A tensile pull-out double protection device

Abstract

The present invention provides a double anti-pulling protection device, which includes an upper bearing plate, a lower bearing plate and a rubber isolation bearing. The upper bearing plate and the lower bearing plate are respectively arranged at both ends of the rubber isolation bearing. It is characterized in that a plurality of anti-pulling protection mechanisms are provided on both the upper bearing plate and the lower bearing plate. The anti-pulling protection mechanism includes an anti-pulling end plate and a sleeve. The anti-pulling end plate and the lower bearing plate are parallelly connected to both ends of the sleeve. A screw hole core rod, a buffer block and a connector are sequentially placed in the sleeve. A connecting rod is provided in the sleeve, and the connecting rod sequentially passes through the connector and the buffer block and is connected to the screw hole core rod. This double anti-pulling protection device, by arranging a plurality of anti-pulling protection mechanisms at both ends of the rubber isolation bearing and hiding them in the building bearing connecting members, serves the purpose of providing ultimate anti-pulling force insurance and increasing the buffer of the pulling stiffness.

Description

Technical Field

[0001] The present invention belongs to the technical field of seismic isolation, and in particular to a double protection device against tensile pullout. Background Art

[0002] At present, an effective seismic isolation structure for natural disasters is to set a seismic isolation device between the bottom of the structure and the foundation to extend the natural vibration period of the structure and absorb energy, thereby reducing the response of the upper structure. Currently, under natural disasters such as seismic waves, typhoons, and tsunamis, for buildings, bridges, and other engineering structures, the overall structure will undergo vertical inclination, lateral overturning and torsion, resulting in corner tensile pullout, and further damage to the overall structure due to local structural faults. Summary of the Invention

[0003] Aiming at the deficiencies existing in the prior art, the present invention provides a double protection device against tensile pullout. By setting a plurality of tensile pullout protection mechanisms at both ends of the rubber seismic isolation bearing and hiding them in the building bearing connection components, the purpose of providing ultimate tensile force insurance and increasing the buffer by providing tensile stiffness is achieved. The technical solution adopted by the present invention is as follows:

[0004] A double protection device against tensile pullout includes an upper bearing plate, a lower bearing plate, and a rubber seismic isolation bearing. The upper bearing plate and the lower bearing plate are respectively arranged at both ends of the rubber seismic isolation bearing. It is characterized in that a plurality of tensile pullout protection mechanisms are provided on both the upper bearing plate and the lower bearing plate;

[0005] The tensile pullout protection mechanism includes a tensile pullout end plate and a sleeve. The tensile pullout end plate and the lower bearing plate are connected in parallel to both ends of the sleeve;

[0006] A screw hole core rod, a buffer block, and a connector are sequentially placed in the sleeve;

[0007] A connecting rod is provided in the sleeve. The connecting rod sequentially passes through the connector and the buffer block and is connected to the screw hole core rod.

[0008] Further, a step is machined at the end of the sleeve close to the tensile pullout end plate, which is matched with the step on the outer circle of the screw hole core rod. The screw hole core rod slides back and forth along the inner hole of the sleeve, and uses the step as the lower limit.

[0009] Furthermore, under the action of the screw hole core rod, the buffer block slides back and forth in the inner hole of the sleeve.

[0010] Further, one end of the connector contacts the buffer block, and the other end is pressed in the sleeve by the lower bearing plate through a stepped groove.

[0011] Further, the connecting rod sequentially passes through the connecting head and the buffer block and is connected to the screw hole core rod, and is used to drive the screw hole core rod to slide back and forth along the inner hole of the sleeve.

[0012] Further, if the rubber isolation bearing is circular, a plurality of the anti-pullout protection mechanisms are equidistantly distributed around the circumference; if the rubber isolation bearing is square, a plurality of the anti-pullout protection mechanisms are arranged at the four corners of the rubber isolation bearing.

[0013] Furthermore, a plurality of the anti-pullout protection mechanisms are pre-set in the embedded parts at both ends of the rubber isolation bearing, and the anti-pullout protection mechanisms are connected to the bearing plates at both ends of the rubber isolation bearing through the connecting rod.

[0014] The advantages of the present invention are as follows:

[0015] 1) The anti-pullout double protection device is only hidden in the embedded parts without any requirements for external construction and space, and does not add any construction tasks on the basis of the original component on-site construction.

[0016] 2) The anti-pullout double protection device can meet the force design value requirements of any different structures through the quantity and specification layout of a plurality of anti-pullout protection mechanisms.

[0017] 3) When the main structure is deformed or displaced within a very short time under impact, the buffer block in the device can play a certain buffering role, and at the same time, different materials of buffer blocks can be used according to the structural force calculation to determine the anti-pull displacement value and the additional stiffness value.

