CN209922694U - Lifting appliance - Google Patents
Lifting appliance Download PDFInfo
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- CN209922694U CN209922694U CN201920122900.1U CN201920122900U CN209922694U CN 209922694 U CN209922694 U CN 209922694U CN 201920122900 U CN201920122900 U CN 201920122900U CN 209922694 U CN209922694 U CN 209922694U
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Abstract
The utility model relates to a lifting appliance, belonging to the technical field of mounting of steel box girders of suspension bridges, and the utility model provides a lifting appliance, which comprises a bearing girder; the fan-shaped plate is provided with at least two connecting holes at one end of the arc; the sling fork lug conversion head is used for detachably connecting one end of the sling fork lug conversion head with the sling fork lug, and the other end of the sling fork lug conversion head is in pin joint with the connecting hole; the steel strand conversion joint is detachably connected to one end of the steel strand conversion joint, and the other end of the steel strand conversion joint is in pin joint with the connecting hole; one end of the circle center of the sector plate is rotatably connected with the bearing beam. The utility model discloses reduced a large amount of support and dropped into, reduced the resource input of setting up, demolising the platform simultaneously.
Description
Technical Field
The utility model belongs to the technical field of suspension bridge steel case roof beam installation, concretely relates to hoist.
Background
With the high-speed development of economy in China, domestic large-span suspension bridges are developed at an unprecedented speed, and the suspension bridges have obvious advantages in large-span bridges across rivers, canyons and the like due to the characteristics of the suspension bridges.
The steel box girder of the long-span suspension bridge is generally larger in volume and weight. Therefore, the steel box girder is generally installed by using a special cable-spanning crane. In a shoal area or a shallow water riverbed, a barge cannot convey a steel box girder to a lifting position and is influenced by lifting conditions, a girder section of a tower area cannot be directly and vertically lifted by using a cable-crossing crane, and a traditional construction method is that a platform is erected, a rail is arranged to longitudinally move to the lifting position, and then the steel box girder is vertically lifted.
In the process of implementing the embodiments of the present invention, the inventor finds that at least the following defects exist in the background art:
the temporary support is built and the rail longitudinal movement steel box girder is arranged, so that the investment cost is high, the existing resources of the suspension bridge cannot be effectively utilized, the cost is increased and the resources are wasted, and a lifting appliance which can stably connect the steel box girder and is convenient to swing and move in swing and movement construction is lacked.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lifting appliance, aim at solve above-mentioned problem, solve build interim support and set up track longitudinal movement steel case roof beam and have the investment cost big, can not effectively utilize the current resource of suspension bridge, cause cost-push and wasting of resources, and in swinging the construction, lack one kind and can stably connect the steel case roof beam and conveniently swing the hoist of moving the operation.
In order to achieve the above object, the utility model adopts the following technical scheme:
a spreader, comprising:
a spandrel girder;
the fan-shaped plate is provided with at least two connecting holes at one end of the arc;
one end of the sling fork lug conversion head is in pin joint with the connecting hole, and the other end of the sling fork lug conversion head can be detachably connected with the sling fork lug;
one end of the steel strand conversion joint is in pin joint with the connecting hole, and the other end of the steel strand conversion joint can be detachably connected with the steel strand;
one end of the circle center of the sector plate is rotatably connected with the bearing beam.
The sling fork lug conversion head is composed of a sling fork lug connecting plate and a first connecting plate, and the sling fork lug connecting plate is detachably and rotatably connected with the sector plate through the first connecting plate and the connecting hole.
The first connecting plate is in a narrow and long plate shape, grooves are formed in two ends of the first connecting plate, the side face of the first connecting plate is in an I-shaped structure, and through holes used for rotatably connecting the sling fork lug connecting plate and the fan-shaped plate are formed in two ends of the first connecting plate respectively.
The two ends of the steel strand conversion head or the sling fork lug connecting plate are in an anchor head shape; the sling fork lug conversion head is detachably and fixedly connected or detachably and rotatably connected with a sling fork lug from a permanent sling;
the steel strand conversion head is detachably and fixedly connected or detachably and rotatably connected with the end part of the steel strand.
The sling fork lug connecting plate is triangular plate-shaped; the tip parts of three triangular plate-shaped corners of the sling fork lug connecting plate are arc-shaped.
