JPH05311925A - Damping supporter for tower-shaped structure - Google Patents

Abstract

PURPOSE:To support a tower-shaped structure such as a large-sized bushing in an earthquake-proof manner. CONSTITUTION:A support section 55 is installed to the lower section of a large- sized bushing so as to be spread toward the outside. A horizontal support base 56 is fixed onto the ground while being positioned at the lower section of the bushing. A plurality of vertical damping devices 1 for supporting the bushing are interposed between the support base 56 and the support section 55. Rods 2 and frame bodies 3 mutually expanded and contracted in the vertical direction are mounted to the damping devices 1, the lower end sides of the frame bodies 3 are fixed onto the support base 56, and the upper end sides of the rods 2 are bonded with the support section 55. Springs 4 supporting the load of the bushing and plastic deformation type damper mechanisms 5 resisting expansion and contraction movement between both the rods and the frame bodies and preventing the resonance of the bushing 51 are set up among the rods 2 and the frame bodies 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping support device for supporting a tower-like structure such as a large bushing in a power plant or a substation in a seismic resistant manner.

[0002]

2. Description of the Related Art Large bushings in power plants and substations are fixed directly or indirectly on the ground. Since the bushing insulator has little plastic deformation, it is difficult to alleviate the stress caused by vibration such as an earthquake, and it collapses if the allowable stress is exceeded. For example, the height of a bushing or the like for drawing the terminals of a circuit breaker installed in a substation to the outside ranges from several meters to several tens of meters. If a bushing of 10 meters or more is fixed to the ground as in the past, there is a great risk of collapse due to an earthquake.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vibration damping support device capable of supporting a tower-like structure such as a large bushing in a seismic resistant manner.

[0004]

In the present invention, in order to solve the above-mentioned problems, a supporting portion 55 is provided at the lower part of a tower-like structure such as a large bushing 51 so as to spread outward, and this tower-like structure is provided. A horizontal support 56 is fixed to the ground below the object 51, and the support 56 and the tower structure 5
1. A plurality of vertical vibration damping devices 1 for supporting the tower-shaped structure 51 are provided between the supporting member 55 and the support portion 55, and the rods 2 that extend and contract in the vertical direction are provided in the vibration damping device 1. And a pair of upper and lower support members such as the frame body 3, the lower end side of the lower support member 3 is fixed on the support base 56, the upper end side of the upper support member 2 is coupled to the support portion 55, and the upper and lower support members. A spring 4 for supporting the load of the tower-shaped structure 51 and a plastic deformation damper mechanism 5 for damping vibration by plastic deformation accompanying expansion and contraction between the upper and lower support members 2, 3 are provided between the second and third parts. A vibration damping support device for a tower structure was constructed.

Then, for example, the lower support member 3 of the vibration damping device 1 is composed of a frame body fixed vertically to the support base 56, and the upper support member 2 of the vibration damping device 1 is arranged vertically to the frame body 3. Consists of a rod 2 inserted in and out, and a frame 3
Is provided with an upper support plate 6, a lower support plate 7, and a connecting member such as a tie rod 8 that connects the upper and lower support plates 6 and 7 in parallel with a space therebetween, and the rod 2 is a frame body. Three
The upper and lower support plates 6 and 7 of the
In addition, a spring 4 for always holding the rod 2 in the upper and lower neutral positions is provided in the frame body 3, and between the lower support plate 7 and the rod 2 is a vertical relative direction between the frame body 3 and the rod 2. They are connected by a plurality of plastic plates 14 that plastically deform as they move. Further, for example, the plastic plates 14 are arranged below the lower support plate 7 in a radial pattern centering around the rods 2, and the inner end portions of the plastic plates 14 are a pair of upper and lower flange portions of the rod 2 protruding downward from the lower support plate 7. It is clamped by 2b and 2c, and the outer end is clamped by the lower support plate 7 and the pressing ring 17 provided below it.

[0007]

In the vibration damping support device of the present invention, the vibration damping device 1
The spring 4 always supports the vertical load of the tower-shaped structure 51. When the tower-shaped structure 51 such as a large bushing sways due to an earthquake, the vibration damping device 1 is compressed or stretched via the upper support member 2 connected to the support 55. Resistance to the expansion and contraction of the upper and lower support members 2 and 3 is imparted by the spring 4 and the plastic deformation damper mechanism 5, and the tower structure 51 is damped. With the vibration damping device 1,
The stress on the tower-shaped structure 51 is relieved, and collapse is prevented.

