JP3892720B2 - Seismic isolation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic isolation device, and more particularly, to a seismic isolation device suitable for equipment such as a heavy transformer installed in a large-scale substation or a large industrial plant power supply room.
[0002]
[Prior art]
In general, substation equipment installed in substations and industrial plant power supply rooms is connected with fixed members such as bolts and bolts as a seismic structure to prevent slippage or overturning due to storms, earthquakes, etc. It has come to be.
[0003]
Hereinafter, a conventional example of a fixing method for a large-sized substation installed in a large-scale substation or a large plant power supply room will be described with reference to FIG. Among the devices installed in large-scale substations and large plant power supply rooms, there is a transformer, for example, as a large and heavy device. The transformer includes a transformer main body 1, a power line 5 for inputting and outputting power, and a bushing 4 that is an insulating material. In addition, the seismic structure in such substation equipment is connected to and fixed by the support base 2 on which the substation equipment body 1 is installed and a plurality of embedded metal fittings 43 that support the substation equipment main body 1, so that the seismic load that acts during an assumed earthquake It is comprised so that it may endure and be fixed. The embedded metal fitting 43 is made of a metal bar, and is embedded in the foundation floor of the foundation 3 installed in the ground 6.
[0004]
In the seismic structure of the substation main body 1 configured as described above, since a large earthquake acceleration occurs during an earthquake, the substation main body 1 has a moving force that tends to shift in the horizontal direction as a seismic load and a high center of gravity position. Causes falling force due to. At this time, a horizontal shearing force and a pulling force act on the embedded metal fitting 43 due to this seismic load. The embedded metal fitting 43, which is a fixing member, is designed and manufactured as a structure having a strength capable of withstanding the seismic load assumed in the seismic design. In this manner, the substation main body 1 is fixed to the foundation 3 against an assumed earthquake to prevent damage such as a fall due to the earthquake.
[0005]
[Problems to be solved by the invention]
The above-mentioned conventional earthquake-resistant structure of substation equipment has the following five problems.
First, when fixing a substation with a strong fixing member, if the seismic acceleration at the installation location in the building is amplified more than expected due to seismic motion, or if a relatively large earthquake occurs, the fixing member will be damaged. If the transformer is kept in a fixed state without it, the transformer will be directly subjected to a large seismic load. For this reason, parts that are vulnerable to earthquake resistance in substation equipment, for example, bushings made of so-called Seto (ceramics) materials, are very weak compared to metal members, so they break or break, resulting in loss of insulation function. May occur, damage the power line and the substation main body, and lose the function of the substation. That is, there is a problem that even if the fixing strength of the fixing member of the support portion is too high, the substation equipment is adversely affected.
[0006]
Second, if a large earthquake occurs and an earthquake load exceeding the design seismic force is applied to the substation equipment, or if the earthquake acceleration at the installation location in the building is greatly amplified by the earthquake motion, the support is fixed. The member breaks. In this case, in addition to receiving a large seismic load, the substation may lose its fixing function, causing a large slipping or falling phenomenon, and the bushing, power line may be broken or cut, or the substation main body may be seriously damaged Is big. In addition, due to the large slip phenomenon, contact with or collision with other equipment causes chain damage or damage that destroys other equipment, leading to loss of function of the entire substation system and receiving power supply. There is a risk of causing and amplifying cascading damages to the entire industrial plant, public facilities, hospitals and houses, and social and industrial systems as a whole.
[0007]
In addition, when such chain damage is amplified, there is a risk that it will have a serious adverse effect on post-earthquake recovery activities of society as a whole due to the long-term loss of function of social infrastructure called electricity. In the 1995 Hyogoken-Nanbu Earthquake, the 1999 Ajaeli Earthquake in Turkey, and the Chushu Earthquake in Taiwan, such power infrastructure damage became a social problem. In the near future, the government and the Japan Meteorological Agency have announced that Tokai earthquake, Tonankai earthquake, Nankai earthquake, etc. will occur with very high probability within several decades in Japan. In other words, the current seismic structure of substation equipment not only damages the main body of the substation equipment but also has a serious negative impact on peripheral equipment / systems, peripheral industrial plants and society in the event of a large earthquake exceeding the design seismic load. was there.
[0008]
Thirdly, many of the existing substations operating on the current power infrastructure are designed, manufactured, and installed according to past seismic design standards, so that they can sufficiently cope with the seismic loads of the expected ground motion reviewed in recent years. In addition, there is a possibility that the design strength of the support member and the fixing member is lowered due to deterioration or corrosion of the substation equipment that has been used outdoors for a long time. Such substation equipment is expected to cause a great deal of damage in the event of a major earthquake as currently expected. For such substation equipment, it is necessary to take measures for reinforcement and seismic isolation and seismic isolation, but remodeling and re-installing supporting and fixing members of large and heavy substation equipment is a countermeasure. There was a problem that the design method, the cost, the installation method, the installation work period, etc. were extremely difficult.
[0009]
Fourth, the newly installed substation equipment can be used for various seismic and seismic isolation measures, but it is a measure that can solve the first problem already mentioned in the conventional foundation fixing method using fixed members. A spring-supported seismic isolation system in which a certain transformer is supported by a horizontal soft spring such as laminated rubber also has the following problems. The spring-supported seismic isolation system, in which the transformer is supported by a soft spring in the horizontal direction such as laminated rubber, is the dominant frequency and seismic motion of the ground where the natural frequency composed of the transformer and laminated rubber is installed. By making it sufficiently lower than the dominant vibration component region, it is possible to avoid resonance with the ground and earthquake motion, and to greatly reduce the seismic acceleration response of the substation equipment, that is, the acting seismic load. However, instead of greatly reducing the acceleration response, the relative displacement of soft springs such as laminated rubber is greatly amplified.
[0010]
Relative displacements of at least several tens of centimeters may occur in earthquakes with a seismic intensity of 7 classes such as the Hyogo-ken Nanbu Earthquake and the Taiwan Earthquake. For this reason, since the power line connected between the substation device and other peripheral devices is greatly pulled, there is a high possibility that the power line is cut or the insulator supporting it is broken or broken. In addition, since the seismic isolation device itself is expensive and has a large structure, installation costs are high due to the need for significant changes to the existing support frame and foundation structure.
[0011]
Furthermore, since it is a soft spring support, the substation main body receives a large wind load or a relatively small earthquake load during strong winds, storms, weak earthquakes, or light earthquakes, and the spring is deformed according to the wind load or earthquake load. Although the amount of displacement is not as great as that of a large earthquake, it occurs relatively frequently, so that the power line connected between the transformer device and other peripheral devices is pulled, and the power line and the insulator continue to receive a load. In particular, since the insulator has low fatigue strength against repeated loads, the strength deteriorates and the possibility of breakage increases.
[0012]
As described above, the conventional seismic isolation method with soft spring support such as laminated rubber has a high installation cost and relative displacement occurs for all events from wind and small earthquakes to large earthquakes. There is a problem that the insulator and the insulator are frequently subjected to a tensile load, and the possibility of being damaged or broken becomes high.
[0013]
The fifth is the sliding bearing (sliding friction method), which is one of the measures that can solve the fourth problem in the spring-supported seismic isolation system in which the substation equipment is supported by a soft spring in the horizontal direction such as laminated rubber. The seismic isolation system using Japanese Patent Application No. 11-371003 also has the following problems.
[0014]
The seismic isolation device proposed in Japanese Patent Application No. 11-371003 “System Floor and its Configuration Method” adopts a horizontal sliding method, and does not slip to seismic loads or wind loads below a certain friction load. Instead, it functions as a fixing device. In addition, when a large earthquake occurs and an earthquake load exceeding the acting friction load is generated on the installation structure, slippage occurs, and the installation structure does not transmit a load greater than the friction load. It is possible to prevent damage.
