Self-resetting type semi-underground liquid storage tank with multiple damping units and damping method of self-resetting type semi-underground liquid storage tank

Abstract

The invention relates to a self-resetting type semi-underground liquid storage tank with a multi-element damping unit and a damping method of the self-resetting type semi-underground liquid storage tank. A two-section type self-resetting side wall unit is arranged outside the liquid storage tank, the liquid storage tank is connected with a surrounding soil body through an eddy current damping-inerter unit, and a lead screw stroke cavity is connected with the two-section type self-resetting side wall unit through a sliding block; the sliding block is connected in the sliding rail in a sliding mode, the two ends of the ball screw extend into screw stroke cavities connected with the sliding block and the hinged support respectively, a rotating mass disc is arranged on the ball screw, a ball nut is arranged on the ball screw in a sleeved mode, and the rotating mass disc is connected with the rotating mass disc. The ball nuts are embedded into the lead screw stroke cavities connected with the sliding block and the hinged support respectively, and the permanent magnets are arranged on the lead screw stroke cavities connected with the sliding block and the hinged support respectively and arranged on the ball nuts in a sleeving mode. Compared with the prior art, the stress concentration effect in the semi-underground liquid storage tank is eliminated, meanwhile, the liquid and structure composite response of the liquid storage tank is reduced, and the shock resistance and toughness of the semi-underground liquid storage tank are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of energy dissipation and shock absorption of civil engineering structures, and relates to a self-resetting semi-underground liquid storage tank with a multi-element shock absorption unit and a shock absorption method thereof. Background Art

[0002] The demand for low-carbon, environmentally friendly clean energy is growing. Natural gas is recognized as the cleanest fossil energy on earth, but it is difficult to store and transport. Ultra-low temperature liquefaction of natural gas can form liquefied natural gas (LNG), which can be easily transported and stored for a long time. With the rapid development of membrane tank technology, liquid storage tanks as a storage medium for LNG are gradually becoming larger; currently, the maximum capacity of a single storage tank in my country has reached 270,000 cubic meters. As an important lifeline project and energy infrastructure, the disaster prevention and safety performance of liquid storage tank structures under dynamic load disasters has received widespread attention.

[0003] Compared with the above-ground liquid storage tank structure, the underground or semi-underground liquid storage tank structure has more advantages. On the one hand, the liquid storage tank structure is mostly set up in coastal areas, and the underground or semi-underground structure is more convenient for the loading and unloading of LNG ships; and compared with the above-ground structure, it has a natural advantage in resisting typhoons and tsunamis; on the other hand, once an LNG leak occurs, the impact radius of the underground or semi-underground liquid storage tank structure is smaller. Considering the high cost, long construction period and high construction difficulty of the underground liquid storage tank structure, the semi-underground liquid storage tank structure has a wider range of engineering applications.

[0004] The structure of liquid storage tanks in earthquake-prone areas may be subject to strong earthquakes. Under rare earthquakes, the structure of liquid storage tanks may produce significant residual deformation, which seriously affects its use function and structural safety, and thus causes serious economic losses and social impacts. Energy dissipation and vibration reduction technology uses additional energy dissipation and additional stiffness to ensure the complex requirements of seismic (vibration) safety, human comfort and normal use function of the controlled structure by adding energy dissipation and vibration reduction devices to the controlled structure to jointly bear the effects of earthquakes and wind vibrations. The side walls of traditional semi-underground liquid storage tanks and the surrounding soil together constitute a complex interaction system of fluid-tank-soil. Stress concentration is prone to occur at the junction of the system interaction under earthquake action. The sudden change of the lateral boundary conditions of the tank caused by the semi-buried soil will amplify the multiple response peaks such as shear force, bending moment, concentrated stress and liquid wave height of the liquid storage tank, which will seriously threaten the seismic safety and normal use function of the liquid storage tank structure. Therefore, it is urgent to develop a semi-underground liquid storage tank structure system that can eliminate stress concentration effects and realize efficient absorption and disposal of earthquake energy.

