Self-resetting liquid inerter shock insulation support

Abstract

The invention provides a self-resetting liquid inerter shock insulation support. The self-resetting liquid inerter shock insulation support comprises a top plate, a middle plate, a bottom plate, a supporting ring, a flexible shock insulation body, an inerter, a resetting rod and an elastic resetting piece, the reset rod penetrates through the inerter and the middle plate, the upper end of the reset rod is connected with the top plate through an elastic reset piece, the bottom plate is provided with an arc-shaped groove, and the lower end of the reset rod is in contact fit with the arc-shaped groove; the inerter comprises a cylinder body, a spiral pipe and a piston, a sealing cavity is formed in the cylinder body, the sealing cavity is filled with working fluid, the piston divides the sealing cavity into an upper cavity and a lower cavity, the reset rod penetrates through the piston and is connected with the piston, an upper port of the spiral pipe sleeve is communicated with the upper cavity, and a lower port of the spiral pipe sleeve is communicated with the lower cavity. The inerter is implanted into the flexible shock insulation body, high static degree and low dynamic rigidity can be achieved, the shock absorption frequency band is effectively expanded, the shock insulation effect is improved, the liquid inerter can increase certain inertia mass and damping energy consumption effects for the shock insulation support, and the liquid inerter shock insulation support is simple in structure, high in durability and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of seismic isolation structures, and in particular to a self-resetting liquid inertia isolation support. Background Art

[0002] Structural vibration control technology can effectively suppress the dynamic response of the structure under external excitations such as wind and earthquake, reduce the damage to the structure caused by these external factors, and ensure the normal operation of the structure. As a basic seismic isolation technology equipment, seismic isolation bearings can isolate the building from the foundation to prevent the seismic load from being directly transmitted to the foundation through the building structure. At the same time, seismic isolation bearings allow the building structure to produce relative displacement during an earthquake, thereby reducing the impact of seismic loads and reducing the risk of earthquake damage.

[0003] Traditional seismic isolation bearings mainly include rubber bearings and friction bearings, among which rubber seismic isolation bearings are the most common. Rubber seismic isolation bearings are made of rubber as the main material, and achieve seismic isolation, shock absorption and energy dissipation through the elastic deformation of rubber and the combined action of other additional elements (such as steel plates, damping elements, etc.). However, rubber seismic isolation bearings also have certain limitations. Their shock absorption frequency band and control effect are related to the stiffness of the seismic isolation bearings. That is, the smaller the stiffness, the wider the shock absorption frequency band and the better the seismic isolation effect, but it will also lead to increased deformation of the seismic isolation layer. Excessive deformation may cause the building structure to overturn due to eccentric force. Summary of the invention

[0004] The present invention provides a self-resetting liquid inertia isolation bearing, which can achieve "high staticity and low dynamic stiffness", effectively expand the shock absorption frequency band of the isolation bearing, and improve the isolation effect, so as to solve the contradiction between the shock absorption effect and the bearing stiffness of the existing isolation bearing, that is, although too small stiffness can improve the shock absorption effect, it will cause excessive deformation of the isolation layer and increase the risk of building overturning.

[0005] The invention provides a self-resetting liquid inertia capacity seismic isolation support, comprising: a top plate, a middle plate, a bottom plate, a support ring, a flexible seismic isolation body, an inertia container, a reset rod and an elastic reset member.

[0006] The top plate, the middle plate and the bottom plate are parallel to each other and spaced apart, the upper end of the support ring is connected to the top plate, the lower end of the support ring is connected to the middle plate, the inertial container is located in the support ring, the reset rod is passed through the inertial container and the middle plate, the upper end of the reset rod is connected to the top plate through the elastic reset member, the top wall of the bottom plate is provided with an arc-shaped groove, the lower end of the reset rod is in contact with and cooperates with the arc-shaped groove, in an initial state, the lower end of the reset rod is located at the center of the arc-shaped groove, and the elastic reset member is in a pre-compression state.

[0007] The inertial container includes a cylinder body, a spiral tube and a piston. A sealed cavity is formed in the cylinder body, and the sealed cavity is filled with a working fluid. The piston is located in the sealed cavity and divides the sealed cavity into an upper cavity and a lower cavity. The piston and the sealed cavity are slidably matched in a vertical direction. The reset rod is passed through the piston and connected to the piston. The spiral tube is sleeved on the outer wall of the cylinder body, and the upper port of the spiral tube is communicated with the upper cavity, and the lower port of the spiral tube is communicated with the lower cavity.

