A four-rope multi-rate winding system for large bridge cranes

Abstract

The present invention discloses a four-rope multi-rate winding system for a large bridge crane, and relates to the technical field of lifting machinery and equipment. The winding system includes four drums symmetrically arranged on the left and right outer sides of the suspension beam and arranged in layers up and down, a plurality of fixed pulley blocks installed on the web of the suspension beam, a balancing pulley block hung in the central axis plane of the fixed pulley block, a movable pulley block installed on the upper end of the hook pull plate, and a hook assembly installed on the lower end of the hook pull plate, and a steel wire rope that is wound and connected as one of the above components. The present invention utilizes four left and right double drums and a double pulley block or a quadruple pulley block, and cooperates with a balancing pulley block and a winding method of switching the clockwise and counterclockwise directions of four steel wire ropes, which can ensure that the four steel wire ropes do not interfere with each other during the winding process between the movable pulley block and the fixed pulley block, and can make the four steel wire ropes have the same length and balanced force, thereby realizing stable lifting and precise positioning of large lifting equipment.

Description

Technical Field

[0001] The invention relates to the technical field of lifting machinery and equipment, and more specifically to a four-rope multi-rate winding system for a large bridge crane. Background Art

[0002] Large bridge cranes are mainly used for the lifting and installation of large equipment (such as large generator sets). The winding system of the main hoisting mechanism is usually matched with a double drum and a double pulley block. The pulleys in the pulley block are configured according to the required ratio and structural requirements. In order to ensure smooth lifting and precise positioning, the drum wire rope is usually wound in a single layer. When lifting some large equipment, a large-ratio wire rope winding system is required. The larger the wire rope ratio, the larger the corresponding drum winding volume. A single drum will not be able to meet the use requirements, and two or even four drums are required for winding. If there are four drums, four wire ropes will be involved in the lifting at the same time.

[0003] In addition, the lifting mechanism of large bridge cranes currently adopts a modular design. The lifting mechanism can be composed of a lifting module (see Figure 1 ), or by two lifting modules (see Figure 2 ) or four lifting modules (see Figure 3 ). Each lifting module is composed of a drum, a motor, a coupling, a brake, and a wire rope. For a lifting mechanism composed of four lifting modules, four wire ropes will be involved in the lifting at the same time. Because the weight of the hoisted equipment is large, each wire rope must be wound in multiple times. Therefore, how to ensure that the four wire ropes do not interfere with each other during the winding process between the movable pulley block and the fixed pulley block, and that the four wire ropes are balanced in force, is a technical problem that needs to be solved urgently in the four-rope multiple-rate winding system of large bridge cranes. Summary of the invention

[0004] The purpose of the present invention is to provide a four-rope multi-rate winding system for large bridge cranes to address the deficiencies in the above-mentioned prior art. The four-rope multi-rate winding system of the present invention can ensure that the four steel wire ropes do not interfere with each other during the winding process between the movable pulley block and the fixed pulley block, and can make the four steel wire ropes of the same length and balanced in force, thereby achieving stable lifting and precise positioning of large lifting equipment.

[0005] The purpose of the present invention can be achieved by the following technical measures:

[0006] The four-rope multi-rate winding system for a large bridge crane of the present invention comprises four drums (used for pulling and releasing steel wire ropes) symmetrically arranged on the left and right outer sides of the hanging beam and arranged in layers up and down, several sets of fixed pulley blocks installed on the web of the hanging beam (the web of the hanging beam serves as the installation base of the fixed pulley block, and the fixed pulley block is used to support the steel wire rope and change the direction of force), and a balancing pulley block hung on the central axis of the fixed pulley block (the balancing pulley block can effectively adjust the length of the steel wire rope and balance the tension of the steel wire rope) , a movable pulley block installed on the upper end of the hook pull plate (the movable pulley block can save effort), a hook assembly installed at the lower end of the hook pull plate (used to hang heavy objects), and a steel wire rope that winds and connects the above components into one (the steel wire rope can connect the movable pulley block, the fixed pulley block, and the balancing pulley block through winding according to actual needs, thereby transmitting long-distance loads); the two steel wire ropes wound from the drum on the upper layer on the left are respectively wound around the movable pulley block, the fixed pulley block, and the balancing pulley block corresponding to the front and rear ends, and then rolled into the right The two steel wire ropes wound from the left lower drum are respectively wound through the movable pulley group, the fixed pulley group and the balance pulley group corresponding to the front and rear ends, and then wound into the right upper drum. The winding direction of each steel wire rope can be switched between clockwise and counterclockwise during the winding process (due to the cooperation of the balance pulley group in the above steel wire rope winding process, and the winding direction of each steel wire rope can be switched between clockwise and counterclockwise during the winding process, so that the length and The tension can be achieved by making the two steel wire ropes wound on the same drum bear the same force. The change of winding direction makes each steel wire rope be in the middle when winding in and out of the pulley block, ensuring that the winding point of the wire rope on the drum is in the middle of the drum when the hook assembly is in the highest position, which can maximize the use of the winding length of the drum; and the drum at the wire rope outlet end and the drum at the wire rope collection end on the other side are arranged one above and one below, which can adjust the length of the four steel wire ropes on different drums in the upper and lower layers to be consistent and have equivalent tension).

