CN101508403A - Girderr crane using three-point statically indeterminate hoisting system - Google Patents
Girderr crane using three-point statically indeterminate hoisting system Download PDFInfo
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- CN101508403A CN101508403A CNA2009100609856A CN200910060985A CN101508403A CN 101508403 A CN101508403 A CN 101508403A CN A2009100609856 A CNA2009100609856 A CN A2009100609856A CN 200910060985 A CN200910060985 A CN 200910060985A CN 101508403 A CN101508403 A CN 101508403A
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Abstract
The invention relates to a girder crane for a three-lifting joint statically indeterminate lifting system. A crane frame adopts a rhombohedral frame structure. The frame structure comprises a top rhombohedral structure body, an upright post rhombohedral structure body, a chassis rhombohedral structure body, a rear pull rod and a front stay bar, and the three pieces of rhombohedral structure bodies are tied together through space connection, wherein the upper end of the rear pull rod is hinged with the upright post structure body, and the lower end of the rear pull rod is hinged with the tail end of a main longitudinal girder of the chassis rhombohedral structure body; and the upper end of a main limb of a sway rod is hinged with the front end of a main longitudinal girder of the top rhombohedral structure body, and the lower end is connected with a flange bolt at the front end of the chassis rhombohedral structure body. A method for controlling the crane comprises that: lifting reversing winches of the girder lifting joints on both sides are synchronously controlled, and a middle lifting joint reversing winch adopts synchronous track and load proportion control. The girder crane solves the problems that three girder nodes of a steel girder have unstable structure because of not forming a bridge and are easy to deform in the hoisting process. The girder crane evenly applies the weight of the steel girder onto the formed bridge, improves the figure of the steel girder nodes formed into the bridge and solves the problem of the influence of the cable force of a steel cable.
Description
Technical field
The invention belongs to a kind of weight-lifting equipment.Particularly a kind of hoisting crane of setting a roof beam in place that utilizes the indeterminate tackling system of three suspension centres.
Background technology
In high speed railway, bridge construction, the heavy construction equipment technology has obtained widespread use at present, and advanced foreign technology is introduced, digests, absorbed to this type of heavy construction equipment more.For example: the combined Yangtze Bridge master of Wuhan Tian Xingzhou bridge is (98m+196m+504m+196m+98m) double tower three rope face cable-stayed bridges, the long 1092m of full-bridge.Cable-stayed bridge main-beam be plate girder in conjunction with steel truss girder, three main trusses adopt the welding integral node, N type truss, the high 15.2m in purlin, the wide 2 * 15m in purlin, panel length 14m, sections maximum weight are 650t.This steel truss girder sections weight is big, complex structure.Domestic employing of the past assembly mode of loosing, long in time limit, labour intensity is big, the cost height.
Conventional three suspension centres lifting pattern suspension centre distributes not on same straight line, and three suspension centres constitute a lifting plane, in the lifting process each suspension centre synchro control require lower, suspended object can be under the effect of gravity self-balancing.During the steel truss girder segment lifting, three suspension centres are on same straight line, and the steel truss girder sections is difficult for self-balancing, must be by the synchro control of three suspension centres, and the state of equilibrium of dynamically adjusting the steel truss girder sections guarantees the safety lifting.
Present stage, the electric machine speed regulation scheme of common hoisting crane generally adopted two kinds of string and rotor resistance or frequency controls.In the crane system of large steel girder segment lifting, use and all some drawbacks can occur.For string and rotor resistance mode, control accuracy is not high, starts to impact greatly, and energy consumption resistance is prone to fault.Pure frequency converter scheme, the action that hoists is comparatively steady, but transfers and accurately difficulty is finished comparatively in bit manipulation, and needing increases brake unit and braking resistor is transferred potential energy with consumption on a large scale.For entire equipment, first, improved the equipment integral cost, second, strengthened the scale and the maintenance difficulties of electric system.
Research and develop a kind of hoisting crane of setting a roof beam in place that can integral hoisting steel truss girder sections, to solving the duration contradiction of bridge construction, faster production, improve production efficiency and product quality has very profound significance.
Summary of the invention
The objective of the invention is on the basis of research similar products at home and abroad, to be based on autonomous innovation, on the basis that design and bridge construction are combined closely, overcome the duration problem, the simplification assembling process is enhanced productivity, and the hoisting crane of setting a roof beam in place of the indeterminate tackling system of a kind of usefulness three suspension centres is provided.
