CN215402779U

CN215402779U - Four-rope multi-magnification winding system for large bridge crane

Info

Publication number: CN215402779U
Application number: CN202121088467.8U
Authority: CN
Inventors: 胡水根; 李太周; 利歌
Original assignee: Kerun Electro Mechanical Engineering Co ltd
Current assignee: Kerun Electro Mechanical Engineering Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-01-04
Anticipated expiration: 2031-05-20

Abstract

The utility model discloses a four-rope multi-magnification winding system for a large bridge crane, and relates to the technical field of hoisting mechanical equipment. The winding system comprises four winding drums which are symmetrically arranged on the left outer side and the right outer side of a hanging beam and are arranged in a vertically layered mode, a plurality of sets of fixed pulley blocks arranged on a web plate of the hanging beam, balance pulley blocks hung in the middle shaft surfaces of the fixed pulley blocks, a movable pulley block arranged at the upper end part of a pull plate of a lifting hook, a hanging hook assembly arranged at the lower end part of the pull plate of the lifting hook and a steel wire rope for winding and connecting all the parts into a whole. The utility model can ensure that the four steel wire ropes do not interfere in the winding process between the movable pulley block and the fixed pulley block by utilizing the winding mode of clockwise and anticlockwise switching directions of the four duplex winding drums, the duplex pulley block or the quadruple pulley block on the left and the right, and the balance pulley block and the four steel wire ropes, and can ensure that the four steel wire ropes have the same length and are stressed uniformly, thereby realizing stable hoisting and accurate positioning on large hoisting equipment.

Description

Four-rope multi-magnification winding system for large bridge crane

Technical Field

The utility model relates to the technical field of hoisting mechanical equipment, in particular to a four-rope multi-rate winding system for a large bridge crane.

Background

The large bridge crane is mainly used for hoisting and installing in place of large equipment (such as a large generator set), a winding system of a main hoisting mechanism of the large bridge crane is usually matched with a duplex winding drum and a duplex pulley block, and pulleys in the pulley block are configured according to the required multiplying power and structural requirements. In order to ensure stable hoisting and accurate positioning, the steel wire rope of the winding drum is usually wound in a single layer, a steel wire rope winding system with large multiplying power is required to be adopted when some large-scale equipment is hoisted, the larger the multiplying power of the steel wire rope is, the larger the winding amount of the corresponding winding drum is, a single winding drum cannot meet the use requirement, and two winding drums or even four winding drums are required to be adopted for winding. If four winding drums are provided, four steel wire ropes participate in hoisting at the same time.

In addition, the hoisting mechanism of the existing large bridge crane mostly adopts a module design, and the hoisting mechanism can be composed of one hoisting module (see fig. 1), two hoisting modules (see fig. 2) or four hoisting modules (see fig. 3). Each lifting module consists of a reel matching motor, a coupling, a brake and a steel wire rope. Four steel wire ropes participate in hoisting simultaneously for a hoisting mechanism formed by combining four hoisting modules, and because the weight of the hoisted equipment is large, each steel wire rope needs to be wound in a multi-time rate mode. Therefore, how to ensure that the four steel wire ropes do not interfere in the winding process between the movable pulley block and the fixed pulley block and the four steel wire ropes are stressed in a balanced manner is a technical problem which is urgently solved by a four-rope multi-magnification winding system of a large bridge crane.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a four-rope multi-rate winding system for a large bridge crane, aiming at the defects in the prior art. The four-rope multi-magnification winding system can ensure that four steel wire ropes are not interfered in the winding process between the movable pulley block and the fixed pulley block, and can ensure that the four steel wire ropes have the same length and are stressed uniformly, thereby realizing stable hoisting and accurate positioning of large hoisting equipment.

The object of the utility model can be achieved by the following technical measures:

the utility model relates to a four-rope multi-multiplying-power winding system for a large bridge crane, which comprises four winding drums (used for drawing and retracting steel wire ropes) which are symmetrically arranged at the left and right outer sides of a hanging beam and are arranged in an up-down layered manner, a plurality of sets of fixed pulley blocks (the hanging beam web is used as an installation foundation of the fixed pulley blocks, the fixed pulley blocks are used for supporting the steel wire ropes and changing the acting direction of force), a balance pulley block (the balance pulley blocks can effectively adjust the length of the steel wire ropes and the tension of the steel wire ropes) which is hung in the central shaft surface of the fixed pulley blocks, a movable pulley block (the movable pulley block can save labor) which is arranged at the upper end part of a lifting hook pulling plate, a lifting hook component (used for hanging heavy objects) which is arranged at the lower end part of the lifting hook pulling plate, and the steel wire ropes which wind and connect all the components into a whole (the movable pulley blocks, the fixed pulley blocks and the balance pulley blocks can be connected through winding according to actual requirements, to transfer long distance loads); two steel wire ropes wound out from the winding drum on the upper layer on the left side respectively wind through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end and then are wound into the winding drum on the lower layer on the right side, two steel wire ropes wound out from the winding drum on the lower layer on the left side respectively wind through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end and then are wound into the winding drum on the upper layer on the right side, and the winding direction of each steel wire rope in the winding process is clockwise switched and anticlockwise switched (due to the matching of the balance pulley blocks in the winding process of the steel wire ropes and the clockwise switched and the anticlockwise switched of each steel wire rope in the winding process, so that the length and the tension of the steel wire ropes can be effectively adjusted, the two steel wire ropes wound out from the same winding drum are stressed equally, and the positions of each steel wire rope in the winding-in pulley block and the winding-out pulley block are arranged in the middle due to the change of the winding direction, the position of a winding point of the steel wire rope on the winding drum is ensured to be in the middle of the winding drum when the lifting hook assembly is at the highest position, and the winding length of the winding drum can be utilized to the maximum extent; and the winding drum at the rope outlet end of the steel wire rope and the winding drum at the rope winding end of the steel wire rope at the other side are arranged one above the other, so that the lengths of four steel wire ropes on different winding drums at the upper layer and the lower layer can be adjusted to be consistent, and the tension is equivalent).