[0008] The self-resetting liquid inertia isolation bearing provided in the present invention also includes a guide rod and a limit seat, one end of the guide rod is connected to the reset rod, the limit seat is arranged on the bottom wall of the top plate, the guide rod and the limit seat are matched along the vertical sliding, in the initial state, there is a distance between the upper end of the guide rod and the bottom wall of the top plate, and the elastic reset piece is sleeved on the limit seat.

[0009] According to the self-resetting liquid inertia isolation bearing provided by the present invention, the elastic reset member is a reset spring, and the reset spring is sleeved on the guide rod.

[0010] According to the self-resetting liquid inertia isolation bearing provided by the present invention, an inner cavity is formed in the flexible isolation body, and the inner cavity is used to limit the reset rod.

[0011] According to the self-resetting liquid inertia isolation bearing provided by the present invention, the diameter of the inner cavity is the same as the diameter of the arc-shaped groove.

[0012] According to the self-resetting liquid inertia isolation bearing provided by the present invention, a ball head is provided at the lower end of the reset rod, and the ball head is in contact and fit with the arc-shaped groove.

[0013] According to the self-resetting liquid inertia isolation bearing provided by the present invention, the surface of the arc-shaped groove is provided with a wear-resistant coating.

[0014] According to the self-resetting liquid inertia isolation bearing provided by the present invention, the wear-resistant coating is a chromium layer, a nickel layer, a zinc layer, an aluminum oxide layer, a silicon nitride layer or a silicon carbide layer.

[0015] According to the self-resetting liquid inertia isolation bearing provided by the present invention, the flexible isolation body includes a plurality of flexible layers and a plurality of rigid layers, and the flexible layers and the rigid layers are alternately stacked.

[0016] According to the self-resetting liquid inertia isolation bearing provided by the present invention, the flexible layer is a rubber layer, and the rigid layer is a steel plate layer.

[0017] The self-resetting liquid inertia isolation bearing provided by the present invention can achieve "high staticity and low dynamic stiffness" by implanting the liquid inertia container into the flexible isolation body, effectively expand the shock absorption frequency band, and improve the isolation effect. Compared with the mechanical inertia container, the liquid inertia container can increase the inertia and damping energy dissipation effect for the isolation bearing, and has a simple structure, strong durability and low cost.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of a self-resetting liquid inertia isolation bearing provided in an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Schematic diagram of the AA section.

[0022] Figure 3 yes Figure 2 A partial enlarged schematic diagram of B in the figure.

[0023] Figure 4 It is a schematic diagram of the inertia container in the self-resetting liquid inertia container seismic isolation bearing provided in an embodiment of the present invention.

[0024] Reference numerals: 10. Top plate; 110. Limit seat; 20. Middle plate; 30. Bottom plate; 310. Arc groove; 40. Support ring; 50. Flexible seismic isolation body; 510. Flexible layer; 520. Rigid layer; 530. Inner cavity; 60. Inertial container; 610. Cylinder body; 620. Spiral tube; 630. Piston; 640. Sealed cavity; 70. Reset rod; 710. Ball head; 80. Elastic reset member; 90. Guide rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] Combine the following Figures 1 to 4 The invention describes a self-resetting liquid inertia isolation bearing.

[0031] See also Figures 1 to 4 As shown, the self-resetting liquid inertia container seismic isolation bearing provided in the embodiment of the present invention includes: a top plate 10, a middle plate 20, a bottom plate 30, a support ring 40, a flexible seismic isolation body 50, an inertia container 60, a reset rod 70 and an elastic reset member 80.

[0032] The top plate 10, the middle plate 20 and the bottom plate 30 are parallel to each other and spaced apart. The upper end of the support ring 40 is connected to the top plate 10, and the lower end of the support ring 40 is connected to the middle plate 20. The inertial container 60 is located in the support ring 40. The reset rod 70 passes through the inertial container 60 and the middle plate 20. The upper end of the reset rod 70 is connected to the top plate 10 through an elastic reset member 80. An arc groove 310 is provided on the inner wall of the bottom plate 30. The lower end of the reset rod 70 contacts and cooperates with the arc groove 310. In the initial state, the lower end of the reset rod 70 is located at the center of the arc groove 310, and the elastic reset member 80 is in a pre-compression state.