[0015]
The seismic isolation device of this patent is a light desk on the floor in the building room and OA equipment that is relatively low-cost and has little impact at the time of damage, minimizing damage to various equipment at the time of earthquake, The purpose is to protect employees working on the OA floor, and since the support mass per seismic isolation device is at most several tens to hundred kg, each seismic isolation device can be simplified. It does not have a function to make the support load acting on each seismic isolation device uniform. In such a patented seismic isolation device, the support load on each seismic isolation device varies greatly depending on the arrangement and installation method of equipment, desks, document shelves, etc. installed on the floor, and the actual center of gravity and seismic isolation A large deviation from the seismic isolation system action center, that is, eccentricity occurs.
[0016]
When a relatively large earthquake occurs in such a state, first, there is a possibility that the seismic isolation device receiving a large supporting load and the fixing member that supports the seismic isolation device may be damaged. Next, when the seismic load exceeds the frictional force of the seismic isolation device, the seismic isolation device that receives a large support load and the fixing member that supports the seismic isolation device will act in proportion to the horizontal seismic load. These may break.
[0017]
In addition, the entire floor excites not only translational motion but also rotational motion in the floor horizontal plane due to the eccentricity of the center of gravity and seismic isolation center. There is a risk of falling and damaging the equipment and shelves. In addition, due to the excitation of rotational motion, a greater slip displacement occurs in the seismic isolation device on the outer periphery of the floor, so that the amount of slip exceeded the design, the seismic isolation device is damaged, or the outer periphery of the floor collides with the wall, Destroy and eventually destroy the entire floor.
[0018]
If such a seismic isolation device structure for the OA floor is applied directly to a large heavy equipment such as a large transformer, the weight of the transformer is several hundred tons, and the supporting mass per seismic isolator is several thousand kg. Since it is tens of thousands of kg, the following problems may occur.
[0019]
Because the support frame that supports large and heavy weight transformers is large, differences in the installation height of each part of this support frame vary depending on distortion during production and distortion when supporting heavy weight. There is a high possibility that large variations will occur in the support load of the seismic isolation devices installed on the support frame. There is a high possibility of variations from those that float from the foundation and do not share the load to those that share several times the design load.
[0020]
In the same structure as the seismic isolation device for the OA floor, there is no function to uniformly adjust the support load of each seismic isolation device, so the support load of each seismic isolation device varies greatly, and the substation equipment having the seismic isolation structure As a result, a deviation (eccentricity) occurs between the center of gravity of the entire structural system and the center of the seismic isolation force. In this case, since there is a large difference between the center of gravity and the center of seismic isolation force, in the case of a large earthquake, a moment (rotational force) acts on the center of seismic isolation force due to the center of gravity of the structural system. The abnormal behavior due to the rotational displacement similar to the above is amplified, and there is a risk of causing serious damage to the substation equipment.
[0021]
Furthermore, in the event of an earthquake, a seismic isolation device that receives a large support load and a fixing member that supports the seismic isolation device are damaged in addition to a large support load because a horizontal seismic load proportional to the support load acts. there is a possibility. The effects of such eccentricity and dispersion of the supporting load overlap, and ultimately, there is a risk that not only the transformation device body is destroyed, but also the transformation device system including the peripheral transformation device is seriously damaged or affected.
[0022]
In order to solve such problems, if the number of seismic isolation support points is three, in principle, a uniform load will act on each seismic isolation device, but in large structures such as large transformers, the support load Therefore, it is necessary to support more than three seismic isolation devices. In such a case, a large variation in the support load as described above is unavoidable in each seismic isolation device responsible for load support. Therefore, when supporting large and heavy substations with a large number of seismic isolation devices, it is necessary to avoid increasing the support load per seismic isolation device. The function to adjust the support load in each seismic device is indispensable.
[0023]
As described above, earthquake resistance measures for substation equipment can be installed at low cost, and the design assumed seismic force and wind load are fixed with a solid fixing function, and the substation equipment is protected from storms and relatively small earthquakes. For large earthquakes that are greater than the design seismic load, the seismic load acting on the substation equipment should be reduced as much as possible so as not to cause major damage, and the peripheral equipment should not be damaged. There is a growing demand for optimal seismic structures and seismic and seismic isolation measures that maintain and protect the overall functionality of the equipment system.
[0024]
In addition, in order to apply the function of the seismic isolation device as proposed in “System Floor and Configuration Method” of Japanese Patent Application No. 11-371003 to a large and heavy transformer, the seismic isolation device itself. The structural load and friction members should have sufficient strength, the support load of the seismic isolation device can be adjusted and equalized so that the eccentricity of the center of action does not occur due to the installation of the seismic isolation device, and abnormal behavior It is necessary to add a new function such as behavior suppression in the event of occurrence.
[0025]
The present invention has been made to solve the above-described problems of the prior art, and can be easily applied from existing transformers to newly installed transformers, and can be manufactured and installed with a simple structure at low cost. The purpose is to obtain a seismic isolation device that can provide the optimal seismic isolation function.
[0026]
[Means for Solving the Problems]
The present invention achieves the above object, and claims. 1 In the invention, a plurality of frames are attached to the mount ,water The gravity load of the gantry is applied to the flat and flat upward sliding surface so as to be slidable in the horizontal direction. Sliding surface An upper member disposed at a fixed position with respect to the gantry when the seismic isolation device is installed, and the relative position in the vertical direction between the upper member and the upper member can be adjusted. Sliding surface A lower member in contact with In addition, the gantry has a horizontal and flat downward pad-facing surface, and has an elastic pad that is sandwiched between the pad-facing surface and the upper member to transmit the gravity load of the gantry to the upper member. The friction coefficient of the elastic pad at the contact portion between the pad facing surface and the upper member is larger than the friction coefficient at the contact portion between the sliding member and the lower member. Characterized by
[0027]
Claim 2 In the invention, a plurality of frames are attached to the mount ,water The gravity load of the gantry is applied to the flat and flat upward sliding surface so as to be slidable in the horizontal direction. Sliding surface An upper member disposed at a fixed position with respect to the gantry when the seismic isolation device is installed, and the relative position in the vertical direction between the upper member and the upper member can be adjusted. Sliding surface A lower member in contact with, A damping device that suppresses relative movement in the horizontal direction between the gantry and the sliding surface, the damping device being attached to the gantry and having a through hole penetrating in a vertical direction; And a flexible elastic-plastic member that is fixed relative to the sliding material and extends in the vertical direction and penetrates the through-hole, and the horizontal restraining member has a horizontal fixing member that is larger than the through-hole. A hole is provided, and a horizontal restraint gap adjusting member is attached so as to cover a part of the horizontal fixing member hole, and the through hole is provided in the horizontal restraint gap adjusting member. It is characterized by.
[0028]
Claims 3 The invention of claim 2 In the invention, the elastoplastic member passes through the through hole with a gap, and the gap is designed to have a maximum horizontal relative displacement at a position where the elastoplastic member passes through the through hole. Smaller than that.