[0007] The number of the fixed pulley blocks described in the first embodiment of the present invention is two sets (this is the structure of the first embodiment of the double pulley block with a magnification of 5, and the structure of the first embodiment is implemented with a magnification less than 5), which are horizontally installed side by side at the front and rear ends of the web of the hanging beam, and each set of the fixed pulley blocks includes a fixed pulley shaft and six fixed pulleys symmetrically mounted on the fixed pulley shaft through bearings, wherein two fixed pulleys are arranged on the outer sides of the webs of the hanging beams on the left and right sides, and two fixed pulleys are arranged between the webs of the hanging beams on the left and right sides; the number of the balancing pulley blocks is two sets, which are horizontally installed side by side at the centers of the fixed pulley shafts of the front and rear sets of the fixed pulley blocks, and each set of the balancing pulley blocks includes two balancing plates for mounting the fixed pulley shafts, and two balancing pulley shafts inserted at the front and rear ends of the two balancing plates (in the winding system of the present invention, the pulleys in the front movable pulley block, the front fixed pulley block, the rear movable pulley block, and the rear fixed pulley block in the double pulley block all adopt a left-right symmetrical structure, and only the pulleys in the balancing pulley block The balance pulleys are arranged in a left-right spacing and front-to-back translational manner: on the one hand, compared with the left-right symmetrical layout of the balance pulleys, the left-right spacing between the balance pulleys can be reduced, thereby reducing the width of the double pulley block and the hook assembly, that is, reducing the size of the hook assembly; on the other hand, as long as there is a left-right spacing between the front and rear balance pulleys, the wire ropes can avoid crossing during the winding process, avoiding wire rope interference), two balance pulleys symmetrically mounted on each balance pulley shaft through bearings; the number of the movable pulley blocks is two sets (this is the structure of embodiment 1 of the double pulley block with a magnification of 5, and the structure of embodiment 1 is referred to for the magnification less than 5), which are horizontally installed side by side at the front and rear ends of the hook pull plate; each set of movable pulley blocks includes a movable pulley shaft, ten movable pulleys symmetrically mounted on the movable pulley shaft through bearings, wherein 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.

[0008] In the first embodiment of the present invention, the two steel wire ropes wound off from the drum on the upper left side are respectively wound around the movable pulleys, fixed pulleys and balancing pulleys with even numbers in the movable pulley groups, fixed pulley groups and balancing pulley groups corresponding to the front and rear ends, and then wound onto the drum on the lower right side; the two steel wire ropes wound off from the drum on the lower left side are respectively wound around the movable pulleys, fixed pulleys and balancing pulleys with odd numbers in the movable pulley groups, fixed pulley groups and balancing pulley groups corresponding to the front and rear ends, and then wound onto the drum on the upper right side.

