JPH071775Y2 - Mounting structure for metal tank embedded base - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure for mounting a metal tank, particularly a soundproof tank covering the periphery of a transformer, to an embedded base.

[Conventional technology]

FIG. 2 is a vertical cross-sectional view of a main part showing an example of a conventional mounting structure of a soundproof tank to an embedded base, in which an outer periphery is a metal wall 3 on an embedded base 2 made of H-shaped steel embedded in a concrete base 1. A soundproof tank 5 having a sound absorbing layer 4 made of concrete or the like is formed on the inner surface, and the embedded base 2 and the lower end portion 3A of the metal wall 3 are attached by welding. The soundproof tank 5 stores ground equipment such as a transformer that needs sound insulation in the inner space 6, and installs a sound absorbing layer 4 on the outer metal wall 3 and the inner surface of the ceiling (not shown) so that the inner sound does not propagate to the outer space 7. After accommodating the above sound-insulating equipment, the soundproof tank 5 is assembled on site and fixed to the embedded base 2 by welding. There is also a method of fixing the embedded base 2 and the soundproof tank 5 only by metal bolts without welding, but if the storage equipment is large and the horizontal width of the soundproof tank becomes more than several meters, it will be buried due to installation errors in the field construction. Since the horizontal position and the position of the insert base 2 are likely to be misaligned, the distortion due to these misalignment is absorbed by welding.

[Problems to be solved by the device]

However, the conventional mounting structure to the embedded base as described above has a drawback that the lower end portion 3A is welded, and thus the welding heat easily causes cracks in the concrete base 1. That is, since it is welded directly to the embedded base 2, thermal stress is generated in the concrete base 1 due to volume expansion due to overheating of the embedded base 2, and this stress causes cracks in the concrete material. In particular, if a crack has occurred inside the concrete base 1, it cannot be found from the outside, so it will not be repaired. If left unattended, it will be damaged by future temperature changes and earthquake vibrations. There is a risk of further progress.

An object of the present invention is to provide a structure for mounting a metal tank on an embedded base so that the concrete base does not crack.

[Means for Solving the Problems]

In order to solve the above problems, according to the present invention, in a structure in which a metal tank having an outer periphery formed of a metal wall is mounted on an embedded base made of a metal material embedded in a concrete base, the embedded base is turned upward. A metal bolt that is fixed so as to project, and has a threaded portion on the top, and a chevron steel that has a through hole for the threaded portion on one side and that is arranged in contact with the metal wall of the metal tank on the other side. The metal bolt is penetrated into the through hole of the thread portion of the chevron steel, the metal nut is fitted into the thread portion to fix the embedded base and the chevron steel, and the other side of the chevron steel is fixed. The end portion and the metal wall are attached by welding.

[Action]

According to the configuration of the present invention, one side of the angle iron and the embedded base are tightened with the metal nut via the screw portion that fixes the embedded base to the embedded base, and the edge of the other side of the angle steel and the metal wall are formed. Since the structure is attached by welding, the angled steel is directly exposed to the welding arc, and the temperature rise of the embedded base is suppressed because the embedded base is not directly exposed to the welding arc, and therefore occurs in the concrete base. Thermal stress is reduced and cracks do not occur in the concrete base.

〔Example〕

 The present invention will be described below based on embodiments.

FIG. 1 is a longitudinal sectional view of a main part showing a mounting structure of a soundproof tank to an embedded base according to an embodiment of the present invention. The metal base 8 is installed on the embedded base 2 so as to project upward from this.
Are welded, and the metal bolt 8 has a screw portion 8A on the top thereof. The angle steel 9 has a through hole 9A of the threaded portion 8A on one side, and the side having the through hole 9A is arranged in contact with the embedded base 2 and the other side is arranged so as to contact the metal wall 3. Has been done. One side of the angle iron 9 and the embedded base 2 have a screw portion 8A.
It is fastened with a metal nut 10 via, and the edge portion 9B of the other side and the metal wall 3 are attached by welding. The same parts as those of the conventional mounting structure to the embedded base are designated by the same reference numerals, and detailed description thereof will be omitted.

In the embodiment configured as described above, it is the angle steel 9 that is directly exposed to the welding arc, and the embedded base 2 is not directly exposed to the welding arc, so the temperature rise of the embedded base 2 is suppressed, and thus The thermal stress in the concrete base 1 is relieved, and no cracks occur in the concrete base. The angle steel 9 has a sufficient heat capacity if the side length is 50 mm or more and the thickness is 4 mm or more.
The temperature rise of the embedded base 2 can be suppressed.

In addition, as a mounting step to the embedded base 2 in FIG. 1, one side of the angle steel 9 and the embedded base 2 are attached to a metal nut.
After tightening at 10, the edge portion 9B and the metal wall 3 are welded to each other, so that the deviation due to the installation error of the embedded base 2 can be absorbed.

Further, although the embodiment of FIG. 1 is a case where the metal tank is a soundproof tank, it can be applied to a mounting structure of another type of metal tank having an outer periphery formed of a metal wall to the embedded base.

[Effect of device]

As described above, the present invention has a structure in which one side of the angle steel and the embedded base are fastened with a metal nut via the screw portion, and the end of the other side of the angle steel and the metal wall are attached by welding. Therefore, the overheating of the embedded base due to the welding heat is alleviated, the concrete base is not cracked, and a highly reliable metal tank mounting structure can be provided.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part showing a mounting structure of a soundproof tank to an embedded base according to an embodiment of the present invention, and FIG. 2 is a main part showing an example of a conventional structure of mounting a soundproof tank to an embedded base. FIG. 1: Concrete base, 2: Embedded base, 3: Metal wall, 3A:
Lower end part, 4: Sound absorbing layer, 5: Soundproof tank, 6: Internal space, 7: External space, 8: Metal bolt, 8A: Screw part, 9: Angle steel, 9A: Through hole, 9B: Edge part, 10 : Metal nut.

Claims (1)

[Scope of utility model registration request] 1. In a structure for mounting a metal tank having an outer periphery formed of a metal wall on an embedded base made of a metal material embedded in a concrete base, the embedded base is fixed so as to project upward, and the top portion is fixed. A metal bolt having a threaded portion on one side, and a chevron steel having a through hole for the threaded portion on one side and arranged in contact with the metal wall of the metal tank on the other side. Penetrating through the through hole of the steel threaded portion, fitting a metal nut into this threaded portion to fix the embedded base and the angle steel, and weld the end of the other side of the angle steel and the metal wall. Mounting structure to the embedded base of the metal tank characterized by being installed by.