[0029]
Claim 4 According to the present invention, there is provided a seismic isolation device for a substation equipment that is installed between a base floor surface and a support frame on which the substation equipment is installed, and that reduces seismic motion transmitted from the base floor surface. Sliding surface formed on the part and a plurality of sliding surfaces arranged on the sliding surface Friction member And these Friction member A plurality of support columns that are attached to the bottom surface and can be adjusted in height in the vertical direction, and a support frame in which the upper portions of these support columns are restrained at least in the horizontal direction. The support column is composed of a lower support column with a friction member attached to the lower surface, a support frame on the upper surface, and an upper support column that is restrained at least in the horizontal direction. By connecting, it has the function of supporting the load to the column and adjusting the vertical interval between the lower column and the upper column, and the upper column is fixed upward on a part of the upper surface of the upper column A hole through which the bar-shaped member is partially penetrated is provided in a through hole provided for penetrating the bar-shaped member of the upper support column through at least a part of the support plate at the lower part of the support frame from below the support frame. A support member having flexibility in the vertical direction, and having a material whose contact friction coefficient with respect to the upper surface of the upper column and the lower surface of the support frame is larger than the friction coefficient between the sliding surface and the friction member. Depending on the quality, it penetrates through an elastic pad that also serves as a force transmission member in the horizontal direction between the upper support column and the support cradle. A nut member with a screw was screwed in and installed on the support base It is characterized by.
[0030]
Claim 5 According to the present invention, there is provided a seismic isolation device for a substation equipment that is installed between a base floor surface and a support frame on which the substation equipment is installed, and that reduces seismic motion transmitted from the base floor surface. Sliding surface formed on the part and a plurality of sliding surfaces arranged on the sliding surface Friction member And these Friction member Are attached to the bottom surface and can be adjusted in height in the vertical direction, a support frame in which the upper part of these columns is constrained at least in the horizontal direction, and a plurality of support frames arranged on the support frame and acting in the horizontal plane direction Equipped with In addition, the damping device includes a plurality of horizontal restraint members arranged on the support base and having through holes in the vertical direction in the horizontal plane, and the lower part of the elastoplastic member is within the foundation floor surface with respect to each horizontal restraint member. The upper part of the elastic-plastic member passes through the through hole of the horizontal restraining member, and at least at the position of the through-hole, the inner peripheral surface of the through-hole and the outer periphery of the elastic-plastic member It was composed of an elasto-plastic member placed with a gap between it and the surface. It is characterized by.
[0046]
Claims 6 The invention of claim 5 In the invention, the horizontal restraining member is fixed to and installed on the support frame, and is horizontally installed on the fixing member so that the maximum outer diameter of the elastic-plastic member is partly in the horizontal plane. It is characterized by comprising a horizontal fixing member provided with a through hole in which a gap between the through hole minimum inner diameter is smaller than a design maximum slip displacement in the seismic isolation device.
[0047]
Claims 7 The invention of claim 5 In the invention, the horizontal restraining member is fixed and installed on the support frame, and is installed in a horizontal direction on the fixing member, and its installation height can be arbitrarily installed on the fixing member, and A horizontal fixing member provided with a through hole in which a gap between the maximum outer diameter of the elastic-plastic member and the minimum inner diameter of the through hole becomes smaller than a design maximum slip displacement in the seismic isolation device in a part of the horizontal plane And a horizontal fixing member that is installed on the upper surface or the lower surface of the horizontal fixing member and has a through hole having a minimum inner diameter smaller than the minimum inner diameter of the through hole of the horizontal fixing member, and the horizontal installation position can be arbitrarily adjusted on the horizontal fixing member It is characterized by comprising a fixing auxiliary member.
[0048]
Claims 8 The invention of claim Any of 5-7 In the invention, the elastoplastic member has a structure formed by a cylindrical rod of a metal member, a structure formed by a male screw having an outer diameter equal to or larger than an outer diameter of the upper part, and an upper part not having a male screw structure formed by the horizontal part. A structure formed so as to have a length exceeding the through hole position height of the horizontal fixing member of the restraint member, and at least two locations where the outer peripheral surfaces thereof face each other in the cross-sectional direction at at least one arbitrary position on the upper portion; It is characterized by being composed of a notched structure.
[0049]
Claims 9 The invention of claim Any of 5 to 8 In the invention, the fixing embedded member is embedded in the foundation floor so that the height position of the upper surface thereof is at least equal to or higher than the foundation floor surface, and a part of the upper surface thereof is fixed. And a structure in which a female screw corresponding to the male screw at the lower part of the elastic-plastic member and having a screw length longer than the length of the male screw part of the elastic-plastic member is formed.
[0050]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a seismic isolation device according to the present invention will be described with reference to the drawings. Here, a seismic isolation device for a substation equipment will be described as an example, but it goes without saying that it can be applied to other equipment. Moreover, in the following description, the same code | symbol is attached | subjected to the part which is common or similar in a prior art or each embodiment, and duplication description is abbreviate | omitted suitably.
[0051]
[First Embodiment]
First, a first embodiment will be described with reference to FIGS. In FIG. 1, the foundation 3 is installed embedded in the ground 6. On the foundation 3, a plurality of flat and smooth sliding plates 10 having a flat upper surface are arranged and fixed. On the sliding plate 10, a support frame 2 in which the transformer device main body 1 is installed is supported by a plurality of support columns 8 each having a friction member 9 attached to a surface in contact with the sliding plate 11. A power line 5 is connected to a peripheral device via a bushing 4 on the upper part of the substation main body 1.
[0052]
The seismic isolation device 7 that performs a seismic isolation function includes a sliding plate 10 and support columns 8 and 12. The sliding plate 10 is a substantially circular or substantially square plate and is fixed on the foundation 3 by bonding or bolts. As the material of the sliding plate 10, a stainless steel plate, a steel plate plated with hard such as chromium, a steel plate coated with a fluororesin material, and the like are suitable. The surface of the sliding plate 10 is horizontal, and the surface is polished to form a smooth sliding surface in order to smoothly slide the friction member 9 on the lower surface of the column 8 described later with a predetermined frictional force.
[0053]
With such a configuration, the friction member 9 normally functions as a fixing device without sliding against a horizontal load acting on the substation main body 1 due to a storm or a small and medium earthquake that is less than a friction force. In addition, if a horizontal earthquake load exceeding the specified friction force acts on the substation equipment due to a large earthquake, the seismic isolation action works so as not to transmit the seismic force above the friction force smoothly, causing damage to the substation equipment due to a large earthquake. Can be prevented in advance.
[0054]
One support column 8 is slidably installed at approximately the center of the upper surface of each sliding plate 10. As will be described later, the support column 8 is roughly divided into two parts, an upper support column 11 and a lower support column 12 (see FIGS. 2 to 5), which are screw-coupled. It is configured so that the height can be adjusted. By such a height adjustment function, the support load acting on each column 8 can be made substantially uniform by appropriately adjusting the heights of all the columns 8 that support the support frame 2. As a result, there is no variation in the load distribution, so that it is possible to prevent an excessive support load from acting on some of the columns and damage them, and to suppress the eccentricity of the center of gravity of the entire substation equipment. Abnormal behavior such as the rotational behavior of the substation 1 during sliding during an earthquake can be prevented.
[0055]
Further, a friction member 9 is fixed to the lower surface of the lower portion of the column 8 and slides in contact with the sliding plate 10. The material of the friction member 9 is softer than the material of the sliding plate 10. In the case of resin-based materials, fluororesin (for example, Polytetrafluoroethylene ) Materials, resin materials containing oil and carbon, other solid lubricants based on resins, and brass, aluminum, etc. are used as metal-based materials. The sliding friction coefficient of the friction member 9 is determined from the material of the friction member 9, the material of the sliding plate 10, and the surface roughness thereof. By appropriately combining these, the friction coefficient necessary for the seismic isolation design is set. Is possible. That is, the best seismic isolation effect can be obtained by setting an appropriate frictional force of the seismic isolation device 7 according to the assumed seismic force at the installation location.