[0009] The number of the fixed pulley blocks described in the second embodiment of the present invention is four sets (this is the second embodiment structure of the quadruple pulley block with a magnification of 6, and the structure of the second embodiment is implemented with a magnification greater than 6), which are arranged in two layers, and the two sets of fixed pulley blocks in each layer are horizontally installed side by side at the front and rear ends of the web of the hanging beam, and each set of fixed pulley blocks includes a fixed pulley shaft and four fixed pulleys symmetrically mounted on the fixed pulley shaft through bearings, wherein one fixed pulley is arranged on the outer side of the web of the hanging beam on the left and right sides, and two fixed pulleys are arranged between the webs of the hanging beam on the left and right sides; The number of the balancing pulley blocks is two sets, which are horizontally and side by side installed at the center of the fixed pulley shafts of the front and rear fixed pulley blocks of the lower layer, and each set of balancing pulley blocks includes two balancing plates for fitting the fixed pulley shafts, and two balancing pulley shafts inserted at the front and rear ends of the two balancing plates (in the winding system of the present invention, the pulleys in the front movable pulley block, the front fixed pulley block, the rear movable pulley block, and the rear fixed pulley block in the quadruple pulley block all adopt a left-right symmetrical structure, and only the balancing pulley in the balancing pulley block adopts a left-right interval and the front The layout is arranged in a rear translation manner: on the one hand, compared with the layout of the balance pulleys being symmetrical on the left and right, it is possible to reduce the left and right intervals between the balance pulleys, thereby reducing the width of the double pulley block and the hook assembly, that is, reducing the size of the hook assembly; on the other hand, as long as there is a left and right interval between the front and rear balance pulleys, the wire rope can be prevented from crossing during the winding process, and wire rope interference can be avoided), two balance pulleys symmetrically mounted on each balance pulley shaft through bearings; the number of the movable pulley blocks is four sets (this is the second embodiment structure of the quadruple pulley block with a magnification of 6, and the structure of the second embodiment is implemented with a magnification greater than 6), which are arranged in two layers, the lower two sets of movable pulley blocks are horizontally installed side by side at the front and rear ends of the hook pull plate, the upper two sets of movable pulley blocks are respectively hingedly connected to the lower two sets of movable pulleys through the connecting plate assembly, each set of movable pulley blocks includes a movable pulley shaft, six movable pulleys symmetrically mounted on the movable pulley shaft through bearings, wherein one movable pulley is arranged on the outer sides of the left and right hook pull plates, and four movable pulleys are arranged between the left and right hook pull plates.

[0010] In the second embodiment of the present invention, the two steel wire ropes wound off from the drum on the upper layer on the left side are respectively wound around the movable pulleys in the movable pulley group corresponding to the front and rear ends and located on the upper layer, the fixed pulley in the fixed pulley group located on the lower layer, and the balancing pulley on the right side of the balancing pulley group, and then wound around the movable pulley in the movable pulley group located on the lower layer and the fixed pulley in the fixed pulley group located on the upper layer, and finally wound onto the drum on the lower layer on the right side; the two steel wire ropes wound off from the drum on the lower layer on the left side are respectively wound around the movable pulleys in the movable pulley group corresponding to the front and rear ends and located on the lower layer, the fixed pulley in the fixed pulley group located on the upper layer, and the balancing pulley on the left side of the balancing pulley group, and then wound around the movable pulley in the movable pulley group located on the upper layer and the fixed pulley in the fixed pulley group located on the lower layer, and finally wound onto the drum on the upper layer on the right side.

[0011] In the second embodiment of the present invention, the bottom diameter of the fixed pulley in the fixed pulley block located at the upper layer is larger than the outer edge of the fixed pulley in the fixed pulley block located at the lower layer (which can effectively avoid the interference of the wire rope during the winding process between the movable pulley block and the fixed pulley block); the bottom diameter of the movable pulley in the movable pulley block located at the lower layer is larger than the outer edge of the movable pulley in the movable pulley block located at the upper layer (which can effectively avoid the interference of the wire rope during the winding process between the movable pulley block and the fixed pulley block).

[0012] The connecting plate assembly described in the second embodiment of the present invention is composed of an upper connecting plate and two lower connecting plates fixed on the two surfaces of the lower part of the upper connecting plate (the two sets of movable pulley groups on the upper layer are hingedly connected to the two sets of movable pulley groups on the lower layer through the connecting plate assembly), and shaft holes are processed on the upper part of the upper connecting plate and the lower part of the lower connecting plate (the shaft holes on the upper part of the upper connecting plate are hung on the fixed pulley shaft, and the shaft holes on the lower part of the lower connecting plate are hung on the movable pulley shaft).