The connecting part of the sling fork lug connecting plate is provided with a pin hole and a pin shaft, and the pin shaft and the pin hole are arranged at the connecting part of the sling fork lug connecting plate and the sling fork lug;
the pin hole is in clearance fit with the pin shaft.
The length direction of the sector plate is the same as that of the bearing beam; one end of the circle center of the sector plate is rotatably connected with the bearing beam along the length direction of the bearing beam.
When the bearing beam bears a heavy object, the rotating connection position of any one connecting hole for transmitting load of the sector plate, the sector plate and the bearing beam is positioned on the gravity center line of the heavy object.
And a second connecting plate is arranged between the bearing beam and the sector plate, and the bearing beam is rotatably connected with the sector plate through the second connecting plate.
The bearing beam and the fan-shaped plate are provided with a sliding seat and a sliding rail, the sliding rail is arranged on the bearing beam along the length direction of the bearing beam, the sliding seat is in sliding connection with the sliding rail, the bearing beam is connected with the fan-shaped plate in a rotating mode through the sliding seat, and the sliding seat is provided with a stopping part used for limiting the sliding of the sliding seat and the sliding rail.
The beneficial effects of the utility model are that, consider the economic nature of tower district steel case roof beam installation and the acceleration of construction progress, solved the unable condition of transporting to the assigned position of water transportation beam section simultaneously. By utilizing the lifting appliance, the lifting appliance can be used for carrying out swinging movement for many times under the coordination of the swinging movement device, and a beam section to be installed is erected in place. The utility model discloses accelerate steel case roof beam construction and installation progress.
Drawings
Fig. 1 is a schematic view of a swing process of a shallow water steel box girder swing construction method according to an embodiment of the present invention;
fig. 2 is an overall structural diagram of a lifting appliance according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the positions of the stranded wire conversion head and the permanent sling during the swinging construction of the sling according to an embodiment of the present invention;
FIG. 4 is a schematic drawing of a trolley pulling in a sling-free area according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating a second swinging process of the cross-cable crane in the construction method for swinging and moving the steel box girder in the shallow water area according to another embodiment of the present invention;
labeled as: 1. a cable-crossing crane; 2. steel strand wires; 3. a first permanent sling; 4. a steel box girder; 5. a first connecting plate; 6. a steel strand conversion head; 7. a sector plate; 8. a second connecting plate; 9. a sling fork lug connecting plate; 10. a spandrel girder; 11. connecting holes; 12. a first hoisting position; 13. a second permanent sling; 14. a pin shaft; 15. a sling fork ear; 16. a winch; 17. a first swing height; 18. a suspension bridge main cable; 19. a second hoisting position; 20. a pulley; 21. a slide carriage.
Detailed Description
It should be noted that, in the embodiments of the present invention, the terms referred to are:
and the first permanent sling is a permanent sling which is arranged on the suspension bridge used for carrying out the swinging and shifting for the first time when the swinging and shifting construction is carried out.
And the second permanent sling is a permanent sling on the suspension bridge used for carrying out the swinging movement for the second time.
And the second lifting position is selected by a field engineer according to the position of the first permanent sling bearing the steel box girder to carry out second swinging movement, the second lifting position is selected according to the requirement that when the steel box girder 4 swings, the vertical direction of the suspension arm or the steel strand along the track of the cable-spanning crane 1 is not more than minus thirty degrees to plus thirty degrees, the angle of the suspension arm of the cable-spanning crane 1 perpendicular to the track is zero degree, and the suspension arm is always parallel to the steel strand.
And the third hoisting position is selected by repeating the operation of selecting the position from the second hoisting position.
The cable-free area, namely the bridge deck of the suspension bridge, is the area without permanent suspension cables at the upper end of the steel box girder in the section where the steel box girder is installed.
The spandrel girder 10 is the main body frame of hoist, is longer box girder, and spandrel girder 10 both ends bottom is fixed with the steel box girder, and the spandrel girder 10 is longer, and the fixed between hoist and the steel box girder is more stable.
Sector plate 7, the primary action is, sector plate 7 sectorial centre of a circle one end is rotated with spandrel girder 10 and is connected, because fan-shaped shape for when sector plate 7 rotates along spandrel girder 10, its turned angle very increases, 7 sectorial circular arc one end of sector plate, the arc length is longer, can set up a plurality of steel strand wires connecting holes that are used for connecting the hoist cable fork ear and stride the cable loop wheel machine, and fan-shaped structure is preferred structure.
