CN104018595A - Lead enclosed type support constrained by loops continuously in layered mode - Google Patents
Lead enclosed type support constrained by loops continuously in layered mode Download PDFInfo
- Publication number
- CN104018595A CN104018595A CN201410247113.1A CN201410247113A CN104018595A CN 104018595 A CN104018595 A CN 104018595A CN 201410247113 A CN201410247113 A CN 201410247113A CN 104018595 A CN104018595 A CN 104018595A
- Authority
- CN
- China
- Prior art keywords
- constraint
- bearing
- constraint steel
- lead
- steel hoop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention provides a lead enclosed type support constrained by loops continuously in a layered mode. The support solves the problems that when an existing lead core rubber support moves laterally and deforms greatly, resistant-lateral rigidity is low, horizontal resilience is low, a lead core is prone to damage and failure, and mechanical properties are poor. A support basal body is formed by alternately arranging a plurality of steel plate layers and rubber bonding layers up and down in an overlaid and bonding mode and is provided with at least one vertical hole, a plurality of constraint steel hoops are arranged in the holes and are of a closed circular structure, inner ring walls of the constraint steel hoops are of an arc structure, the vertical thickness of the constraint steel hoops is larger than the thickness of the rubber bonding layers, the upper surface of the constraint steel hoop on the uppermost layer is located between the upper end face and the lower end face of the steel plate layer on the uppermost layer, and a cavity inside the constraint steel hoops is filled with enclosed lead tightly attached to the cavity in an embedded mode. Lateral moving rigidity of the support is enhanced, meanwhile the problem of ductile fracture damage to the lead is avoided, and stress operation is stable and mechanical properties are excellent under reciprocating horizontal lateral moving.
Description
Technical field
The present invention relates to civil engineering Seismic Resistance And Disaster Reduction field, relate in particular to the shock isolating pedestal in civil construction project, the plumbous body that is specially a kind of cuff layering continuous constraint seals formula bearing.
Background technology
Rubber earthquake isolation support is set in isolation structure and can effectively alleviates the vibration of engineering structures under horizontal earthquake action, reduce the action effects such as the earthquake acceleration, Earthquake Internal Force, displacement of structure, the anti-seismic performance of betterment works structure under rarely occurred earthquake, improves antidetonation capacity for the resistance to lodging.
Although rubber earthquake isolation support endurance and stiffness is little, but extending structure cycle greatly effectively reduced earthquake response, but the horizontal lateral resistance of General Purpose Rubber bearing approaches elasticity, damping ratio is very little, power consumption damping cannot be effectively provided, and its damping effect can not be given full play to; On the other hand, the endurance and stiffness of General Purpose Rubber bearing is very little, and isolation structure is moved greatly at horizontal earthquake downside.
For overcoming the above-mentioned shortcoming of General Purpose Rubber bearing, the lead core rubber supports that adopt, can provide larger rigidity and damping energy dissipation more both at home and abroad.Its general principle is: lead for retractable pencil is set in neoprene bearing, neoprene bearing is under horizontal shear effect, there is shear strain along with bearing sidesway in lead for retractable pencil, thereby increase restoring force and endurance and stiffness, and produce hysteretic energy after lead for retractable pencil surrender, the sidesway displacement of isolation structure under horizontal earthquake reduced, improve the safety of isolation structure.
Conventionally lead for retractable pencil is arranged in neoprene bearing, and because bearing is overlapped into by steel sheet layer and rubber layer, the contact interface between lead for retractable pencil and bearing has two kinds: the one, and the contact surface of lead and steel sheet layer, the 2nd, the contact surface of lead and rubber layer.When bearing, under horizontal shear effect, sidesway occurs, rubber layer produces shear strain, and lead for retractable pencil is also with the corresponding generation shear strain of rubber layer, thus surrender power consumption.
