A wire rope winding method for a double-lifting device of a crane

Abstract

The present invention relates to a double-lifting device for a crane and a wire rope winding method, which includes a drum group, a suspension beam and a crane trolley. The drum group includes a first drum and a second drum. A first fixed pulley group is arranged below the first drum, and a second fixed pulley group is arranged below the second drum. A first guiding mechanism is arranged between the first drum and the crane trolley, and a second guiding mechanism is arranged between the second drum and the crane trolley. The first guiding mechanism and the second guiding mechanism are used to keep the double-lifting structure balanced. Corresponding first movable pulley groups and second movable pulley groups are arranged on the suspension beam, and the first movable pulley groups and the second movable pulley groups are fixedly connected to the suspension beam. The present invention is provided with a double-lifting device, which realizes the balance between the double-lifting mechanisms of the crane by changing the winding mode of the wire rope, ensures that the double-lifting mechanisms can lift and lower synchronously, reduces the accident risk, and improves the service life of the wire rope.

Description

Technical Field

[0001] The present invention relates to the field of lifting equipment, and particularly to a wire rope winding method for a double-lifting device of a crane. Background Art

[0002] At present, traditional double-hook and four-hook cranes generally are provided with two sets of independent lifting mechanisms, and the wire ropes of the double-lifting mechanisms are wound separately. To ensure the synchronous lifting and lowering of the double-lifting mechanisms, the double-lifting mechanisms are often rigidly connected. If one of the lifting mechanisms fails, the lifting mechanism of the crane will stop working, and the whole machine cannot work properly, presenting certain potential safety hazards.

[0003] In the patent document with the patent application number 03141943.7 and the name "Container Crane Capable of Lifting Double 40-Foot Containers", a double-lifting structure is disclosed. The two double-lifting structures are rigidly connected with independent double-lifting mechanisms. During the hoisting process, the wire ropes are prone to breakage, causing accidents.

[0004] In the patent document with the patent application number CN101054152A and the name "Double-Lifting Container Crane", a wire rope winding method for a double-lifting mechanism is disclosed. This method can effectively reduce the wear of the wire rope and other components and improve the service life of the wire rope. However, this winding method has a complex structure and potential safety hazards. Summary of the Invention

[0005] In order to solve the problems that when the existing double-hook and four-hook cranes are in operation, the lifting mechanisms are prone to failure and cause accidents, and the wire ropes are prone to breakage, the present invention provides a wire rope winding method for a double-lifting device of a crane. A double-lifting device is provided, and by changing the winding method of the wire rope, the balance between the double-lifting mechanisms of the crane is achieved, ensuring that the double-lifting mechanisms can lift and lower synchronously, reducing the risk of accidents, and improving the service life of the wire rope.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A double-lifting device for a crane, comprising a drum group, a lifting beam and a crane trolley. The drum group includes a first drum and a second drum. The first drum and the second drum are correspondingly arranged at the upper end of the crane trolley. A first fixed pulley group is arranged at the lower part of the first drum, and a second fixed pulley group is arranged at the lower part of the second drum. The first fixed pulley group and the second fixed pulley group are symmetrically arranged with respect to the median line of the crane trolley. A first guiding mechanism is arranged between the first drum and the crane trolley, and a second guiding mechanism is arranged between the second drum and the crane trolley. The first guiding mechanism and the second guiding mechanism are used to keep the double-lifting structure balanced. Corresponding first movable pulley group and second movable pulley group are arranged on the lifting beam. The first movable pulley group and the second movable pulley group are fixedly connected to the lifting beam. The first drum, the second drum, the first fixed pulley group, the second fixed pulley group, the first guiding mechanism, the second guiding mechanism, the first movable pulley group and the second movable pulley group are connected by steel wire ropes.

