CN215208027U - Lifting mechanism applied to lifting and mounting of main tower steel truss - Google Patents
Lifting mechanism applied to lifting and mounting of main tower steel truss Download PDFInfo
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- CN215208027U CN215208027U CN202022778860.1U CN202022778860U CN215208027U CN 215208027 U CN215208027 U CN 215208027U CN 202022778860 U CN202022778860 U CN 202022778860U CN 215208027 U CN215208027 U CN 215208027U
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Abstract
A lifting mechanism applied to lifting and mounting of a main tower steel truss comprises at least two pad beams, a main longitudinal beam, at least two through jacks, at least two steel strands, a lifting appliance and at least two vibration absorbing mechanisms. The two pad beams are arranged on the top surface of the main tower, and the main longitudinal beam is arranged on the upper end surface of the pad beam; the two penetrating jacks are arranged on the top surface of the main longitudinal beam, each penetrating jack fixes one steel strand, the two steel strands are hung on the same hanger, a vibration absorbing mechanism is arranged between the hangers and the main longitudinal beam, and a mass block is arranged in the vibration absorbing mechanism. The steel strand and the connecting piece thereof are equivalent to a double-single pendulum series system by using the vibration absorption mechanism, so that the main tower steel truss hoisted by the hoisting tool is positioned at a lagging pendulum position in the double-series single pendulum system, the swing amplitude of the main tower steel truss is effectively reduced, the motion stability of the main tower steel truss is greatly improved, and the main tower steel truss can provide a static and stable state for a constructor during hoisting, thereby implementing safe and effective butt joint work.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction, concretely relates to be applied to hoist mechanism of main tower steel truss promotion installation.
Background
With the development of science and technology, the structural form of bridges in China is more and more abundant, and a structure with a large steel truss arranged inside a concrete main tower exists, and the steel truss is usually heavy in structure weight, has a plurality of interfaces with the concrete main tower, and is high in interface size control requirement and large in installation difficulty. For the installation of the main tower steel truss, the prior art usually operates in a sectional hoisting or integral hoisting mode, if the sectional hoisting is adopted, the on-site welding is required, the defects of low efficiency, complex procedures, time and labor waste exist, and the welded stress deformation of the on-site welding can also cause the form distortion of the integral steel truss and damage the stability of the bridge main body; if a qualified steel truss is manufactured in advance and the whole section of the steel truss is hoisted, the whole main tower steel truss is too large in size, and once the size deviation occurs when the position of the installation interface is required to be accurately positioned at the hoisting end stage, the overweight main tower steel truss needs to be moved and adjusted, so that the operation is very troublesome; in addition, the main tower steel truss is easy to shake in the processes of lifting, adjusting and the like, even if the main tower steel truss is in a slight shaking state due to the blowing of wind power near the bridge, a constructor is difficult to perform installation and butt joint operations in the shaking process, and great operation danger exists in the operation process. Therefore, various defects existing in the existing main tower steel truss lifting installation technology need to be improved by a new technical scheme.
SUMMERY OF THE UTILITY MODEL
To the not enough among the above-mentioned prior art, the utility model provides a be applied to hoist mechanism of main tower steel truss promotion installation for realize safe, accurate, convenient promotion installation work to main tower steel truss.