The number of the fixed pulley blocks in the first embodiment of the utility model is two (the fixed pulley blocks are a structure of an embodiment with a multiplying power of 5 and a structure of a duplex pulley block, and the multiplying power is smaller than 5 and is executed according to the structure of the embodiment), the fixed pulley blocks are horizontally arranged at the front end and the rear end of a hanging beam web plate side by side, each set of the fixed pulley blocks comprises a fixed pulley shaft and six fixed pulleys symmetrically sleeved on the fixed pulley shafts through bearings, wherein the outer sides of the hanging beam web plates on the left side and the right side are respectively provided with two fixed pulleys, and two fixed pulleys are arranged between the hanging beam web plates on the left side and the right side; the number of the balance pulley blocks is two, the balance pulley blocks are respectively horizontally arranged at the centers of the fixed pulley shafts of the front and the rear fixed pulley blocks side by side, each set of the balance pulley block comprises two balance plates for sleeving the fixed pulley shafts, and two balance pulley shafts inserted at the front and the rear ends of the two balance plates (in the winding system of the utility model, the pulleys in the front end movable pulley block, the front end fixed pulley block, the rear end movable pulley block and the rear end fixed pulley block in the double-linked pulley block are all in a bilateral symmetry structure, only the balance pulleys in the balance pulley blocks are arranged in a left-right spacing and front-back translation mode, on one hand, compared with the arrangement mode of bilateral symmetry of the balance pulleys, the left-right spacing between the balance pulleys can be reduced, further, the width of the double-linked pulley blocks and the hook component is reduced, namely, on the other hand, as long as the left-right spacing exists between the front and rear balance pulleys, the steel wire rope can avoid the cross and the interference of the steel wire rope in the winding process), and the two balance pulleys are symmetrically sleeved on each balance pulley shaft through bearings; the number of the movable pulley blocks is two (the structure is an embodiment structure of multiplying power 5 and a duplex pulley block, and the structure is executed according to a reference embodiment structure with multiplying power less than 5), and the movable pulley blocks are horizontally arranged at the front end and the rear end of the hook pulling plate side by side; each set of movable pulley block comprises a movable pulley shaft and ten movable pulleys symmetrically sleeved on the movable pulley shaft through bearings, wherein the two movable pulleys are arranged on the outer sides of the left and right hook pull plates, and six movable pulleys are arranged between the left and right hook pull plates.

In the first embodiment of the present invention, two steel wire ropes wound from the upper layer of the winding drum on the left side are respectively wound through the even-numbered movable pulleys, the even-numbered fixed pulleys and the even-numbered balance pulleys in the movable pulley block, the fixed pulley block and the balance pulley block which correspond to the front end and the rear end of the steel wire ropes, and then wound on the lower layer of the winding drum on the right side; and two steel wire ropes wound out from the winding drum on the lower layer on the left side respectively wind through the movable pulley block, the fixed pulley block and the balance pulley block with odd serial numbers in the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end, and then are wound on the winding drum on the upper layer on the right side.

The number of the fixed pulley blocks in the second embodiment of the utility model is four (the second embodiment is a second embodiment with a multiplying power of 6 and a quadruple pulley block, and the second embodiment is executed with a structure with a multiplying power of more than 6), the fixed pulley blocks are arranged in an upper layer and a lower layer, two fixed pulley blocks on each layer are horizontally arranged at the front end and the rear end of the web plate of the hanging beam side by side, each fixed pulley block comprises a fixed pulley shaft and four fixed pulleys symmetrically sleeved on the fixed pulley shaft through a bearing, wherein the outer sides of the web plates of the hanging beam on the left side and the right side are respectively provided with one fixed pulley, and two fixed pulleys are arranged between the web plates of the hanging beam on the left side and the right side; the number of the balance pulley blocks is two, the balance pulley blocks are respectively horizontally arranged at the centers of the fixed pulley shafts of the front and the rear fixed pulley blocks on the lower layer side by side, each set of the balance pulley block comprises two balance plates for sleeving the fixed pulley shafts, and two balance pulley shafts inserted at the front and the rear ends of the two balance plates (in the winding system of the utility model, the pulleys in the front end movable pulley block, the front end fixed pulley block, the rear end movable pulley block and the rear end fixed pulley block in the four-linked pulley block are all in a bilateral symmetry structure, only the balance pulleys in the balance pulley blocks are arranged in a left-right spacing and front-back translation mode, on one hand, compared with the arrangement mode of bilateral symmetry of the balance pulleys, the left-right spacing between the balance pulleys can be reduced, further, the width of the two-linked pulley blocks and the hook component is reduced, namely, on the other hand, as long as the left-right spacing exists between the front and rear balance pulleys, the steel wire rope can avoid the cross and the interference of the steel wire rope in the winding process), and the two balance pulleys are symmetrically sleeved on each balance pulley shaft through bearings; the number of the movable pulley blocks is four (the two structures are the two structures of the embodiment with the multiplying power of 6 and the four-linked pulley blocks, the multiplying power is larger than 6, and the two structures of the reference embodiment are executed), the four-layer movable pulley blocks are arranged in an upper layer and a lower layer, the two sets of movable pulley blocks in the lower layer are horizontally arranged at the front end and the rear end of the hook pulling plate side by side, the two sets of movable pulley blocks in the upper layer are respectively hinged and connected with the two sets of movable pulley blocks in the lower layer through a connecting plate assembly, each set of movable pulley block comprises a movable pulley shaft and six movable pulleys symmetrically sleeved on the movable pulley shaft through bearings, one movable pulley is arranged on the outer side of each of the hook pulling plates on the left side and the right side, and four movable pulleys are arranged between the hook pulling plates on the left side and the right side.