[0005] Patent CN109267675A discloses a shear wall system with hysteresis inertia, including a shear wall structure, a hysteresis inertia structure, and a mounting base. The hysteresis inertia structure includes several groups of hysteresis energy dissipation support units and several groups of viscous self-resetting inertia units; wherein the viscous self-resetting inertia unit includes a connecting earring, a ball screw, an inertia outer cylinder, a rotating inner cylinder, a rotating nut, a high-strength steel cable group, several rotating mass blocks, a viscous damping liquid, an inner cylinder rotating shaft, and a connecting rod. However, in this patent, the viscous self-resetting inertia unit and the hysteresis shear plate are connected in parallel in the vertical space. The installation method thereof is used to constrain the self-resetting deformation of the shear wall system, and cannot solve the problem of releasing the deformation of the self-resetting tank body of the self-resetting liquid storage tank structure and relieving the stress concentration effect caused by the interaction between the semi-buried soil body and the tank body; at the same time, the aforementioned installation position makes a distance between the shear wall and the mounting base. Similar technology applied to a membrane type liquid storage tank will not provide sufficient vertical support and self-resetting ability for the inner tank containing liquid, thereby affecting the normal use function.

[0006] Patent CN109163047A discloses a nonlinear eddy current inertial damper and a design method, wherein the nonlinear eddy current inertial damper includes a transmission assembly, a rotary eddy current damping element, an inertial flywheel and an outer cylinder; the transmission assembly includes a ball screw system, a linear guide rail and a connecting rod; the rotary eddy current damping element includes an upper and lower magnetic circular plate, a magnet group and a conductor circular plate; the inertial flywheel is sleeved on the ball screw and fixed as a whole with the ball nut; the ball screw sequentially passes through the upper magnetic circular plate, the ball nut, the lower magnetic circular plate and the center hole of the inertial flywheel. However, the scope of application of this patent is limited to the linear motion along the axis of the ball screw, and cannot solve the problem of linear motion not along the axis of the ball screw, such as swinging motion. Summary of the invention

[0007] The purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and to provide a self-resetting semi-underground liquid storage tank with a multi-element shock-absorbing unit and a shock-absorbing method thereof. The present invention eliminates the stress concentration effect in the semi-underground liquid storage tank, while reducing the composite response of the liquid and structure in the liquid storage tank and improving the seismic toughness of the semi-underground liquid storage tank.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] One of the technical solutions of the present invention is to provide a self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit, the liquid storage tank is half-buried in the ground, the liquid storage tank is connected to the surrounding soil through a two-stage self-resetting side wall-eddy current damping-inertia capacity device, the two-stage self-resetting side wall-eddy current damping-inertia capacity device includes a two-stage self-resetting side wall unit and an eddy current damping-inertia capacity unit, the two-stage self-resetting side wall unit is arranged outside the liquid storage tank, and the two-stage self-resetting side wall unit is connected to the surrounding soil through the eddy current damping-inertia capacity unit,

[0010] The eddy current damping-inertia unit comprises an inertia part, an eddy current damping part, a screw stroke cavity, a slider, a slide rail and a hinge support. The screw stroke cavity is provided with at least one pair, one of which is connected to the two-stage self-resetting side wall unit through the slider, and the other screw stroke cavity is hinged to the surrounding soil through the hinge support. The two-stage self-resetting side wall unit is provided with a slide rail, and the slider is slidably connected in the slide rail.

[0011] The inertia part includes a rotating mass disk, a ball screw and a ball nut. The two ends of the ball screw extend into the screw travel cavity connected to the slider and the hinge support respectively. The ball screw is provided with a rotating mass disk. The ball screw is sleeved with a ball nut. The ball nut is provided with at least one pair, which are respectively embedded in the screw travel cavity connected to the slider and the hinge support.

[0012] The eddy current damping part comprises a permanent magnet. At least one pair of the permanent magnets is provided, which are respectively arranged on the screw travel cavity connected with the slider and the hinge support and sleeved on the ball nut.

[0013] Furthermore, the liquid storage tank includes an inner tank, which is provided with a dome, and the side walls of the inner tank are provided with a two-section self-resetting side wall unit of the above-ground part and an underground side wall of the underground part, and a bottom plate is provided under the bottom wall of the inner tank, the dome is connected to the two-section self-resetting side wall unit, the two-section self-resetting side wall unit is connected to the underground side wall, and the underground side wall is connected to the bottom plate.

[0014] Furthermore, a heat insulation layer is provided between the inner tank and the two-section self-resetting side wall unit, the underground side wall and the bottom plate.

