Anti-separation friction pendulum shock insulation support

Abstract

The invention discloses an anti-separation friction pendulum shock insulation support, and belongs to the technical field of shock insulation. Comprising a lower seat plate, an upper seat plate and a spherical crown body mechanism, the upper seat plate and the lower seat plate are each provided with an inwards-concave spherical surface, the side, provided with the inwards-concave spherical surface, of the upper seat plate corresponds to the side, provided with the inwards-concave spherical surface, of the lower seat plate, and the inwards-concave spherical surface of the upper seat plate abuts against the top end of the spherical crown body mechanism; the bottom end of the spherical crown body mechanism abuts against the inwards-concave spherical surface of the lower base plate, a plurality of threaded holes are formed in the outer walls of the upper base plate and the lower base plate in the circumferential direction, detachable temporary connecting pieces are connected to the threaded holes, and the upper base plate and the lower base plate are connected and fixed through bolts and the corresponding temporary connecting pieces. It can be guaranteed that the shock insulation support is still kept in a pressed state when the structure bears tension.

Description

Technical Field

[0001] The present invention belongs to the technical field of seismic isolation, and particularly relates to an anti-separation friction pendulum seismic isolation bearing. Background Art

[0002] A friction pendulum seismic isolation bearing is a seismic isolation bearing that extends the vibration period of a structure through spherical swinging and dissipates seismic energy through friction at the sliding interface to achieve the seismic isolation function. Due to its high vertical bearing capacity, controllable processing accuracy, and self-centering ability after an earthquake, the friction pendulum seismic isolation bearing is widely used in related industries such as bridges and buildings.

[0003] In actual engineering applications, under the action of rare earthquakes, the inertial force generated by a building structure due to strong horizontal earthquake action acts on the centroid, forming a couple with the base reaction force, thereby generating an overturning moment. When the overturning moment is too large, the stress situation of the seismic isolation bearings in the structure becomes extremely complex. The overturning moment causes the structure to rotate around the base, resulting in an increase in compression on one side of the seismic isolation bearing and tension on the other side; the difference in the lever arm of the bearing from the rotation center will also cause uneven stress distribution, and the edge bearings may bear tension. Since the currently common friction pendulum seismic isolation bearings can only bear compression and cannot bear tension, this situation will have a greater adverse impact.

[0004] Therefore, how to provide an anti-separation friction pendulum seismic isolation bearing is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The main object of the present invention is to provide an anti-separation friction pendulum seismic isolation bearing to solve the above technical problems. The device is provided with a spherical crown body mechanism, which can ensure that the seismic isolation bearing bears vertical pressure and tension, and at the same time, the use of fixed connectors and temporary connectors can prevent the seismic isolation bearing from separating, and the overall structure is simple and the cost is lower.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An anti-separation friction pendulum seismic isolation bearing, comprising a lower seat plate, an upper seat plate, and a spherical crown body mechanism. Concave spherical surfaces are provided on both the upper seat plate and the lower seat plate. The side of the upper seat plate provided with the concave spherical surface corresponds to the side of the lower seat plate provided with the concave spherical surface, and the concave spherical surface of the upper seat plate abuts against the top of the spherical crown body mechanism, and the bottom of the spherical crown body mechanism abuts against the concave spherical surface of the lower seat plate. A plurality of threaded holes are circumferentially provided on the outer walls of the upper seat plate and the lower seat plate, and temporary connectors can be detachably connected to the threaded holes. The upper seat plate and the lower seat plate are connected and fixed by bolts and corresponding temporary connectors.

[0008] Further, the spherical crown body mechanism includes a lower spherical crown body, an upper spherical crown body, a friction plate, a guide shaft, and a disc spring. The lower spherical crown body and one side of the upper spherical crown body are both provided with spherical crown surfaces. A clamping groove is provided on the side of the upper spherical crown body away from the spherical crown surface. The upper spherical crown body is engaged with the side of the lower spherical crown body away from the spherical crown surface through the clamping groove. The spherical crown surface of the upper spherical crown body is in mutual contact with the concave spherical surface of the upper seat plate, and the spherical crown surface of the lower spherical crown body is in mutual contact with the concave spherical surface of the lower seat plate. A plurality of grooves are correspondingly provided on the side of the lower spherical crown body away from the spherical crown surface and on the inner wall of the clamping groove of the upper spherical crown body. Guide shafts are connected in the grooves, and disc springs are sleeved on the guide shafts. One end of the disc spring is connected to the inner wall of the groove of the upper spherical crown body, and the other end of the disc spring is connected to the inner wall of the groove corresponding to the groove in the lower spherical crown body and the upper spherical crown body.

[0009] Further, stainless steel plates are provided at the concave spherical surfaces of the upper seat plate and the lower seat plate, and friction plates are provided on the spherical crown surfaces of the upper spherical crown body and the lower spherical crown body.