The sling fork lug conversion head is used for connecting and fixing the sling fork lugs with the fan-shaped plate 7.
And the steel strand conversion head 6 is used for connecting and fixing the steel strands of the cable-crossing crane and the sector plate 7.
In the figure 1, a, b, c, d and e are different permanent slings, and during construction, the swinging construction can span the permanent slings to swing, so that the swinging times are reduced.
Hereinafter, a hanger according to an embodiment of the present invention will be described in detail through several specific embodiments.
Please refer to fig. 2, which shows a structure diagram of a spreader according to an embodiment of the present invention, the spreader includes:
a spandrel girder 10;
the fan-shaped plate 7 is provided with at least two connecting holes at one end of the arc of the fan-shaped plate 7;
one end of the sling fork lug conversion head is in pin joint with the connecting hole, and the other end of the sling fork lug conversion head can be detachably connected with the sling fork lug;
one end of the steel strand conversion joint 6 is in pin joint with the connecting hole, and the other end of the steel strand conversion joint can be detachably connected with the steel strand;
one end of the circle center of the sector plate 7 is rotatably connected with the bearing beam 10.
In the above embodiment, the sling fork lug conversion head and the steel strand conversion head 6 are respectively pinned to the connection hole 11 at one end of the arc of the sector plate 7, the sector plate 7 is used as a rotary connection member to connect the sling fork lug conversion head and the steel strand conversion head 6 with the bearing beam 10, wherein when the bearing beam 10 bears a heavy object, the rotary connection position of any one of the connection holes 11 of the sector plate 7 for transmitting the load with the sector plate 7 and the bearing beam 10 is on the gravity center line of the heavy object.
Because the sector plates 7 which are rotatably connected with the bearing beams 10 are arranged, when the lifting appliance of the embodiment lifts and swings the steel box beam 4, the steel box beam 4 can be kept stable all the time, and the construction is ensured to be stable and safe.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
the sling fork lug conversion head is composed of a sling fork lug connecting plate 9 and a first connecting plate 5, and the sling fork lug connecting plate 9 is detachably, rotatably and connected with the sector plate 7 through the first connecting plate 5 and the connecting hole 11.
In the above embodiment, hoist cable fork ear crossover sub comprises hoist cable fork ear connecting plate 9 and first connecting plate 5, hoist cable fork ear connecting plate 9 is used for connecting the hoist cable fork ear, first connecting plate 5 is used for reducing hoist cable fork ear connecting plate and the minimum contained angle of steel strand wires crossover sub, first connecting plate 5 connects hoist cable fork ear connecting plate 9 and sector plate 7 as the extension plate, prevent because the great hoist cable fork ear connecting plate 9 of width conflicts with steel strand wires crossover sub 6 each other, through the mode of extension hoist cable fork ear connecting plate 9, the contained angle that produces when making hoist cable fork ear connecting plate 9 and steel strand wires crossover sub 6 paste reduces, first connecting plate 5 can effectually reduce the size of hoist cable fork ear connecting plate 9 and sector plate 7, avoid hoist cable fork ear connecting plate 9 and hoist cable ear crossover sub conflict in the space, can satisfy the wide-angle within 24 degrees and swing the construction.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
the first connecting plate 5 is in a narrow and long plate shape, grooves are formed in two ends of the first connecting plate 5, the side face of the first connecting plate 5 is in an I-shaped structure, and through holes used for rotatably connecting the sling fork lug connecting plate and the fan-shaped plate are formed in two ends of the first connecting plate 5 respectively.
The tips of three triangular plate-shaped corners of the sling fork lug connecting plate 9 are arc-shaped;
in the above embodiment, the first connecting plate 5 is used as an extension piece, which is as narrow as possible under the condition of satisfying the necessary load bearing condition, and is also used for connecting the suspension cable lug connecting plate and the fan-shaped plate, so that the first connecting plate 5 is of an "i" type structure, and the two side openings of the i shape are used for clamping the suspension cable lug connecting plate and the fan-shaped plate, so as to ensure the stability of the connection of the suspension cable lug connecting plate and the fan-shaped plate during swinging and moving construction.
