CN218931429U - Lifting appliance for adjusting folding of steel box girder - Google Patents
Lifting appliance for adjusting folding of steel box girder Download PDFInfo
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- CN218931429U CN218931429U CN202223054006.6U CN202223054006U CN218931429U CN 218931429 U CN218931429 U CN 218931429U CN 202223054006 U CN202223054006 U CN 202223054006U CN 218931429 U CN218931429 U CN 218931429U
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- box girder
- jack
- folding
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Abstract
The utility model discloses a lifting appliance for adjusting folding of a steel box girder, which comprises a bearing device, a connecting device and an adjusting device, wherein: the bearing device is a cross beam with stiffening plates at two sides; the connecting device is a compound connecting structure, and a single connecting device is formed by splicing an upper lifting lug and a lower lifting lug which are identical in specification and style and are oppositely arranged through bolts, wherein the upper lifting lug and the lower lifting lug are formed by welding a base and a hanging plate. The base of the upper lifting lug is welded with the cross beam of the bearing device, and the base of the lower lifting lug is welded with the bridge deck of the closed steel box girder. According to the utility model, when the steel box girder is lifted and folded through the lifting appliance, the three-way jack is used for adjusting the folding of the steel box girder from the transverse direction, the vertical direction and the longitudinal direction, so that the folding precision of the steel box girder is improved, the steel box girder is firm in installation and convenient to detach, the working efficiency is improved, and meanwhile, the adverse effects on the safety and traffic of the existing bridge structure caused by the installation of the steel box girder by the traditional bracket method are avoided by adopting the steel box girder lifting device.
Description
Technical Field
The utility model relates to the field of municipal bridge construction, in particular to a lifting appliance for adjusting folding of steel box girders.
Background
With the continuous development of municipal bridge construction technology, in order to reduce the congestion of the existing municipal traffic to the maximum extent, the construction of a municipal overhead becomes a necessary choice for the development of the urban traffic. When the overpass is designed, the overpass inevitably intersects with the existing bridge, and when the steel box girder of the overspan existing bridge is installed, the influence on the traffic and the structural safety of the existing bridge below is inevitably caused; and the steel box girder structure has more sections, heavy sections and extremely high assembling precision requirement.
The traditional folding method of the steel box girder mostly adopts a bracket method to carry out the installation construction of the steel box girder, and has the defects that the bracket is required to be erected on the existing bridge, the structural safety and traffic of the existing bridge are influenced, and the construction is not facilitated. And most of the steel box girders are manually adjusted when being folded, so that time and labor are wasted, and the folding precision can not be ensured while extremely high cost is input.
Disclosure of Invention
The utility model aims to provide a lifting appliance for adjusting folding of a steel box girder, which has the advantages of improving folding precision and working efficiency of the steel box girder, being firm in installation, convenient to detach, effectively accelerating construction progress, ensuring construction quality and saving construction cost.
The purpose of the utility model is realized in the following way:
a hoist for adjusting steel case roof beam folds, characterized by: comprises a bearing device, a connecting device and an adjusting device, wherein:
the bearing device comprises a beam and stiffening plates, the long-strip beam is of a double-spliced work steel structure, the stiffening plates are steel plates, and a plurality of stiffening plates are symmetrically arranged at the work steel weak axes at two sides of the beam;
the bottoms of the left end and the right end of the strip-shaped cross beam are respectively provided with a connecting device;
each connecting device consists of an upper lifting lug, a lower lifting lug and a bolt, wherein the upper lifting lug and the lower lifting lug with identical structures are formed by a base and a lifting plate which are connected into a whole, the bottom of the lifting plate is welded and fixed on the base, a circular notch is arranged in the middle of the lifting plate, the upper lifting lug is vertically arranged, the lower lifting lug is reversely arranged, the circular notch on the lifting plate on the upper lifting lug is horizontally aligned with the circular notch on the lifting plate of the lower lifting lug, and the bolt passes through the two circular notches to fix the upper lifting lug and the lower lifting lug together; the bottom of the base of the upper lifting lug is fixed at the bottom of the cross beam, and the bottom of the base of the lower lifting lug is fixed on the bridge deck of the folding steel box girder; the connecting device, the bearing device and the folding steel box girder are fixed into a whole;
a fine tuning device is arranged at the bottom of the left end of the strip-shaped cross beam and at the outer side of the connecting device;
the fine adjustment device comprises a three-way jack and a pad seat, wherein the three-way jack is a special lifting displacement tool and comprises a vertical jack, a transverse jack and a longitudinal jack, the three-way jack is arranged inside the pad seat, the top of the vertical jack is connected with the bottom of a cross beam of the bearing device, and the bearing device is directly moved in the vertical direction when the vertical jack is lifted.
