CN113443546B - Lifting appliance suitable for special-shaped box girder - Google Patents
Lifting appliance suitable for special-shaped box girder Download PDFInfo
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- CN113443546B CN113443546B CN202110522838.7A CN202110522838A CN113443546B CN 113443546 B CN113443546 B CN 113443546B CN 202110522838 A CN202110522838 A CN 202110522838A CN 113443546 B CN113443546 B CN 113443546B
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- 230000007246 mechanism Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 19
- 239000010959 steel Substances 0.000 abstract description 19
- 238000010276 construction Methods 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 5
- 206010066054 Dysmorphism Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a lifting appliance suitable for special-shaped box girders, which comprises a lifting bracket, distribution bottom girders and connecting pieces, wherein four distribution bottom girders are arranged below the lifting bracket, are opposite to each other, are respectively distributed on two sides of the special-shaped box girders to be lifted in the width direction, are arranged below each distribution bottom girder in the length direction, and are used for being connected with the special-shaped box girders; the distance between the opposite distribution beams positioned on two sides of the special-shaped box beam can be adjusted to adapt to the box beams with different widths and different angles, the lifting appliance can adapt to the special-shaped box beams with different widths and different angles, can also adapt to the marine construction environment with larger stormy waves, and can longitudinally, transversely and axially rotate by arranging the distribution bottom beam and the lifting bracket to be in flexible connection, and can adapt to the longitudinal and transverse included angles of the special-shaped steel box beam and the change of the connecting angles of the web lifting lugs.
Description
Technical Field
The invention relates to the field of hoisting equipment. More particularly, the invention relates to a steel box girder sling suitable for hoisting various special-shaped sections.
Background
The continuous progress of bridge construction technology, large-scale steel box girder segment integral installation technology is widely used, and special lifting appliances are usually required to be arranged according to the section characteristics of the steel box girder, and particularly for lifting of the variable-section special-shaped steel box girder, the lifting appliances capable of being universal are required to be designed, so that the requirements of lifting and installing various segments can be met. In order to solve the lifting demands of various special-shaped section steel box girders, the lifting tool structure of the steel box girders is optimally designed, so that the lifting tool structure can adapt to the width change of web plates of the steel box girders, simultaneously adapt to the change of the included angles of the web plates, simultaneously increase the automatic widening technology of the lifting tool cross beams, reduce the manual repeated disassembly and assembly in the changing process, increase the mounting and shelving of the lifting tool when being connected with the steel box girders, and improve the connection efficiency of the lifting tool and the steel box girders. Therefore, the designed steel box girder lifting appliance suitable for lifting various special-shaped sections can meet the lifting demands of various steel box girder section changes, has universality, can save lifting appliance conversion time and improves the efficacy.
Disclosure of Invention
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a spreader adapted to a profiled box girder, comprising a hanger, a distribution bottom girder and connecting pieces, wherein four distribution bottom girders are provided under the hanger, the four distribution bottom girders are arranged opposite to each other in pairs and are respectively distributed on both sides of the profiled box girder to be lifted in a width direction, a row of the connecting pieces is provided under each distribution bottom girder in a length direction thereof, and the connecting pieces are used for connecting to the profiled box girders;
The distance between the opposite distribution beams on both sides of the profiled box beam is adjustable to accommodate box beams of different widths.
According to a preferred embodiment of the present invention, in the spreader adapted to a profiled box girder, the spreader comprises a frame structure for connecting the distribution bottom girder and a lifting rod connected above the frame structure, wherein the frame structure is formed by splicing a pair of cross beams and a pair of connections Liang Shouwei, the cross beams are arranged along the width direction of the profiled box girder, and the connection beams are arranged along the length direction of the profiled box girder;
Wherein the length of the cross beam is adjustable to accommodate box beams of different widths.
According to a preferred embodiment of the present invention, in the lifting appliance adapted to the special-shaped box girder, four lifting rods are provided, and the four lifting rods are respectively connected to two ends of a pair of cross beams.