[0015] Furthermore, an underground continuous wall is arranged outside the underground side wall, and a rubber pad is arranged between the underground side wall and the underground continuous wall.

[0016] Furthermore, the two-section self-resetting side wall unit includes a self-resetting upper side wall and a self-resetting lower side wall connected up and down, and the self-resetting upper side wall and the self-resetting lower side wall are anchored to the underground side wall by prestressed tendons.

[0017] As a preferred technical solution, chamfers are provided at the lower ends of the self-resetting upper side wall and the self-resetting lower side wall to provide space for the swinging movement of the self-resetting upper side wall and the self-resetting lower side wall.

[0018] Furthermore, a screw ball is arranged between the threads of the ball screw, and the ball screw rotates relative to the ball nut through the screw ball. The screw ball can reduce the friction between the ball screw and the ball nut to facilitate the rotational movement, and the ball nut is rigidly connected to the screw stroke cavity.

[0019] Furthermore, the permanent magnets are respectively arranged on the end faces opposite to the screw travel cavity connected to the slider and the hinge support, and the permanent magnets are rigidly connected to the ball nut and the screw travel cavity.

[0020] Furthermore, the rotating mass disk is arranged between the relative permanent magnets, rigidly connected to the ball screw, and includes conductor plates and non-conductor plates arranged at intervals.

[0021] As a preferred technical solution, the material of the conductor sheet is selected from one or more of copper, copper alloy, aluminum, and aluminum alloy.

[0022] As a preferred technical solution, the non-opposite end faces of one screw stroke cavity are rigidly connected to the slider via a slider connecting rod, and the non-opposite end faces of the other screw stroke cavity are hinged to the hinge support via a hinge support connecting rod.

[0023] Furthermore, a slide rail ball is arranged in the slide rail, and the slider slides relative to the slide rail through the slide rail ball. The slide rail ball can reduce the friction between the slider and the slide rail, thereby facilitating relative sliding.

[0024] One of the technical solutions of the present invention is to provide a shock absorbing method for a self-resetting semi-underground liquid storage tank having a multi-element shock absorbing unit, wherein the method is for shock absorbing the liquid storage tank, and the method comprises the following steps:

[0025] When an earthquake occurs, the ground motion is transmitted to the underground continuous wall through the surrounding soil, and further to the liquid storage tank. The rubber pad arranged between the underground side wall and the underground continuous wall has a good energy absorption and seismic isolation effect, which can effectively reduce the ground motion transmitted to the liquid storage tank.

[0026] The rubber pad cannot completely isolate the transmission of ground vibration, so the underground side wall moves horizontally, causing the self-resetting lower side wall to undergo a combined horizontal and rocking movement. The hinged connection of the hinge support provides space for the rocking movement of the self-resetting lower side wall. The slide rail is rigidly connected to the self-resetting lower side wall and also produces the same movement. The slider moves relative to the axis of the slide rail in the slide rail, causing the slider and the hinge support to move relative to each other. When the relative distance between the slider and the hinge support changes, the slider drives the screw travel cavity and the ball nut to produce relative displacement along the axis of the ball screw, and at the same time drives the ball screw and the rotating mass disk to rotate through the ball nut, thereby absorbing energy.

[0027] When the rotating mass disk rotates, the rotating motion of the conductor sheet cuts the magnetic flux lines of the permanent magnet to generate eddy current damping, thereby dissipating energy;

[0028] At the same time, under the action of prestressed tendons, the self-resetting upper side wall and the self-resetting lower side wall can return to their original positions after the earthquake.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) Compared with the traditional semi-underground liquid storage tank structure, the present invention is provided with a two-stage self-resetting side wall-eddy current damping-inertial capacity device. On the one hand, the above-ground side wall and the underground side wall are separated into two parts, and the two-stage above-ground side wall is connected by prestressed tendons, so that the above-ground side wall becomes a self-resetting structure. As a typical recoverable structure, it can be restored to its initial position after an earthquake, eliminating residual deformation, eliminating the stress concentration effect in the semi-underground liquid storage tank and improving the seismic toughness of the liquid storage tank; on the other hand, the eddy current damping-inertial capacity unit can effectively absorb vibration energy and control structural effects, and reduce the acceleration response of the sloshing liquid based on the acceleration-related inertial control force, thereby reducing the composite response of the liquid and structure of the liquid storage tank and improving the seismic toughness of the liquid storage tank; by utilizing the recovery ability of the self-resetting technology and the energy dissipation capacity of the inertial mass damper, the deformation capacity and energy absorption and energy dissipation capacity of the side wall of the liquid storage tank can be improved, the influence of stress concentration can be eliminated, and at the same time, the composite response of the structure-liquid interaction system can be reduced and the seismic toughness of the semi-underground liquid storage tank structure can be improved;