In the second embodiment of the present invention, two steel wire ropes wound from the upper layer of the winding drum on the left side are respectively wound through the movable pulley in the movable pulley block on the upper layer, the fixed pulley in the fixed pulley block on the lower layer, and the balance pulley on the right side in the balance pulley block, which correspond to each other at the front and rear ends, and then wound through the movable pulley in the movable pulley block on the lower layer, the fixed pulley in the fixed pulley block on the upper layer, and finally wound onto the lower layer of the winding drum on the right side; and two steel wire ropes wound from the winding drum on the lower layer on the left side respectively wind through the movable pulley in the movable pulley block on the lower layer, the fixed pulley in the fixed pulley block on the upper layer and the balance pulley on the left side in the balance pulley block, which correspond to each other at the front end and the rear end, then wind through the movable pulley in the movable pulley block on the upper layer and the fixed pulley in the fixed pulley block on the lower layer, and finally wind into the winding drum on the upper layer on the right side.

In the second embodiment of the utility model, the bottom diameter of the fixed pulley in the fixed pulley block positioned on the upper layer is larger than the outer edge of the fixed pulley in the fixed pulley block positioned on the lower layer (the interference of the steel wire rope in the winding process between the movable pulley block and the fixed pulley block can be effectively avoided); the bottom diameter of the movable pulley in the movable pulley block positioned on the lower layer is larger than the outer edge of the movable pulley in the movable pulley block positioned on the upper layer (the interference of the steel wire rope in the winding process between the movable pulley block and the fixed pulley block can be effectively avoided).

In the second embodiment of the utility model, the connecting plate assembly consists of an upper connecting plate and two lower connecting plates fixed on two surfaces of the lower part of the upper connecting plate (two sets of movable pulley blocks on the upper layer are hinged with two sets of movable pulley blocks on the lower layer through the connecting plate assembly), and shaft through holes are processed in the upper part of the upper connecting plate and the lower part of the lower connecting plate (the shaft through hole in the upper part of the upper connecting plate is sleeved on the fixed pulley shaft, and the shaft through hole in the lower part of the lower connecting plate is sleeved on the movable pulley shaft).

In the utility model, a fixed pulley shaft penetrating hole II (ensuring smooth penetrating of the fixed pulley shaft) matched with the outer diameter of the fixed pulley shaft is processed in the middle of the balance plate, and balance shaft penetrating holes (ensuring smooth penetrating of the balance pulley shaft) matched with the outer diameter of the balance pulley shaft are symmetrically processed on two sides of the balance plate.

The hanging beam web plate is provided with fixed pulley shaft penetrating holes I matched with the fixed pulley shafts in number, position and outer diameter (smooth penetrating is ensured and the fixed pulley shafts are smoothly penetrated).

The design principle of the utility model is as follows:

the utility model can ensure that the four steel wire ropes are not interfered in the winding process between the movable pulley block and the fixed pulley block by utilizing the winding mode of clockwise and anticlockwise switching directions of the left and right double-wound drums, the double-wound pulley block (embodiment I) or the quadruple pulley block (embodiment II) and the balance pulley block and the four steel wire ropes, and can ensure that the four steel wire ropes have the same length and are stressed in balance, thereby realizing stable hoisting and accurate positioning on large hoisting equipment.

