CN110206152A - The gimbal point structure of steel construction X beam Y shape column - Google Patents
The gimbal point structure of steel construction X beam Y shape column Download PDFInfo
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- CN110206152A CN110206152A CN201910479329.3A CN201910479329A CN110206152A CN 110206152 A CN110206152 A CN 110206152A CN 201910479329 A CN201910479329 A CN 201910479329A CN 110206152 A CN110206152 A CN 110206152A
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- Prior art keywords
- pedestal
- limiting slot
- coil
- sleeve body
- electromagnetic coil
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
- E04B1/344—Structures characterised by movable, separable, or collapsible parts, e.g. for transport with hinged parts
- E04B1/3441—Structures characterised by movable, separable, or collapsible parts, e.g. for transport with hinged parts with articulated bar-shaped elements
Abstract
The present invention relates to a kind of gimbal point structures of steel construction X beam Y shape column, offered on one in the outer wall of pedestal and the inner wall of sleeve body the limiting slot of stratiform or spiral distribution, be embedded on another it is internal full of magnetorheological fluid and exposed side in can elasticity insertion limiting slot bulge shape ring capsule, the electromagnetic coil being provided with around the stroke section for being looped around pedestal on sleeve body, electromagnetic coil access alternating current or energy storage device by control switch.The characteristics of being in fluid state under unpowered state using magnetorheological fluid, is moved up and down convenient for pedestal and carries out position adjustment；After pedestal is moved to setting position, persistently it is powered to the electromagnetic coil of magnetorheological fluid periphery, the magnetic field generated by electromagnetic coil, promoting magnetorheological fluid variation is solid state, it is locked on limiting slot, realizes the lock function in place of pedestal, reduce pedestal and act on the stress on crossbearer, to reduce stress between steel structure truss beam column, wind resistance reliability and installation convenience are improved.
Description
Technical field
The invention belongs to steel building field more particularly to a kind of gimbal point structures of steel construction X beam Y shape column.
Background technique
In Modern Steel Structure building, it often will appear and need capital and the hinged structure of beam, at present for such hinged segments
Most of design of point connection is the requirement for reaching approximate hinged joint by bolt, and bolt is in addition to transmitting all shearings
Outside, moment of flexure a small amount of outside undelivered face inner face is also transmitted.With the development of the social economy, more and more large spans, incline
The hinged structure in oblique capital and beam occurs, and in this class formation, reaches approximate hinged joint using a small amount of bolt is arranged
Requirement hinged at present has been not achieved in mode, because node rotation is larger on the node of this class formation, total moment of flexure is big, such as uses
It is bolted hinged joint, undelivered moment of flexure, which can be large enough to foot, has allowed bolt to be destroyed.Therefore for such special
Structure must have a kind of new attachment device, can release completely the face inner face Moments of hinged joint while and have sufficient intensity biography
Pass any direction shearing and vertical force.
First patent CN201310215883.3 discloses a kind of pivoting support and the steel structure node hinge using the support
Binding structure, the pivoting support include sleeve body, pedestal, core body, and core body has hinged end and connecting pin, and pedestal is equipped with only
De- structure.Using the pedestal with core body, class piston is vertically movable in sleeve body, is present in conjunction with core body and horizontally rotates in vivo,
The connection status adjustment for realizing any angle and any direction, reduces the moment of flexure stress of steel structure girder intercolumniation.
But when pedestal is in an intermediate position by the lifting of core body tractive force, because pedestal is hanging, and in order to guarantee seat
Its sufficiently wear-resistant self weight of body is larger, so pedestal can apply drop-down active force, the lower pulling force on core body after being adjusted in place
Bending stress can be generated on steel structure truss, had an adverse effect to steel structure truss installation and wind resistance.
Summary of the invention
The purpose of the present invention is to provide ten thousand of the steel construction X beam Y shape column of stress between a kind of reduction steel structure truss beam column
To node structure, its technical solution is as follows:
The gimbal point structure of steel construction X beam Y shape column, including sleeve body and its interior pedestal for sliding up and down setting, pedestal
Outer wall and sleeve body inner wall in offer the limiting slot of stratiform or spiral distribution on one, be embedded with inside on another
Full of magnetorheological fluid and exposed side in can elasticity insertion limiting slot bulge shape ring capsule, be provided on sleeve body and be looped around pedestal
Stroke section around electromagnetic coil, electromagnetic coil passes through control switch and accesses alternating current or energy storage device.Utilize magnetorheological fluid
The characteristics of fluid state is under unpowered state, moves up and down convenient for pedestal and carries out position adjustment；It is moved to and sets in pedestal
Positioning postpones, and is persistently powered to the electromagnetic coil of magnetorheological fluid periphery, and the magnetic field generated by electromagnetic coil promotes magnetorheological fluid
Variation is solid state, is locked on limiting slot, realizes the lock function in place of pedestal, reduces pedestal and acts on answering on crossbearer
Power improves wind resistance reliability and installation convenience to reduce stress between steel structure truss beam column.
