A double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks

Abstract

The present invention relates to a seismic isolation device for major lifeline projects, and particularly to a double-layer three-dimensional seismic isolation system suitable for high-lift storage tank structures, which includes a storage tank, an upper seismic isolation system, a high-lift, a lower seismic isolation system, and a bottom structural foundation arranged in sequence. The upper seismic isolation system includes a vertical sliding mechanism provided with square rubber shock-absorbing bearings, a bidirectional horizontal sliding mechanism connected in series with the vertical sliding mechanism, and a locking system connected to the bidirectional horizontal sliding mechanism; the lower seismic isolation system includes pin-key bearings and second peripheral seismic isolation bearings. For the seismic isolation system of the present invention, when an earthquake within the design earthquake occurs, the upper seismic isolation system and the lower seismic isolation system bear the vertical load, and the upper seismic isolation system dissipates seismic energy and has an anti-torsion function. When an earthquake exceeding the design earthquake occurs, the lower seismic isolation system will continue to play a horizontal shock-absorbing function. The functions of each seismic isolation mechanism of the seismic isolation system of the present invention are clear and obvious, and it is maintenance-free throughout the process.

Description

Technical Field

[0001] The present invention relates to a seismic isolation device for major lifeline projects, belonging to the technical field of lifeline engineering, and particularly relates to a double-layer three-dimensional seismic isolation system suitable for high-lift storage tank structures. Background Art

[0002] The laminated rubber seismic isolation technology mainly reduces the seismic action of the isolated structure significantly by prolonging the structural period and increasing the damping. With the popularization of seismic isolation technology, laminated rubber seismic isolation, as a relatively mature seismic isolation technology, has been widely applied to the fields of buildings, bridges and equipment engineering. The high-lift storage tank structure, as a special lifeline engineering project, has a liquid storage tank at the top and a support structure at the bottom. Such structures are prone to damage during earthquakes due to their top-heavy and bottom-light characteristics. When the storage tank stores flammable liquids, when the structure collapses, it is likely to cause secondary disasters - fires, and the consequences will be immeasurable. To reduce its earthquake disasters, the laminated rubber seismic isolation technology has been applied to high-lift storage tank structures at present. However, generally, a single seismic isolation layer is used more, and it is only used for horizontal seismic isolation. Under the design earthquake action, it can reduce the horizontal earthquake action to a certain extent. However, when an earthquake exceeding the design earthquake occurs, the laminated rubber seismic isolation bearings in the single-layer seismic isolation structure will lose the functions of vertical load-bearing and horizontal shock absorption due to excessive deformation, resulting in the collapse and damage of the structure. At the same time, when a vertical earthquake occurs, ordinary laminated rubber seismic isolation bearings do not have the function of vertical shock absorption. To solve the above problems, a special seismic isolation system is needed, that is, under the design earthquake, the ordinary seismic isolation device can play a good role in reducing its seismic action. When an earthquake exceeding the design earthquake occurs, another special seismic isolation system starts to play a role and continues to bear the shock absorption function to prevent the high-lift storage tank device from collapsing. At the same time, it also needs to have the function of vertical shock absorption in the vertical direction. Summary of the Invention

[0003] The purpose of this patent is to provide a double-layer three-dimensional seismic isolation system suitable for high-lift storage tank structures, which not only has a normal horizontal seismic isolation function under the design earthquake, but also can continue to play the horizontal shock absorption function and still maintain the vertical shock absorption function in the case of a super-large earthquake.

[0004] The present invention realizes this purpose through the following technical solutions:

[0005] A double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks, comprising a storage tank, an upper seismic isolation system, a high-lift frame, a lower seismic isolation system and a bottom structural foundation. The upper seismic isolation system includes a plurality of square vertical sliding mechanisms, a plurality of bidirectional horizontal sliding mechanisms and a locking system. A square rubber shock isolation bearing is arranged inside the vertical sliding mechanism. The top of the vertical sliding mechanism is connected to the storage tank. The bottom of the bidirectional horizontal sliding mechanism is connected to the high-lift frame. The vertical sliding mechanism and the bidirectional horizontal sliding mechanism are connected in series to form a first peripheral seismic isolation bearing. The locking system is connected to the bidirectional horizontal sliding mechanism. The lower seismic isolation system includes a pin-key bearing and a plurality of second peripheral seismic isolation bearings. The second peripheral seismic isolation bearings are arranged around the pin-key bearing. The second peripheral seismic isolation bearing includes a top plate, a rubber shock isolation bearing and a bottom plate. The rubber shock isolation bearing is arranged between the top plate and the bottom plate. The top plate and the top of the pin-key bearing are connected to the high-lift frame. The bottom plate and the bottom of the pin-key support are connected to the bottom structural foundation.