More specifically, in the utility model, two steel wire ropes wound from the winding drum on the upper layer on the left side are respectively wound into the winding drum on the lower layer on the right side after passing through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end, and the two steel wire ropes wound from the winding drum on the lower layer on the left side are respectively wound into the winding drum on the upper layer on the right side after passing through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end. Because the balance pulley block is matched in the winding process of the steel wire rope, the length and the tension of the steel wire rope can be effectively adjusted, and two steel wire ropes wound on the same winding drum can be stressed the same; the winding direction of each steel wire rope is switched clockwise and anticlockwise in the winding process, and the change of the winding direction enables the position of each steel wire rope in the middle of the winding-in pulley block and the position of each steel wire rope in the middle of the winding-out pulley block, so that the winding point of the steel wire rope on the winding drum is ensured to be in the middle of the winding drum when the lifting hook assembly is at the highest position, and the winding length of the winding drum can be utilized to the maximum extent; meanwhile, the winding drum at the rope outlet end of the steel wire rope and the winding drum at the rope winding end of the steel wire rope at the other side are arranged one above the other, so that the lengths of the four steel wire ropes on different winding drums at the upper layer and the lower layer can be adjusted to be consistent, and the tension is equivalent. In addition, the balance pulleys in the balance pulley block are arranged in a mode of horizontal movement at left and right intervals: on one hand, compared with a layout mode of bilateral symmetry of the balance pulleys, the left-right interval between the balance pulleys can be reduced, and further the width of the duplex pulley block and the width of the lifting hook assembly are reduced, namely the size of the lifting hook assembly is reduced; on the other hand, as long as the left and right intervals exist between the front and rear balance pulleys, the steel wire ropes can be prevented from crossing in the winding process, and the interference of the steel wire ropes is avoided.

The utility model has the following beneficial technical effects:

the four-rope multi-magnification winding system can ensure that four steel wire ropes are not interfered in the winding process between the movable pulley block and the fixed pulley block, and can ensure that the four steel wire ropes have the same length and are stressed uniformly, thereby realizing stable hoisting and accurate positioning of large hoisting equipment.

Drawings

Fig. 1 is a schematic view of a conventional hoisting mechanism consisting of one hoisting module.

Fig. 2 is a schematic view of a conventional hoisting mechanism consisting of two hoisting modules.

Fig. 3 is a schematic view of a conventional hoisting mechanism consisting of four hoisting modules.

The reference numerals in fig. 1 to 3 indicate: 1 ', lifting modules I, 2 ', traditional lifting beams, 3 ', lifting modules II, 4 ', lifting modules III, 5 ' and lifting modules VI.

Fig. 4 is a schematic structural diagram of a four-rope five-fold double pulley block winding system (embodiment one).

FIG. 5 is a cross-sectional view of M-M in FIG. 4 (embodiment one).

Fig. 6 is a schematic diagram of the rope winding of a four-rope five-fold double pulley block winding system (example one).

FIG. 7 is a schematic view of a four-rope six-fold-ratio four-block pulley winding system (example II).

Fig. 8 is a sectional view taken along line N-N in fig. 7 (example two).

Fig. 9 is a schematic diagram of the rope winding of a four-rope six-fold-rate four-gang pulley block winding system (example two).

Fig. 10 is a schematic structural view of the balance pulley block.

Fig. 11 is a schematic view of a connector plate assembly.

Fig. 12 is a left side view of fig. 11.

The numbers in fig. 4 to 12 explain: 1. 1-1 parts of a hanging beam, 1-1 parts of a hanging beam web plate and 1-1 parts of a fixed sliding shaft through hole I; 2. a reel; 3. a fixed pulley block 3-1, a fixed pulley shaft 3-2 and a fixed pulley; 4. 4-1 parts of a balance pulley block, 4-1 parts of a balance plate, 4-1-1 parts of a fixed sliding shaft penetrating hole II, 4-1-2 parts of a balance shaft penetrating hole 4-2 parts of a balance pulley shaft 4-3 parts of a balance pulley; 5. a movable pulley block 5-1, a movable pulley shaft 5-2 and a movable pulley; 6. a hook pulling plate; 7. a hook assembly; 8. a wire rope; 9. 9-1 parts of connecting plate components, 9-2 parts of upper connecting plates, 9-3 parts of lower connecting plates and shaft penetrating holes.

Detailed Description

The utility model will be further described with reference to the accompanying drawings:

example one

The first embodiment is a structure with multiplying power of 5 and a duplex pulley block, and the structure of the reference embodiment with multiplying power less than 5 is implemented.

As shown in fig. 4 to 6, 10, 11, and 12, a four-rope multi-power winding system for a large bridge crane according to an embodiment includes four reels 2 (for drawing and releasing a steel wire rope 8) symmetrically disposed on left and right outer sides of a hanging beam 1 and arranged in layers, a plurality of sets of fixed pulley blocks 3 mounted on a hanging beam web 1-1 (the hanging beam web 1-1 serves as a mounting base for the fixed pulley blocks 3, the fixed pulley blocks 3 are used for supporting the steel wire rope 8 and changing the acting direction of force), a balance pulley block 4 (the balance pulley block 4 can effectively adjust the length of the steel wire rope 8 and the tension of the balance steel wire rope 8) mounted in a middle shaft surface of the fixed pulley blocks, a movable pulley block 5 (the movable pulley block 5 can save labor) mounted at an upper end portion of a hanging hook pulling plate 6, and a hanging hook assembly 7 (for hanging a heavy object) mounted at a lower end portion of the hanging hook pulling plate 6, a steel wire rope 8 which winds and connects the components into a whole (the steel wire rope 8 can connect the movable pulley block 5, the fixed pulley block 3 and the balance pulley block 4 through winding according to actual needs so as to transmit long-distance load); two steel wire ropes 8 wound out of the winding drum 2 on the upper left layer are wound into the winding drum 2 on the lower right layer after respectively passing through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end, two steel wire ropes 8 wound out of the winding drum 2 on the lower left layer are wound into the winding drum 2 on the upper right layer after respectively passing through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end, and the winding direction of each steel wire rope 8 in the winding process is switched clockwise and anticlockwise (due to the matching of the balance pulley blocks in the winding process of the steel wire ropes 8, and the winding direction of each steel wire rope 8 in the winding process is switched clockwise and anticlockwise, so that the length and the tension of the steel wire ropes can be effectively adjusted, two steel wire ropes wound out of the same winding drum can be stressed equally, and the change of the winding direction enables the positions of each steel wire rope in the winding drum and the winding out of the pulley blocks to be in the middle, the position of a winding point of the steel wire rope on the winding drum is ensured to be in the middle of the winding drum when the lifting hook assembly is at the highest position, and the winding length of the winding drum can be utilized to the maximum extent; and the winding drum at the rope outlet end of the steel wire rope and the winding drum at the rope winding end of the steel wire rope at the other side are arranged one above the other, so that the lengths of four steel wire ropes on different winding drums at the upper layer and the lower layer can be adjusted to be consistent, and the tension is equivalent).