[0013] In the present invention, a fixed pulley shaft installation hole II matching the outer diameter of the fixed pulley shaft is processed in the middle of the balance plate (ensuring smooth installation of the fixed pulley shaft), and a balance shaft installation hole matching the outer diameter of the balance pulley shaft is symmetrically processed on both sides of the balance plate (ensuring smooth installation of the balance pulley shaft).

[0014] In the present invention, the web of the suspension beam is processed with fixed pulley shaft installation holes I (to ensure smooth installation of the fixed pulley shaft) that match the number, position and outer diameter of the fixed pulley shaft.

[0015] The design principle of the present invention is as follows:

[0016] The present invention utilizes four left and right double drums and a double pulley block (Example 1) or a quadruple pulley block (Example 2), and cooperates with a balancing pulley block and a clockwise and counterclockwise switching winding method of four steel ropes, which can ensure that the four steel ropes do not interfere with each other during the winding process between the movable pulley block and the fixed pulley block, and can make the four steel ropes have the same length and balanced force, thereby realizing stable lifting and precise positioning of large lifting equipment.

[0017] More specifically, in the present invention, the two steel wire ropes wound from the drum on the upper layer on the left side are respectively wound around the movable pulley group, the fixed pulley group and the balancing pulley group corresponding to the front and rear ends, and then are wound into the drum on the lower layer on the right side. The two steel wire ropes wound from the drum on the lower layer on the left side are respectively wound around the movable pulley group, the fixed pulley group and the balancing pulley group corresponding to the front and rear ends, and then are wound into the drum on the upper layer on the right side. Due to the cooperation of the balancing pulley group in the above-mentioned wire rope winding process, the length and tension of the wire rope can be effectively adjusted, and the two wire ropes wound on the same drum can be subjected to the same force; and the winding direction of each wire rope can be switched between clockwise and counterclockwise during the winding process. The change of winding direction makes the position of each wire rope in the middle when winding in and out of the pulley group, ensuring that the winding point of the wire rope on the drum is in the middle of the drum when the hook assembly is in the highest position, which can maximize the use of the winding length of the drum; at the same time, the drum at the wire rope outlet end and the drum at the wire rope collection end on the other side are arranged one above and one below, which can adjust the length and tension of the four wire ropes on different drums in the upper and lower layers to be consistent. In addition, the balancing pulleys in the balancing pulley block are arranged with left-right intervals and front-back translation: on the one hand, compared with the left-right symmetrical layout of the balancing pulleys, the left-right intervals between the balancing pulleys can be reduced, thereby reducing the width of the double pulley block and the hook assembly, that is, reducing the size of the hook assembly; on the other hand, as long as there is a left-right interval between the front and rear balancing pulleys, the wire rope can be avoided from crossing during the winding process, thereby avoiding wire rope interference.

[0018] The beneficial technical effects of the present invention are as follows:

[0019] The four-rope multi-rate winding system of the present invention can ensure that the four steel ropes do not interfere with each other during the winding process between the movable pulley block and the fixed pulley block, and can make the four steel ropes have the same length and balanced force, thereby achieving stable lifting and precise positioning of large lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a traditional lifting mechanism consisting of a lifting module.

[0021] Figure 2 It is a schematic diagram of a traditional lifting mechanism consisting of two lifting modules.

[0022] Figure 3 It is a schematic diagram of a traditional lifting mechanism consisting of four lifting modules.

[0023] Figure 1 to Figure 3 Explanation of the serial numbers: 1', lifting module I, 2', traditional lifting beam, 3', lifting module II, 4', lifting module III, 5', lifting module VI.

[0024] Figure 4It is a simplified structural diagram of a four-rope five-times-ratio double pulley winding system (Example 1).

[0025] Figure 5 yes Figure 4 MM cross-sectional view in (Example 1).

[0026] Figure 6 It is a simplified diagram of the rope winding of the four-rope five-times-ratio double pulley winding system (Example 1).

[0027] Figure 7 It is a simplified structural diagram of a four-rope six-times-ratio quadruple pulley winding system (Example 2).

[0028] Figure 8 yes Figure 7 NN cross-sectional view in (Example 2).

