CN104643741B - A kind of suspension type is floating to put thing three-dimensional isolation device - Google Patents

Abstract

The invention discloses a three-dimensional seismic isolation device for suspended floating objects, which comprises a display stand (1), a support frame (2), a fixed pulley (3), a lateral limit support (4), a rope (5), Torsion spring (7). The present invention suspends the display stand by wire ropes to isolate the horizontal earthquake action, and isolates the vertical earthquake action by combining torsion springs and pulleys. The lateral limit support limits the swing of the display stand under normal conditions due to some external disturbances. When the earthquake comes, The lateral restraint supports fail, and the shock-isolating components work.

Description

A three-dimensional seismic isolation device for suspended floating objects

technical field

The invention relates to a shock-absorbing (vibration) shock-isolation (vibration) device for cultural relics, in particular to a three-dimensional shock-isolation device for suspended floating objects.

Background technique

Cultural relics are relics and relics left by human beings in the process of historical development, and are precious historical and cultural heritage of human beings. Its important historical and artistic value makes the protection of cultural relics an important topic.

At 2:28 pm on May 12, 2008, a magnitude 8.0 earthquake occurred in Wenchuan County, Aba Prefecture, Sichuan Province. Extensive destruction of cultural relics. In Sichuan Province alone, 3,169 movable cultural relics (including 16 first-class cultural relics) in 216 cultural relic collection units were damaged. Among them, the cultural relics warehouse of the Qiang Nationality Museum in Beichuan County collapsed, and 805 Red Army cultural relics and Qiang folk cultural relics were all buried. Under the ruins, an immeasurable loss of value was caused.

At 8:02 on April 20, 2013, an earthquake of magnitude 7.0 occurred in Lushan County, Ya'an City, Sichuan Province. A total of 21 counties (cities, districts) in 6 cities (states) of Ya'an, Chengdu, Liangshan, Leshan, Ganzi, and Meishan 266 immovable cultural relics were damaged, including 24 national key cultural relics protection units, 78 provincial-level cultural relics protection units, 157 city and county-level cultural relics protection units, and 7 cultural relic sites. In addition, the earthquake also caused damage to 349 pieces (sets) of movable cultural relics.

Therefore, it is necessary to take protection measures for the existing cultural relics to avoid damage in the earthquake and protect our country's cultural heritage.

Some traditional anti-seismic measures include the method of lowering the center of gravity, the fixed placement method (using methods such as sticking, absorbing, binding, clamping, and supporting to fix the floating cultural relics as much as possible), the sliding displacement method (leaving enough space around the object, Use sliding and displacement to offset the vibration acceleration of the earthquake to achieve the purpose of earthquake resistance), shock absorption and isolation method (using shock-absorbing and shock-absorbing buffer materials to reduce the vibration effect of cultural relics during earthquakes), etc. Although the traditional anti-seismic method can reduce the damage to the cultural relics caused by the earthquake to a certain extent, there are still some problems:

1) Application limitations. For example, although the method of lowering the center of gravity lowers the center of gravity of the cultural relic, it is still in a floating state, and will still slip and fall under the action of an earthquake, and this method will affect the viewing effect of the cultural relic. Another example is the fixed placement method. This method may cause damage to the cultural relics due to the chemical substances in the latex due to the different types of fixing methods, and it is not easy to remove after fixing.

2) Measures are one-sided. Traditional anti-earthquake measures often do not consider the multi-dimensionality of earthquakes and the complexity of cultural relics damage, and the measures to protect cultural relics are sometimes somewhat one-sided.

3) Misconceptions. On the one hand, it confuses traditional anti-earthquake measures with temporary protection measures, and on the other hand, it ignores the earthquake damage of display cabinets (tables).

4) Standard ambiguity. The specific requirements for anti-earthquake measures for anti-earthquake targets are vague and are mainly judged by experience.

At present, modern seismic isolation technology has achieved remarkable results in the field of floating objects and has been widely used in engineering practice. But most of these seismic isolation devices only consider horizontal seismic action or vertical seismic action one-sidedly, and some devices are expensive and complicated to assemble, which is not conducive to popularization.

