CN215253620U

CN215253620U - Three-dimensional shock isolation device

Info

Publication number: CN215253620U
Application number: CN202120838703.7U
Authority: CN
Inventors: 欧阳郁汀; 施竹珺
Original assignee: Shanghai Rb Vibration Science And Technology Co ltd
Current assignee: Shanghai Rb Vibration Science And Technology Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-21
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses a three-dimensional shock isolation device includes bearing frame, perpendicularly to shock mitigation system and level to shock mitigation system, bearing frame includes upper ledge, lower ring roof beam and the bottom plate that top-down set gradually, the top and the target shock insulation of upper ledge are connected, set up between upper ledge and the lower ring roof beam perpendicularly to shock mitigation system, set up between lower ring roof beam and the bottom plate the level is to shock mitigation system. The three-dimensional shock isolation device of the utility model can realize the three-dimensional shock absorption function, the reset function and the guarantee function; vertical shock insulation periods can be adjusted by adjusting parameters of the vertical shock absorption device, and horizontal shock insulation periods can be adjusted by changing parameters of the horizontal shock insulation sliding table. The device can improve the safety and the comfort of the structure, and has the characteristics of low manufacturing cost, excellent weather resistance, simple structure, safety, reliability and the like.

Description

Three-dimensional shock isolation device

Technical Field

The utility model belongs to the technical field of civil engineering's seismic isolation technique and specifically relates to a three-dimensional seismic isolation device.

Background

Earthquake disasters cause immeasurable loss of lives and properties to the human society. In order to comprehensively prevent and treat the influence of earthquake action on the civil engineering structure, a common engineering technology is a seismic isolation technology. Seismic isolation systems have been found to be effective in reducing the effects of seismic events over long periods of practical activity.

The common shock insulation support at present mainly comprises a rubber shock insulation support. However, according to the existing production technology and the material characteristics of the rubber itself, the rubber isolation bearing has a plurality of inherent defects, including: 1. according to the existing technical conditions, the production of the qualified rubber support with low horizontal rigidity is difficult; 2. the vertical rigidity of the rubber is not beneficial to reducing the vertical earthquake effect; 3. the residual deformation of the rubber shock-insulation support is not easy to repair; 4. the lead core rubber support is internally provided with metal lead, so that the production, the processing and the use of the lead core rubber support can cause environmental pollution.

There is therefore a need for a better way to ameliorate the above-mentioned disadvantages of existing rubber-vibration-isolating mounts.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcoming that prior art exists, the utility model aims at providing a three-dimensional seismic isolation device to solve the cooperative control problem of vertical vibration and horizontal vibration of current civil engineering structure under the earthquake effect.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a three-dimensional seismic isolation device comprises a bearing frame, a vertical shock absorption system and a horizontal shock absorption system, wherein:

the bearing frame comprises an upper frame, a lower ring beam and a bottom plate which are sequentially arranged from top to bottom, the upper part of the upper frame is connected with a target shock-insulation object, the vertical shock absorption system is arranged between the upper frame and the lower ring beam, and the horizontal shock absorption system is arranged between the lower ring beam and the bottom plate;

the vertical shock absorption system comprises a plurality of shock insulation springs and a vertical guide device, and the upper end and the lower end of each shock insulation spring respectively support against the upper frame and the lower ring beam; the vertical guide device comprises a plurality of spring sleeves, spring guide rods, linear bearings and linear bearing guide rods, wherein the spring sleeves are fixed at the bottom of the upper frame, are the same as the shock insulation springs in number and are sleeved at the upper parts of the shock insulation springs; the spring guide rod is fixed on the upper surface of the lower ring beam and penetrates through the inside of the shock insulation spring; the linear bearing is fixed on the upper frame, the linear bearing guide rod penetrates through the corresponding shock insulation spring, the lower end of the linear bearing guide rod is fixed on the upper surface of the lower ring beam, and the upper end of the linear bearing guide rod penetrates through the linear bearing fixed on the upper frame;

the horizontal damping system comprises a sliding table base, a spherical crown plate arranged on the sliding table base through a steel ball sliding table bearing, and a sliding table connecting plate arranged above the spherical crown plate, wherein the sliding table base is fixed on a bottom plate of the bearing frame, and the upper end of the sliding table connecting plate is fixedly connected with the bottom of the lower ring beam.