To achieve these goals, the present invention has taked following technical scheme:
Hoist frame of the present invention adopts rhombus rack construction, be characterized in: described rhombus rack construction, form by top diamond structure body, hound, back stay, column diamond structure body and chassis diamond structure body, connecting system by the space between three diamond structure bodies fuses, the back stay two ends are hinged with column diamond structure body and chassis diamond structure body, the hound upper end is hinged with the front end of the main longitudinal grider of top diamond structure body, and the flange bolt is passed through together with the front end of chassis diamond structure body in the lower end.The limit of three diamond structure bodies, middle purlin girder, the line of centers of the back stay of limit, middle purlin and limit, middle purlin diagonal brace master limb is corresponding in a plane with the line of centers of the limit of steel truss girder, middle purlin girder.
The present invention also provides a kind of hoisting crane " indeterminate " control method, and described " indeterminate " control method is: the suspension centre winch that hoists in purlin, both sides adopts synchro control, and middle suspension centre winch is by the control of load distribution value.For realizing that 3 lifting processes of steel truss girder keep " indeterminate " state, six winchs are by serial detecting device, the computing machine central control system is advanced in working state signal collections such as the steel cable displacement of the lines amount of operation process, motor torque, rotating speed, computing machine carries out Treatment Analysis to all related datas, keep " indeterminate " state requirement and safe operation condition by the lifting process, output is in good time adjusted, control signal.
The invention solves steel truss girder three purlin sections owing to do not become bridge, structure shakiness, the problem of easy deformation in the lifting process.The present invention is applied to the weight of steel truss girder on the Cheng Qiao equably, has improved the problem that influences of the Suo Li of the linear and cable wire of the steel truss girder sections of Cheng Qiao.
Description of drawings
Fig. 1 is the present invention's crane side view of setting a roof beam in place.
Fig. 2 is a top of the present invention diamond structure body birds-eye view.
Fig. 3 is a column diamond structure body birds-eye view of the present invention.
Fig. 4 is a chassis of the present invention diamond structure body birds-eye view.
Fig. 5 is an electrical control block scheme of the present invention.
Among the figure: 1M～6M-motor, VF1～VF6-frequency converter, WZna～WZnb-eddy-current brake, CMna～CMnb-cooling blower, TZna～TZnb-pusher brake, PZna～PZnb-plate disc brake, Mna～Mnb-torque sensor, Nna～Nnb-tachogenerator, Hna～Hnb-displacement pickup, Yna～Ynb-rope position detector switch, WF1～WF3-load transducer, * fsy-wind speed alarm signal, the on-the-spot tight guard's valve of * * jt-.
Fig. 6 is a system flowchart of the present invention.
The specific embodiment
The present invention is further elaborated below in conjunction with accompanying drawing.
Top diamond structure body of the present invention (Fig. 2) mainly is made up of purlin main longitudinal grider 2-1 in two limits top, purlin main longitudinal grider and a slice, transverse pitch between the main longitudinal grider is 15 meters, the top main longitudinal grider is the box variable section structure, the last plane of girder be provided with suspender vertically, the slideway of side travel, but the coaster that the longitudinal and transverse moving mechanism of suspender moves by vertical, horizontal is seated on the slideway, the movable and fixed pulley group that hoists that the suspender middle part is provided with fuses by the flat contact 2-2 that is made up of the H-girder bolt between three main longitudinal griders.The longitudinal and transverse moving mechanism of suspender can be realized longitudinal and transverse moving on the slideway of plane setting on the main longitudinal grider of top, reach steel truss girder splicing requirement.Diagonal brace structure 1-2 mainly is made up of purlin box diagonal brace master limb in purlin, two limits box diagonal brace master's limb and a slice, transverse pitch between the diagonal brace master limb is 15 meters, fuse by the flat contact of forming by the H-girder bolt between three diagonal brace master limbs, diagonal brace master limb upper end is hinged with the top girder, and the lower end by flange with the chassis structure bolt together.Column diamond structure body adopts the gate-type structure, mainly form by purlin master's limb in purlin, two limits column master limb and a slice, three column master limbs (3-1 among Fig. 3) are the box beam with variable cross-section, the lower end by flange with the chassis bolt, its top is hinged with back stay by hinge, fuses by the flat contact 3-2 that is become by the H-girder bolt between three column master limbs; Totally three of back stays, two of purlins, limit, middle purlin a slice, the transverse pitch between the back stay is 15 meters, and back stay 1-1 adopts box-type section, and two ends are hinged with chassis main longitudinal grider and column master limb by hinge respectively, and back stay adopts articulated form.Chassis diamond structure body 4-1 adopts the bolt structure based on box beam, i-shaped beams.Be provided with in the purlin, both sides, a purlin totally three main longitudinal griders, the transverse pitch between the main longitudinal grider is 15 meters, is linked to be by the plane connection structure between three main longitudinal griders to be one.Chassis structure provides supporting for column, hound, back stay, driver's cab, winch, hydraulic power unit etc.The main longitudinal grider front portion of chassis diamond structure is provided with front fulcrum butt flange under the column, and the afterbody anchor fitting is pressed on the main longitudinal grider by activity box crossbeam, and it is 15 meters that the transverse pitch of the transverse pitch of front fulcrum and back anchor point is.Transverse pitch between three main trusses of steel truss girder is 15 meters, the line of centers of the limit of steel truss girder, middle purlin girder and the limit of three diamond structure bodies, middle purlin main longitudinal grider, the line of centers correspondence of the back stay of limit, middle purlin and limit, middle purlin diagonal brace master limb is in a plane.