Further, limiting slot is located on the inner wall of sleeve body and is arc groove, ring capsule is located on the outer wall of pedestal,
And the length of ring capsule is greater than the half of pedestal stroke section length.
Further, the width of rebate of limiting slot is less than the most short person in part of not set ring capsule on pedestal outer wall facade.
Further, it is also coated with the pressure between limiting slot and ring capsule on sleeve body and is greater than the pressure triggered when limit value
Power switch, pressure switch are serially connected in the primary circuit for directly connecting alternating current or energy storage device, are also serially connected in primary circuit just
Grade time-delay relay and primary coil, primary coil induction are connected with the first secondary loop, and the is serially connected in the first secondary loop
One secondary coil, the control switch and the electromagnetic coil, control switch are that delay is beaten in the power-off of primary time-delay relay
The normally closed delay switch opened.
Further, secondary time-delay relay is also serially connected in the first secondary loop, primary coil, which also incudes, is connected with
Secondary stage circuit has been sequentially connected in series second subprime coil, compensation magnet exciting coil and compensation field switch in second subprime circuit, has mended
It repays magnet exciting coil and the electromagnetic coil is wrapped on sleeve body in the same direction, compensation field switch is to be powered in secondary time-delay relay
The normally opened delay switch of time-delay closing afterwards.
Detailed description of the invention
Fig. 1 is the schematic diagram of the gimbal point structure of steel construction X beam Y shape column of the present invention；
Fig. 2 is the circuit diagram of the gimbal point structure of steel construction X beam Y shape column of the present invention.
Specific embodiment
Referring to Fig. 1, the structural schematic diagram of the gimbal point structure of steel construction X beam Y shape column of the present invention is shown.The node knot
The non-link position positioned at steel construction and ground base of structure, but be located between the beam column of truss, more bars especially as shown in the figure
Connecting node, the i.e. node structure are located at main support beam column and first branch's beam column, second branch's beam column, third branch beam column
At link position, using the common universal spherical joint chain link form of steel structure truss.Meanwhile in conjunction with piston of automobile formula above and below
Adjustment structure, it is ensured that node structure realizes three-dimensional multi-faceted stress load out control.Specific structure is as follows:
The gimbal point structure of steel construction X beam Y shape column includes sleeve body 1, pedestal 2, bulb body 3, anti-off board 4 and backing plate
5, sleeve body 1, pedestal 2, bulb body 3, anti-off board 4 and backing plate 5 structure and function belong to the prior art, reference can be made to formerly specially
Sharp CN2013102158833 is distinguished mainly to the locking structure in place of pedestal 2.
This in place locking structure include the layered distribution or Spiral distribution that are arranged on 1 inner wall of sleeve body 6 He of limiting slot
The hollow ring capsule 7 being embedded on 2 outer wall of pedestal, magnetorheological fluid 8 is filled in ring capsule 7, and the outer wall of ring capsule 7 is equipped with from pedestal 2
The bulge 9 that outer wall exposes, these bulges 9 elastic can be embedded in limiting slot 6, be also filled with magnetorheological fluid 8 in these certain bulges 9,
Easily can deviate from and be embedded in from limiting slot 6 when magnetorheological fluid 8 is in fluid state；It is in and fixes in magnetorheological fluid 8
When state, reliable insertion is locked in limiting slot 6.Coil box 10, installation in coil box 10 are set on the periphery of sleeve body 1
There are the electromagnetic coil 11 and compensation magnet exciting coil 12 for being sleeved on 1 periphery of sleeve body, electromagnetic coil 11 and compensation magnet exciting coil 12 are same
To the whole stroke sections for winding and coating pedestal 2 and move up and down in sleeve, that is, it is covered with the area between anti-off board 4 and backing plate 5
Between.The power supply of circuit locating for electromagnetic coil 11 and compensation magnet exciting coil 12 preferably uses herein from alternating current or energy storage device
Steam-electric power plant can be used in energy storage device, the energy storage device, because steel construction is under sunlight conditions throughout the year, so solar energy
The sufficient energy can be provided to it, while alternating current can be aided with, to guarantee the reliability of locking structure work；In addition, coil box 10
Inside it is perfused with insulating materials, such as epoxy resin, polyurethane.