[0029] Fig. 9 It is a simplified diagram of the rope winding of the four-rope six-times-ratio quadruple pulley winding system (Example 2).

[0030] Fig.10 This is a simplified diagram of the structure of a balance pulley group.

[0031] Fig.11 It is a simplified structural diagram of the connecting plate assembly.

[0032] Fig.12 yes Fig.11 Left view of .

[0033] Figures 4 to 12 Explanation of the serial numbers: 1. Lifting beam, 1-1. Web plate of lifting beam, 1-1-1. Fixed sliding shaft mounting hole Ⅰ; 2. Drum; 3. Fixed pulley block, 3-1. Fixed pulley shaft, 3-2. Fixed pulley; 4. Balancing pulley block, 4-1. Balancing plate, 4-1-1. Fixed sliding shaft mounting hole Ⅱ, 4-1-2. Balancing shaft mounting hole, 4-2. Balancing pulley shaft, 4-3. Balancing pulley; 5. Moving pulley block, 5-1. Moving pulley shaft, 5-2. Moving pulley; 6. Hook pull plate; 7. Hook assembly; 8. Wire rope; 9. Connecting plate assembly, 9-1. Upper connecting plate, 9-2. Lower connecting plate, 9-3. Shaft hole. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] Embodiment 1

[0036] The first embodiment is a structure of a double pulley block with a magnification of 5. The structure of the first embodiment may be implemented with a magnification less than 5.

[0037] like Figures 4 to 6 , Fig.10 , Fig.11 , Fig.12As shown, a four-rope multi-rate winding system for a large bridge crane in the first embodiment includes four drums 2 (for pulling and releasing steel wire rope 8) symmetrically arranged on the left and right outer sides of the suspension beam 1 and arranged in layers up and down, a plurality of fixed pulley blocks 3 installed on the web 1-1 of the suspension beam (the web 1-1 of the suspension beam serves as the installation base of the fixed pulley block 3, and the fixed pulley block 3 is used to support the steel wire rope 8 and change the direction of force), a balancing pulley block 4 hung in the central axis plane of the fixed pulley block (the balancing pulley block 4 can effectively adjust the length of the steel wire rope 8 and balance the tension of the steel wire rope 8), a movable pulley block 5 installed at the upper end of the hook pull plate 6 (the movable pulley block 5 can save effort), a hook assembly 7 installed at the lower end of the hook pull plate 6 (for hanging heavy objects), a steel wire rope 8 wound and connected as one of the above components (the steel wire rope 8 can be pulled around the movable pulley block 5, the fixed pulley block 3, The balancing pulley block 4 is connected by winding, thereby transmitting a long-distance load); the two steel wire ropes 8 wound from the drum 2 on the upper layer on the left are respectively wound around the movable pulley block, fixed pulley block and balancing pulley block corresponding to the front and rear ends, and then wound into the drum 2 on the lower layer on the right; the two steel wire ropes 8 wound from the drum 2 on the lower layer on the left are respectively wound around the movable pulley block, fixed pulley block and balancing pulley block corresponding to the front and rear ends, and then wound into the drum 2 on the upper layer on the right, and the winding direction of each steel wire rope 8 is switched between clockwise and counterclockwise during the winding process (due to the cooperation of the balancing pulley block in the above-mentioned winding process of the steel wire rope 8, and each steel wire rope 8 During the winding process, the winding direction can be switched between clockwise and counterclockwise, which can effectively adjust the length and tension of the wire rope and achieve the same force on the two wire ropes wound on the same drum. The change of winding direction makes each wire rope in the middle when winding in and out of the pulley block, ensuring that the wire rope winding point on the drum is in the middle of the drum when the hook assembly is in the highest position, which can maximize the use of the winding length of the drum; and the drum at the wire rope outlet end and the wire rope collection end on the other side are arranged one above and one below, which can adjust the length and tension of the four wire ropes on different drums on the upper and lower layers to be consistent).