Preferably, the tip of the triangular plate-shaped three corners of the sling fork ear connection plate 9 is arc-shaped, which can prevent the injury to the steel strand 2 or the constructor due to the sharp tip.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
the connecting part of the sling fork lug connecting plate 9 is provided with a pin hole and a pin shaft 14, and the pin shaft 14 and the pin hole are arranged at the connecting part of the sling fork lug connecting plate 9 and the sling fork lug 15;
the pin hole is in clearance fit with the pin shaft 14;
in the above embodiment, the connection part of the sling fork lug connecting plate 9 is provided with the pin hole and the pin 14, and the connection is realized through the pin, so that the convenience of disassembly and assembly during construction can be simplified.
Preferably, the pin hole and the pin 14 are in clearance fit, the preferred clearance of the clearance fit is 0.2mm, and the clearance can also be 0.1mm-0.3 mm.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
the length direction of the sector plate 7 is the same as the length direction of the bearing beam 10, and one end of the circle center of the sector plate 7 is rotatably connected with the bearing beam 10 along the length direction of the bearing beam.
In the above embodiment, the length directions of the sector plates 7 and the bearing beam 10 are the same, so that when the lifting appliance carries the steel box beam 4, the rotation of the sector plates 7 does not enable the steel box beam 4 to swing left and right, and the length directions of the sector plates 7 and the bearing beam 10 are the same, so that the steel box beam 4 is always in a stable horizontal direction, and the construction is safer and more stable.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
two ends of the steel strand conversion head 6 or the sling fork lug connecting plate 9 are in an anchor head shape;
in the above embodiment, the steel strand conversion head 6 or the sling fork lug connecting plate 9 is in the shape of an anchor head, and the anchor head is widely applied in the whole industry, and has a stable structure, firmness and durability.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
the sling fork lug conversion head is detachably and fixedly connected or detachably and rotatably connected with a sling fork lug 15 from a permanent sling;
the steel strand conversion head 6 is detachably and fixedly connected or detachably and rotatably connected with the end part of the steel strand 2;
in the above embodiment, the joints of the sling fork lug conversion head and the steel strand conversion head 6 are detachably connected, so that the connection is firm;
preferably, the junction of hoist cable fork ear crossover sub and steel strand wires crossover sub 6 is all established to dismantling to rotate and is connected, rotates to connect and makes hoist cable fork ear crossover sub and steel strand wires crossover sub 6 when swinging steel case roof beam 4, and permanent hoist cable and steel strand wires are gone up when the atress, bear straight line pulling force all the time on 2, and permanent hoist cable and steel strand wires 2 are difficult for the fracture, avoid the occurence of failure.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
when the bearing beam 10 bears a heavy object, the rotating connection position of any one connecting hole 11 used for transmitting load of the sector plate 7 and the bearing beam 10 is positioned on the gravity center line of the heavy object.
In the above embodiment, due to the advantage of the shape of the sector plate 7, when one end of the circle center of the sector plate 7 is connected to the bearing beam 10, the sector plate 7 flexibly rotates on the bearing beam 10, in this embodiment, to ensure the construction safety, when the bearing beam 10 bears a heavy object, the rotating connection position of any one of the connection holes 11 of the sector plate 7, which is used for transmitting load, with the sector plate 7 and the bearing beam 10 is located on the gravity center line of the heavy object.
Further, as shown in fig. 2, it shows another embodiment of the spreader of the present invention, further comprising:
a second connecting plate 8 is arranged between the bearing beam 10 and the sector plate 7, and the bearing beam 10 is rotatably connected with the sector plate 7 through the second connecting plate 8;
a sliding seat and a sliding rail are arranged between the bearing beam 10 and the fan-shaped plate 7, the sliding rail is arranged on the bearing beam 10 along the length direction of the bearing beam, the sliding seat is in sliding connection with the sliding rail, the bearing beam 10 is in rotating connection with the fan-shaped plate 7 through the sliding seat, and a stopping part used for limiting the sliding seat and the sliding rail to slide mutually is arranged on the sliding seat.
In the embodiment, the bearing beam 10 and the sector plate 7 are rotationally connected through the second connecting plate 8, so that when the bearing beam 10 bears the steel box girder 4, the gravity center of the steel box girder 4 can be adjusted to be stable through self weight;
the sliding base and the sliding rail between the bearing beam 10 and the sector plate 7 enable the sector plate 7 to move along the length direction of the bearing beam 10, a constructor can adjust the horizontal stability of the steel box girder 4 borne by the bearing beam 10 by adjusting the position between the sector plate 7 and the bearing beam 10, and the stopping part is used for fixing the relative position between the sliding base and the sliding rail, so that the relative position between the sector plate 7 and the bearing beam 10 is fixed, and stable construction is stably carried out.