According to a preferred embodiment of the invention, in the lifting appliance adapting to the special-shaped box girder, the cross beam comprises two sections of main cross beams and at least one section of spliced girder spliced between the two sections of main cross beams, and the whole length of the cross beam is adjusted by adjusting the number of the spliced girders.
According to a preferred embodiment of the invention, in the spreader adapted to a profiled box girder, the distribution bottom girder is flexibly connected below the spreader.
According to a preferred embodiment of the invention, in the lifting appliance adapting to the special-shaped box girder, a plurality of lifting lugs are arranged on the upper surface of the upper bottom plate of the special-shaped box girder and used for being connected with the connecting piece, U ribs are arranged on the lower surface of the upper bottom plate of the special-shaped box girder, and the lifting lugs are staggered with the U ribs in the vertical direction.
According to a preferred embodiment of the invention, in the lifting appliance adapting to the special-shaped box girder, the distribution bottom girder is provided with one end connected with a supporting frame, and the other end of the supporting frame is placed on the special-shaped box girder to be lifted.
According to a preferred embodiment of the invention, in the lifting appliance adapting to the special-shaped box girder, one end of the supporting frame, facing the special-shaped box girder to be lifted, is placed on a cushion block with adjustable height, and the cushion block is temporarily placed on the special-shaped box girder to be lifted.
According to a preferred embodiment of the present invention, in the spreader adapted to a profiled box girder, the distribution bottom girder comprises a left distribution girder and a right distribution girder connected to each other, and the same number of connectors are symmetrically arranged under each of the left distribution girder and the right distribution girder.
According to a preferred embodiment of the present invention, in the spreader adapted to a profiled box girder, for the left side distribution girder or the right side distribution girder, each of the connection members includes two first rollers and one second roller which are disposed at intervals, wherein the two first rollers are fixed to the bottom of the distribution bottom girder through a fixing plate, one end of a balancing wire rope is fixed to one of the first rollers, the other end sequentially bypasses the second roller and the other first roller in the connection member, winds the second roller inside, and sequentially connects to the first roller, the second roller and the other first roller in the adjacent connection member until connecting to the outermost first roller in the outermost connection member;
and a lifting lug connecting plate is arranged below the second roller, and a mounting hole is formed in the center of the lifting lug connecting plate so as to be detachably connected with the lifting lug.
According to a preferred embodiment of the invention, in the lifting appliance adapting to the special-shaped box girder, the mounting hole of the lifting lug connecting plate is a vertically arranged strip-shaped through hole or a strip-shaped blind hole.
The invention at least comprises the following beneficial effects: the lifting appliance disclosed by the invention can be suitable for special-shaped box girders with different widths and different angles, can also be suitable for marine construction environments with larger wind waves, is flexibly connected with the distribution bottom girders, can rotate longitudinally, transversely and axially, and can be suitable for the longitudinal and transverse included angles of the special-shaped steel box girders and the change of the connecting angles of web lifting lugs.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a spreader adapted to a profiled box girder in the present invention.
Fig. 2 is a front view of a spreader adapted to a profiled box girder according to the invention.
Fig. 3 is a side view of a spreader adapted to a profiled box girder according to the invention.
Fig. 4 is a top view of a spreader adapted to a profiled box girder according to the invention.
Fig. 5 is a schematic view of the distribution bottom beam and the connecting members in the spreader adapted to a profiled box beam according to the invention.
Fig. 6 is a partial schematic view at a in fig. 1.
Fig. 7 is a schematic structural view of the cross beam in the present invention.
Fig. 8 is a schematic structural view of a guide mechanism in the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
As shown in fig. 1-8, an embodiment of the present invention provides a lifting appliance adapted to a special-shaped box girder, which comprises a lifting frame, a distribution bottom girder 2 and connecting pieces 3, wherein four distribution bottom girders 2 are arranged below the lifting frame, the four distribution bottom girders 2 are opposite to each other and are respectively distributed on two sides of the special-shaped box girder 4 to be lifted in the width direction, a row of connecting pieces 3 are arranged below each distribution bottom girder 2 in the length direction, and the connecting pieces 3 are used for connecting to the special-shaped box girder 4;
the distance between the opposite distribution beams 2 on both sides of the profiled box beam is adjustable to accommodate box beams of different widths.