But, existing lead core rubber support, because plumbous shear yield strength is little, shear yielding power and damping force that lead for retractable pencil provides are little, thereby bearing equivalent level rigidity in the time that sidesway is larger is still inadequate, make the support displacement of isolation structure under severe earthquake action often exceed the permission sidesway value of bearing, affect the displacement safety of isolation structure.In order to increase the horizontal equivalent stiffness of lead core rubber support, general employing strengthened lead for retractable pencil Cross Section Method.
At present, the outstanding problem that increasing lead for retractable pencil cross section exists is: the poor stability of lead for retractable pencil mechanical property under horizontal sidesway large deformation.Under large horizontal side-move distortion, the side-move distortion of lead for retractable pencil is a complicated non-linear process, and existing material nonlinearity has again how much large deformation non-linear, and this and its situation under small deformation has a great difference.Lead for retractable pencil is in the elastic and plastic deformation process of non-linear sidesway, and the lead for retractable pencil deficiency that is tied, can produce large deformation surrender and degenerate and destroy.Existing bearing is mainly the steel sheet layer relying on wherein to the constraint of lead for retractable pencil, and rubber layer in bearing is very weak to the constraint of lead for retractable pencil, like this, heavy in section lead for retractable pencil is in bearing generation side-move distortion process, a little less than steel sheet layer seems relatively to the effect of contraction of lead for retractable pencil, it is wayward that lead for retractable pencil is sheared regression, and the corner angle of steel sheet layer end face make the distortion of lead for retractable pencil produce stratiform sudden change, easily there is damage in lead for retractable pencil, the elastoplasticity restoring force of bearing and anti-side stiffness degradation, the poor stability of the elastoplasticity hysteresis loop of reciprocating undersetting, restrict the effect after lead for retractable pencil increasing section.
In addition, strengthen lead for retractable pencil cross section and cause plumbous consumption to increase, manufacturing cost increases; And the pore volume content in the plumbous body of major diameter is wayward, in core hole, pressure is filled with plumbous difficulty increases, and quality is difficult for ensureing.
Summary of the invention
The present invention exists in order to solve existing lead core rubber support that low, the horizontal restoring force of anti-side rigidity is little when the sidesway large deformation, the easy damage of lead for retractable pencil and the not good problem of mechanical property, provides that large, the horizontal restoring force of a kind of anti-side rigidity is large, the plumbous body of function admirable and the convenient cuff layering continuous constraint of manufacturing seals formula bearing.
The present invention adopts following technical scheme to realize: the plumbous body of cuff layering continuous constraint seals formula bearing, comprise the bearing matrix that supports engineering structure, bearing matrix is by some steel plate layers and stacked bonding the making of rubber bound layer alternatively up and down, bearing matrix is provided with at least one vertical hole, in hole, be provided with some tight overlapped and constraint steel hoops of fitting tightly with hole up and down, constraint steel hoop is closed ring structure, and the internal ring wall of constraint steel hoop is arc structure, the vertical thickness of constraint steel hoop is greater than the thickness of rubber bound layer, the upper surface of the superiors' constraint steel hoop is between the superiors' steel plate layer upper and lower end face, the embedded plumbous body that seals fitting tightly with it that is filled with of cavity of constraint steel hoop inside.