[0033] The inertia container 60 includes a cylinder body 610, a spiral tube 620 and a piston 630. A sealed cavity 640 is formed in the cylinder body 610. The sealed cavity 640 is filled with a working fluid. The piston 630 is located in the sealed cavity 640 and divides the sealed cavity 640 into an upper cavity and a lower cavity. The piston 630 and the sealed cavity 640 are slidably matched along the vertical direction. The reset rod 70 is penetrated by the piston 630 and connected to the piston 630. The spiral tube 620 is sleeved on the outer wall of the cylinder body 610. The upper end of the spiral tube 620 is communicated with the upper cavity, and the lower end of the spiral tube 620 is communicated with the lower cavity.

[0034] The self-resetting liquid inertia isolation bearing provided by the present invention can achieve "high staticity and low dynamic stiffness" by implanting the liquid inertia container 60 into the flexible isolation body 50, effectively expanding the shock absorption frequency band and improving the isolation effect. Compared with the mechanical inertia container 60, the liquid inertia container 60 can add a certain inertia and damping energy dissipation effect to the isolation bearing, and has a simple structure, strong durability and low cost. The working fluid can be liquids such as silicone oil, polymer solution or hydraulic oil. Among them, silicone oil has stable chemical properties, high temperature resistance (-50°C to 200°C), small viscosity change with temperature, stable performance, flame retardancy, aging resistance, and long service life; polymer solution can adjust the damping characteristics by adjusting the polymer type and concentration, and is suitable for special needs; hydraulic oil has a high viscosity coefficient and can provide a large damping force.

[0035] Specifically, the seismic isolation bearing should be usable in the construction industry, and when used, it should be placed between the foundation and the main body of the building. When the seismic isolation bearing is subjected to shear force under the action of horizontal earthquake, the middle plate 20 and the bottom plate 30 undergo horizontal relative displacement, thereby driving the flexible seismic isolation body 50 to undergo horizontal deformation and displacement, and the lower end of the reset rod 70 moves outward from the initial position (the center of the arc-shaped groove 310). During this process, the reset rod 70 is restricted from moving upward by the connection hole of the middle plate 20, and its upper end compresses the elastic reset member 80. The reaction force generated when the elastic reset member 80 is deformed can provide a vertical restoring force for the reset rod 70, thereby driving the reset rod 70 to quickly reset itself and increase the friction between the bottom end of the reset rod 70 and the arc-shaped groove 310 to hinder the horizontal relative displacement of the seismic isolation bearing; at the same time, the reset rod 70 can also drive the piston 630 in the sealing cavity 640 to move upward. In the sealing cavity 640, the working fluid circulates between the upper cavity, the spiral tube 620 and the lower cavity under the driving action of the piston 630, and the reset rod 70 is subjected to a damping force in the opposite direction of movement. After the horizontal earthquake action ends, the flexible seismic isolation body 50 and the elastic reset member 80 can restore the seismic isolation support to the initial state through their own elastic restoring force.

[0036] The top plate 10, the middle plate 20 and the bottom plate 30 are parallel to each other and arranged at intervals along the vertical direction. The upper end of the support ring 40 is connected to the bottom wall of the top plate 10 (such as by welding or by using threaded connectors to assist connection), and the lower end of the support ring 40 is connected to the top wall of the middle plate 20 (such as by welding or by using threaded connectors to assist connection). The inertial container 60 is located inside the support ring 40, and is protected by the spiral tube 620 wound around the outer wall of the cylinder body 610 of the support ring 40 to prevent the spiral tube 620 from being damaged during the construction and installation of the seismic isolation bearing, thereby effectively ensuring the shock absorption effect of the seismic isolation bearing. The flexible seismic isolation body 50 is arranged between the middle plate 20 and the bottom plate 30, so that the seismic isolation bearing forms a stable frame structure. The top plate 10, the middle plate 20, the bottom plate 30 and the support ring 40 can all be made of high-strength materials (such as steel).

[0037] The reset rod 70 is disposed through the cylinder 610, the piston 630 and the middle plate 20 of the inertial container 60. In specific implementation, a through hole matching the outer diameter of the reset rod 70 can be provided at the center of the cylinder 610, the piston 630 and the middle plate 20 of the inertial container 60, and a sealing ring can be provided at the position where a sealing connection is required. Similarly, the reset rod 70 can also be made of a material with a relatively high strength (such as steel). The elastic reset member 80 can be a device having an elastic reset function such as a reset spring and a reset pad.