[0010] Further, the spherical crown surface and the concave spherical surface have the same radius of curvature.

[0011] Further, a plurality of flanges are also provided circumferentially on the upper seat plate and the lower seat plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention is provided with a spherical crown body mechanism, which can ensure that the seismic isolation bearing bears the pressure and tension in the vertical direction. At the same time, the use of fixed connecting pieces and temporary connecting pieces can prevent the seismic isolation bearing from separating. The overall structure is simple and the cost is lower.

[0014] 2. The disc spring provided in the present invention can effectively resist the destructive effect of vertical forces. The seismic isolation bearing can be effectively reset after bearing the vertical load, reducing the influence of seismic forces on the bearing, improving the bearing capacity of the seismic isolation bearing for tension and pressure, and broadening the application range of the friction pendulum seismic isolation bearing.

[0015] 3. The seismic isolation bearing in the present invention can greatly improve the reliability of the friction pendulum seismic isolation bearing and the structural safety through the cooperation of the spherical crown body mechanism, fixed connecting pieces and temporary connecting pieces. Even under the action of rare earthquakes, no large damage will occur. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0017] Figure 1 It is a schematic front sectional structure view of the present invention.

[0018] Figure 2 It is a schematic structure view of the present invention.

[0019] Figure 3 It is a schematic top sectional structure view of the present invention.

[0020] Figure 4 It is a schematic structure view of a spherical crown body.

[0021] Wherein, 1 - lower spherical crown body, 2 - upper spherical crown body, 3 - friction plate, 4 - guiding shaft, 5 - disc spring, 6 - lower seat plate, 7 - upper seat plate, 8 - stainless steel plate, 9 - temporary connecting piece, 10 - flange. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] As Figures 1 to 4 shown, the present invention provides an anti-separation friction pendulum isolation bearing, including a lower seat plate 6, an upper seat plate 7 and a spherical crown body mechanism. Concave spherical surfaces are provided on both the upper seat plate 7 and the lower seat plate 6. The side of the upper seat plate 7 provided with the concave spherical surface corresponds to the side of the lower seat plate 6 provided with the concave spherical surface, and the concave spherical surface of the upper seat plate 7 abuts against the top end of the spherical crown body mechanism, and the bottom end of the spherical crown body mechanism abuts against the concave spherical surface of the lower seat plate 6. A plurality of threaded holes are circumferentially provided on the outer walls of the upper seat plate 7 and the lower seat plate 6, and temporary connecting pieces 9 can be detachably connected at the threaded holes. The upper seat plate 7 and the lower seat plate 6 are connected and fixed by bolts and the corresponding temporary connecting pieces 9.

[0024] In this embodiment, the spherical crown mechanism includes a lower spherical crown body 1, an upper spherical crown body 2, a friction plate 3, a guide shaft 4 and a disc spring 5. A spherical crown surface is provided on one side of the lower spherical crown body 1 and the upper spherical crown body 2, and a groove is provided on the side of the upper spherical crown body 2 away from the spherical crown surface. The upper spherical crown body 2 is buckled with the side of the lower spherical crown body 1 away from the spherical crown surface through the groove. The spherical crown surface of the upper spherical crown body 2 abuts against the concave spherical surface of the upper seat plate 7, and the spherical crown surface of the lower spherical crown body 1 abuts against the concave spherical surface of the lower seat plate 6. A plurality of grooves are correspondingly provided on the side of the lower spherical crown body 1 away from the spherical crown surface and on the inner wall of the groove of the upper spherical crown body 2, and a guide shaft 4 is connected in each groove. A disc spring 5 is sleeved on the guide shaft 4, and one end of the disc spring 5 is connected to the upper spherical crown body 2, the other end of the disc spring 5 is connected to the inner wall of the groove corresponding to the groove in the lower spherical crown 1 and the upper spherical crown 2; the multiple grooves are distributed in a circular array relative to the center position of the upper spherical crown 2 and the lower spherical crown 1. Since the upper seat plate 7 and the lower seat plate 6 are mirror-imaged, when the upper spherical crown 2 and the lower spherical crown 1 are arranged in the middle, the force and motion state of the spherical crown mechanism as a whole when subjected to vibration are closer to those of the traditional friction pendulum seismic isolation bearing; the disc spring 5 can extend and shorten in the vertical direction under the action of external load, so that the bearing as a whole maintains a compressed state at any time to ensure normal use; in addition, the annular protrusion of the upper spherical crown 2 can prevent the upper spherical crown 2 and the lower spherical crown 1 from being offset when the spherical crown mechanism slides, ensuring that the upper spherical crown 2 and the lower spherical crown 1 move together.