[0056]
On the other hand, the width of the sliding plate 10 can be determined in consideration of the sliding displacement of the friction member 9 predicted from the assumed seismic force at the installation location. For example, the maximum diameter of the friction member 9 is D _f The expected maximum slip displacement of a large earthquake is δ _S If the sliding plate 10 is a circular plate, at least the diameter is D. _f + 2 · δ _S If it is a square plate, at least one side is D _f + 2 · δ _S The width of If the sliding plate 10 having such a width is installed, the seismic isolation device 7 slides within the range of the sliding plate 10 without protruding from the sliding plate 10 even during a large earthquake, and exhibits a predetermined seismic isolation effect. can do.
[0057]
As shown in an enlarged view in FIG. 2, the support column 8 of the seismic isolation device 7 that supports the support base 2 includes a friction member 9, a lower support column 12, an upper support column 11, and an elastic pad 14 in the order of load transmission from below. ing. The friction member 9 is in contact with the sliding plate 10, and the elastic pad 14 is in contact with the support base 2, and a support load, an earthquake load, or a frictional force is transferred to and from the members in contact with each other.
[0058]
As will be described later (see FIGS. 3 to 5), the upper column 11 is formed with a female screw portion 19 toward the surface of the lower column 12 facing the upper column 11. Further, the lower support column 12 is formed with a male thread portion 13 corresponding to the female thread portion 19, and both are screwed to a certain depth, and are set so that a gap is formed between the upper support column 11 and the lower support column 12. ing.
[0059]
The upper support column 11 is attached with a bar-shaped upper connecting member 15 which is thinner than the upper support column 11 upward from the vicinity of the center of the upper surface thereof. The upper connecting member 15 penetrates through the support frame 2, and an upper region thereof is formed in the connection male screw part 16, and a washer member 18 is installed on the surface of the support frame 2 in the connection screw part 16. A drop prevention nut member 17 is screwed in from the direction. It is set so that a slight gap is formed between the drop-off prevention nut member 17 and the washer member 18.
[0060]
With such a configuration, the upper strut 11 and the lower strut 12 are screwed together to adjust the gap interval between the strut height adjusting male screw portions 13, and finally the strut height can be changed. As a result, it is possible to suppress variation in the support load that acts on the plurality of disposed support columns 8. Further, when assembling and installing the substation main body 1, the support frame 2, the seismic isolation device 7 and the like by the upper connecting member 15 and the drop-off prevention nut member 17 installed thereon, for example, the seismic isolation device 7 is mounted on the support frame 2. When the support frame is installed by hanging the crane with the temporarily fixed, the damage due to the falling off of the support column 8 can be prevented.
[0061]
As shown in FIGS. 3 to 5, in this embodiment, a strut height adjusting male screw portion 13 is formed on the upper portion of the lower strut 12. The friction member 9 in contact with the sliding plate 10 is fitted into the friction member insertion recess 20 and is stuck and fixed using an adhesive or the like. The friction member insertion recess 20 is provided at the center of the lower surface of the lower support column 12, has a depth smaller than the thickness of the friction member 9, and has an upper base that is as flat as the friction member 9. A column height adjusting male screw portion 13 is formed in the upper portion of the lower column 12, and a lower column notch 22 in which two opposing surfaces in the cross-sectional direction are notched on the outer peripheral surface of the lower column 12. Is formed.
[0062]
The upper column 11 is formed with a bar-like upper coupling member 15 for coupling to the support frame at the upper portion thereof, and a coupling male screw portion 16 is formed in the upper region of the upper coupling member 15. In addition, a column height adjusting female screw portion 19 corresponding to the column height adjusting male screw portion 13 of the upper column 11 is formed at the bottom of the upper column 11 at the center of the lower surface. Upper support notch portions 23 are formed by notching two opposing surfaces in the direction.
[0063]
An elastic pad 14 having a through hole 50 (see FIG. 4) through which the upper connecting member 15 penetrates is installed at the upper surface of the lower portion of the upper column 11. The elastic pad 14 has an outer diameter that is at least equal to or greater than the lower outer diameter of the upper support column 11, and the contact friction coefficient between the lower upper surface of the upper support column 11 that contacts the lower surface and the support frame 2 that contacts the upper surface. It has a material larger than the contact friction coefficient between the friction member 9 and the sliding plate 10. The elastic pad 14 is made of a rubber material having a sufficiently flat surface, relatively smooth, and relatively low hardness. For example, rubber materials such as chloroprene rubber, urethane rubber, and silicon rubber are suitable as natural rubber and chemical synthetic rubber.
[0064]
With such a configuration, a spanner or a dedicated jig (not shown) is inserted into the cutout portions 22 and 23 of the upper column 11 and the lower column 12, respectively, and these are screwed together to form a male thread portion for adjusting the column height. The insertion depth with respect to the support post height adjusting female screw portion 19 is changed to adjust the gap distance between the upper support post 11 and the lower support post 12, and finally the support post height can be changed.
[0065]
Since the friction coefficient between the sliding plate 10 and the friction member 9 in each seismic isolation device 7 is the same, if the support load is the same, the frictional force generated at the contact portion will be the same, and the rotation corresponding to this frictional force. The power will be equal. Therefore, when the upper support 11 and the lower support 12 are screwed, if the rotational force acting on the spanner or the dedicated jig, that is, the torque, is made the same, the support load of each seismic isolation device 7 can be made equal. Torque can be easily adjusted by using a wrench, spanner or dedicated torque jig equipped with a torque meter or a device capable of detecting torque. Using such a wrench, spanner or dedicated torque jig, the torque of each seismic isolation device 7 supporting the load of the load is adjusted to be approximately equal, so that the supporting load acting on each seismic isolation device 7 can be reduced. Can be almost identical.
[0066]
In this way, since the variation in the support load of all the seismic isolation devices 7 arranged can be greatly reduced, finally, the support load exceeding the design strength acts on some seismic isolation devices 7. This eliminates the risk of damage or destruction of the seismic isolation device 7 and also minimizes the deviation (eccentricity) between the center of gravity of the entire structural system and the center of the seismic isolation action. Since there is no rotational behavior in the horizontal plane, there is no risk of the occurrence of abnormal behavior of the entire structural system, the seismic isolation function of the seismic isolation device 7 works effectively, and the large-sized substations that are subject to seismic isolation are effective from the earthquake. Can be protected.
[0067]
In addition, by forming the column height adjustment male screw portion 13 upward on the lower column 12, when this seismic isolation device is used outdoors, water can enter the screw even if it is exposed to rain or water. In addition, since water can hardly be accumulated in the internal thread portion 19 for adjusting the column height, the thread portion can be hardly corroded.
[0068]
Further, since the friction member 9 in contact with the sliding plate 10 is fitted in the friction member insertion recess 20 and the upper surface is attached with an adhesive, even if the adhesive deteriorates and peels off, Even if the friction member 9 slides on the sliding plate 10 due to a large earthquake and the like, and the horizontal peeling force due to the friction force is generated on the friction member 9, the friction member 9 is the outer periphery of the portion embedded in the friction member insertion recess 20. Since the surface is caught in the friction member insertion recess 20, it does not come off from the friction member insertion recess 20. Therefore, with such a structure, the friction member 9 is securely fixed to the lower surface of the seismic isolation device 7 and finally can exhibit its friction function, that is, the seismic isolation function.
[0069]
Further, the elastic pad 14 installed between the upper surface of the lower portion of the upper column 11 and the support frame 2 is made of a material whose contact friction coefficient of each member is larger than that of the friction member 9 and the sliding plate 10. . For this reason, when the friction member 9 slides on the sliding plate 10 due to a large earthquake or the like and the generated frictional force is transmitted to the elastic pad 14 via the lower column 12 and the upper column 11, a load equal to the friction material 9 is supported. The contact friction force between the elastic pad 14 and the upper surface of the lower portion of the upper column 11 and the support frame 2 is larger than the transmitted friction force, so that the members in contact with the elastic pad 14 slide. The frictional force transmitted to the upper column 11 can be transmitted to the support base 2 in a fixed state without any problem.
