JP4742009B2 - Panel storage type transformer - Google Patents

Description

  The present invention relates to a steady rest structure for preventing transmission of vibration of a transformer to the panel side.

  As a measure against seismic steadying of the transformer, an upper fixing bracket is provided on the upper clamp, and it is fixed with bolts via an anti-vibration rubber between the mounting bracket on the panel frame side. Anti-vibration rubber has a high natural frequency because no load is applied in the vibration direction. When a low vibration isolator with a low natural frequency is attached to the lower part of the transformer as a countermeasure to suppress vibration on the floor, the natural frequency of the anti-vibration rubber at the top of the transformer is the natural frequency of the low vibration isolator. Therefore, there is a problem that the vibration is transmitted to the board frame and the effect of the low vibration isolator cannot be sufficiently obtained. Therefore, it is necessary to use a structure that eliminates the contact point on the upper part of the transformer and has an anti-seismic anti-sway performance without directly contacting the transformer body.

  In Patent Document 1 (Japanese Patent Laid-Open No. 11-87145), a transformer body and a panel for storing the transformer body are fixed on a common base, and a support member is coupled between the base and the upper part of the transformer body. It is described that securing the seismic strength of the transformer main body and the board without providing an earthquake-resistant structure by connecting both ends of the upper part of the transformer main body to the board.

Japanese Patent Laid-Open No. 11-87145

  In the conventional structure, since the upper part of the transformer is in contact with the panel side via the anti-vibration rubber, there is a problem that the vibration of the transformer body is transmitted from the upper part of the transformer to the outside. In addition, when a low vibration isolator with a low natural frequency is attached to the lower part of the transformer, the natural vibration of the anti-vibration rubber at the top of the transformer is greater than the natural frequency of the low vibration isolator, so that vibration is generated. There was a problem that the effect of the low vibration isolator could not be sufficiently obtained when transmitted to the panel frame.

  Further, even in the configuration of Patent Document 1, the effect of vibration isolation from the transformer to the panel was not obtained.

  In order to solve the above problems, an object of the present invention is to provide a transformer steadying structure having a seismic steadying performance without transmitting vibrations.

In order to solve the above-mentioned problems, the present invention allows a bolt to protrude outside the width of the transformer and penetrates through a hole provided in a steady seat on the panel side to function as a stopper when the transformer swings.
Furthermore, it becomes a structure which has an earthquake-proof function of a triaxial direction by fixing the tip of the penetrated bolt with a nut.
In addition, in a panel storage type transformer in which a transformer having an anti-seismic anti-vibration portion at the top is housed in a panel in which the transformer is housed, the vibration isolator for preventing vibration frequency twice the commercial frequency It is provided in the lower part of the machine and has a structure in which the bolt protrudes outside the width of the transformer as the seismic anti-static part, and the bolt and the hole are not in contact with each other through the hole provided in the steady rest on the panel side A predetermined interval is provided so that the hole of the steady rest on the panel side is a long hole in the vertical direction.
Like that.

  By suppressing a large shake of the transformer according to the present invention, it is possible to prevent an accident such as a collision with a peripheral device and a cable disconnection, and to provide a transformer having seismic strength.

  Embodiments of the invention will be described below with reference to the drawings.

  FIG. 1 (a) is a front view of the overall configuration of a panel storage type transformer, and FIG. 1 (b) shows a top view, in which a three-phase molded transformer body is stored in a rectangular panel. .

  In FIG. 1 (a), the transformer body and the panel are fixed to a common base embedded with concrete or the like by bolts or the like.

  In FIG. 1, reference numeral 1 is a mold part in which a coil is covered with resin, 2 is a tap switching part, 3 is an upper clamp, 4 is a lower clamp, and in a transformer, the mold body is attached to the upper clamp 3 and the lower clamp 4. 5 is a primary terminal, 6 is a secondary terminal, and 7 is a vibration isolator for the ground. 8 is a board, 9 is a vibration isolator to the board side, and it is provided in two places on the left and right when viewed from the front of the transformer. During operation of the transformer, it vibrates due to the magnetostriction of the iron core, and the vibration frequency due to this magnetostriction is twice the frequency of the commercial frequency. Next, the vibration isolator 9 will be described so that vibrations of these frequencies are not transmitted to the panel side.

  2 and 3 are diagrams showing the seismic anti-rest structure of the present invention of FIG. 1, FIG. 2 is a partially enlarged view from the top surface of the anti-rest structure of the present invention, and FIG. 3 shows the anti-rest structure of the present invention. The partial enlarged view from a horizontal surface is shown.

  2 and 3, reference numeral 10 denotes an anti-rest fitting, 11 denotes an anti-rest bolt, 12 denotes an anti-rest seat, which corresponds to the outer plate on the panel side, 13 is a nut, and 14 is a round hole through which the bolt 11 is passed.