According to a preferred embodiment, the bottom plate is further provided with a plurality of horizontal resetting locking mechanisms for resetting the horizontal damping system, and each horizontal resetting locking mechanism is fixed on the periphery of the bottom plate through a corresponding locking mechanism base.

According to another preferred embodiment, the number of linear bearing guide rods is eight, corresponding to which the number of linear bearings is also eight, evenly distributed adjacent to the outer edge of the upper frame.

According to the utility model discloses, the upper surface of upper ledge still is equipped with a plurality of frame post, and passes through the frame post with target shock insulation connects.

Preferably, the cross section of the frame column is in the shape of a sector ring, and the sector ring is uniformly distributed around the inner circular ring surface of the upper frame.

Furthermore, the frame columns are four in number, and the fan ring of each frame column corresponds to 1/8 of the circular ring surface.

According to a preferred embodiment, a plurality of positioning plates are fixed on the lower ring beam and are uniformly distributed along the outer edge of the lower ring beam, a plurality of reserved hole positions for the linear bearing guide rod, the shock insulation spring and the spring guide rod are formed in the positioning plates, and the bottom of the shock insulation spring, the spring guide rod and part of the linear bearing guide rod are installed in the reserved hole positions.

According to the utility model discloses, the cross-section of bottom plate is the square, the quantity of the slip table base that establishes on the bottom plate is four to position on the bottom plate presents two liang of symmetric distributions.

According to the utility model discloses, the central authorities of slip table base are equipped with the recess, and friction material is installed to the bottom of recess, and the material is inhaled to the protecting against shock then laid to the inside wall of recess, the top of slip table base still is provided with the upper cover plate.

According to the utility model discloses, steel ball slip table bearing comprises the bearing and places the steel ball in the bearing, shelves friction material is last, the ball is covered the board level and is shelved on the steel ball slip table bearing to allow the slip of ball to cover the board along arbitrary horizontal direction in the recess.

The utility model discloses a three-dimensional shock isolation device has following beneficial effect:

1. vertical shock insulation is realized by adopting a spring element, and horizontal shock insulation is realized by adopting a horizontal sliding table system; the system integrally belongs to a passive control device, has no external energy input, has the natural stability characteristic, and is simple in construction technology and high in safety.

2. The shock absorption and isolation are realized by adopting the spring element and the steel ball sliding table bearing element, and the shock absorption and isolation device has the characteristics of simple structure, convenient processing, easy assembly and the like; according to the specific requirements of vertical shock insulation and horizontal shock insulation, all elements of the shock insulation system can be subjected to unified design and batch production; all elements of the shock isolation system can be connected only through bolts, so that the mounting and maintenance difficulty of the shock isolation device is reduced, and the safety is high; through horizontal locking mechanism that resets, can realize the shock insulation device after the earthquake reset, promote the suitability, reliability and the durability of device.

3. The utility model discloses can realize the three-dimensional shock insulation to civil engineering structure. Vertical shock insulation is realized by changing the number and the rigidity of vertical springs; the quantity and rigidity of the shock insulation springs are determined by the structural dynamic characteristics and the preset target control performance. The horizontal shock insulation is realized by changing the friction coefficient of the sliding table base, and the horizontal shock insulation period can be adjusted very conveniently by adjusting the friction coefficient.

Drawings

Fig. 1 is a schematic structural view of a three-dimensional seismic isolation apparatus according to the present invention.

Fig. 2 is a cross-sectional view taken along a-a of fig. 1.

Fig. 3 is a cross-sectional view taken along B-B of fig. 1.

Fig. 4 is a cross-sectional view taken along line C-C of fig. 1.

Fig. 5 is a schematic diagram of the horizontal seismic isolation sliding table of the three-dimensional seismic isolation device of the present invention.