[0031] (2) The rubber pad provided between the underground side wall of the liquid storage tank and the underground continuous wall of the present invention can effectively absorb the energy during an earthquake and reduce the response of the entire semi-underground liquid storage tank structure;

[0032] (3) The eddy current damping-inertia unit of the present invention converts translation and swing into rotation, which is partially converted into damping force through the eddy current damping, thereby achieving energy absorption and dissipation;

[0033] (4) The present invention constructs a dual vibration energy isolation mechanism of a rubber pad and a two-stage self-resetting side wall unit, realizing an energy disposal path of swing energy absorption of the two-stage self-resetting side wall, efficient energy absorption of the inertia part, and efficient energy consumption of the eddy current damping part, which can effectively control the stress concentration phenomenon of the semi-buried underground liquid storage tank, reduce the comprehensive seismic response of the liquid storage tank base shear force, bending moment, deformation and wave height, and improve the seismic toughness of the semi-underground liquid storage tank structure;

[0034] (5) The two-stage self-resetting side wall-eddy current damping-inertia capacity device of the present invention is convenient and flexible to install, easy to construct and replace, and can effectively isolate, absorb and dissipate vibration energy to ensure structural safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit in an embodiment of the present invention;

[0036] Figure 2 It is a schematic structural diagram of a two-stage self-resetting side wall-eddy current damping-inertia device in an embodiment of the present invention;

[0037] Figure 3 It is a schematic structural diagram of a two-stage self-resetting side wall unit in an embodiment of the present invention;

[0038] Figure 4 Schematic diagram of the structure of the eddy current damping-inertia unit in an embodiment of the present invention;

[0039] Figure 5 It is a schematic diagram of the structure of the rotating mass disk in an embodiment of the present invention;

[0040] Figure 6 Schematic diagram of the top view of the cooperation between the slider and the slide rail in the embodiment of the present invention.

[0041] Description of the markings in the figure:

[0042] 1—dome, 2—underground side wall, 3—bottom plate, 4—thermal insulation layer, 5—inner tank, 6—underground continuous wall, 7—rubber pad, 8—two-stage self-resetting side wall-eddy current damping-inertia device, 9—self-resetting upper side wall, 10—self-resetting lower side wall, 11—prestressed tendons, 12—rotating mass disk, 13—ball screw, 14—screw ball, 15—permanent magnet, 16—ball nut, 17—screw stroke cavity, 18—slider connecting rod, 19—hinge support connecting rod, 20—slider, 21—slide rail, 22—hinge support, 23—conductor sheet, 24—non-conductor sheet, 25—slide rail ball. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used to describe common objects, which only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other way.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Example:

[0047] A self-resetting semi-underground liquid storage tank with a multi-element shock-absorbing unit, such as Figure 1 and Figure 2 As shown, the liquid storage tank is half-buried in the ground, and the liquid storage tank is connected to the surrounding soil through a two-stage self-resetting side wall-eddy current damping-inertia capacity device 8. The two-stage self-resetting side wall-eddy current damping-inertia capacity device 8 includes a two-stage self-resetting side wall unit and an eddy current damping-inertia capacity unit. A two-stage self-resetting side wall unit is arranged outside the liquid storage tank, and the two-stage self-resetting side wall unit is connected to the surrounding soil through the eddy current damping-inertia capacity unit.

[0048] The eddy current damping-inertia unit includes an inertia part, an eddy current damping part, a screw stroke cavity 17, a slider 20, a slide rail 21 and a hinge support 22. The screw stroke cavity 17 is provided with at least one pair, one of which is connected to the two-stage self-resetting side wall unit through the slider 20, and the other screw stroke cavity 17 is hinged to the surrounding soil through the hinge support 22. The two-stage self-resetting side wall unit is provided with a slide rail 21, and the slider 20 is slidably connected in the slide rail 21.