In the above embodiment, considering that the special-shaped box girders 4 are large in size and long, 4 distribution bottom girders 2 are arranged symmetrically and are more stable, 4 distribution bottom girders 2 are divided into two groups, the two groups of distribution bottom girders 2 are respectively arranged on two sides of the special-shaped box girders 4 along the width direction, and each distribution bottom girder 2 is provided with a row of connecting pieces 3 along the length direction thereof, so that a plurality of parts of the lifting box girders with a larger range as much as possible can be ensured, and a row of connecting pieces 3 are arranged along the length direction of the special-shaped box girders, so that the gravity centers of the special-shaped box girders and the lifting frames are on the same plane and even the same straight line as much as possible, and the stability in the lifting process can be ensured.
In order to allow the spreader to accommodate different width profiled box girders 4, the distance between the opposing distribution beams 2 on both sides of the profiled box girders is here set to be adjustable to accommodate different width box girders, taking into account the width variations of the profiled box girders.
The following provides a structure of a hanger, which comprises a frame-shaped structure for connecting the distribution bottom beams 2 and a lifting rod 11 connected above the frame-shaped structure, wherein the frame-shaped structure is formed by splicing a pair of cross beams 12 and a pair of connecting beams 13 end to end, the cross beams 12 are arranged along the width direction of the special-shaped box beams 4, and the connecting beams 13 are arranged along the length direction of the special-shaped box beams 4;
Here, in order to achieve that the distance between the opposite distribution beams 2 located on both sides of the profiled box girder is adjustable, in the specific construction of the hanger described above, the length of the cross beam 12 is set to be adjustable to accommodate box girders of different widths.
A specific structure of the cross member 12 is specifically disclosed below, the cross member 12 includes two main cross members 121 and at least one spliced girder 122 spliced between the two main cross members 121, and the overall length of the cross member 12 is adjusted by adjusting the number of spliced girders 122. Typically, the spliced girder 122 has a structural dimension consistent with that of the main girder 121, so that the stress conditions of the two structures are more consistent.
Adjacent main beam 121 with the one end that the spliced girder 122 is close to each other can dismantle the connection, two adjacent spliced girders 122 are close to each other can dismantle the connection, so the convenience is follow-up according to actual conditions when adjusting the quantity of spliced girder 122, can realize quick splice installation, and specific detachable connection mode does not do specific restriction.
Considering that in the process of disassembling and assembling, because the spliced girder 122 has a large weight, the first disassembled end may be deformed downwards due to the action of gravity, which may lead to inaccuracy of the subsequent assembling and assembling, therefore, in the process of disassembling and assembling, at least one guide mechanism 124 is arranged on each main beam 121, and the guide rod 126 sequentially passes through the adjacent main beams 121, the guide mechanisms 124 on the spliced girder 122, or the guide mechanisms 124 on the adjacent two spliced girders 122, thereby realizing accurate positioning of the whole disassembling and assembling process and avoiding deviation.
A specific configuration of the guiding mechanism 124 is provided below, where the guiding mechanism 124 includes a first guiding plate 1241 and a second guiding plate 1242, and one ends of the two adjacent to each other form a receiving cavity 1243 together, so that the fixed end or the telescopic end of the hydraulic cylinder 125 extends into the receiving cavity 1243 respectively. One ends of the first guide plate 1241 and the second guide plate 1242, which are close to each other, are respectively sunken to form arc grooves, and the two arc grooves jointly form the accommodating cavity 1243.
When the length of the cross beam 12 is long, in order to further improve the overall strength, further fixed connection is performed by using the hydraulic cylinder 125, the fixed end of the hydraulic cylinder 125 is fixed on one of the main cross beams 121, and the telescopic end thereof is fixed on the other main cross beam 121.
