CN113003387A - Double-layer lifting appliance for lifting caisson and lifting method thereof - Google Patents
Double-layer lifting appliance for lifting caisson and lifting method thereof Download PDFInfo
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- CN113003387A CN113003387A CN202110373250.XA CN202110373250A CN113003387A CN 113003387 A CN113003387 A CN 113003387A CN 202110373250 A CN202110373250 A CN 202110373250A CN 113003387 A CN113003387 A CN 113003387A
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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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Abstract
The invention relates to the technical field of lifting appliances, in particular to a double-layer lifting appliance for lifting a caisson and a lifting method thereof, wherein the double-layer lifting appliance comprises a lifting frame and two first lifting rods arranged in a mirror image manner, wherein two ends of each first lifting rod are respectively provided with a first lifting rope used for being connected with a lifting hook of a lifting device, and two ends of each first lifting rod are respectively connected with the lifting frame through at least more than two second lifting ropes; more than two third lifting ropes are arranged on two opposite sides of the lifting frame at intervals along the symmetrical center line direction of the two opposite sides of the lifting frame connected with the third lifting ropes, and the distance between any two adjacent third lifting ropes is variable; the problem of current gallows among the prior art can not hoist the caisson of multiple specification, and current gallows structure is complicated, with higher costs and the repairability is low is solved, first jib and lift by crane the frame and can make corresponding change because of the quantity of caisson lifting point, ensure that every caisson lifting point atress is even, and then can hoist the caisson of multiple specification.
Description
Technical Field
The invention relates to the technical field of lifting appliances, in particular to a double-layer lifting appliance for lifting a caisson and a lifting method thereof.
Background
The caisson structure has the advantages of small underwater engineering quantity, high construction speed, good stability and the like, is usually used in engineering construction such as wharfs, bridge foundations and the like and is limited by construction conditions, storage sites and the like, most of the caissons are manufactured in prefabricating plants and then transported to a site for installation through water; the caisson prefabrication and installation scheme adopts factory and standardized manufacturing, is favorable for controlling the quality, safety and cost of caisson production, can effectively avoid the influence of adverse factors such as monsoon, typhoon, ocean current and the like, and is widely applied to coastal wharf engineering, island filling engineering, trestle engineering, revetment and other engineering.
The concrete caisson is a structure with thinner wall thickness, in order to ensure that the caisson wall is not damaged in hoisting, some auxiliary tools are needed for hoisting, namely a hoisting hanger, the stress direction of the caisson wall is changed by the hoisting hanger, so that the caisson wall is not influenced by lateral pressure and only is influenced by vertical force; the hoisting hangers commonly used at present are:
1. single-layer hanger: the single-layer hanger is the most common scheme, if the weight of the caisson is large, a plurality of hanging points need to be arranged, but for the large caisson with 8 hanging points, the stress of each hanging point is difficult to be uniform, and the safety is poor. If the caisson type of the project is more, a plurality of hanging brackets are needed;
2. movable gallows through assembly pulley control: the structure is relatively complex, the reliability is reduced under the condition that the pulley block is high in use strength, the manufacturing cost is high, the hoisting requirements of heavy caissons of multiple models are met, and the caisson is complex to manufacture and difficult to repair damage.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a double-layer lifting appliance for lifting a caisson and a lifting method thereof, which solve the problems that the existing lifting appliance in the prior art can not lift caissons with various specifications, and the existing lifting appliance is complex in structure, high in cost and low in repairability.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the double-layer lifting appliance comprises a lifting frame and two first lifting rods arranged in a mirror image manner, wherein two ends of each first lifting rod are respectively provided with a first lifting rope used for being connected with a lifting hook of a lifting device, and two ends of each first lifting rod are connected with the lifting frame through at least more than two second lifting ropes;
more than two third lifting ropes are arranged on two opposite sides of the lifting frame, the more than two third lifting ropes are arranged at intervals along the direction of the symmetrical center lines of the two opposite sides of the lifting frame, which are connected with the third lifting ropes, and the distance between any two adjacent third lifting ropes is variable.
Further, the opposite sides of the hoisting frame connected with the second lifting rope are connected with the third lifting rope.
Further, the number of the second lifting ropes is two.
Furthermore, the hoisting frame comprises two frame cross beams arranged in a mirror image mode, a plurality of frame support beams are arranged between the two frame cross beams at intervals along the length direction of the frame cross beams, the two ends of the first suspender are respectively connected with the two frame cross beams through second lifting ropes, and the third lifting rope is connected with the frame cross beams.