The utility model comprises a bearing device, a connecting device and an adjusting device, wherein: the bearing device is a cross beam with stiffening plates at two sides; the connecting device is a compound connecting structure, and a single connecting device is formed by splicing an upper lifting lug and a lower lifting lug which are identical in specification and style and are oppositely arranged through bolts, wherein the upper lifting lug and the lower lifting lug are formed by welding a base and a hanging plate. The base of the upper lifting lug is welded with the cross beam of the bearing device, and the base of the lower lifting lug is welded with the bridge deck of the closed steel box girder; the adjusting device is three jacks capable of jacking in three directions and the cushion seat, the cushion seat is of a steel structure, the inner plane of the cushion seat is smooth, the three jacks are arranged on the cushion seat, and the cushion seat is smooth and has small friction force, so that the three jacks slightly move through jacking.
The utility model adopts the form of jack and lifting appliance, and mainly solves the two problems of adverse effect on the existing bridge and difficult adjustment precision caused by the construction of the steel box girder bracket: when the steel box girder is lifted and folded through the lifting appliance, the three-way jack adjusts the steel box girder to be folded from the transverse direction, the vertical direction and the longitudinal direction, so that the folding precision of the steel box girder is improved, the steel box girder is firm in installation and convenient to detach, the working efficiency is further improved, and meanwhile, the adverse effects on the safety and traffic of the existing bridge structure caused by the installation of the steel box girder by the traditional bracket method are avoided by adopting the steel box girder lifting device. Therefore, the utility model has the beneficial effects that:
1. the utility model avoids the influence on the structural safety and traffic of the existing bridge caused by erecting the bracket on the existing bridge when the steel box girder is folded above the existing bridge in the urban midspan, does not need to interfere the use and structural state of the existing bridge, can effectively accelerate the construction progress and ensures the construction quality;
2. the utility model can adjust the folding position of the steel box girder while hoisting and folding the steel box girder, avoids manually adjusting the steel box girder with larger section and heavier section, and greatly improves folding precision while saving time, manpower and cost;
3. the construction device is simple in structure, convenient to operate, quick in construction, safe, reliable, clear in stress and convenient to install and detach.
Drawings
FIG. 1 is a schematic front view of the present utility model;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a schematic view of the present utility model in use;
FIG. 4 is a schematic top view of the present utility model in use;
reference numerals: 1, an existing bridge below the bridge; 2 bridge piers; 3 side span steel box girders; folding the steel box girder; 5 lifting equipment; 6, a bearing device; a 61 beam; 62 stiffening plates; 7 a connecting device; 71 lifting lugs; 711 base; 712 hanger plates; 72 lower lifting lugs; 73 bolts; 7121 circular slot; 8, adjusting the device; 81 three-way jack; 811 vertical jack; 812 transverse jack; 813 longitudinal jacks; 82 pad seats.
Detailed Description
The utility model will be described in further detail below with reference to examples of embodiments and with reference to the accompanying drawings.
A lifting appliance for adjusting folding of steel box girders, which comprises a bearing device 6, a connecting device 7 and an adjusting device 8, wherein:
the bearing device 6 comprises a beam 61 and stiffening plates 62, the elongated beam 61 is of a double-spliced industrial steel structure, the stiffening plates 62 are steel plates, a plurality of stiffening plates 62 are symmetrically arranged at industrial steel weak axes on two sides of the beam 61, and the stiffening plates 62 are welded with the beam 61 to strengthen the tensile pressure capability of the beam;
a connecting device 7 is respectively arranged at the bottoms of the left end and the right end of the strip-shaped cross beam 61;
each connecting device 7 consists of an upper lifting lug 71, a lower lifting lug 72 and a bolt 73, wherein the upper lifting lug 71 and the lower lifting lug 72 which are identical in structure are formed by a base 711 and a lifting plate 712 which are connected into a whole, the bottom of the lifting plate 712 is welded and fixed on the base 711, a circular notch 7121 is arranged in the middle of the lifting plate 712, the upper lifting lug 71 is vertically arranged, the lower lifting lug 72 is reversely arranged, the circular notch 7121 on the lifting plate 712 on the upper lifting lug 71 is horizontally aligned with the circular notch 7121 on the lifting plate 712 of the lower lifting lug 72, and the bolt 73 passes through the two circular notches 7121 to fix the upper lifting lug 71 and the lower lifting lug 72 together; the base 711 is a rectangular steel block, and the hanging plate 712 is a steel plate; the bottom of the base 711 of the upper lifting lug 71 is fixed at the bottom of the cross beam 6, and the bottom of the base 711 of the lower lifting lug 72 is fixed on the bridge deck of the closed steel box girder 4; the connecting device 7, the bearing device 6 and the folding steel box girder 4 are fixed into a whole;
a fine tuning device 8 is arranged at the bottom of the left end of the strip-shaped cross beam 61 and outside the connecting device 7;
the fine adjustment device 8 comprises a three-way jack 81 and a cushion seat 82, wherein the interior of the cushion seat 82 is a smooth interface, and the friction force is extremely small; the three-way jack 81 is a special tool for lifting displacement and comprises a vertical jack 811, a horizontal jack 812 and a longitudinal jack 813, so that the lifting displacement capacity in the three directions of the horizontal direction, the vertical direction and the longitudinal direction is realized; the three-way jack 81 is arranged in the cushion seat 82, and the cushion seat 82 is smooth, so that the friction between the three-way jack 81 and the cushion seat 82 is small, and the three-way jack 81 can slide on the cushion seat 82 in a transverse displacement and longitudinal displacement manner through the lifting movement capability of the transverse jack 812 and the longitudinal jack 813; the top of the vertical jack 811 is connected to the bottom of the beam 61 of the load-bearing device 6, and the load-bearing device 6 is directly moved in the vertical direction when the vertical jack 811 is lifted.
