of FIG. The pipe 70 is adopted. Instead, in the present embodiment, a separate heat exchanger 30 (see FIG. 4) is omitted, and the heat pipe 70 directly contacts the heat source supply pipe 20 and undergoes endothermic and evaporation, and then inside the electric equipment 50. The structure was changed to perform the heat dissipation and condensation at. That is, in the above-described embodiment, although the heat from the heat source supply pipe 20 is received through the heat exchanger 30, in the present embodiment, one end of the heat pipe 70 is coupled to the heat source supply pipe 20. 71), and the other end is configured as a second heat exchanger 72 that radiates heat inside the electric equipment 50 so that direct heat transfer is performed. Other principles of operation are the same as in the above-described embodiments.

As such, it is possible to implement a smooth and stable winding coil condensation preventing device without making a large facility investment by using the heat of the heating system in the vicinity. In addition, in the case of the transformer illustrated here, it can be used for drying all electric equipments in which winding coils, such as current transformers, electric motors, generators, and the like, can be particularly useful for power plants or factories operating large-capacity equipment.

As described above, the winding coil condensation preventing apparatus of the electric equipment according to the present invention provides the following effects.

First, since the configuration using the heat of the adjacent heating system, it is possible to implement a smooth and stable condensation prevention device only by adding a small amount of equipment.

Second, the use of excess heat of the heating system, the operating cost is lower than the conventional method using the electric heater, heat transfer efficiency is also high because it is to transfer the heat as it is without the need to convert electricity to heat.

Third, there is no need to expand the equipment that can cause electrical safety accidents such as electrical distribution boxes and terminal boxes, it is possible to ensure the safety of the user.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims (4)

A heat source supply pipe branched from the heating wiring of the heating system; A heat pipe installed at one side of the inside of the case of the electrical equipment and filled with a heat transfer medium; And a heat exchanger connecting the other side of the heat pipe and the heat source supply pipe to perform heat exchange. The method of claim 1, The winding coil condensation preventing device of the electrical equipment, characterized in that the heat amount adjusting means for adjusting the heat transfer amount through the heat transfer medium is further provided. The method of claim 2, The calorie control means, And a flow control valve for adjusting an opening degree of at least one of the heat pipe and the heat source supply pipe to change the flow amount of the heat transfer medium. The method of claim 1, The electrical equipment is a coil, condensation preventing device of the electrical equipment, characterized in that any one of a transformer, a current transformer, an electric motor, and a generator.

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