[0006] Furthermore, the upper seismic isolation system further includes a middle seismic isolation bearing. The middle seismic isolation bearing includes a lower steel plate, a middle cylinder, a circular thick-layer rubber bearing and a top cover. The middle cylinder can slide horizontally relative to the lower steel plate. The circular thick-layer rubber bearing is arranged inside the middle cylinder. The top cover can slide vertically relative to the middle cylinder. The lower part of the top cover is in contact with the circular thick-layer rubber bearing. The top of the top cover is connected to the storage tank. The bottom of the lower steel plate is connected to the high-lift frame. One end of the locking system is connected to the middle cylinder.

[0007] Furthermore, the upper seismic isolation system further includes a horizontal spring system. The locking system is arranged inside the horizontal spring system. The locking system is respectively connected to the middle cylinder and the bidirectional horizontal sliding mechanism through the horizontal spring system.

[0008] Preferably, a stainless steel mirror panel is arranged on the lower steel plate. A horizontal polytetrafluoroethylene plate is embedded at the bottom of the middle cylinder. A vertical annular polytetrafluoroethylene plate is arranged on the inner side wall of the upper part of the middle cylinder. The top cover slides up and down along the vertical annular polytetrafluoroethylene plate.

[0009] Preferably, the locking system includes an outer cylinder, an inner cylinder and a pin mechanism for locking the inner cylinder and the outer cylinder. A convex block is arranged on the inner cylinder. A chute adapted to the convex block is arranged on the inner side wall of the outer cylinder. The inner cylinder can slide inside the outer cylinder.

[0010] Preferably, a first slot and a second slot are arranged on the inner cylinder. The pin mechanism includes a spring pin one and a spring pin two with inclined surfaces on the top. The spring pin one is arranged in the first slot. The spring pin two is arranged in the second slot. A through hole through which the spring pin one or the spring pin two passes is arranged on the outer cylinder. In the non-working state, the spring pin one is in a free state and the spring pin two is in a compressed state.

[0011] Further, the second peripheral isolation bearing further includes a top U-shaped arm with an upward opening and a bottom U-shaped arm with a downward opening. The top U-shaped arm and the bottom U-shaped arm are connected in series. The top of the top U-shaped arm is connected to the top plate, and the bottom of the bottom U-shaped arm is connected to the bottom plate.

[0012] Further, the bidirectional horizontal sliding mechanism includes two slide rail structures with mutually perpendicular sliding directions. Each slide rail structure includes an upper platform, a lower platform, a slider, and a slide rail. The slider is connected to the upper platform, the slide rail is connected to the lower platform, and the slider slides on the slide rail.

[0013] Further, the lower isolation system further includes a middle support bearing. The middle support bearing includes a cylinder body and a top buffer rubber block that can slide inside the cylinder body. The bottom of the middle support bearing is connected to the bottom structure foundation, and there is a gap between the top of the middle support bearing and the bottom of the high-lift rack.

[0014] Further, the pin-key bearing includes a bearing top plate, a bearing bottom plate, and a plurality of concave plates arranged between the bearing top plate and the bearing bottom plate. The concave plates are evenly distributed around the central axis.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The double-layer three-dimensional isolation system suitable for the high-lift storage tank structure of the present invention. During an earthquake within the design earthquake intensity of the high-lift storage tank structure, the upper isolation system and the lower isolation system respectively bear the vertical loads transmitted from the storage tank and the high-lift rack. The upper isolation system simultaneously undergoes shear deformation in the horizontal direction to consume seismic energy and ensure the safety of the upper storage tank structure. At this time, the lower isolation system does not deform horizontally. When the high-lift storage tank structure undergoes an earthquake beyond the design earthquake intensity, when the upper isolation system reaches its maximum horizontal deformation capacity, it will no longer undergo horizontal deformation, and the lower isolation system will be activated to continue to play the function of horizontal shock absorption and prevent the collapse of the overall high-lift storage tank structure.