To sum up, it is of great theoretical significance and practical application value to develop a three-dimensional seismic (vibration) isolation device for floating objects that can isolate horizontal and vertical seismic actions and is inexpensive and easy to assemble.

Contents of the invention

Aiming at the problem of three-dimensional vibration isolation (vibration) that cannot be effectively solved in the prior art, the present invention provides a suspended three-dimensional vibration isolation device for floating objects with a compact structure and the effect of horizontal and vertical vibration isolation (vibration); the three-dimensional The shock-isolation (vibration) device has good shock-isolation capability in both horizontal and vertical directions, taking into account the operation of the device when there is no earthquake, and has the advantages of simple assembly, low cost and easy maintenance.

In order to achieve the above object, the technical scheme adopted in the present invention is:

The three-dimensional seismic isolation device for suspended floating objects of the present invention includes a display stand, a support frame, fixed pulleys, lateral limit supports, ropes, and torsion springs; the support frame includes a frame and a plurality of support columns, and the upper end of the support column Connected with the frame; a fixed pulley is arranged on the upper end of the support column; a torsion spring providing initial torsion is arranged on the fixed pulley; the display stand is connected with the fixed pulley through the rope in the vertical direction , so that the display stand is horizontally suspended inside the support frame; one end of the lateral limit support for providing horizontal support for the display stand is movably connected to the lower end of the support column, and the other end of the lateral limit support is connected to the display stand Weak link.

The weak connection between the lateral limiting support and the display platform is: the connection strength between the lateral limiting support and the display platform is lower than the strength of the connection just breaking under the design earthquake action, and higher than the strength of the connection breaking under the environmental disturbance without earthquake action.

The lateral limiting support is connected to the supporting frame by a hinge, and the lateral limiting support can freely rotate around the hinge.

The number of support columns can be set to 2, 3, 4 or more according to actual needs.

The weak connection is bonding or welding.

The rope can be a steel wire rope, and the supporting frame is set on a working plane during use.

The torsion spring is combined with the pulley to limit the rotation of the pulley and control the expansion and contraction of the rope, so that the device has an adjustable stiffness in the vertical direction and meets the vertical vibration isolation condition. The production of the torsion spring is designed according to the actual structure and the seismic isolation requirements, and the appropriate restoring force characteristics are selected to achieve the best effect.

The connection between the lateral restraining support and the display stand adopts a weaker connection to ensure that the weak connection breaks under the design earthquake, the lateral restraint fails, and the natural rotation around the hinge point falls, without disturbing the normal operation of the device.

Apply damping material on the pulley and the rope to enhance energy dissipation capacity.

Compared with prior art, the beneficial effect of the present invention is:

1) The three-dimensional shock isolation device of the present invention plays a three-dimensional shock isolation function through the pulley structure and the torsion spring. When there is no earthquake, in order to avoid the swing of the display stand due to the disturbance of the surrounding environment, lateral limit supports are set to ensure that the display stand is in a stable state. When the earthquake came, the seismic action reached the design level, the connection between the lateral limit support and the display stand broke, and the seismic isolation structure began to play a role; under the vertical earthquake, due to the combination of the torsion spring and the pulley, the vertical stiffness of the structure was changed, and the display The vertical relative displacement of the platform can play the role of vertical shock isolation. Under the action of horizontal earthquake, the display stand swings under the traction of the steel wire rope, which plays the role of horizontal shock isolation.

2) The present invention has the advantages of compact structure, simple assembly, low cost and easy maintenance.

3) At present, most of the domestic methods are aimed at horizontal vibration isolation or vertical vibration isolation, but the present invention adopts the method of hanging horizontal vibration isolation and using the combination of torsion spring and pulley to vertical vibration isolation. The structure is novel and can be to the effect of three-dimensional isolation.