  2 and 3, the steadying portion of the molded transformer main body is composed of the steadying fitting 10 and the M12 steadying bolt 11. An M12 steady bolt 11 is attached to the steady bracket 10 and tightened with a nut, and fixed in a state of protruding outward from the width of the transformer. The M12 steady bolt 11 projecting outward penetrates the φ19 round hole 14 provided in the steady seat 12 on the panel side, and cuts off the transmission of vibration without directly contacting the M12 steady bolt 11 in a normal state. At the time of an earthquake, the M12 steady bolt 11 stops at the φ19 round hole 14 and suppresses the shake as a stopper. Moreover, it becomes a structure which has a seismic-proof function of a triaxial direction by providing a space | interval and fixing the nut 13 in the tip of the penetrated M12 steady-rest bolt 11 so that it may not contact with the steady-state seat 12 on the board side. . With such a configuration, vibration due to the magnetostriction of the iron core becomes difficult to be transmitted to the board side, and the influence on the board side can be eliminated. In addition, according to this configuration, it is not affected by a 2G earthquake.

4 and 5 show a conventional seismic anti-rest structure. 4 shows a partially enlarged view from the top surface of the conventional steady rest structure, and FIG. 5 shows a partially enlarged view from the side of the conventional steady rest structure.
4 and 5, reference numeral 10 'denotes an anti-rest fitting, 11' denotes an anti-rest bolt, 12 'denotes an anti-rest seat, 13' denotes a nut, 14 'denotes a round hole through which the bolt 11 passes, and 15 denotes an anti-vibration rubber. .

  The anti-rest metal fitting 10 ′ is fixed to the panel side anti-static seat 12 ′ with the anti-vibration rubber 15 with the anti-vibration bolt 11 ′ and the nut 13 ′. It is structured to transmit to the board side. The vibration-proof rubber cannot completely eliminate vibration, that is, the vibration frequency due to magnetostriction of the iron core can be reduced, but the vibration of low frequency such as an earthquake cannot be reduced.

  In the first embodiment, an example in which the steadying metal fitting 10 is provided on the transformer body 1 side and the steadying bolt 11 is fixed is shown. However, as shown in FIGS. 6 and 7, the steadying bolt is attached to the steadying seat 12 on the panel side. The above-described steadying effect of the transformer body can also be obtained by fixing 11 ″ and penetrating it through the steadying bracket 10 ″ of the transformer body.

6 shows a partially enlarged view from the top surface of the steady rest structure according to the second embodiment of the present invention, and FIG. 7 shows a partially enlarged view from the side of the steady rest structure according to the second embodiment of the present invention.
That is, in FIGS. 6 and 7, 10 ″ is a steady rest metal fitting, 11 ″ is a steady rest bolt, 12 ″ is a rest seat on the panel side, 13 ″ is a nut, and 14 ″ is a round hole through which the bolt 11 ″ is passed. A steady bolt 11 "is fastened together with a nut to a steady seat 12" on the panel side, and a round hole 14 "is provided in the steady bracket 10" of the transformer body to pass the bolt 11 "and penetrates the bolt 11". Then, the bolt 11 "and the round hole 14" are fixed with an interval so as not to be in direct contact with each other in a normal state. In the event of an earthquake, the M12 steady bolt 11 stops at the φ19 round hole 14 to suppress the shake as a stopper and has a structure having a three-axis earthquake resistance function.

  In the first embodiment, a round hole is provided in the steady seat 12 on the board side and the steady bolt 11 is penetrated. However, even if the hole shape is a long hole, the steady effect is obtained. 8 and 9 show examples of the hole shape of the steady rest 12. The vertical hole diameter 21 is increased in consideration of sag due to deterioration of the vibration-proof rubber at the lower part of the transformer. Further, the movable range can be increased by increasing the horizontal hole diameter 20.

  By carrying out the present invention, a large shake of the transformer is suppressed, thereby preventing an accident such as a collision with a surrounding device or a cable disconnection, and providing a transformer having seismic strength.

The whole block diagram of the mold transformer of the present invention is shown. The partial enlarged view from the upper surface of the steady rest structure of this invention is shown. The partial enlarged view from the side surface of the steady rest structure of this invention is shown. The partial enlarged view from the upper surface of the conventional steady rest structure is shown. The fragmentary enlarged view from the side surface of the conventional steady rest structure is shown. The elements on larger scale from the upper surface of the steady rest structure of Example 2 of this invention are shown. FIG. 5 shows a partially enlarged view from the side surface of the steady rest structure of Embodiment 2 of the present invention. The example of the hole shape of the steady rest of this invention is shown. The example of the hole shape of the steady rest of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mold part 2 of mold transformer ... Anti-rest fitting 3, 3 ', 3 "Upper clamp 4 ... Lower clamp 7 ... Anti-vibration device 9 ... Anti-vibration device 10, 10', 10" ... Anti-rest fitting 11 , 11 ', 11 "... steady-rest bolts 12, 12', 12" ... steady-rest seats 13, 13 ', 13 "... nuts 14, 14', 14" ... Round hole 15 Anti-vibration rubber 21 and 22 Anti-vibration seat holes for the anti-vibration bolts to pass

Claims (1)

In a panel storage type transformer housed in a panel where the transformer is housed a transformer with an anti-seismic anti-rest part on the top,
An anti-vibration device for isolating a vibration frequency twice the commercial frequency is provided below the transformer,
And the seismic vibration structure protruding the transformer bolt outside the width of the stopper portion,
A predetermined interval is provided so that the bolt and the hole are not in contact with each other through the hole provided in the steady rest on the board side,
Panel housing type transformer clamp seating hole of deflection of the board side is characterized <br/> be long hole in a vertical direction.

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