[0017] 2. The double-layer three-dimensional isolation system suitable for the high-lift storage tank structure of the present invention. Whether the earthquake occurs within or beyond the design earthquake intensity, the sliding mechanism of the vertical isolation system in the upper isolation system will play the function of vertical shock absorption and reduce the vertical seismic action of the overall structure.

[0018] 3. The double-layer three-dimensional isolation system suitable for the high-lift storage tank structure of the present invention. The vertical sliding mechanism in the upper isolation system is square-shaped and has the function of resisting torsion during an earthquake. In the isolation system of the present invention, the functions of each isolation mechanism in the upper isolation system and the lower isolation system are clear, and no maintenance is required throughout the process. Description of the Drawings

[0019] Figure 1 This is a schematic structural diagram of the seismic isolation device of the present invention.

[0020] Figure 2 It is Figure 1 a schematic structural diagram of the upper seismic isolation system in

[0021] Figure 3 It is Figure 1 a schematic structural diagram of the lower seismic isolation system in

[0022] Figure 4 It is Figure 2 a schematic structural diagram of the vertical sliding mechanism in

[0023] Figure 5 It is Figure 4 a sectional view of

[0024] Figure 6 It is Figure 2 a schematic structural diagram of the bidirectional sliding rail mechanism in

[0025] Figure 7 It is Figure 2 a schematic structural diagram of the middle seismic isolation bearing in

[0026] Figure 8 It is Figure 7 a sectional view of

[0027] Figure 9 It is Figure 2 a schematic structural diagram of the horizontal spring system in

[0028] Figure 10 It is Figure 2 a schematic structural diagram of the locking system in

[0029] Figure 11 It is Figure 10 a schematic structural diagram of the outer cylinder in

[0030] Figure 12 It is Figure 10 a schematic structural diagram of the inner cylinder in

[0031] Figure 13 It is Figure 10 a schematic structural diagram of the pin mechanism in

[0032] Figure 14 It is Figure 3 a schematic structural diagram of the second peripheral seismic isolation bearing in

[0033] Figure 15 It is Figure 3 a schematic structural diagram of the middle support bearing in

[0034] Figure 16 It isFigure 3 Structural schematic diagram of the middle pin key support Specific implementation mode

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments

[0036] Embodiment 1

[0037] As Figure 1-3 shown, a double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks includes a storage tank 1, an upper seismic isolation system 3, a high-lift 5, a lower seismic isolation system 7 and a bottom structure foundation 8. The upper seismic isolation system 3 includes a plurality of square vertical sliding mechanisms 31, a plurality of bidirectional horizontal sliding mechanisms 32 and a locking system 35. A square rubber shock isolation support 315 is arranged in the vertical sliding mechanism 31. The top of the vertical sliding mechanism 31 is connected to the storage tank 1. The bottom of the bidirectional horizontal sliding mechanism 32 is connected to the high-lift 5. The vertical sliding mechanism 31 and the bidirectional horizontal sliding mechanism 32 are connected in series to form a first peripheral seismic isolation support. The locking system 35 is connected to the bidirectional horizontal sliding mechanism 32 to limit the further sliding of the bidirectional horizontal sliding mechanism 32. The lower seismic isolation system 7 includes a pin key support 73 arranged between the high-lift 5 and the bottom structure foundation 8 and a plurality of second peripheral seismic isolation supports 71. As Figure 14 shown, the second peripheral seismic isolation support 71 includes a top plate 711, a rubber shock isolation support 715 and a bottom plate 713. The rubber shock isolation support 715 is arranged between the top plate 711 and the bottom plate 713. The top plate 711 and the top of the pin key support 73 are connected to the high-lift 5. The bottom plate 713 and the bottom of the pin key support 73 are connected to the bottom structure foundation 8. The second peripheral seismic isolation support 71 is arranged around the pin key support 73