[0038] See also Figure 4 As shown, the inertia container 60 is a liquid inertia container 60, which includes a cylinder 610, a spiral tube 620 and a piston 630, wherein a sealed cavity 640 is formed in the cylinder 610, and a channel for the circulation of working fluid is formed in the spiral tube 620. The principle is that when the piston 630 moves in the sealed cavity 640, it can drive the working fluid in the upper cavity and the lower cavity through the peripheral spiral tube 620 to realize the hydraulic mechanism. Since the inner diameter of the spiral tube 620 is much smaller than the inner diameter of the cylinder 610, the fluid speed in the spiral tube 620 is amplified compared with the speed of the piston 630. By expanding the area of ​​the piston 630 or reducing the pipe cross-sectional area of ​​the spiral tube 620, the inertia value of the liquid inertia container 60 can be amplified, which is equivalent to increasing the additional mass in the structure, generating a mass amplification effect to achieve the purpose of structural shock absorption. By setting the spiral tube 620, on the one hand, the distance of liquid movement is greatly increased, thereby increasing the time of damping force action and the friction between the liquid and the spiral tube 620, thereby improving the damping and energy dissipation effects.

[0039] On the other hand, when the liquid in the liquid inertia container 60 flows, the liquid inertia container 60 will generate The negative stiffness of is the excitation frequency, is the inertial value, and the expression is as follows.

[0040] ; Where: is the cross-sectional area of ​​the cylinder 610, is the cross-sectional area of ​​the spiral tube 620, is the liquid density, The length of the spiral tube is 620.

[0041] Since the cross-sectional area of ​​the piston 630 is much larger than the cross-sectional area of ​​the spiral tube 620 and the spiral tube 620 has a certain length, the inertia value of the liquid inertia container 60 is relatively large, and the "negative stiffness" effect is significant. The negative stiffness is related to the excitation frequency, that is, negative stiffness will only occur when the motion is at a certain frequency.

[0042] When the seismic isolation bearing is subjected to shear force under the action of horizontal earthquake, the horizontal relative displacement of the middle plate 20 and the bottom plate 30 can cause the flexible seismic isolation body 50 to deform and displace horizontally. The reset rod 70 moves upward under the action of the arc groove 310, and simultaneously drives the piston 630 to move up and down to drive the liquid flow, thereby achieving the purpose of implanting the seismic isolation bearing into the liquid inertia container 60. It can achieve "high staticity and low dynamic stiffness", that is, the horizontal stiffness is larger during low-frequency movement, and the horizontal stiffness is smaller during high-frequency movement. Different from the positive stiffness of the traditional rubber seismic isolation layer, the horizontal stiffness of the device is dynamically adjusted with the change of the excitation frequency, which can effectively expand the shock absorption bandwidth and improve the seismic isolation effect.

[0043] After the horizontal earthquake action ends, the flexible seismic isolation body 50 and the elastic reset member 80 restore the seismic isolation support to the initial state through their own elastic restoring force, thereby realizing the self-reset function.

[0044] See also Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the self-resetting liquid inertia isolation bearing also includes a guide rod 90 and a limit seat 110, one end of the guide rod 90 is connected to the reset rod 70, the limit seat 110 is arranged on the bottom wall of the top plate 10, the guide rod 90 and the limit seat 110 are matched along the vertical sliding direction, in the initial state, there is a gap between the upper end of the guide rod 90 and the bottom wall of the top plate 10, and the elastic reset member 80 is sleeved on the limit seat 110.

[0045] By providing the guide rod 90 and the limit seat 110, when the bottom of the reset rod 70 moves outward from the center of the arc-shaped groove 310, it can drive the guide rod 90 to move upward. Since the guide rod 90 and the limit seat 110 are matched along the vertical sliding, and in the initial state, there is a distance between the upper end of the guide rod 90 and the bottom wall of the top plate 10, the elastic reset member 80 can apply a force in the opposite direction to the reset rod 70, and at the same time, it can also ensure that the elastic force applied by the elastic reset member 80 to the reset rod 70 is always maintained in the axial direction, preventing the elastic force of the elastic reset member 80 from deviating from the axial direction.

[0046] Specifically, the limit seat 110 is provided with an inner hole adapted to the guide rod 90, and the depth of the inner hole is greater than the length of the guide rod 90, so that in the initial state, a distance is provided between the upper end of the guide rod 90 and the bottom wall of the top plate 10, so that the reset rod 70 and the guide rod 90 can move vertically, and the elastic reset member 80 is sleeved on the outer wall of the limit seat 110 to limit and fix it and prevent the elastic force of the elastic reset member 80 from deviating from the axial direction.