[0025] In this embodiment, a stainless steel plate 8 is provided at the concave spherical surface of the upper seat plate 7 and the lower seat plate 6; a spherical stainless steel plate 8 is embedded in the concave spherical surface of the upper seat plate 7 and the lower seat plate 6 through a countersunk screw, and an ultra-low friction coefficient coating is sprayed on the upper surface of the stainless steel plate 8, which has the characteristics of ultra-high wear resistance and ultra-low friction coefficient; the coating can adopt polyurethane coating, polyester coating and the like in the prior art, and the coating with low friction coefficient can reduce the friction force when the seismic isolation body is started and slides relative to the upper seat plate 7 and the lower seat plate 6, thereby enhancing the seismic isolation effect and reducing vibration damage; friction plates 3 are provided on the spherical crown surfaces of the upper spherical crown body 2 and the lower spherical crown body 1, and the friction material used by the friction plate 3 includes but is not limited to polytetrafluoroethylene, modified polytetrafluoroethylene or modified ultra-high molecular weight polyethylene and other materials, and the friction material can consume part of the earthquake energy to improve the seismic isolation effect.

[0026] In this embodiment, the spherical crown surface and the concave spherical surface have the same curvature radius.

[0027] In this embodiment, the upper seat plate 7 and the lower seat plate 6 are further provided with a plurality of flanges 10 in the circumferential direction, and the flanges 10 are further provided with threaded holes for connection with embedded parts.

[0028] Working principle:

[0029] When an earthquake causes the upper seat plate 7 and the spherical crown body mechanism to move vertically, the disc spring 5 in the groove can elongate and compress along with the movement, ensuring the compression state of the lower seat plate 6, and can automatically reset after the vibration to continue maintaining the normal seismic isolation function.

[0030] Since the pressures and vibration periods of different projects and structures vary, in practical applications, the effective area of the spherical crown surface and the number of disc springs 5 can be adjusted to adapt to different working conditions.

[0031] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A friction pendulum isolation bearing for preventing separation, characterized in that, It includes a lower seat plate (6), an upper seat plate (7) and a spherical crown body mechanism. Concave spherical surfaces are provided on both the upper seat plate (7) and the lower seat plate (6). The side of the upper seat plate (7) with the concave spherical surface corresponds to the side of the lower seat plate (6) with the concave spherical surface. And the concave spherical surface of the upper seat plate (7) abuts against the top end of the spherical crown body mechanism, and the bottom end of the spherical crown body mechanism abuts against the concave spherical surface of the lower seat plate (6). A plurality of threaded holes are circumferentially provided on the outer walls of the upper seat plate (7) and the lower seat plate (6), and a temporary connector (9) can be detachably connected at each threaded hole. The upper seat plate (7) and the lower seat plate (6) are connected and fixed by bolts and the corresponding temporary connectors (9).

2. The anti-separation friction pendulum isolation bearing according to claim 1, characterized in that, The spherical crown body mechanism includes a lower spherical crown body (1), an upper spherical crown body (2), a friction plate (3), a guide shaft (4) and a disc spring (5). Ball crown surfaces are provided on one side of both the lower spherical crown body (1) and the upper spherical crown body (2). A clamping groove is provided on the side of the upper spherical crown body (2) away from the ball crown surface. The upper spherical crown body (2) is buckled with the side of the lower spherical crown body (1) away from the ball crown surface through the clamping groove. The ball crown surface of the upper spherical crown body (2) abuts against the concave spherical surface of the upper seat plate (7), and the ball crown surface of the lower spherical crown body (1) abuts against the concave spherical surface of the lower seat plate (6). A plurality of grooves are correspondingly provided on the side of the lower spherical crown body (1) away from the ball crown surface and the inner wall of the clamping groove of the upper spherical crown body (2). Guide shafts (4) are connected in the grooves, and disc springs (5) are sleeved on the guide shafts (4). One end of the disc spring (5) is connected to the inner wall of the groove of the upper spherical crown body (2), and the other end of the disc spring (5) is connected to the inner wall of the groove corresponding to the groove in the lower spherical crown body (1) and the upper spherical crown body (2).

3. The anti-separation friction pendulum isolation bearing according to claim 2, characterized in that, Stainless steel plates (8) are provided at the concave spherical surfaces of the upper seat plate (7) and the lower seat plate (6), and friction plates (3) are provided on the ball crown surfaces of the upper spherical crown body (2) and the lower spherical crown body (1).

4. The anti-separation friction pendulum isolation bearing according to claim 3, characterized in that, The radius of curvature of the ball crown surface and the concave spherical surface is the same.

5. The anti-separation friction pendulum isolation bearing according to claim 3, characterized in that, A plurality of flanges (10) are also circumferentially provided on the upper seat plate (7) and the lower seat plate (6).

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