The implementation steps are as follows:
1. firstly, welding and connecting a base 711 of a lower lifting lug 72 of two connecting devices 7 of a single lifting appliance with a bridge deck of a closed steel box girder 4;
2. a pad seat 82 is placed on the bridge deck of the side span steel box girder 3 in advance according to the position of a three-way jack 81 on a lifting appliance;
3. a lifting appliance is arranged near four corner points on the bridge deck of the folding steel box girder 4, and the four lifting appliances are symmetrically arranged on the transverse axis and the longitudinal axis of the folding steel box girder 4;
4. the four lifting devices near the four corner points on the folding steel box girder 4 are connected through the lifting equipment 5, lifting is carried out, and the folding steel box girder 4 is lifted to a folding position with the side span steel box girder 3 through the lifting devices;
5. after lifting in place, aligning the bottoms of the three-way jacks 81 in the adjusting device 8 with the cushion seats 82 positioned on the bridge deck of the side span steel box girder 3 in advance, and positioning and lofting are performed in advance due to the positions of the cushion seats 82, namely the axes in the folding steel box girder 4 are consistent with the axes in the side span steel box girder 3, but rough errors still exist between the two; after the three-way jack 81 in the adjusting device 8 is in butt joint with the pad seat 82, a vertical jack 811 in the three jacks 81 is pushed to slightly slide in the pad seat 82 by a transverse jack 812 and a longitudinal jack 813, so that the whole lifting appliance is driven to carry out fine adjustment in the transverse direction and the longitudinal direction, and the bearing device 6 is directly lifted by the vertical jack 811, so that fine adjustment of the positions of the folding steel box girder 4 below the lifting appliance in the transverse direction, the longitudinal direction and the vertical direction is completed, and the folding steel box girder 4 and the side span steel box girder 3 are accurately aligned; the whole construction process ensures the construction quality, and is convenient and quick to operate, and the construction device is simple and clear, so that the time, the cost and the manpower are saved.
The foregoing is only a preferred embodiment of the present utility model and is not intended to limit the scope of the claims, and all equivalent structural changes made by the present utility model are intended to be included in the scope of the claims.
Claims (2)
1. A hoist for adjusting steel case roof beam folds, its characterized in that: comprises a bearing device, a connecting device and an adjusting device, wherein:
the bearing device comprises a beam and stiffening plates, the long-strip beam is of a double-spliced work steel structure, the stiffening plates are steel plates, and a plurality of stiffening plates are symmetrically arranged at the work steel weak axes at two sides of the beam;
the bottoms of the left end and the right end of the strip-shaped cross beam are respectively provided with a connecting device;
each connecting device consists of an upper lifting lug, a lower lifting lug and a bolt, wherein the upper lifting lug and the lower lifting lug with identical structures are formed by a base and a lifting plate which are connected into a whole, the bottom of the lifting plate is welded and fixed on the base, a circular notch is arranged in the middle of the lifting plate, the upper lifting lug is vertically arranged, the lower lifting lug is reversely arranged, the circular notch on the lifting plate on the upper lifting lug is horizontally aligned with the circular notch on the lifting plate of the lower lifting lug, and the bolt passes through the two circular notches to fix the upper lifting lug and the lower lifting lug together; the bottom of the base of the upper lifting lug is fixed at the bottom of the cross beam, and the bottom of the base of the lower lifting lug is fixed on the bridge deck of the folding steel box girder; the connecting device, the bearing device and the folding steel box girder are fixed into a whole;
a fine tuning device is arranged at the bottom of the left end of the strip-shaped cross beam and at the outer side of the connecting device;
the fine adjustment device comprises a three-way jack and a pad seat, wherein the three-way jack is a special lifting displacement tool and comprises a vertical jack, a transverse jack and a longitudinal jack, the three-way jack is arranged inside the pad seat, the top of the vertical jack is connected with the bottom of a cross beam of the bearing device, and the bearing device is directly moved in the vertical direction when the vertical jack is lifted.
2. The spreader for adjusting folding of steel box girders according to claim 1, characterized in that: the base is rectangular steel block, and the hanger plate is steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054006.6U CN218931429U (en) | 2022-11-17 | 2022-11-17 | Lifting appliance for adjusting folding of steel box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054006.6U CN218931429U (en) | 2022-11-17 | 2022-11-17 | Lifting appliance for adjusting folding of steel box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218931429U true CN218931429U (en) | 2023-04-28 |
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ID=86065841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223054006.6U Active CN218931429U (en) | 2022-11-17 | 2022-11-17 | Lifting appliance for adjusting folding of steel box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218931429U (en) |
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2022
- 2022-11-17 CN CN202223054006.6U patent/CN218931429U/en active Active
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