The hoisting crane master erecting equipment of setting a roof beam in place is three groups of double hoisting machines, is dragged by six 45kW variable-frequency motors, adopts frequency converter-eddy-current brake combined speed regulating mode, and the heavy potential energy loading condition of guarantee is transferred the safe in operation with secondary lifting.Keep " indeterminate " state for reaching 3 lifting processes of trusses, adopt Computer Control Technology that the lifting process is carried out control and management.Relatively independent on every group of double hoisting machine structure, six winchs are by serial detecting device, with the steel cable displacement of the lines amount of operation process, motor torque, rotating speed, play working state signal collection such as heavy lift and advance the computing machine central control system, computing machine carries out Treatment Analysis to all related datas, keep " indeterminate " state requirement and safe operation condition by the lifting process, output is in good time adjusted, control signal.
The lifting process keeps " indeterminate " state automatic guidance principle of work (Fig. 5): by computer system monitoring is carried out by two controlled object (forced stroke and motor torque) simultaneously in three Heave Heres, specific mode operation operation is pressed in three Heave Heres, at first, operational process is a benchmark with the forced stroke of one side suspension centre (left side), another side suspension centre (right side) carries out accurate tracking control by this benchmark, calculate both sides suspension centre forced stroke deviate by computer system according to the hoisting equipment steel cable displacement of the lines amount that detects, proofread and correct frequency of operation controlling quantity, by the running velocity of the adjusting corresponding elevator unit stroke follow-up control of finishing the work to frequency converter output in good time; Simultaneously, middle suspension centre elevator unit is then controlled by the load distribution value that satisfies " indeterminate " lifting requirement, suspension centre winch motor torque carries out accurate tracking to both sides suspension centre elevator machine operation torque promptly, computer system is according to the detected value of elevator machine operation torque, the torque settings value of suspension centre elevator motor in the reasonable operation torque conduct of suspension centre motor in the middle of calculating by " indeterminate " lifting requirements, deviate according to actual motor torque and setpoint torque, the frequency of operation controlling quantity of hoisting equipment frequency converter in the middle of in good time proofreading and correct, suspension centre elevator unit running velocity in the adjustment reaches three Heave Heres and keeps " indeterminate " lifting controlled target.Because motor torque is directly carried out monitoring, help rationally choosing with efficient balance and take winch power, avoid three suspension centre step-outs to cause the elevator motor overload.Transferring and the steady safe in operation of secondary lifting under the fully loaded transportation condition, be to compare analysis according to motor speed signal that detects and given operating value by computer system, by the influence situation of heavily loaded potential energy to electric machine operation state, drop into the brake unit and the resistance braking resistance of suitable power capability, the main adjustment frequency converter-motor-eddy-current brake group dynamic brake performance of passing through realizes.Cooperate the pusher brake of speed end and the plate disc brake of low speed end, fully loaded transportation condition is transferred with secondary lifting can obtain good characteristic and the safety control controlled.
The content that is not described in detail in this specification sheets belongs to this area professional and technical personnel's known prior art.
