CN210457261U

CN210457261U - Variable-amplitude pull rope structure of movable-arm crane

Info

Publication number: CN210457261U
Application number: CN201921332759.4U
Authority: CN
Inventors: 郭志康; 张经勇; 孙烽炜; 韩哲
Original assignee: Kerun Electro Mechanical Engineering Co ltd
Current assignee: Kerun Electro Mechanical Engineering Co ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-05
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a luffing rope structure of crane belongs to hoisting machinery's technical field. The variable-amplitude pull rope structure comprises two groups of preposed pull plates (8) with the front ends hinged to the head part (7) of a cargo boom, two groups of variable-amplitude movable pulley blocks (2) respectively hinged to the rear ends of the two groups of preposed pull plates (8), and variable-amplitude steel wire ropes (1) wound between the variable-amplitude movable pulley blocks (2) and corresponding variable-amplitude winches. The utility model discloses a preceding, the rear end of leading arm-tie link to each other with jib loading boom head, the direct articulated of the running block that becomes width of cloth respectively, realize the leading of the running block that becomes width of cloth, make the full length of width of cloth wire rope not have concentrated load, the atress is even, reduces greatly that becomes width of cloth wire rope's no-load down warp and warp, reduces the tower machine impact, improves the safety in utilization greatly, realizes the jib loading boom through receiving and releasing the width of cloth wire rope convenient and fast ground and raises or the width of cloth purpose that becomes. The utility model discloses save and become width of cloth cable, have simple structure, maintain convenient, the economical advantage of being suitable for.

Description

Variable-amplitude pull rope structure of movable-arm crane

Technical Field

The utility model belongs to the technical field of hoisting machinery, more specifically say and relate to a luffing jib crane's change width of cloth stay cord structure.

Background

The hoisting equipment which changes the amplitude through the elevation angle change of the crane boom is called a swing-arm crane, such as a crawler crane, a portal crane, a mast crane and a swing-arm tower crane, has the advantages of compact structure, large effective height, light weight, small wind load, large hoisting capacity and convenient installation and disassembly, and is widely applied to engineering construction in the fields of thermal power, hydropower, metallurgy, mines and the like.

The luffing system of the luffing jib crane mainly comprises a luffing rope structure driven by a luffing winch. The length of a cargo boom of the large-scale movable arm luffing crane is generally 50-70 meters, the maximum length of a luffing pull rope system is 60-80 meters, and the purpose of pitching the cargo boom is achieved by changing the length of the pull rope system through a luffing winch. The conventional luffing pull rope structure (see fig. 1) comprises: the variable-amplitude steel wire rope 1 is wound between the variable-amplitude winch and the variable-amplitude movable pulley block 2, the rear connecting pull plate 3 is hinged with the variable-amplitude movable pulley block 2, the front end of the rear connecting pull plate 3 is hinged with the balance wheel 4, the balance wheel 4 is connected with the rear end of the front connecting pull plate 6 through the variable-amplitude inhaul cable 5, and the front end of the front connecting pull plate 6 is hinged on the head part 7 of the cargo boom. In the traditional variable-amplitude pull rope structure, the variable-amplitude pulley block 2 is positioned above the middle part of the crane boom, and the weight of the variable-amplitude pulley block 2 is 2-4 tons, so that the variable-amplitude steel wire rope 1 is seriously downwarped and has large sag when in an empty hook, and can bring great impact to the crane boom and the whole crane when in hoisting start, thereby seriously affecting the safety and the service life of equipment; the amplitude-variable stay rope has the advantages of multiple structural links, complex structure, large diameter, high price, difficult maintenance and poor economical efficiency.

Disclosure of Invention

The purpose of the utility model is to provide a luffing rope structure of a jib crane aiming at the defects existing in the prior art. The utility model discloses a become width of cloth movable pulley group and become width of cloth wire rope's leading, it is more reasonable to make the atress that becomes width of cloth wire rope, has reduced greatly that becomes width of cloth wire rope's no-load downwarping and deformation, has reduced the tower machine and has strikeed, has improved the safety in utilization greatly, and convenient and fast ground realizes the width of cloth that becomes of jib loading boom. In addition, the device also has the advantages of simple structure, convenient maintenance, economy and applicability.