Furthermore, the number of the frame support beams is four, and the joint of each frame support beam and the frame cross beam corresponds to one third lifting rope.
Furthermore, the frame cross beam and the frame support beam are of seamless steel tube structures.
Further, the first suspender is of an ERW steel pipe structure, the first lifting rope, the second lifting rope and the third lifting rope are all metal core steel wire ropes, and the lifting frame is made of low-carbon alloy steel.
Further, the first boom is made of APLX70, the first lifting rope, the second lifting rope and the third lifting rope are all steel core steel wire ropes, and the lifting frame is made of Q345B.
In a second aspect, the present disclosure further provides a hoisting method using the double-layer sling for hoisting a caisson, specifically including the following steps:
s1, determining the number M of caisson lifting points according to the number of caisson bins to be lifted and the weight of the caisson to be lifted;
s2, determining the number of the third lifting ropes according to the number M of the lifting points of the caisson, and determining the distance between any two adjacent third lifting ropes according to the distance between any two adjacent lifting points of the caisson on the same side of the caisson;
s3, connecting the first lifting rope with a lifting hook of a lifting device, and moving the double-layer lifting appliance upwards for a first preset distance along the vertical direction;
s4, judging whether the center line of the third lifting rope is vertical to the lifting frame, if so, entering the step S5; otherwise, adjusting the third lifting rope until the central line of the third lifting rope is vertical to the lifting frame, and then entering the step S5;
s5, after the double-layer lifting appliance is moved to a position above the position of the caisson to be lifted, the double-layer lifting appliance is controlled to move downwards along the vertical direction, so that one end, far away from the lifting frame, of the third lifting rope is located in a lifting connection area connected with the lifting point of the caisson;
s6, connecting the third lifting rope with a caisson lifting point;
s7, enabling the third lifting rope to be in a stretched state, judging whether the third lifting rope is vertical to the horizontal plane, and if so, entering the step S8; otherwise, adjusting the third lifting rope until the third lifting rope is vertical to the horizontal plane, and then entering step S8;
and S8, hoisting the caisson to a preset position through a double-layer lifting appliance.
Further, the hoisting connection region in step S5 is a hemispherical region with the caisson hoisting point as the center and the radius R.
The invention has the beneficial effects that:
1. according to the invention, the first layer of hanging bracket is formed by the two first hanging rods, and the two first hanging rods and the lifting frame form a double-layer hanging bracket structure, the first hanging rods and the lifting frame can be correspondingly changed according to the number of the lifting points of the caisson, so that the stress of each lifting point of the caisson is ensured to be uniform, and the caisson with heavier weight can be lifted, which cannot be safely realized by a single-layer hanging bracket;
2. the number of the third lifting ropes on the same side of the lifting frame is variable, and the number of the third lifting ropes can be increased or decreased according to the weight of the caisson, so that the heavier caisson is lifted, and the application range of the double-layer lifting appliance is expanded;
3. the lifting frame is arranged to change the number of the third lifting ropes, so that the caissons with different specifications can be lifted.
Drawings
Fig. 1 is a front view of a double-layered hanger for caisson hoisting.
Fig. 2 is a left side view of a double-deck spreader for caisson hoisting.
FIG. 3 is a schematic view of a lifting frame.
Wherein, 1, a first suspender; 2. a first lifting rope; 3. hoisting the frame; 31. a frame cross member; 32. a frame corbel; 4. a second lifting rope; 5. and a third lifting rope.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1
As shown in fig. 1 and 2, the scheme provides a double-layer lifting appliance for lifting a caisson, which comprises a lifting frame 3 and two first lifting rods 1 arranged in a mirror image manner, wherein both ends of each first lifting rod 1 are provided with first lifting ropes 2 used for being connected with a lifting hook of a lifting device, and both ends of each first lifting rod 1 are connected with the lifting frame 3 through at least two second lifting ropes 4;
the two opposite sides of the lifting frame 3 are provided with more than two third lifting ropes 5, the more than two third lifting ropes 5 are arranged at intervals along the symmetrical center line direction of the two opposite sides of the lifting frame 3 connected with the third lifting ropes 5, and the distance between any two adjacent third lifting ropes 5 is variable.