[0038] The number of the fixed pulley blocks 3 described in the first embodiment is two sets (this is the structure of the first embodiment of the double pulley block with a magnification of 5, and the structure of the first embodiment is implemented with a magnification less than 5). They are horizontally installed side by side at the front and rear ends of the web 1-1 of the hanging beam. Each set of fixed pulley blocks 3 includes a fixed pulley shaft 3-1, and six fixed pulleys 3-2 symmetrically mounted on the fixed pulley shaft 3-1 through bearings, wherein two fixed pulleys 3-2 are arranged on the outer sides of the webs 1-1 of the hanging beams on the left and right sides, and two fixed pulleys 3-2 are arranged between the webs 1-1 of the hanging beams on the left and right sides. 2; The number of the balancing pulley block 4 is two sets, which are horizontally installed side by side at the center of the fixed pulley shaft 3-1 of the front and rear fixed pulley blocks, and each set of the balancing pulley block 4 includes two balancing plates 4-1 for fitting the fixed pulley shaft, and two balancing pulley shafts 4-2 inserted at the front and rear ends of the two balancing plates (in the winding system of the present invention, the pulleys in the front movable pulley block, the front fixed pulley block, the rear movable pulley block, and the rear fixed pulley block in the double pulley block are all of a left-right symmetrical structure, and only the pulley in the balancing pulley block 4 is The balancing pulleys 4-3 are arranged in a left-right spacing and front-to-back translational manner: on the one hand, compared with the left-right symmetrical layout of the balancing pulleys 4-3, the left-right spacing between the balancing pulleys 4-3 can be reduced, thereby reducing the width of the double pulley block and the hook assembly 7, that is, reducing the size of the hook assembly 7; on the other hand, as long as there is a left-right spacing between the front and rear balancing pulleys 4-3, the wire rope 8 can avoid crossing during the winding process, avoiding interference of the wire rope 8), two balancing pulleys 4-3 symmetrically mounted on each balancing pulley shaft through bearings; the number of the movable pulley block 5 is two sets (this is the structure of the embodiment 1 of the double pulley block with a magnification of 5, and the structure of the embodiment 1 is implemented with a magnification less than 5), which are horizontally installed side by side at the front and rear ends of the hook pull plate 6; each set of movable pulley blocks 5 includes a movable pulley shaft 5-1, ten movable pulleys 5-2 symmetrically mounted on the movable pulley shaft through bearings, wherein two movable pulleys 5-2 are 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.

[0039] In the first embodiment, the two steel wire ropes 8 wound off from the drum 2 on the upper left side are respectively wound around the movable pulley group 5, the fixed pulley group 3 and the balancing pulley group 4 with even numbers, and then are wound onto the drum 2 on the lower right side; the two steel wire ropes 8 wound off from the drum 2 on the lower left side are respectively wound around the movable pulley group 5, the fixed pulley group 3 and the balancing pulley group 4 with odd numbers, and then are wound onto the drum 2 on the upper right side.

[0040] In the first embodiment, the middle part of the balance plate 4-1 is processed with a fixed pulley shaft installation hole II 4-1-1 that matches the outer diameter of the fixed pulley shaft (to ensure smooth installation of the fixed pulley shaft 3-1), and the two sides of the balance plate are symmetrically processed with balance shaft installation holes 4-1-2 that match the outer diameter of the balance pulley shaft (to ensure smooth installation of the balance pulley shaft 4-2).

[0041] In the first embodiment, the web 1-1 of the suspension beam is processed with fixed pulley shaft installation holes Ⅰ1-1-1 (to ensure smooth installation of the fixed pulley shaft 3-1) that match the number, position and outer diameter of the fixed pulley shaft 3-1.

[0042] Embodiment 2

[0043] The second embodiment is a structure of a quadruple pulley block with a magnification of 6. The structure of the second embodiment may be referred to when the magnification is greater than 6.

[0044] like Figure 7 to Figure 12 As shown, the difference between the second embodiment and the first embodiment is that (other technical features are the same as the first embodiment):