Description of drawings:

Fig. 1 is a schematic diagram of the overall structure of a three-dimensional shock-isolating device for suspended floating objects of the present invention;

Fig. 2 is a top view of the suspended three-dimensional shock isolation device for floating objects of the present invention;

Fig. 3 is the elevational view of the three-dimensional seismic isolation device of the suspended floating object of the present invention;

Fig. 4 is a schematic diagram of the structure of a single pulley of the present invention.

Among the figure: 1, display stand, 2, support frame, 3, fixed pulley, 4, lateral limit support, 5, steel wire rope, 6, working plane, 7, torsion spring.

detailed description:

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 4, the three-dimensional shock isolation (vibration) device for suspended floating objects of the present invention includes a display stand 1, a support frame 2, a fixed pulley 3, a lateral limit support 4, a steel wire rope 5, a working plane 6, a torsion Spring 7.

The support frame 2 is fixed on the working plane 6, the support frame 2 includes a frame and a plurality of support columns, and the present embodiment adopts a structure of 4 support columns; a fixed pulley 3 is arranged on the upper end of the support columns; 3 is provided with a torsion spring 7; the steel wire rope 5 is wound on the fixed pulley 3, and pulls the display stand 1 in the vertical direction, so that the display stand 1 is horizontally suspended inside the support frame 2. The torsion spring 7 is combined with the fixed pulley to control the expansion and contraction of the wire rope 5. One end of the lateral limiting support 4 used to provide horizontal support for the display stand 1 is hingedly connected to the column, and the other end is weakly connected to the display stand 1 .

The weak connection between the lateral limiting support and the display platform is: the connection strength between the lateral limiting support and the display platform is lower than the strength of the connection just breaking under the design earthquake action, and higher than the strength of the connection breaking under the environmental disturbance without earthquake action.

When there is no earthquake, in order to avoid the swing of the display stand 1 due to the disturbance of the surrounding environment, a lateral limit support 4 is provided to ensure that the display stand 1 is in a stable state. When the earthquake comes, the seismic action reaches the design level, the connection between the lateral limiting support 4 and the display stand 1 breaks, the lateral limiting support 4 rotates and falls around the hinge connected to the column, and the seismic isolation structure begins to play a role. Under the vertical earthquake, due to the combination of the torsion spring 7 and the pulley 3, the vertical stiffness of the structure is changed, and the display stand 1 produces a vertical relative displacement, which can play the role of vertical shock isolation. Under the action of a horizontal earthquake, the display stand 1 swings under the traction of the steel wire rope 5, which plays the role of horizontal shock isolation.

The suspension height of the display stand and the stiffness of the torsion spring shall be selected according to the isolation requirements and the specific isolation objects. The weak connection between the lateral limit support and the display stand shall be guaranteed to fail under the design earthquake, so that the device can achieve the effect of shock isolation.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (3)

1. a kind of suspension type is floating to put thing three-dimensional isolation device, it is characterised in that the device includes show stand（1）, support frame （2）, fixed pulley（3）, laterally limiting support（4）, rope（5）, torsion spring（7）；The support frame（2）Including a framework and multiple Dagger, the upper end of the support column is connected with the framework；The upper end of the support column is provided with fixed pulley（3）；Described Fixed pulley（3）It is upper that the torsion spring for being provided with initial torsion is set（7）；The show stand（1）Pass through the rope in vertical direction（5）With The fixed pulley（3）Connection, makes the show stand（1）Horizontally suspend in the support frame（2）It is internal；For providing show stand （1）The laterally limiting support of horizontal support（4）One end is flexibly connected with the support column lower end, the laterally limiting support （4）The other end and show stand（1）Weak link.

2. the suspension type according to claim 1, which is floated, puts thing three-dimensional isolation device, it is characterised in that the laterally limiting branch Support（4）With the support frame（2）Using hinge connection, the laterally limiting support（4）Can freely it be rotated around the hinge.

3. suspension type is floating according to claim 1 puts thing three-dimensional isolation device, it is characterised in that the Weak link for bonding or Person welds.