The plumbous body of cuff layering continuous constraint of the present invention seals formula bearing, constraint steel hoop is located in the hole chamber of steel plate layer and rubber bound layer, and stacked forming, the internal ring wall of constraint steel hoop with seal plumbous body and directly contact, constraint steel hoop overlapped cuff assembly that is combined to form in vestibule, the sidewall that seals plumbous body all contacts with constraint steel hoop, avoided the end face of rubber bound layer to contact with sealing plumbous body, and constraint steel hoop is again that layering is overlapped.Bearing matrix and when sealing plumbous body, under horizontal shear effect, sidesway shear strain occurring, at constraint steel hoop and the contact surface place that seals plumbous body, because the case hardness of steel is far longer than plumbous hardness, constraint steel hoop produces extruding to sealing plumbous body, make to seal plumbous surface and produce plastic extruding deformation, thereby make the surface that seals plumbous body form corrugated crimp.Like this, on the one hand, sealing plumbous body produces in shear plasticity deformation process with bearing, the surface that seals plumbous body also produces plastic extruding deformation power consumption, the level surrender bearing capacity of bearing, anti-side rigidity and the more existing lead core rubber support of damping energy dissipation are significantly improved, on the other hand, constraint steel hoop and the close contact constraint sealing between plumbous body are pushed, and are extremely conducive to reduce to seal the surface damage fracture of plumbous body in plasticity shear strain process.And the internal ring wall of constraint steel hoop is curved, can make to seal between adjacent constraint steel hoop the constraint crimp continuous uniform transition of plumbous body, prevents sudden change and seal plumbous surface fracture damage.In addition, the vertical gauge of constraint steel hoop is greater than the thickness of rubber bound layer, can make the upper and lower level of rubber bound layer in bearing side-move distortion process, transmit horizontal force to constraint steel hoop to steel plate layer, avoid being embedded in adjacent level in the rubber bound layer between steel plate layer because manufacture alignment error makes to retrain steel hoop.Overcome that existing lead core rubber support exists in the time of sidesway large deformation that low, the horizontal restoring force of anti-side rigidity is little, the easy damage of lead for retractable pencil and the not good problem of mechanical property.
The cross section of constraint steel hoop is arc or circular, and the soffit of orlop constraint steel hoop is between orlop steel plate layer upper and lower end face.
The cross section of constraint steel hoop is arc or circular, and the internal ring wall that can make to retrain steel hoop is curved, and is convenient to processing assembling; The soffit of orlop constraint steel hoop, between orlop steel plate layer upper and lower end face, is equivalent to cuff assembly and has pressurized gap, and in the time that the vertical pressure-bearing of bearing produces certain small vertical compressive strain, cuff assembly can pressurized or generation compressive strain.
The horizontal gross area of hole is less than or equal to 1/4 of bearing matrix horizontal area, and the relative bearing matrix of the sectional dimension size that can avoid sealing plumbous body is bigger than normal, avoids the yield force of bearing and plasticity permanent set excessive.
The present invention has following beneficial effect:
1, the ingenious novelty of internal construction of the present invention.The plumbous body of cuff layering continuous constraint of the present invention seals formula bearing, constraint steel hoop is located in the hole chamber of steel plate layer and rubber bound layer, and stacked forming, constraint steel hoop overlapped cuff assembly that is combined to form in vestibule, in cuff assembly, pointing seals plumbous body.Owing to being provided with constraint steel hoop, therefore lead does not contact with rubber bound layer, the sidewall that seals plumbous body all contact with constraint steel hoop, and constraint rigidity strengthens greatly, and constraint steel hoop is that layering is overlapped, and permission bearing produces horizontal side-move distortion.
2, working mechanism uniqueness of the present invention, stressed working stability, good mechanical performance.While there is sidesway in bearing under horizontal shear effect, seal plumbous body and produce sidesway, seal the also horizontal sidesway changing of the relative positions of corresponding generation of the overlapped constraint steel hoop of plumbous body periphery layering, in sidesway process, produce shear strain except sealing plumbous body, constraint steel hoop also produces very strong confined pressure constraint with sealing the shear strain of plumbous body to sealing plumbous body sidewall, the internal ring wall of adding constraint steel hoop is curved, make to seal plumbous surface suffer restraints the constraint of steel hoop confined pressure protection and avoid ductile fracture damage, and the effect of contraction under the reciprocal horizontal sidesway of earthquake is stable.In existing lead for retractable pencil bearing, do not retrain steel hoop, plumbous body deformability is mainly shear strain, and plumbous body easily produces ductile fracture damage;
Meanwhile, because the rigidity of constraint steel hoop is very large, and seal intensity or the hardness that opposing steel part, plumbous surface is pressed into and support shear-stable intensity higher than it, thereby after sealing plumbous body and being subject to strong constraint, rigidity improves, ultimate bearing capacity also increases; Add the case hardness of the plumbous material of high-purity far below the hardness of steel, seal plumbous body and suffer restraints after the confined pressure constraint of steel hoop and still there is good plastic strain and surrender energy-dissipating property.Existing lead for retractable pencil bearing does not retrain the strong confined pressure constraint of steel hoop, and endurance and stiffness is little, and endurance and stiffness and power consumption increase and degenerate with side-move distortion.