The utility model discloses a following technical scheme implements: a lifting mechanism applied to lifting and mounting of a main tower steel truss comprises at least two pad beams, a main longitudinal beam, at least two through jacks, at least two steel strands, a lifting appliance and at least two vibration absorbing mechanisms. The two pad beams are respectively arranged at the front end area and the rear end area of the top surface of the concrete main tower in a symmetrical mode, two ends of the main longitudinal beam are attached to the upper end surfaces of the two pad beams, and the attachment parts at two ends of the main longitudinal beam are respectively provided with a lubricating plate with a lubricating function, so that the main longitudinal beam can be attached to the lubricating plates to move in the horizontal direction; the two penetrating jacks are arranged on the top surface of the main longitudinal beam at a certain interval, each penetrating jack fixes one end of one steel strand, the other ends of the two steel strands extend downwards and penetrate through the through hole of the main longitudinal beam, then the same lifting appliance is hung in a hanging mode, meanwhile, a part of each steel strand in the area between the lifting appliance and the main longitudinal beam is provided with a vibration absorption mechanism, a mass block is arranged in the vibration absorption mechanism, a heavy object hung by the lifting appliance and the mass block are combined to form a double-simple pendulum series system which takes the steel strands as cycloid and the penetrating jacks as hanging points, the heavy object hung by the lifting appliance is equivalent to a delayed pendulum, and therefore part of external force disturbance borne by the whole hanging mechanism is absorbed by the mass block and converted into swinging or circumferential motion of the vibration absorption mechanism, and the swinging amplitude or the circumferential motion radius of the delayed pendulum is reduced at the same time, the motion stability of hanging heavy object is improved.
Furthermore, a plurality of longitudinal moving jacks, a plurality of transverse moving jacks and a plurality of reaction seats are arranged on the upper end surface of the pad beam, the bodies of the longitudinal moving jacks and the transverse moving jacks are fixed through the reaction seats, the output shafts of the longitudinal moving jacks face the end surface of the main longitudinal beam, the output shafts of the transverse moving jacks face the side surface of the main longitudinal beam, and the reaction seats are fixed on the upper end surface of the pad beam in a welding mode.
Furthermore, the punching jack comprises an upper anchorage device, a main jack and a lower anchorage device, wherein the upper anchorage device, the main jack and the lower anchorage device are installed in a butt joint mode from top to bottom in sequence, the upper anchorage device and the lower anchorage device have the function of anchoring the wire through prestress, the main jack has the lifting function, and one end of the steel strand penetrates through inner holes of the lower anchorage device, the main jack and the upper anchorage device and is fixedly installed through the anchoring function of the upper anchorage device and the lower anchorage device.
Furthermore, the lifting appliance comprises a shoulder pole beam, two ear seat plates, two anchor seat plates and two pin shafts, wherein the ear seat plates are fixedly arranged in the areas of two sides of the upper end surface of the shoulder pole beam respectively, and the anchor seat plates form a hinged transmission relationship with the ear seat plates through the assembly of the pin shafts.
Furthermore, the vibration absorption mechanism comprises a mass block, two anchoring clamping pieces, four supports, four rubber wheels and a plurality of servo motors, wherein a through hole is formed in the middle of the mass block, the aperture of the through hole is matched with the outer diameter of the steel strand, and the size error of the through hole and the outer diameter of the steel strand is in a range of +4mm to-0.05 mm; the anchor clamping sheets have a wire anchoring function, the two anchor clamping sheets are installed at two ends of the mass block, two side areas of one side, facing the outer side, of each anchor clamping sheet are respectively provided with one support, each support is provided with one rubber wheel in a shaft hole matching mode, the side wall of each support is fixedly provided with the machine body of the servo motor, and the output shaft of the servo motor and the rubber wheels form a transmission relation.
Further, the part of the steel strand between the center-penetrating jack and the vibration absorbing mechanism is equivalent to a primary single cycloid, the part of the steel strand between the vibration absorbing mechanism and the hanger is equivalent to a secondary single cycloid, and the ratio of the primary single cycloid to the secondary single cycloid is 6.5: 1 to 1: 1.
Furthermore, the ratio of the weight of the mass block to the weight of the heavy object lifted by the lifting appliance is more than or equal to 0.025.
Furthermore, the mass block is made of lead.
Furthermore, the material of the lubricating plate contains polytetrafluoroethylene.
Furthermore, the pad beam is fixed on the top surface of the main tower through welding with an embedded part in the main tower.
Furthermore, the reaction seat is fixed on the main longitudinal beam in a submerged arc welding mode.
