JP6997538B2 - Seismic damping device for electric power equipment - Google Patents

Description

The present invention relates to a seismic isolator that protects a power device such as a transformer from seismic motion.

Transformers, also called transformers and transformers, are power equipment for stepping down to 100V or 200V using an electromagnetic induction coil for high voltage such as 6600V supplied by a power company, and are often used in buildings and factories. is set up.
Conventionally, in order to prevent the propagation of vibration generated from the transformer, the transformer is elastically supported by using a vibration-proof material such as vibration-proof rubber. (Refer to Patent Documents 1 and 2)
For example, as shown in FIG. 13A, the transformer 101 is installed on the gantry 100, and the transformer 101 is elastically supported by the anti-vibration rubber or the anti-vibration material 102 such as a spring damper incorporated in the gantry 100 to support the transformer 101. 100 is installed on the floor 103. With this support structure, the transformer 101 is elastically supported on the floor 103, and as a result of the vibration of the transformer 101 being absorbed by the vibration isolator 102, the vibration noise of the transformer 101 is not transmitted to the surroundings.

The gantry 100 having a general anti-vibration function of this kind includes an upper pedestal 100a for installing the transformer 101, a lower pedestal 100b for installing on the floor 103, and a pedestal interposed between the two pedestals. The vibration-proof material 102 is provided, and the vibration generated by the operation of the transformer 101 can be absorbed by the vibration-proof material 102.
However, when a large earthquake or the like occurs, the transformer 101 may sway with an amplitude larger than expected. For example, as shown in FIG. 13B, when the transformer 101 housed inside the cabinet 105 rolls with an amplitude larger than expected, the upper part of the transformer 101 collides with the side wall of the cabinet 105 and the cabinet 105 collides with the side wall of the cabinet 105. There is a risk of damaging the transformer 101 or causing problems with the wiring of the transformer 101.
Therefore, the applicant of the present application first supports the upper part of the transformer by a bolt arm extending in the horizontal direction in the following Patent Documents 3 and 4, and a vibration damping device for a transformer having a configuration in which the bolt arm is supported by an elastic material. is suggesting.

Japanese Unexamined Patent Publication No. 8-8122 Japanese Unexamined Patent Publication No. 2005-251842 Japanese Unexamined Patent Publication No. 2013-21510 Japanese Unexamined Patent Publication No. 2016-001656

In the seismic isolation device described in Patent Documents 3 and 4, a transformer is housed inside a rectangular frame-shaped seismic frame assembled of steel, and a plurality of bolt arms are provided inside the seismic frame via an elastic material. The structure is such that the upper part of the transformer is elastically supported by multiple bolt arms.
Provided is a vibration-reducing device capable of suppressing unexpected rolling of the upper part of the transformer by the vibration-reducing device described in Patent Documents 3 and 4 above, and preventing disconnection or short-circuiting of the upper part of the transformer due to vibration of an earthquake. I was able to.

However, as a result of further research by the inventors of the present application, when the shaking is severe and strong vibration is applied as in the case of the Great East Japan Earthquake, even if the upper part of the transformer is restrained by the bolt arm, the steel material is earthquake resistant. As a result of the large rolling of the upper part of the frame inside the cabinet, it was found that the upper part of the seismic frame could collide with the cabinet. Then, as a result of the vibration test conducted by the inventors of the present application, when the upper part of the seismic frame collides with the cabinet due to a large rolling motion, the cabinet door may be impacted even if the cabinet door is locked depending on the situation. It has been found that there is a risk of opening the cabinet, and that a part of the bottom of the cabinet is deformed so that it rises.

The present invention has been made in view of the above problems, and in a structure in which an electric power device surrounded by a seismic frame is housed in a cabinet, the seismic frame may violently collide with the inner surface of the cabinet even if rolling due to a large earthquake acts. The purpose is to provide a seismic damping device for electric power equipment that can prevent damage and deformation of the cabinet and damage to the electric power equipment.

In order to solve the above problems, in the seismic damping device for electric power equipment of the present invention, a cabinet is configured by providing a peripheral wall, a ceiling wall and a front door in a rectangular three-dimensional frame-shaped cabinet frame, and the inside of the cabinet has a rectangular three-dimensional frame shape. A seismic frame assembled in the seismic frame is installed, and a transformer whose bottom is supported by a vibration-proof pedestal is installed inside the seismic frame, and sideways between the upper part of the transformer and the seismic frame. A plurality of arm members erected via elastic members to restrain and support the upper part of the transformer are provided, and displacement suppression is performed between the upper corner portion of the seismic frame and the cabinet frame adjacent to the upper corner portion of the seismic frame. It is characterized by having a block inserted.

The transformer supported by the anti-vibration pedestal is further elastically supported by a plurality of arm members on its upper portion to prevent it from shaking. Therefore, it is possible to suppress the vibration of the transformer from being transmitted to the outside.
When a large tremor is applied due to an earthquake or the like, the seismic frame that elastically supports the transformer through multiple beams rolls inside the cabinet frame, and the upper part of the seismic frame tries to sway significantly. However, since the displacement suppression block installed at the upper corner of the seismic frame fills the space between the upper part of the seismic frame and the cabinet frame, the upper part of the seismic frame hits the cabinet frame via the displacement suppression block and is stopped from shaking. , The upper part of the seismic frame does not collide violently with the inside of the cabinet frame.