[0047] See also Figure 2 As shown, according to some embodiments of the present invention, the elastic return member 80 is a return spring, and the return spring is sleeved on the guide rod 90.

[0048] By selecting a return spring as the elastic return member 80, a stable elastic restoring force can be provided, so that the structure can quickly return to its original position after being externally stimulated; secondly, the return spring has good adjustability, and the magnitude of the return force can be accurately controlled by adjusting the stiffness of the spring; in addition, the return spring has a simple structure, low cost, and good durability, and can maintain stable working performance for a long time.

[0049] Preferably, the return spring may be a steel spring with a larger elastic modulus to further improve the stiffness and restoring force of the spring. The steel spring has a higher elastic modulus, which enables it to have a stronger restoring ability under a larger deformation, thereby ensuring that the structure can quickly and effectively return to its original position after being subjected to external excitation.

[0050] See also Figure 2 As shown, according to some embodiments of the present invention, an inner cavity 530 is formed in the flexible seismic isolation body 50 , and the inner cavity 530 is used to limit the reset rod 70 .

[0051] By providing an inner cavity 530 in the flexible seismic isolation body 50, the reset rod 70 can be effectively limited to prevent excessive displacement or offset under the action of an earthquake, and additional control can be provided so that the reset rod 70 can maintain good recovery performance and safety under the action of an earthquake.

[0052] See also Figure 2 As shown, according to some embodiments of the present invention, the diameter of the inner cavity 530 is the same as the diameter of the arc-shaped groove 310 .

[0053] By setting the diameter of the inner cavity 530 to be the same as the diameter of the arc-shaped groove 310 , the bottom of the reset rod 70 can be restricted within the arc-shaped groove 310 to prevent it from slipping out of the arc-shaped groove 310 and causing failure to reset.

[0054] See also Figure 2 As shown, according to some embodiments of the present invention, a ball head 710 is provided at the lower end of the reset rod 70 , and the ball head 710 contacts and cooperates with the arc-shaped groove 310 .

[0055] By arranging a ball head 710 at the lower end of the reset rod 70, when the seismic isolation bearing is subjected to shear force under the action of a horizontal earthquake, the lower end of the reset rod 70 can easily move outward along the center of the arc-shaped groove 310 to offset the horizontal shear force generated by the earthquake. After the earthquake disappears, the ball head 710 structure can more easily return to the center position of the arc-shaped groove 310, thereby facilitating the overall reset of the seismic isolation bearing.

[0056] Specifically, the ball head 710 may be connected to the lower end of the reset rod 70 by welding, or the reset rod 70 and the ball head 710 may be integrally provided.

[0057] According to some embodiments of the present invention, a wear-resistant coating is provided on the surface of the arc-shaped groove 310 .

[0058] By providing a wear-resistant coating on the surface of the arc groove 310, the friction performance and durability between the bottom of the reset rod 70 and the arc groove 310 can be significantly improved. The wear-resistant coating can reduce the wear of the arc groove 310 during the sliding process, thereby extending its service life.

[0059] Specifically, the wear-resistant coating can be processed on the surface of the arc groove 310 by electroplating, spraying, thermal spraying, chemical deposition, etc.

[0060] As an example, the wear-resistant coating can be a chromium layer, a nickel layer, a zinc layer, an aluminum oxide layer, a silicon nitride layer or a silicon carbide layer. The above-mentioned wear-resistant coating has good wear resistance and service life, and can effectively improve the wear resistance of the surface. For example, the chromium layer and the nickel layer provide high hardness and excellent corrosion resistance, and are suitable for general friction environments; the zinc layer is mainly used for corrosion protection, especially in a wet environment; the aluminum oxide layer has extremely high hardness and is suitable for occasions requiring high wear resistance and heat resistance; the silicon nitride layer and the silicon carbide layer are often used in environments with extreme friction and high pressure due to their excellent high temperature resistance and wear resistance.

[0061] In specific implementation, choosing a suitable coating according to different working conditions can significantly extend the service life of the equipment and improve its performance.

[0062] See also Figure 2 As shown, according to some embodiments of the present invention, the flexible seismic isolation body 50 includes a plurality of flexible layers 510 and a plurality of rigid layers 520 , and the flexible layers 510 and the rigid layers 520 are alternately stacked.