Considering that the length of the hydraulic cylinder 125 is limited in practical construction, when the length of the beam 12 is too long, it is not sufficient, and the following measures are taken: the telescopic end of the hydraulic cylinder 125 is also coaxially connected with an extension rod.
In another embodiment, the number of the lifting rods 11 is four, and the four lifting rods 11 are respectively connected to two ends of the pair of cross beams 12.
In addition, when the offshore bridge is constructed, as the offshore wind wave is large, the lifting appliance can drift in the lifting process, but in order to improve the controllability of the lifting direction in the conventional lifting appliance, the lifting appliance is rigidly connected, is not suitable for the condition of the offshore wind wave, can be quickly bent and folded by the wind wave, and in order to solve the technical problem, the connection between the distribution bottom beam 2 and the lifting appliance is changed into flexible connection by improving, and the specific connection mode is as follows:
The top of the distribution bottom beam 2 is fixedly provided with two first fixed wheels 71 which are arranged in parallel, the bottom of the hanger is fixedly provided with two second fixed wheels 72 which are arranged in parallel, the first fixed wheels 71 and the second fixed wheels 72 are vertically arranged and are vertically separated by a certain distance to form a swinging space, one end of the balance rope 73 sequentially bypasses the accommodating groove on the outer circumference of one first fixed wheel 71, the accommodating groove on the outer circumference of one second fixed wheel 72, the accommodating groove on the outer circumference of the other first fixed wheel 71 and the accommodating groove on the outer circumference of the other second fixed wheel 72, and then the balance rope 73 is connected with the other end of the balance rope to form closed loop connection. The arrangement can ensure the stability of connection and realize flexible connection, and when the connection is blown by strong wind and strong waves, the distribution bottom beams 2 positioned below can also relatively rotate to adapt to the external environment, and the arrangement is also not afraid of that the whole connection is winded together by wind.
Based on the concrete structure of the hanger, the hanger comprises a frame-shaped structure for connecting the distribution bottom beam 2 and a lifting rod 11 connected above the frame-shaped structure, specifically, two first fixing wheels 71 which are arranged in parallel are fixedly arranged at the top of the distribution bottom beam 2, and two second fixing wheels 72 which are arranged in parallel are fixedly arranged at the bottom of the cross beam 12.
And because the included angles between adjacent sections in the special-shaped box girder are different, lifting lugs on the adjacent sections are not all in the same straight line. When different lifting lugs are in different straight lines, flexible connection of the distribution bottom beam 2 and the lifting frame can also realize the plane rotation adaptation change of the distribution bottom beam 2 so as to adapt to the lifting lugs at different positions on the steel box beam.
In another embodiment, in the lifting appliance adapting to the special-shaped box girder, a plurality of lifting lugs are arranged on the upper surface of the upper bottom plate of the special-shaped box girder 4 and used for being connected with the connecting piece, U ribs are arranged on the lower surface of the upper bottom plate of the special-shaped box girder, and the lifting lugs are staggered in the vertical direction.
When the offshore hoisting construction is carried out, the distribution bottom beam 2 is required to be temporarily fixed for construction safety when the connection of the connecting piece 3 and the special-shaped box beam is carried out, otherwise, the offshore wind is large, the offshore wind is possibly caused to shake, the connecting piece on the distribution bottom beam can drift along with the offshore wind, and the damage to workers is possibly caused, so that the support frame is arranged, the distribution bottom beam 2 is provided with one end of the connecting support frame, the other end of the support frame is placed on the special-shaped box beam 4 to be hoisted, when the construction is carried out, the distribution bottom beam 2 is lowered until the support frame connected to the bottom of the distribution bottom beam 2 is placed on the special-shaped box beam 2 to be hoisted, and then the connection between the connecting piece 3 and the lifting lug on the special-shaped box beam is carried out manually.