Description of the figure numbers:

1. shock-isolating the target; 2. an upper frame; 3. a bearing guide rod; 4. a spring sleeve; 5. a shock isolation spring;

6. a spring guide rod; 7. a lower ring beam; 8. a spherical crown plate; 9. a steel ball sliding table bearing; 10. a sliding table base;

11. a base plate; 12. a linear bearing; 13. a horizontal reset locking mechanism; 14. a slipway connecting plate;

15. a locking mechanism base; 22. a frame column; 72. reserving hole sites; 73. positioning a plate; 91. steel balls;

92. a steel ball bearing; 101. a friction material; 102. an impact-resistant vibration-absorbing member; 103. and an upper cover plate.

Detailed Description

The three-dimensional seismic isolation device of the present invention will be described in further detail with reference to the accompanying drawings. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.

The utility model discloses a three-dimensional shock isolation device is applied to the civil engineering field, mainly is used for realizing the three-dimensional shock attenuation and isolation of civil engineering structure. In general, the civil engineering structure to be subjected to three-dimensional seismic isolation can be a ground building or an underground structure; meanwhile, the target object to be isolated can also be a precise instrument, equipment needing vibration prevention, a working platform, a control room, a safety room and the like. In the case of civil engineering structures and vibration-sensitive precision instruments, failure to implement appropriate seismic isolation and reduction measures may cause life and property damage to workers and working equipment.

The fixing and/or connecting modes in the above embodiments may generally be welding, bolting, etc. according to design, processing or construction requirements; either directly or indirectly through intermediate switching devices. The specific connection mode given here is only an example, and those skilled in the art can understand the meaning of the above fixing mode in the present invention according to the specific situation.

As shown in fig. 1, the three-dimensional seismic isolation apparatus of the present embodiment includes a bearing frame, a vertical damping system and a horizontal damping system, wherein:

the bearing frame comprises an upper frame 2, a lower ring beam 7 and a bottom plate 11 which are sequentially arranged from top to bottom, wherein the upper part of the upper frame 2 is connected with a target shock-insulation object 1, the vertical shock-absorbing system is arranged between the upper frame 2 and the lower ring beam 7, and the horizontal shock-absorbing system is arranged between the lower ring beam 7 and the bottom plate 11;

the vertical shock absorption system comprises a plurality of shock insulation springs 5 and a vertical guide device, wherein the upper end and the lower end of each shock insulation spring 5 respectively support against the upper frame 2 and the lower ring beam 7; the vertical guide device comprises a plurality of spring sleeves 4, spring guide rods 6, linear bearings 12 and linear bearing guide rods 3, wherein the spring sleeves 4 are fixed at the bottom of the upper frame 2, are the same as the shock insulation springs 5 in number and are sleeved at the upper parts of the shock insulation springs 5; the spring guide rod 6 is fixed on the upper surface of the lower ring beam 7 and penetrates through the corresponding shock insulation spring 5; the linear bearing 12 is fixed on the upper frame 12, the linear bearing guide rod 6 is arranged in the corresponding shock insulation spring 5 in a penetrating way, the lower end of the linear bearing guide rod is fixed on the upper surface of the lower ring beam 7, and the upper end of the linear bearing guide rod penetrates into the linear bearing 12 fixed on the upper frame 2;

the horizontal damping system comprises a sliding table base 10, a spherical crown plate 8 arranged on the sliding table base 10 through a steel ball sliding table bearing 9 and a sliding table connecting plate 14 arranged above the spherical crown plate 8, wherein the sliding table base 10 is fixed on a bottom plate 11 of the bearing frame, and the upper end of the sliding table connecting plate 14 is fixedly connected with the bottom of the lower ring beam 7.

Preferably, the bottom plate 11 is further provided with a plurality of horizontal resetting locking mechanisms 13 for resetting the horizontal damping system; each horizontal reset locking mechanism 13 is fixed around the bottom plate 11 through a corresponding locking mechanism base 15.

