A vertical seismic isolation device

Abstract

The present invention relates to a vertical seismic isolation device for protecting structures or non-structural objects sensitive to the vertical component of seismic waves. The device includes: a first support plate and a second support plate arranged in parallel; a first seismic isolation module and a second seismic isolation module disposed between the first support plate and the second support plate. The first seismic isolation module includes: a support sleeve connected to the second support plate; a compression sleeve connected to the first support plate and abutted against the support sleeve; a central rod respectively cooperatively connected with the support sleeve and the compression sleeve, and the central rod is connected to the first support plate. The second seismic isolation module includes: a first connecting arm and a second connecting arm respectively movably connected to the first support plate and the second support plate; a spring belt group respectively connected to the first connecting arm and the second connecting arm. Compared with the prior art, the present invention has the advantages of simple composition structure, convenient replacement of elastic structures, and wide application scenarios, etc.

Description

Technical Field

[0001] The present invention relates to the field of earthquake prevention and disaster reduction research, and particularly to a vertical isolation device. Background Art

[0002] With the increasing attention paid to seismic isolation and damping design, different seismic isolation and damping technologies have emerged continuously. At present, structural isolation bearing devices are all elastomeric devices or friction devices, and most of these isolation devices provide horizontal isolation for structures. Although these isolation devices have verified the application of elastomeric technology in the lateral horizontal isolation of structures, the vertical component of seismic action still directly transmits to the structure, causing damage to the structure. According to the seismic ground motion data recorded at home and abroad, in the near-fault earthquake area, the vertical component of seismic ground motion is very strong, and the peak acceleration even exceeds the horizontal peak value. Therefore, a vertical isolation device is needed to protect structures that are sensitive to the influence of the vertical component of earthquake. Some industrial equipment that requires high-frequency vibration also needs a vertical isolation device for protection and maintenance, while most of the current design and research of vertical isolation devices are for buildings.

[0003] Chinese Patent Application Publication Specification CN114135138A discloses a device for vertical vibration isolation and horizontal seismic isolation for buildings, including a horizontal seismic isolation mechanism, a vertical vibration isolation mechanism and a fixing mechanism. Among them, the vertical vibration isolation mechanism is mainly composed of a plurality of springs, and the specific parameters of the springs are determined according to the characteristics of the protected building. This invention can not only isolate the vibration in the vertical direction, but also isolate the seismic action in the horizontal direction. However, the main protection object of this invention is buildings. When the springs are damaged or lose their mechanical properties, the springs need to be replaced, and the springs are wrapped by the fixing mechanism and are not easy to replace. Therefore, it is not suitable for other application scenarios.

[0004] Chinese Patent Application Publication Specification CN114857210A discloses a constant force spring type vertical isolator, which uses a constant force spring to balance the gravity of the upper structure. Select a suitable constant force spring according to the gravity of the isolated structure, select a reasonable vertical isolation frequency, and use a stiffness adjustment spring to adjust the natural vibration frequency of the isolator. Under the action of vertical earthquake, the stiffness adjustment spring plays an isolation role, and the constant force spring plays a role in balancing the gravity of the upper structure, which can not only reduce the vertical seismic response of the structure, but also solve the problem that it is difficult to balance the gravity of the upper structure in vertical isolation. However, the types of structural components of this invention are more, the disassembly and assembly process is complex, and the constant force spring is not easy to replace.

[0005] Chinese Patent Application Publication Specification CN110130500A discloses an air spring-friction pendulum multi-dimensional isolation bearing, which mainly uses an air spring to achieve the vertical isolation function. However, the air spring is in an inflated state for a long time, and there is a possibility of air leakage, which will affect the performance of the device.

[0006] In summary, the current existing vertical seismic isolation devices have the following problems:

[0007] (1) Most of the seismic isolation devices are non-detachable. Once assembled, they are no longer disassembled. The structure of the device is relatively complex, there are components that are not easy to disassemble and assemble, and the versatility of the seismic isolation device is low;

[0008] (2) Some seismic isolation devices use air springs to achieve seismic isolation. However, there is a possibility of air leakage after long-term use of the air springs, and the performance of the seismic isolation device deteriorates;

[0009] (3) For the seismic isolation device using a spring structure, it is not easy to replace after the spring structure is damaged or loses its mechanical properties, and it is not convenient to replace for different protection objects, and the applicable application scenarios are limited. Summary of the Invention

[0010] The purpose of the present invention is to overcome the above-mentioned defects existing in the prior art and provide a vertical seismic isolation device that can conveniently replace the spring structure and is convenient for assembly and disassembly.