For this reason, even if a large tremor acts on the cabinet accommodating the transformer due to an earthquake or the like, the seismic frame does not give a large impact to the cabinet frame, so the cabinet door opens unexpectedly even in the event of a large earthquake. It will not be stowed, and part of the cabinet will not be deformed or damaged.
The upper part of the seismic frame tries to roll the most due to shaking such as an earthquake, but since the displacement suppression block fills the space between the upper part of the seismic frame and the cabinet frame, it is possible to efficiently suppress the violent shaking of the seismic frame. It is possible to suppress the collision phenomenon of the seismic frame with the cabinet frame.

In the seismic damping device for electric power equipment of the present invention, the displacement suppressing block is a substrate interposed between the seismic frame and the cabinet frame, and side plates erected from at least three sides of the substrate. A bolt-shaped support shaft member that penetrates the substrate in the thickness direction and is slidably movable in the thickness direction of the substrate, and a support shaft member that is screwed into the support shaft member and has the support shaft member with respect to the substrate. A configuration characterized by having a plurality of adjusting nuts for adjusting the insertion position and a foot member attached to one end side of the support shaft member and pressed against the side portion of the cabinet frame facing the substrate can be adopted. ..

The displacement suppression block is configured in the form of a block having at least three side plates around the substrate, and is interposed between the seismic frame and the cabinet frame. Therefore, when one of the side plates is fixed to the seismic frame and a displacement suppression block is inserted between the seismic frame and the cabinet frame, the gap between the seismic frame and the cabinet frame is surely filled with the displacement suppression block. Can be done. If a foot member is provided at one end of the support shaft member that penetrates the substrate, the position of the foot member can be adjusted with the displacement suppression block inserted in the gap between the upper part of the seismic frame and the cabinet frame. The foot member can be pressed against the inner surface of the cabinet frame. In this case, since the gap between the seismic frame and the cabinet frame is closed by a foot member in addition to one of the side plates of the displacement suppression block, the upper side of the seismic frame is displaced regardless of the direction of the cabinet frame due to a large earthquake. The side plate or foot member of the restraining block suppresses the rolling of the seismic frame, and the phenomenon that the upper part of the seismic frame collides violently with the cabinet frame can be prevented.

In the seismic isolation device for electric power equipment of the present invention, the displacement suppression blocks are attached to the upper corners of the seismic frame, and each displacement suppression block presses each foot member against the cabinet frame adjacent to them. It is possible to adopt a configuration in which the adjusting nut on the other end side of each support shaft member is arranged toward the inside of the cabinet.

By providing a displacement suppression block at each of the upper corners of the seismic frame, it is possible to fill the gaps between the upper part of the seismic frame and the cabinet frame in all four directions with the displacement suppression block. Therefore, even if the upper part of the seismic frame sways in any direction due to the shaking of a large earthquake, the impact of the seismic frame colliding with the cabinet frame can be mitigated, so that the cabinet can be prevented from being deformed or damaged. It is possible to suppress the phenomenon that the cabinet door opens. In addition, it is possible to prevent the seismic frame from colliding with the inner surface of the cabinet frame and damaging the cabinet due to the shaking of a large earthquake.

In the vibration damping device for electric power equipment of the present invention, the cabinet frame is a lower part connecting four steel columns, an upper frame material connecting the upper ends of these four columns, and the lower ends of the four columns. The seismic frame is assembled in a rectangular three-dimensional frame shape with a frame material, and the seismic frame is formed of an upper frame member and the four strut members in which four steel strut members and the upper ends of these four strut members are connected. It is assembled in a rectangular three-dimensional frame shape with a lower frame member connected to the lower end portions, and the support column member of the seismic frame is arranged at a position close to the inside of the support column of the cabinet frame, and the displacement suppression is performed at the upper end portion of the support column member. A configuration with a block attached can be adopted.

A strong cabinet frame can be constructed with four steel columns, an upper frame material and a lower frame material, and a strong seismic frame can be constructed with four steel columns, an upper frame member and a lower frame member. can. Even with a strong cabinet frame and earthquake-resistant frame constructed of steel, there is a risk that both frames will partially collide internally due to shaking such as a large earthquake, in which case the displacement suppression block will effectively cause collisions between the two frames. Since it is alleviated, it contributes to the prevention of deformation and damage of the cabinet.

In the vibration damping device for electric power equipment of the present invention, it is preferable that the displacement suppressing block is attached to the upper end portion of the support column member via a thickness adjusting liner.
When attaching the displacement suppression block to the support column member, the gap between the displacement suppression block and the column column of the cabinet can be appropriately filled by attaching the displacement suppression block to the support column member using a liner for adjusting a suitable thickness.

In the seismic damping device for electric power equipment of the present invention, a large tremor is applied due to an earthquake or the like, the upper part of the seismic frame sways inside the cabinet frame, and the upper part of the seismic frame may come into contact with the cabinet frame. In this case, the displacement suppression block installed at the upper corner of the seismic frame alleviates the impact caused by the collision between the upper part of the seismic frame and the cabinet frame.
For this reason, even if a large roll shakes due to an earthquake or the like acts on the cabinet that houses the power equipment such as a transformer, the cabinet door will not open unnecessarily, and a part of the cabinet may be deformed or damaged. do not have.
The upper part of the seismic frame tries to roll the most due to shaking such as an earthquake, but since the displacement suppression block fills the space between the upper part of the seismic frame and the cabinet frame, it is possible to suppress the rolling of the upper part of the seismic frame. , It is possible to prevent a severe collision phenomenon of the upper part of the seismic frame with respect to the cabinet frame.