Preferably, limiting slot 6 is located on the inner wall of sleeve body 1 and is arc groove, to be in fluid in magnetorheological fluid 8
When state, bulge 9 easily can take out and be embedded in limiting slot 6, reduce damping, facilitate pedestal 2 flexible in sleeve body 1
Up and down adjustment.Ring capsule 7 is located on the outer wall of pedestal 2 and the length of ring capsule 7 be greater than 2 stroke section length of pedestal two/
One, it is such setting primarily to subsequent setting sensing equipment consideration, can by the way that sensor is arranged in the middle part of sleeve body 1,
Sensor will be always between pedestal 2 and sleeve body 1.The width of rebate of limiting slot 6 is less than not set on 2 outer wall facade of pedestal
The most short person in the part of ring capsule 7 can guarantee that 2 outer wall facade of pedestal will not fall into limiting slot 6 using size difference, avoid clamping stagnation situation
Generation.
Preferably, referring to fig. 2, the circuit for showing the gimbal point structure use of steel construction X beam Y shape column in the present invention is set
Meter.Its principle is designed using multistage inductive loop, realizes that the magnetic field of magnetorheological fluid 8 in ring capsule 7 is gradually reinforced, to improve it
Working principle.Specific structure is as follows:
Mainly it is made of a primary circuit and multiple secondary loops.
Primary circuit turns on power supply, and be serially connected on it pressure switch 13, primary coil 14, primary resistance 15 and
Primary time-delay relay 16, pressure switch 13 are installed on sleeve body 1, are greater than limit with the pressure between limiting slot 6 and ring capsule 7
It is triggered when definite value, and the pressure switch 13 is normally closed switch, that is, under general use state, primary circuit is persistently to connect
Energization source；When steel structure truss is influenced by windage or installation active force, pedestal 2 have the tendency that relative sleeve body 1 it is mobile and
Increase relevant pressure, pressure switch 13 is opened, and primary circuit disconnects.
Secondary loop is divided into two kinds, a kind of active secondary loop to control its on-off by primary circuit, another kind be by
The driven secondary loop of another secondary loop control on-off.Active secondary coil 17, master have been sequentially connected in series on active secondary loop
Dynamic time-delay relay 18, active secondary resistance 19, electromagnetic coil 11 and control switch 20, control switch 20 be primary delay after
The normally closed delay switch of Time Delay Opening when electric appliance 16 powers off.
Driven secondary loop is divided into be in by the priority that active secondary loop or other driven secondary loops control on-off
It is last in rear class secondary loop, be sequentially connected in series in rear secondary loop rear secondary coil 21, in rear secondary resistance 23, mend
Magnet exciting coil 12 and compensation field switch 22 are repaid, compensation field switch 22 is in active time-delay relay 18 or driven delay relay
The normally opened delay switch of time-delay closing after device is powered.
Preferably, driven secondary loop there are two it is above when, directly control on-off by active secondary loop is priority
Positioned at before rear secondary loop in preceding secondary loop, preceding secondary loop in rear secondary loop the difference is that thereon
It is serially connected with the driven time-delay relay for controlling other driven secondary loops.
Claims (5)
1. the gimbal point structure of steel construction X beam Y shape column, including sleeve body and its interior pedestal for sliding up and down setting, feature
It is, offers the limiting slot of stratiform or spiral distribution in the outer wall of pedestal and the inner wall of sleeve body on one, on another
Embedded with it is internal full of magnetorheological fluid and exposed side in can elasticity insertion limiting slot bulge shape ring capsule, be provided on sleeve body
The electromagnetic coil being looped around around the stroke section of pedestal, electromagnetic coil access alternating current or energy storage device by control switch.
2. the gimbal point structure of steel construction X beam Y shape column according to claim 1, which is characterized in that limiting slot is located at set
It on the inner wall of cylinder and is arc groove, ring capsule is located on the outer wall of pedestal and the length of ring capsule is greater than pedestal stroke section
The half of length.
3. the gimbal point structure of steel construction X beam Y shape column according to claim 2, which is characterized in that the notch of limiting slot
Width is less than the most short person in part of not set ring capsule on pedestal outer wall facade.
