CN218909569U

CN218909569U - Lifting appliance for mounting prefabricated small box girder

Info

Publication number: CN218909569U
Application number: CN202223111863.5U
Authority: CN
Inventors: 李晓罡; 叶春琳; 王洋洋; 侯宝宇; 田福东; 周识博
Original assignee: Beijing Construction Engineering Group Co Ltd
Current assignee: Beijing Construction Engineering Group Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-04-25
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses a lifting appliance for mounting a prefabricated small box girder, which comprises the following components: the middle part of the upper side of the cross beam is fixedly connected with a lifting ring, the left end and the right end of the cross beam are symmetrically provided with mounting grooves, one ends of the mounting grooves, which are far away from the lifting ring, are fixedly connected with rotating shafts, the outer sides of the rotating shafts are respectively and rotationally connected with curved supporting arms, one sides, which are close to the lifting ring, of the tops of the curved supporting arms are respectively and fixedly connected with a V-shaped turning arm, the lower protruding part of the middle part of the lower side of the V-shaped turning arm is respectively and rotationally connected with a first roller, one ends, which are far away from the curved supporting arms, of the V-shaped turning arms are respectively provided with fixing holes, and one ends, which are far away from the curved supporting arms, of the mounting grooves are respectively provided with bolt perforation holes; when the small box girder is lifted, the bottom of the small box girder can be automatically lifted in the process of lowering the small box girder by the crane, and the fixing bolts are only needed to be manually put on and screwed down in the process, so that the operation is simple, the construction is quick, and the construction efficiency is greatly improved.

Description

Lifting appliance for mounting prefabricated small box girder

Technical Field

The utility model belongs to the technical field of building construction, and particularly relates to a lifting appliance for mounting a prefabricated small box girder.

Background

The box girder is one of the middle girders of bridge engineering, the inside is hollow, and flanges are arranged on two sides of the upper part, which is similar to a box, thus obtaining the name. Single box, multiple boxes, etc. The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-situ box girder. The box girder combined bridge girder erection machine prefabricated in the independent place can be erected after the lower engineering is completed, so that the engineering progress can be accelerated, and the construction period can be saved;

at present, after prefabrication is finished, the prefabricated small box girder needs to be lifted to a mounting point so as to be convenient to install, the traditional mode adopts a steel wire rope for bottom lifting installation,

however, because the wire rope is in direct contact with the outer surface of the small box girder and the edges of the wing plates, the prefabricated small box Liang Bianjiao is worn by the wire rope, adverse effects are generated on the wire rope and the small box girder, and meanwhile, the wire rope is difficult to hang due to the fact that the weight of the wire rope is large in the process of hanging and releasing the wire rope manually, and potential safety hazards exist.

Disclosure of Invention

The utility model aims to provide a lifting appliance for installing a prefabricated small box girder, which solves the technical problems of difficult hanging, easy abrasion and potential safety hazard existing in the traditional method for installing the prefabricated small box by lifting the prefabricated small box by adopting a steel wire rope bottom.

The technical scheme for solving the technical problems is as follows: the utility model provides a hoist is used in installation of prefabricated small box roof beam, it includes the crossbeam, crossbeam upside middle part fixedly connected with rings, both ends symmetry has been seted up about the crossbeam, the equal fixedly connected with pivot of one end that rings were kept away from to the mounting groove, the pivot outside all rotates and is connected with bent trailing arm, the equal fixedly connected with V type turning arm in one side that bent trailing arm top is close to rings, the lower protruding position at V type turning arm downside middle part all rotates and is connected with first gyro wheel, the fixed orifices has all been seted up to the one end that bent trailing arm was kept away from to V type turning arm, bolt perforation has all been seted up to the one end that bent trailing arm was kept away from to the mounting groove, the fixed orifices can be aligned with the bolt perforation of homonymy, fixed bolt wears to be equipped with jointly in fixed orifices and the bolt perforation of homonymy.

The lifting appliance for mounting the prefabricated small box girder is adopted, and further: the upper warp end of bent bracket bottom all fixedly connected with rubber cushion, the equal fixedly connected with side support urceolus in one side that is close to rings in bent bracket middle part, equal sliding connection has side support slide bar in the side support urceolus, equal fixedly connected with is located the spring that side support urceolus between side support slide bar and the bent bracket, the side support slide bar is kept away from the one end of bent bracket and is all extended to the side support urceolus outside and all rotate and be connected with the second gyro wheel.