[0070]
If slip easily occurs in the horizontal direction at the contact portion with the elastic pad 14, the upper support column through hole 21 of the support frame and the upper connection column 15 collide violently, and the upper connection column 15 is broken by the collision force. Then, there is a possibility that the support frame 2 and the seismic isolation device 7 are disassembled. With the configuration of this embodiment, the above problems can be solved. That is, since the elastic pad 14 has elasticity in the horizontal direction, the upper support pillar through hole 21 and the upper connection pillar 15 of the support frame can be prevented from colliding with a relatively small seismic force. In a large earthquake, the impact force can be mitigated by the horizontal elasticity of the elastic pad 14, so that the upper connecting column 15 can be finally prevented from being damaged.
[0071]
The elastic pad 14 is a soft elastic body having a relatively small hardness, and is appropriately compressed and deformed in the vertical direction by a support load acting on the elastic pad 14. Even if there is a slight distortion of the contact portion or a deviation in flatness, the support frame 2 and the upper support column 11 can be brought into close contact with each other and the support load can be distributed almost uniformly on the contact surfaces.
[0072]
Therefore, it is possible to reduce the possibility of column breakage due to rattling or load deviation at the time of support, and finally, the friction member 9 on the lower surface of the lower column and the sliding plate 10 are brought into close contact with each other. The surface pressure due to the acting support load can be made substantially uniform. And since it becomes possible to generate | occur | produce the target frictional force of the friction member 9 accurately, the reliability of a seismic isolation function can be improved significantly.
[0073]
[Second Embodiment]
This embodiment is basically the same as the first embodiment, but differs in that a column height adjusting male screw portion 13a is formed below the upper column 11 as shown in FIGS.
[0074]
The friction member 9 in contact with the sliding plate 10 is fitted into a friction member insertion recess 20 provided at the center of the lower surface of the lower column 12, and is attached and fixed using an adhesive or the like. The friction member insertion recess 20 has a depth smaller than the thickness of the friction member 9, and has an upper base that is as flat as the friction member 9.
[0075]
The lower strut 12 has a strut height adjusting female thread portion 19a formed on the upper portion thereof, and a lower strut cutout portion 22 formed by notching two opposing faces in the cross-sectional direction on the outer peripheral surface thereof. Yes.
[0076]
The upper column 11 is formed with a bar-like upper coupling member 15 for coupling to the support frame at the upper portion thereof, and a coupling male screw portion 16 is formed in the upper region of the upper coupling member 15. Further, a lower column of the upper column 11 is formed with a column height adjusting male screw portion 13a corresponding to the column height adjusting female screw portion 19a of the upper column 11 at the center of the lower surface. Upper support notch portions 23 are formed by notching two opposing surfaces in the direction.
[0077]
An elastic pad 14 having a through hole through which the upper connecting member 15 passes is provided at the center on the upper surface of the lower portion of the upper column 11. The elastic pad 14 has an outer diameter that is at least equal to or lower than the lower outer diameter of the upper column 11, and a friction coefficient of contact between the upper surface of the lower portion of the upper column 11 that contacts the lower surface and the support frame 2 that contacts the upper surface. It has a material larger than the coefficient of contact friction between the member 9 and the sliding plate 10.
[0078]
With such a configuration, the same effect as the first embodiment can be obtained with respect to the seismic isolation function. That is, first, a spanner or a dedicated jig is inserted into the notches 22 and 23 of the upper column 11 and the lower column 12, and these are screwed together to adjust the column height of the column screw height adjusting male screw portion 13a. By changing the insertion depth with respect to the female female thread portion 19a, the gap distance between the upper column 11 and the lower column 12 is adjusted, and finally the column height can be changed.
[0079]
Further, by forming a male height 13a for adjusting the column height downward on the lower surface of the upper column 11 and forming a female screw portion 19a for adjusting the column height on the lower column 12, the assembly of the support frame and the seismic isolation device can be performed. When installing the lower support column 12 from below into the upper support column 11 previously incorporated in the support frame 2, the installer can relatively easily open the hole of the internal thread portion 19 a for adjusting the height of the support column on the upper surface of the lower support column 12 from above. Thus, the support height adjusting female thread portion 19a can be easily incorporated into the support height adjusting external thread portion 13a. The seismic isolation device 7 having such a configuration is suitable for indoor use.
[0080]
[Third Embodiment]
Next, a third embodiment will be described with reference to FIGS. As shown in FIGS. 9 and 10, in the present embodiment, first, a seismic isolation device main body 7 that supports the support base 2 is installed on the foundation 3 that is embedded in the ground 6 and installed. The seismic isolation device main body 7 corresponds to the seismic isolation device 7 in the first and second embodiments. That is, similarly to the first and second embodiments, a plurality of sliding plates 10 having a flat top surface and a flat and smooth surface are arranged and fixed, and the support frame 2 in which the transformer device main body 1 is installed on the sliding plate 10. Is supported by a plurality of support columns 8 each having a friction member 9 attached to a surface in contact with the sliding plate 11.
[0081]
Further, in the present embodiment, an attenuation device 24 is added / installed. A plurality of horizontal restraining members 26 having through holes 28 in the horizontal plane are arranged on the outer periphery of the installation support base 2. Corresponding to each horizontal restraining member 26, an elastic-plastic member 25 is vertically fixed and installed on an elastic-plastic member base 27 embedded and installed in the ground 3 around the foundation 3 or around the foundation 3, and this elastic-plastic member. 25 penetrates the central region of the through hole of the corresponding horizontal restraint member 26. Here, the inner diameter of the through hole 28 is manufactured so as to have an appropriate gap with the horizontal restraining member 26 with respect to the diameter of the elastic-plastic member 25.
[0082]
The structure of the seismic isolation device main body 7 that performs the seismic isolation function is the same as that of the seismic isolation device 7 of the first or second embodiment. Since this seismic isolation device main body 7 can obtain the best seismic isolation effect against an earthquake that is assumed at the place where the substation equipment is installed, the substation equipment can be protected from such an earthquake.
[0083]
The damping device 24 includes an elastic-plastic member 25 and a horizontal restraining member 26. The elastic-plastic member 25 is formed in the shape of a cylindrical bar, and the lower part thereof is fixed and installed on an elastic-plastic member foundation 27 embedded in the foundation 3 or the ground 6 around the foundation 3. The length of the elastic-plastic member 25 is sufficiently longer than the length from the surface of the elastic-plastic member base 27 to the through hole 28 on the horizontal restraining member 26. The inner diameter of the through hole is formed so that the gap formed between the elastic-plastic member 25 and the through hole 28 is smaller than the designed maximum slip displacement in the seismic isolation device body 7.
[0084]
The length and thickness of the portion from the elastic-plastic member base 27 surface of the elastic-plastic member 25 to the through hole 28 on the horizontal restraining member 26 are set and formed in the following manner. A critical earthquake greater than the assumed earthquake occurs, causing a large slip displacement in the seismic isolation device body 7, narrowing the initially set gap, and causing the horizontal restraint member 26 to contact the elastoplastic member 25. When it is deformed, the length and thickness of the elastic-plastic member 25 so as to generate a damping amount due to elastic-plastic deformation that absorbs vibration energy so as not to exceed the designed maximum sliding displacement in the seismic isolation device body 7. Can be decided.
[0085]
It is sufficient that the seismic force in a critical earthquake is about 1.5 to 2 times the seismic force of the assumed earthquake. As the material of the elastic-plastic member 25, a material having a high ductility and a high breaking strength, such as a mild steel material, a stainless steel material, and a copper material, is suitable.