In the first embodiment, the number of the fixed pulley blocks 3 is two (the fixed pulley blocks are 5 in multiplying power and are a structure of a duplex pulley block according to the first embodiment, and the multiplying power is less than 5 according to the structure of the first embodiment), the fixed pulley blocks are horizontally arranged at the front end and the rear end of a hanging beam web 1-1 side by side, each set of fixed pulley block 3 comprises a fixed pulley shaft 3-1 and six fixed pulleys 3-2 symmetrically sleeved on the fixed pulley shaft 3-1 through bearings, wherein the outer sides of the hanging beam webs 1-1 at the left side and the right side are respectively provided with two fixed pulleys 3-2, and two fixed pulleys 3-2 are arranged between the hanging beam webs at the left side and the right side; the number of the balance pulley blocks 4 is two, the balance pulley blocks are respectively horizontally arranged at the centers of fixed pulley shafts 3-1 of front and rear fixed pulley blocks side by side, each set of the balance pulley block 4 comprises two balance plates 4-1 for sleeving the fixed pulley shafts, and two balance pulley shafts 4-2 inserted at the front and rear ends of the two balance plates (in the winding system of the utility model, pulleys in a front end movable pulley block, a front end fixed pulley block, a rear end movable pulley block and a rear end fixed pulley block which form a duplex pulley block all adopt a bilateral symmetry structure, only the balance pulleys 4-3 in the balance pulley block 4 adopt a bilateral spacing and front and rear translation mode for layout, on one hand, compared with the bilateral symmetry layout mode of the balance pulleys 4-3, the bilateral spacing between the balance pulleys 4-3 can be reduced, and further the width of the duplex pulley block and the hook component 7 is reduced, i.e. reducing the size of the hook assembly 7; on the other hand, as long as the front and rear balance pulleys 4-3 are spaced left and right, the steel wire rope 8 can be prevented from crossing and interference of the steel wire rope 8 in the winding process, and the two balance pulleys 4-3 symmetrically sleeved on each balance pulley shaft through bearings; the number of the movable pulley blocks 5 is two (the structure is an embodiment structure of multiplying power 5 and a duplex pulley block, and the structure is executed according to a reference embodiment structure with multiplying power less than 5), and the movable pulley blocks are horizontally arranged at the front end and the rear end of the hook pull plate 6 side by side; each set of movable pulley block 5 comprises a movable pulley shaft 5-1 and ten movable pulleys 5-2 symmetrically sleeved on the movable pulley shaft through bearings, wherein two movable pulleys 5-2 are uniformly arranged on the outer sides of the left and right hook pull plates 6, and six movable pulleys 5-2 are arranged between the left and right hook pull plates.

In the first embodiment, two steel wire ropes 8 wound from the winding drum 2 on the upper layer on the left side are respectively wound through the movable pulley block 5, the fixed pulley block 3 and the balance pulley block 4 which are respectively corresponding to the front end and the rear end and have even serial numbers, namely the movable pulley 5-2, the fixed pulley 3-2 and the balance pulley 4-3, and then are wound on the winding drum 2 on the lower layer on the right side; two steel wire ropes 8 wound out from the winding drum 2 at the lower layer on the left side respectively wind through the movable pulley 5, the fixed pulley 3 and the balance pulley 4 with odd numbers in the movable pulley block 5, the fixed pulley block 3 and the balance pulley block 4 which respectively correspond to the front end and the rear end, and then are wound on the winding drum 2 at the upper layer on the right side.

In the first embodiment, a fixed pulley shaft through hole ii 4-1-1 (ensuring smooth through installation of the fixed pulley shaft 3-1) matched with the outer diameter of the fixed pulley shaft is processed in the middle of the balance plate 4-1, and balance shaft through holes 4-1-2 (ensuring smooth through installation of the balance pulley shaft 4-2) matched with the outer diameter of the balance pulley shaft are symmetrically processed on both sides of the balance plate.

In the first embodiment, the hanging beam web 1-1 is provided with fixed pulley shaft through holes I1-1-1 (ensuring smooth through installation and ensuring smooth through installation of the fixed pulley shafts 3-1) matched with the fixed pulley shafts 3-1 in number, position and outer diameter.

Example two

The second embodiment is a structure with the multiplying power of 6 and a quadruple pulley block, and the second embodiment is executed according to the structure with the multiplying power of more than 6.

