KR102281791B1 - Seismic Device for solar module structure - Google Patents

Abstract

According to the present invention, a plate-type seismic isolation member, a cylindrical seismic isolation member, a damper, and a spring are installed between a pillar supporting a solar cell module frame and a pile fixed to the ground, wherein a vertical seismic isolation member and a horizontal are integrated in the plate-type seismic isolation member, the cylindrical seismic isolation member, the damper, and the spring. By the plate-type seismic isolation member, the cylindrical seismic isolation member, the damper, and the spring, vibration caused by external forces such as strong wind, earthquake, and the like that cause vertical vibration and horizontal vibration can be effectively absorbed and reduced.

Description

Seismic device for solar module structure

The present invention relates to an earthquake-resistant device for a solar cell module installation structure that is installed between a pillar supporting a solar cell module frame and a pile fixed to the ground, and can effectively absorb and reduce vibration caused by external forces such as strong winds or earthquakes.

Most of the electricity we use today is generated by thermal power or nuclear power, but thermal power or nuclear power has a problem in polluting the environment, so various power generation technologies using natural power have been developed recently. One is solar cell power generation technology.

In order to obtain economical electricity from solar cell power generation, a solar cell module composed of a plurality of solar cells is mounted on a solar cell module frame, and the solar cell module frame must be installed on the ground.

There may be various methods of installing the solar cell module installation structure, but in general, the pile is buried underground to withstand external force, the pillar is installed vertically at the top of the pile, and the solar cell frame is installed at the top of the pillar will do

However, since the external force generated by an earthquake or strong wind may be transmitted to the solar cell frame through piles and pillars as it is and may cause damage to the solar cell frame and installation structure, an earthquake resistant device capable of preventing this is required.

As a prior art, Registered Patent No. 10-1150570 "Seismic-Resistant Solar Cell Device" (Registered on February 27, 2014), Registered Patent No. 10-1722040 "Seismic-Resistant Device for Solar Module Installation" (March 27, 2017) Registered in Japan), Patent Registration No. 10-2140485 "Seismic device for solar module installation structure" (registered on July 28, 2020), etc. have been proposed.

Registered Patent No. 10-1150570 "Seismic type solar cell device" (registered on February 27, 2014) is located between the bottom angle and the support angle so that the support case and the support bolt are accommodated therein, and the lower end is at the support angle. The upper end is supported by the bottom angle and proposes a vibration-resistant solar cell device characterized in that it includes a compression spring that absorbs vibrations caused by external force, but a device such as a damper that prevents the vibration of the compression spring when an external force is applied There are flaws that are not available.

Registered Patent No. 10-1722040 "Seismic device for solar module installation" (registered on March 27, 2017) is accommodated in the concave groove 11 of the earthquake-resistant pad 10 and the post ( 6, 7) is configured to include a steel ball 20 in contact with the plate 9, and the steel ball 20 is located in the center of the bottom surface of the concave groove 11 of the earthquake-resistant pad 10, the earthquake-resistant pad (10) A seismic device for photovoltaic module installation is proposed, characterized in that the insert is injected into or a center alignment groove 12 is concavely formed in the center of the bottom surface of the concave groove 11, but of a steel ball located in the concave groove of the seismic pad Although the horizontal external force can be relieved by rotation, the vertical external force is blocked by an elastic seismic pad, but the steel ball has no elasticity, so it is difficult to block the vertical external force by interlocking the seismic pad and the steel ball in fact.

Registered Patent No. 10-2140485 "Seismic device for solar module installation structure" (registered on July 28, 2020) is an earthquake-resistant device, made in a plate shape with elasticity, and an insertion hole is formed in the center of the upper surface and a body in which a plurality of receiving grooves are concave downwardly while being spaced apart from each other around the insertion hole; an auxiliary body having elasticity and having a plate shape corresponding to the insertion hole, an auxiliary receiving groove larger than the receiving groove being concave downwardly on the upper surface, and being inserted into the insertion hole; and a spherical shape, including a rotating body accommodated in the auxiliary receiving groove, wherein the plurality of bodies are positioned between one pillar plate and one base to correspond to the pillar plate and the base, the rotating body is the auxiliary receiving groove We propose a technology characterized in that it is accommodated in and in contact with the pillar plate so as to be movable,

The horizontal external force can be alleviated by the rotation of the rotating body inserted into the elastic plate-shaped auxiliary receiving groove, but the vertical external force is blocked by the elastic plate-shaped, but the rotating body has no elasticity. There is a problem in that it is difficult to block the vertical external force by interlocking the rotating body.