In the hoist of adaptation dysmorphism case roof beam, the support frame is towards the one end of waiting to hoist the dysmorphism case roof beam and is placed on highly adjustable cushion, the cushion is temporarily placed on waiting to hoist the dysmorphism case roof beam 4, highly adjustable of cushion is through adjusting the cushion to the hoist is convenient to be connected with the round pin axle of steel case roof beam lug, if the lug of steel case roof beam is shorter for instance, then needs the height of regulating the cushion, otherwise, then needs to increase for the distance between connecting piece 4 of hoist and the steel case roof beam lug is suitable, makes things convenient for workman to operate and connects. And after the lifting appliance and the steel box girder lifting lug are connected, the cushion blocks are disassembled before lifting, so that the distribution bottom girder and the steel box girder have enough separation gaps.
Considering that most of the lifting devices are directly lifted and are easy to incline, particularly in offshore lifting construction, the lifting devices are not suitable, and large wind and high waves are easy to incline, so that the distribution bottom beam 2 is designed in a balanced and symmetrical mode, specifically, the distribution bottom beam 2 comprises a left distribution beam and a right distribution beam which are connected with each other and are symmetrically arranged, and the same number of connecting pieces 3 are symmetrically arranged below the left distribution beam and the right distribution beam respectively.
Also, in view of the sea storm, in order to further maintain the stability, the connecting member is not simply connected by hooking, but is specially designed such that, for the left side distributing beam or the right side distributing beam, the connecting member 3 includes two first rollers 31 and one second roller 32 which are arranged at intervals, wherein the two first rollers 31 are fixed at the bottom of the distributing bottom beam 2 through a fixing plate 34, one end of a balancing wire rope 35 is fixed on one of the first rollers 31, the other end sequentially bypasses the second roller 32 and the other first roller 31 in the connecting member 3, the second roller 32 is wound around, and then sequentially connected to the outside of the one first roller 31, the second roller 32 and the other first roller 31 in the adjacent connecting member 3 until being connected to the outermost first roller 31 in the outermost connecting member 3; the lifting lug connecting plate 33 is arranged below the second roller 32, and a mounting hole 331 is formed in the center of the lifting lug connecting plate 33 so as to be detachably connected with the lifting lug.
According to a preferred embodiment of the present invention, in the hanger adapted to the profiled box girder, the mounting hole 331 of the lug connection plate 33 is a vertically arranged elongated through hole or elongated blind hole, and is not a conventional circle, so that the hanger can be more conveniently and detachably connected with the lug, and the lug can be mounted on the mounting hole 331 without being very accurate, which is very advantageous for offshore construction in windy.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. The lifting appliance is characterized by comprising a lifting frame, distribution bottom beams and connecting pieces, wherein four distribution bottom beams are arranged below the lifting frame, the four distribution bottom beams are opposite to each other and are respectively distributed on two sides of the special-shaped box beam to be lifted in the width direction, a row of connecting pieces are arranged below each distribution bottom beam in the length direction, and the connecting pieces are used for being connected with the special-shaped box beam;
the distance between the opposite distribution beams positioned on two sides of the special-shaped box beam can be adjusted so as to adapt to the box beams with different widths;
The hanger comprises a frame-shaped structure for connecting the distribution bottom beams and a lifting rod connected above the frame-shaped structure, wherein the frame-shaped structure is formed by splicing a pair of cross beams and a pair of connection Liang Shouwei, the cross beams are arranged along the width direction of the special-shaped box beams, and the connection beams are arranged along the length direction of the special-shaped box beams;
the length of the cross beams can be adjusted to adapt to box girders with different widths, four lifting rods are arranged, and the four lifting rods are respectively connected to two ends of a pair of cross beams;
the cross beam comprises two sections of main cross beams and at least one section of spliced beams spliced between the two sections of main cross beams, and the overall length of the cross beam is adjusted by adjusting the number of the spliced beams;