Referring to fig. 1, a swing process diagram of a construction method for a shallow water area steel box girder swing construction scheme according to an embodiment of the present invention is shown, and the construction method for shallow water area steel box girder swing includes the following steps:
step 1: the cross-cable crane 1 travels to a first hoisting position, and a sling is lowered to be installed on a steel box girder 4 on a barge positioned right below the cross-cable crane;
step 2: the cross-cable crane 1 lifts the steel box beam 4 to a first swinging height 17 of a first permanent sling 3, and mounts the first permanent sling 3 on the lifting appliance, wherein the first swinging height 17 is a position where a sling fork lug 15 of the first permanent sling 3 can be mounted on the lifting appliance, and the first permanent sling 3 is a permanent sling which performs first swinging;
and step 3: the span cable crane 1 gradually reduces the height of the lifting appliance, and the fixed end above the first permanent lifting cable 3 is moved to the position where the first permanent lifting cable 3 completely bears the weight of the steel box girder 4 as the original point.
In the embodiment, the barge can not transport the steel box girder to the lifting position in the shoal area or the shallow river bed, and the permanent suspension cable on the suspension bridge is used for swinging and moving the steel box girder 4.
Firstly, a steel box girder 4 is conveyed to the position right below the lifting position of a cable-crossing crane 1 by a barge in a river channel, the position which is the closest to the position where the steel box girder 4 can be installed and can be driven by a generally selected barge is selected to be right below the lifting position of the cable-crossing crane 1, the selected barge is driven to a selected place, the cable-crossing crane 1 is driven to the lifting position along a main cable 18 of a suspension bridge, a lifting appliance is placed on the cable-crossing crane 1 and is installed on the steel box girder 4 on the barge, the steel box girder 4 is lifted by the cable-crossing crane 1 after being fixed, the steel box girder 4 is lifted to a first swinging height 17, and a first permanent lifting rope 3 and the lifting appliance are installed.
Wherein the first swinging height 17 can be any height at which the first permanent slings 3 can reach and be mounted to the spreader in the height at which the cable-spanning crane 1 lifts the steel box girder 4.
After the first permanent sling 3 and the lifting appliance are installed, the steel strand 2 of the cable-crossing crane 1 is gradually released, the steel box girder 4 slowly descends along with the lifting appliance, the steel box girder 4 moves to the lower end of the first permanent sling 3 along an arc path taking the first permanent sling 3 as a radius, and the first permanent sling 3 completely bears the whole weight of the steel box girder 4 to complete the first swinging construction.
Further, referring to fig. 1, it shows another embodiment of the shallow water steel box girder swing construction method of the present invention, further comprising:
step 4, releasing a certain length of steel strand 2 by the cable-crossing crane 1 or detaching the steel box girder 4 and the steel strand 2 of the cable-crossing crane 1 from the steel box girder 4, wherein the steel strand 2 released by the certain length is allowed to travel from a first lifting position to a second lifting position 19 along the main cable 18 of the suspension bridge under the condition that the steel strand of the cable-crossing crane 1 is fixed with a lifting appliance;
and 5: the cross-cable crane 1 travels from the first lifting position to a second lifting position 19, wherein the second lifting position 19 is a position on the main cable where the cross-cable crane 1 travels along the main cable 18 of the suspension bridge and performs second swinging movement;
step 6: the span cable crane 1 lifts the steel box beam 4 to a second swinging height of a second permanent sling 13, then the second permanent sling 13 is installed on the sling, and the first permanent sling 3 is removed, wherein the second swinging height is a position where the span cable crane 1 can completely bear the weight of the steel box beam 4, a sling fork lug 15 of the second permanent sling 13 can be installed on the sling on the steel box beam 4, and the second permanent sling 13 is a permanent sling for carrying out second swinging;
step 7: and (3) gradually reducing the height of the lifting appliance by the cross-cable lifting machine 1, swinging and moving the upper fixed end of the second permanent lifting cable 13 to a position where the second permanent lifting cable 13 completely bears the weight of the steel box girder 4 by using the upper fixed end as an original point, finishing swinging and moving construction when the steel box girder 4 reaches a preset position after the step (7), and continuously repeating the step (4) to the step (7) if the steel box girder 4 does not reach the preset position after the step (6).