The purpose of the utility model can be realized by the following technical measures:

the utility model discloses a luffing rope structure of crane jib crane includes that the front end articulates two sets of leading arm-stays at the jib loading boom head, articulate two sets of luffing blocks that change at two sets of leading arm-stays rear ends respectively (through leading arm-stay and jib loading boom head, luffing block's articulated linking to each other, the leading of luffing block has been realized, it is more reasonable to make luffing wire rope's atress, the no-load down-warping and the deformation of luffing wire rope have been reduced greatly, tower machine impact has been reduced, safety in utilization has been improved greatly), convolute luffing wire rope between the luffing winch that becomes luffing block and correspond (through the luffing winch receive and release luffing wire rope convenient and fast the luffing purpose that realizes the jib loading boom or the luffing down of lying.

The utility model discloses the quantity of well leading arm-tie of every group is two, and the quantity that every group becomes the width of cloth movable pulley block is four (according to the actual work needs and the different work efficiency that becomes of width of cloth, the quantity scope that every group becomes the width of cloth movable pulley block is 3 ~ 5).

The design principle of the utility model is as follows:

the utility model discloses a preceding, the rear end of leading arm-tie links to each other with jib loading boom head, the direct articulated of the movable pulley block that becomes width of cloth respectively, has realized the leading of the movable pulley block that becomes width of cloth, makes the full length that becomes width of cloth wire rope not have concentrated load, the atress is even, has reduced greatly and has become width of cloth wire rope's no-load downwarping and deformation, has reduced the tower machine and has strikeed, has improved safety in utilization greatly to realize the jib loading boom through receive and release the width of cloth wire rope convenient and fast ground and raise or the width of. Furthermore, the utility model discloses become width of cloth cable and reduce the one-level and connect the arm-tie than traditional width of cloth stay structure has saved, still has simple structure, maintains the advantage convenient, that economy is suitable for.

More specifically, the length of a cargo boom of a common large-scale movable arm luffing crane is generally 50-70 meters, and the maximum length of a luffing pull rope system is 60-80 meters. In a traditional variable-amplitude pull rope structure (shown in figure 1), a variable-amplitude movable pulley block is arranged above the middle part of a cargo boom, and due to the action of concentrated load of the variable-amplitude movable pulley block, the variable-amplitude pull rope is seriously downwarped when the cargo boom is empty, so that the impact on the cargo boom and a whole machine is great when a crane is restarted, and the safety and the service life of equipment are seriously influenced. And in the utility model discloses an become width of cloth stay cord structure (see figure 4), then will become width of cloth assembly pulley and move forward to the jib loading boom head, become width of cloth wire rope's full length like this and do not have concentrated load, the atress is even, has reduced greatly and has become width of cloth wire rope's no-load down warp and warp, has reduced the tower machine and has strikeed, has improved the safety in utilization greatly.

The utility model has the advantages of as follows:

the utility model discloses a become width of cloth movable pulley group and become width of cloth wire rope's leading, it is more reasonable to make the atress that becomes width of cloth wire rope, has reduced greatly that becomes width of cloth wire rope's no-load downwarping and deformation, has reduced the tower machine and has strikeed, has improved the safety in utilization greatly, and convenient and fast ground realizes the width of cloth that becomes of jib loading boom. In addition, the device also has the advantages of simple structure, convenient maintenance, economy and applicability.