The number of the linear bearing guide rods 3 is eight or more, as shown in fig. 2, in this embodiment, the number of the linear bearing guide rods 3 is eight, and correspondingly, the number of the linear bearings 12 is also eight, and the linear bearings are uniformly distributed near the outer edge of the upper frame 2.

Generally, the upper frame 2 is circular in cross-section; in the present embodiment, the cross section of the upper frame 2 may be further optimized to be a torus for saving materials in consideration of the stress characteristics of the upper frame. Further, the upper surface of the upper frame 2 is also provided with a plurality of frame columns 22, and is connected with the target seismic isolator 1 through the frame columns 22. Preferably, the cross section of the frame column 22 is in a fan-ring shape, and is uniformly distributed around the inner circular ring surface of the upper frame 2; in this embodiment, the number of the frame columns 22 is four, and the fan ring of each frame column 22 corresponds to 1/8 of the circular ring surface.

Further, the axis of the shock insulation spring 5 is collinear with the axis of the spring sleeve 4; likewise, the spring guide rod 6 is also collinear with the axis of the isolation spring 5.

As shown in fig. 3, in order to facilitate installation of the linear bearing guide rods 3, the shock-isolating springs 5 and the spring guide rods 6, four positioning plates 73 are further fixed on the lower ring beam 7; the four positioning plates 73 are uniformly distributed along the outer edge of the lower ring beam 7 and are fixedly connected with the lower ring beam 7 through bolts, and a plurality of reserved hole positions 72 for the linear bearing guide rod 3, the shock insulation spring 5 and the spring guide rod 6 are respectively arranged on the positioning plates 73. In this embodiment, the number of the reserved hole sites 72 on each positioning plate 73 is eleven, one of the reserved hole sites is located on the outer side of the middle of the positioning plate 73, and the remaining ten reserved hole sites are uniformly and symmetrically distributed on two sides of the positioning plate 73; as shown in fig. 3, of the eight linear bearing guide rods 3, the lower ends of four linear bearing guide rods 3 are installed in the reserved hole sites 72, and the other four linear bearing guide rods are located between two adjacent positioning plates 73; the number of the spring guide rods 6 is forty, each positioning plate 73 is provided with ten reserved hole sites 72 which are uniformly and symmetrically distributed on two sides corresponding to the positioning plate 73; the number of the shock insulation springs 5 is forty-eight, wherein the lower ends of forty-four of the shock insulation springs are arranged in the reserved hole sites 72, and the lower ends of the other four shock insulation springs are sleeved on the four linear bearing guide rods 3 positioned between the two adjacent positioning plates 73.

Generally, the lower ring beam 7 is circular in cross section; in the present embodiment, in consideration of the stress characteristics of the lower ring beam 7, the cross section of the lower ring beam 7 may be further optimized for saving material. As shown in fig. 3, the center of the lower ring beam 7 is cut to remove a regular polygonal area.

In the embodiment shown in fig. 1, the vertical guiding device (the linear bearing guide rod 3, the spring sleeve 4 and the spring guide rod 6) ensures the stability of the shock-isolating spring 5 in the vertical vibration process, avoids the negative stiffness characteristic introduced by the P-delta effect, and prevents the platform from inclining laterally. In this embodiment, the upper end of the shock-isolating spring 5 is fixedly connected with the bottom of the upper frame 2, and the lower end is fixedly connected with the lower ring beam 7 through the spring sleeve positioning plate 73. When receiving vertical earthquake effect, for guaranteeing perpendicularly to shock mitigation system motion wholeness, promote vertical shock insulation effect, need satisfy following requirement: 1. the arrangement positions of the shock insulation springs 5 are uniformly arranged along the lower ring beam 7, as shown in fig. 3, the whole shock insulation springs are distributed in a polygonal shape and are at least divided into four areas; the arrangement number of each region shock-isolation spring 5 is at least 10, and the position and the number of each region shock-isolation spring 5 are symmetrical about the linear bearing guide rod 3; 2. when the shock insulation spring 5 is in a free state, the upper frame 2 is parallel to the lower ring beam 7, and the upper frame and the lower ring beam are both in a horizontal state; 3. the overall stiffness of the shock insulation springs 5 is designed according to the dynamic characteristics and shock insulation requirements of the target shock insulation structure 1, and the stiffness characteristics of the springs are determined according to the number of the arranged total springs.