In the embodiment, the number of the third lifting ropes 5 on the same side of the lifting frame 3 is determined according to the number of caisson cabins and the weight of the caisson, a first layer lifting frame of a double-layer lifting appliance is formed by the two first lifting rods 1 and is connected with the lifting frame 3 through the second lifting rope 4, so that a double-layer hanger structure is realized, the caisson with heavier weight can be lifted, the second lifting rods 2 and the lifting frame 3 form a pyramid structure through the second lifting ropes 4, the caissons with different specifications can be lifted, and the number of caissons is reduced; in order to adjust the distance between two adjacent third lifting ropes 5, the third lifting ropes 5 can be sleeved on the lifting frame 3, and a limiting mechanism for limiting the movement of the third lifting ropes 5 is arranged on the lifting frame 3, for example, the limiting mechanism can fix the third lifting ropes 5 by nuts or pressing plates to prevent the third lifting ropes 5 from moving axially along the lifting frame 3 and prevent the third lifting ropes 5 from rotating, so that the center lines of the third lifting ropes 5 are perpendicular to the horizontal plane.
Specifically, in this embodiment, the opposite sides of the connection between the lifting frame 3 and the second lifting rope 4 are connected with the third lifting rope 5, and the acting force applied by the caisson to the lifting tool can be directly transmitted to the first suspender 1 through the second lifting rope 4, so that the lifting tool is uniformly stressed, and the heavy caisson can be lifted; the number of the second lifting ropes 4 is preferably two, so that the hoisting requirements of most caissons can be met, and the manufacturing cost of the double-layer lifting appliance is reduced as much as possible.
As shown in fig. 3, the hoisting frame 3 includes two frame beams 31 arranged in a mirror image manner, a plurality of frame support beams 32 are arranged between the two frame beams 31 at intervals along the length direction of the frame beams 31, two ends of the first suspender 1 are respectively connected with the two frame beams 31 through the second lifting rope 4, and the third lifting rope 5 is connected with the frame beams 31. The frame beams 31 and the frame support beams 32 form a frame type structure, so that the hoisting requirement is met, and the weight of the lifting appliance is reduced, so that the safety of the lifting appliance is ensured.
The frame cross beam 31 and the frame support beam 32 are of seamless steel tube structures, so that the strength requirement is met, the material can be saved, and the circular cross section bears the internal or external radial pressure, so that the stress is uniform and the circular cross section is safe.
In this embodiment, when hoisting 9 to 12 bins's caisson, the quantity of frame corbel 32 is four, and every frame corbel 32 corresponds a third lifting rope 5 with the junction of frame crossbeam 31, and the caisson effort that third lifting rope 5 bore can direct action on second lifting rope 4 through frame crossbeam 31 to ensure the stability of hoist structure, prolong its life.
The first suspender 1 is of an ERW steel pipe structure, the toughness and the flattening resistance of the ERW steel pipe are excellent, the structure is firm, the strength is good, the use can be carried out for a long time, and the use is safer; the first lifting rope 2, the second lifting rope 4 and the third lifting rope 5 are all metal core steel wire ropes, and the metal core steel wire ropes have the advantages of long service life, relatively high breaking force, relatively low softness and relatively good safety performance in an allowable range; the hoisting frame 3 is made of low-carbon alloy steel, and the low-carbon alloy steel is beneficial to strength control; specifically, the first boom 1 is made of APLX70, the first lifting rope 2, the second lifting rope 4, and the third lifting rope 5 are all steel core steel cables, and the lifting frame 3 is made of Q345B.
Example 2
The scheme also provides a hoisting method of the double-layer hoisting tool for hoisting the caisson, which specifically comprises the following steps:
s1, determining the number M of caisson lifting points according to the number of caisson bins to be lifted and the weight of the caisson to be lifted;
s2, determining the number of the third lifting ropes 5 according to the number M of the caisson lifting points, and determining the distance between any two adjacent third lifting ropes 5 according to the distance between any two adjacent caisson lifting points on the same side of the caisson;
s3, connecting the first lifting rope 2 with a lifting hook of a lifting device, and moving the double-layer lifting appliance upwards for a first preset distance in the vertical direction;
s4, judging whether the center line of the third lifting rope 5 is vertical to the lifting frame 3, if so, entering the step S5; otherwise, adjusting the third lifting rope 5 until the center line of the third lifting rope 5 is perpendicular to the lifting frame 3, and then entering step S5;
s5, after the double-layer lifting appliance is moved to a position above the position of the caisson to be lifted, the double-layer lifting appliance is controlled to move downwards along the vertical direction, so that one end, far away from the lifting frame 3, of the third lifting rope 5 is located in a lifting connection area connected with a lifting point of the caisson;
s6, connecting the third lifting rope 5 with a caisson lifting point;
s7, enabling the third lifting rope 5 to be in a stretched state, judging whether the third lifting rope 5 is vertical to the horizontal plane, and if so, entering the step S8; otherwise, adjusting the third lifting rope 5 until the third lifting rope 5 is vertical to the horizontal plane, and then entering step S8;
and S8, hoisting the caisson to a preset position through a double-layer lifting appliance.