[0086]
With such a configuration, first, the friction member 9 and the sliding plate 10 in the seismic isolation device main body 7 are normally slid against a horizontal load acting on the transformer main body 1 due to a storm or a small and medium earthquake that is less than the friction force. Without working as a fixing device. As a next step, if a horizontal earthquake load greater than the specified friction force is applied to the substation due to a relatively large earthquake, the seismic isolation action works so that it does not transmit an earthquake force greater than the friction force. Damage due to can be prevented in advance. If the sliding displacement generated at this time is equal to or less than the gap δ between the elastic-plastic member 25 and the horizontal restraining member 26, the seismic isolation function only of the frictional action by the seismic isolation device body 7 works.
[0087]
Furthermore, as a next step, when an earthquake that is larger than the one assumed in the design occurs, the amount of slip displacement that occurs is controlled within the range of the designed maximum slip displacement only by the frictional action of the seismic isolation device body 7. Therefore, the seismic isolation device main body 7 exceeds the sliding plate 10, and there is a risk that not only the seismic isolation device main body 7 but also the transformer device main body and other devices are seriously damaged. The attenuation device 24 functions as a backup device in order to cope with such a situation.
[0088]
That is, when an earthquake larger than the earthquake assumed in the design occurs and the designed maximum slip displacement is exceeded only by the frictional action of the seismic isolation device main body 7, here, between the elastic-plastic member 25 and the horizontal restraint member 26. Is set to be smaller than the design maximum slip displacement, so that the horizontal restraining member 26 installed on the support frame 2 contacts the elastic-plastic member 25 before the seismic isolation device main body 7 exceeds the design maximum slip displacement. The elastic-plastic member 25 is bent. When this is bent, a restoring force proportional to the bending is generated, and this force is transmitted from the horizontal restraining member 26 to the support frame 2 and acts as a pushing back force on the support frame 2 to suppress the sliding displacement.
[0089]
Further, when the sliding displacement increases due to a large seismic force, and the bending deformation of the elastic-plastic member 25 exceeds the elastic region, the energy dissipation due to the plastic deformation in the elastic-plastic member 25 (history decay energy dissipation). Thus, the vibration energy of the entire target transformer device is attenuated, and the vibration amplitude, that is, the slip displacement can be significantly suppressed. Eventually, even when a destructive large earthquake occurs more than expected, the slip displacement of the seismic isolation device main body 7 is suppressed within the design maximum slip displacement with respect to the assumed earthquake. 7 can be protected from damage and destruction.
[0090]
11 and 12 show the attenuation device 24 in an enlarged manner. In addition, in FIG. 11, about the seismic isolation apparatus main body 7, only the centerline is shown. The damping device 24 includes an elastic-plastic member 25 and a horizontal restraining member 26. The elastoplastic member 25 is formed in a cylindrical bar shape, and is divided into an upper elastoplastic member upper portion 27 and a lower elastoplastic member lower portion 30, and an elastoplastic member external thread portion 31 is formed in the elastoplastic member lower portion 30. In addition, the outer diameter D of the elastic-plastic member upper portion 27 _U And the outer diameter D of the elastic-plastic member lower part 30 _L The relationship with D _L > D _U It is formed as follows.
[0091]
A fixing member 32 is embedded in an elastic-plastic member foundation 27 embedded in the foundation 3 or in the ground 6 around the foundation 3, and a fixing member female screw portion 33 corresponding to the elastic-plastic member external thread portion 31 is perpendicular to the center thereof. Is formed. The elastic-plastic member 25 has an elastic-plastic member lower portion 30 screwed into and fixed to a fixing member 32, and is further tightened on the upper surface of the fixing member 32 by a fixing nut 34 to reinforce the fixing state.
[0092]
The horizontal restraining member 26 is installed on the side surface of the support frame 2, and a through hole 28 in which a buffer member 35 is attached to the inner peripheral surface is formed in the plate portion protruding in the horizontal direction. The gap 36 formed between the through hole 28 and the elastic-plastic member 25 penetrating the central portion of the through hole 28 is δ for the gap 36 and D for the inner diameter of the through hole. _H Then δ = (D _H -D _U ) / 2. In this way, the inner diameter D of the through hole 28 is set so that the gap is smaller than the designed maximum slip displacement in the seismic isolation device main body 7. _H Is formed.
[0093]
Regarding the length and thickness of the elastoplastic member upper portion 29, the length L of the portion from the surface of the elastoplastic member base 27 to the through hole 28 on the horizontal restraint member 26. _T , Substantially deformed portion L of the elastic-plastic member _P And thickness D _U Is set and formed based on the above-mentioned concept.
[0094]
Overall length L of the elastic-plastic member upper part 29 _T The elastic-plastic member 25 has a sufficient margin so that its tip does not come off from the through hole 28 even when the elastic-plastic member 25 receives a deformation force from the horizontal restraining member 26 and greatly deforms in the horizontal direction. The height position of the through hole 28 of the horizontal restraining member 26 is the length L of the elastic-plastic member 25 that is substantially deformed. _P It is formed, adjusted and installed according to the situation. Thickness D _U Is determined according to the amount of energy dissipated in the upper part 29 of the elastic-plastic member at the time of the assumed maximum seismic force. As the material of the elastic-plastic member 25, a material having a high ductility and a high breaking strength, such as a mild steel material, a stainless steel material, and a copper material, is suitable.
[0095]
With such a configuration, first, the elastic-plastic member external thread portion 31 is screwed into the fixing member internal thread portion 33 and is fixed to the fixing member 32, and the elastic member that functions as an attenuation device is adjusted by screwing the fixing member internal thread portion 33. Overall length L of plastic member upper part 29 _T Therefore, it is possible to function as an elasto-plastic damper having a damping capacity as designed. In addition, the fixing member 34 is fastened to the fixing member 32 by fastening the fixing member female thread portion 33 appearing on the upper surface of the fixing member 32 with the fixing nut 34, so that not only the fixing state is reinforced but also a large earthquake. Even when the elasto-plastic member 25 is greatly deformed, cracks and breakage from the fixing member female thread portion 33 can be prevented.
[0096]
Furthermore, when the slip displacement of the seismic isolation device body 7 exceeds the gap δ in a large earthquake exceeding the assumption, the elastic-plastic member 25 and the horizontal restraining member 26 come into contact with each other. However, by attaching the buffer member 35 to the inner peripheral surface of the through hole 28 of the horizontal restraining member 26, it is possible to alleviate the impact of each other member and prevent damage to each member. it can.
[0097]
[Fourth Embodiment]
As shown in FIGS. 13 to 15, the fourth embodiment is an example in which the configuration of the attenuation device 24 in the third embodiment is expanded. The damping device 24 of this embodiment is composed of an elastic-plastic member 25 and a horizontal restraining member 26a. The elastoplastic member 25 is formed in a cylindrical bar shape, and is divided into an upper elastoplastic member upper portion 27 and a lower elastoplastic member lower portion 30, and an elastoplastic member external thread portion 31 is formed in the elastoplastic member lower portion 30. In addition, the outer diameter D of the elastic-plastic member upper portion 27 _U And the outer diameter D of the elastic-plastic member lower part 30 _L The relationship with D _L > D _U It is formed as follows.
[0098]
A fixing member 32 is embedded in an elastic-plastic member foundation 27 embedded in the foundation 3 or in the ground 6 around the foundation 3, and a fixing member female screw portion corresponding to the elastic-plastic member male screw portion 31 is perpendicular to the center thereof. 33 is formed. The elastic-plastic member 25 has an elastic-plastic member lower portion 30 screwed into and fixed to a fixing member 32, and is further tightened on the upper surface of the fixing member 32 by a fixing nut 34 to reinforce the fixing state.
