JPS60247907A - Tank for stationary induction electric apparatus - Google Patents

Abstract

PURPOSE:To increase buckling strength of a cover, and to contrive to form a tank for stationary induction electric apparatus in a small type and in light weight by a method wherein longitudinally reinforcing beams are provided in the longitudinal direction on the long side side walls of the apparatus, and base reinforcing beams are provided on the base plate to form a tank, and cover reinforcing beams are fixed on a partially cylindrical shell cover. CONSTITUTION:Longitudinally reinforcing beams 27 are fitted to the long side side walls 28, base reinforcing beams 30 are fixed to a base 29, and a flange 16a is provided. Cover reinforcing beams 25 are fixed to a partially cylindrical shell cover 17, and a flange 17a is provided. The partially cylindrical shell cover 17 is covered on a transformer main body, and clamped to be fixed according to the flanges 16a, 17a. A transformer main body 31 wound with a winding 31b around a core 31a is accommodated inside of the transformer tank thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stationary crocodile conductor tank, and more particularly to an improvement in a lid that is placed over a tank body.

[Technical background of the invention and its problems]

A stationary induction tank, such as a transformer or accelerator, such as a conventional transformer tank, is shown in FIG. That is, the transformer tank 1 is formed from a tank body 2 and a lid 3. A transformer body 5 consisting of a winding 5b wound around an iron core 5a is housed inside the transformer tank 1, a bushing 6 is attached, and a conservator 7 is installed on the lid 3 via a support member 7a. , is formed by filling the inside of the transformer tank 1 with insulating oil 1a.

The tank body 2 includes a long side wall made of a flat plate side wall 8, a short side wall fixed to both ends of the long side wall, and a bottom plate 9. A reinforcing beam 10 made of a shaped steel is fixed to the flat plate side wall 8 in the vertical direction. The lower end of this reinforcing beam 10 is the reinforcing beam 11 at the bottom 'JfM9.
connected by welding. Further, the plate-shaped lid 3 is provided with a reinforcing beam 12, which is connected to the upper end of the reinforcing beam 10 of the tank body 1 by connecting members 13 provided at both ends of the reinforcing beam.

However, in this type of transformer tank 1, the vacuum external pressure when insulating oil is injected and the oil pressure inside the tank during transformer operation are
Since the upper end of the reinforcing beam 10 of the flat plate side wall 8 is connected to the reinforcing beam 12 of the lid 3 via the connecting member 13, the reinforcing beam 10
, 11 and 12 to ensure durability. However, this has resulted in problems such as an increase in plate thickness, an increase in the number of reinforcing beams, and a complicated structure, resulting in an increase in manufacturing time.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its objects are to increase the buckling strength of the lid, to reduce the size and weight of the lid, and to provide a stationary structure that facilitates assembly work at high places on the lid. Our goal is to provide induction tanks.

[Summary of the invention]

In order to achieve this object, the present invention provides long side walls parallel to each other, short side walls fixed to both sides of the long side walls, and a bottom formed by the long side walls and the known side walls. A tank body is formed by fixing a bottom plate to the tank, a vertical reinforcing beam on the long side wall and a bottom reinforcing beam on the bottom plate, and a lid reinforcing beam with a horizontal part on the partial cylindrical shell lid. The lid is formed by covering the tank body with the internal cylindrical shell i, thereby increasing the buckling strength of the lid, reducing its size and weight, and facilitating assembly work at high places on the lid. do.

[Embodiments of the invention]

An embodiment of the stationary induction electric device of the present invention is shown in Figs. 1 and 2 below.
This will be explained with reference to the figures. A stationary induction electric equipment tank such as a transformer or a reactor, for example a transformer tank 15, has a partial cylindrical shell lid 1 on the lower tank body work 6 as shown in FIG.
7, and the two flanges lOa and 17a are tightened to be firmly fixed. Although not shown in the figure, this transformer P houses a transformer body in which a winding is wound around an iron core, and a bushing 19 is attached to a bushing pocket 18 provided on the side wall of the tank body ladle. The lower end of the bushing 19 and the winding of the transformer body are connected. Further, a conservator 2o supported by a support member 20a is provided above the partial circle S shell cover 17, and this conservator 20tj communicates with the inside of the transformer tank 15 through piping (not shown). Furthermore, a cooler 21 is provided on the side surface of the transformer tank 15 and is connected to the transformer tank 15 through a pipe 22 so as to communicate with the transformer tank 15 . The inside of the transformer tank 15 is filled with insulating oil, and the cooler 21, conservator, and bushing socket 18 are also filled with insulating oil.

The tank body 16 has long side walls made of parallel flat plate side walls, and short side walls made of flat plates or partial cylindrical shells fixed to both ends of the long side walls, and a bottom plate is provided on the bottom formed by both. . A plurality of vertical reinforcing beams are fixed in the longitudinal direction of the long side walls, and a bottom reinforcing beam is provided on the bottom plate with each end fixed to the vertical reinforcing beams.
A flange 16a is provided on the opening side of the flange 16a.

The partial cylindrical shell lid 17 has an arc-shaped cross section, and a plurality of lid reinforcing beams 25 are fixed to the upper side of the lid along the arc shape. Further, this lid reinforcing beam 5 has horizontal portions 25a on both long side walls and at approximately the center of the top.

25g and 25bt-provided. This horizontal part 258, 2
58 and 25b are selected so that the bending strength of the lid reinforcing beam 5 does not decrease, that is, the bending strength is almost the same as when no horizontal portion is formed.

Next, the effects of the present invention will be explained. In FIG. 2, when insulating oil is injected into the transformer tank 15, for example, external pressure is applied to the transformer tank 15 by drawing a vacuum inside the transformer tank 15 due to the vacuum. Also as a transformer J! When filled with IMk oil, pressure is applied from the inside by the hydraulic pressure in the transformer tank 15. At this time, the partial cylindrical shell lid 17 withstands the buckling strength of the partial cylindrical shell itself and the bending rigidity including the lid reinforcing beam 25, and the running force of the end of the partial cylindrical flame shell lid 17 is transferred to the long side wall of the tank body 16. It is designed to withstand the bending stiffness of the longitudinal reinforcing beam n.

That is, as shown in FIG. 2, a vertical reinforcing beam 27 is attached to the long side wall passage of the tank body 1Gti, and a bottom reinforcing beam is fixed to the bottom plate, and a flange 16a is provided.

Further, a lid reinforcing beam 5 is fixed to the partial cylindrical shell lid 17, and a flange 17a is provided. Then, cover the tank body 16 with the partial cylindrical shell lid 17 and tighten and secure it with 7 ranks 16g and 17aK. Inside this transformer tank 15 is an iron core 31a.
A transformer main body 31 with a winding 31b wound therein is housed. Furthermore, the member end force PA generated in the partial cylindrical shell lid 17 in response to the external pressure P, and the upper end force PB of the longitudinal reinforcing beam 27 of the long side wall 28
The opposite directions of J cancel each other out, increasing the strength, so the thickness of the tank body and lid can be made thinner than in conventional tanks, and the number of reinforcing beams can be reduced.

In addition, as shown in FIG. 1, in the partial cylindrical shell cover 17, during the installation work of attached devices such as the bushing 19, the conservator 20, and the cooler 21, and the transformer assembly work,
The workers 32 can carry out their work by riding on the horizontal parts 25a, 25a, and 25b formed on the lid reinforcing beams 25 of the partial cylindrical shell lid 17, which provides good footing for high-altitude work.
It has the advantage of allowing safe work.

〔Effect of the invention〕

As explained above, according to the present invention, longitudinal reinforcing beams and bottom reinforcing beams are provided on the long side walls and the bottom of the tank body, respectively,
A lid reinforcing beam is provided on the partially cylindrical shell lid, horizontal portions are formed at both ends and approximately in the center of the lid reinforcing beam, and the partial cylindrical shell lid is tightened to the tank body through each 72-inch. By fixing, it is possible to provide a static conductor tank that can withstand the internal and external pressure of the rice conductor tank, has a lJS shape, is lightweight, and allows work at high places to be carried out safely and easily.

[Brief explanation of the drawing]

Fig. 1 is a front view of the transformer tank of the present invention, and Fig. 2 is a front view of the transformer tank of the present invention.
FIG. 3 is a cross-sectional view of stress distribution when external pressure due to vacuum is applied to the transformer tank, and FIG. 3 is a front view of a conventional transformer tank. 15 Transformer tank, 16 Tank body, 16a+i7
a Flange, F Partial cylindrical shell lid, 18...Bushing pocket, 19...Bushing, 20...Conservator, 21 Cooler, 5. Lid reinforcement beam, 25a, 25
b...Horizontal part, 27 Vertical reinforcing beam, 27 Long side wall, 29 Bottom plate, 30 Bottom reinforcing beam, 31... Transformer body, 32 Worker. Agent Patent Attorney Mr. Inoue Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a silent fat conductor tank formed by covering the tank body with a lid, the tank is formed by long side walls parallel to each other, short side walls fixed to both sides of the long side walls, and the long side and short side walls. a tank body formed by fixing a bottom plate to the bottom, and vertically reinforcing the long side walls with a plurality of vertical reinforcing beams; and a lid reinforcing beam having a horizontal portion on a partial cylindrical shell lid that covers the tank body. A stationary induction electric tank characterized in that the tank main body and the partial cylindrical shell are connected through respective flanges.