CN104389353B - Integral ball vertical vibration isolation tube - Google Patents
Integral ball vertical vibration isolation tube Download PDFInfo
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- CN104389353B CN104389353B CN201410629651.7A CN201410629651A CN104389353B CN 104389353 B CN104389353 B CN 104389353B CN 201410629651 A CN201410629651 A CN 201410629651A CN 104389353 B CN104389353 B CN 104389353B
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- 239000010959 steel Substances 0.000 claims description 3
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an integral ball vertical vibration isolation tube, which comprises a lower tube, a ball integrating body, a separation plate and an upper guide tube, wherein one end of the lower tube is sealed, one end of the lower tube is open, the ball integrating body is formed by at least one independent ball body, one end of the upper guide tube is sealed, one end of the upper guide tube is open, the ball integrating body is arranged in the tube body of the lower tube, the separation plate is directly and flatly placed on the top of the integrating ball body, and the upper guide tube is arranged in the lower tube in a sleeving way. The vibration isolation tube can be singly used for vertical vibration isolation, and can also be combined with the existing horizontal vibration absorption device for forming a three-dimension vibration isolation composite support seat. The vibration isolation tube has the advantages that the vibration isolation performance is good, in addition, the structure is simple, the durability is good, the manufacturing price is low, certain turnover-resistant capability is realized, the integral ball vertical vibration isolation tube is particularly applicable to buildings sensitive to vertical vibration isolation, such as nuclear power stations, lifeline engineering, high-rise buildings, large-span buildings and long-cantilever buildings, and the integral ball vertical vibration isolation tube is applicable to engineering structures requiring vertical environment vibration isolation.
Description
Technical field
The invention belongs to Structural Engineering and earthquake engineering field are and in particular to a kind of tie for building structure or other engineering
Structure mitigates the new-type vertical earthquake isolating shock mount of Vertical Earthquake Loads or vertical ambient vibration, particularly to one kind by gathering ball
The vertical earthquake isolating bearing combining with cylinder.
Background technology
Either test or true earthquake test, are all shown than traditional antidetonation knot using the engineering structure of seismic isolation technology
The significantly superior anti-seismic performance of structure, the seismic isolation technology being therefore leading with laminated rubber damping bearing obtains in recent decades
Develop rapidly.Shock isolating pedestal is the earthquake isolating equipment being located between building and basis, now widely used various shock isolating pedestals
It is all with the horizontal component isolating seismic wave as main purpose.However, ground motion is the group of complicated three-dimensional motion during earthquake
Close, ground acceleration existing horizontal motion component, also have the component motion of vertical direction.Traditional view is thought, flatly
Brisance destroys to structure and plays a decisive role, and Vertical Earthquake Loads are insignificant.But research shows, Vertical Earthquake Loads are to structure
The impact of collapse state and destructiveness can not be ignored, such as in rock hand city wall inland earthquake in 2008, in KiK net
One Northwest observation station recorded the strongly vertical acceleration close to 4000gal, additionally once repeatedly surveyed the vertical of earthquake and adds
Velocity peak values are more than horizontal acceleration peak value.Earthquake cannot be efficiently reduced in the existing shock isolating pedestal in earthquake centre in multiple times vertically to divide
The impact to building structure for the amount is it is impossible to realize vertical earthquake isolating or three-dimensional isolation.Therefore both at home and abroad many scholars to horizontal seismic isolation
Bearing is transformed, and strides forward to three-dimensional isolation from two-dimentional shock insulation.In recent years, many novel three-dimensional shock isolating pedestal schemes are had in succession
It is suggested, great majority are all combined with horizontal seismic isolation bearing by vertical earthquake isolating bearing, but there is following shortcoming：
1st, the damping that bearing is provided can not meet the requirement of vertical earthquake isolating, and the power consumption of vertical motion is only limitted between steel
Phase mutual friction, the such as bearing of disk spring composition.
2nd, adopt the building structure of some vertical earthquake isolating equipments under geological process, it vertically reacts and non-isolation structure phase
It is exaggerated than on the contrary, such as thicken the laminated rubber damping bearing of rubber layer.
3rd, involve great expense, requirement on machining accuracy is high, maintenance cost is high, easy generation under geological process is waved, such as air
Spring fastening.