[0099]
The horizontal restraint member 26 a includes a support gantry fixing member 37, a horizontal fixing member 38, and a horizontal restraint gap adjusting member 39. The support gantry fixing member 37 is installed perpendicularly to the side surface of the support gantry 2, and the side surface of the support gantry fixing member 37 has a screw hole 52 (only the center line in FIGS. 13 and 15 for fixing the horizontal fixing member 38 to the bolt). Are provided stepwise in the vertical direction. The horizontal fixing member 38 includes a vertical plate and a horizontal plate for connecting to the support gantry fixing member 37, and is bolted to the support gantry fixing member 37 on the vertical plate. The installation height of the horizontal fixing member 38 can be adjusted stepwise by a plurality of screw holes 52 provided in the support frame fixing member 37 in a stepwise manner in the vertical direction.
[0100]
Further, a horizontal fixing member hole 40 is formed in the horizontal plate portion 56. The horizontal restraint gap adjusting member 39 is fixed and installed on the horizontal fixing member 38. The horizontal restraint gap adjusting member 39 is formed with a through hole 28a having a buffer member 35 attached to the inner peripheral surface. The gap 36 formed between the through hole 28a and the elastic-plastic member 25 penetrating the central portion of the through hole 28a is δ for the gap 36 and D for the inner diameter of the through hole. _H Then δ = (D _H -D _U ) / 2. The inner diameter D of the through hole 28a is set so that the gap is smaller than the designed maximum slip displacement in the seismic isolation device body 7. _H Is formed. The inner diameter of the horizontal fixing member hole 40 of the horizontal fixing member 38 is equal to the inner diameter D of the through hole 28a. _H It is formed to be larger.
[0101]
Regarding the length and thickness of the elastoplastic member upper portion 29, the length L of the portion from the boundary portion between the elastoplastic member upper portion 29 and the elastoplastic member lower portion 30 to the through hole 28 a of the horizontal restraint gap adjusting member 39. _P And thickness D _U Are set and formed in the same way as in the third embodiment. Overall length L of the elastic-plastic member upper part 29 _T Is formed with a sufficient length so that the tip of the elasto-plastic member 25 does not come off from the through hole 28a even if it is deformed greatly in the horizontal direction by receiving a deformation force from the horizontal restraint gap adjusting member 39. ing.
[0102]
Inner diameter D of through hole 28a of horizontal restraint gap adjusting member 39 _H The length L of the elastic-plastic member 25 that is substantially deformed _P And thickness D _U Is designed and manufactured to obtain the necessary attenuation corresponding to the assumed limit earthquake. Inner diameter D of through hole 28a of horizontal restraint gap adjusting member 39 _H Indicates the required distance δ of the gap 36 by the thickness D of the elastic-plastic member 25. _U Is produced against. Length L of elastic-plastic member 25 _P Can be set with high precision by adjusting the height position of the through hole 28a of the horizontal restraint gap adjusting member 39 of the horizontal restraint member 26a and the elastic-plastic member male threaded portion 31 of the elastic-plastic member 25.
[0103]
Thickness D _U Can be manufactured by changing the diameter of the elastic-plastic member upper part 29 as required. Inner diameter D of through hole 28a of horizontal restraint gap adjusting member 39 _H The length L of the elastic-plastic member 25 _P And thickness D _U The required attenuation corresponding to the assumed limit earthquake can be easily set with high accuracy by the combination of the height positions of the horizontal restraining members 26a.
[0104]
With such a configuration, the effect as an attenuation device can be obtained in the same manner as in the third embodiment, and the inner diameter D of the through hole 28a of the horizontal restraint gap adjusting member 39 can be obtained. _H The length L of the elastic-plastic member 25 _P And thickness D _U Since the combined tolerance of the height position of the horizontal restraining member 26a becomes very high, not only the necessary attenuation corresponding to the assumed limit earthquake can be set easily and accurately, but also after the production and installation When the seismic force is changed or the seismic isolation performance standard is changed, the attenuation function of the attenuation device 24 can be easily changed within the range in which it is manufactured and installed. It is possible to flexibly adjust and change the seismic isolation performance for any earthquake.
[0105]
Furthermore, when it is desired to significantly change the capacity of the damping device 24, or when replacement is performed in order to avoid performance deterioration due to corrosion of the elastic-plastic member 25 or the like due to long-term installation, the damping device is activated in the event of a large earthquake. In the case where it is desired to replace the elastic member 25 with a new elastic-plastic member 25 because the plastic member 25 has repeatedly undergone large deformation up to the plastic region, the elastic-plastic member 25 is simply screwed to the fixing member 32. The member 25 can be easily replaced. In this way, the elastic-plastic member 25 can be replaced very easily in order to maintain the damping performance, such as changing the capacity of the entire seismic isolation device, or replacing it for maintenance or after a large earthquake.
Therefore, it can be said that this seismic isolation device is not only a device having high seismic isolation performance, but also a seismic isolation device rich in flexibility and expandability.
[0106]
【The invention's effect】
As described above, according to the present invention, support loads acting on a plurality of installed seismic isolation devices can be shared uniformly with respect to an assumed large earthquake, so that the center of gravity position of the device and the gantry and the waiver The center of seismic isolation force generated by the sliding frictional force generated by the seismic device can be made substantially coincident. With this effect, the seismically isolated equipment can protect the equipment from damage or destruction due to a major earthquake without exhibiting abnormal behavior during a major earthquake.
[Brief description of the drawings]
FIG. 1 is an overall elevation view when a first embodiment of a seismic isolation device according to the present invention is applied to a substation equipment.
FIG. 2 is an enlarged elevation view near the seismic isolation device of FIG.
FIG. 3 is an enlarged vertical sectional view of the vicinity of the seismic isolation device of FIG. 2;
4 is an exploded elevation view of the seismic isolation device of FIGS. 2 and 3. FIG.
5A is a horizontal cross-sectional view taken along line AA in FIG. 4, and FIG. 5B is a horizontal cross-sectional view taken along line BB in FIG.
FIG. 6 is a vertical sectional view corresponding to FIG. 3 in the vicinity of the seismic isolation device when the second embodiment of the seismic isolation device according to the present invention is applied to a transformer.
7 is an exploded elevation view of the seismic isolation device of FIG.
8A is a horizontal sectional view taken along the line AA in FIG. 7, and FIG. 8B is a horizontal sectional view taken along the line BB in FIG.
FIG. 9 is an overall elevation view corresponding to FIG. 1 when the third embodiment of the seismic isolation device according to the present invention is applied to a transformer.
10 is an overall plan view of the transformer device of FIG. 9;
11 is an enlarged vertical sectional view of the vicinity of the damping device of the seismic isolation device of FIG. 9;
12 is an enlarged plan view of the vicinity of the damping device of the seismic isolation device of FIG. 9;
FIG. 13 is an elevational sectional view corresponding to FIG. 11 in the vicinity of the damping device of the seismic isolation device when the fourth embodiment of the seismic isolation device according to the present invention is applied to a transformer.