The lifting appliance for mounting the prefabricated small box girder is adopted, and further: stiffening plates are symmetrically and fixedly connected between the upper side and the lower side of the side supporting outer cylinder and the curved bracket arms.

The lifting appliance for mounting the prefabricated small box girder is adopted, and further: the left end and the right end of the front side of the cross beam are symmetrically and fixedly connected with guide frames, a hollow groove is formed in the guide frames, the upper end, the lower end and the middle bending part inside the hollow groove are respectively and rotatably connected with rotating wheels, and the rotating wheels on the same side are jointly connected with a rotating belt in a transmission mode.

The lifting appliance for mounting the prefabricated small box girder is adopted, and further: the upper half part of the guide frame is perpendicular to the cross beam, and the lower half part of the guide frame is inclined towards the direction far away from the hanging ring.

The lifting appliance for mounting the prefabricated small box girder is adopted, and further: and one end, far away from the bent bracket arm, of the upper side of the mounting groove is fixedly connected with a limit baffle above the bolt perforation.

The lifting appliance for mounting the prefabricated small box girder is adopted, and further: and inclined baffles positioned below the bolt perforation are symmetrically and fixedly connected to the front side and the rear side of one end, far away from the curved bracket arm, of the lower side of the mounting groove.

The beneficial effects of the utility model are as follows:

1. when the small box girder is lifted, the bottom of the small box girder can be automatically lifted in the process of lowering the small box girder by the crane, and the fixing bolts are only needed to be manually put on and screwed down in the process, so that the operation is simple, the construction is quick, and the construction efficiency is greatly improved.

2. In the process of lifting the small box girder, the small box girder is not in direct contact and collision with the small box girder, only the first roller, the second roller and the rotating belt are required to roll along the surface of the small box girder, and the rubber cushion block is in flexible contact with the bottom of the small box girder, so that abrasion between the steel wire rope and the small box girder can not occur, and the structural integrity of the small box girder and the lifting safety are ensured.

3. According to the lifting appliance, the small box girder can be aligned with the lifting appliance main body through the rotating belts at the two sides, and the small box girder and the lifting appliance main body can be kept more balanced through the cooperation of the side supporting outer cylinders, the side supporting sliding rods, the springs and the second rollers at the two sides, so that lifting failure caused by unbalance of lifting is avoided, and the success of one-time lifting is ensured.

Drawings

The foregoing and/or other advantages of the present utility model will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the utility model, wherein:

FIG. 1 is a schematic view of a front view structure of a lifting appliance for mounting a prefabricated small box girder according to an embodiment;

FIG. 2 is a schematic cross-sectional view of a cross-beam and its internal mechanism in accordance with one embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a mounting slot and a diagonal baffle according to one embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a side support outer cylinder and its internal structure according to one embodiment;

fig. 5 is a schematic view of a lifting device for mounting a prefabricated small box girder according to an embodiment.

In the drawings, the list of components represented by the various numbers is as follows:

1. a cross beam; 2. a hanging ring; 3. a mounting groove; 4. a rotating shaft; 5. a curved bracket arm; 6. a V-shaped turning arm; 7. a fixing hole; 8. a fixing bolt; 9. a first roller; 10. a limit baffle; 11. a bevel baffle; 12. a rubber cushion block; 13. a side support outer cylinder; 14. a side support slide bar; 15. a spring; 16. a second roller; 17. stiffening plates; 18. a guide frame; 19. a hollow groove; 20. a rotating wheel; 21. and (5) rotating the belt.

Detailed Description

Hereinafter, an embodiment of the hoist for mounting a prefabricated small box girder of the present utility model will be described with reference to the accompanying drawings.

The examples described herein are specific embodiments of the present utility model, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the utility model to the embodiments and scope of the utility model. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.

The drawings in the present specification are schematic views, which assist in explaining the concept of the present utility model, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present utility model, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.