As shown in fig. 7 to 12, the second embodiment is different from the first embodiment in that (other technical features are the same as those of the first embodiment):

in the second embodiment, the number of the fixed pulley blocks 3 is four (the second embodiment is a second embodiment with a multiplying power of 6 and a quadruple pulley block, and the second embodiment is executed with a structure with a multiplying power of more than 6), the fixed pulley blocks are arranged in an upper layer and a lower layer, two fixed pulley blocks on each layer are horizontally arranged at the front end and the rear end of the hanging beam web 1-1 side by side, each set of fixed pulley block 3 comprises a fixed pulley shaft 3-1 and four fixed pulleys 3-2 symmetrically sleeved on the fixed pulley shaft 3-1 through bearings, wherein the outer sides of the hanging beam webs 1-1 on the left side and the right side are respectively provided with one fixed pulley 3-2, and two fixed pulleys 3-2 are arranged between the hanging beam webs on the left side and the right side; the number 4 of the balance pulley blocks is two, the balance pulley blocks are respectively horizontally arranged at the centers of fixed pulley shafts 3-1 of two sets of fixed pulley blocks at the front and the rear of the lower layer side by side, each set of balance pulley block 4 comprises two balance plates 4-1 for sleeving the fixed pulley shafts, and two balance pulley shafts 4-2 inserted at the front and the rear ends of the two balance plates (in the winding system of the utility model, the pulleys in the front end movable pulley block, the front end fixed pulley block, the rear end movable pulley block and the rear end fixed pulley block in the four-linked pulley block are all in a bilateral symmetry structure, only the balance pulleys 4-3 in the balance pulley block 4 are arranged in a bilateral and longitudinal translation mode, on one hand, compared with the bilateral symmetry layout mode of the balance pulleys 4-3, the bilateral interval between the balance pulleys 4-3 can be reduced, and further the width of the two-linked pulley block and the hook component 7 is reduced, i.e. reducing the size of the hook assembly 7; on the other hand, as long as the front and rear balance pulleys 4-3 are spaced left and right, the steel wire rope 8 can be prevented from crossing and interference of the steel wire rope 8 in the winding process, and the two balance pulleys 4-3 symmetrically sleeved on each balance pulley shaft through bearings; the number of the movable pulley blocks 5 is four (the second embodiment is a second embodiment with the multiplying power of 6 and a quadruple pulley block, the second embodiment is a structure with the multiplying power of more than 6, and the execution is performed according to the second embodiment with the multiplying power of more than 6), the movable pulley blocks are arranged in an upper layer and a lower layer, the two lower layers of the movable pulley blocks are horizontally arranged at the front end and the rear end of the hook pull plate 6 side by side, the two upper layers of the movable pulley blocks 5 are respectively hinged and connected with the two lower layers of the movable pulley blocks through a connecting plate assembly 9, each set of the movable pulley blocks 5 comprises a movable pulley shaft 5-1 and six movable pulleys 5-2 symmetrically sleeved on the movable pulley shaft through bearings, one movable pulley 5-2 is uniformly arranged on the outer side of the hook pull plates on the left side and the right side, and four movable pulleys 5-2 are arranged between the hook pull plates on the left side and the right side.

In the second embodiment, two steel wire ropes 8 wound from the winding drum 2 on the upper layer on the left side respectively wind through the movable pulleys 5-2 in the movable pulley block 5 on the upper layer, the fixed pulleys 3-2 in the fixed pulley block 3 on the lower layer and the balance pulleys 4-3 on the right side in the balance pulley block 4, which are respectively corresponding to the front and rear ends, then wind through the movable pulleys 5-2 in the movable pulley block 5 on the lower layer and the fixed pulleys 3-2 in the fixed pulley block 3 on the upper layer, and finally wind into the winding drum 2 on the lower layer on the right side; two steel wire ropes 8 wound from the winding drum 2 on the lower left layer respectively wind through the movable pulleys 5-2 in the movable pulley block 5 on the lower layer, the fixed pulleys 3-2 in the fixed pulley block 3 on the upper layer and the balance pulleys 4-3 on the left side in the balance pulley block 4, which correspond to each other at the front and rear ends, then wind through the movable pulleys 5-2 in the movable pulley block 5 on the upper layer and the fixed pulleys 3-2 in the fixed pulley block 3 on the lower layer, and finally wind into the winding drum 2 on the upper right layer.

In the second embodiment, the bottom diameter of the fixed pulley 3-2 in the fixed pulley block 3 positioned on the upper layer is larger than the outer edge of the fixed pulley 3-2 in the fixed pulley block 3 positioned on the lower layer (so that the interference of the steel wire rope 8 in the winding process between the movable pulley block and the fixed pulley block can be effectively avoided); the bottom diameter of the movable pulley 5-2 in the movable pulley block 5 positioned at the lower layer is larger than the outer edge of the movable pulley 5-2 in the movable pulley block 5 positioned at the upper layer (the interference of the steel wire rope 8 in the winding process between the movable pulley block and the fixed pulley block can be effectively avoided).