[0038] The double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks of the present invention includes an upper seismic isolation system 3 and a lower seismic isolation system 7. When an earthquake within the design earthquake intensity occurs, the upper seismic isolation system 3 and the lower seismic isolation system 7 bear the vertical load simultaneously, and the bidirectional horizontal sliding mechanism 32 undergoes horizontal bidirectional sliding, and shear deformation occurs in the horizontal direction to consume seismic energy and ensure the safety of the upper storage tank 1 structure. At this time, the lower seismic isolation system 7 does not deform horizontally; when a vertical earthquake occurs, the vertical sliding mechanism 31 will undergo vertical deformation to play a vertical shock-absorbing function; when an earthquake exceeding the design intensity occurs, the locking system 35 is activated to limit the further sliding of the bidirectional horizontal sliding mechanism 32 in the upper seismic isolation system 3, and the upper seismic isolation system 3 no longer works in the horizontal direction; at this time, the seismic shear force of the overall structure will be transmitted to the lower seismic isolation system 7, and the shear key support 73 will be cut off first, and the rubber seismic isolation bearing 715 in the peripheral seismic isolation bearings 71 located around will undergo horizontal deformation to continue to play a horizontal shock-absorbing function. At this time, the vertical sliding mechanism 31 in the upper seismic isolation system 3 still continues to play a vertical shock-absorbing function. In addition, the vertical sliding mechanism 31 in the upper seismic isolation system 3 is square in design and has an anti-torsion function during an earthquake. In the seismic isolation system of the present invention, the functions of each seismic isolation mechanism in the upper and lower seismic isolation systems are clear and maintenance-free throughout the process.

[0039] Among them, as Figure 2 and Figure 7-9 show, the upper seismic isolation system 3 further includes a middle seismic isolation bearing 33 and a horizontal spring system 34. The middle seismic isolation bearing 33 includes a lower steel plate 336, a middle cylinder 333, a circular thick-layer rubber bearing 337 and a top cover 331. The middle cylinder 333 can slide horizontally relative to the lower steel plate 336. The circular thick-layer rubber bearing 337 is arranged in the middle cylinder 333. The top cover 331 can slide vertically relative to the middle cylinder 333. The lower part of the top cover 331 contacts the circular thick-layer rubber bearing 337. The top of the top cover 331 is connected to the storage tank 1. The bottom of the lower steel plate 336 is connected to the high-lift rack 5. The two ends of the horizontal spring system 34 are respectively connected to the side of the middle cylinder 333 and the bidirectional horizontal sliding mechanism. When an earthquake within the design intensity occurs, in addition to the horizontal sliding of the bidirectional horizontal sliding mechanism, the sliding friction between the lower steel plate and the middle cylinder will also generate horizontal energy consumption, further playing a role in consuming seismic energy. When a vertical earthquake occurs, whether it is an earthquake within or outside the design range, the circular thick-layer rubber bearing 337 in the middle seismic isolation bearing 33 will also undergo vertical deformation, and together with the vertical sliding mechanism, it will jointly play a vertical shock-absorbing function.

[0040] The locking system 35 is disposed inside the horizontal spring system 34. The horizontal spring system includes a left connecting plate 341, a spring 342, and a right connecting plate 343. The locking system 35 is inside the spring 342 and is connected to the left connecting plate 341 and the right connecting plate 343 at both ends respectively. Through the left connecting plate 341 and the right connecting plate 343, it is further connected to the middle cylinder 333 and the bidirectional horizontal sliding mechanism 32 respectively. When an earthquake within the design intensity occurs, the horizontal spring system 34 will provide a restoring force for the bidirectional horizontal sliding mechanism 32. When an earthquake exceeding the design intensity occurs, the horizontal spring system 34 undergoes excessive tensile deformation (or excessive compressive deformation). At this time, the locking system 35 inside the spring 342 will be locked during the tensile or compressive process, restricting the further sliding of the bidirectional horizontal sliding mechanism 32 and the middle cylinder 333. The shock absorption function of the upper isolation system 3 in the horizontal direction disappears, and the seismic shear force of the overall structure will be transmitted to the lower isolation system 7.

[0041] Wherein, a stainless steel mirror panel 335 is provided on the lower steel plate 336, a horizontal polytetrafluoroethylene plate 334 is embedded at the bottom of the middle cylinder 333, a vertical annular polytetrafluoroethylene plate 332 is provided on the inner side wall of the upper part of the middle cylinder 333, and the top cover 331 slides up and down along the vertical annular polytetrafluoroethylene plate 332. The design of the horizontal polytetrafluoroethylene plate 334 and the vertical annular polytetrafluoroethylene plate 332 can reduce friction, and energy consumption will occur when sliding friction occurs between them and other components.