[0063] By configuring the flexible seismic isolation body 50 to include a plurality of flexible layers 510 and rigid layers 520 alternately stacked, when the seismic isolation bearing is subjected to shear force under the action of a horizontal earthquake, the stacked flexible layers 510 and rigid layers 520 can undergo horizontal deformation and displacement, and while absorbing the shear force, horizontal relative displacement can occur between the middle plate 20 and the bottom plate 30, so that the ball head 710 can move outward from the center position of the arc-shaped groove 310, and the piston 630 is driven to move upward through the reset rod 70, thereby utilizing the inertia container 60 to apply a damping force in the opposite direction to the reset rod 70.

[0064] Preferably, the flexible layer 510 can be a rubber layer, which can effectively absorb seismic forces due to its excellent elasticity and buffering properties; and the rigid layer 520 can be a steel plate layer, whose hardness and strength can provide the required support and stability, and enhance the durability and seismic resistance of the overall structure.

[0065] Specifically, the rubber layers and steel plate layers alternately stacked may be bonded by high-temperature vulcanization, and the upper and lower ends of the flexible seismic isolation body 50 may be respectively connected to the middle plate 20 and the bottom plate 30 by bonding.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-resetting liquid inertia isolation bearing, characterized in that: include: Top plate, middle plate, bottom plate, support ring, flexible seismic isolator, inertial container, reset rod and elastic reset member; The top plate, the middle plate and the bottom plate are parallel to each other and spaced apart. The upper end of the support ring is connected to the top plate, and the lower end of the support ring is connected to the middle plate. The inertial container is located in the support ring. The reset rod is passed through the inertial container and the middle plate. The upper end of the reset rod is connected to the top plate through the elastic reset member. The top wall of the bottom plate is provided with an arc groove. The lower end of the reset rod is in contact with and cooperates with the arc groove. In the initial state, the lower end of the reset rod is located at the center of the arc groove, and the elastic reset member is in a pre-compression state. The inertial container includes a cylinder body, a spiral tube and a piston. A sealed cavity is formed in the cylinder body, and the sealed cavity is filled with a working fluid. The piston is located in the sealed cavity and divides the sealed cavity into an upper cavity and a lower cavity. The piston and the sealed cavity are slidably matched in a vertical direction. The reset rod is passed through the piston and connected to the piston. The spiral tube is sleeved on the outer wall of the cylinder body, and the upper port of the spiral tube is communicated with the upper cavity, and the lower port of the spiral tube is communicated with the lower cavity.

2. The self-resetting liquid inertia isolation bearing according to claim 1 is characterized in that: It also includes a guide rod and a limit seat, one end of the guide rod is connected to the reset rod, the limit seat is arranged on the bottom wall of the top plate, the guide rod and the limit seat are matched along the vertical sliding, in the initial state, there is a distance between the upper end of the guide rod and the bottom wall of the top plate, and the elastic reset piece is sleeved on the limit seat.

3. The self-resetting liquid inertia isolation bearing according to claim 2 is characterized in that: The elastic return member is a return spring, and the return spring is sleeved on the guide rod.

4. The self-resetting liquid inertia isolation bearing according to claim 1 is characterized in that: An inner cavity is formed in the flexible seismic isolation body, and the inner cavity is used to limit the reset rod.

5. The self-resetting liquid inertia isolation bearing according to claim 4 is characterized in that: The diameter of the inner cavity is the same as the diameter of the arc-shaped groove.

6. The self-resetting liquid inertia isolation bearing according to claim 1 is characterized in that: A ball head is provided at the lower end of the reset rod, and the ball head is in contact and fit with the arc-shaped groove.

7. The self-resetting liquid inertia isolation bearing according to claim 1 is characterized in that: The surface of the arc-shaped groove is provided with a wear-resistant coating.

8. The self-resetting liquid inertia isolation bearing according to claim 7 is characterized in that: The wear-resistant coating is a chromium layer, a nickel layer, a zinc layer, an aluminum oxide layer, a silicon nitride layer or a silicon carbide layer.

9. The self-resetting liquid inertia isolation bearing according to claim 1 is characterized in that: The flexible seismic isolation body comprises a plurality of flexible layers and a plurality of rigid layers, and the flexible layers and the rigid layers are alternately stacked.

10. The self-resetting liquid inertia isolation bearing according to claim 9, characterized in that: The flexible layer is a rubber layer, and the rigid layer is a steel plate layer.

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