Claims (2)
1, a kind of hoisting crane of setting a roof beam in place that utilizes the indeterminate tackling system of three suspension centres, hoist frame adopts rhombus rack construction, it is characterized in that: rack construction is by chassis diamond structure body, column diamond structure body, top diamond structure body, hound, back stay assembly group constitutes, and wherein: chassis diamond structure body is formed by three main longitudinal griders and flat contact bolt; Column diamond structure body adopts box gate-type structure, and with the chassis Bolt Connection, its top is hinged by hinge and back stay by flange in the lower end; Top diamond structure body is made up of three top main longitudinal griders, the last plane of main longitudinal grider be provided with crane hanger vertically, the slideway of side travel, fuse by flat contact of forming by the H-girder bolt of rhombus between three top main longitudinal griders; Back stay is a box-structure, and totally three, the upper end of back stay is hinged with the column top, and the lower end is hinged with the tail end of chassis main longitudinal grider; Hound upper end is hinged with the front end of the main longitudinal grider of top diamond structure, and the flange bolt that the lower end is provided with chassis diamond structure body front end together.
2, according to the described hoisting crane of setting a roof beam in place that utilizes the indeterminate tackling system of three suspension centres of claim 1, its control method is: the suspension centre winch that hoists in purlin, both sides adopts synchro control, middle suspension centre winch is by the control of load distribution value, six winchs are by serial detecting device, the computing machine central control system is advanced in working state signal collections such as the steel cable displacement of the lines amount of operation process, motor torque, rotating speed, computing machine carries out Treatment Analysis to all related datas, and output is in good time adjusted, control signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910060985 CN101508403B (en) | 2009-03-06 | 2009-03-06 | Girderr crane using three-point statically indeterminate hoisting system |
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| CN 200910060985 CN101508403B (en) | 2009-03-06 | 2009-03-06 | Girderr crane using three-point statically indeterminate hoisting system |
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| CN101508403A true CN101508403A (en) | 2009-08-19 |
| CN101508403B CN101508403B (en) | 2011-05-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616654A (en) * | 2012-03-21 | 2012-08-01 | 武桥重工集团股份有限公司 | Rear anchoring device for steel truss girder erecting crane |
| CN102808379A (en) * | 2012-08-22 | 2012-12-05 | 株洲时代新材料科技股份有限公司 | Device for arch bridge inspection |
| CN105110207A (en) * | 2015-08-07 | 2015-12-02 | 中交路桥华南工程有限公司 | Hoisting system of object with asymmetric structure |
| CN106437131A (en) * | 2016-08-24 | 2017-02-22 | 无锡科通工程机械制造有限公司 | Three suspension centre hanging basket |
| CN110629676A (en) * | 2019-08-20 | 2019-12-31 | 中铁九桥工程有限公司 | Frame structure of large-tonnage beam erecting crane |
| CN111532999A (en) * | 2020-04-28 | 2020-08-14 | 中铁大桥局集团有限公司 | Beam erecting crane and beam erecting method |
| CN115305835A (en) * | 2022-08-15 | 2022-11-08 | 中铁九桥工程有限公司 | Construction method for erecting double-section whole-section steel truss girder by using girder erection crane |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916289A (en) * | 2006-08-28 | 2007-02-21 | 杨秋利 | Diamond shaped cradle in truss type |
| CN101219755B (en) * | 2007-12-14 | 2010-06-02 | 中铁大桥局股份有限公司 | Crane with heavy frame beam |
-
2009
- 2009-03-06 CN CN 200910060985 patent/CN101508403B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616654A (en) * | 2012-03-21 | 2012-08-01 | 武桥重工集团股份有限公司 | Rear anchoring device for steel truss girder erecting crane |
| CN102616654B (en) * | 2012-03-21 | 2013-10-16 | 武桥重工集团股份有限公司 | Rear anchoring device for steel truss girder erecting crane |
| CN102808379A (en) * | 2012-08-22 | 2012-12-05 | 株洲时代新材料科技股份有限公司 | Device for arch bridge inspection |
| CN105110207A (en) * | 2015-08-07 | 2015-12-02 | 中交路桥华南工程有限公司 | Hoisting system of object with asymmetric structure |
| CN106437131A (en) * | 2016-08-24 | 2017-02-22 | 无锡科通工程机械制造有限公司 | Three suspension centre hanging basket |
| CN110629676A (en) * | 2019-08-20 | 2019-12-31 | 中铁九桥工程有限公司 | Frame structure of large-tonnage beam erecting crane |
| CN111532999A (en) * | 2020-04-28 | 2020-08-14 | 中铁大桥局集团有限公司 | Beam erecting crane and beam erecting method |
| CN115305835A (en) * | 2022-08-15 | 2022-11-08 | 中铁九桥工程有限公司 | Construction method for erecting double-section whole-section steel truss girder by using girder erection crane |
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| Publication number | Publication date |
|---|---|
| CN101508403B (en) | 2011-05-25 |
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