Registered Patent No. 10-1150570 "Seismic-proof solar cell device" (Registered on February 27, 2014) Registered Patent No. 10-1722040 "Seismic device for solar module installation" (registered on March 27, 2017) Registered Patent No. 10-2140485 "Seismic device for solar module installation structure" (registered on July 28, 2020)

The present invention has been devised to solve the problems of the prior art as described above, and is installed between a pillar supporting a solar cell module frame and a pile fixed to the ground, and effectively absorbs and reduces vibrations caused by external forces such as strong winds or earthquakes It is an object of the present invention to provide an earthquake-resistant device that can prevent malfunction of a solar cell module or damage to a solar cell module frame.

In order to solve the above problems, the present invention provides a seismic device for a solar cell module installation structure to be installed between a pillar supporting a solar cell module frame and a pile fixed to the ground: an upper plate and a lower portion from the lower surface of the upper plate an upper cylinder extending to and including an upper cylinder of a cylindrical shape with an open lower end; a lower plate cylinder comprising a lower plate and a lower cylinder extending upward from the upper surface of the lower plate and spaced apart from the inner side of the upper cylinder to face the upper cylinder in a cylindrical shape; a spring provided inside the lower cylinder; It is provided at the upper end of the spring, and is provided to be movable up and down along the inner circumferential surface of the lower cylinder while sealing the open upper end of the lower cylinder to form a cylinder chamber that is a sealed space in the lower cylinder, the upper end of the lower cylinder A lower disc-shaped damper plate positioned lower, a disc-shaped damper upper plate spaced upward from the damper lower plate and positioned higher than the upper end of the lower cylinder, and an inner edge connecting the edge of the lower damper plate and the edge of the damper upper plate and a cylindrical damper side plate forming a buffer chamber in the damper, a plurality of orifices communicating the buffer chamber and the cylinder chamber are formed on the damper lower plate, and a plurality of air communicating the buffer chamber and the outside is formed on the damper side plate Damper where the entrance is formed; A vertical seismic isolating member, which is a rubber plate fixed on the upper surface of the damper upper plate, and a metal plate laminated on the upper part of the vertical seismic isolator, which protrude upward to reduce a contact surface with the upper plate, a horizontal seismic isolator having a plurality of hemispherical protrusions A plate-shaped seismic isolating member made to include and positioned higher than the upper end of the lower cylinder; a cylindrical seismic isolator which is a rubber elastic body provided along the outer circumferential surface of the lower cylinder; a plurality of separation preventing members having an upper end mounted on the upper plate and a lower end mounted on the lower plate to prevent the upper plate cylinder from being separated from the lower plate cylinder; It is characterized in that it comprises a.

In the above, it is preferable that the orifice has a shape in which the cross-sectional area is gradually reduced while extending from the cylinder chamber toward the buffer chamber, the air inlet is inclined upwardly toward the radially outward side, and a desiccant is provided in the buffer chamber. do.

In the above: the separation preventing member, a bolt body penetrating the upper plate through hole formed in the upper plate and the lower plate through hole formed in the lower plate, and a bolt head formed at the upper end of the bolt body and seated on the upper surface of the upper plate. It consists of a bolt for preventing separation, and a nut for preventing separation that is seated on the lower surface of the lower plate while being screwed to the bolt body; In order to prevent micro-movement of the bolt body, it is preferable that a through-hole bushing, which is a rubber elastic body, is provided in the upper plate through-hole of the upper plate.

In the above, a cylinder bushing having a lubricating function is mounted on the inner circumferential surface of the lower cylinder, and an O-ring in close contact with the cylinder bushing is mounted on the damper side plate of the damper, so that the damper seals the cylinder chamber while closing the cylinder bushing. It is preferable to be able to move up and down according to it.

As described above, the present invention is installed between the pillar supporting the solar cell module frame and the pile fixed to the ground, and can effectively absorb and reduce vibration caused by external forces such as strong winds or earthquakes, so that malfunctions of the solar cell module or the solar cell It can prevent damage to the module frame.

In particular, the present invention relates to a plate-shaped seismic isolator in which a vertical seismic isolator and a horizontal seismic isolator are integrated, a cylindrical seismic isolator, a damper, and a spring to generate vibrations in vertical and horizontal directions. Vibration caused by external forces such as strong winds and earthquakes can be effectively absorbed and reduced.

1 is an exemplary view of a state in which a seismic device for a solar cell module installation structure is used according to an embodiment of the present invention;
2 is a conceptual cross-sectional view of a seismic device for a solar cell module installation structure according to an embodiment of the present invention;
Figure 3 is an exploded cross-sectional view of Figure 2;
4 is a plan view of the plate-shaped seismic isolator of FIG. 3;
5 is a cross-sectional view taken along line AA of FIG. 4 .

earthquake general

In order to explain the seismic device, first, general technical matters related to the earthquake will be described.

An earthquake of 4.5 on the Richter scale is also being sensed across the country. The frequency of seismic waves is usually in the range of 0.5 to 10 Hz, and in general, the larger the earthquake magnitude, the smaller the frequency.

The frequency of seismic waves generated in Korea is about 2 to 5 Hz, which is biased toward the higher frequency. Therefore, the damage of low-rise buildings may be greater than that of high-rise buildings.

The seismic design method is basically a method to place the ground and the building apart so that they receive less energy transmitted by the ground.

An earthquake is when the energy generated by the activity of a fault is transmitted as a wave through the strata, causing the ground to shake. Among them, if a wave in the horizontal direction with respect to the ground shakes the lower part of the building, an inertia force is applied to the upper part, and if the building cannot withstand the inertia force, it will be damaged.

Types and characteristics of seismic waves

A seismic wave is a low-frequency wave that is generated by earthquakes, volcanoes, movement of magma, landslides, and explosions by humans and spreads along the crust. When an earthquake occurs, several types of seismic waves with different velocities are generated.

Seismic waves can be classified into two types according to their characteristics. They can be divided into body waves and surface waves. Real waves include P wave (primary wave) and S wave (secondary wave), and surface wave includes L wave (Love wave) and R wave (Rayleigh wave).

Body Wave

There are two types of seismic waves, P-waves and S-waves, which are transmitted through the Earth's crust.

- P wave (Primary wave)

It is a longitudinal wave and a pressure wave. It can pass through solids, liquids and gases. Because the speed is relatively fast (7-8 km/s), it reaches the seismic observatory first after an earthquake, hence the name P-wave, meaning first. Since the amplitude is small, the damage caused by the P wave is small.

- S wave (Secondary wave)

It is a transverse wave and a shear wave. Since liquids and gases do not have shear stress, S waves only pass through solid materials. The speed is relatively slow (3~4 km/s), and the P wave reaches the seismic observatory after it reaches the seismic observatory. The larger the amplitude, the greater the damage.

Surface Wave

Seismic waves that travel along the Earth's surface. At a speed of about 2 to 4.4 km/s, the medium passing through is transmitted only to the surface of the earth and is the slowest, resulting in large amplitude and great damage. There are two types of surface waves: L wave (Love wave) and R wave (Rayleigh wave).

- L wave (Love wave)

As seismic waves that move horizontally along the surface, they are included in the long wave because the direction of travel and the direction of vibration are at right angles. The speed is about 2~4.4 km/s, which is the third fastest, and it is observed after S wave at seismic observatories.

- R wave (Rayleigh wave)

As seismic waves that perform counter-rotating elliptical motion along the surface at right angles, they are included in long waves because the direction of vibration and the direction of travel are perpendicular. The destructive force is the strongest among seismic waves, and the speed is 2~4.2 km/s, similar to the Love wave, but it is slower than the Love wave and is observed next to the L wave at seismic observatories.

Seismic design and seismic isolation and isolation

Seismic design is a design that includes seismic isolation and seismic isolation in a broad sense, and it is a structure that resists earthquakes and withstands vibrations. It refers to a structure that additionally reflects seismic materials or auxiliary structures in the design. .

Escape is a structure that escapes from the strong energy band of seismic waves, and it means to reflect changes in the structure's frequency, etc. in the design by using a vibration insulator. Examples include laminated rubber plates, lead rubber bearings (LRB), and bearings (bridge bearings).

Vibration suppression refers to a structure that uses a principle or actively responds to an earthquake rather than avoiding or accepting it. Passive Mass Damper (TMD; Tuned Mass Damper,) Includes Active Mass Damper (AMD; Active Mass Damper). This is the principle of maintaining the stability of the structure by moving the mass in the opposite phase of the wavelength at which the earthquake occurs.

In a word, the seismic device moves up, down, left and right to block both vertical and horizontal vibrations, and while the spring mainly responds to vertical impact, the damper seismic isolation structure responds to both vertical and horizontal impact. When an earthquake occurs, the floor on which the seismic isolator is installed moves up, down, left and right to absorb the shock.