In the disassembly and assembly process, at least one guide mechanism is arranged on each main beam, a guide rod sequentially penetrates through the adjacent guide mechanisms on the main beams and the spliced beams or the adjacent guide mechanisms on the two spliced beams, the guide mechanisms comprise a first guide plate and a second guide plate, one ends of the first guide plate and the second guide plate, which are close to each other, jointly form a containing cavity, so that the fixed end or the telescopic end of the hydraulic cylinder respectively stretches into the containing cavity, one ends of the first guide plate and the second guide plate, which are close to each other, respectively sink inwards to form an arc-shaped groove, and the two arc-shaped grooves jointly form the containing cavity;
the top of the distribution bottom beam is fixedly provided with two first fixed wheels which are arranged in parallel, the bottom of the hanging bracket is fixedly provided with two second fixed wheels which are arranged in parallel, the first fixed wheels and the second fixed wheels are vertically arranged and are vertically separated by a certain distance to form a swinging space, one end of the balance rope sequentially bypasses the accommodating groove on the outer circumference of one first fixed wheel, the accommodating groove on the outer circumference of one second fixed wheel, the accommodating groove on the outer circumference of the other first fixed wheel and the accommodating groove on the outer circumference of the other second fixed wheel, and then the balance rope is connected with the other end of the balance rope to form closed loop connection;
The hanger comprises a frame-shaped structure for connecting the distribution bottom beam and a lifting rod connected to the upper portion of the frame-shaped structure, wherein two first fixed wheels which are arranged in parallel are fixedly arranged at the top of the distribution bottom beam, and two second fixed wheels which are arranged in parallel are fixedly arranged at the bottom of the cross beam.
2. The profiled box girder adapted hanger of claim 1, wherein said distribution bottom girder is flexibly connected below said hanger.
3. The lifting appliance adapting to the special-shaped box girder according to claim 1, wherein a plurality of lifting lugs are arranged on the upper surface of an upper bottom plate of the special-shaped box girder and are used for being connected with the connecting piece, U ribs are arranged on the lower surface of the upper bottom plate of the special-shaped box girder, and the lifting lugs are staggered in the vertical direction.
4. The spreader of claim 1, wherein the distribution bottom beam is disposed at one end of a connecting support frame, and the other end of the support frame rests on the profiled box beam to be lifted.
5. The spreader of claim 4, wherein the end of the support frame facing the profiled beam to be lifted rests on a height adjustable spacer that temporarily rests on the profiled beam to be lifted.
6. A spreader adapted to a profiled box girder according to claim 3, characterized in that the distribution bottom girder comprises a left distribution girder and a right distribution girder connected to each other, the left distribution girder and the right distribution girder being symmetrically provided with the same number of connectors, respectively.
7. The spreader for accommodating a profiled box girder according to claim 6, wherein for the left side distribution girder or the right side distribution girder, each of the connection members comprises two first rollers and one second roller which are arranged at intervals, wherein the two first rollers are fixed to the bottom of the distribution bottom girder through a fixing plate, one end of a balancing wire rope is fixed to one of the first rollers, the other end sequentially bypasses the second roller and the outer part of the other first roller in the connection member, and the second roller ring is wound inside and sequentially connected to the outer part of one first roller, the second roller and the other first roller in the adjacent connection member until being connected to the outermost first roller in the outermost connection member;
and a lifting lug connecting plate is arranged below the second roller, and a mounting hole is formed in the center of the lifting lug connecting plate so as to be detachably connected with the lifting lug.
8. The lifting appliance adapting to the special-shaped box girder according to claim 7, wherein the mounting hole of the lifting lug connecting plate is a vertically arranged strip-shaped through hole or a strip-shaped blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110522838.7A CN113443546B (en) | 2021-05-13 | 2021-05-13 | Lifting appliance suitable for special-shaped box girder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110522838.7A CN113443546B (en) | 2021-05-13 | 2021-05-13 | Lifting appliance suitable for special-shaped box girder |
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| CN113443546A CN113443546A (en) | 2021-09-28 |
| CN113443546B true CN113443546B (en) | 2024-06-04 |
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| CN112551342A (en) * | 2019-09-10 | 2021-03-26 | 广东博智林机器人有限公司 | Prefabricated staircase hoist |
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