4th, poor durability, maintenance cost height are the common faults of most vertical earthquake isolating bearing or three-dimensional isolation device at present,
Therefore, it is difficult to being widely used in engineering structure.
Content of the invention
It is an object of the invention to provide one kind possesses higher vertical bearing capacity, meets normal usage function requirement, and
Vertical vibrations, the bearing set ball vertical earthquake isolating cylinder of consumption Vertical Vibration Energy can be effectively isolated in earthquake.Should
Bearing both can use separately as vertical earthquake isolating, can combine with existing horizontal seismic isolation bearing again, forms three-dimensional isolation
Compound support.Not only isolation property is good for this bearing, and simple structure, good endurance, cheap, have certain antidumping
Ability, is particularly well-suited to nuclear power station, lifeline engineering, towering high level, large span, long cantilever etc. and vertical earthquake isolating sensitivity is built
Build.
In order to reach object above, the present invention takes following solution：
A kind of set ball vertical earthquake isolating cylinder of the present invention, it includes, and the lower cylinder of one end open is closed in one end, at least one is only
The upper guide composition of one end open is closed in ball aggregate, dividing plate and one end that vertical spheroid is constituted, and described ball aggregate is contained in down
In the cylinder of cylinder, described dividing plate directly lies in the top of ball aggregate；Described upper guide is inserted in lower cylinder.
It also includes damping obturator, and described damping obturator is full of in the space of ball aggregate.Described damping obturator
Can be damping oil and/or damping grease, different viscositys can be selected according to the size of required damping.Described damping oil, damping
Fat can be single multiple viscosity or various difference viscosity combination.
Small through hole is had on described dividing plate.
Described upper guide fixed sleeves set the outer sleeve that one end open is closed in an one end, and described outer sleeve is same with upper guide
Axle, the height of outer sleeve is more than the height of upper guide but is less than the height of lower cylinder, and the internal diameter of outer sleeve is more than the external diameter of lower cylinder.
The cylinder inner bottom part fixation of described upper guide is arranged with least one inner sleeve coaxial with upper guide, the height of inner sleeve
Degree is identical with the height of upper guide；Described lower cylinder is nested in the gap between guide and outer sleeve, upper guide and inner sleeve
Frame is on dividing plate.To realize carrying out the spacing of horizontal direction to this shock insulation cylinder, prevent shock insulation cylinder from occurring in earthquake laterally to topple,
Ensure the resistance to capsizing of shock insulation cylinder.
The height of described upper guide, outer sleeve, inner sleeve and lower cylinder also should meet the needs of vertical displacement, so that building is tied
Structure vertically can do upward-downward translation in earthquake, and ensures under rarely occurred earthquake acts on, the outer sleeve not installed surface with lower cylinder
Contact, lower cylinder is not contacted with the installed surface of upper guide.When inner sleeve is more than one, wherein the external diameter of innermost layer inner sleeve is institute
State dividing plate diameter 1/3, upper guide external diameter is slightly less than the internal diameter of lower cylinder, and identical with the height of each layer inner sleeve；Outer sleeve
Height be more than the height of inner sleeve but the height less than lower cylinder, the internal diameter of outer sleeve is more than the external diameter of lower cylinder.Upper guide, overcoat
The diameter of cylinder, inner sleeve and lower cylinder and height, depending on the volume of the stroke between upper guide, lower cylinder and ball aggregate.
Described lower cylinder extends out to an installed surface vertical with cylinder axis, described peace respectively with the blind end of outer sleeve
Dress has installing hole on face, to be connected with the superstructure of building.
Described ball set spheroid is made up of at least one independent solid and/or hollow ball；The material of described ball is super
Elasticity or viscoelastic material, such as：Natural rubber, synthetic rubber, high-damping rubber, the rubber mixing high-intensity fiber, silica gel etc., or
Person is composited by aforementioned at least two layers of material；Intensity and the deformation modulus of material can be adjusted according to actual needs；Ball
Diameter determined according to design requirement, can be joined using multiple different diameter group stageds it is also possible to whole ball adopt identical
Diameter.The quantity of ball determines according to design requirement.