[0011] The purpose of the present invention can be achieved by the following technical solutions:

[0012] According to one aspect of the present invention, there is provided a vertical seismic isolation device, including: a first support plate and a second support plate arranged in parallel; a first seismic isolation module and a second seismic isolation module disposed between the first support plate and the second support plate. The first seismic isolation module includes: a support sleeve connected to the second support plate; a compression sleeve connected to the first support plate and abutting against the support sleeve; a central rod respectively connected to the support sleeve and the compression sleeve in a mating manner, and the central rod is connected to the first support plate. The second seismic isolation module includes: a first connecting arm and a second connecting arm respectively movably connected to the first support plate and the second support plate; a spring belt group respectively connected to the first connecting arm and the second connecting arm.

[0013] As a preferred technical solution, the first connecting arm and the second connecting arm have the same structure, including a first connecting rod, a second connecting rod, a first friction rod and a second friction rod. Among them, the first connecting rod is respectively movably connected to the first support plate and the second connecting rod, the second connecting rod is movably connected to the second support plate, the first friction rod is disposed on one side of the first connecting rod close to the second support plate, the second friction rod is disposed on one side of the second connecting rod close to the first support plate, and the spring belt group is connected to the friction rods on the first connecting arm and the second connecting arm.

[0014] As a preferred technical solution, the spring belt group realizes the connection between the following components: the first friction rod of the first connecting arm and the first friction rod of the second connecting arm; the second friction rod of the first connecting arm and the second friction rod of the second connecting arm.

[0015] As a preferred technical solution, the first connecting rod and the second connecting rod are connected by a hinge joint, the first connecting rod and the first support plate are connected by a hinge joint, and the second connecting rod and the second support plate are connected by a hinge joint.

[0016] As a preferred technical solution, the hinge joint includes a bolt and a plurality of connecting plates. One end of a single connecting plate has an opening matching the bolt, and the other end is welded or integrally formed with the connecting object. The connecting plate is connected in cooperation with the bolt.

[0017] As a preferred technical solution, the first shock isolation module further includes a bushing respectively connected in cooperation with the central rod and the support sleeve, and is located on one side of the support sleeve close to the first support plate.

[0018] As a preferred technical solution, the central rod, the support sleeve, the compression sleeve and the bushing are coaxially placed.

[0019] As a preferred technical solution, the materials of the first support plate, the second support plate, the central rod, the first connecting arm, the second connecting arm and the hinge joint are steel.

[0020] As a preferred technical solution, the hinge joint between the first support plate and the connecting arm is integrally formed or welded, and the hinge joint between the second support plate and the connecting arm is integrally formed or welded.

[0021] As a preferred technical solution, the materials of the compression sleeve, the bushing and the spring belt group are rubber.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) Simple structure, convenient for assembly and disassembly. The present invention is composed of two support plates and two shock isolation modules. One shock isolation module includes a central rod, a compression sleeve and a support sleeve, and the other shock isolation module includes two connecting arms and a spring belt group. Each connecting arm includes two connecting rods and two friction rods. The structure is simple, which is convenient for assembly and disassembly. Using simple existing steel structures and elastic rubber systems, it has quite good versatility. At the same time, a reasonable structure made of steel and an elastic rubber system can effectively control the vertical vibration of the structure or equipment and reduce shock and isolate vibration.

[0024] (2) Instead of using an air spring, a rubber spring is used, which avoids the weakening or even failure of the shock absorption effect caused by air leakage. The rubber spring has good energy dissipation characteristics, and using it as a shock absorption system can play a very good role in reducing shock and isolating vibration.