Further, the utility model discloses a mechanism respectively is equipped with one set in the both sides region of main tower top surface when the main tower steel truss of handling, through two the utility model discloses a mechanism provides two the hoist carries out combined handling to main tower steel truss.
The utility model has the advantages that:
1. the utility model discloses utilize the vibration-absorbing mechanism with steel strand wires and connecting piece equivalence for two series connection simple pendulum systems, make the main tower steel truss that the hoist was hoisted be in the hysteresis pendulum position in two simple pendulum series systems, the external force that causes disturbance factors such as handling, timing and wind-force is born by whole simple pendulum system jointly, because the amplitude of fluctuation of hysteresis pendulum lags behind the initial pendulum of top often, make partial disturbance external force convert into its own simple pendulum motion by the quality piece in the vibration-absorbing mechanism, and effectively reduce the amplitude of fluctuation of the main tower steel truss that is in the position of hysteresis pendulum, improve its motion stability by a wide margin simultaneously, make the main tower steel truss can provide more static, stable state for the constructor when the handling is docked, implement safe and effective butt joint installation work with this, effectively ensured bridge manufacture's efficiency of construction and personal safety, and improved bridge facility's cooperation precision and load-carrying capacity, has better social benefit.
2. The utility model discloses a main longitudinal beam and slip between the pad roof beam, timing mechanism and hoist mechanism make operation integration such as promotion, centering, installation of large-scale main tower steel truss, for the trade provides a high-efficient installation scheme who is applied to main tower steel truss, have that the installation effectiveness is high, the security is good, the characteristics that the interface counterpoint progress is high, the promotion installation of specially adapted large-scale main tower steel truss.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a side view of the present invention;
fig. 3 is a schematic structural view of the center-through jack of the present invention;
fig. 4 is a schematic structural diagram of a spreader of the present invention;
fig. 5 is a schematic structural diagram of a vibration absorbing mechanism in the present invention;
fig. 6 is a front view of the present invention in a state of lifting the steel truss of the main tower;
fig. 7 is a side view of the present invention in a state of lifting the steel truss of the main tower;
fig. 8 is a front view of the present invention in a state of butting the steel trusses of the main tower;
fig. 9 is a schematic diagram of the motion of the double-pendulum series system equivalent to the vibration absorbing mechanism of the present invention.
In the figure: 1-pad beam, 1 a-longitudinal moving jack, 1 b-transverse moving jack, 1 c-counter-force seat, 2-main longitudinal beam, 2 a-lubricating plate, 3-penetrating jack, 3 a-upper anchorage device, 3 b-main jack, 3 c-lower anchorage device, 4-steel strand, 5-lifting appliance, 5 a-shoulder beam, 5 b-ear seat plate, 5 c-pin shaft, 6-vibration absorbing mechanism, 6 a-mass block, 6 b-anchoring clamping piece, 6 c-support, 6 d-rubber wheel and 6 e-servo motor.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 1-5, a lifting mechanism for lifting and installing a main tower steel truss comprises two pad beams 1, a main longitudinal beam 2, two through jacks 3, two steel strands 4, a lifting appliance 5 and two vibration absorbing mechanisms 6. The two pad beams 1 are respectively arranged at the front end area and the rear end area of the top surface of the concrete main tower in a symmetrical mode, two ends of the main longitudinal beam 2 are attached to the upper end surfaces of the two pad beams 1, and the attachment parts at the two ends of the main longitudinal beam are respectively provided with a lubricating plate 2a made of polytetrafluoroethylene, so that the main longitudinal beam 2 can move in the horizontal direction in an attaching mode with the lubricating plates 2 a; the upper end surface of the pad beam 1 is provided with a plurality of longitudinal moving jacks 1a, a plurality of transverse moving jacks 1b and a plurality of counter-force seats 1c, the bodies of the longitudinal moving jacks 1a and the transverse moving jacks 1b are fixed through the counter-force seats 1c, the output shafts of the longitudinal