Described damping obturator is damping oil and/or damping grease；Described lower cylinder, dividing plate, upper guide, outer sleeve, inner sleeve
And installed surface, material therefor is all steel, high-strength alloy, high strength RC, or the combination of aforementioned at least two materials.
Its size will determine according to requirements.In order to improve durability, if material has the possibility of corrosion, need to do antirust place
Reason.
Described lower cylinder, upper guide, outer sleeve, inner sleeve are cylinder, and described dividing plate is circle, and dividing plate diameter is slightly less than
The internal diameter of lower cylinder.
In order to improve durability, described set ball shock insulation cylinder also includes rubber sheath, and described rubber sheath covers on shock insulation cylinder
Outward, its two ends is separately fixed on installed surface；The height that the total length of described rubber sheath is more than set ball shock insulation cylinder adds set
Ball shock insulation cylinder maximum displacement stroke sum, with diameter greater than lower cylinder external diameter, thickness is 5～10mm.
The number of assembling steps of this set ball shock insulation cylinder is：1. the openend of lower cylinder is placed upward；2. ball is all put into down
Form ball aggregate in cylinder, make the surface of ball aggregate in cylinder substantially smooth；3. injection damping oil or damping grease in lower cylinder；④
Put into dividing plate above ball aggregate；5. the openend of upper guide down, it is enclosed within the top of lower cylinder, upper guide and inner sleeve
It is pressed in above dividing plate.It is completed.It can be seen that set ball shock insulation cylinder assemble method is very simple.
The set using method when being only used for vertical earthquake isolating for the ball shock insulation cylinder of the present invention：The installed surface of upper guide with build
The bottom building thing superstructure is connected by bolt, and the lower installed surface of cylinder is connected by bolt with the basis of building.
The set ball shock insulation cylinder of the present invention is used for using method during three-dimensional isolation：Installed surface and building upper guide
The bottom of superstructure is passed through bolt and is connected, and the installed surface of lower cylinder is connected by bolt with the upper junction plate of horizontal seismic isolation bearing,
The lower connecting plate of horizontal seismic isolation bearing is connected by bolt with the basis of building.
The present invention set operation principle under normal operating condition for the ball vertical earthquake isolating cylinder be：The load of superstructure leads to
Cross guide and inner sleeve is delivered to dividing plate, dividing plate is delivered evenly to ball aggregate (because ball aggregate is subject to down load
The constraint of cylinder, so each ball is in three dimension stress state), ball aggregate is delivered to load by lower cylinder following again
On the basis of horizontal seismic isolation bearing or building.When there is no earthquake or only occurred level earthquake, gather ball vertical earthquake isolating cylinder
Only play the effect of transmission superstructure load.
The present invention set the operation principle when vertical seismic action occurs for the ball vertical earthquake isolating cylinder be：There is vertical shake on ground
When dynamic, upper guide and inner sleeve will do motion up and down reciprocatingly with respect to lower cylinder.When upper guide and inner sleeve are with respect to lower cylinder
When doing motion upwards, there is no any constraint, so that superstructure can be freely up moved, release and vertically shake the knot causing
Structure pulling force, the pressure that at this moment ball aggregate is subject to can reduce, and spheroid occurs certain resilience, dividing plate up move certain away from
Pass through small through hole on gap and dividing plate between dividing plate and lower cylinder from, damping oil or damping grease toward dirty；When upper guide and interior
When sleeve pipe moves downward with respect to lower cylinder, ball aggregate is produced with impact and extrudes, so that the space between spheroid is compressed, its
In damping oil or damping grease be extruded and pass through small through hole on gap and dividing plate between dividing plate and lower cylinder toward upper, spheroid
Between the extrusion of the friction that produces and damping oil or damping grease increased the damping of system motion, simultaneously the kinetic energy of taphrogeny
Change into heat energy and consume, so that the vertical vibrations of superstructure is decayed rapidly.
The advantage of the technical scheme that the present invention provides：
1) using by three-dimensional constraint and be immersed in damping oil or damping grease etc. damp obturator in being made up of self-contained spheres
Ball aggregate as vertical earthquake isolating bearing core, spheroid be in three dimension stress state all the time in lower cylinder it is ensured that set
Ball vertical earthquake isolating cylinder can provide very high vertical bearing capacity.