[0042] Wherein, as Figure 10-13 shown, the locking system 35 includes an outer cylinder 351, an inner cylinder 352, and a pin mechanism for locking the inner cylinder 352 and the outer cylinder 351. A convex block 3521 is provided on the inner cylinder 352, and a chute adapted to the convex block 2521 is provided on the inner side wall of the outer cylinder 351. The inner cylinder 352 can slide inside the outer cylinder 351. When the inner cylinder 352 slides relative to the outer cylinder 351 to the pin mechanism, the pin mechanism will be activated to restrict the further sliding of the inner cylinder 352 and the outer cylinder 351, thereby restricting the further sliding of the bidirectional horizontal sliding mechanism 32 and the middle cylinder 333, resulting in the disappearance of the shock absorption function of the upper isolation system 3 in the horizontal direction.

[0043] In this embodiment, a first slot hole 3522 and a second slot hole 3523 are provided on the inner cylinder 352. The pin mechanism includes a first spring pin 353 and a second spring pin 354 with inclined surfaces on their top surfaces. The first spring pin 353 is disposed in the first slot hole 3522, and the second spring pin 354 is disposed in the second slot hole 3523. A through hole 3511 through which the first spring pin 353 or the second spring pin 354 passes is provided on the outer cylinder 351. The first spring pin 353 is in the first slot hole 3522, and its inclined surface is disposed relative to the outer cylinder 351. In the non-operating state, the first spring pin 353 is in a free state, and the second spring pin 354 is pressed into the inner part of the inner cylinder 352 by the outer cylinder 351 and is in a compressed state. When the locking system 35 is gradually compressed, the outer cylinder 351 presses the first spring pin 353 into the first slot hole 3522, and the first spring pin 353 is in a compressed state. When the through hole 3511 coincides with the first slot hole 3522, the first spring pin 353 pops out, thereby locking the outer cylinder 351 and the inner cylinder 352 and restricting their further sliding. When the locking system 35 is gradually stretched, the through hole 3511 coincides with the second slot hole 3523, and the second spring pin 354 pops out, thereby locking the outer cylinder 351 and the inner cylinder 352.

[0044] In this embodiment, as Figure 4-5 shown, the vertical sliding mechanism 31 includes an upper cylinder 311 and a lower cylinder 312 that can slide relative to each other. Both the lower cylinder 311 and the lower cylinder 312 are square structures. The square rubber shock absorber 315 is disposed in the lower cylinder 312. The lower cylinder 311 is connected to the bidirectional horizontal sliding mechanism 32. The top of the upper cylinder is connected to the storage tank 1. The vertical sliding mechanism 31 is a square structure. Combining with the horizontal spring system 34 and the locking system 35, it can play a function of preventing torsion.

[0045] Among them, as Figure 6 shown, the bidirectional horizontal sliding mechanism 32 includes two rail structures with perpendicular sliding directions. The rail structure includes an upper platform 321(324), a lower platform 323(326), sliders 327(328) and rails 322(325). The sliders 327(328) are connected to the upper platform 321(324), and the rails 322(325) are connected to the lower platform 323(326). The sliders 327(328) slide on the rails 322(325), and the upper isolation system 3 can slide arbitrarily in the horizontal direction.

[0046] In this embodiment, as Figure 14As shown in the figure, the second peripheral isolation bearing 71 further includes a top U-shaped arm 712 with an upward opening and a bottom U-shaped arm 714 with a downward opening. The top U-shaped arm 712 and the bottom U-shaped arm 714 are connected in series. The top of the top U-shaped arm 712 is connected to the top plate 711, and the bottom of the bottom U-shaped arm 714 is connected to the bottom plate 713. When an earthquake exceeding the design intensity occurs, the overall structure may be lifted off. Due to the series connection of the top U-shaped arm 712 and the bottom U-shaped arm 714, the two will play a tensile function.

[0047] Among them, as Figure 15 shown in the figure, the lower isolation system 7 further includes a middle support bearing 72. The middle support bearing 72 includes a cylinder 722 and a top buffer rubber block 721 that can slide within the cylinder 722. The bottom of the middle support bearing 72 is connected to the bottom structure foundation 8, and there is a gap between the top of the middle support bearing 72 and the bottom of the high-lift rack 5. At the same time, due to the large horizontal deformation, the upper structure of the lower isolation system 7 may partially drop after the isolation rubber bearing 715 undergoes a large horizontal deformation. At this time, the middle support bearing 72 will play the function of bearing the vertical load to prevent the overall collapse of the isolation structure.