[0025] (3)The spring band is arranged on the friction rod of the connecting arm, which is convenient for disassembly and assembly. In view of the characteristics of various structures or equipment with large differences in size and mass, rubber systems with different sizes and elastic coefficients can be designed according to requirements to isolate vibration and protect them. It can be quickly replaced for different application scenarios and can be applied to a variety of scenarios. Brief Description of the Drawings

[0026] Figure 1 It is a three-dimensional view of the present invention including a spring band;

[0027] Figure 2 It is a three-dimensional view of the present invention without a spring band and a compression sleeve;

[0028] Figure 3 It is a schematic structural view of the present invention;

[0029] Figure 4 It is a three-dimensional view of each component of the present invention;

[0030] Figure 5 It is a three-dimensional view of the combined hinge joint;

[0031] Figure 6 It is a three-dimensional view of the separated hinge joint;

[0032] Figure 7 It is a front view of the hinge joint;

[0033] Figure 8 It is a front view of the support sleeve;

[0034] Figure 9 It is a front view after the connecting rod and the friction rod are combined,

[0035] Among them, 1. The first support plate, 2. The second support plate, 3. The support sleeve, 4. The compression sleeve, 5. The central rod, 6. The first connecting arm, 7. The second connecting arm, 8. The spring band, 9. The hinge joint, 10. The bushing. Detailed Embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1

[0038] As Figures 1-4It is a schematic diagram of a vertical seismic isolation device, including: a first support plate 1 and a second support plate 2 arranged in parallel; a first seismic isolation module and a second seismic isolation module arranged between the first support plate 1 and the second support plate 2. The first seismic isolation module includes: a support sleeve 3 connected to the second support plate 2; a compression sleeve 4 connected to the first support plate 1 and abutting against the support sleeve 3; a central rod 5 connected to the support sleeve 3 and the compression sleeve 4 in a matching manner, and the central rod 5 is connected to the first support plate 1. The second seismic isolation module includes: a first connecting arm 6 and a second connecting arm 7 respectively and movably connected to the first support plate 1 and the second support plate 2; a spring belt group 8 respectively connected to the first connecting arm 6 and the second connecting arm 7. The first connecting arm 6 and the second connecting arm 7 have the same structure, including a first connecting rod, a second connecting rod, a first friction rod and a second friction rod. Among them, the first connecting rod is respectively and movably connected to the first support plate 1 and the second connecting rod, the second connecting rod is movably connected to the second support plate 2, the first friction rod is arranged on one side of the first connecting rod close to the second support plate 2, the second friction rod is arranged on one side of the second connecting rod close to the first support plate 1, and the spring belt group 8 is connected to the friction rods on the first connecting arm 6 and the second connecting arm 7.

[0039] The spring belt group 8 realizes the connection between the following components: the first friction rod of the first connecting arm 6 and the first friction rod of the second connecting arm 7; the second friction rod of the first connecting arm 6 and the second friction rod of the second connecting arm 7.

[0040] The first connecting rod and the second connecting rod are connected by a hinge joint 9, the first connecting rod and the first support plate 1 are connected by a hinge joint 9, and the second connecting rod and the second support plate 2 are connected by a hinge joint 9.

[0041] The hinge joint 9 between the first support plate 1 and the connecting arm is integrally formed or welded, and the hinge joint 9 between the second support plate 2 and the connecting arm is integrally formed or welded. The materials of the first support plate 1, the second support plate 2, the central rod 5, the first connecting arm 6, the second connecting arm 7 and the hinge joint 9 are high-strength steel materials. The materials of the compression sleeve 4, the bushing 10 and the spring belt group 8 are rubber materials with high strength and good elastic deformation ability.

[0042] As Figures 5-7 It is a schematic diagram of the structure of the hinge joint 9. The hinge joint 9 includes a bolt and a plurality of connecting pieces. One end of a single connecting piece has an opening matching the bolt, and the other end is welded or integrally formed with the connecting object, and the connecting piece is connected to the bolt in a matching manner.

[0043] As Figure 8 It is a schematic diagram of the structure of the support sleeve 3. The support sleeve 3 is connected to the central rod 5 in a matching manner.

[0044] As Figure 9It is a schematic structural diagram after the connection rod and the friction rod are combined. The friction rod is arranged on one side of the connection rod, and a circular plate is arranged at each end of the friction rod to limit the movement of the spring belt group 8.