[0018] 4) By adjusting the material strength of the screw hole core rod, the anti-pull limit value can be set. When the limit value is reached or exceeded, the connecting rod and the screw hole core rod will be disconnected, avoiding excessive local connection strength from damaging the main structure.

[0019] 5) The device has a wide range of applications and can not only be used for seismic and wind resistance of newly built civil engineering structures, but also be widely used in seismic reinforcement or post-earthquake repair projects of existing civil engineering. It has strong economic practicality and good applicability, and basically has no maintenance cost. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an anti-pullout double protection device in an embodiment of the present invention.

[0021] Figure 2 It is a cross-sectional view of an anti-pullout double protection device in an embodiment of the present invention.

[0022] Figure 3 It is a cross-sectional view of an anti-pullout protection mechanism in an embodiment of the present invention.

[0023] Figure 4It is a partial cross-sectional view of the anti-pull-out protection mechanism in the embodiment of the present invention.

[0024] Figure 5 It is a state diagram of a double anti-pull-out protection device in the embodiment of the present invention under the conditions of horizontal deformation and vertical pull-out displacement of the main member.

[0025] Figure 6 It is a compression state diagram of the anti-pull-out protection mechanism in the embodiment of the present invention. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] As Figures 1-4 shown, a double anti-pull-out protection device proposed in the embodiment of the present invention, the double protection against pull-out is abbreviated as "DPPR" in English "Double protection pull-out resistance", includes an upper bearing plate 1, a lower bearing plate 2 and a rubber isolation bearing 3. The upper bearing plate 1 and the lower bearing plate 2 are respectively arranged at both ends of the rubber isolation bearing 3; a plurality of anti-pull-out protection mechanisms 4 are provided on both the upper bearing plate 1 and the lower bearing plate 2; if the rubber isolation bearing 3 is circular, the plurality of anti-pull-out protection mechanisms 4 are evenly distributed around the circumference; if the rubber isolation bearing 3 is square, the plurality of anti-pull-out protection mechanisms 4 are arranged at the four corners of the rubber isolation bearing 3; the plurality of anti-pull-out protection mechanisms 4 are pre-set in the embedded parts 5 at both ends of the rubber isolation bearing 3, and the anti-pull-out protection mechanism 4 is connected to the bearing plates at both ends of the rubber isolation bearing 3 through the connecting rod 406.

[0028] Specifically, the anti-pull-out protection mechanism 4 includes an anti-pull-out end plate 401 and a sleeve 402. The anti-pull-out end plate 401 and the lower bearing plate 2 are connected in parallel to both ends of the sleeve 402; a screw hole core rod 403, a buffer block 404 and a connector 405 are sequentially placed in the sleeve 402; a connecting rod 406 is provided in the sleeve 402, and the connecting rod 406 sequentially passes through the connector 405 and the buffer block 404 and is connected to the screw hole core rod 403.

[0029] Specifically, a step is machined at the end of the sleeve 402 close to the uplift end plate 401, which is matched with the step on the outer circle of the screw hole core rod 403. The screw hole core rod 403 slides back and forth along the inner hole of the sleeve 402, and uses the step as the lower limit; the buffer block 404 slides back and forth in the inner hole of the sleeve 402 under the action of the screw hole core rod 403; one end of the connector 405 contacts the buffer block 404, and the other end is pressed into the sleeve 402 by the lower bearing plate 2 through a stepped groove; the connecting rod 406 sequentially passes through the connector 405 and the buffer block 404 and is connected to the screw hole core rod 403, and is used to drive the screw hole core rod 403 to slide back and forth along the inner hole of the sleeve 402. When the structure body deforms or displaces within a very short time under impact, the buffer block 404 in the device can play a certain buffering role. By using buffer blocks of different materials, such as rubber, polyurethane, ordinary springs, disc springs, composite materials, etc., different buffering displacement values and stiffness values can be provided. Through structural force calculation, the tensile displacement value and additional stiffness value can be determined to meet different seismic requirements.

[0030] In some embodiments, the connecting rod 406 and the screw hole core rod 403 can be connected by thread connection, snap connection, pin connection or inclined plane connection. When the structure body deforms or displaces within a very short time under impact, the buffer block in the device can play a certain buffering role. When the limit value is reached or exceeded, the connecting rod 406 and the screw hole core rod 403 will be disconnected to avoid excessive local connection strength from damaging the structure body.