In the second embodiment, the connecting plate assembly 9 is composed of an upper connecting plate 9-1 and two lower connecting plates 9-2 fixed on two surfaces of the lower part of the upper connecting plate (two sets of movable pulley blocks 5 on the upper layer are hinged with two sets of movable pulley blocks 5 on the lower layer through the connecting plate assembly 9), and shaft through holes 9-3 are processed on the upper part of the upper connecting plate and the lower part of the lower connecting plate (the shaft through holes 9-3 on the upper part of the upper connecting plate are sleeved on the fixed pulley shafts 3-1, and the shaft through holes 9-3 on the lower part of the lower connecting plate are sleeved on the movable pulley shafts 5-1).

The specific use cases of the utility model are as follows:

firstly, determining the hoisting multiplying power according to the weight of a large component to be hoisted, selecting the combination of a duplex winding drum and a duplex pulley block or the combination of the duplex winding drum and a quadruple pulley block according to the hoisting multiplying power, and selecting the structure and the winding mode of the first embodiment or the second embodiment according to the combination mode; then, assembling corresponding parts according to the selected embodiment structure, namely respectively hanging two sets of balance pulley blocks 4 in the central axes of two fixed pulley blocks 3 positioned at the lower layer, installing the two sets of fixed pulley blocks 3 positioned at the lower layer to corresponding positions of a lifting beam web 1-1 (in the first embodiment, if the second embodiment is added with the two sets of fixed pulley blocks 3 positioned at the upper layer), then installing two sets of movable pulley blocks 5 at the upper end part of a lifting hook pulling plate 6 (in the first embodiment, if the second embodiment is added, the two sets of movable pulley blocks 5 positioned at the upper layer are hinged and connected with the two sets of movable pulley blocks 5 positioned at the lower layer through a connecting plate assembly 9), and installing a lifting hook assembly 7 at the lower end part of the lifting hook pulling plate 6; winding the steel wire rope 8 in sequence according to the winding manner of the steel wire rope 8 in the first embodiment or the second embodiment; and finally, starting the winding drum 2 to rotate, driving the corresponding pulleys in the movable pulley block 5, the fixed pulley block 3 and the balance pulley block 4 to rotate by the steel wire rope 8, and driving the lifting hook assembly 7 and the lifted large-scale equipment to carry out stable lifting and accurate in-place operation.

Claims

1. A four rope multiple rate winding system for a large bridge crane, characterized by: the lifting beam comprises four winding drums (2) which are symmetrically arranged on the left outer side and the right outer side of a lifting beam (1) and are arranged in an up-down layered manner, a plurality of sets of fixed pulley blocks (3) arranged on a web plate (1-1) of the lifting beam, a balance pulley block (4) hung in the middle shaft surface of the fixed pulley blocks, a movable pulley block (5) arranged at the upper end part of a lifting hook pulling plate (6), a lifting hook component (7) arranged at the lower end part of the lifting hook pulling plate (6), and a steel wire rope (8) which winds and connects all the components into a whole; two steel wire ropes (8) wound out of the winding drum (2) on the upper layer on the left side respectively wind the winding drum (2) on the lower layer on the right side after passing through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end, two steel wire ropes (8) wound out of the winding drum (2) on the lower layer on the left side respectively wind the winding drum (2) on the upper layer on the right side after passing through the movable pulley block, the fixed pulley block and the balance pulley block which respectively correspond to the front end and the rear end, and the winding direction of each steel wire rope (8) is switched clockwise and anticlockwise in the winding process.

2. A four rope multiple rate winding system for large bridge cranes according to claim 1, characterized in that: the number of the fixed pulley blocks (3) is two, the fixed pulley blocks are horizontally arranged at the front end and the rear end of a hanging beam web plate (1-1) side by side, each set of fixed pulley block (3) comprises a fixed pulley shaft (3-1) and six fixed pulleys (3-2) symmetrically sleeved on the fixed pulley shaft (3-1) through bearings, two fixed pulleys (3-2) are arranged on the outer sides of the hanging beam web plates (1-1) on the left side and the right side, and two fixed pulleys (3-2) are arranged between the hanging beam web plates on the left side and the right side; the number of the balance pulley blocks (4) is two, the balance pulley blocks are respectively horizontally arranged at the centers of fixed pulley shafts (3-1) of the front and rear fixed pulley blocks side by side, each set of balance pulley block (4) comprises two balance plates (4-1) for sleeving the fixed pulley shafts, two balance pulley shafts (4-2) inserted at the front and rear ends of the two balance plates, and two balance pulleys (4-3) symmetrically sleeved on each balance pulley shaft through bearings; the number of the movable pulley blocks (5) is two, and the movable pulley blocks are horizontally arranged at the front end and the rear end of the lifting hook pull plate (6) side by side; each set of movable pulley block (5) comprises a movable pulley shaft (5-1) and ten movable pulleys (5-2) symmetrically sleeved on the movable pulley shaft through bearings, wherein the outer sides of the left and right hook pull plates (6) are respectively provided with two movable pulleys (5-2), and six movable pulleys (5-2) are arranged between the left and right hook pull plates.

3. A four rope multiple rate winding system for large bridge cranes according to claim 1, characterized in that: two steel wire ropes (8) wound out of the winding drum (2) on the upper layer on the left side respectively pass through the movable pulley block (5), the fixed pulley block (3) and the balance pulley block (4) which are respectively corresponding to the front end and the rear end and have even serial numbers, the fixed pulley (3-2) and the balance pulley (4-3), and then are wound on the winding drum (2) on the lower layer on the right side; two steel wire ropes (8) wound out of the winding drum (2) on the lower layer on the left side respectively wind through the movable pulley block (5), the fixed pulley block (3) and the balance pulley block (4) which are respectively corresponding to the front end and the rear end and have odd numbers of the movable pulley (5-2), the fixed pulley (3-2) and the balance pulley (4-3), and then are wound on the winding drum (2) on the upper layer on the right side.