Will the utility model discloses on the wide application was moved boom crane, the result was obvious, and the concrete embodiment is as follows:

in a movable arm type crane (such as a movable arm tower crane) with the lifting capacity of 80 tons, a traditional variable amplitude cable uses 2 high-strength steel wire ropes with the length of 70 meters and the diameter of 50 millimeters, the steel wire ropes are respectively folded, four ends of the steel wire ropes are pressed and sleeved by aluminum alloy, the manufacturing cost is 0.3 ten thousand yuan, the cost of a balance wheel and a connecting piece is 0.3 ten thousand yuan, the assembling, disassembling, detecting and maintaining cost before and after each project is 0.21 yuan, and the total cost of 4 projects with the service life of (0.3 +0.3+4 multiplied by 0.21) =1.44 ten thousand yuan; after the amplitude-variable cable, the balance wheel and the connecting piece are cancelled, the amplitude-variable cable is replaced by lengthening the amplitude-variable steel wire rope, 2 common steel wire ropes with the lengths of 280 meters (the multiplying power is 8) and the diameters of 26 millimeters are lengthened, the purchase cost is 0.28 ten thousand yuan, the service life is 4 projects, the maintenance cost is 0.16 ten thousand yuan, the total cost is 0.44 ten thousand yuan and is only 30% of the former, the cost is saved by 1 ten thousand yuan for each project, and meanwhile, the method is safe, reliable, scientific, practical, simple and convenient to manufacture, the efficiency is improved, the popularization and the application have great significance for manufacturing the movable arm crane, and the social benefit and.

Drawings

Fig. 1 is a schematic structural view of a conventional luffing pull rope.

Fig. 2 is a view in the direction a of fig. 1.

Fig. 3 is a view from direction B of fig. 1.

Fig. 4 is a schematic structural diagram of the present invention.

Fig. 5 is a view in the direction C of fig. 4.

Part numbers in the drawings: 1-amplitude steel wire rope, 2-amplitude movable pulley block, 3-rear connecting pull plate, 4-balance wheel, 5-amplitude inhaul cable, 6-front connecting pull plate, 7-crane boom head, 8 and front pull plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings:

as shown in figure 4 of the drawings, in which, fig. 5 shows, the utility model discloses a luffing rope structure of jib crane includes that the front end articulates two sets of leading arm-tie (8) at jib loading boom head (7), articulate two sets of luffing pulley blocks (2) at two sets of leading arm-tie (8) rear ends respectively (through leading arm-tie (8) and jib loading boom head (7), the articulated of luffing pulley block (2) links to each other, the leading of luffing pulley block (2) has been realized, the atress that makes luffing rope (1) more reasonable, the no-load downwarp and the deformation of luffing rope (1) have been reduced greatly, tower machine impact has been reduced, safety in utilization has been improved greatly, the luffing rope (1) of coiling between luffing pulley block (2) and the luffing winch that corresponds (through the hoist receive and release luffing rope (1) convenient and fast ground realize the luffing purpose that the jib loading boom was raised or was lying prone down.

The utility model discloses the quantity of leading arm-tie (8) of well every group is two, and the quantity that every group becomes width of cloth movable pulley block (2) is four (according to the work efficiency that becomes width of cloth of actual work needs and difference, the quantity scope that every group becomes width of cloth movable pulley block (2) is 3 ~ 5).

The utility model discloses a concrete in service behavior as follows:

the front end of a front pull plate (8) is hinged with the head part (7) of the cargo boom, and the rear end of the front pull plate (8) is hinged with a variable amplitude movable pulley block (2); a variable-amplitude steel wire rope (1) led out from the variable-amplitude winch winds through corresponding pulleys in the variable-amplitude movable pulley block (2); and starting the variable-amplitude winch to rotate, controlling the variable-amplitude winch to rotate forwards or backwards according to the actual requirement that the crane boom is lifted or lies down, and stopping the variable-amplitude winch when the required elevation angle and amplitude of the crane boom are reached.

Claims

1. The utility model provides a luffing rope structure of jib crane which characterized in that: the crane jib hoisting device comprises two groups of preposed pull plates (8) with the front ends hinged to a crane jib head (7), two groups of amplitude-variable movable pulley blocks (2) respectively hinged to the rear ends of the two groups of preposed pull plates (8), and amplitude-variable steel wire ropes (1) wound between the amplitude-variable movable pulley blocks (2) and corresponding amplitude-variable winches.

2. The luffing rope structure of a jib crane according to claim 1, wherein: the number of each group of preposed pulling plates (8) is two, and the number of each group of variable amplitude movable pulley blocks (2) is four.