In the above embodiment, after the steel box girder 4 completes the first swing construction, if the steel box girder does not reach the predetermined position, the second swing is performed, and when the second swing is performed, the cable-crossing crane 1 needs to move to the predetermined position first, and when the cable-crossing crane 1 moves, the steel strand 2 of a certain length needs to be released or the steel box girder 4 and the steel strand 2 of the cable-crossing crane 1 need to be detached from the steel box girder 4, so that the cable-crossing crane 1 does not pull the steel box girder 4 when moving, thereby ensuring the safety of the construction and the stability of the steel box girder 4, and then the cable-crossing crane 1 travels along the suspension bridge main cable 18 to the second lifting position 19, and the second lifting position 19 may be a position along the top of the suspension bridge main cable 18 at the top of the steel box girder 4 completing the first swing construction;
the second hoisting position 19 where the cross-cable crane 1 runs can also be a position which is positioned at the top of the steel box girder 4 which finishes the first swinging construction and continues to move forward along the main cable 18 of the suspension bridge; it is also possible that the top end of the second permanent sling for the second swinging is located on the main cable or on the main cable further forward.
After the cross-cable crane 1 lifts the steel box girder 4 at the lifting position and carries out the first swinging construction, the steel box girder 4 bears the weight of the whole first permanent sling 3, the cross-cable crane 1 releases the steel strand 2 with a certain length or the steel box girder 4 and the steel strand 2 of the cross-cable crane 1 are detached from the steel box girder 4, the cross-cable crane 1 travels from the first lifting position 12 to the second lifting position 19, the second lifting position 19 can also be positioned at the top of the second permanent sling 13, during the site construction, the second lifting position 19 can be positioned at the front side or the rear side of the top of the second permanent sling 13 on the premise of meeting the safe construction of the cross-cable crane 1, the cross-cable crane 1 can firstly swing the steel box girder 4 upwards until the steel strand 2 of the cross-cable crane 1 bears the whole steel box girder 4 and lift the steel box girder 4 to the second swinging height, and the second swinging height is the whole permanent sling 4 bearing the weight of the steel box girder 4 of the cross-cable crane 1 and the weight of the second permanent sling 13 15 can be mounted to the steel box girder 4 in the position of the spreader. And gradually reducing the height of the lifting appliance by the cross-cable crane 1 until the second permanent lifting cables 13 completely bear the weight of the steel box girder 4, and finishing the second swinging construction.
In the above embodiment, as shown in fig. 1, if the second lifting position 19 where the cable-crossing crane 1 travels can be any position before the position of the first permanent sling 3 after the first swinging construction is completed, in the figure, any cable-crossing crane 1 at the intersection point of the first permanent sling 3 and the suspension bridge main cable 18 to the left can travel, and because the cable-crossing crane 1 is located at the front end of the steel box girder 4 in the horizontal direction, the cable-crossing crane 1 can swing the steel box girder 4 upward to construct and reach the second swinging height, so that two steps of work are completed at one time of construction, that is, the cable-crossing crane 1 swings forward by a certain distance, and the steel box girder 4 is lifted to the second swinging height, thereby saving construction steps and improving construction efficiency.
When the cable-crossing crane 1 lifts the steel box girder 4, the included angle between the steel strand 2 of the cable-crossing crane 1 and the main cable 18 of the suspension bridge cannot be more than plus or minus thirty degrees, wherein the vertical direction of the main cable 18 of the suspension bridge is the initial angle, namely zero degree.
To sum up, if the steel box girder 4 reaches the predetermined position after the second swing construction is completed, the construction is completed, and if the predetermined construction position is reached, the swing construction according to the above embodiment needs to be continued until the steel box girder 4 reaches the target position, so that the swing construction operation of the steel box girder 4 is completed.
Further, as shown in fig. 3, it shows another embodiment of the shallow water steel box girder swing construction method of the present invention, further comprising:
step 3.1, after the first permanent sling 3 completely bears the weight of the steel box girder 4, the end part of the steel strand 2 of the cable-crossing crane 1 is disassembled and assembled from the rear end of the first permanent sling 3 along the swinging direction of the steel box girder to the front end of the first permanent sling 3;
considering that the steel strand 2 and the second permanent sling 13 cross each other when the second swinging construction is performed, and the construction efficiency is more long when the cable-crossing crane 1 can move forward and meet the safety angle of the cable-crossing crane 1 during the construction, after the cable-crossing crane 1 performs the swinging construction every time, the end of the steel strand 2 of the cable-crossing crane 1 is disassembled and assembled from the rear end of the first permanent sling 3 along the swinging direction of the steel box girder to the front end of the first permanent sling 3, the operation can increase the swinging efficiency after the second swinging, so that the swinging distance is increased every time, and the swinging times are reduced.