[0048] Among them, as Figure 16 shown in the figure, the pin-key bearing 73 includes a bearing top plate 731, a bearing bottom plate 733, and a plurality of concave plates 732 arranged between the bearing top plate 731 and the bearing bottom plate 733. The concave plates 732 are evenly distributed around the central axis. Due to the design of the pin-key bearing 73, when an earthquake within the design range occurs, the lower isolation system 7 does not provide an energy dissipation function. When an earthquake exceeding the design intensity occurs, the horizontal energy dissipation function of the upper isolation system 3 disappears, and the lower isolation system 7 will bear the shock absorption function. Due to the structural design of the concave plates 732, they will break first, and the second peripheral isolation bearing 71 plays an isolation role.

[0049] The installation method of the double-layer three-dimensional isolation system suitable for the high-lift storage tank structure of the present invention is:

[0050] 1. First, assemble the lower isolation system 7 on the bottom structure foundation 8. Assemble the support top plate 731, the middle concave plate 732, and the support bottom plate 733 of the pin joint support 73 into a whole by welding, and connect the support bottom plate 733 to the bottom structure foundation 8 with bolts. Place the top buffer rubber block 721 of the middle support support 72 into the concave hole at the top of the outer cylinder 722, and connect the bottom of the outer cylinder 722 to the bottom structure foundation 8 with bolts to form the whole middle support support 72. Connect the bottom plate 713 in the peripheral isolation support 71 to the bottom of the rubber isolation support 715 and the bottom U-shaped arm 714, connect the lower part of the bottom plate 713 to the bottom structure foundation 8, connect the top U-shaped arm 712 in series with the bottom U-shaped arm 714, and bolt the top U-shaped arm 714, the top of the rubber isolation support 715, and the top plate 711 together. Finally, there is a certain gap in the vertical direction between the top plate 711, the support top plate 731 and the bottom of the high-lift rack 5, while there is a certain gap in the vertical direction between the top buffer rubber block 721 of the middle support support 72 and the bottom of the high-lift rack 5.

[0051] Install the upper isolation system 3 on the top surface of the high-lift rack 5. Connect the lower steel plate 336 of the middle isolation support 33 to the middle position at the top of the high-lift rack 5 with bolts; place the stainless steel mirror panel 335 on the top of the lower steel plate 336 and weld the contacting parts around them. Place the horizontal polytetrafluoroethylene plate 334 in the middle part of the stainless steel mirror panel 335, embed the horizontal polytetrafluoroethylene plate 334 into the lower concave hole of the middle cylinder 333, place the circular thick-layer rubber support 337 into the inner cylinder of the middle cylinder 333, stick the vertical annular polytetrafluoroethylene plate 332 on the inner side wall at the top of the middle cylinder 333, and finally place the top cover 331. The side wall of the top cover 331 contacts the vertical annular polytetrafluoroethylene plate 332, and the lower part of the top cover 331 contacts and connects with the circular thick-layer rubber support 337. After installing the bidirectional horizontal sliding mechanism 32 and placing it at the peripheral part of the top surface of the high-lift rack 5, connect the bottom of the lower cylinder 312 of the vertical sliding mechanism 31 to the top of the bidirectional horizontal sliding mechanism 32 with bolts, place the square rubber shock-absorbing support 315 into the lower cylinder 312, paste the annular square polytetrafluoroethylene plate on the inner side wall at the top of the inner cylinder of the lower cylinder 312, and finally place the upper cylinder 311. Embed the spring 342 inner locking system 3-5 assembled by the outer cylinder 351, the inner cylinder 352, the spring pin 353, and the spring pin 354 into the horizontal spring system 34, and connect the two ends of the horizontal spring system 34 to the lower platform 326 of the bidirectional horizontal sliding mechanism 32 and the middle cylinder 336 of the middle isolation support 33 with bolts respectively.

[0052] Finally, connect the top cover 331 of the middle isolation support 33 and the top of the upper cylinder 311 of the vertical isolation support 31 to the bottom of the storage tank 1 to form a complete double-layer three-dimensional isolation suitable for the high-lift rack storage tank structure.