3, the plumbous body of cuff layering continuous constraint of the present invention seals the mechanical property of formula bearing under horizontal force sidesway and is not subject to the impact of bearing vertical pressure load, reliable working performance.Because constraint steel hoop is closed ring, the internal ring wall of constraint steel hoop is curved, and the constraint steel hoop embedding in bearing matrix vestibule is that layering is stacked, and the pressurized contact surface between Layer constraint steel hoop is very little; On the other hand, the height of cuff assembly, a little less than the height of vestibule, is equivalent to cuff assembly and has pressurized gap, and in the time that the vertical pressure-bearing of bearing produces certain small vertical compressive strain, cuff assembly can pressurized or generation compressive strain.Thereby, when the vertical pressure-bearing of bearing, constraint steel hoop is not shared pressure or bears pressure minimum, the vertical axis power effect of bearing is mainly by rubber bound layer, steel plate layer and seal plumbous body and bear, and avoided constraint steel hoop to bear vertical pressure and duty and mechanical property while affecting horizontal force action.
4, functional part structure of the present invention is simple and clear, easily manufactured, and can reduce the consumption of high-purity lead material, cost-saving.The plumbous body of cuff layering continuous constraint of the present invention seals formula bearing, by constraint steel hoop is set in vestibule, and the overlapped formation cuff of constraint steel hoop layering assembly, the sidewall surfaces that seals plumbous body is all contacted with constraint steel hoop, block rubber bound layer end face and sealed contacting of plumbous body, thereby realize the loopful hoop constraint to plumbous body, the structure of functional part is simple and clear, easily manufactured.In addition, sealing plumbous body is subject to rigidity after strong constraint and improves, ultimate bearing capacity increases, plastic strain and surrender energy-dissipating property are stable, thereby under identical mechanical property condition, the plumbous body of cuff layering continuous constraint of the present invention seals the more existing bearing of formula bearing can reduce the consumption of the plumbous body material of high-purity material, cost-saving.
Reasonable in design of the present invention is reliable, realize the loopful hoop constraint to plumbous body by constraint steel hoop, avoid the problem of plumbous body ductile fracture damage, the endurance and stiffness of bearing is strengthened greatly, and effect of contraction under the reciprocal horizontal sidesway of earthquake is stable, good mechanical performance, and have advantages of simple in structure, easy to process and cost-saving.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is the structural representation of Fig. 1 in the time of occurred level sidesway.
In figure: 1-bearing matrix, 2-steel plate layer, 3-rubber bound layer, 4-retrains steel hoop, and 5-seals plumbous body.
Detailed description of the invention
The plumbous body of cuff layering continuous constraint seals formula bearing, comprise the bearing matrix 1 that supports engineering structure, bearing matrix 1 is by some steel plate layers 2 and stacked bonding the making of rubber bound layer 3 alternatively up and down, bearing matrix 1 is provided with at least one vertical hole, in hole, be provided with some tight overlapped and constraint steel hoops 4 of fitting tightly with hole up and down, constraint steel hoop 4 is closed ring structure, and the internal ring wall of constraint steel hoop 4 is arc structure, the vertical thickness of constraint steel hoop 4 is greater than the thickness of rubber bound layer 3, the upper surface of the superiors' constraint steel hoop 4 is between the superiors' steel plate layer 2 upper and lower end face, the embedded plumbous body 5 that seals fitting tightly with it that is filled with of cavity of constraint steel hoop 4 inside.
The cross section of constraint steel hoop 4 is arc or circular, and the soffit of orlop constraint steel hoop 4 is between orlop steel plate layer 2 upper and lower end face; The horizontal gross area of hole is less than or equal to 1/4 of bearing matrix 1 horizontal area.