Further, as shown in fig. 1, it shows another embodiment of the shallow water steel box girder swing construction method of the present invention, further comprising:
and 4, step 4: the cross-cable crane 1 travels to a position right above the first permanent sling 3, and lifts the steel box girder 4 to a second swinging height of a second permanent sling 13, and after the first permanent sling 3 is removed, the second permanent sling 13 is installed;
and 5: and (3) gradually reducing the height of the lifting appliance by the cross-cable lifting machine 1 until the second permanent lifting cables 13 completely bear the weight of the steel box beam 4, finishing the swinging construction when the steel box beam 4 reaches a preset position after the step 5, and if the steel box beam 4 does not reach the preset position after the step 5, walking the cross-cable lifting machine 1 to a position right above the second permanent lifting cables 13 and repeating the steps from the step 4 to the step 5.
In the above embodiment, each swing-shift construction allows the cable-crossing crane 1 to be located at the top of the steel box girder 4 after the previous swing-shift construction is completed, each time the cable-crossing crane 1 lifts the steel box girder 4 to the swing-shift height of the permanent sling of the next swing-shift construction, and the whole swing-shift construction is completed by repeating the above operations. In this embodiment, the operation of swinging can only need dismantle the installation next permanent hoist cable can without removing the connection of striding cable loop wheel machine 1 and hoist at every turn, in this embodiment, strides cable loop wheel machine 1 and all is equivalent to perpendicular lifting at every turn, and its operation is succinct convenient, construction safety.
Further, as shown in fig. 1 or fig. 4, it shows another embodiment of the construction method for swinging and moving the steel box girder in shallow water, further comprising:
and 8: connecting a winch 16 on a tower column with a temporary traction lug plate of a steel box girder 4 in a ropeless area through a pulley 20 group, gradually winding a rope through the winch 16 on the tower column after the steel box girder 4 in the ropeless area reaches a preset position, gradually releasing a steel strand 2 through a cable-crossing crane 1, and moving the steel box girder 4 in the ropeless area to a specified position;
and 9, the cross-cable crane 1 gradually swings and moves the steel box beams 4 with the permanent suspension cables to a preset position, and adjusts the steel box beams 4 to an assembly position for fixed assembly.
In the above embodiment, when the steel box girder 4 in the ropeless area is installed temporarily, because the upper end of the steel box girder 4 in the ropeless area has no permanent sling, an auxiliary tool needs to be used for construction of the steel box girder 4 in the area during construction, and when the ropeless area is close to the permanent sling, the winch 16 on the tower column is matched with the cable-crossing crane 1, when the steel box girder 4 is subjected to the last swing construction and is positioned at the edge of the ropeless area, the winch 16 on the tower column is connected with the temporary traction lug plate of the steel box girder 4 through the pulley 17 set, the winch 16 on the tower column is used for gradually withdrawing the cable, and the cable-crossing crane 1 gradually releases the steel strand 2 to move the steel box girder 4 in the ropeless area to a specified position, so as to complete construction of the ropeless area.
Please refer to fig. 1 or 5, which shows a swing process diagram of a shallow water area steel box girder swing construction system according to an embodiment of the present invention, the shallow water area steel box girder swing construction system includes:
a cross-cable crane 1;
the main cable of the suspension bridge is provided with a cable-crossing crane 1;
a first permanent sling fixed to the suspension bridge main cable;
the cable-crossing crane 1 uses the above-mentioned one, wherein a spreader, the cable-crossing crane 1, the main cable of the suspension bridge and the first permanent sling are used in the above-mentioned one shallow water steel box girder swinging construction method.