In addition to seismic structures, there is a method of reducing the energy received by structures by lengthening the period of vibrations generated by earthquakes among seismic isolation structures that can more effectively reduce earthquake damage. Since the energy of a wave is larger as the period is shorter, it is necessary to change it to mitigate the impact. When an earthquake occurs, structures fixed to the ground are bound to vibrate along with the vibrations of the earthquake, but structures constructed with seismic isolation structures are relatively safe because the vibrations are mitigated and transmitted. However, although the structure itself may be relatively safe from vibration, if the structure moves significantly, it can become dangerous depending on the surrounding environment. Therefore, the damping device is installed to prevent this, and this device called a damper consumes vibration energy. It plays a role in gradually easing the vibration of the structure.

The spring and damper always go together like a needle and thread, and it is attached together with the spring and artificially consumes the energy stored in the spring (by exerting a damping force), so the device that calms the sway of the spring is the damper. all. A damper is usually manufactured in a structure in which a piston reciprocates in a sealed cylinder filled with gas or oil. Utilizing the action that consumes energy in the process of moving oil from one chamber to the other chamber, it reduces the sway that occurs when the deformed spring is restored to its original position. The damper can control both the stretching and stretching movements, and the return time can be delayed, and the return time can be adjusted by adjusting the size of the orifice.

In the above and below, the damping force refers to a force that stops the vibration to a certain state with respect to a certain vibration, and is a force that moves in the opposite direction to the vibration direction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are given to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

1 is an exemplary view of a state in which an earthquake-resistant device for a solar cell module installation structure according to an embodiment of the present invention is used, and FIG. 2 is a conceptual cross-sectional view of an earthquake-resistant device for a solar cell module installation structure according to an embodiment according to the present invention, 3 is an exploded cross-sectional view of FIG. 2 , FIG. 4 is a plan view of the plate-shaped seismic isolator of FIG. 3 , and FIG. 5 is a cross-sectional view taken along line AA of FIG. 4 .

The seismic device 100 for a solar cell module installation structure according to an embodiment of the present invention includes a pillar 30 supporting a solar cell module frame 20 on which a plurality of solar cell modules 10 are mounted, and buried underground. It is mounted between the piles 40 fixed to the ground.

The seismic device 100 for the solar cell module installation structure is screwed to each of the pillar 30 and the pile 40, and can block all vibrations coming in the vertical and horizontal directions by moving up, down, left and right.

The seismic device 100 for the solar cell module installation structure is largely an upper plate cylinder 110 , a lower plate cylinder 120 , a spring 130 , a damper 140 , a plate-shaped seismic isolator 150 , and a cylindrical seismic isolator 160 . ), the separation preventing member 170, and the like.

The upper plate cylinder 110 includes an upper plate 111 , a column coupling part 112 provided on the upper part of the upper plate 111 , and a cylindrical upper cylinder extending downward from the lower surface of the upper plate 111 and having an open lower end. (113) is included.

The upper plate 111 is in the form of a square plate, a plurality of upper plate through-holes 111a are formed at the edge of the upper plate 111, and a bushing 111b for the through-holes is mounted in the upper plate through-hole 111a.

The column coupling portion 112 is preferably in the form of a bolt in order to be easily coupled to the column 30 . Such a bolt-shaped column coupling portion 112 is preferably applied to a seismic device for a small solar cell module frame.

The lower plate cylinder 120 includes a lower plate 121, a pile coupling part 122 provided on the lower part of the lower plate 121, and a lower cylinder of a cylindrical shape extending upward from the upper surface of the lower plate 121 and having an open upper end. (123) is included.

The lower plate 121 is in the form of a square plate, and a plurality of lower plate through holes 121a are formed at the edge of the lower plate 121 .

The pile coupling part 122 is preferably in the form of a bolt in order to be easily coupled with the pile 40 .

The lower cylinder 123 is disposed to be inserted into the upper cylinder 113 inside the upper cylinder 113 , and is spaced apart from the inside of the upper cylinder 113 to face the upper cylinder 113 .

A spring 130 is provided inside the lower cylinder 123 .

A damper 140 is provided on the spring 130 .

The damper 140 is provided at the upper end of the spring 130 and is provided to be movable up and down along the inner circumferential surface of the lower cylinder 123 while sealing the open upper end of the lower cylinder 123 , and is sealed in the lower cylinder 123 . A cylinder chamber 123a, which is a spaced space, is formed.