In specific implementation process, by the steel plate layer 2 of bearing matrix 1 and the stacked assembling of 3 layering of rubber bound layer and carry out after vulcanizing treatment, again by the hole of the stacked embedding bearing of constraint steel hoop 4 layering matrix 1, form cuff assembly, finally form and seal plumbous body 5 at the plumbous material of the embedded raising purity of cuff assembly, complete the processing and manufacturing of bearing.
Claims (3)
1. the plumbous body of a cuff layering continuous constraint seals formula bearing, it is characterized in that: comprise the bearing matrix (1) that supports engineering structure, bearing matrix (1) is by some steel plate layers (2) and stacked bonding the making of rubber bound layer (3) alternatively up and down, bearing matrix (1) is provided with at least one vertical hole, in hole, be provided with some tight overlapped and constraint steel hoops (4) of fitting tightly with hole up and down, constraint steel hoop (4) is closed ring structure, and the internal ring wall of constraint steel hoop (4) is arc structure, the vertical thickness of constraint steel hoop (4) is greater than the thickness of rubber bound layer (3), the upper surface of the superiors' constraint steel hoops (4) is positioned between the superiors' steel plate layers (2) upper and lower end face, the inner cavity of constraint steel hoop (4) is embedded be filled with fit tightly with it seal plumbous body (5).
2. the plumbous body of cuff layering continuous constraint according to claim 1 seals formula bearing, it is characterized in that: the cross section of constraint steel hoop (4) is arc or circular, the soffit of orlop constraint steel hoop (4) is positioned between orlop steel plate layer (2) upper and lower end face.
3. the plumbous body of cuff layering continuous constraint according to claim 1 and 2 seals formula bearing, it is characterized in that: the horizontal gross area of hole is less than or equal to 1/4 of bearing matrix (1) horizontal area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247113.1A CN104018595B (en) | 2014-06-06 | 2014-06-06 | Lead enclosed type support constrained by loops continuously in layered mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247113.1A CN104018595B (en) | 2014-06-06 | 2014-06-06 | Lead enclosed type support constrained by loops continuously in layered mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104018595A true CN104018595A (en) | 2014-09-03 |
| CN104018595B CN104018595B (en) | 2017-01-11 |
Family
ID=51435564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410247113.1A Expired - Fee Related CN104018595B (en) | 2014-06-06 | 2014-06-06 | Lead enclosed type support constrained by loops continuously in layered mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104018595B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869565A (en) * | 2017-03-20 | 2017-06-20 | 太原恒晋减震科技有限公司 | A kind of slip support abutment |
| CN109024256A (en) * | 2018-09-06 | 2018-12-18 | 中铁第勘察设计院集团有限公司 | Lead damps vibration absorption and isolation support |
| CN110259238A (en) * | 2019-06-14 | 2019-09-20 | 太原理工大学 | Streaming variant compound support damper in the cylinder of the outer lead-sheathing body of rigid sleeve slide bar |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10159897A (en) * | 1996-12-02 | 1998-06-16 | Yokohama Rubber Co Ltd:The | Layered rubber support containing lead plug |
| JPH11148533A (en) * | 1997-11-14 | 1999-06-02 | Osaka Kako Kk | Manufacture of base isolation device |
| US20060137264A1 (en) * | 2004-12-07 | 2006-06-29 | Bridgestone Corporation | Seismic isolation apparatus |
| JP2007113696A (en) * | 2005-10-20 | 2007-05-10 | Toyo Tire & Rubber Co Ltd | Laminated rubber support device |
| CN101694111A (en) * | 2009-09-30 | 2010-04-14 | 无锡圣丰建筑新材料有限公司 | Lead core cladding vibration isolating rubber bearing |
| CN201574488U (en) * | 2009-09-30 | 2010-09-08 | 无锡圣丰建筑新材料有限公司 | Lead-coated shock absorbing rubber support |