[0049] The inertia part includes a rotating mass disk 12, a ball screw 13 and a ball nut 16. The two ends of the ball screw 13 extend into a screw stroke cavity 17 connected to a slider 20 and a hinge support 22 respectively. The ball screw 13 is provided with a rotating mass disk 12. The ball screw 13 is sleeved with a ball nut 16. At least one pair of ball nuts 16 are provided, which are respectively embedded in the screw stroke cavity 17 connected to the slider 20 and the hinge support 22.

[0050] The eddy current damping part includes a permanent magnet 15, at least one pair of which are respectively arranged on a screw travel cavity 17 connected to a slider 20 and a hinge support 22, and sleeved on a ball nut 16;

[0051] In this embodiment, the two-stage self-resetting side wall unit is connected to the vertical side wall of the surrounding soil through the eddy current damping-inertia unit;

[0052] The liquid storage tank comprises an inner tank 5, on which a dome 1 is arranged, and outside the side wall of the inner tank 5 are arranged a two-stage self-resetting side wall unit of the above-ground part and an underground side wall 2 of the underground part, and a bottom plate 3 is arranged under the bottom wall of the inner tank 5, the dome 1 is connected to the two-stage self-resetting side wall unit, the two-stage self-resetting side wall unit is connected to the underground side wall 2, and the underground side wall 2 is connected to the bottom plate 3;

[0053] In this embodiment, the inner tank 5 is a film-type inner tank, the cross-section of the film-type inner tank is circular, the outer side wall of the inner tank 5 is surrounded by a two-stage self-resetting side wall unit of the above-ground part and an underground side wall 2 of the underground part, the dome 1 is rigidly connected to the upper end of the two-stage self-resetting side wall unit, the two-stage self-resetting side wall unit is vertically anchored on the underground side wall 2, and the lower end of the underground side wall 2 is rigidly connected to the bottom plate 3;

[0054] A heat insulation layer 4 is provided between the inner tank 5 and the two-stage self-resetting side wall unit, the underground side wall 2 and the bottom plate 3;

[0055] An underground continuous wall 6 is arranged outside the underground side wall 2, and a rubber pad 7 is arranged between the underground side wall 2 and the underground continuous wall 6;

[0056] In this embodiment, a rubber pad 7 is disposed around the underground side wall 2 and the underground continuous wall 6;

[0057] like Figure 3 As shown, the two-section self-resetting side wall unit includes a self-resetting upper side wall 9 and a self-resetting lower side wall 10 connected up and down, and the self-resetting upper side wall 9 and the self-resetting lower side wall 10 are anchored on the underground side wall 2 by prestressed tendons 11;

[0058] In this embodiment, the prestressed tendons 11 are prestressed steel bars, and the dome 1 is rigidly connected to the upper end of the self-resetting upper side wall 9;

[0059] The lower ends of the self-resetting upper side wall 9 and the self-resetting lower side wall 10 are chamfered to provide space for the swinging movement of the self-resetting upper side wall 9 and the self-resetting lower side wall 10;

[0060] like Figure 4 As shown, a screw ball 14 is arranged between the threads of the ball screw 13, and the ball screw 13 rotates relative to the ball nut 16 through the screw ball 14. The screw ball 14 can reduce the friction between the ball screw 13 and the ball nut 16, so as to facilitate the rotation. The ball nut 16 is rigidly connected to the screw stroke cavity 17;

[0061] The permanent magnets 15 are respectively arranged on the end faces opposite to the screw travel cavity 17 connected to the slider 20 and the hinge support 22, and the permanent magnets 15 are rigidly connected to the ball nut 16 and the screw travel cavity 17;

[0062] In this embodiment, the permanent magnet 15 is disposed around the ball nut 16;

[0063] like Figure 5 As shown, the rotating mass disk 12 is disposed between the opposite permanent magnets 15, rigidly connected to the ball screw 13, and includes a conductor sheet 23 and a non-conductor sheet 24 disposed at intervals;

[0064] In this embodiment, the shape of the rotating mass disk 12 is circular, and the shapes of the conductor sheet 23 and the non-conductor sheet 24 are both sector-shaped;

[0065] The material of the conductor sheet 23 is selected from one or more of copper, copper alloy, aluminum, and aluminum alloy. In this embodiment, the material of the conductor sheet 23 is copper alloy, and the material of the non-conductor sheet 24 is ceramic.