[0008] Further, the first guiding mechanism includes a first guiding pulley group and a third guiding pulley group. The first guiding pulley group is arranged parallel to the lifting beam, and the third guiding pulley group is arranged perpendicular to the lifting beam. The second guiding mechanism includes a second guiding pulley group and a fourth guiding pulley group. The second guiding pulley group is arranged parallel to the lifting beam, and the fourth guiding pulley group is arranged perpendicular to the lifting beam. The first guiding pulley group and the third guiding pulley group, the second guiding pulley group and the fourth guiding pulley group are all fixedly connected to the frame of the crane trolley.

[0009] Further, the first guiding pulley group and the second guiding pulley group are symmetrically arranged, and the third guiding pulley group and the fourth guiding pulley group are symmetrically arranged.

[0010] Further, the steel wire rope includes a first steel wire rope and a second steel wire rope.

[0011] A steel wire rope winding method based on a double-lifting device for a crane, comprising the following steps:

[0012] Step 1: Wind the first steel wire rope on the first drum and fix it. Then, the end of the first steel wire rope far from the second drum bypasses a movable pulley of the first movable pulley group and is connected to a fixed pulley of the first fixed pulley group. The first steel wire rope is sequentially and cross-wound around the movable pulleys of the first movable pulley group and the fixed pulleys of the first fixed pulley group.

[0013] Step 2: Wind the wire out of the last movable pulley of the first movable pulley group on the third guiding pulley group, and then connect the second guiding pulley group, so that the first steel wire rope is fixedly connected to the second drum through the second guiding pulley group, and the first steel wire rope forms a closed loop.

[0014] Step 3: Wind the second steel wire rope around the second drum and fix it, then pass the end of the second steel wire rope away from the first drum around a movable pulley of the second movable pulley group and connect to a fixed pulley of the second fixed pulley group, and the second steel wire rope is cross-wound around the movable pulley of the second movable pulley group and the fixed pulley of the second fixed pulley group in sequence;

[0015] Step 4: Wrap the outgoing line of the last movable pulley of the second movable pulley group around the fourth guide pulley group, and then connect the first guide pulley group, so that the second steel wire rope is fixedly connected to the first drum through the first guide pulley group, and the second steel wire rope forms a closed loop.

[0016] Furthermore, the winding direction of the first steel wire rope is from one side of the first drum to one side of the second drum, and the winding direction of the second steel wire rope is from one side of the second drum to one side of the first drum.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention is based on a wire rope winding method for a double lifting device of a crane, and is provided with a double lifting device, wherein the double lifting device includes a first guide mechanism and a second guide mechanism, wherein the first guide mechanism and the second guide mechanism are used to ensure that the double lifting structure remains balanced, so that the double lifting mechanism maintains uniform force when subjected to force, and there will be no force point deviation. At the same time, the first guide mechanism and the second guide mechanism can avoid the problem of entanglement and knotting of multiple sections of wire ropes during operation, thereby improving the safety performance of the double lifting mechanism.

[0019] 2. The double lifting device is improved on the original crane, and the first fixed pulley group, the second fixed pulley group, the first guide mechanism, the second guide mechanism, the first movable pulley group and the second movable pulley group are all universal pulley devices, which are easy to install and disassemble and convenient for replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The invention discloses a structural schematic diagram of a double lifting device of a crane.

[0021] Figure 2 It is a schematic diagram of winding the first steel wire rope of a double lifting device of a crane according to the present invention.

[0022] Figure 3 This is a schematic diagram of the winding of the second steel wire rope of a double lifting device of a crane according to the present invention.

[0023] The reference numerals in the drawings are: 101 is the first reel, 102 is the second reel, 2 is the suspension beam, 3 is the first fixed pulley block, 4 is the second fixed pulley block, 5 is the first guiding pulley block, 6 is the third guiding pulley block, 7 is the second guiding pulley block, 8 is the fourth guiding pulley block, 9 is the first movable pulley block, 10 is the second movable pulley block, 1101 is the first steel wire rope, and 1102 is the second steel wire rope. Detailed implementation manners

[0024] The present invention will be further described below in conjunction with the drawings and the detailed implementation manners:

[0025] As Figures 1 to 3 shown, a double-lifting device of a crane includes a reel set, a suspension beam 2 and a crane trolley. The reel set includes a first reel 101 and a second reel 102. The first reel 101 and the second reel 102 are correspondingly arranged at the upper end of the crane trolley. A first fixed pulley block 3 is arranged below the first reel 101, and a second fixed pulley block 4 is arranged below the second reel 102. The first fixed pulley block 3 and the second fixed pulley block 4 are symmetrically arranged with respect to the median line of the crane trolley. A first guiding mechanism is arranged between the first reel 101 and the crane trolley, and a second guiding mechanism is arranged between the second reel 102 and the crane trolley. The first guiding mechanism and the second guiding mechanism are used to keep the double-lifting structure balanced. A first movable pulley block 9 and a second movable pulley block 10 are correspondingly arranged on the suspension beam 2. The first movable pulley block 9 and the second movable pulley block 10 are fixedly connected to the suspension beam 2. The first reel 101, the second reel 102, the first fixed pulley block 3, the second fixed pulley block 4, the first guiding mechanism, the second guiding mechanism, the first movable pulley block 9 and the second movable pulley block 10 are connected by steel wire ropes.

[0026] In order to reduce the wear of the steel wire ropes, reduce the working resistance, and avoid knotting of the first steel wire rope 1101 and the second steel wire rope 1102, the first guiding mechanism includes a first guiding pulley block 5 and a third guiding pulley block 6. The first guiding pulley block 5 is arranged parallel to the suspension beam 2, and the third guiding pulley block 6 is arranged perpendicular to the suspension beam 2. The second guiding mechanism includes a second guiding pulley block 7 and a fourth guiding pulley block 8. The second guiding pulley block 7 is arranged parallel to the suspension beam 2, and the fourth guiding pulley block 8 is arranged perpendicular to the suspension beam 2. The first guiding pulley block 5 and the third guiding pulley block 6, the second guiding pulley block 7 and the fourth guiding pulley block 8 are all fixedly connected to the frame of the crane trolley.

[0027] In order to make the forces on the crane trolley and the suspension beam 2 uniform, the first guiding pulley block 5 and the second guiding pulley block 7 are symmetrically arranged, and the third guiding pulley block 6 and the fourth guiding pulley block 8 are symmetrically arranged.

[0028] A method for winding a steel wire rope 11 of a double-lifting device of a crane includes the following steps:

[0029] Step 1: Wind the first steel wire rope 1101 around the first reel 101 and fix it. Then, the end of the first steel wire rope 1101 away from the second reel 102 bypasses a movable pulley of the first movable pulley block 9 and connects a fixed pulley of the first fixed pulley block 3. The first steel wire rope 1101 alternately winds around the movable pulleys of the first movable pulley block 9 and the fixed pulleys of the first fixed pulley block 3.

[0030] Step 2: Wind the wire led out from the last movable pulley of the first movable pulley block 9 around the third guide pulley block 6, and then connect the second guide pulley block 7, so that the first steel wire rope 1101 is fixedly connected to the second reel 102 via the second guide pulley block 7, and the first steel wire rope 1101 forms a closed loop.

[0031] Step 3: Wind the second steel wire rope 1102 around the second reel 102 and fix it. Then, the end of the second steel wire rope 1102 away from the first reel 101 bypasses a movable pulley of the second movable pulley block 10 and connects a fixed pulley of the second fixed pulley block 4. The second steel wire rope 1102 alternately winds around the movable pulleys of the second movable pulley block 10 and the fixed pulleys of the second fixed pulley block 4.

[0032] Step 4: Wind the wire led out from the last movable pulley of the second movable pulley block 10 around the fourth guide pulley block 8, and then connect the first guide pulley block 5, so that the second steel wire rope 1102 is fixedly connected to the first reel 101 via the first guide pulley block 5, and the second steel wire rope 1102 forms a closed loop.

[0033] To avoid incorrect winding directions of the steel wire ropes, the winding direction of the first steel wire rope 1101 is from one side of the first reel 101 to one side of the second reel 102, and the winding direction of the second steel wire rope 1102 is from one side of the second reel 102 to one side of the first reel 101.