2) can be joined by the diameter of the deformation modulus of ball material and spheroid, level adjust with quantity set ball vertical
The vertical rigidity of shock insulation cylinder, can easily meet different vertical rigidity demands.
3) stable performance, good endurance, structure are simple, cheap, install and change all very simple.
4) in a word, the present invention have wide applicability it is adaptable to the engineering structure such as house, bridge, nuclear power station vertical every
Shake and damping, are also applied for the vibration and noise reducing of underground railway track.
Brief description
Fig. 1 is the structural representation of lower cylinder；
Fig. 2 is the A A profile of Fig. 1；
Fig. 3 is the sectional view of dividing plate；
Fig. 4 is diaphragm structure schematic diagram；
Fig. 5 is the structural representation of upper guide；
Fig. 6 is the upward view of upper guide；
Fig. 7 is the assembling schematic diagram of set ball vertical earthquake isolating cylinder；
Fig. 8 is the sectional view of set ball vertical earthquake isolating cylinder；
Fig. 9 is set ball vertical earthquake isolating cylinder as scheme of installation during three-dimensional isolation device；
Figure 10 is set ball vertical earthquake isolating cylinder as scheme of installation during vertical earthquake isolating equipment.
Specific embodiment
The present invention is further illustrated with specific embodiment below in conjunction with the accompanying drawings.
It is a kind of one of preferred embodiment of set ball vertical earthquake isolating cylinder of the present invention as shown in Fig. 1～10.
It includes one end and closes the ball set that under the cylinder of one end open, cylinder 1, multiple independent elastic sphere 31 are constituted
Body 3, diameter be slightly less than lower cylinder internal diameter circular bulkheads 4, damping obturator 5, one end close one end open cylinder on guide 2
Form with rubber sheath 6, described upper guide 2 fixed sleeves set the circular cylindrical outer sleeve 21 that one end open is closed in an one end, institute
State outer sleeve 21 coaxial with upper guide 2, the height of outer sleeve 21 is more than the height of upper guide 2, less than the height of lower cylinder 1；Described
The cylinder inner bottom part fixation of upper guide 2 is arranged with a cylindrical inner sleeve 22 coaxial with upper guide 2, the height of inner sleeve 22 and
The height of upper guide 2 is identical；Described ball aggregate 3 is contained in the cylinder of lower cylinder 1, and described dividing plate 4 directly lies in ball set
The top of body 3；Described lower cylinder 1 is nested in the gap between guide 2 and outer sleeve 21, and upper guide 2 and inner sleeve 22 frame exist
On dividing plate 4；Multiple small through hole 41 are uniformly had on described dividing plate 4, described damping obturator 5 is full of in the space of ball aggregate 3.
Described damping obturator 5 is damping oil or damping grease it is possible to select different viscositys according to the size of required damping.Described resistance
Buddhist nun's oil, damping grease can be single multiple viscosity or various difference viscosity combination；Described lower cylinder 1 and outer sleeve 21
Blind end extend out to an installed surface 11,23 vertical with cylinder axis respectively, described installed surface has installing hole, with
Just it is connected with building and horizontal seismic isolation bearing；Outside shock insulation cylinder, its two ends is separately fixed at installed surface to described rubber sheath cover 6
11st, on 23；The dominant bit that the total length of described rubber sheath 6 adds set ball shock insulation cylinder more than the height of set ball shock insulation cylinder is divided a word with a hyphen at the end of a line
Journey sum, with diameter greater than lower cylinder 1 external diameter, thickness is 5～10mm.
Described upper guide 2, the height of outer sleeve 21, inner sleeve 22 and lower cylinder 1 also should meet the needs of vertical displacement, make
Building structure vertically can do upward-downward translation in earthquake, and ensure rarely occurred earthquake act under, outer sleeve 21 not with lower cylinder 1
Installed surface 11 contact, lower cylinder 1 is not contacted with the installed surface 23 of upper guide 2.When inner sleeve is more than one, wherein in innermost layer
The external diameter of sleeve pipe is the 1/3 of the diameter of described dividing plate 4, and upper guide 2 external diameter is slightly less than the internal diameter of lower cylinder 1, and with each layer inner sleeve
22 height is identical；The height of outer sleeve 21 is more than the height of inner sleeve 22, but the height less than lower cylinder 1.Outer sleeve 21 interior
Footpath is more than the external diameter of lower cylinder 1.Upper guide 2, the diameter of outer sleeve 21, inner sleeve 22 and lower cylinder 1 and height, depending on upper guide 2
Maximum displacement stroke and lower cylinder 1 between and the volume of ball aggregate 3.
