JPH0414896Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to an anti-vibration support structure for a main body of an induction electric appliance, and particularly to an anti-vibration support structure for a resin molded transformer.

[Prior art and its problems]

In induction electric appliances such as transformers, there is a problem in that magnetostrictive vibrations of the iron core propagate to the surrounding area through the air or the floor of the installation site, increasing the noise level. In particular, with resin molded transformers that are often installed in the basements of buildings in urban areas, noise propagating in the surrounding air is affected by the sound insulation effect of the resin molded windings and the sound insulation effect of the concrete walls of the installation room. This prevents it from spreading outside the installation room, but vibration and noise that propagates through the floor of the installation room and spreads into the building often becomes a problem, so vibration isolating rubber is interposed between the floor and the iron core. There is a need for a so-called anti-vibration support structure that prevents the propagation of vibrations.

FIG. 3 is a front view showing a conventional resin molded transformer and its anti-vibration support structure, and FIG. 2 is a side view of FIG. 1 viewed from the right side. In the figure, 1 is iron core 2,
The main body of the resin molded transformer consists of a resin molded winding 3, upper and lower frames 4 and 5 for tightening the iron core, etc. On the lower side of the resin molded transformer main body, there is a U-shaped cross section connected to the lower frame 5. An upper foundation frame 11 and a lower foundation frame 12 made of thin steel or the like, a pair of upper and lower foundation frames 11, 12
A vibration-proof support structure 10 is provided which includes a vibration-proof rubber 13 interposed therebetween, a steady rest pin 14, and the like.

Figure 5 is an enlarged sectional view of section A shown in Figure 3;
This figure is an enlarged sectional view of part B shown in FIG. 4, both of which show details of the vibration-proof support structure. In the figure, a pair of upper and lower foundation frames 11 and 12
is a concave groove 11A, 1 surrounded by a U-shaped frame.
The openings of 2A are arranged in opposite directions,
Rubber elastic body 13 and metal plate 13 fixed to it
The studs 13C of the vibration isolating rubber 13 made up of A and studs 13C pass through holes formed in the opposing surfaces of the pair of foundation frames, and are connected to the foundation frames 11 and 12, respectively, by fastening members 15 made of washers 15A and nuts 15B. Along with being
Excessive lateral oscillation of the induction electric appliance main body 1 is prevented by a lateral oscillation suppressing means consisting of a sway rest hole 11A and a sway rest pin 14 loosely inserted into this hole.

In the conventional induction electric appliance having the anti-vibration support structure configured as described above, the magnetostrictive vibration of the iron core is absorbed by the rubber elastic body 13A of the anti-vibration rubber 13, thereby preventing the vibration from propagating to the lower foundation frame 12 side. Therefore, it is possible to prevent vibrations (noise) from spreading over a wide range of the building via the concrete floor and base to which the lower foundation frame 12 is mechanically connected. However, in order to support the heavy induction electric equipment, it is necessary to use large thin steel for the pair of upper and lower foundation frames 11 and 12, and the anti-vibration rubber
The thickness of the rubber elastic body 13A in No. 3 requires a thickness of several tens of mm in order to maintain vibration-proofing performance.
There is a disadvantage that the height dimension H of the vibration isolation support structure becomes large, and in particular, in induction electric equipment installed in places such as underground substations where the height dimension is strictly regulated, the height of the vibration isolation support structure increases. There is a problem in that the directional dimensions even affect the capacity of the induction electric device that can be installed, and there is a need to improve this problem.

[Purpose of invention]

This idea was created in view of the above-mentioned situation.
It is an object of the present invention to provide an induction electric appliance having a vibration-proof support structure that can reduce the height dimension without impairing vibration-proofing performance, and therefore can reduce the height dimension of the induction electric appliance.

[Key points of the idea]

The present invention includes a lower foundation frame having a fixed stud in which the opening of the groove faces upward and a lower end thereof is coupled to the bottom of the groove; a main vibration isolating rubber fitted to the fixed stud; The intermediate support plate and the fixing stud are included in the lower foundation frame with the openings of the grooves facing downward, and are in contact with the upper surface of the main vibration isolator rubber in the grooves to support the induction electric device body, and the fixing studs maintain a gap. and an auxiliary vibration isolating rubber for lateral vibration buffering interposed between the fixing stud and the fastening member passing through the upper foundation frame and the upper foundation frame. With this configuration, the pair of upper and lower foundation frames and the main vibration isolating rubber have an overlap margin, which reduces the height dimension of the vibration isolating support structure, and also prevents the propagation of magnetostrictive vibrations by the main vibration isolating rubber. , the auxiliary anti-vibration rubber provides excellent anti-vibration performance due to the anti-rolling effect.

[Example of idea]

The present invention will be explained below based on examples.

Fig. 1 is a side sectional view of a vibration-proof support structure showing an embodiment of the present invention, and Fig. 2 is a partially fragmented sectional view of Fig. 1 seen from the right side. Reference numerals are given and detailed explanations are omitted.
In the figure, reference numeral 25 is a lower foundation frame that is formed into a U-shape in cross section and is fixed, for example, on the floor surface 100 of a building so that the opening of the groove 27 faces upward. The lower end of the disposed fixed stud 26 is fixed. 30 is a main vibration isolating rubber fitted to the fixed stud 26, and the upper part of the rubber elastic body 31 is provided with a ring-shaped protrusion 32 that protrudes upward, and the rubber elastic body is provided on the upper and lower surfaces that receive the load. Adhesive metal plate 3 fixed to 31
3 is provided. 21 is a groove 2 of the lower foundation frame 25 so that the opening of the groove 23 faces downward.
7, which has a hole 24B in its groove 23 that fits into the protrusion 32 of the rubber elastic body 31, and whose lower surface is in contact with the upper bonded metal plate 33 of the main vibration isolator. A contacting intermediate support plate 22 is provided, and an auxiliary anti-vibration rubber 40 with a collar is provided in the hole 24A portion of the upper foundation frame 21 through which the fixed stud 26 passes, and fills the gap between the fixed stud 26 and the hole 24A. The fixing stud 26 is attached via an adhesive metal plate 42 fixed to the upper surface side of the body 41.
A pair of upper and lower base frames 21 and 25 are elastically connected to each other by a fastening member 15 connected to the upper end of the base frame 21 and 25 via vibration isolating rubber.