The front view which shows an example of the transformer storage cabinet to which the vibration damping device for electric power equipment of 1st Embodiment which concerns on this invention is applied. The perspective view which shows an example of the frame of the cabinet, the seismic frame and the transformer (electric power equipment) housed in the cabinet. The perspective view which shows an example of the anti-vibration pedestal on which the transformer is placed. FIG. 3 is a perspective view showing an example of a displacement suppressing block inserted between the corner portion on the upper right side of the seismic frame and the cabinet frame. The perspective view which shows the positional relationship between the corner portion on the upper left side of the seismic frame and the cabinet frame adjacent thereto. The perspective view which shows an example of the displacement suppression block inserted between the corner portion on the upper left side of the seismic frame and the cabinet frame. The plan view which shows the mutual positional relationship of the transformer, the earthquake-resistant frame, and the cabinet frame. Explanatory drawing which shows an example of the positional relationship between the cabinet frame, the seismic frame, and a transformer. The perspective view which shows an example of the said displacement suppression block. The plan view which shows an example of the mounting state of the displacement suppression block. The perspective view which shows an example of the mounting state of the transformer with respect to the seismic frame. The perspective view which shows an example of the vibration test result in the structure which does not have the displacement suppression block. An example of the installation situation of a conventional transformer is shown. (A) is a front view showing a normal state in which the shaking of an earthquake is not acting, and (b) is a front view showing an example of a state in which the shaking of an earthquake is acting. ..

Hereinafter, the vibration damping device for electric power equipment according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 11. In addition, in the drawings used in the following explanation, in order to make the features easy to understand, the featured parts may be enlarged for convenience, and the dimensional ratios of each component may not be the same as the actual ones. do not have.

[First Embodiment]
FIG. 1 shows a cabinet 1 for storing a transformer to which the vibration damping device for electric power equipment according to the first embodiment of the present invention is applied, and the cabinet 1 has a rectangular three-dimensional frame shape as shown in FIG. A peripheral wall 2A composed of left and right side walls and a back wall, a ceiling wall 2B, and front doors 2C and 2C are provided on the outside of the cabinet frame 2. In this embodiment, a double door type door is adopted as the front door 2C, and a lever handle lock 2K is provided in the center of the adjacent portion of the front door 2C.
As shown in FIG. 2, the cabinet frame 2 has four columns 2a made of L-shaped steel, four upper frame members 2b connecting the upper ends of the four columns 2a, and four columns 2a. It is formed in a rectangular three-dimensional frame shape from four lower frame members 2d connected to the lower end portions of the above. The support column 2a is made of an L-shaped steel material in which two strips 2f are integrated into an L-shape at a corner portion 2e.
Of the four columns 2a constituting the cabinet frame 2, the distance between the columns 2a separated in the front-rear direction is smaller than the distance between the columns 2a separated to the left and right. Therefore, the cabinet 1 of this embodiment is formed so that the width on the left and right is larger than the depth on the front and back.

In the cabinet frame 2, each column 2a is arranged so that its corners 2e face the outside of the cabinet 1 and occupy the corners of the four corners of the cabinet 1. Further, with respect to the upper frame material 2b and the lower frame material 2d made of L-shaped steel, the corner portions 2e are arranged facing the outside of the cabinet 1, and these frame materials 2b and 2d and the support column 2a are joined by means of joining such as welding, for example. Is integrated by.
The cabinet 1 is fixed to the floor on which the cabinet 1 is installed by fixing means such as bolting, and a transformer (electric power device) 5 supported by the anti-vibration pedestal 3 is housed on the inner center side of the cabinet 1.

As shown in FIG. 3, the anti-vibration pedestal 3 includes a frame-shaped lower pedestal 3A and an upper pedestal 3B having a rectangular frame in a plan view. These pedestals 3A and 3B each consist of a corner member 6 arranged at each of the four corner portions and a frame frame 7 erected so as to hang between the corner members 6. Stopper bolts 8 are provided so as to partially vertically penetrate the corner members 6 arranged vertically at the corners of the anti-vibration pedestal 3, and the distances between the upper and lower pedestals 3A and 3B are limited.
The corner member 6 is formed in a U-shape composed of an upper plate 6a, a lower plate 6b, and a side plate 6c, and is a stopper that penetrates the lower plate 6b of the corner member 6 located above and the upper plate 6a of the corner member 6 located below. A plurality of regulating nuts 10 are screwed into the bolt 8. The regulating nut 10 is arranged at a position where the lower plate 6b of the upper corner member 6 is sandwiched from above and below and a position where the upper plate 6a of the lower corner member 6 is sandwiched from above and below. By adjusting the screwing position of these restricting nuts 10 with respect to the stopper bolt 8, the distance between the lower pedestal 3A and the upper pedestal 3B is limited.