moving jacks 1a face the end surface of the main longitudinal beam 2, the output shafts of the transverse moving jacks 1b face the side surface of the main longitudinal beam 2, and the counter-force seats 1c are fixed on the upper end surface of the pad beam 1 through submerged arc welding; the two penetrating jacks 3 are arranged on the top surface of the main longitudinal beam 2 at a certain interval and comprise an upper anchorage device 3a, a main jack 3b and a lower anchorage device 3c, wherein the upper anchorage device 3a, the main jack 3b and the lower anchorage device 3c are installed in a butt joint mode from top to bottom in sequence, the upper anchorage device 3a and the lower anchorage device 3c have the function of anchoring the wire through prestress, the main jack 3b has the lifting function, and one end of the steel strand 4 penetrates through inner holes of the lower anchorage device 3c, the main jack 3b and the upper anchorage device 3a and is fixedly installed through the anchoring function of the upper anchorage device 3a and the lower anchorage device 3 c. The other ends of the two steel strands 4 extend downwards and penetrate through the through holes of the main longitudinal beam 2, then the same lifting appliance 5 is hung in a hanging mode, the lifting appliance 5 comprises a carrying pole beam 5a, two ear seat plates 5b, two anchor device seats 5c and two pin shafts 5d, wherein the ear seat plates 5b are fixedly arranged in two side areas of the upper end face of the carrying pole beam 5a respectively, the anchor device seats 5c form a hinged transmission relationship with the ear seat plates 5b through the assembly of the pin shafts 5d, and the lower end heads of the two steel strands 4 are fixed on the two anchor device seats 5c respectively; meanwhile, the part of each steel strand 4 between the hanger 5 and the main longitudinal beam 2 is provided with one vibration absorbing mechanism 6, the vibration absorbing mechanism 6 comprises a mass block 6a, two anchoring clamping pieces 6b, four supporting seats 6c, four rubber wheels 6d and a plurality of servo motors 6e, wherein the mass block 6a is made of lead, a through hole is arranged in the middle of the mass block, the aperture of the through hole is matched with the outer diameter of the steel strand 4, the size error of the through hole and the outer diameter of the steel strand 4 is in the range of +4mm to-0.05 mm, the anchoring clamping pieces 6b have the wire anchoring function, the two anchoring clamping pieces 6b are arranged at two ends of the mass block 6a, the supporting seats 6c are respectively arranged in the two side areas of the surface of the anchoring clamping pieces 6b facing to the outside, each supporting seat 6c is provided with one rubber wheel 6e in a shaft hole matching manner, and the rubber wheels 6e are attached to the outer wall of the steel strand 4, the side wall of the support 6c is fixedly provided with a machine body of the servo motor 6e, and an output shaft of the servo motor 6e and the rubber wheel 6e form a transmission relation. The mass block 6a is arranged in the vibration absorption mechanism 6, so that a weight lifted by the lifting appliance 6 and the mass block 6a are combined to form a double-single pendulum series system which takes the steel strand 4 as a cycloid and the through jack 3 as a suspension point, the weight lifted by the lifting appliance 5 is equivalent to a lagging pendulum, part of external force disturbance borne by the whole suspension mechanism is absorbed by the mass block 6a and converted into swinging or circular motion of the vibration absorption mechanism 6, the swinging amplitude or circular motion radius of the lagging pendulum weight is reduced, and the motion stability of the suspended weight is improved.
The utility model discloses a concrete function is implemented to following step:
the method comprises the following steps: the main tower steel truss of selected needs handling, design quality piece 6a for weight equals the lead of main tower steel truss weight 0.08 times, then builds according to 6-7, makes the two sets the utility model discloses a mechanism divides left and right both sides to arrange in main tower up end to laminate and welded fastening with its backing beam 1 and main tower built-in fitting, wherein flagging hoist 5 also divides left and right both sides card among two inside grooves of main tower steel truss, at this moment, start respectively indulge move jack 1a and sideslip jack 1b make it pass main longeron 2 and make its laminating lubricated board slide successively, thereby adjust to the initial position that the centering is good.