The volume of the cylinder chamber 123a varies according to the vertical movement of the damper 140 .

The damper 140 includes a disc-shaped damper lower plate 141, a disc-shaped damper upper plate 142 spaced upwardly from the damper lower plate, and the edge of the lower damper plate 141 and the edge of the damper upper plate 142. It is made to include a cylindrical damper side plate 143 that forms a buffer chamber 144 therein while connecting.

The lower damper plate 141 is disposed lower than the upper end of the lower cylinder 123 and seals the open upper end of the lower cylinder 123 to form a cylinder chamber 123a, which is a sealed space in the lower cylinder 123, and a buffer chamber. A plurality of orifices 141a for communicating 144 with the cylinder chamber 123a are formed.

The orifice 141a has a shape in which the cross-sectional area is gradually reduced while extending from the cylinder chamber 123a toward the buffer chamber 144 . That is, the orifice 141a has a shape in which the cross-sectional area is gradually reduced while extending from the lower part to the upper part.

A plurality of air inlets (143a) for communicating the buffer chamber 144 and the outside are formed in the damper side plate 143, and each air inlet (143a) is formed to be inclined upwardly toward the radially outward, and the air inlet (143a) The outer side of the damper is formed on the upper edge of the side plate (143).

Therefore, the air inside the buffer chamber 144 can freely flow to the outside through the air inlet (143a).

When external air is sucked into the buffer chamber 144 through the air inlet 143a and the air in the buffer chamber 144 is sucked into the cylinder chamber 123a, various effects that moisture in the air may have on the spring 130 are affected. A dehumidifying agent 145 is provided in the buffer chamber 144 to be removed.

An O-ring 143b is mounted on the lower portion of the outer circumferential surface of the damper side plate 143, and the airtightness inside the cylinder chamber 123a is maintained by the O-ring 143b. An O-ring mounting groove for the O-ring 143b is formed on the outer peripheral edge of the damper side plate 143 .

Accordingly, the damper 140 has a vibration damping effect by appropriately controlling the amount of air passing through the orifice 141a.

As a means for sealing the contact portion between the lower cylinder 123 and the damper 140, a cylinder bushing 123b is attached to the inner circumferential surface of the lower cylinder 123, and the cylinder bushing 123b has a lubricating function, so the O-ring 143b ) can move up and down smoothly while sealing is possible.

As the material of the cylinder bushing 123b, polytetrafluoroethylene (PTFE) with excellent lubrication is suitable.

This method is only a means to avoid precision machining of the inner circumferential surface of the lower cylinder 123, and if necessary, the outer circumferential surface of the damper side plate 143 and the inner circumferential surface of the lower cylinder 123 are precisely machined instead of the PTFE material cylinder bushing 123b. The sealing function inside the cylinder chamber 123a can also be improved.
The upper damper plate 142 has a disk shape and is spaced upward from the damper lower plate 141 and is positioned higher than the upper end of the lower cylinder 123 .

A plate-shaped seismic isolator 150 is fixedly provided on the upper surface of the damper upper plate 142 , and the plate-shaped seismic isolator 150 is positioned higher than the upper end of the lower cylinder 123 .

In the plate-shaped seismic isolator 150, a lower vertical seismic isolator 151 and an upper horizontal seismic isolator 152 are integrated in the form of a laminate.

The vertical seismic isolator 151 is a urethane rubber plate provided with a seismic isolating function against vertical impact, and in particular, can respond to the R wave of the seismic surface wave.

The urethane rubber constituting the vertical seismic isolation member 151 is a rubber elastomer produced by the reaction of polyester or polyether with isocyanate, and is highly elastic and has abrasive properties than other synthetic rubbers. Being excellent is an advantage.

The horizontal seismic isolator 152 is provided with a seismic isolating function against horizontal impact, is intended to be in contact with the upper plate 111, is made of a metal plate such as carbon steel or stainless steel with high tensile strength, and has a plurality of hemispherical shapes protruding toward the upper part. The protrusion 152a is formed to reduce the contact surface with the upper plate 111 so as to be easily slid on the L wave.

When a material such as urethane is foamed on the horizontal seismic isolator 152 having the plurality of protrusions 152a to form an integral body with the vertical seismic isolator 151, the vertical seismic isolator 151 is completely formed in the horizontal seismic isolator 152. It may be formed integrally.

A cylindrical seismic isolator 160 is provided along the outer peripheral surface of the lower cylinder 123 .