In this embodiment, the cross section of the bottom plate 11 for mounting the horizontal damping system is square. When the number of the sliding table bases 10 is less than four, the lower ring beam 7 is easy to turn; in order to prevent the shock insulation system from overturning due to factors such as asymmetric moment, at least 4 sliding table bases 10 are arranged on the bottom plate 11. Preferably, as shown in fig. 4, the positions of the 4 sliding table bases 10 on the bottom plate 11 are distributed symmetrically two by two.

Further, in the sliding table base 10, according to the design requirement of horizontal shock insulation, determining a frequency parameter and a stiffness parameter of a horizontal shock insulation system; as shown in fig. 5, according to the determined horizontal vibration isolation parameters, a friction material 101 is laid at the bottom of the sliding table base 10 for providing a certain friction force, and the friction material 101 is replaceable according to the requirement of horizontal vibration isolation performance; and, along the lateral wall of slip table base 10 has laid protecting against shock and has inhaled material 102, is used for preventing the impact effect that produces when the great horizontal displacement takes place for steel ball slip table bearing 9. Paving the anti-impact shock-absorbing material 102, so that on one hand, the influence of horizontal impact on the horizontal acceleration of a shock-isolating target structure can be prevented; on the other hand, the steel ball sliding table bearing 9 and the sliding table base 10 can be protected, so that the applicability, the durability and the reliability of the shock isolation device are improved.

Further, as shown in fig. 4, the number of the horizontal returning locking mechanisms 13 and the locking mechanism bases 15 provided on the bottom plate 11 is four, and the arrangement positions of the locking mechanism bases 15 are located around the bottom plate 11. When in normal use, the horizontal reset locking mechanism 13 and the base 15 thereof can be removed; when the horizontal damping system is displaced horizontally due to an earthquake or the like, the horizontal resetting locking mechanism 13 and the base 15 thereof can be installed, and the horizontal resetting damping system is pushed to reset according to the position of the horizontal resetting locking mechanism 13.

In the embodiment shown in fig. 1, as shown in fig. 5, the main components of the horizontal damping system are a groove provided in the center of the base 10, a friction material 101 is installed at the bottom of the groove, and a shock-proof and shock-absorbing material 102 is installed on the inner side wall of the groove. The steel ball sliding table bearing 9 consists of a bearing 92 and steel balls 91 arranged in the bearing 92, is placed on the friction material 101, and can slide in any horizontal direction in a groove of the sliding table base 10; the ball crown plate 8 is horizontally placed on the steel ball sliding table bearing 9, and can also slide in any horizontal direction in the groove. In addition, the top of the sliding table base 10 is further provided with an upper cover plate 103, and due to the arrangement of the upper cover plate 103, the influence of factors such as dust falling and rain accumulation on the vibration isolation device during service can be prevented, and the damage to the durability and the reliability of the vibration isolation device due to environmental factors is avoided.

Although the three-dimensional seismic isolation apparatus of the present invention has been described in detail with reference to the specific embodiments, it should be understood by those skilled in the art that the present invention is not limited to the specific embodiments, and similar modifications based on the basic principles and concepts of the present invention are also within the scope of the present invention.