The material of described spheroid 31 can be natural rubber, synthetic rubber, high-damping rubber, the rubber of incorporation high-intensity fiber
The super-elasticity such as glue, silica gel or viscoelastic material, or be composited by aforementioned at least two layers of material；Can be according to actual needs
To adjust intensity and the deformation modulus of material；The diameter of spheroid 31 determines according to design requirement, can adopt multiple different
Diameter group staged is joined it is also possible to whole spheroid adopts same diameter.The quantity of ball determines according to design requirement.
Described lower cylinder 1, dividing plate 4, upper guide 2, outer sleeve 21, inner sleeve 22 and installed surface 11,23, material therefor is all permissible
It is steel, high-strength alloy, high strength RC, or the combination of aforementioned at least two materials, its size will be according to using will
Ask to determine.In order to improve durability, if material has the possibility of corrosion, need to do antirust treatment.
In order to improve durability, described set ball shock insulation cylinder also includes rubber sheath 6, and described rubber sheath cover 6 is in shock insulation
Cylinder is outer, and its two ends is separately fixed on installed surface 11,23；The total length of described rubber sheath 6 is more than the height of set ball shock insulation cylinder
Degree plus maximum displacement stroke sum, with diameter greater than lower cylinder 1 external diameter, thickness is 5～10mm.
The number of assembling steps of this set ball shock insulation cylinder is：1. the openend of lower cylinder 1 is placed upward；2. self-contained spheres 31 are put
Enter in lower cylinder 1, make the surface of ball aggregate 3 in cylinder substantially smooth；3. injection damping oil or damping grease in lower cylinder 1；4. in ball
Dividing plate 4 is put into above aggregate 3；5. the openend of upper guide 2 down, it is inserted in the top of lower cylinder 1, upper guide 2 and inner sleeve
Pipe 22 is pressed in above dividing plate 4, is completed.
The present invention is not limited to embodiment of above, as long as the scheme described in this specification or claims is all
Can implement.Such as small through hole on above-described embodiment median septum, inner sleeve, damping obturator etc. are that optionally to have
Or do not have；Spheroid can also be elasticity or viscoelastic.Therefore embodiment described above only have expressed the preferred of the present invention
Embodiment, its description is more concrete and detailed, but therefore can not be interpreted as the restriction to scope of patent protection of the present invention.
It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also do
Go out some deformation and improve, these broadly fall into protection scope of the present invention.
Claims (10)
1. a kind of set ball vertical earthquake isolating cylinder it is characterised in that：It includes, and the lower cylinder of one end open is closed in one end, at least one is only
The upper guide composition of one end open is closed in ball aggregate, dividing plate and one end that vertical spheroid is constituted, and described ball aggregate is contained in down
In the cylinder of cylinder, described dividing plate directly lies in the top of set spheroid；Described upper guide is inserted in lower cylinder.
2. a kind of set ball vertical earthquake isolating cylinder according to claim 1 it is characterised in that：It also includes damping obturator,
Described damping obturator is full of in the space of ball aggregate.
3. a kind of set ball vertical earthquake isolating cylinder according to claim 2 it is characterised in that：Have little logical on described dividing plate
Hole.
4. the set ball vertical earthquake isolating cylinder according to claim 1 or 2 or 3 it is characterised in that：Described upper guide fixed sleeves
If the outer sleeve of one end open is closed in an one end, described outer sleeve is coaxial with upper guide, and the height of outer sleeve is more than upper guide
Height, less than the height of lower cylinder.
5. according to claim 4 set ball vertical earthquake isolating cylinder it is characterised in that：The cylinder inner bottom part of described upper guide is fixed
It is arranged with least one inner sleeve coaxial with upper guide, the height of inner sleeve is identical with the height of upper guide；Described lower cylinder is embedding
It is inserted in the gap between guide and outer sleeve, upper guide and inner sleeve pipe support are on dividing plate.