That is, by the spring 4 of the vibration damping device 1,
The vertical load of the tower structure 51 is supported. When the tower-shaped structure 51 tries to shake due to an earthquake, the rod 2 connected to one side of the support portion 55 is pushed downward into the momentary frame 3 and the rod 2 connected to the opposite side is pushed. The frame 3 is pulled out upward. This operation is repeated as the vibration continues.

When the rod 2 is pushed down, the spring 4 in the frame 3 is compressed from top to bottom. At this time, the plastic plate 14
Bends and deforms so that the inner side of the rod lowers downward, and the energy of relative motion between the rod 2 and the frame 3 is converted into heat energy due to friction between metal atoms and consumed to damp vibration. Vibration is suppressed by the damping force of the plastic deformation type damper mechanism 5 and the spring force of the spring 4.

On the other hand, when the rod 2 is pulled upward from the frame body 3, the spring 4 is compressed from the bottom to the top, and the piston 18 rises. At this time, the inside of the plastic plate 14 is deformed so as to rise upward. Then, similarly to the above, the vibration of the bushing 51 is suppressed by the damping force of the vibration accompanying the plastic deformation of the plastic plate 14 and the spring force of the spring 4. In this way, the vibration damping device 1 alleviates the stress on the tower bushing 51 and prevents collapse.

[0011]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of a vibration damping support device supporting a circuit breaker bushing, FIG. 2 is a schematic front view of a part of a vibration damping support device supporting a circuit breaker bushing, and FIG. 3 is a III-III line in FIG. Sectional view, FIG. 4 is a vertical sectional front view of the vibration damping device, FIG.
6 is a bottom view of the vibration damping device, FIG. 6 is a plan view of the plastic plate, and FIG. 7 is a sectional view taken along line VII-VII in FIG.

In FIGS. 1 to 3, a bushing 51 for a circuit breaker, which is a tower-like structure, has an insulating gas tank 52 fixed on the ground, and a porcelain tube 53 flexibly coupled thereto.
It is equipped with. The porcelain insulator 53 communicates with the gas tank 52 via a bellows 54, and a conductor 58 penetrates inside. A support portion 55 that spreads outward is fixed to the lower portion of the porcelain insulator 53. Below the support portion 55, a horizontal support base 56 is fixed to the ground via legs 57.

Between the support base 56 and the support portion 55,
A plurality of vibration damping devices 1 for supporting the porcelain insulator 53 are provided. As shown in FIG. 2, the vibration damping device 1 includes a frame body 3 serving as a lower support member and a rod 2 serving as an upper support member, and the upper and lower support members 2 and 3 are vertically extendable. As shown in FIG. 1, the vibration damping device 1 includes a spring 4 that supports the load of the porcelain bushing 53, and a plastic deformation damper mechanism 5 that damps expansion and contraction.

Next, the vibration damping device 1 will be described in more detail. The frame 3 as a lower support member of the vibration damping device 1 includes an upper support plate 6, a lower support plate 7, and upper and lower support plates 6 and 7 thereof.
It has a plurality of tie rods 8 which are connecting members that connect the two in parallel with each other with a space. The upper support plate 6 has a circular shape and has a hole 6a in the center through which the rod 2 passes. The lower support plate 7 is also circular, and has a hole 7a at the center for the rod 2 to pass through.
The tie rods 8 are arranged side by side in a ring shape. The outer side of the tie rod 8 is covered with a cylindrical cover 9.

The rod 2 is connected to the support portion 55 via the attachment portion 2a at the upper end, and penetrates the upper and lower support plates 6 and 7 of the frame body 3 in a vertically movable manner. And rod 2
Is always held at the upper and lower neutral positions by the disc spring 4 provided in the frame body 3. An upper flange portion 2b is provided at an intermediate portion of the rod 2, and a disc spring 4 is provided in the frame body 3 between the upper flange portion 2b and the lower end portion of the mounting portion 2a. .. That is, a spring bearing ring 11 is fitted vertically below the lower end of the mounting portion 2a, and a spring bearing ring 12 is fitted vertically above the upper collar portion 2b. There is. The upper surface of the spring bearing ring 11 contacts the lower end surface of the mounting portion 2a and the lower end surface of the upper support plate 6, and the lower surface thereof contacts the disc spring 4. The lower surface of the spring bearing ring 12 abuts on the upper end surface of the collar portion 2b and the upper end surface of the lower support plate 7, and the lower surface thereof abuts on the disc spring 4. The disc springs 4 are arranged so as to abut against each other in the vertical direction, and are normally assembled with a predetermined preload so as to hold the rod 2 in the vertical position by the restoring force. A ring 13 is provided between the upper and lower disc springs 4, 4. The lower end of the rod 2 is provided with a lower flange 2c for sandwiching the inner end of the plastic plate 14 with the upper flange 2b.

The plastic deformation type damper mechanism 5 is composed of a plurality of plastic plates 14 connecting the lower support plate 7 and the rod 2. The plastic plate 14 can be plastically deformed as the frame 3 and the rod 2 move relative to each other in the vertical direction. A plurality of plastic plates 14 are arranged below the lower support plate 7 in a plurality of stages, and in a plurality of stages, each stage is radially arranged around the rod 2. The plastic plate 14 is formed in a substantially triangular shape so that uniform plastic deformation can be obtained, and the plastic plate 14 is arranged with its upper part facing inward. A pair of bolt insertion holes 14 a is provided at the outer end of the plastic plate 14. In addition, the plastic plate 14
The inner end of the contact 14 has a semi-cylindrical contact 14 on both upper and lower surfaces.
b is fixed. Then, the bolts 15 vertically penetrate through the bolt insertion holes 14a of the plastic plate 14, which are vertically overlapped with each other, and are screwed onto the lower support plate 7 at the upper end. A spacer 16 is provided between the upper and lower plastic plates 14 to keep an appropriate distance therebetween. A pressing ring 17 is superposed on the lower surface of the lowermost plastic plate 14, and the plastic plate 14 is tightened by a nut 18 screwed to the lower end of a bolt 15 penetrating the pressing ring 17. The inner end of each plastic plate 14 has a spacer 19 between the upper and lower parts.
And is sandwiched between the upper and lower collar portions 2b and 2c.

In the vibration damping support device of this embodiment, the vertical load of the bushing 51 is always supported by the spring 4 of the vibration damping device 1. The spring 4 is incorporated with a preload capable of supporting the vertical load of the bushing 51. When the bushing 51 tries to shake due to an earthquake, the support portion 55
The rod 2 connected to one side of is pushed downward into the instantaneous frame body 3, and the rod 2 connected to the opposite side is pulled out upward from the frame body 3. This operation is repeated as the vibration continues.

When the rod 2 is pushed down, the disc springs 4 in the frame 3 are compressed from top to bottom. At this time, the plastic plate 1
The inside of 4 is bent and deformed downward, and the kinetic energy of vibration is converted into heat energy due to friction between metal atoms. The damping force of the vibration by the plastic deformation type damper mechanism 5 and the spring force of the disc spring 4 suppress the vibration. Plastic plate 1
4 is a bushing 51 elastically supported by the spring 4.
The vibration is damped without causing resonance. Further, the plastic plate 14 reaches the plastic region almost at the same time over the entire region due to its shape. Further, since the inner end is sandwiched between the upper and lower flanges 2b and 2c via the contactor 14b, a secondary moment due to restraint does not occur.

On the other hand, when the rod 2 is pulled out from the frame 3, the disc spring 4 is compressed from the bottom to the top. At this time, the inside of the plastic plate 14 is deformed so as to rise upward. Then, similarly to the above, the bushing 51 is formed by the damping force of the vibration accompanying the plastic deformation of the plastic plate and the spring force of the spring 4.
Suppress the vibration of. In this way, the vibration damping device 1 alleviates the stress on the tower bushing 51 and prevents collapse.

[0020]

As described above, according to the present invention, the support portion 55 is provided below the tower-like structure such as the large bushing 51 so as to spread outward, and is positioned below the tower-like structure 51. Then, the horizontal support 56 is fixed to the ground, and a plurality of vertical vibration dampers for supporting the tower-shaped structure 51 are provided between the support 56 and the supporting portion 55 of the tower-shaped structure 51. The vibration damping device 1 is provided with a pair of upper and lower support members such as a rod 2 and a frame 3 which extend and contract in the vertical direction, and the lower end side of the lower support member 3 is mounted on a support base 56. The upper support member 2 is connected to the support portion 55 at the upper end side, and the spring 4 supporting the load of the tower-shaped structure 51 and the upper and lower support members 2 and 3 are provided between the upper and lower support members 2 and 3. And a plastic deformation type damper mechanism 5 for damping expansion and contraction between the tower structure 5
Since the vibration damping support device of No. 1 is configured, when, for example, an external force due to an earthquake acts on the tower-shaped structure 51, the spring 4 deforms to elastically support the tower-shaped structure 51 and relax the generated stress.
The plastic deformation damper mechanism 5 effectively damps the vibration of the elastically-supported tower-shaped structure 51 without causing it to resonate. Therefore, it is possible to increase the size of the tower-shaped structure 51 such as stone, concrete, or ceramic, which cannot be increased in size by the conventional installation method of fixing the tower-shaped structure 51.

[Brief description of drawings]

FIG. 1 is a schematic front view of a vibration damping support device that supports a bushing for a circuit breaker.

FIG. 2 is a schematic front view of a part of a vibration damping support device that supports a bushing for a circuit breaker.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a vertical sectional front view of the vibration damping device.

FIG. 5 is a bottom view of the vibration damping device.

FIG. 6 is a plan view of a plastic plate.

7 is a sectional view taken along line VII-VII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Damping device 2 Rod (upper support member) 2b Upper flange part 2c Lower flange part 3 Frame (lower support member) 4 Spring 5 Plastic deformation type damper mechanism 6 Upper support plate 7 Lower support plate 8 Tie rod (connecting member) 14 Plastic plate 15 Bolt 17 Holding ring 18 Nut 51 Bushing (tower structure) 55 Support 56 Support

Claims (5)

[Claims] 1. A support portion provided at the lower part of the tower-shaped structure so as to spread outward, a horizontal support base located below the tower-shaped structure and fixed to the ground, and this support base. And a plurality of vertical damping devices for supporting the tower-shaped structure on a support table, the damping devices being respectively installed in the vertical direction. A pair of upper and lower support members that expand and contract in a vertical direction, the lower end side of the lower support member is fixed on the support base, the upper end side of the upper support member is freely connected to the support portion, and a tower shape is provided between the upper and lower support members. Vibration-suppressing support for tower-like structures, comprising a spring mechanism for supporting the load of the structure and a plastic deformation type damper mechanism for damping the vibration by plastic deformation accompanying the expansion and contraction between the upper and lower support members. apparatus. 2. A lower support member of the vibration damping device comprises a frame body vertically fixed to the support base, and an upper support member of the vibration damping device is vertically inserted into the frame body so as to be freely inserted and removed. The frame body includes an upper support plate, a lower support plate, and a connecting member that connects the upper and lower support plates in parallel with a space therebetween. A spring for vertically movably penetrating the support plate is provided in the frame body for always holding the rod in a vertically neutral position, and the frame body is provided between the lower support plate and the rod. The vibration-damping support device for a tower-shaped structure according to claim 1, wherein the vibration-damping support device is connected by a plurality of plastic plates that are plastically deformed by relative movement of the rod and the rod in the vertical direction. 3. A plurality of the plastic plates are arranged below the lower support plate in a radial pattern centered on the rod, and inner ends of the plastic plates are a pair of upper and lower flanges of the rod protruding downward from the lower support plate. 3. The vibration-damping support device for a tower-like structure according to claim 2, wherein the vibration-damping support device is sandwiched between the lower part and the outer end part by a lower support plate and a holding ring provided below the lower support plate. 4. The vibration-damping support device for a tower-shaped structure according to claim 1, wherein the tower-shaped structure is a bushing. 5. The bushing comprises an insulating gas tank fixed to the ground, and a porcelain tube which is connected to the insulating gas tank and is flexible and airtightly coupled to the upper end of the insulating gas tank. The support portion that spreads outward is provided, and a horizontal support base is located below the porcelain bushing and fixed to the ground, and the control unit for supporting the porcelain bushing is provided between the support base and the porcelain bushing support portion. A plurality of vibration damping devices are provided, and this vibration damping device includes a pair of upper and lower support members that vertically expand and contract, the lower end side of the lower support member is fixed on the support base, and the upper end side of the upper support member is of the porcelain tube. A spring that is coupled to the support portion and that supports the load of the porcelain bushing is provided between the upper and lower support members, and a plastic deformation damper mechanism that damps vibration by plastic deformation associated with expansion and contraction between the upper and lower support members. A contract characterized by The vibration damping support device for a tower-shaped structure according to claim 4.