Specifically, the third lifting rope 5 can be preliminarily brought into a predetermined state by the step S4 to reduce the working time of the step S7; by straightening the third lifting rope 5 in step S7, it is ensured that the caisson wall is not subjected to lateral pressure but only to vertical force.
The hoisting connection area in step S5 is a hemispherical area with the caisson hoisting point as the center of circle and the radius of R, and by setting the hoisting connection area, the third lifting rope 5 can be quickly connected to the caisson, thereby improving the work efficiency.
Claims (10)
1. A double-layer lifting appliance for lifting a caisson comprises a lifting frame (3) and two first lifting rods (1) arranged in a mirror image mode, wherein first lifting ropes (2) used for being connected with lifting hooks of a lifting device are arranged at two ends of each first lifting rod (1), and two ends of each first lifting rod (1) are connected with the lifting frame (3) through at least two second lifting ropes (4);
the lifting frame is characterized in that more than two third lifting ropes (5) are arranged on two opposite sides of the lifting frame (3), the more than two third lifting ropes (5) are arranged at intervals along the direction of symmetrical center lines of two opposite sides, connected with the third lifting ropes (5), of the lifting frame (3), and the distance between any two adjacent third lifting ropes (5) is variable.
2. The double-deck spreader for caisson hoisting according to claim 1, wherein the opposite sides of the hoisting frame (3) to which the second hoisting ropes (4) are connected to the third hoisting ropes (5).
3. The double-deck spreader for caisson hoisting according to claim 1, wherein the number of the second lifting ropes (4) is two.
4. The double-layer lifting appliance for lifting the caisson according to claim 1, wherein the lifting frame (3) comprises two frame cross beams (31) arranged in a mirror image manner, a plurality of frame support beams (32) are arranged between the two frame cross beams (31) at intervals along the length direction of the frame cross beams (31), two ends of the first lifting rod (1) are respectively connected with the two frame cross beams (31) through the second lifting ropes (4), and the third lifting ropes (5) are connected with the frame cross beams (31).
5. The double-layer lifting appliance for lifting the caisson according to claim 4, wherein the number of the frame corbels (32) is four, and the joint of each frame corbel (32) and the frame cross beam (31) corresponds to one third lifting rope (5).
6. The double-deck spreader for hoisting caissons according to claim 4, wherein the frame beams (31) and the frame corbels (32) are both seamless steel tube structures.
7. The double-layer lifting appliance for lifting the caisson according to claim 1, wherein the first lifting rod (1) is of an ERW steel pipe structure, the first lifting rope (2), the second lifting rope (4) and the third lifting rope (5) are all metal core steel wire ropes, and the lifting frame (3) is made of low carbon alloy steel.
8. The double-deck spreader for caisson hoisting according to claim 7, wherein the material of the first boom (1) is APLX70, the first lifting rope (2), the second lifting rope (4) and the third lifting rope (5) are all steel-cored wires, and the material of the hoisting frame (3) is Q345B.
