JP2001135527A - Stationary induction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stationary induction equipment capable of reducing an outer form occupation space. SOLUTION: Concerning the stationary induction equipment, with which a cooling medium stored in the tank of a main body is refluxed with a cooler, the cooling medium is refluxed through the inside of a hollow reinforce beam directly attached to the upper surface of the main body tank at least.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction device such as a transformer and an induction voltage regulator, and more particularly to a static induction device having an improved cooling structure.

[0002]

2. Description of the Related Art A conventional static induction device such as a transformer or an induction voltage regulator has a perspective sectional view shown in FIG. 5 and a partially cutaway side view shown in FIG. That is, an upper pipe 2 and a lower pipe 3 are connected to the upper and side surfaces of a main body tank 1 that accommodates a core (not shown) and windings and stores a cooling medium (insulating oil or insulating gas). The upper manifold 4 and the lower manifold 5 are connected at the end of the lower manifold 5. A cooler 6 is connected between the upper manifold 4 and the lower manifold 5. Reinforcing beams 7 are attached to the upper and lower surfaces and side surfaces of the main body tank 1 by welding or the like to increase rigidity and mechanical strength.

[0003] In a stationary induction device having such a structure,
The cooling medium whose temperature has been increased by cooling the windings and the iron core in the main body tank 1 becomes a cooling medium flow 8, the main body tank 1, the upper pipe 2, the upper manifold 4, the cooler 6, the lower manifold 5,
Circulates through the lower pipe 3 and the main tank 1.

[0004]

In the conventional stationary induction device as described above, the cooling device including the upper pipe 2, the lower pipe 3, the upper manifold 4, the lower manifold 5, and the cooler 6 has a large volume and weight. Occupy. Therefore, there are problems that a large number of man-hours are required for transporting and installing the stationary guidance device, and that the use efficiency of the installation space is low. Therefore, an object of the present invention is to provide a static induction device capable of efficiently using the space occupied by the outer shape.

[0005]

According to a first aspect of the present invention, there is provided a stationary induction device in which a cooling medium stored in a main body tank flows back and forth between a cooling unit and the cooling medium. Both are configured to recirculate through a hollow reinforcing beam directly attached to the upper surface of the main body tank.

According to a second aspect of the present invention, in the first aspect of the present invention, a straightening pipe is provided in a through hole provided on the main body tank surface in the reinforcing beam and through which a cooling medium flows. According to a third aspect of the present invention, in the first aspect of the invention, a valve is provided in a through hole provided on the main body tank surface in the reinforcing beam and through which the cooling medium flows.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective sectional view of a stationary guidance device according to a first embodiment of the present invention, and FIG. 2 is a partially cutaway side view.

More specifically, an upper reinforcing beam 10 and side portions are provided on the upper surface and side surfaces of a main body tank 1 which accommodates an iron core and windings (not shown) and stores a cooling medium (insulating oil or insulating gas) for cooling these iron cores and windings. Attach the reinforcing beam 11. Between the main body tank 1 and the upper reinforcing beam 10 and the side reinforcing beam 11, there is provided a through hole 12 through which the cooling medium flow 8 flows. Then, the cooler 6 is connected between the upper reinforcing beam 10 and the side reinforcing beam 11.

In the stationary induction device having such a structure,
The cooling medium that has cooled the coil and the iron core in the main body tank 1 and raised in temperature is collected as a cooling medium flow 8 at the upper part of the main body tank 1, enters the upper reinforcing beam 10 through the through hole 12, and from there. The flow is divided into a plurality of cooling units constituting the cooler 6. The cooling medium 8 whose temperature has been lowered by the cooler 6 collects in the side reinforcing beam 11 and returns to the main tank 1.

[0010] In the stationary induction device of the present embodiment having such a configuration, since there is no pipe connecting the main body tank and the upper or lower manifold in the conventional stationary induction device, the space occupied by the outer shape is reduced as compared with the conventional one. Is done.

FIG. 3 shows a second embodiment of the present invention.
That is, a flow straightening tube 13 is provided in the through hole 12 between the main body tank 1 and the reinforcing beam, particularly the side reinforcing beam 11. According to such a configuration, the flow of the cooling medium can be laminarized and flow accurately to the object to be cooled in the tank to increase the cooling efficiency and reduce noise due to turbulence.

Next, a third embodiment of the present invention is shown in FIG. In this embodiment, a valve 14 is provided in a through hole 12 between the main body tank 1, the upper reinforcing beam 10, the side reinforcing beam 11, or any one of the reinforcing beams. The valve 14 may be opened and closed manually from outside the reinforcing beams 10 and 11, or may be remotely operated as an electric valve. According to this embodiment, the flow rate of the cooling medium can be adjusted according to the load of the stationary induction device and the temperature rise.

[0013]

According to the present invention, there is provided a stationary induction apparatus in which a cooling medium stored in a main body tank flows back and forth between the cooling medium and the cooling medium, wherein the cooling medium is at least hollow and directly attached to the upper surface of the main body tank. In this configuration, the connection between the manifold and the main body tank as in the related art is not required, so that the space occupied by the outer shape can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view of a stationary guidance device according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the stationary guidance device according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a main part of a stationary guidance device according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a stationary guidance device according to a third embodiment of the present invention.

FIG. 5 is a perspective sectional view of a conventional stationary guidance device.

FIG. 6 is a partially cutaway side view of a conventional stationary induction device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body tank, 2 ... Upper piping, 3 ... Lower piping, 4 ... Upper manifold, 5 ... Lower manifold, 6 ... Cooler, 7 ...
Reinforcing beam, 8: cooling medium flow, 10: upper reinforcing beam,
11: side reinforcing beam, 12: through hole, 13: straightening tube,
14 ... Valve.

Claims (3)

[Claims] 1. A stationary induction machine in which a cooling medium stored in a main body tank flows back and forth between the cooling medium and a cooling medium, wherein the cooling medium is provided in at least a hollow reinforcing beam directly attached to an upper surface of the main body tank. A stationary induction device characterized in that the current flows through a stationary induction device. 2. The stationary induction device according to claim 1, wherein a flow straightening tube is provided in a through hole provided on the main body tank surface in the reinforcing beam and through which the cooling medium flows. 3. The stationary induction device according to claim 1, wherein a valve is provided in a through hole provided in the main body tank surface in the reinforcing beam and through which the cooling medium flows.