[0066] The non-opposite end surface of one screw stroke cavity 17 is rigidly connected to the slider 20 via the slider connecting rod 18, and the non-opposite end surface of the other screw stroke cavity 17 is hinged to the hinge support 22 via the hinge support connecting rod 19;

[0067] In this embodiment, one screw rod stroke cavity 17 is rigidly connected to the slider connecting rod 18, and the other screw rod stroke cavity 17 is rigidly connected to the hinge support connecting rod 19;

[0068] like Figure 6 As shown, a slide rail ball 25 is disposed in the slide rail 21, and the slider 20 slides relative to the slide rail 21 through the slide rail ball 25. The slide rail ball 25 can reduce the friction between the slider 20 and the slide rail 21, so as to facilitate relative sliding;

[0069] In this embodiment, the hinge support 22 uses a spherical hinge, which can rotate at multiple angles. When the earthquake propagates in different directions, the spherical shape allows the screw stroke cavity 17 to move. The outer vertical side wall of the self-resetting lower side wall 10 is rigidly connected to the slide rail 21, and the vertical side wall of the surrounding soil is rigidly connected to the hinge support 22.

[0070] A shock absorbing method for a self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit is provided, wherein the shock absorbing method is performed on the liquid storage tank, and the specific steps are as follows:

[0071] When an earthquake occurs, the ground motion is transmitted to the underground continuous wall 6 through the surrounding soil, and further to the liquid storage tank. The rubber pad 7 arranged between the underground side wall 2 and the underground continuous wall 6 has a good energy absorption and seismic isolation effect, which can effectively reduce the ground motion transmitted to the liquid storage tank.

[0072] The rubber pad 7 cannot completely isolate the transmission of ground vibration, so the underground side wall 2 moves horizontally, causing the self-resetting lower side wall 10 to undergo a combined horizontal and rocking movement. The hinged connection of the hinge support 22 provides space for the rocking movement of the self-resetting lower side wall 10. The slide rail 21 is rigidly connected to the self-resetting lower side wall 10 and also produces the same movement. The slider 20 moves relative to the axis of the slide rail 21 in the slide rail 21, causing the slider 20 and the hinge support 22 to move relative to each other. When the relative distance between the slider 20 and the hinge support 22 changes, the slider 20 drives the screw stroke cavity 17 and the ball nut 16 to produce relative displacement along the axis of the ball screw 13, and at the same time drives the ball screw 13 and the rotating mass disk 12 to rotate through the ball nut 16, thereby absorbing energy.

[0073] When the rotating mass disk 12 rotates, the rotating motion of the conductor sheet 23 cuts the magnetic flux lines of the permanent magnet 15 to generate eddy current damping, thereby dissipating energy;

[0074] At the same time, under the action of the prestressed tendons 11, the self-resetting upper side wall 9 and the self-resetting lower side wall 10 can return to their original positions after the earthquake.

[0075] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A self-resetting semi-underground liquid storage tank with a multi-element shock-absorbing unit, characterized in that: The liquid storage tank is half-buried in the ground, and the liquid storage tank is connected to the surrounding soil through a two-stage self-resetting side wall-eddy current damping-inertia capacity device (8). The two-stage self-resetting side wall-eddy current damping-inertia capacity device (8) comprises a two-stage self-resetting side wall unit and an eddy current damping-inertia capacity unit. The two-stage self-resetting side wall unit is arranged outside the liquid storage tank, and the two-stage self-resetting side wall unit is connected to the surrounding soil through the eddy current damping-inertia capacity unit. The eddy current damping-inertia unit comprises an inertia part, an eddy current damping part, a screw stroke cavity (17), a slider (20), a slide rail (21) and a hinge support (22); the screw stroke cavity (17) is provided with at least one pair, one of the screw stroke cavities (17) is connected to the two-stage self-resetting side wall unit through the slider (20), and the other screw stroke cavity (17) is hinged to the surrounding soil through the hinge support (22); the two-stage self-resetting side wall unit is provided with a slide rail (21), and the slider (20) is slidably connected in the slide rail (21). The inertia portion comprises a rotating mass disk (12), a ball screw (13) and a ball nut (16); two ends of the ball screw (13) respectively extend into a screw travel cavity (17) connected to a slider (20) and a hinge support (22); a rotating mass disk (12) is arranged on the ball screw (13); a ball nut (16) is sleeved on the ball screw (13); at least one pair of ball nuts (16) are provided, and are respectively embedded in the screw travel cavity (17) connected to the slider (20) and the hinge support (22); The eddy current damping part comprises a permanent magnet (15), at least one pair of which are respectively arranged on a screw travel cavity (17) connected to a slider (20) and a hinge support (22), and sleeved on a ball nut (16).

