JPH0342663Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a stationary guidance equipment fixing device for securing the stationary guidance equipment to a foundation.

[Prior Art] For example, stationary induction equipment such as transformers and reactors must be protected from falling or moving due to earthquakes.
The equipment must be fixed in some way to the foundation on which it is installed. Generally, bolts and metal fittings are used to secure stationary induction equipment to the foundation, but in the case of low-noise types that have recently become popular, the main body of the equipment is fixed to prevent vibrations from being transmitted to the foundation. In addition to laying anti-vibration rubber underneath, anti-vibration rubber is also incorporated into the fixing device.

That is, as shown in FIG. 1, equipment 1 such as a transformer and a reactor is installed on a foundation 3 via a main body vibration isolating rubber 4, and is fixed to the foundation 3 by a fixing device 2.

As shown in FIG. 2, the fixing device 2 includes a foundation bolt 6 embedded in the foundation 3, a fixing fitting 7 fixed to the device 1, vibration-proof rubber 8a for fittings attached above and below the fixing fitting 7, 8b and bolt 9
It's starting to tighten.

By providing the necessary number of such fixing devices 2 on the equipment 1, it is possible to prevent the equipment 1 from falling or moving due to an earthquake, and by providing a gap between the fixing fittings 7 and the bolts 9, vibrations of the equipment 1 can be reduced. The vibration isolating rubber 8a and 8b for the metal fittings are used to cut off the edges so that the vibration is not transmitted to the bolt 9 and the foundation 3.

[Problems to be solved by the invention] In the conventional fixing device 2 configured as described above, the natural frequency of the vibration isolating rubbers 8a and 8b for the metal fittings is close to the earthquake frequency, so that the equipment cannot be damaged during an earthquake. 1, not only horizontal vibration but also rotational vibration occurs, and a coupled vibration of both types of vibration, so-called rocking vibration, occurs. For this reason, there have been problems in that attachment parts such as the bushing 5 are subjected to severe vibrations, and troubles occur at the inter-device connections (not shown). In addition, the thicker the metal fitting anti-vibration rubber 8a is, the greater bending stress will be generated on the bolt 9 due to sideslip force during an earthquake, so it is necessary to select a bolt with a large diameter to cope with this. There were also some problems.

This idea was created to solve the problems mentioned above. It can minimize the locking of stationary guidance equipment caused by external forces such as earthquakes, and it also reduces the bending stress generated on bolts. The object of the present invention is to obtain a fixing device for stationary induction equipment that can reduce the diameter of the bolt.

[Means for Solving the Problems] The fixing device for stationary guidance equipment according to this invention provides a predetermined gap between the foundation and the fixing metal fitting, between the bolt and the fixing metal fitting, and between the fixing metal fitting and the nut. In addition, a gap adjustment body is provided between the fixing metal fitting and the bolt.

[Function] In this invention, the vibration of the stationary induction device is prevented from being transmitted to the bolt by the gap, and the gap between the fixing metal fitting and the bolt is adjusted by selecting the gap adjusting body.

[Example] Hereinafter, an example of this invention will be described with reference to the drawings. FIG. 3 is a sectional view showing a fixing device for a stationary guidance device according to an embodiment of the invention, and the same or equivalent parts as in FIG. 2 are given the same reference numerals, and the explanation thereof will be omitted.

In the figure, 7a is a fixture fixed to the equipment 1 with a gap A between it and the foundation 3, and 11 is the foundation 3.
A spacer 14 provided above for adjusting the gap A to a predetermined size is a bolt that passes through the fixing fitting 7a and is screwed onto the foundation bolt 6.

12 is a stopper fixing ring screwed onto the middle part of the bolt 14, and 10 is a welded part 1 on the fixing fitting 7a.
5 is a gap adjustment adapter welded to the gap adjustment adapter 10 and the stopper fixing ring 12.
The gap adjusting body is tapered from the above, and the gap B formed between the bolt 14 and the fixture 7a is adjusted to a predetermined size by this gap adjusting body.

13 is a stopper penetrated by the bolt 14; 16
is a nut screwed onto the bolt 14; this nut 16 and the stopper fixing ring 12 fix the position of the stopper 13;
A gap C is adjusted to a predetermined size in the axial direction of the bolt 14 formed between the bolt 14 and the bolt 14.

In such a fixing device, vibration from the equipment 1 is always prevented from being transmitted to the foundation 3 by cutting off the vibration edges at the gaps A, B, and C. Also, gaps A, B, and C are small, and if the device 1 is displaced beyond these gaps, the stoppers 13 and spacers 1
Since the device 1 is locked in the first order, locking of the device 1 due to an earthquake is prevented. In addition, even if the sideslip force occurs during an earthquake, excessive bending stress will not be applied to the bolt 14 as in the past, so the bolt 14
The diameter of the can be reduced.

In the above embodiment, the gaps A, B, and C are made up of spaces, but for example, a rubber sheet (not shown), etc., which transmits less vibration, may be inserted into these gaps.
It can also be used as a shock absorber for rocking.

[Effects of the invention] As explained above, the fixing device of the stationary guidance equipment of this invention has three types of fixing devices formed between the foundation and the fixing metal fitting, between the bolt and the fixing metal fitting, and between the fixing metal fitting and the nut. The gap has the effect of preventing the transmission of vibration from the stationary induction equipment to the foundation, and minimizing the locking of the stationary induction equipment due to external forces such as earthquakes. In addition, the bending stress generated in the bolt can be reduced,
This also has the effect of reducing the diameter of the bolt and improving economic efficiency. Furthermore, since a gap adjustment body is provided between the fixing bracket and the bolt, the gap between the fixing bracket and the bolt can be adjusted to the ideal size, which has the effect of more efficiently preventing locking of stationary induction equipment. There is also.

[Brief explanation of the drawing]

Fig. 1 is a general conceptual diagram of a fixing device for stationary guidance equipment, Fig. 2 is a sectional view showing the fixing device in Fig. 1, and Fig. 3 shows a fixing device for static guidance equipment according to an embodiment of this invention. FIG. In the figure, 1 is a device, 3 is a foundation, 7a is a fixture, 10 is a clearance adjustment adapter, 12 is a stopper fixing ring, 14 is a bolt, and 16 is a nut. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A spacer inserted between a fixing metal fitting fixed to a stationary induction device and a foundation and having a predetermined gap between the fixing metal fitting and the fixing metal fitting in a radial direction. a bolt that penetrates the fixing metal fitting and is fixed to the foundation, a stopper fixing ring screwed onto the bolt, a stopper that is inserted and fixed to the bolt while being held by a nut, and the fixing metal fitting. A stationary guide fixed at a predetermined location by welding, and comprising a gap adjustment adapter for adjusting a gap between the lower surface of the stopper and the side surface of the stopper fixing ring to a predetermined size. Equipment fixing device.