4. the gimbal point structure of steel construction X beam Y shape column according to claim 1 or 2 or 3, which is characterized in that sleeve body
On be also coated with pressure between limiting slot and ring capsule and be greater than the pressure switch triggered when limit value, pressure switch is serially connected in directly
It connects in the primary circuit of alternating current or energy storage device, primary time-delay relay and primary coil is also serially connected in primary circuit,
Primary coil induction is connected with the first secondary loop, and the first secondary coil, the control switch are serially connected in the first secondary loop
With the electromagnetic coil, control switch is the normally closed delay switch of the Time Delay Opening in the power-off of primary time-delay relay.
5. the gimbal point structure of steel construction X beam Y shape column according to claim 4, which is characterized in that the first secondary loop
In be also serially connected with secondary time-delay relay, primary coil, which also incudes, is connected with second subprime circuit, in second subprime circuit successively
It is serially connected with second subprime coil, compensation magnet exciting coil and compensation field switch, magnet exciting coil is compensated and the electromagnetic coil is in the same direction
It is wrapped on sleeve body, compensation field switch is the normally opened delay switch of the time-delay closing after the energization of secondary time-delay relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479329.3A CN110206152B (en) | 2019-06-04 | 2019-06-04 | Universal joint structure of steel structure X-beam Y-shaped column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479329.3A CN110206152B (en) | 2019-06-04 | 2019-06-04 | Universal joint structure of steel structure X-beam Y-shaped column |
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| CN110206152A true CN110206152A (en) | 2019-09-06 |
| CN110206152B CN110206152B (en) | 2021-06-25 |
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| CN201910479329.3A Expired - Fee Related CN110206152B (en) | 2019-06-04 | 2019-06-04 | Universal joint structure of steel structure X-beam Y-shaped column |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565258A (en) * | 2021-07-23 | 2021-10-29 | 西安航天动力测控技术研究所 | Deformable truss structure |
| CN114508666A (en) * | 2022-03-02 | 2022-05-17 | 西安外事学院 | Self-locking mechanism of cloud platform for photography and camera shooting |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3224899A1 (en) * | 1982-07-03 | 1984-01-05 | Hans 7447 Aichtal Staeger | CONNECTING ELEMENT FOR PANELS |
| CN1888514A (en) * | 2006-07-13 | 2007-01-03 | 武汉理工大学 | Intelligent adjustable container overpressure protecting device and method based on magnetic flux variable liquid |
| CN102829121A (en) * | 2011-06-15 | 2012-12-19 | 浩华科技实业有限公司 | Variable gas spring with magnetorheological fluid stiffness damper |
| JP2013119806A (en) * | 2011-12-07 | 2013-06-17 | Denso Corp | Fluid brake device and valve timing adjusting device |
| CN103267159A (en) * | 2013-05-05 | 2013-08-28 | 吉林大学 | Double-acting magneto-rheological pressure and flow control valve |
| CN103362217A (en) * | 2013-06-03 | 2013-10-23 | 河南亚鹰钢结构幕墙工程有限公司 | Hinged support and steel structure node hinged structure employing support |
| JP2014200880A (en) * | 2013-04-04 | 2014-10-27 | トヨタ自動車株式会社 | Robot device, robot device controlling method and program |
| CN104775835A (en) * | 2015-01-26 | 2015-07-15 | 中国矿业大学 | Self-adjustment magnetorheological fluid single prop |
| CN105089264A (en) * | 2015-08-04 | 2015-11-25 | 四川建筑职业技术学院 | Magnetorheological type anti-falling and anti-toppling device of lifting scaffold |
| CN106584491A (en) * | 2017-01-03 | 2017-04-26 | 浙江工业大学 | Mechanical gripper based on magnetorheological effect |