Fig. 1-5 show a spreader for mounting a prefabricated small box girder according to an embodiment of the present utility model, comprising: the cross beam 1, rings 2 are fixedly connected to the middle part of the upper side of the cross beam 1, mounting grooves 3 are symmetrically formed in the left end and the right end of the cross beam 1, one ends, far away from the rings 2, of the mounting grooves 3 are fixedly connected with rotating shafts 4, curved supporting arms 5 are fixedly connected to the outer sides of the rotating shafts 4 in a rotating mode, V-shaped overturning arms 6 are fixedly connected to one sides, close to the rings 2, of the tops of the curved supporting arms 5, first idler wheels 9 are fixedly connected to the downward protruding portions of the middle parts of the lower sides of the V-shaped overturning arms 6 in a rotating mode, fixing holes 7 are formed in one ends, far away from the curved supporting arms 5, of the V-shaped overturning arms 6, bolt through holes are formed in one ends, far away from the curved supporting arms 5, of the mounting grooves 3, the fixing holes 7 can be aligned with bolt through holes on the same side, fixing bolts 8 are jointly penetrated in the bolt through holes on the same side, and limiting baffles 10 are fixedly connected to one ends, located above the bolt through the limiting baffles 10, and the limiting effect on the V-shaped overturning arms 6 can be achieved. The front side and the rear side of one end of the mounting groove 3, which is far away from the curved bracket arm 5, are symmetrically and fixedly connected with inclined baffle plates 11 positioned below bolt holes, and one end wall of the V-shaped overturning arm 6, which is far away from the curved bracket arm 5, can be guided to one end of the mounting groove 3, which is far away from the curved bracket arm 5, through the arrangement of the inclined baffle plates 11.

The upper warp end of bent bracket arm 5 bottom all fixedly connected with rubber cushion 12, the equal fixedly connected with side support urceolus 13 in one side that is close to rings 2 in the middle part of bent bracket arm 5, equal sliding connection has side support slide bar 14 in the side support urceolus 13, equal fixedly connected with is located the spring 15 that side support urceolus 13 between side support slide bar 14 and the bent bracket arm 5, the one end that bent bracket arm 5 was kept away from to side support slide bar 14 all extends to the outside of side support urceolus 13 and all rotates and be connected with second gyro wheel 16, symmetrical fixedly connected with stiffening plate 17 between the upper and lower both sides of side support urceolus 13 and the bent bracket arm 5, through the setting of stiffening plate 17, can strengthen the joint strength of side support urceolus 13 and bent bracket arm 5.

The left and right ends symmetry fixedly connected with guide frame 18 of crossbeam 1 front side, specifically, guide frame 18 upper half and crossbeam 1 mutually perpendicular, guide frame 18 lower half is to keeping away from the direction slope of rings 2, the hollow groove 19 has been seted up on the guide frame 18, the inside upper and lower both ends of hollow groove 19 and middle bending part are all rotated and are connected with runner 20, and the three of homonymy runner 20 is connected with the rotation belt 21 in the joint transmission.

Working principle:

when the lifting device is used, the fixing bolts 8 on the lifting appliance are firstly unscrewed, the left and right curved supporting arms 5 are respectively opened to the left and right under the weight action of the left and right curved supporting arms and the V-shaped overturning arms 6, and then the lifting appliance is lifted to the position above one end of the small box girder through the crane and slowly lowered; in the lowering process, the rotating belts 21 on the left side and the right side are firstly respectively contacted with the left side wing and the right side wing of the small box girder, the rotating belts 21 automatically rotate under the action of friction force and enable the lifting appliance to be aligned with the small box girder, then the first rollers 9 on the V-shaped overturning arms 6 on the two sides are respectively contacted with the two sides of the top surface of the small box girder, as the lifting appliance continues to descend, the small box girder pushes the V-shaped overturning arms 6 to overturn upwards and enable the curved bracket arms 5 to retract inwards, the first rollers 9 roll along the top surface of the small box girder, the gradually retracted curved bracket arms 5 enable the second rollers 16 at the tail ends of the side supporting slide bars 14 to roll along the webs on the same side of the small box girder, the upward-overturned V-shaped overturning arms 6 are smoothly inserted into the mounting grooves 3 under the guidance of the two opposite inclined baffle plates 11 until the upward-overturned V-shaped overturning arms are contacted with the limit baffle plates 10, at the moment, the fixing holes 7 on the V-shaped overturning arms 6 are exactly aligned with bolt through holes on the mounting grooves 3, and the rubber cushion blocks 12 at the bottoms of the two curved bracket arms 5 are just positioned under the two sides of the bottom surface of the small box girder respectively, then the fixing bolts 8 are inserted into the fixing holes 7 and the bolt holes and screwed up, the other lifting tool is sleeved at the other end of the small box girder, then two lifting tools are lifted simultaneously, along with the lifting of the lifting tools, the web plate of the small box girder extrudes the side support slide bars 14 at the same side to gradually retract into the side support outer cylinders 13, the side support slide bars 14 at the two sides and the second rollers 16 keep the small box girder relatively stable all the time under the action of the reaction force of the springs 15, the inclined sides do not incline with the lifting tools, and finally the rubber cushion blocks 12 at the bottoms of the curved bracket arms 5 at the left side and the right side are contacted with the left side and the right side of the ground of the small box girder respectively, so that the lifting of the small box girder is realized.