9. A hoisting method using the double-layer sling for hoisting caissons according to any one of claims 1 to 8, comprising the following steps:
s1, determining the number M of caisson lifting points according to the number of caisson bins to be lifted and the weight of the caisson to be lifted;
s2, determining the number of the third lifting ropes (5) according to the number M of the caisson lifting points, and determining the distance between any two adjacent third lifting ropes (5) according to the distance between any two adjacent caisson lifting points on the same side of the caisson;
s3, connecting the first lifting rope (2) with a lifting hook of a lifting device, and moving the double-layer lifting appliance upwards for a first preset distance in the vertical direction;
s4, judging whether the center line of the third lifting rope (5) is vertical to the lifting frame (3), if so, entering the step S5; otherwise, adjusting the third lifting rope (5) until the central line of the third lifting rope (5) is perpendicular to the lifting frame (3), and then entering the step S5;
s5, after the double-layer lifting appliance is moved to a position above the position of the caisson to be lifted, the double-layer lifting appliance is controlled to move downwards along the vertical direction, so that one end, far away from the lifting frame (3), of the third lifting rope (5) is located in a lifting connection area connected with the lifting point of the caisson;
s6, connecting the third lifting rope (5) with the caisson lifting point;
s7, enabling the third lifting rope (5) to be in a stretched straight state, judging whether the third lifting rope (5) is vertical to a horizontal plane or not, and if so, entering the step S8; otherwise, adjusting the third lifting rope (5) until the third lifting rope (5) is vertical to the horizontal plane, and then entering step S8;
and S8, hoisting the caisson to a preset position through a double-layer lifting appliance.
10. The method of claim 9, wherein the hoist link region in step S5 is a hemispherical region having a radius R and a center at the caisson hoisting point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110373250.XA CN113003387A (en) | 2021-04-07 | 2021-04-07 | Double-layer lifting appliance for lifting caisson and lifting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110373250.XA CN113003387A (en) | 2021-04-07 | 2021-04-07 | Double-layer lifting appliance for lifting caisson and lifting method thereof |
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| Publication Number | Publication Date |
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| CN113003387A true CN113003387A (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110373250.XA Pending CN113003387A (en) | 2021-04-07 | 2021-04-07 | Double-layer lifting appliance for lifting caisson and lifting method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202030432U (en) * | 2010-12-22 | 2011-11-09 | 大连港集团有限公司 | Single-pull steel plate assembly clamping apparatus |
| CN104098018A (en) * | 2014-05-25 | 2014-10-15 | 中石化南京工程有限公司 | Reusable multistage balance beam combination system |
| CN106744258A (en) * | 2016-12-12 | 2017-05-31 | 中国船舶重工集团公司第七0研究所 | A kind of adjustable latent device suspension centre external hanging type of structure lays retracting device and method |
| CN107298371A (en) * | 2017-06-23 | 2017-10-27 | 中冶天工集团有限公司 | A kind of steel structure modularization house universal hanger and on-site hoisting installation method |
| US20180029849A1 (en) * | 2015-04-08 | 2018-02-01 | Hans Kunz GmbH | Transport unit |
| CN208964364U (en) * | 2018-09-21 | 2019-06-11 | 广西建工轨道装配式建筑产业有限公司 | A kind of assembled laminated floor slab Automatic hook block |
| CN210193181U (en) * | 2019-07-24 | 2020-03-27 | 连云港满航国际货代有限公司 | Container turning lifting appliance for port crane |
| CN211687913U (en) * | 2019-12-16 | 2020-10-16 | 成都程航航空科技有限公司 | Full-machine hanger |
-
2021
- 2021-04-07 CN CN202110373250.XA patent/CN113003387A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202030432U (en) * | 2010-12-22 | 2011-11-09 | 大连港集团有限公司 | Single-pull steel plate assembly clamping apparatus |
| CN104098018A (en) * | 2014-05-25 | 2014-10-15 | 中石化南京工程有限公司 | Reusable multistage balance beam combination system |
| US20180029849A1 (en) * | 2015-04-08 | 2018-02-01 | Hans Kunz GmbH | Transport unit |
| CN106744258A (en) * | 2016-12-12 | 2017-05-31 | 中国船舶重工集团公司第七0研究所 | A kind of adjustable latent device suspension centre external hanging type of structure lays retracting device and method |
| CN107298371A (en) * | 2017-06-23 | 2017-10-27 | 中冶天工集团有限公司 | A kind of steel structure modularization house universal hanger and on-site hoisting installation method |
| CN208964364U (en) * | 2018-09-21 | 2019-06-11 | 广西建工轨道装配式建筑产业有限公司 | A kind of assembled laminated floor slab Automatic hook block |
| CN210193181U (en) * | 2019-07-24 | 2020-03-27 | 连云港满航国际货代有限公司 | Container turning lifting appliance for port crane |
| CN211687913U (en) * | 2019-12-16 | 2020-10-16 | 成都程航航空科技有限公司 | Full-machine hanger |
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Application publication date: 20210622 |