In the induction electric appliance equipped with the anti-vibration support structure configured as described above, the weight of the induction electric appliance main body 1 is elastically supported by the main anti-vibration rubber 30 via the upper frame 21 and the intermediate support plate 22. Due to vibrations such as magnetostrictive vibration of the iron core, the lower foundation frame 25
It is possible to prevent the vibration (noise) from spreading to the side of the building, and to prevent the induction electric appliance main body 1 from rolling, the fixed stud 26 is used as a support member and the auxiliary vibration isolating rubber 40 is used as a cushioning material. This guide is equipped with a vibration-proof support structure that has excellent vibration-proofing performance and anti-rolling performance, since the amplitude of the vibration is suppressed and the vibration propagating through the fixed stud 26 can be absorbed by the auxiliary vibration-proofing rubber 40. You can get electrical appliances. In addition, the upper frame 21 is enclosed in the groove of the lower frame 25 so that the openings of the grooves face each other, making it possible to reduce the height dimension in accordance with the overlapping dimension of the side plates of the pair of foundation frames. By setting in advance the connection position of the intermediate pressure support plate 22 to the upper foundation frame 21 in the height direction in consideration of the compression shrinkage g of the vibration isolating rubber 30, the connection between the main vibration isolating rubber 30 and the upper foundation frame 21 is reduced. By effectively utilizing the overlap margin in the height direction, it is possible to obtain the effect of reducing the dimension in the height direction corresponding to the overlap margin. Therefore, the height dimension of the vibration isolating support structure can be significantly reduced compared to that of the prior art. Furthermore, if an excessive compressive load exceeding the maximum shrinkage margin is applied to the main vibration isolating rubber due to an earthquake, etc., the foundation frame pair will come into contact with each other to prevent excessive deformation of the main vibration isolating rubber. Damage can be prevented.

[Effect of idea]

As mentioned above, in the present invention, a pair of foundation frames are formed in different sizes so that the upper foundation frame can be contained in the groove of the lower foundation frame, and the lower end is connected to the lower foundation frame and is fitted into a fixed stud passing through the upper frame. The structure is such that the load of the main body of the induction electric device fixed on the upper foundation frame is applied to the installed main vibration isolating rubber via an intermediate support plate fixed in a groove in the upper foundation frame. As a result, the foundation frame pair overlaps each other, reducing the height dimension, and since the main vibration isolating rubber and the upper foundation frame overlap each other, the height dimension can be significantly reduced compared to the conventional technology. It is possible to provide an induction appliance with a reduced anti-vibration support structure.

In addition, auxiliary anti-vibration rubber is placed between the fixed studs that regulate the horizontal shaking of the induction equipment, the holes in the upper foundation frame, and the fastening members, and by suppressing the horizontal shaking due to its buffering effect, magnetostrictive vibrations of the iron core are prevented. It is possible to obtain a vibration-proof support structure having a propagation blocking function and a rolling suppression function. Furthermore, by positioning the companion support plate, it is possible to prevent excessive compressive deformation of the main vibration isolating rubber, thereby preventing damage to the main vibration isolating rubber due to earthquakes, etc., and thus providing a guide with a highly reliable vibration isolating support structure. There is an advantage that electric appliances can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the main parts showing an embodiment of the device of the present invention, Fig. 2 is a partially fragmented sectional view of the embodiment device taken in different angular directions, and Fig. 3 is a front view of an induction electric appliance showing the prior art. , FIG. 4 is a side view of FIG. 3 seen from the right side, FIG. 5 is an enlarged sectional view of section A in FIG. 3,
6 is a partially fragmented enlarged sectional view of section B in FIG. 4. FIG. DESCRIPTION OF SYMBOLS 1... Induction electric device main body, 10... Vibration isolation support structure part, 11, 21... Upper foundation frame, 12, 2
5...Lower foundation frame, 13, 30...Main anti-vibration rubber, 11A, 23...Concave groove (upper frame side),
12A, 27...concave groove (lower frame), 22...
...Intermediate support plate, 24...A, 24B...hole, 26
... Fixed stud, 31, 41 ... Rubber elastic body,
32...Protrusion, 40...Auxiliary anti-vibration rubber.

Claims (1)

[Claims for Utility Model Registration] 1. An upper foundation frame with a U-shaped cross section, which has a groove fixed to the lower surface of the induction electric device so as to open downward, and an intermediate support plate fixed horizontally within the groove. , and a lower foundation frame in which the opening of the concave groove is arranged upward so as to enclose the upper foundation frame, and the lower foundation frame is inserted into a through hole formed on the upper foundation frame side, and the lower end is fixed to the lower foundation frame. a main vibration isolating rubber which is formed in a cylindrical shape and surrounds the fixed stud so as to be located between the intermediate support plate and the lower foundation frame, and supports the induction electric appliance main body in vibration isolation; 1. A vibration-proof support structure for an induction electric appliance, comprising an auxiliary vibration-proof rubber for damping lateral vibration, which is interposed between a foundation frame, the fixed stud, and its fastening member. 2. The anti-vibration support structure for an induction electric appliance according to claim 1, wherein the main anti-vibration rubber has a protrusion that engages with a through hole formed in an intermediate support plate.