6. according to claim 5 set ball vertical earthquake isolating cylinder it is characterised in that：When inner sleeve is more than one, wherein
The external diameter of innermost layer inner sleeve is the 1/3 of the diameter of described dividing plate, and upper guide external diameter is slightly less than the internal diameter of lower cylinder, and with each layer in
The height of sleeve pipe is identical；The height of outer sleeve is more than the height of inner sleeve but is less than the height of lower cylinder, and the internal diameter of outer sleeve is more than
The external diameter of lower cylinder.
7. according to claim 5 set ball vertical earthquake isolating cylinder it is characterised in that：Described lower cylinder and the blind end of outer sleeve
Extend out to an installed surface vertical with cylinder axis respectively, described installed surface has installing hole.
8. according to claim 7 set ball vertical earthquake isolating cylinder it is characterised in that：Described set spheroid is by least one
Independent solid and/or hollow ball composition；The material of described ball is natural rubber, synthetic rubber, high-damping rubber, mixes height
The rubber of strong fiber, silica gel, other super-elasticity or viscoelastic material, or be composited by aforementioned at least two layers of material；
Described damping obturator is damping oil and/or damping grease；Described lower cylinder, dividing plate, upper guide, outer sleeve, inner sleeve and installed surface,
Material therefor is steel, high-strength alloy, high strength RC, or the combination of aforementioned at least two materials.
9. according to claim 5 set ball vertical earthquake isolating cylinder it is characterised in that：Described lower cylinder, upper guide, outer sleeve,
Inner sleeve is cylinder；Described dividing plate is circle, and its diameter is slightly less than the internal diameter of lower cylinder.
10. according to claim 1 set ball vertical earthquake isolating cylinder it is characterised in that：It also includes rubber sheath, described rubber
Plastic boot covers on outside shock insulation cylinder, and its two ends is separately fixed on installed surface；The total length of described rubber sheath be more than set ball every
The height of shake cylinder adds maximum displacement stroke sum, and with diameter greater than lower cylinder external diameter, thickness is 5～10mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629651.7A CN104389353B (en) | 2014-11-07 | 2014-11-07 | Integral ball vertical vibration isolation tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629651.7A CN104389353B (en) | 2014-11-07 | 2014-11-07 | Integral ball vertical vibration isolation tube |
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| CN104389353A CN104389353A (en) | 2015-03-04 |
| CN104389353B true CN104389353B (en) | 2017-02-22 |
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| CN201410629651.7A Expired - Fee Related CN104389353B (en) | 2014-11-07 | 2014-11-07 | Integral ball vertical vibration isolation tube |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704438A (en) * | 2015-11-12 | 2017-05-24 | 中国电力科学研究院 | Array damping-ball shock absorption device |
| CN106758794A (en) * | 2017-01-17 | 2017-05-31 | 成都启立辰智科技有限公司 | Bridle iron structure |
| CN107938560B (en) * | 2017-11-01 | 2021-01-15 | 中铁大桥勘测设计院集团有限公司 | Energy consumption device and anti-collision facility |
| CN108816529A (en) * | 2018-08-08 | 2018-11-16 | 江苏同泽过滤科技有限公司 | A kind of centrifugal base damping shock absorber |
| CN109137719B (en) * | 2018-10-17 | 2020-02-14 | 常州大学 | Mixed damping vibration isolator suitable for bridge vibration |
| CN110424256B (en) * | 2019-06-21 | 2021-03-02 | 江苏鸿基节能新技术股份有限公司 | Shock isolator based on shear thickening fluid and capable of resisting impact and sliding |
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| JP2010116945A (en) * | 2008-11-11 | 2010-05-27 | Kihei Ito | Three-dimensional base isolation support |
| CN101581346A (en) * | 2009-04-25 | 2009-11-18 | 大连理工大学 | Anti-torsion energy dissipater with internal collision-friction-deformation three-stage energy dissipation |
| CN104005492A (en) * | 2014-05-16 | 2014-08-27 | 重庆大学 | Quicksand type energy dissipation shock absorption and damping hybrid device |
| CN204252314U (en) * | 2014-11-07 | 2015-04-08 | 广州大学 | Set ball vertical earthquake isolating cylinder |
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| CN104389353A (en) | 2015-03-04 |
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