4. A four rope multiple rate winding system for large bridge cranes according to claim 1, characterized in that: the number of the fixed pulley blocks (3) is four, the fixed pulley blocks are arranged in an upper layer and a lower layer, two fixed pulley blocks on each layer are horizontally arranged at the front end and the rear end of a hanging beam web plate (1-1) side by side, each fixed pulley block (3) comprises a fixed pulley shaft (3-1) and four fixed pulleys (3-2) symmetrically sleeved on the fixed pulley shaft (3-1) through bearings, one fixed pulley (3-2) is arranged on the outer side of each hanging beam web plate (1-1) on the left side and the right side, and two fixed pulleys (3-2) are arranged between the hanging beam web plates on the left side and the right side; the number of the balance pulley blocks (4) is two, the balance pulley blocks are respectively horizontally arranged at the centers of fixed pulley shafts (3-1) of the front and rear fixed pulley blocks at the lower layer side by side, each set of balance pulley block (4) comprises two balance plates (4-1) for sleeving the fixed pulley shafts, two balance pulley shafts (4-2) inserted at the front and rear ends of the two balance plates, and two balance pulleys (4-3) symmetrically sleeved on each balance pulley shaft through bearings; the number of the movable pulley blocks (5) is four, the movable pulley blocks are arranged in an upper layer and a lower layer, the two sets of the movable pulley blocks on the lower layer are horizontally arranged at the front end and the rear end of the hook pull plate (6) side by side, the two sets of the movable pulley blocks on the upper layer are respectively hinged and connected with the two sets of the movable pulley blocks on the lower layer through the connecting plate assembly (9), each set of the movable pulley blocks (5) comprises a movable pulley shaft (5-1) and six movable pulleys (5-2) symmetrically sleeved on the movable pulley shaft through bearings, one movable pulley (5-2) is arranged on the outer side of each hook pull plate on the left side and the right side, and four movable pulleys (5-2) are arranged between the hook pull plates on the left side and the right side.

5. A four rope multiple rate winding system for large bridge cranes according to claim 1, characterized in that: two steel wire ropes (8) wound from the winding drum (2) on the upper layer on the left side respectively wind through a movable pulley (5-2) which is arranged in the movable pulley block (5) on the upper layer, a fixed pulley (3-2) arranged in the fixed pulley block (3) on the lower layer and a balance pulley (4-3) arranged on the right side in the balance pulley block (4) and corresponds to the front end and the rear end respectively, then wind through the movable pulley (5-2) arranged in the movable pulley block (5) on the lower layer and the fixed pulley (3-2) arranged in the fixed pulley block (3) on the upper layer, and finally wind into the winding drum (2) on the lower layer on the right side; two steel wire ropes (8) wound out of the winding drum (2) on the lower layer on the left side respectively wind through the movable pulleys (5-2) which are respectively corresponding to the front end and the rear end and are positioned in the movable pulley block (5) on the lower layer, the fixed pulleys (3-2) positioned in the fixed pulley block (3) on the upper layer, the balance pulleys (4-3) positioned on the left side in the balance pulley block (4), then wind through the movable pulleys (5-2) positioned in the movable pulley block (5) on the upper layer and the fixed pulleys (3-2) positioned in the fixed pulley block (3) on the lower layer, and finally are wound into the winding drum (2) on the upper layer on the right side.

6. A four rope multiple rate winding system for large bridge girder erection machines according to claim 4, wherein: the bottom diameter of a fixed pulley (3-2) in the fixed pulley block (3) positioned on the upper layer is larger than the outer edge of the fixed pulley (3-2) in the fixed pulley block (3) positioned on the lower layer; the bottom diameter of the movable pulley (5-2) in the movable pulley block (5) positioned at the lower layer is larger than the outer edge of the movable pulley (5-2) in the movable pulley block (5) positioned at the upper layer.

7. A four rope multiple rate winding system for large bridge girder erection machines according to claim 4, wherein: the connecting plate component (9) consists of an upper connecting plate (9-1) and two lower connecting plates (9-2) fixed on two surfaces of the lower part of the upper connecting plate, and shaft penetrating holes (9-3) are formed in the upper part of the upper connecting plate and the lower part of the lower connecting plate.

8. A four rope multiple rate winding system for large bridge cranes according to claim 2 or 4, characterized in that: a fixed sliding shaft penetrating hole II (4-1-1) matched with the outer diameter of the fixed sliding wheel shaft is processed in the middle of the balance plate (4-1), and balance shaft penetrating holes (4-1-2) matched with the outer diameter of the balance sliding wheel shaft are symmetrically processed on two sides of the balance plate.

9. A four rope multiple rate winding system for large bridge cranes according to claim 2 or 4, characterized in that: and fixed sliding shaft through holes I (1-1-1) matched with the fixed sliding shaft (3-1) in number, position and outer diameter are machined in the hanging beam web (1-1).