For example, a stopper bolt 8 slightly longer than the distance between the lower plate 6b of the upper corner member 6 and the upper plate 6a of the lower corner member 6 is provided, and the regulation nuts 10 are attached to the upper and lower ends of the stopper bolt 8. Can be screwed. With this structure, both the upper corner member 6 and the lower corner member 6 are connected via a stopper bolt 8 so as to be separated by a predetermined distance until they hit the upper and lower regulation nuts 10.
In the anti-vibration pedestal 3, a plurality of anti-vibration members 9 made of an elastic body such as a coil spring or an elastic resin are interposed between the upper and lower frame frames 7 and 7. Further, the anti-vibration pedestal 3 is arranged with its long side parallel to the long side of the bottom of the cabinet 1 and is fixed to the floor surface at the center of the bottom of the cabinet 1 by means such as bolting.

In this embodiment, as shown in FIG. 2, the transformer 5 is a three-phase alternating current compatible electric power device, and three coil bodies 5a with windings for electromagnetic induction are arranged in parallel in an upright state to prevent vibration. It is mounted on the gantry 3 by a fixing means such as bolting. In the transformer 5, fixed substrates 5d are provided on the left and right corner sides of the ceiling portion 5b located above the three coil bodies 5a, respectively. Although wiring and wiring equipment for the transformer are provided above the position where the transformer 5 is installed in the cabinet 1, the drawings of the present specification omit the display of these wiring and wiring equipment. ..

Next, a rectangular three-dimensional frame-shaped seismic frame 12 is provided so as to surround the transformer 5 and be located inside the cabinet frame 2.
The seismic frame 12 has a column member 12a made of four L-shaped steel materials, which is arranged slightly inside the column 2a of the cabinet frame 2 and extends to a position slightly higher than the uppermost portion of the transformer 5. .. As shown in FIGS. 4 to 6, the support column member 12a is formed by integrating two strips 12c and 12c into an L shape via a corner portion 12b.
Hereinafter, for convenience of explanation, in the outline of the cabinet 1 shown in FIG. 7, the right side surface is the front surface 1D of the cabinet 1, the left side surface is the back surface 1E of the cabinet 1, the upper side surface is the right side surface 1F of the cabinet 1, and the lower side. The side surface of the cabinet 1 will be described as the left side surface 1G of the cabinet 1.
As shown in FIG. 7, the two support column members 12a erected on the front surface 1D side of the cabinet 1 have one strip 12c so that their corners 12b face the front surface side and the center side of the cabinet 1. Is arranged parallel to the front surface of the cabinet 1, and the other strip 12c is arranged so as to be perpendicular to the front surface of the cabinet 1.
Further, the two support column members 12a erected on the back surface 1E side of the cabinet 1 have one strip 12c of the cabinet 1 so that their corners 12b face the back surface side and the center side of the cabinet 1. The other strip 12c is arranged so as to face the back surface of the cabinet 1 at a right angle to the back surface of the cabinet 1.

As shown in FIG. 2, an upper frame member 12d made of an L-shaped steel material is provided so as to connect the uppermost portions of the two support column members 12a erected on the left side surface side of the cabinet 1, and the right side surface of the cabinet 1 is provided. An upper frame member 12d made of an L-shaped steel material is provided so as to connect the uppermost portions of the two support column members 12a erected on the side. The upper frame member 12d is an L-shaped integrated strip 12f and 12f via a corner portion 12e, and the upper frame member 12d arranged on the left side surface side of the cabinet 1 has a corner portion as shown in FIG. The 12e is integrated with the two strut members 12a on the left side with the left end side of the cabinet 1 facing, one strip 12f horizontally and the other strip 12f vertically. The upper frame member 12d is integrated with the support column member 12a by a joining means such as bolting.
The upper frame member 12d arranged on the right side of the cabinet 1 has two right sides with the corners 12e facing the right end side of the cabinet 1, one strip 12f horizontally and the other strip 12f vertically. It is integrated with the support column member 12a.

As shown in FIG. 2, an upper frame member 12h made of a U-shaped steel material is formed on the outside of the support column member 12a so as to connect a position slightly lower than the uppermost portion of the two support column members 12a arranged on the front surface side of the cabinet 1. Is connected, and an upper frame member 12h made of a U-shaped steel material is provided on the outside of the support member 12a so as to connect a position slightly lower than the uppermost portion of the two support member 12a arranged on the back side of the cabinet 1. Has been done.
As shown in FIG. 2, reinforcing brace members 13 are connected in an X shape to the right side surface side and the left side surface side of the seismic frame 12, respectively, and the central portion of the two column members 12a on the right side of the seismic frame 12 in the height direction. A central frame member 14a for reinforcement is erected on the. A central frame member 14a for reinforcement is also erected at the central portion in the height direction of the two column members 12a on the left side of the seismic frame 12. A bottom frame member 14b for reinforcement is erected on the bottom side of the two support columns 12a on the right side of the seismic frame 12, and a bottom frame member for reinforcement is also erected on the bottom side of the two support columns 12a on the left side of the seismic frame 12. 14b is erected.

A reinforcing inclined frame member erected in a V shape from the bottom of the two left and right support column members 12a arranged on the front side of the cabinet 1 and the central part of the upper frame member 12h on the front side of the cabinet 1. 12i is erected. An inclined frame member 12i is erected at the same position on the back side of the cabinet 1.

Next, as shown in FIGS. 2, 5 to 7, a triangular box frame 15 in a plan view is integrated by a joining means such as welding inside the portion where the support column member 12a and the upper frame member 12h are joined. There is. A support plate 15a is hung downward from the box frame 15, and a rod-shaped arm member 17 for connecting the support plate 15a and the fixed substrate 5d on the upper part of the transformer 5 is provided. An annular connecting ring 17a is formed on one end side of the arm member 17, and a perforated columnar elastic body 17b is inserted on the other end side.

The support plate 15a extends downward from the box frame 15, and the lower portion of the support plate 15a is arranged at the same height as the fixed substrate 5d of the transformer 5 located inside the support plate 15a.
As shown in FIGS. 7 and 11, the connection bolt 18 is screwed into the screw hole (not shown) formed in the corner portion of the fixed board 5d in the transformer 5, and the upper end portion of the connection bolt 18 is moved upward from the fixed board 5d. It is projected by a predetermined length.
The connection ring 17a of the arm member 17 is connected to the protruding portion of the connection bolt of the fixed substrate 5d, and the other end side of the arm member 17 passes through the through hole formed in the support plate 15a of the box frame 15 and is on the lower side of the box frame 15. An elastic body 17b is attached to the extended portion via a flange plate or a nut (not shown). A nut member 17c is screwed to a screw shaft portion formed on the other end side of the arm member 17, and tension can be applied to the arm member 17 by adjusting the screwing position of the nut member 17c. , A tensile force is applied so as to attract the transformer 5 to the box frame 15 side via the connecting bolt 18.

Connection bolts 18 are erected at each of the four corners of the ceiling 5b of the transformer 5, and box frames 15 are arranged on the outside of each of the four corners of the ceiling 5b. Four arm members 17 are arranged so as to connect the frame 15 and the connection bolt 18. As shown in FIG. 7, the four arm members 17 are arranged radially so as to surround the plan view transformer 5. By supporting the upper side of the transformer 5 by the arm members 17 arranged radially and horizontally, the transformer 5 is supported by being prevented from shaking in the horizontal direction. Further, in the arm member 17, an elastic body 17b is provided on the box frame 15 side, and the arm member 17 supports the upper part of the transformer 5 via the elastic body 17b, so that the upper part of the transformer 5 has four pieces. It is elastically supported by the arm member 17.

Next, the displacement suppression block 20 described below is attached to each of the upper end side corner portions of the seismic frame 12. That is, in the seismic frame 12, the displacement suppression block 20 is attached to the portion between the upper end portion of each support column member 12a and the cabinet frame 2 located outside the upper end portion.
As shown in FIGS. 4, 6, and 9, the displacement suppression block 20 is formed in a block shape including a rectangular substrate 20a and side plates 20b erected from three peripheral portions of the substrate 20a, and is formed in a block shape. In, a screw hole 20c is formed that penetrates a portion close to the peripheral portion on the side where the side plate 20b is not provided in the thickness direction, and a bolt-type support shaft member 21 is screwed into the screw hole 20c.

The support shaft member 21 is formed to be slightly longer than the height of the side plate 20b, and a mushroom-shaped foot member 25 is provided on one end side in the length direction of the support shaft member 21 (the end on the side extending along the side plate 20b). The adjustment nut 26 is integrated and screwed into the other end side (the side where the side plate 20a is not provided) of the support shaft member 21 in the length direction. Further, the adjusting nut 27 is also screwed into the portion between the portion where the support shaft member 21 penetrates the substrate 20a and the foot member 25.
By rotating the support shaft member 21 inserted into the screw hole 20c of the substrate 20a, the screw hole passing position of the support shaft member 21 can be changed, thereby changing the protruding position of the foot member 21 with respect to the substrate 20a. Can be done. The positions of the adjusting nuts 26 and 27 are adjusted so as to sandwich the position where the screw hole 20c is inserted in the support shaft member 21, and the substrate 20a is sandwiched between the adjusting nuts 26 and 27 to finally position the support shaft member 21. The position of the foot member 25 can be fixed by going. As shown in FIGS. 9 and 10, it is preferable that a damper 25a made of an elastic plate is attached to the outer surface of the foot member 25.

Of the three side plates 20a in the displacement suppression block 20, two insertion holes 20d are formed at a distance from each other in the central side plate 20a. Further, as shown in FIG. 5, two through holes 12g are formed in a portion where the displacement suppressing block 20 should be fixed at the upper end portion of the support column member 12a of the seismic frame 12. The substrate 20a in the center of the displacement suppression block 20 is brought into contact with the upper end of the support column member of the seismic frame to align the through hole 12g and the insertion hole 20d, and as shown in FIG. 10, the upper end portion of the substrate 20a and the support column member 12a is aligned. An appropriate thickness adjusting liner 28 is sandwiched between the two, and the displacement suppressing block 20 is attached to the upper end portion of the support column member 12a by a bolt 29 penetrating through these through holes.

FIG. 7 summarizes the mounting states of the displacement suppression blocks 20 fixed to the four corners of the seismic frame 12.
In the cabinet 1, the two left and right support column members 12a located on the front surface 1D side are all made of L-shaped steel material, and their corner portions 12b are directed to the front surface side and the center side of the cabinet 1. Therefore, as shown in FIG. 7, the displacement suppressing block 20 attached to the support column member 12a on the front left side of the cabinet 1 (lower side of the front surface 1D in FIG. 7) has the foot member 25 on the front left side of the cabinet 1 (FIG. 7). 7 is arranged toward the lower side), and the foot member 25 is pressed against the strip 2f of the support column 2a on the left corner side of the cabinet 1. Further, in the displacement suppressing block 20 attached to the support column member 12a on the front right side of the cabinet 1 (upper side of the front surface 1D in FIG. 7), the foot member 25 is arranged toward the right side of the cabinet 1 (upper side in FIG. 7). The foot member 25 is pressed against the strip 2f of the support column 2a on the right corner side (upper right side in FIG. 7) of the cabinet 1.

As shown in FIG. 7, the displacement suppressing block 20 attached to the support column member 12a on the left side of the back surface of the cabinet 1 (lower side of the back surface 1E in FIG. 7) has the foot member 25 on the left side of the cabinet 1 (rear surface 1E in FIG. 7). The foot member 25 is arranged toward the lower side) and is pressed against the strip 2f of the support column 2a on the left back corner side of the cabinet 1. Further, the displacement suppressing block 20 attached to the support column member 12a on the right side of the back surface of the cabinet 1 (upper side of the back surface 1E in FIG. 7) directs the foot member 25 toward the right side of the cabinet 1 (upper side of the back surface 1E in FIG. 7). The foot member 25 is pressed against the strip 2f of the support column 2a on the right back corner side of the cabinet 1.

On the other hand, the displacement suppressing block 20 is attached to the upper end portion of each support column member 12a via the adjusting liner 28. By adjusting the thickness of the adjusting liner 28 to an appropriate thickness, the side plates 20a and 20a of the displacement suppressing block 20 attached to the upper end of the column member are positioned so as to come into contact with the inner surface of the strip 2b of the cabinet frame 2. It can be adjusted so that the displacement suppression block 20 is positioned in the proper position. By adjusting the position of the foot member 25 and adjusting the position of the displacement suppressing block 20 by the adjusting liner 28, the gap between the support column member 12a and the cabinet frame 2 can be reliably closed by the displacement suppressing block 20.
FIG. 8 is a schematic diagram showing an outline of a state in which the displacement suppression block 20 is provided so as to fill the space between the support column 2a and the support column member 12a, and an outline of a state in which the arm member 17 elastically supports the upper portion of the transformer 5. Keep it.

In the cabinet 1 having the structure described above, since the transformer 5 is elastically supported by the anti-vibration pedestal 3, the vibration-proof member 9 of the anti-vibration pedestal 3 absorbs the vibration generated in the transformer 5 to the outside of the cabinet 1. Vibration and noise from the transformer 5 are not transmitted.
Further, since the separation distance between the lower pedestal 3A and the upper pedestal 3B can be limited by the action of the stopper bolt 8 provided at the corner portion of the anti-vibration pedestal 3 and the regulation nut 10, the transformer 5 sways slightly due to an earthquake or the like. Even if this happens, the upper limit of the inclination of the transformer 5 can be regulated within a certain angle. Therefore, it is possible to provide a structure having a small inclination generated in the transformer 5 even when the transformer 5 is subjected to a slight rolling motion due to an earthquake.
Further, in the cabinet 1, since the upper part of the transformer 5 is elastically supported by the arm member 17 provided laterally via the elastic member 17b, the transformer 5 is transformed even if a slight rolling motion occurs due to an earthquake or the like. The vessel 5 does not sway significantly.

Next, in the cabinet 1 having the above configuration, when a strong shaking acts due to a large earthquake, the cabinet frame 2 may roll and the seismic frame 12 may also roll.
In this case, the seismic frame 12 elastically supporting the transformer 5 via the plurality of arm members 17 rolls inside the cabinet frame 2, and the upper part of the seismic frame 12 tends to roll the most. However, since the displacement suppression block 20 installed at the upper end corner portion of the seismic frame 12 fills the space between the upper part of the seismic frame 12 and the cabinet frame 2 as shown in FIGS. 7 and 8, the seismic frame 12 As a result of the upper part hitting the cabinet frame 2 via the displacement suppressing block 20 and being stopped from shaking, the phenomenon that the upper part of the seismic frame 12 violently collides with the inside of the cabinet frame 2 does not occur.
Therefore, even if a large earthquake occurs, the seismic frame 12 does not give a large impact to the cabinet 1, so that the front door 2C does not open unexpectedly, and the cabinet 1 caused by the collision of the seismic frame 12 does not occur. It is possible to provide a cabinet 1 that does not cause damage or deformation.
Further, since the displacement suppression block 20 can suppress the shaking of the upper part of the seismic frame 12, it is possible to prevent the wiring existing on the upper side of the transformer 5 from being broken or the portion around the wiring to be damaged.

The displacement suppression block 20 having the above-described configuration is configured in a block shape having at least three side plates 20b around the substrate 20a, and is interposed between the seismic frame 12 and the cabinet frame 2. Therefore, when any of the side plates 20b is fixed to the seismic frame 12 and the displacement suppression block 20 is inserted between the seismic frame 12 and the cabinet frame 2, the gap between the seismic frame 12 and the cabinet frame 2 is displaced. It can be reliably filled with the suppression block 20.

By providing four displacement suppression blocks 20 in accordance with each of the upper corners of the seismic frame 12, all the gaps around the upper four corners of the seismic frame 12 can be filled with the displacement suppression blocks 20. Therefore, even if the upper part of the seismic frame 12 rolls in any direction due to the shaking of a large earthquake, the impact of the seismic frame 12 colliding with the cabinet frame 2 can be mitigated, so that the cabinet 1 can be prevented from being deformed or damaged. It is possible to suppress the phenomenon that the front door 2C of the cabinet 1 is opened due to the shaking of the earthquake.
Further, in the displacement suppressing block 20, since the foot member 25 is provided at one end of the support shaft member 21 penetrating the substrate 20a, the displacement suppressing block 20 is inserted in the gap between the upper part of the seismic frame 12 and the cabinet frame 2. The position of the foot member 25 can be adjusted in this state, and the foot member 25 can be reliably pressed against the inner surface of the cabinet frame 2.

In this case, since the gap between the seismic frame 12 and the cabinet frame 2 is closed by the foot member 25 in addition to one of the side plates 20b of the displacement suppressing block 20, the upper side of the seismic frame 12 is lateral in the cabinet frame 2 in any direction. Even if it shakes, the side plate 20b or the foot member 25 of the displacement suppressing block 20 suppresses the rolling of the seismic frame 12, and the phenomenon that the upper part of the seismic frame 12 violently collides with the cabinet frame 2 can be prevented.

If the cabinet 1 has the above-mentioned configuration, a strong cabinet frame 2 can be constructed by the four columns 2a made of L-shaped steel, the upper frame material 2b, and the lower frame material 2d, and the cabinet 1 made of L-shaped steel 4 can be constructed. A strong seismic frame 12 can be constructed by the support column member 12a of the book, the upper frame member 12d, and the lower frame member 14b. Even with the strong cabinet frame 2 and seismic frame 12 constructed of L-shaped steel, there is a risk that both frames may partially collide internally due to shaking such as a large earthquake, in which case the displacement suppression block 20 is effective. Since the collision between the two frames is mitigated, it contributes to the prevention of deformation and damage of the cabinet 1.

In the cabinet 1 having the above-described configuration, the displacement suppression blocks 20 are attached to the four corners of the upper part of the seismic frame, the side plates 20b of the displacement suppression block 20 are brought into contact with the inner surface of the cabinet frame 2, and the foot member 25 is attached to the cabinet. It is preferable to press it against the inner surface of the frame 2.
In order to bring the side plate 20 of the displacement suppressing block 20 into contact with the inner surface of the cabinet frame 2, it can be adjusted by adjusting the thickness of the adjusting liner 28 when bolting the displacement suppressing block 20 to the upper end portion of the support column member 12a. Further, in the displacement suppression block 20, the position of the foot member 25 can be adjusted by adjusting the position of the support shaft member 21.

Here, as shown in FIG. 7, in the plan view of the cabinet 1, the foot member 25 of the two displacement suppression blocks 20 on the right side (upper side in FIG. 7) of the cabinet 1 faces to the right (upward in FIG. 7) and the left side of the cabinet 1 (upper side). By arranging the foot members 25 of the two displacement suppression blocks 20 facing left (downward in FIG. 7) (lower side in FIG. 7), the position of each foot member 25 can be easily adjusted.
In order to adjust the position of the foot member 25, it is necessary to adjust the position of the support shaft member 21 of each displacement suppressing block 20, but in the arrangement shown in FIG. 7, the support shaft member 21 for positioning the support shaft member 21 is used. The end position and the adjusting nut 26 can be arranged toward the center of the cabinet 1. Therefore, the operator can adjust the position of the support shaft member 21 and tighten the adjusting nut 26 in a comfortable working posture by utilizing the empty space on the center side of the cabinet 1.
On the other hand, when the orientation of the support shaft member 21 and the position of the adjusting nut 26 are from the side wall of the cabinet 1 or toward the back side, it becomes difficult to secure a space for tightening the nuts, or the working posture is poor. Therefore, the mounting and adjusting work of the displacement suppressing block 20 becomes difficult.

"Test example"
A cabinet having a cabinet frame having a height of 2350 mm, a width of 1600 mm, and a depth of 1000 mm, which was assembled into a rectangular three-dimensional shape by welding from an L-shaped steel plate having a width of 50 mm on a side, was prepared. The cabinet frame is fitted with steel side walls, a ceiling wall and a double-door front wall. The front door is equipped with a lockable lever handle type opening / closing mechanism and a key.
This cabinet frame is bolted to the iron base of the vibration isolator, and inside it is a vibration isolation stand with a width of 1060 mm, a depth of 650 mm, and a height of 209 mm (trade name manufactured by Patent Equipment Co., Ltd., OS type vibration isolation device OMT- K11029) was installed, and a transformer with a width of 1130 mm, a height of 1135 mm, a depth of 645 mm, and a weight of 1360 kg was installed on the anti-vibration stand by bolting.

A strut member made of an L-shaped steel plate having a width of 60 mm on each side around the transformer, an upper frame member, a lower frame member, a lower brace member, and an inclined brace member. The seismic frame was constructed by bolting each part, and was placed inside the cabinet so as to surround the transformer. The bottom of the seismic frame was bolted to a concrete base.
An upper frame member made of a U-shaped steel plate with a width of 175 mm and a side wall height of 1400 mm is bolted to the upper front side and the upper back side of the seismic frame, and holes are provided in the box frame provided at the intersection of the upper frame material and the support member. Four upper corners of the transformer were suppressed by four arm members with a length of 300 mm via a rubber bullet body with a hollow column.
One end of a support shaft member with a length of 63 mm that penetrates the screw holes of the board using a displacement suppression block in which side plates with a height of 1650 mm are erected on three sides of a board made of steel plates with a thickness of 5 mm, a length of 96 mm, and a width of 50 mm. Was provided with a disk-shaped foot member having a diameter of 40 mm. A rubber damper with a thickness of 6 mm was attached to the surface of the foot member.
Using four displacement suppression blocks, the gap between the uppermost part of the seismic frame and the cabinet frame around it was filled to form the cabinet of the embodiment.

The cabinet of this example was installed on a shaking table, and a vibration test was conducted in which a vibration corresponding to an earthquake with a seismic intensity of 7 was applied for 140 seconds.
As a result, the locked state of the front door was maintained, and no damage or deformation was observed in each part of the cabinet.

"Comparison example"
A cabinet equivalent to that of the embodiment was configured except that the cabinet was not provided with a displacement suppression block, and a vibration test was performed in which vibration corresponding to a seismic intensity of 7 was applied for 140 seconds under the same conditions as the above test.
The result is shown in FIG. 12, although the lever handle lock on the front door of the cabinet was locked, the key was released and released, and a deformed portion was generated at the bottom of the left wall of the cabinet. In FIG. 12, the description of the transformer housed inside the cabinet is omitted, and only the outline of the cabinet is shown.
From the above comparison, it was possible to confirm the effect of improving the seismic resistance of the structure in which the displacement suppression block is provided in the cabinet provided with the seismic frame inside and the gap between the seismic frame and the cabinet frame is filled. In addition, if a displacement suppression block is not provided, when a large earthquake occurs, the key will come off due to deformation of the hook part and the front door will open even though it is locked with a lever handle type hook lock. It was also found that the impact could be loaded onto the cabinet frame from the transformer and seismic frame.

1 ... Cabinet, 2 ... Cabinet frame, 2A ... Circumferential wall, 2a ... Support, 2B ... Ceiling wall, 2C ... Front door, 3 ... Anti-vibration stand, 3A ... Lower stand, 3B ... Upper stand, 5 ... Transformer (electric power equipment) ), 5a ... Coil body, 5d ... Fixed substrate, 6 ... Corner member, 7 ... Frame frame, 8 ... Stopper bolt, 12 ... Seismic frame, 12a ... Support member, 12c ... Strip plate, 12d, 12h ... Upper frame member, 15 ... Box frame, 15a ... Support plate, 17 ... Arm member, 17b ... Elastic body, 18 ... Connection bolt, 20 ... Displacement suppression block, 20a ... Board, 20b ... Side plate, 20c ... Screw hole, 21 ... Support shaft member, 25 ... Foot member, 26, 27 ... Adjustment nut, 28 ... Thickness adjustment liner.

Claims (5)

A cabinet is configured with a peripheral wall, a ceiling wall, and a front door on a rectangular three-dimensional frame-shaped cabinet frame, and a seismic frame assembled in a rectangular three-dimensional frame shape is installed inside the cabinet, and the bottom is placed inside the seismic frame. Power equipment supported by the anti-vibration stand is installed, and at the same time,
A plurality of arm members are provided laterally between the upper part of the electric power device and the seismic frame and erected via an elastic member to restrain and support the upper part of the electric power device.
A seismic damping device for electric power equipment, characterized in that a displacement suppression block is interposed between the upper corner portion of the seismic frame and the cabinet frame adjacent to the upper corner portion of the seismic frame. The displacement suppressing block penetrates the substrate interposed between the seismic frame and the cabinet frame, the side plates erected from at least three sides of the substrate, and the substrate in the thickness direction. A bolt-shaped support shaft member provided so as to be slidable in the thickness direction of the substrate, and a plurality of adjusting nuts screwed onto the support shaft member to adjust the insertion position of the support shaft member with respect to the board. The vibration damping device for an electric power device according to claim 1, further comprising a foot member attached to one end side of the support shaft member and pressed against a side portion of the cabinet frame facing the substrate. The displacement suppression blocks are attached to the upper corners of the seismic frame, and each displacement suppression block presses each foot member against the cabinet frame adjacent to them, and an adjustment nut on the other end side of each support shaft member. 2. The seismic damping device for electric power equipment according to claim 2, wherein is arranged toward the inside of the cabinet. The cabinet frame is assembled in a rectangular three-dimensional frame shape with four steel columns, an upper frame material connecting the upper ends of these four columns, and a lower frame material connecting the lower ends of the four columns. Rare,
The seismic frame is a rectangular solid with four steel column members, an upper frame member connecting the upper ends of these four column members, and a lower frame member connecting the lower ends of the four column members. Assembled in a frame,
3. Seismic damping device for electric power equipment according to any one. The vibration damping device for electric power equipment according to claim 4, wherein the displacement suppressing block is attached to an upper end portion of the support column member via a thickness adjusting liner.

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