The cylindrical seismic isolator 160 is a rubber elastic body in the form of a cylinder, and since it has a cylindrical shape (cylindrical shape), it has a structure capable of isolating vibrations even when an external force is pushed in from any horizontal direction.

That is, the cylindrical seismic isolator 160 isolates the horizontal vibration or impact of the lower cylinder 123 and the upper cylinder 113 .

In particular, the cylindrical seismic isolator 160 is for isolating L-wave vibrations in the horizontal direction among surface waves of strong winds or earthquakes.

The cylindrical seismic isolator 160 is a cylindrical synthetic rubber plate capable of dispersing and absorbing seismic force so that vibration is not transmitted to the column 30 for supporting the solar cell module frame 20, and is made of BR (Butadiene Rubber). And NBR (Nitrile Butadiene Rubber), and any one of urethane rubber (Urethane Rubber) may be selected.

In addition, the cylindrical seismic isolator 160 is a TPE (Thermal Plastic Elastomer) or urethane in which PP (Polypropylene) or PE (Polyethylene) and a rubber material are copolymerized to compensate for the severe physical property change caused by heat, moisture and UV rays of the rubber material. It is preferably made of TPU (thermal poly-urethane) having a high degree of crystallinity in bonding.

At this time, it is preferable that the rubber elastic body for the cylindrical seismic isolator 160 has a thickness and hardness that can sufficiently absorb vibration according to the strength of the earthquake and sufficiently mitigate the shock caused by the vibration. In particular, the hardness is based on Shore A A hardness of about 55 to 75 is preferable.

In order to prevent the upper plate cylinder 110 from being separated from the lower plate cylinder 120 , a plurality of separation preventing members 170 having an upper end mounted on the upper plate 111 and a lower end mounted on the lower plate 121 are provided.

The separation prevention member 170 is composed of a separation prevention bolt 171 having a bolt head 171a and a bolt body 171b, and a separation prevention nut 172 fastened thereto.

The bolt body 171b is disposed to pass through the upper plate through-hole 111a formed in the upper plate 111 and the lower plate through-hole 121a formed in the lower plate 121, and the bolt head 171a is located on the upper surface of the upper plate 111. It is seated, and the nut 172 for preventing separation is screwed to the bolt body 171b to be seated on the lower surface of the lower plate 121 .

In addition, a bushing (111b) for the through hole is provided in the upper plate through hole (111a) to prevent micro-movement of the bolt body (171b).

Such a separation preventing member 170 restrains the upper plate 111 and the lower plate 121, and when an external force such as a strong wind is directed from the lower part of the solar cell module frame 20 to the upper part, the upper plate cylinder ( 110) in order to prevent an accident in which it is detached.

In addition, the through-hole bushing 111b is to prevent micro-movement of the bolt body 171b, and allows flow when the upper plate 111 and the lower plate 121 of the earthquake-resistant device 100 are shaken up, down, left and right by an external force, and through The material of the common bushing 111b is suitable for urethane rubber, and urethane rubber is a rubber elastomer by reaction with polyester or polyether and isocyanate, which is highly elastic and has abrasion resistance. It has the advantage of being superior to other synthetic rubbers.

Meanwhile, in FIG. 2 , the separation preventing member 170 has an upper end mounted on the upper plate 111 and a lower end coupled to the lower plate 121 , but in some embodiments, the upper end of the separation preventing member 170 is mounted on the upper plate 111 . ) is fastened to the lower end of the pillar 30 provided on the upper surface of the upper plate 111 while penetrating the upper plate through hole 111a of the upper plate 111 , and the lower end of the separation preventing member 170 is the lower plate through hole 121a of the lower plate 121 ) It may be fastened to the upper end of the pile 40 provided on the lower surface of the lower plate 121 while passing through.

The operation of the device as described above will be described.

When the L wave in the horizontal direction and the R wave vibration in the vertical direction among the surface waves of strong winds or earthquakes are pushed to the solar cell module frame 20, it is primarily isolated by the plate-shaped seismic isolator 150, and is secondarily isolated by the spring 130. is composed

In addition, in the cylindrical seismic isolator 160 , L-wave vibrations in the horizontal direction among surface waves of strong winds or earthquakes are primarily isolated, and the spring 130 is secondarily isolated.

When the R wave vibration in the vertical direction comes from the surface wave of a strong wind or earthquake, the spring 130 of the earthquake-resistant device 100 absorbs a force input by vibration or impact through expansion and contraction.

However, the spring 130 has a characteristic of releasing the energy absorbed through its deformation while returning to its original form, and this is called periodic vibration. In order to minimize this periodic vibration, the damper 140 generates resistance when the position moves (stroke) to reduce kinetic energy, thereby advancing the disappearance of the periodic vibration.

The contraction of the spring 130 due to an external impact increases the pressure inside the cylinder chamber 123a as the volume of the cylinder chamber 123a decreases, and at this time, the flow amount of air per unit time passing through the orifice 141a increases.

Conversely, the elongation of the spring 130 increases the volume of the cylinder chamber 123a and decreases the pressure inside the cylinder chamber 123a, so it is necessary to suck in air from the outside, but the amount of air per unit time passing through the orifice 141a increases. Since it is less than the discharge time, the inside of the cylinder chamber 123a is in a vacuum state lower than atmospheric pressure, which prevents the extension of the spring 130, so that the spring 130 is prevented from swinging, that is, damper ringing (seismic isolation) occurs.

When the amplitude of vertical vibration is transmitted from the upper plate cylinder 110 and the lower plate cylinder 120 of the seismic device 100, the spring 130 contracts and the volume of the cylinder chamber 123a decreases while the pressure increases. The internal air flows through the buffer chamber 144 through the orifice 141a and flows through the air inlet 143a to reduce the impact energy in the process.

At this time, if the spring 130 does not reduce in any form the energy that causes the so-called sloshing of the spring, which is the so-called sloshing energy of the spring 130 as the resistance increases immediately after the external impact, the stroke is reduced and then the stroke is increased again. Although it will continue, if the stroke of the spring 130 increases, the volume of the cylinder chamber 123a increases and the pressure in the cylinder chamber 123a is lowered at the same time to suck air from the outside through the orifice 141a, but the speed is slow and the spring 130 ) to suppress the increase in stroke.

The circular orifice 141a has a form in which the cross-sectional area is gradually reduced while extending from the cylinder chamber 123a toward the buffer chamber 144, that is, tapering in the longitudinal direction toward the buffer chamber 144 of the damper 140. Because of the shape, when the lower plate cylinder 120 rises due to the seismic force, when the spring 130 in the lower cylinder 123 contracts, the air inside the cylinder chamber 123a easily enters the buffer chamber 144 through the orifice 141a. It allows to escape, and on the contrary, when the spring 130 expands, it delays the suction of the air inside the buffer chamber 144 into the cylinder chamber 123a, thereby reducing the vibration amplitude of the spring 130 to increase the seismic isolation function.

Boyle's law for the pressure and volume of air in the cylinder chamber 123a described above means that the product of pressure and volume is a constant for a constant mass of gas when the temperature is constant in an enclosed space.

Therefore, if there is a change in pressure and volume under the same conditions, it can be expressed as

P1 x V1 = P2 x V2 = constant (P=pressure, V=volume)

This equation shows that as the volume of a gas container increases, the pressure of the gas decreases proportionally. Similarly, as the volume decreases, the pressure increases.

Since the intrinsic frequency of the spring 130 is different depending on the strength, in order to select a suitable spring, it should first be selected in consideration of the frequency of the seismic wave.

The duration of vibrations that occur in one earthquake is about 1 minute, and the frequency of seismic waves is about 0.0082 Hz to 10 Hz, and the large amplitude is about once per second. Therefore, it is preferable to limit the natural frequency of the spring to 1-2Hz.

The spring constant (k) refers to a constant that expresses the force acting on an elastic body such as a spring and the resulting deformation of the elastic body in a proportional relationship. Like a spring, when the length changes according to a given force, it is called the elastic modulus or Young's modulus, and the spring constant refers to the Young's modulus of the spring.

k= W/A --------- schedule

where W; External load (kg), A; Deformation (mm), k; Spring constant (kg/mm)

Therefore, the external force and the deformation at that time are proportional, and the value obtained by dividing the external load by the deformation is always constant. This value is called spring constant and the unit is usually expressed in kg/mm. This spring constant indicates the strength of the spring. A strong spring has a large spring constant, and a weak spring has a small spring constant. In addition, the relationship between the spring constant, external load, and frequency (C) is expressed by the following equation.

C= 1/2π·(√(K.g))/W

where K; spring constant (kg/mm), g; Gravitational acceleration (9.8 mm/sec), W; External load (kg), C; Frequency (C/sec)

In the above equation, g and π are constant, so the frequency is proportional to the spring constant and inversely proportional to the external load. For example, if the spring constant is constant, if the load is increased, the frequency will decrease, and if the load is constant, a spring with a small spring constant should be used to decrease the frequency. However, if a spring with too small a spring constant is used, the deformation increases and the strength is adversely affected. As an example, the spring constant of the spring 130 of the seismic device for the solar cell module installation structure is approximately 2 to 4 kg/mm, and preferably 3 kg/mm is suitable.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

10: solar cell module 20: solar cell module frame
30: pillar 40: pile
100: seismic device
110: top plate cylinder
111: upper plate 111a: upper plate through hole
111b: bushing for through hole 112: column coupling part
113: upper cylinder
120: lower plate cylinder
121: lower plate 121a: lower plate through hole
122: pile coupling part 123: lower cylinder
123a: cylinder chamber 123b: cylinder bushing
130: spring
140: damper
141: damper lower plate 141a: orifice
142: damper top plate 143: damper side plate
143a: air inlet 143b: O-ring
144: buffer chamber 145: dehumidifier
150: plate type seismic isolation member
151: vertical seismic isolating member 152: horizontal seismic isolating member
152a: hemispherical protrusion
160: cylindrical seismic isolation member
170: escape prevention member
171: escape prevention bolt 171a: bolt head
171b: bolt body 172: nut for separation prevention

Claims (4)

In the seismic device for the solar cell module installation structure to be installed between the pillar supporting the solar cell module frame and the pile fixed to the ground:
an upper plate cylinder extending downward from the lower surface of the upper plate and comprising a cylindrical upper cylinder having an open lower end;
a lower plate cylinder comprising a lower plate and a lower cylinder extending upward from the upper surface of the lower plate and spaced apart from the inner side of the upper cylinder to face the upper cylinder in a cylindrical shape;
a spring provided inside the lower cylinder;
It is provided at the upper end of the spring, and is provided to be movable up and down along the inner circumferential surface of the lower cylinder while sealing the open upper end of the lower cylinder to form a cylinder chamber that is a sealed space in the lower cylinder, the upper end of the lower cylinder A lower disc-shaped damper plate positioned lower, a disc-shaped damper upper plate spaced upward from the damper lower plate and positioned higher than the upper end of the lower cylinder, and an inner edge connecting the edge of the lower damper plate and the edge of the damper upper plate and a cylindrical damper side plate forming a buffer chamber in the damper, a plurality of orifices communicating the buffer chamber and the cylinder chamber are formed on the lower damper plate, and a plurality of air communicating the buffer chamber and the outside is formed on the damper side plate Damper where the entrance is formed;
A vertical seismic isolating member, which is a rubber plate fixedly provided on the upper surface of the damper upper plate, and a metal plate laminated on the upper part of the vertical seismic isolator, which protrude upward to reduce a contact surface with the upper plate, and have a plurality of hemispherical protrusions formed A plate-shaped seismic isolating member made to include and positioned higher than the upper end of the lower cylinder;
a cylindrical seismic isolator which is a rubber elastic body provided along the outer circumferential surface of the lower cylinder;
a plurality of separation preventing members having an upper end mounted on the upper plate and a lower end mounted on the lower plate to prevent the upper plate cylinder from being separated from the lower plate cylinder;
Seismic device for solar cell module installation structure, characterized in that it comprises a.
The method of claim 1,
The orifice has a shape in which the cross-sectional area is gradually reduced while extending from the cylinder chamber toward the buffer chamber, the air inlet is inclined upwardly toward the radially outward side, and a desiccant is provided in the buffer chamber. Seismic device for modular installation structures.
The method of claim 1 , wherein:
The separation preventing member includes a bolt body penetrating the upper plate through hole formed in the upper plate and the lower plate through hole formed in the lower plate, and a bolt head formed at the upper end of the bolt body and seated on the upper surface of the upper plate. and a nut for preventing separation while being screwed to the bolt body and seated on the lower surface of the lower plate; a bushing for a through-hole, which is a rubber elastic body, is provided in a through-hole of the upper plate to prevent micro-movement of the bolt body; Seismic device for solar cell module installation structure, characterized in that.
The method of claim 1,
A cylinder bushing having a lubricating function is mounted on the inner circumferential surface of the lower cylinder, and an O-ring in close contact with the cylinder bushing is mounted on the damper side plate of the damper, and the damper moves up and down along the cylinder bushing while sealing the cylinder chamber. Seismic device for solar cell module installation structure, characterized in that possible.

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