2. A self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 1, characterized in that: The liquid storage tank comprises an inner tank (5), on which a dome (1) is arranged, and the side walls of the inner tank (5) are provided with a two-section self-resetting side wall unit of the above-ground part and an underground side wall (2) of the underground part, and a bottom plate (3) is arranged under the bottom wall of the inner tank (5), the dome (1) is connected to the two-section self-resetting side wall unit, the two-section self-resetting side wall unit is connected to the underground side wall (2), and the underground side wall (2) is connected to the bottom plate (3).

3. A self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 2, characterized in that: A heat insulation layer (4) is provided between the inner tank (5), the two-stage self-resetting side wall unit, the underground side wall (2) and the bottom plate (3).

4. A self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 2, characterized in that: An underground continuous wall (6) is arranged outside the underground side wall (2), and a rubber pad (7) is arranged between the underground side wall (2) and the underground continuous wall (6).

5. The self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 1, characterized in that: The two-section self-resetting side wall unit comprises a self-resetting upper side wall (9) and a self-resetting lower side wall (10) connected up and down, and the self-resetting upper side wall (9) and the self-resetting lower side wall (10) are anchored on the underground side wall (2) through prestressed tendons (11).

6. A self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 1, characterized in that: A screw ball (14) is arranged between the threads of the ball screw (13), and the ball screw (13) rotates relative to a ball nut (16) via the screw ball (14), and the ball nut (16) is rigidly connected to a screw stroke cavity (17).

7. A self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 1, characterized in that: The permanent magnets (15) are respectively arranged on the end faces opposite to the screw travel cavity (17) connected to the slider (20) and the hinge support (22), and the permanent magnets (15) are rigidly connected to the ball nut (16) and the screw travel cavity (17).

8. A self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 7, characterized in that: The rotating mass disk (12) is arranged between the opposite permanent magnets (15), rigidly connected to the ball screw (13), and comprises a conductor sheet (23) and a non-conductor sheet (24) arranged at intervals.

9. The self-resetting semi-underground liquid storage tank with a multi-element shock absorbing unit according to claim 1, characterized in that: A slide rail ball (25) is arranged in the slide rail (21), and the slider (20) slides relative to the slide rail (21) via the slide rail ball (25).

10. A shock absorbing method for a self-resetting semi-underground liquid storage tank having a multi-element shock absorbing unit, characterized in that: The method is for damping the fluid storage tank according to any one of claims 1 to 9, and the method comprises the following steps: When an earthquake occurs, the earthquake vibration is transmitted to the underground continuous wall (6) through the surrounding soil, and further transmitted to the liquid storage tank. The rubber pad (7) arranged between the underground side wall (2) and the underground continuous wall (6) has an energy absorption and seismic isolation effect, thereby reducing the earthquake vibration transmitted to the liquid storage tank. The underground side wall (2) undergoes horizontal movement, causing the self-resetting lower side wall (10) to undergo a combined horizontal and swinging movement. The hinged connection of the hinge support (22) provides space for the swinging movement of the self-resetting lower side wall (10). The slide rail (21) is rigidly connected to the self-resetting lower side wall (10) and also produces the same movement. The slider (20) undergoes relative movement along the axis of the slide rail (21) in the slide rail (21), causing the slider (20) and the hinge support (22) to undergo relative movement. When the relative distance between the slider (20) and the hinge support (22) changes, the slider (20) drives the screw travel cavity (17) and the ball nut (16) to produce relative displacement along the axis of the ball screw (13), and at the same time drives the ball screw (13) and the rotating mass disk (12) to undergo rotational movement through the ball nut (16), thereby absorbing energy. When the rotating mass disk (12) rotates, the rotating motion of the conductor sheet (23) cuts the magnetic flux lines of the permanent magnet (15) to generate eddy current damping, thereby dissipating energy; At the same time, under the action of the prestressed tendons (11), the self-resetting upper side wall (9) and the self-resetting lower side wall (10) return to their original positions after the earthquake.

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