In the above embodiment, by integrating the existing resources of the suspension bridge, under the condition of saving the most resources, the steel box girder 4 is swung to the construction position, the barge transports the steel box girder 4 in the river channel to the position right below the lifting position of the cable-crossing crane 1, where the barge can generally be selected to run, is closest to the position where the steel box girder 4 is installed, the barge is selected to run to the selected place after the barge is selected, the cable-crossing crane 1 runs to the lifting position along the main cable 18 of the suspension bridge, the cable-crossing crane 1 lowers the sling, the sling is installed on the steel box girder 4 on the barge, the cable-crossing crane 1 is fixed to hoist the steel box girder 4, the steel box girder 4 is hoisted to the first swing height 17, and the first permanent sling 3 is installed on the sling. After the first permanent sling 3 and the lifting appliance are installed, the steel strand 2 of the cable-crossing crane 1 is gradually released, the steel box girder 4 slowly descends along with the lifting appliance, the steel box girder 4 moves to the lower end of the first permanent sling 3 along an arc path taking the first permanent sling 3 as a radius, and the first permanent sling 3 completely bears the whole weight of the steel box girder 4, so that the swinging construction is completed.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the present embodiment are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions related to "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Technical solutions between various embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (10)
1. A spreader, comprising:
a load-bearing beam (10);
the fan-shaped plate (7), the arc one end of the fan-shaped plate (7) has at least two attachment holes;
one end of the sling fork lug conversion head is in pin joint with the connecting hole, and the other end of the sling fork lug conversion head can be detachably connected with the sling fork lug;
one end of the steel strand conversion joint (6) is in pin joint with the connecting hole, and the other end of the steel strand conversion joint can be detachably connected with the steel strand;
one end of the circle center of the sector plate (7) is rotationally connected with the bearing beam (10).
2. The sling according to claim 1, wherein the sling fork lug adapter consists of a sling fork lug connection plate (9) and a first connection plate (5), and the sling fork lug connection plate (9) is detachably and rotatably connected with the sector plate (7) through the first connection plate (5) and the connection hole.
3. The sling according to claim 2, wherein the first connecting plate (5) is in the shape of a narrow and long plate, the two ends of the first connecting plate (5) are provided with grooves, the side surface of the first connecting plate (5) is in an I-shaped structure, and the two ends of the first connecting plate (5) are respectively provided with a through hole for rotatably connecting the sling fork lug connecting plate and the sector plate.
4. The spreader according to claim 2, wherein the ends of the strand transition head (6) or the sling fork lug connection plate (9) are anchor-head shaped; the sling fork lug conversion head is detachably and fixedly connected or detachably and rotatably connected with a sling fork lug from a permanent sling;
the steel strand conversion head (6) is detachably and fixedly connected or detachably and rotatably connected with the end part of the steel strand.
5. A spreader according to claim 2, wherein the sling ear attachment plate (9) is triangular plate-shaped; the tips of three triangular plate-shaped corners of the sling fork lug connecting plate (9) are arc-shaped.
6. The sling according to claim 5, wherein the connection of the sling fork lug connection plate (9) has a pin hole and a pin shaft, the pin hole and the pin shaft being provided at the connection of the sling fork lug connection plate (9) and the sling fork lug;
the pin hole is in clearance fit with the pin shaft.
7. A spreader according to claim 1, characterised in that the length direction of the sector plates (7) is co-directional with the length direction of the load beam (10); one end of the circle center of the sector plate (7) is rotatably connected with the bearing beam (10) along the length direction of the bearing beam.
8. A spreader according to claim 1, wherein when the load-bearing beam (10) is carrying a heavy load, the connection of any one of said attachment holes of the sector plate (7) for transferring load to the rotation of the sector plate (7) and the load-bearing beam (10) is located on the gravity center line of the heavy load.
9. The spreader according to claim 1, wherein a second connecting plate (8) is provided between the load beam (10) and the sector plate (7), and the load beam (10) is rotatably connected to the sector plate (7) via the second connecting plate (8).
10. The spreader according to claim 9, wherein a slide and a slide are provided between the load beam (10) and the sector plate (7), the slide being provided on the load beam (10) along the length of the load beam, the slide and the slide being slidably connected, the load beam (10) being rotatably connected to the sector plate (7) via the slide, the slide being provided with a stop for limiting the sliding movement of the slide and the slide relative to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920122900.1U CN209922694U (en) | 2019-01-24 | 2019-01-24 | Lifting appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920122900.1U CN209922694U (en) | 2019-01-24 | 2019-01-24 | Lifting appliance |
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| CN209922694U true CN209922694U (en) | 2020-01-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445428A (en) * | 2021-07-15 | 2021-09-28 | 中交一公局集团有限公司 | Transfer device for air continuous movement of large-sized member and construction method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445428A (en) * | 2021-07-15 | 2021-09-28 | 中交一公局集团有限公司 | Transfer device for air continuous movement of large-sized member and construction method |
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