[0031] During use, such as Figures 1-6As shown in the figure, first assemble multiple tensile protection mechanisms 4. The process is as follows: First, firmly weld the anti-pulling end plate 401 to the bottom circle of the sleeve 402. Then, sequentially insert the screw hole core rod 403 and the buffer block 404 into the sleeve 402. Next, screw the connector 405 into the sleeve 402 along the external thread until the stepped groove is flush with the opening of the sleeve 402, and then press it with the lower bearing plate 2. Then, one by one, insert the assembled sleeve 402 into the hole of the embedded part 5, and then weld the sleeve 402 and the lower bearing plate 2 in a circumferential weld for pre-embedding and forming. Then, connect it to the main structure by means of casting, anchoring, welding, etc. Finally, connect the main structure and the rubber isolation bearing 3 through the connecting rod 406. During the connection process, just make the head end of the connecting rod 406 fit with the end face of the rubber isolation bearing 3. At this time, the buffer block 404 is in a pre-tightened state between the screw hole core rod 403 and the connector 405, that is, in the best buffer state. When natural forces such as earthquakes, wind vibrations, tsunamis or human factors generate impact forces, causing the main structure to be displaced and tilted relative to the ground surface, horizontal shear forces and vertical pulling forces will appear at the connection part of the main structure. At this time, the horizontal shear force is borne by the connecting rod 406 and the sleeve 402 assembly. At the same time, the screw hole core rod 403 connected by the connecting rod 406 is pulled up and squeezes the buffer block 404. When it is pulled up to the design limit value or the extreme displacement, the connection between the connecting rod 406 and the screw hole core rod 403 is damaged and detached, which can effectively avoid excessive local connection strength and damage to the main structure. This double tensile protection device provides tensile force for the overall engineering structure to avoid corner fractures caused by bending moments. The tensile force it can bear can be designed to more than 50 to 3000 tons. Just increasing the arrangement quantity and material strength of the tensile protection mechanism 4 on the component can meet the design requirements. The internal buffer block 404 can reduce and extend the damage cycle of the external impact on the main structure, thereby protecting each component and member from being damaged by the impact force. At the same time, by setting the failure limit value of the connection between the screw hole core rod 403 and the connecting rod 406, the structural damage caused by excessive local connection strength can be avoided. The set failure pulling insurance value can reach 0 to 900 Mpa or above, and after reaching the ultimate anti-pulling force value, releasing the local deformation amount can meet the larger displacement required by the overall main structure after bearing the impact, further protecting the main structure.

[0032] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A tensile pull-out double protection device, comprising an upper bearing plate (1), a lower bearing plate (2) and a rubber isolation bearing (3), wherein the upper bearing plate (1) and the lower bearing plate (2) are respectively arranged at both ends of the rubber isolation bearing (3); characterized in that, A plurality of anti-pulling protection mechanisms (4) are provided on both the upper bearing pressure plate (1) and the lower bearing pressure plate (2); The anti-pulling protection mechanism (4) includes an anti-pulling end plate (401) and a sleeve (402), and the anti-pulling end plate (401) and the lower bearing pressure plate (2) are connected in parallel to both ends of the sleeve (402); A screw hole core rod (403), a buffer block (404) and a connector (405) are sequentially placed in the sleeve (402); A connecting rod (406) is provided in the sleeve (402), and the connecting rod (406) sequentially passes through the connector (405) and the buffer block (404) and is connected to the screw hole core rod (403); A step is machined at the end of the sleeve (402) close to the anti-pulling end plate (401), which matches the step on the outer circle of the screw hole core rod (403). The screw hole core rod (403) slides back and forth along the inner hole of the sleeve (402), and uses the step as the lower limit; under the action of the screw hole core rod (403), the buffer block (404) slides back and forth in the inner hole of the sleeve (402); One end of the connector (405) contacts the buffer block (404), and the other end is pressed into the sleeve (402) by the lower bearing pressure plate (2) through a stepped groove; A plurality of the anti-pulling protection mechanisms (4) are pre-set in the embedded parts (5) at both ends of the rubber isolation bearing (3), and the anti-pulling protection mechanisms (4) are connected to the bearing pressure plates at both ends of the rubber isolation bearing (3) through the connecting rods (406).

2. The double anti-pulling protection device according to claim 1, characterized in that, The connecting rod (406) sequentially passes through the connector (405) and the buffer block (404) and is connected to the screw hole core rod (403) for driving the screw hole core rod (403) to slide back and forth along the inner hole of the sleeve (402).

3. The double anti-pulling protection device according to claim 1, characterized in that, If the rubber isolation bearing (3) is circular, a plurality of the anti-pulling protection mechanisms (4) are equidistantly distributed around the circumference; if the rubber isolation bearing (3) is square, a plurality of the anti-pulling protection mechanisms (4) are arranged at the four corners of the rubber isolation bearing (3).

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