[0034] The above embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention patent should be included in the scope of the patent application of the present invention.

Claims

1. A wire rope winding method for a double-lifting device of a crane, comprising a drum group, a lifting beam (2) and a crane trolley, characterized in that, The drum set includes a first drum (101) and a second drum (102). The first drum (101) and the second drum (102) are correspondingly arranged at the upper end of the crane trolley. A first fixed pulley set (3) is arranged at the lower part of the first drum (101), and a second fixed pulley set (4) is arranged at the lower part of the second drum (102). The first fixed pulley set (3) and the second fixed pulley set (4) are symmetrically arranged with respect to the median line of the crane trolley. A first guiding mechanism is arranged between the first drum (101) and the crane trolley, and a second guiding mechanism is arranged between the second drum (102) and the crane trolley. The first guiding mechanism and the second guiding mechanism are used to keep the double-lifting structure balanced. A first movable pulley set (9) and a second movable pulley set (10) are correspondingly arranged on the hanging beam (2). The first movable pulley set (9) and the second movable pulley set (10) are fixedly connected to the hanging beam (2). The first drum (101), the second drum (102), the first fixed pulley set (3), the second fixed pulley set (4), the first guiding mechanism, the second guiding mechanism, the first movable pulley set (9) and the second movable pulley set (10) are connected by steel wires; The first guiding mechanism includes a first guiding pulley set (5) and a third guiding pulley set (6). The first guiding pulley set (5) is arranged parallel to the hanging beam (2), and the third guiding pulley set (6) is arranged perpendicular to the hanging beam (2). The second guiding mechanism includes a second guiding pulley set (7) and a fourth guiding pulley set (8). The second guiding pulley set (7) is arranged parallel to the hanging beam (2), and the fourth guiding pulley set (8) is arranged perpendicular to the hanging beam (2). The first guiding pulley set (5) and the third guiding pulley set (6), the second guiding pulley set (7) and the fourth guiding pulley set (8) are all fixedly connected to the frame of the crane trolley; The first guiding pulley set (5) and the second guiding pulley set (7) are symmetrically arranged, and the third guiding pulley set (6) and the fourth guiding pulley set (8) are symmetrically arranged; The steel wire includes a first steel wire (1101) and a second steel wire (1102); It includes the following steps: Step 1: Wind the first steel wire (1101) on the first drum (101) and fix it. Then, the end of the first steel wire (1101) far from the second drum (102) bypasses a movable pulley of the first movable pulley set (9) and is connected to a fixed pulley of the first fixed pulley set (3). The first steel wire (1101) is sequentially and cross-wound around the movable pulleys of the first movable pulley set (9) and the fixed pulleys of the first fixed pulley set (3); Step 2: Wind the outgoing wire of the last movable pulley of the first movable pulley set (9) on the third guiding pulley set (6), and then connect the second guiding pulley set (7) so that the first steel wire (1101) is fixedly connected to the second drum (102) through the second guiding pulley set (7), and the first steel wire (1101) forms a closed loop; Step 3: Wind and fix the second steel wire rope (1102) on the second reel (102). Then, the end of the second steel wire rope (1102) away from the first reel (101) bypasses a movable pulley of the second movable pulley block (10) and is connected to a fixed pulley of the second fixed pulley block (4). The second steel wire rope (1102) is wound around the movable pulleys of the second movable pulley block (10) and the fixed pulleys of the second fixed pulley block (4) in a crossed manner in sequence. Step 4: Wind the wire output of the last movable pulley of the second movable pulley block (10) around the fourth guiding pulley block (8). Then, connect the first guiding pulley block (5) so that the second steel wire rope (1102) is fixedly connected to the first reel (101) through the first guiding pulley block (5), and the second steel wire rope (1102) forms a closed loop.

2. The wire rope winding method for a double-lifting device of a crane according to claim 1, characterized in that, The winding direction of the first steel wire rope (1101) is from one side of the first reel (101) to one side of the second reel (102), and the winding direction of the second steel wire rope (1102) is from one side of the second reel (102) to one side of the first reel (101).

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