Step two: in the initial state, the vibration absorbing mechanism 6 is set at the 1/3 section from bottom to top of the steel strand 4 in the initial state, the anchoring clamping piece 6b is adjusted by a tool to clamp the steel strand 4, so that the whole vibration absorbing mechanism 6 becomes an initial pendulum of the steel strand 4, a main tower steel truss hoisted by the lower lifting appliance 5 becomes a delayed pendulum, all the penetrating jacks 3 are started to accommodate the steel strand 4 at the moment, and the main tower steel truss is lifted upwards to be close to the upper butt joint platform.
Step three: when the main tower steel truss rises to approach a butt joint platform on a main tower, the adjustment operation of vibration, wind power or frequent start and stop forces the suspension system of the steel strand 4 to generate reciprocating swing or circumferential swing, wherein common circumferential swing is taken as an example, as shown in figure 9, the steel strand 4 is equivalent to a cycloid in a series simple pendulum system, a center-penetrating jack 3 is equivalent to a suspension point, a vibration absorbing mechanism 6 is equivalent to an initial pendulum, a lifting appliance 5 and a main tower steel truss lifted by the lifting appliance are equivalent to a delayed pendulum, the vibration absorbing mechanism 6 and the main tower steel truss respectively perform circular swing with constant radius at the moment, the swing track is shown as an ellipse in figure 9, the state when the swing amplitude of the swing lag is smaller than that of the vibration absorbing mechanism 6 is determined by using Lagrange's equation and stable motion conditions, so that a large number of disturbance factors are absorbed by a mass block 6a and converted into the self circumferential swing, and the main tower steel truss is restored to a static state by using the motion stability of the delayed pendulum, as shown in fig. 8, the main tower docking station is aligned in this stable state, and safe and efficient installation and docking work is performed.
Step four: when the wind power of the butt joint work site is large, the anchoring clamping piece 6b can be loosened to fasten the steel strand 4 through the tool, the servo motor 6e is started to enable the rubber wheels 6d to be attached to the outer wall of the steel strand 4 to roll, the vibration absorbing mechanism 6 moves upwards, when the proper position is reached, the tool is used again to fasten the anchoring clamping piece 6b, the length of the secondary single cycloid of the suspension lag post-swing is prolonged, the motion stability of the main tower steel truss is improved, and then the installation and butt joint work is implemented in the same manner in the third step.
Claims (10)
1. The utility model provides a be applied to hoist mechanism of main tower steel truss promotion installation, includes two at least pad roof beams, main longitudinal beam, two at least feed-through jacks, two at least steel strand wires, hoist, two at least vibration absorbing mechanism, its characterized in that: the two pad beams are respectively arranged at the front end area and the rear end area of the top surface of the concrete main tower in a symmetrical mode, two ends of the main longitudinal beam are attached to the upper end surfaces of the two pad beams, and the attachment parts at two ends of the main longitudinal beam are respectively provided with a lubricating plate with a lubricating function, so that the main longitudinal beam can be attached to the lubricating plates to move in the horizontal direction; the two penetrating jacks are arranged on the top surface of the main longitudinal beam at a certain interval, each penetrating jack fixes one end of one steel strand, the other ends of the two steel strands extend downwards and penetrate through the through hole of the main longitudinal beam, then the same lifting appliance is hung in a hanging mode, meanwhile, a part of each steel strand in the area between the lifting appliance and the main longitudinal beam is provided with a vibration absorption mechanism, a mass block is arranged in the vibration absorption mechanism, a heavy object hung by the lifting appliance and the mass block are combined to form a double-simple pendulum series system which takes the steel strands as cycloid and the penetrating jacks as hanging points, the heavy object hung by the lifting appliance is equivalent to a delayed pendulum, and therefore part of external force disturbance borne by the whole hanging mechanism is absorbed by the mass block and converted into swinging or circumferential motion of the vibration absorption mechanism, and the swinging amplitude or the circumferential motion radius of the delayed pendulum is reduced at the same time, the motion stability of hanging heavy object is improved.
2. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the upper end face of the pad beam is provided with a plurality of longitudinal moving jacks, a plurality of transverse moving jacks and a plurality of reaction seats, wherein the longitudinal moving jacks and the transverse moving jacks are fixed through the reaction seats, output shafts of the longitudinal moving jacks face the end face of the main longitudinal beam, the transverse moving jacks face the side face of the main longitudinal beam, and the reaction seats are fixed on the upper end face of the pad beam in a welding mode.
3. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the punching jack comprises an upper anchorage device, a main jack and a lower anchorage device, wherein the upper anchorage device, the main jack and the lower anchorage device are installed in a butt joint mode from top to bottom in sequence, the upper anchorage device and the lower anchorage device have the function of anchoring wires through prestress, the main jack has the lifting function, and one end of each steel strand penetrates through inner holes of the lower anchorage device, the main jack and the upper anchorage device and is fixedly installed through the anchoring functions of the upper anchorage device and the lower anchorage device.
4. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the lifting appliance comprises a shoulder pole beam, two ear seat plates, two anchor seat plates and two pin shafts, wherein the ear seat plates are fixedly arranged in the two side areas of the upper end surface of the shoulder pole beam respectively, and the anchor seat plates and the ear seat plates form a hinged transmission relationship through the assembly of the pin shafts.
5. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the vibration absorption mechanism comprises a mass block, two anchoring clamping pieces, four supports, four rubber wheels and a plurality of servo motors, wherein a through hole is formed in the middle of the mass block, the aperture of the through hole is matched with the outer diameter of the steel strand, and the size error of the through hole and the outer diameter of the steel strand is in a range of +4mm to-0.05 mm; the anchor clamping sheets have a wire anchoring function, the two anchor clamping sheets are installed at two ends of the mass block, two side areas of one side, facing the outer side, of each anchor clamping sheet are respectively provided with one support, each support is provided with one rubber wheel in a shaft hole matching mode, the side wall of each support is fixedly provided with the machine body of the servo motor, and the output shaft of the servo motor and the rubber wheels form a transmission relation.
6. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the part of the steel strand between the feed-through jack and the vibration absorbing mechanism is equivalent to a primary single cycloid, the part of the steel strand between the vibration absorbing mechanism and the lifting appliance is equivalent to a secondary single cycloid, and the proportion of the primary single cycloid to the secondary single cycloid is 6.5: 1 to 1: 1.
7. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the ratio of the weight of the mass block to the weight of the heavy object lifted by the lifting appliance is more than or equal to 0.025.
8. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: the mass block is made of lead, and the lubricating plate is made of polytetrafluoroethylene.
9. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: and the pad beam is fixed on the top surface of the main tower through welding with an embedded part in the main tower.
10. The lifting mechanism applied to the lifting installation of the main tower steel truss as recited in claim 1, wherein: when the mechanism is used for hoisting the main tower steel truss, one set of the lifting appliance is respectively arranged at the two side areas of the top surface of the main tower, and the two lifting appliances provided by the two sets of the mechanism are used for jointly hoisting the main tower steel truss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022778860.1U CN215208027U (en) | 2020-11-26 | 2020-11-26 | Lifting mechanism applied to lifting and mounting of main tower steel truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022778860.1U CN215208027U (en) | 2020-11-26 | 2020-11-26 | Lifting mechanism applied to lifting and mounting of main tower steel truss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215208027U true CN215208027U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022778860.1U Active CN215208027U (en) | 2020-11-26 | 2020-11-26 | Lifting mechanism applied to lifting and mounting of main tower steel truss |
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| Country | Link |
|---|---|
| CN (1) | CN215208027U (en) |
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2020
- 2020-11-26 CN CN202022778860.1U patent/CN215208027U/en active Active
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