[0045] In practical applications, according to the structure and equipment quality of the structure to be used, the compression sleeve 4 and the spring belt group 8 are selected according to their elastic coefficients. The present invention is arranged between a stable ground and a protected object, and a suitable support sleeve 3 is selected to adjust the height of the device so as to be in full contact with the stable surface and the protected object. For vertical vibrations, such as the vertical component of seismic action and the vertical high-frequency vibrations during industrial equipment operation, the elastic potential energy of the compression sleeve 4, the friction between the compression sleeve 4 and the central rod 5, and the tensile force generated by the stretching of the spring belt group 8 can all dissipate energy to buffer and dampen vibrations. For lateral forces, the friction between the sleeve structure and the central rod 5 and the tensile force generated by the stretching of the rubber spring belt 8 can both dissipate energy to limit the lateral displacement of the structural frame.

[0046] Embodiment 2

[0047] Compared with Embodiment 1, the difference in this embodiment is that the first isolation module further includes a bushing 10 that is respectively connected to the central shaft 5 and the support sleeve 3 in a matching manner, and is located on the side of the support sleeve 3 close to the first support plate 1. The bushing 10 can protect the central rod 5, reduce the loss caused by friction with the support sleeve 3, and extend the expected service life of the isolation system.

[0048] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A vertical seismic isolation device, characterized in that, it comprises: a first support plate (1) and a second support plate (2) arranged in parallel; a first seismic isolation module and a second seismic isolation module arranged between the first support plate (1) and the second support plate (2), the first seismic isolation module comprising: a support sleeve (3) connected to the second support plate (2); a compression sleeve (4) connected to the first support plate (1) and abutting against the support sleeve (3); a central rod (5) respectively connected to the support sleeve (3) and the compression sleeve (4) in a mating connection, and the central rod (5) is connected to the first support plate (1), the second seismic isolation module comprising: a first connecting arm (6) and a second connecting arm (7) respectively and movably connected to the first support plate (1) and the second support plate (2); a spring belt group (8) respectively connected to the first connecting arm (6) and the second connecting arm (7), the first connecting arm (6) and the second connecting arm (7) having the same structure, including a first connecting rod, a second connecting rod, a first friction rod and a second friction rod. Among them, the first connecting rod is respectively and movably connected to the first support plate (1) and the second connecting rod, the second connecting rod is movably connected to the second support plate (2), the first friction rod is arranged on one side of the first connecting rod close to the second support plate (2), the second friction rod is arranged on one side of the second connecting rod close to the first support plate (1), and the spring belt group (8) is connected to the friction rods on the first connecting arm (6) and the second connecting arm (7); the first seismic isolation module further comprises a bushing (10) respectively connected to the central rod (5) and the support sleeve (3) in a mating connection, and is located on one side of the support sleeve (3) close to the first support plate (1).

2. The vertical seismic isolation device according to claim 1, characterized in that, the spring belt group (8) realizes the connection between the following components: the first friction rod of the first connecting arm (6) and the first friction rod of the second connecting arm (7); the second friction rod of the first connecting arm (6) and the second friction rod of the second connecting arm (7).

3. The vertical seismic isolation device according to claim 1, characterized in that, the first connecting rod and the second connecting rod are connected by a hinge joint (9), the first connecting rod and the first support plate (1) are connected by a hinge joint (9), and the second connecting rod and the second support plate (2) are connected by a hinge joint (9).

4. The vertical seismic isolation device according to claim 3, characterized in that, the hinge joint (9) comprises a bolt and a plurality of connecting pieces. One end of a single connecting piece has an opening matching the bolt, and the other end is welded or integrally formed with the connection object, and the connecting piece is connected to the bolt in a mating connection.

5. The vertical seismic isolation device according to claim 1, characterized in that, the central rod (5), the support sleeve (3), the compression sleeve (4) and the bushing (10) are coaxially placed.

6. The vertical seismic isolation device according to claim 3, characterized in that, The materials of the described first support plate (1), second support plate (2), central rod (5), first connecting arm (6), second connecting arm (7) and hinge joint (9) are steel.

7. A vertical seismic isolation device according to claim 3, wherein, the hinge joint (9) between the first support plate (1) and the connecting arm is integrally formed or welded, and the hinge joint (9) between the second support plate (2) and the connecting arm is integrally formed or welded.

8. A vertical seismic isolation device according to claim 1, wherein, the materials of the described compression sleeve (4), bushing (10) and spring band group (8) are rubber.

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