| CN203924397U (en) * | 2014-06-06 | 2014-11-05 | 太原理工大学 | The plumbous body of cuff layering continuous constraint seals formula bearing |
-
2014
- 2014-06-06 CN CN201410247113.1A patent/CN104018595B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10159897A (en) * | 1996-12-02 | 1998-06-16 | Yokohama Rubber Co Ltd:The | Layered rubber support containing lead plug |
| JPH11148533A (en) * | 1997-11-14 | 1999-06-02 | Osaka Kako Kk | Manufacture of base isolation device |
| US20060137264A1 (en) * | 2004-12-07 | 2006-06-29 | Bridgestone Corporation | Seismic isolation apparatus |
| JP2007113696A (en) * | 2005-10-20 | 2007-05-10 | Toyo Tire & Rubber Co Ltd | Laminated rubber support device |
| CN101694111A (en) * | 2009-09-30 | 2010-04-14 | 无锡圣丰建筑新材料有限公司 | Lead core cladding vibration isolating rubber bearing |
| CN201574488U (en) * | 2009-09-30 | 2010-09-08 | 无锡圣丰建筑新材料有限公司 | Lead-coated shock absorbing rubber support |
| CN203924397U (en) * | 2014-06-06 | 2014-11-05 | 太原理工大学 | The plumbous body of cuff layering continuous constraint seals formula bearing |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869565A (en) * | 2017-03-20 | 2017-06-20 | 太原恒晋减震科技有限公司 | A kind of slip support abutment |
| CN109024256A (en) * | 2018-09-06 | 2018-12-18 | 中铁第勘察设计院集团有限公司 | Lead damps vibration absorption and isolation support |
| CN110259238A (en) * | 2019-06-14 | 2019-09-20 | 太原理工大学 | Streaming variant compound support damper in the cylinder of the outer lead-sheathing body of rigid sleeve slide bar |
| CN110259238B (en) * | 2019-06-14 | 2020-12-04 | 太原理工大学 | In-cylinder flow deformation composite support damper with rigid sleeve sliding rod externally coated with lead body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104018595B (en) | 2017-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203238803U (en) | Novel mixed energy-dissipation shock-absorption support | |
| CN103174229B (en) | Novel mixing energy-dissipated brace | |
| CN103388642B (en) | Utilize the pendulum spring for vibration damper of cfrp | |
| CN104018595A (en) | Lead enclosed type support constrained by loops continuously in layered mode | |
| CN206570980U (en) | A kind of vertical damping liquid damper | |
| CN204919583U (en) | Cushion cap formula shock insulation pile foundation | |
| CN203808295U (en) | Concrete-filled steel tube and double steel plate outer wrapped concrete combined shear wall | |
| CN111236285B (en) | Disconnect-type basis with subtract shock insulation function | |
| CN203924397U (en) | The plumbous body of cuff layering continuous constraint seals formula bearing | |
| CN104775358A (en) | Novel self reset shock insulation support seat | |
| CN201924478U (en) | Novel building structure shock absorption node | |
| CN202612693U (en) | Novel high-temperature polymerized double-sealing structure for gate valve spool | |
| CN202195054U (en) | I-shaped damping seal ring | |
| CN203200652U (en) | Light drawing-resistant support | |
| CN204940107U (en) | A kind of steel structure earthquake-resistant bearing | |
| CN210049424U (en) | Self-recovery energy dissipation and shock absorption device for building engineering | |
| CN108951911B (en) | Self-recovery energy consumption and shock absorption device for building engineering | |
| CN110259238B (en) | In-cylinder flow deformation composite support damper with rigid sleeve sliding rod externally coated with lead body | |
| CN102425106B (en) | Steel stranded rubber support and production method thereof | |
| CN212336376U (en) | Self-recovery energy dissipation and shock absorption device for building engineering | |
| CN211816400U (en) | Pre-buried anti-shear force reinforced structure of construction | |
| CN113585509A (en) | Novel self-resetting three-dimensional shock-insulation tensile support | |
| CN202175912U (en) | Steel hinge rubber support | |
| CN108396786B (en) | Vibration isolation device | |
| CN201795047U (en) | High-pressure resistant composite drum-type sealing ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20180606 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |