JPS6342496Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to an air-cooled oil-filled electrical equipment having a structure including an electrical equipment main body, a main body tank containing insulating oil, and a radiator attached to the main body tank. In particular, the present invention relates to an air-cooled oil-filled electrical appliance with an improved fixing structure for a cooling fan attached to a radiator.

[Technical background of the invention and its problems]

In general, in air-cooled oil-filled electric machines, the cooling fan that sends cooling air to the radiator is equipped with a supporting hardware attached to a mounting seat fixed to the main body tank that houses the electrical equipment. A structure was adopted in which it was fixed using hexagonal nuts.

However, in recent years, the main body tanks, such as oval tanks, are covered with radiators and lead terminals to save oil, so cooling fans are often attached to radiators. The mounting structure of a cooling fan using this radiator will be explained with reference to FIGS. 1 to 4.

The number of heat radiators 2 attached to the main body tank 1 varies depending on the capacity of the equipment, but generally a transformer of around 5000 KVA is composed of several dozen panels 3. Using the side surface of the panel 3, several mounting seats 4 are fixed to the panel 3 by welding or the like, and the cooling fan 5 is fixed to the mounting seats 4 with bolts 6, nuts 7, etc.

However, in such a structure, panel 3 is generally
Since thin plate material is used to obtain a cooling effect, welding to the thin plate part is required, which not only causes oil leaks, but also requires great care in this work. In particular, welding of thin plate parts is susceptible to vibration caused by the operation of the cooling fan 5 and is easily damaged.

In addition, the standardized mass-produced radiator 2 is returned to the welding process in order to weld the mounting seat 4 for fixing the cooling fan 5 between the panels 3, and after the mounting seat 4 is fixed by welding, an oil tightness test is performed. Not only is there a large amount of lost time in the manufacturing process, such as when performing It had many drawbacks, such as greatly disrupting the flow of the process line.

[Purpose of invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks, eliminate the cause of oil leakage, and provide an air-cooled oil-filled electrical device having a cooling fan fixed structure that makes it possible to significantly reduce the number of assembly steps. It is something.

[Summary of the idea]

In order to achieve such an objective, the present invention provides a non-slip fitting that is hooked onto a stay provided on the side of a radiator, and a plurality of mounting fittings for attaching a cooling fan, which are placed between the panels and installed between the panels. It is characterized in that it is fixed to studs fixed to the panel in a sandwiching manner, and the mounting metal fittings located at the upper part of the studs are connected to the anti-slip metal fittings.

[Example of idea]

An embodiment of the present invention will be described in detail below with reference to FIGS. 5 to 11.

It should be noted that parts that are the same as those in the prior art are designated by the same reference numerals. In Figures 5 to 8, main tank 1
The electrical equipment and insulating oil are stored inside. Several panel-shaped radiators 2 attached to the main body tank 1 are each made up of several dozen panels 3 and communicated with the main body tank 1 via upper and lower piping. Each radiator 2 has stays 8 fixed to the top and bottom of both sides thereof, extending in a direction perpendicular to the width direction of the panel 3 in order to prevent vibrations and reinforce the panel 3. Among them, radiator 2A located on one side
An anti-slip fitting 9 is hooked onto an upper stay 8a provided at the top. As shown in FIG. 9, this anti-slip hardware 9 has a curved portion 9a at the top for hooking onto the stay 8a, and a hole 9 at the bottom for connecting and fixing with a stud, which will be described later.
It has b.

On the other hand, in the middle part of the radiator 2A in the height direction, there is an upper
Cooling fan mounting hardware 10 is provided at two locations on each bottom. As shown in FIG. 10, this mounting hardware 10 has a hole 10a at one end of the flat plate for connecting and fixing a stud to be described later, and a stud 10b at the other end for attaching a cooling fan. is provided on the side surface of the heat radiator 2A so that it is located on the outside. Further, each mounting hardware 10 is fixed to the panel 3 by a stud 11 disposed between the panels 3. Stud 11 is the first
As shown in FIG. 1, one end of the rod has a threaded portion 11a which is threaded, and the other end has a backing plate 11b that comes into contact with the side surface of the panel. Therefore, this stud 11 is arranged between the panels 3 so that the backing plate 11b is located on the opposite side to the mounting hardware 10, and by screwing the nut 7 through the hole 10a of the mounting hardware 10 through the threaded portion 11a. , is fixed to the panel 3 with the panel 3 sandwiched between the backing plate 11b and the mounting hardware 10. In this case, mounting hardware 1
0 is also fixed to panel 3. Then, attach the cooling fan 5 to the stud 10b of each of these mounting hardware 10 with a nut 7.
to fix the cooling fan 5 to the panel 3.
Further, among the plurality of mounting hardware 10, the two mounting hardware 10 located at the top are each connected to the anti-slip hardware 9. This connection is stud 11
Pass the nut 7 through the hole 10a of the mounting hardware 10 and the hole 9b of the anti-slip hardware 9 through the threaded portion 11a of the
This is done by screwing them together.

With this structure, the mounting hardware 11 to which the cooling fan 5 is attached is fixed with the studs 11 and nuts 7 so as to sandwich the panel 3, and the mounting hardware 10 is also prevented from shifting in the height direction. Since the hardware 9 is also hooked onto the stay 8a, there is no need to weld a mounting seat or the like to the panel 3 in order to attach the cooling fan 5.

Therefore, in the radiator 2, there is no fear of oil leakage due to the attachment of the cooling fan 5. Furthermore, radiator 2
Since there is no need to perform any processing on a single standard product, not only is there no loss of time in the manufacturing process, but also the number of radiators 2 used can be reduced when installing the radiator 2 to the main body tank 1. Since they are all the same standard products, they can be installed in any mounting position, making the flow of the assembly process smooth and without confusion.

Furthermore, even if the mounting position of the cooling fan 5 is changed to one side of the opposite side due to a layout change at the customer site, the mounting seat is not welded between the panels 3 of the radiator 2, so it is a simple task of reinstalling it. Furthermore, even when adding and installing a cooling fan on-site to increase the capacity of the transformer, it is only a simple task of adding and assembling parts.

[Effect of idea]

As described above, in the air-cooled oil-filled electrical equipment according to the present invention, there is no oil leakage from the radiator due to the attachment of the cooling fan, and the number of assembly steps can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are plan and front views of conventional air-cooled oil-filled electrical equipment, Figure 3 is an enlarged plan view of the main parts of Figure 1, and Figure 4 is a conventional installation. Partially enlarged side view showing the relationship between the seat and the stay, No. 5
6 and 6 are a plan view and a front view showing an embodiment of the air-cooled oil-filled electrical equipment according to the present invention, FIG. 7 is an enlarged view of the main part of FIG. The figure is an enlarged view of the main part of Fig. 5 in the direction of arrow B, Fig. 9 is a perspective view showing the anti-slip hardware used in the present invention, and Fig. 10 is a perspective view showing the mounting hardware used in the present invention. FIG. 11 is a perspective view of the stud used in the present invention. DESCRIPTION OF SYMBOLS 1...Main tank, 2, 2A...Radiator, 3...Panel, 5...Cooling fan, 8, 8a...Stay, 9...Slip prevention hardware, 10...Fixing hardware, 11...Stud.

Claims (1)

[Scope of utility model registration request] In a system in which a plurality of panel-shaped radiators are attached to the main body tank that stores the electrical equipment body and insulating oil inside, and a cooling fan is attached to one side of these radiators, the radiator is installed on the side of the radiator, and A plurality of mounting hardware for attaching the cooling fan are provided by hooking them onto the stays that connect the respective panels constituting the panel, and a stud is fixed to the panels so as to sandwich the panels. 1. An air-cooled oil-filled electrical device, characterized in that the air-cooled oil-filled electrical equipment is configured by connecting a mounting hardware located at an upper part of the mounting hardware to the above-mentioned slip-preventing hardware.