In summary, when the small box girder is lifted by the lifting appliance, the bottom of the small box girder can be automatically lifted in the process of lowering the small box girder by the crane, and the fixing bolt 8 is only needed to be manually put on and screwed in the process, so that the operation is simple, the construction is quick, and the construction efficiency is greatly improved; in the process of lifting the small box girder, the lifting appliance does not directly contact and collide with the small box girder, only needs to roll along the surface of the small box girder through the first roller 9, the second roller 16 and the rotating belt 21, and the rubber cushion block 12 is flexibly contacted with the bottom of the small box girder, so that the abrasion between a steel wire rope and the small box girder can not occur, and the structural integrity of the small box girder and the lifting safety are ensured; the small box girder can be aligned with the lifting appliance main body through the rotating belts 21 on two sides, and can be kept more balanced with the lifting appliance main body through the cooperation of the side supporting outer cylinders 13, the side supporting sliding rods 14, the springs 15 and the second rollers 16 on two sides, so that lifting failure caused by unbalanced lifting is avoided, and the success of one-time lifting is ensured.

The above disclosed features are not limited to the disclosed combinations with other features, and other combinations between features can be made by those skilled in the art according to the purpose of the utility model to achieve the purpose of the utility model.

Claims

1. Hoist is used in installation of prefabricated little case roof beam, characterized by includes: crossbeam (1), crossbeam (1) upside middle part fixedly connected with rings (2), mounting groove (3) have been seted up to both ends symmetry about crossbeam (1), mounting groove (3) keep away from the equal fixedly connected with pivot (4) of one end of rings (2), all rotate in the pivot (4) outside and be connected with bent bracket arm (5), one side that Qu Tuobei (5) top is close to rings (2) is equal fixedly connected with V type upset arm (6), the protruding position of falling down in V type upset arm (6) downside middle part is all rotated and is connected with first gyro wheel (9), fixed orifices (7) have all been seted up to one end that bent bracket arm (5) were kept away from to V type upset arm (6), bolt perforation has all been seted up to one end that bent bracket arm (5) was kept away from to mounting groove (3), fixed orifices (7) can be aligned with bolt perforation on the same side, fixed orifices (7) wear together in the bolt perforation on the same side.

2. The lifting appliance for installing the prefabricated small box girder according to claim 1, wherein the upturned ends of the bottoms of the Qu Tuobei (5) are fixedly connected with rubber cushion blocks (12), one sides of the middle parts of the Qu Tuobei (5) close to the lifting rings (2) are fixedly connected with side supporting outer cylinders (13), side supporting sliding rods (14) are fixedly connected in the side supporting outer cylinders (13), springs (15) located in the side supporting outer cylinders (13) are fixedly connected between the side supporting sliding rods (14) and the Qu Tuobei (5), and one ends, far away from the curved supporting arms (5), of the side supporting sliding rods (14) are all extended to the outer parts of the side supporting outer cylinders (13) and are all rotationally connected with second rollers (16).

3. The lifting appliance for installing the prefabricated small box girder according to claim 2, wherein stiffening plates (17) are symmetrically and fixedly connected between the upper side and the lower side of the side supporting outer cylinder (13) and the Qu Tuobei (5).

4. The lifting appliance for installing the prefabricated small box girder according to claim 1, wherein guide frames (18) are symmetrically and fixedly connected to the left end and the right end of the front side of the cross beam (1), hollow grooves (19) are formed in the guide frames (18), rotating wheels (20) are rotatably connected to the upper end, the lower end and the middle bending part of the inside of the hollow grooves (19), and rotating belts (21) are connected to the three rotating wheels (20) on the same side in a common transmission mode.

5. The lifting appliance for installing the prefabricated small box girder according to claim 4, wherein the upper half part of the guide frame (18) is perpendicular to the cross beam (1), and the lower half part of the guide frame (18) is inclined in a direction away from the lifting ring (2).

6. The lifting appliance for installing the prefabricated small box girder according to claim 1, wherein the end, far away from the bent bracket arm (5), of the upper side of the installation groove (3) is fixedly connected with a limit baffle (10) positioned above the bolt perforation.

7. The lifting appliance for installing the prefabricated small box girder according to claim 1, wherein inclined baffles (11) positioned below the bolt perforation are symmetrically and fixedly connected to the front side and the rear side of one end, far away from the bent bracket arm (5), of the lower side of the installation groove (3).