Claims

1. A three-dimensional seismic isolation apparatus, comprising a carrying frame, a vertical shock absorbing system and a horizontal shock absorbing system, wherein:

the bearing frame comprises an upper frame (2), a lower ring beam (7) and a bottom plate (11) which are sequentially arranged from top to bottom, the upper part of the upper frame (2) is connected with a target shock-insulation object (1), the vertical shock absorption system is arranged between the upper frame (2) and the lower ring beam (7), and the horizontal shock absorption system is arranged between the lower ring beam (7) and the bottom plate (11);

the vertical shock absorption system comprises a plurality of shock insulation springs (5) and a vertical guide device, wherein the upper end and the lower end of each shock insulation spring (5) respectively support against the upper frame (2) and the lower ring beam (7); the vertical guide device comprises a plurality of spring sleeves (4), spring guide rods (6), linear bearings (12) and linear bearing guide rods (3), wherein the spring sleeves (4) are fixed at the bottom of the upper frame (2), are the same as the shock insulation springs (5) in number and are sleeved at the upper parts of the shock insulation springs (5); the spring guide rod (6) is fixed on the upper surface of the lower ring beam (7) and penetrates through the inside of the shock insulation spring (5); the linear bearing (12) is fixed on the upper frame (2), the linear bearing guide rod (3) penetrates through the corresponding shock insulation spring (5), the lower end of the linear bearing guide rod is fixed on the upper surface of the lower ring beam (7), and the upper end of the linear bearing guide rod penetrates into the linear bearing (12) fixed on the upper frame (2);

the horizontal damping system comprises a sliding table base (10), a spherical crown plate (8) arranged on the sliding table base (10) through a steel ball sliding table bearing (9) and a sliding table connecting plate (14) arranged above the spherical crown plate (8), the sliding table base (10) is fixed on a bottom plate (11) of the bearing frame, and the upper end of the sliding table connecting plate (14) is fixedly connected with the bottom of the lower ring beam (7).

2. The three-dimensional seismic isolation device according to claim 1, wherein a plurality of horizontal resetting locking mechanisms (13) are further arranged on the bottom plate (11) and used for resetting the horizontal damping system, and each horizontal resetting locking mechanism (13) is fixed on the periphery of the bottom plate (11) through a corresponding locking mechanism base (15).

3. Three-dimensional seismic isolation device according to claim 1, characterized in that the number of linear bearing guides (3) is eight, corresponding to which the number of linear bearings (12) is also eight, evenly distributed adjacent to the outer edge of the upper frame (2).

4. The three-dimensional seismic isolation device according to claim 1, wherein the upper surface of the upper frame (2) is further provided with a plurality of frame columns (22), and is connected with the target seismic isolation object (1) through the frame columns (22).

5. Three-dimensional seismic isolation device according to claim 4, wherein the frame columns (22) are sector-ring shaped in cross section and evenly distributed around the inner circular ring surface of the upper frame (2).

6. Three-dimensional seismic isolation device according to claim 5, wherein the frame columns (22) are four in number, and the fan ring of each frame column (22) corresponds to 1/8 of the circular ring surface.

7. The three-dimensional vibration isolation device according to claim 1, wherein a plurality of positioning plates (73) are fixed on the lower ring beam (7) and evenly distributed along the outer edge of the lower ring beam (7), a plurality of reserved hole sites (72) for the linear bearing guide rod (3), the vibration isolation spring (5) and the spring guide rod (6) are formed in the positioning plates (73), and the bottoms of the vibration isolation spring (5), the spring guide rod (6) and part of the linear bearing guide rod (3) are installed in the reserved hole sites (72).

8. The three-dimensional vibration isolation device according to claim 1, wherein the cross section of the bottom plate (11) is square, the number of the sliding table bases (10) arranged on the bottom plate (11) is four, and the positions on the bottom plate (11) are distributed symmetrically in pairs.

9. The three-dimensional vibration isolation device according to claim 1, wherein a groove is formed in the center of the sliding table base (10), a friction material (101) is installed at the bottom of the groove and used for providing a certain friction force, an impact-resistant vibration-absorbing material (102) is arranged on the inner side wall of the groove, and an upper cover plate (103) is further arranged at the top of the sliding table base (10).

10. Three-dimensional seismic isolation device according to claim 9, characterized in that the steel ball ramp bearing (9) consists of a bearing (92) and steel balls (91) placed in the bearing (92), resting on the friction material (101), the ball crown plate (8) resting horizontally on the steel ball ramp bearing (9) to allow sliding of the ball crown plate (8) in any horizontal direction in the groove.