| CN106907486A (en) * | 2017-03-09 | 2017-06-30 | 石家庄铁道大学 | The controllable compound sealing device and encapsulating method of sealing are driven for tunneling owner |
| CN107054395A (en) * | 2017-03-21 | 2017-08-18 | 中车山东机车车辆有限公司 | A kind of active control type actuator and bogie |
| CN207080003U (en) * | 2017-07-13 | 2018-03-09 | 柳州东方工程橡胶制品有限公司 | A kind of large bearing capacity permanent magnetism adjustable type MR damper |
| CN108018949A (en) * | 2016-10-28 | 2018-05-11 | 湖北鑫索建设有限公司 | A kind of connection joints of steel structure |
| KR20180114291A (en) * | 2017-04-10 | 2018-10-18 | 주식회사 금아하이드파워 | Magneto Rheological Damper for Decreasing |
| CN108923641A (en) * | 2018-05-22 | 2018-11-30 | 中国科学院高能物理研究所 | A kind of high pressure fast pulse power supply based on DSRD |
| CN109826905A (en) * | 2019-04-03 | 2019-05-31 | 吉林大学 | The energy damping of one kind controls vibration absorber certainly |
-
2019
- 2019-06-04 CN CN201910479329.3A patent/CN110206152B/en not_active Expired - Fee Related
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3224899A1 (en) * | 1982-07-03 | 1984-01-05 | Hans 7447 Aichtal Staeger | CONNECTING ELEMENT FOR PANELS |
| CN1888514A (en) * | 2006-07-13 | 2007-01-03 | 武汉理工大学 | Intelligent adjustable container overpressure protecting device and method based on magnetic flux variable liquid |
| CN102829121A (en) * | 2011-06-15 | 2012-12-19 | 浩华科技实业有限公司 | Variable gas spring with magnetorheological fluid stiffness damper |
| JP2013119806A (en) * | 2011-12-07 | 2013-06-17 | Denso Corp | Fluid brake device and valve timing adjusting device |
| JP2014200880A (en) * | 2013-04-04 | 2014-10-27 | トヨタ自動車株式会社 | Robot device, robot device controlling method and program |
| CN103267159A (en) * | 2013-05-05 | 2013-08-28 | 吉林大学 | Double-acting magneto-rheological pressure and flow control valve |
| CN103362217A (en) * | 2013-06-03 | 2013-10-23 | 河南亚鹰钢结构幕墙工程有限公司 | Hinged support and steel structure node hinged structure employing support |
| CN104775835A (en) * | 2015-01-26 | 2015-07-15 | 中国矿业大学 | Self-adjustment magnetorheological fluid single prop |
| CN105089264A (en) * | 2015-08-04 | 2015-11-25 | 四川建筑职业技术学院 | Magnetorheological type anti-falling and anti-toppling device of lifting scaffold |
| CN108018949A (en) * | 2016-10-28 | 2018-05-11 | 湖北鑫索建设有限公司 | A kind of connection joints of steel structure |
| CN106584491A (en) * | 2017-01-03 | 2017-04-26 | 浙江工业大学 | Mechanical gripper based on magnetorheological effect |
| CN106907486A (en) * | 2017-03-09 | 2017-06-30 | 石家庄铁道大学 | The controllable compound sealing device and encapsulating method of sealing are driven for tunneling owner |
| CN107054395A (en) * | 2017-03-21 | 2017-08-18 | 中车山东机车车辆有限公司 | A kind of active control type actuator and bogie |
| KR20180114291A (en) * | 2017-04-10 | 2018-10-18 | 주식회사 금아하이드파워 | Magneto Rheological Damper for Decreasing |
| CN207080003U (en) * | 2017-07-13 | 2018-03-09 | 柳州东方工程橡胶制品有限公司 | A kind of large bearing capacity permanent magnetism adjustable type MR damper |
| CN108923641A (en) * | 2018-05-22 | 2018-11-30 | 中国科学院高能物理研究所 | A kind of high pressure fast pulse power supply based on DSRD |
| CN109826905A (en) * | 2019-04-03 | 2019-05-31 | 吉林大学 | The energy damping of one kind controls vibration absorber certainly |
Non-Patent Citations (3)
| Title |
|---|
| 向红军: "《电磁感应线圈炮原理与技术》", 31 December 2015, 兵器工业出版社 * |
| 有贺泰: "《最先端技术》", 30 November 1985, 牛顿出版股份有限公司 * |
| 韩建勇等: "《流体密封技术》", 30 June 2006, 哈尔滨地图出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565258A (en) * | 2021-07-23 | 2021-10-29 | 西安航天动力测控技术研究所 | Deformable truss structure |
| CN114508666A (en) * | 2022-03-02 | 2022-05-17 | 西安外事学院 | Self-locking mechanism of cloud platform for photography and camera shooting |
| CN114508666B (en) * | 2022-03-02 | 2023-07-07 | 西安外事学院 | Self-locking mechanism of cradle head for photographing |
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| CN110206152B (en) | 2021-06-25 |
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