14 is a plan view of the vicinity of the damping device of the seismic isolation device of FIG. 13;
15 is a developed vertical sectional view of the damping device of the seismic isolation device of FIG. 13;
FIG. 16 is an overall elevation view showing a seismic structure of a conventional substation equipment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Substation equipment body, 2 ... Support stand, 3 ... Foundation, 4 ... Bushing, 5 ... Power line, 6 ... Ground, 7 ... Seismic isolation device (base isolation device body), 8 ... Post, 9 ... Friction member, 10 ... Sliding plate, 11 ... upper support, 12 ... lower support, 13, 13a ... support height adjusting male screw part, 14 ... elastic pad, 15 ... upper connecting pillar, 16 ... connecting pillar male screw part, 17 ... drop-off prevention nut member, 18 ... Washer members, 19 and 19a ... Main pillar height adjusting female thread part, 20 ... Friction member insertion recess, 21 ... Upper strut through hole, 22 ... Lower strut notch, 23 ... Upper strut notch, 24 ... Damping device , 25 ... elastoplastic member, 26 ... horizontal restraint member, 27 ... elastoplastic member base, 28 ... through hole, 29 ... elastoplastic member upper part, 30 ... elastoplastic member lower part, 31 ... elastoplastic member male screw part, 32 ... fixed Member, 33 ... fixing member female screw part, 34 ... fixing nut 35 ... Buffer member, 36 ... Gap, 37 ... Supporting frame fixing member, 38 ... Horizontal fixing member, 39 ... Horizontal restraint gap adjusting member, 40 ... Horizontal fixing member hole, 41 ... Small-diameter elastic-plastic member, 42 ... Large-diameter elastic-plastic Member, 43 ... Embedded metal fitting, 44 ... Connecting plate, 50 ... Through hole, 52 ... Screw hole.

Claims (9)

And a plurality are attached to the frame, a seismic isolation device for at horizontal and slidably contact with the horizontal direction with respect to the sliding surface of the flat upward transfer gravitational load of the frame on the sliding surface,
While having an upper member arranged at a fixed position with respect to the gantry at the time of installation of this seismic isolation device, a vertical member relative to the upper member can be adjusted, and a lower member in contact with the sliding surface , The gantry has a horizontal and flat downward pad facing surface, and has an elastic pad that is sandwiched between the pad facing surface and the upper member and transmits the gravity load of the gantry to the upper member. A seismic isolation device , wherein a coefficient of friction at a contact portion between the pad-facing surface of the elastic pad and the upper member is larger than a coefficient of friction at a contact portion between the sliding member and the lower member . And a plurality are attached to the frame, a seismic isolation device for at horizontal and slidably contact with the horizontal direction with respect to the sliding surface of the flat upward transfer gravitational load of the frame on the sliding surface,
An upper member arranged at a fixed position with respect to the gantry at the time of installation of the seismic isolation device, a vertical position relative to the upper member can be adjusted, a lower member in contact with the sliding surface , the gantry, and the gantry A damping device that suppresses relative movement in the horizontal direction between the sliding surface and the damping device; a horizontal restraining member that has a through hole that is attached to the mount and penetrates in a vertical direction; and the sliding material And a flexible elastic-plastic member that is fixed relatively to each other and extends in the vertical direction and penetrates the through hole, and a horizontal fixing member hole larger than the through hole is provided in the horizontal restraining member. A seismic isolation device , wherein a horizontal restraint gap adjusting member is attached so as to cover a part of the horizontal fixing member hole, and the through hole is provided in the horizontal restraint gap adjusting member . The elastoplastic member passes through the through hole with a gap, and the gap is smaller than the maximum horizontal relative displacement in design at a position where the elastoplastic member passes through the through hole. The seismic isolation device according to claim 2 . In the seismic isolation device for substation equipment, which is installed between the foundation floor and the support frame for installing the substation, and reduces the earthquake motion transmitted from the foundation floor, it is formed on at least a part of the foundation floor. and a sliding surface, and slidable friction member in which a plurality placed on its sliding surface, and these friction member of the plurality capable mounted height adjustment in the vertical direction on the bottom strut, an upper at least horizontal of struts A support frame that is constrained in a direction, and the support column is composed of a lower column with a friction member attached to the lower surface, a support frame on the upper surface, and an upper column that is constrained at least in the horizontal direction. Are connected in the vertical direction by screws, and have the function of supporting the load on the support by adjusting the vertical distance between the lower support and the upper support by the screw connection. A through-hole provided in order to allow the rod-shaped member of the upper column to pass through at least a part of the support plate at the bottom of the support frame from below the support frame for the bar-shaped member fixed and installed upward on a part of the upper surface of the column In addition, the support member has a hole that partially penetrates the rod-like member and has flexibility in the vertical direction, and the friction coefficient of contact between the upper surface of the upper column and the lower surface of the support frame is the friction coefficient between the sliding surface and the friction member. It has a larger material, and this material penetrates through an elastic pad that also serves as a force transmission member in the horizontal direction between the upper column and the support frame, and the male screw part on the upper part of the bar structure on the upper surface of the upper column that has penetrated A seismic isolation device for a substation equipment, wherein a nut member having a female screw corresponding to the male screw is screwed in and installed on a support frame . In the seismic isolation device for substation equipment, which is installed between the foundation floor and the support frame for installing the substation, and reduces the earthquake motion transmitted from the foundation floor, it is formed on at least a part of the foundation floor. and a sliding surface, and slidable friction member in which a plurality placed on its sliding surface, and these friction member of the plurality capable mounted height adjustment in the vertical direction on the bottom strut, an upper at least horizontal of struts A support frame that is constrained in the direction and a plurality of damping devices that are arranged on the support frame and act in a horizontal plane direction. a horizontal restraining member having, for each of the horizontal captive member is disposed and fixed to the fixing embedding member lower portion embedded in the baseplate plane elastoplastic member, the upper part of the elasto-plastic member horizontal restraint Passes through a through hole of the timber, characterized in that it is composed of the elastic-plastic member disposed so as to have a gap between an outer peripheral surface of the elastic-plastic member and the through-hole inner peripheral surface at least the through-hole position Seismic isolation device for substation equipment. The horizontal restraining member includes a fixing member fixed and installed on the support frame, a horizontal projecting installation on the fixing member, and a maximum outer diameter of the elastic-plastic member and a minimum of the through hole on a part of the horizontal plane. 6. The immunity of a substation device according to claim 5 , comprising a horizontal fixing member provided with a through-hole so that a gap between the inner diameter and a design maximum slip displacement of the seismic isolation device is smaller. Seismic device. The horizontal restraining member is fixed to and installed on the support frame, and is installed in a horizontal direction on the fixing member, and the installation height can be arbitrarily set on the fixing member, A horizontal fixing member provided with a through-hole in which a gap between the maximum outer diameter of the elastic-plastic member and the minimum inner diameter of the through-hole is partially smaller than a design maximum slip displacement in the seismic isolation device; and horizontal fixing A horizontal fixing auxiliary member installed on the upper surface or the lower surface of the member, having a through hole having a minimum inner diameter smaller than the minimum inner diameter of the through hole of the horizontal fixing member, and capable of arbitrarily adjusting the horizontal installation position on the horizontal fixing member; The seismic isolation device for a substation device according to claim 5 , wherein the seismic isolation device is configured. The elastic-plastic member includes a structure formed by a cylindrical rod of a metal member, a structure formed by a male screw having an outer diameter equal to or larger than the outer diameter of the upper portion, and an upper portion that is not a male screw structure formed horizontally by the horizontal restraint member. A structure formed so as to have a length that exceeds the height of the through hole of the fixing member, and a structure in which at least two arbitrary positions on the upper surface are opposed to each other in the cross-sectional direction. and, a seismic isolation device of substation equipment according to any one of claims 5 to 7, characterized in that it is configured. The fixing embedding member is embedded in the foundation floor so that the height position of the upper surface thereof is at least equal to or higher than the foundation floor surface, and a structure formed so as to be fixed, and a part of the upper surface includes a downward inner portion. 9. The structure according to claim 5, wherein the female screw is formed with a female screw corresponding to the male screw at the lower part of the elastic-plastic member and having a screw length longer than that of the male screw part of the elastic-plastic member . A seismic isolation device for a substation device according to any one of the above.

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