[0053] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; within the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks, comprising a storage tank, a high-lift frame, and a bottom structural foundation, characterized in that, It also includes: An upper isolation system, which includes a plurality of square vertical sliding mechanisms, a plurality of bidirectional horizontal sliding mechanisms and a locking system. A square rubber shock isolation bearing is arranged in the vertical sliding mechanism. The top of the vertical sliding mechanism is connected to the storage tank. The bottom of the bidirectional horizontal sliding mechanism is connected to the high-lift rack. The vertical sliding mechanism and the bidirectional horizontal sliding mechanism are connected in series to form a first peripheral isolation bearing. The locking system is connected to the bidirectional horizontal sliding mechanism; A lower isolation system, which includes a pin-key bearing and a plurality of second peripheral isolation bearings. The second peripheral isolation bearings are arranged around the pin-key bearing. The second peripheral isolation bearing includes a top plate, a rubber isolation bearing and a bottom plate. The rubber isolation bearing is arranged between the top plate and the bottom plate. The top plate and the top of the pin-key bearing are connected to the high-lift rack. The bottom plate and the bottom of the pin-key support are connected to the bottom structural foundation; The upper isolation system also includes a horizontal spring system. The locking system is arranged in the horizontal spring system. The locking system includes an outer cylinder, an inner cylinder and a pin mechanism for locking the inner cylinder and the outer cylinder. A convex block is arranged on the inner cylinder. A chute adapted to the convex block is arranged on the inner side wall of the outer cylinder. The inner cylinder can slide in the outer cylinder; A first slot hole and a second slot hole are arranged on the inner cylinder. The pin mechanism includes a first spring pin and a second spring pin with an inclined top surface. The first spring pin is arranged in the first slot hole. The second spring pin is arranged in the second slot hole. A through hole through which the first spring pin or the second spring pin passes is arranged on the outer cylinder. In the non-working state, the first spring pin is in a free state and the second spring pin is in a compressed state.

2. The double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks as described in claim 1, characterized in that, The upper isolation system also includes a middle isolation bearing, which includes a lower steel plate, a middle cylinder, a circular thick-layer rubber bearing and a top cover. The middle cylinder can slide horizontally relative to the lower steel plate. The circular thick-layer rubber bearing is arranged in the middle cylinder. The top cover can slide vertically relative to the middle cylinder. The lower part of the top cover is in contact with the circular thick-layer rubber bearing. The top of the top cover is connected to the storage tank. The bottom of the lower steel plate is connected to the high-lift rack. The locking system is connected to the middle cylinder and the bidirectional horizontal sliding mechanism respectively through the horizontal spring system.

3. The double-layer three-dimensional seismic isolation system suitable for the high-lift storage tank structure according to claim 2, characterized in that, A stainless steel mirror panel is arranged on the lower steel plate. A horizontal polytetrafluoroethylene plate is embedded at the bottom of the middle cylinder. A vertical annular polytetrafluoroethylene plate is arranged on the inner side wall of the upper part of the middle cylinder. The top cover slides up and down along the vertical annular polytetrafluoroethylene plate.

4. The double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks as described in claim 1, characterized in that, The second peripheral isolation bearing also includes a top U-shaped arm with an upward opening and a bottom U-shaped arm with a downward opening. The top U-shaped arm and the bottom U-shaped arm are connected in series. The top of the top U-shaped arm is connected to the top plate. The bottom of the bottom U-shaped arm is connected to the bottom plate.

5. The double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks according to claim 1, characterized in that, The bidirectional horizontal sliding mechanism includes two rail structures with perpendicular sliding directions. Each rail structure includes an upper platform, a lower platform, a slider and a rail. The slider is connected to the upper platform. The rail is connected to the lower platform. The slider is slidably arranged on the rail.

6. The double-layer three-dimensional seismic isolation system suitable for the structure of high-lift storage tanks as described in claim 1, characterized in that, The lower isolation system further includes a middle support bearing, which includes a cylinder and a top buffer rubber block that can slide within the cylinder. The bottom of the middle support bearing is connected to the bottom structure foundation, and there is a gap between the top of the middle support bearing and the bottom of the high-lift rack.

7. The double-layer three-dimensional seismic isolation system suitable for the high-lift storage tank structure according to claim 1, characterized in that, The pin-key bearing includes a bearing top plate, a bearing bottom plate, and a plurality of concave plates disposed between the bearing top plate and the bearing bottom plate. The concave plates are evenly distributed around the central axis.

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