[0045] The number of the fixed pulley blocks 3 described in the second embodiment is four sets (this is the second embodiment structure of the quadruple pulley block with a magnification of 6, and the structure of the second embodiment is implemented with a magnification greater than 6). They are arranged in two layers, and the two sets of fixed pulley blocks in each layer are horizontally installed side by side at the front and rear ends of the web 1-1 of the hanging beam. Each set of fixed pulley blocks 3 includes a fixed pulley shaft 3-1, and four fixed pulleys 3-2 symmetrically mounted on the fixed pulley shaft 3-1 through bearings, wherein one fixed pulley 3-2 is arranged on the outer side of the web 1-1 of the hanging beam on the left and right sides, and two fixed pulleys 3-2 are arranged between the webs of the hanging beams on the left and right sides. -2; the number of the balancing pulley groups 4 is two sets, which are horizontally arranged side by side at the center of the fixed pulley shafts 3-1 of the two fixed pulley groups at the front and rear of the lower layer, and each set of balancing pulley groups 4 includes two balancing plates 4-1 for fitting the fixed pulley shafts, and two balancing pulley shafts 4-2 inserted at the front and rear ends of the two balancing plates (in the winding system of the present invention, the pulleys in the front movable pulley group, the front fixed pulley group, the rear movable pulley group, and the rear fixed pulley group in the quadruple pulley group all adopt a left-right symmetrical structure, and only the balancing pulley 4-3 in the balancing pulley group 4 adopts a left-right interval and The layout is arranged in a forward and backward translation manner: on the one hand, compared with the layout of the balancing pulleys 4-3 being symmetrical on the left and right, the left and right intervals between the balancing pulleys 4-3 can be reduced, thereby reducing the width of the double pulley block and the hook assembly 7, that is, reducing the size of the hook assembly 7; on the other hand, as long as there is a left and right interval between the front and rear balancing pulleys 4-3, the wire rope 8 can avoid crossing during the winding process, avoiding interference of the wire rope 8), two balancing pulleys 4-3 symmetrically mounted on each balancing pulley shaft through bearings; the number of the movable pulley block 5 is four sets (this is the magnification 6, The structure of the second embodiment of the quadruple pulley group, the structure of the second embodiment is implemented with a ratio greater than 6). It is divided into an upper and lower arrangement, and the two sets of movable pulley groups in the lower layer are horizontally installed side by side at the front and rear ends of the hook pull plate 6. The two sets of movable pulley groups 5 in the upper layer are hingedly connected to the two sets of movable pulleys in the lower layer through the connecting plate assembly 9, respectively. Each set of movable pulley groups 5 includes a movable pulley shaft 5-1 and six movable pulleys 5-2 symmetrically mounted on the movable pulley shaft through bearings, wherein a movable pulley 5-2 is arranged on the outer side of the left and right hook pull plates, and four movable pulleys 5-2 are arranged between the left and right hook pull plates.

[0046] In the second embodiment, the two steel wire ropes 8 wound off from the drum 2 on the upper layer on the left side are respectively wound around the movable pulley 5-2 in the movable pulley group 5 corresponding to the front and rear ends and located on the upper layer, the fixed pulley 3-2 in the fixed pulley group 3 located on the lower layer, and the balancing pulley 4-3 located on the right side of the balancing pulley group 4, and then wound around the movable pulley 5-2 in the movable pulley group 5 on the lower layer, and the fixed pulley 3-2 in the fixed pulley group 3 on the upper layer, and finally wound onto the drum 2 on the lower layer on the right side; the two steel wire ropes 8 wound off from the drum 2 on the lower layer on the left side are respectively wound around the movable pulley 5-2 in the movable pulley group 5 corresponding to the front and rear ends and located on the lower layer, the fixed pulley 3-2 in the fixed pulley group 3 on the upper layer, and the balancing pulley 4-3 located on the left side of the balancing pulley group 4, and then wound around the movable pulley 5-2 in the movable pulley group 5 on the upper layer, and the fixed pulley 3-2 in the fixed pulley group 3 on the lower layer, and finally wound onto the drum 2 on the upper layer on the right side.

[0047] In the second embodiment, the bottom diameter of the fixed pulley 3-2 in the fixed pulley block 3 located at the upper layer is larger than the outer edge of the fixed pulley 3-2 in the fixed pulley block 3 located at the lower layer (which can effectively avoid interference of the wire rope 8 during the winding process between the movable pulley block and the fixed pulley block); the bottom diameter of the movable pulley 5-2 in the movable pulley block 5 located at the lower layer is larger than the outer edge of the movable pulley 5-2 in the movable pulley block 5 located at the upper layer (which can effectively avoid interference of the wire rope 8 during the winding process between the movable pulley block and the fixed pulley block).

[0048] The connecting plate assembly 9 described in the second embodiment is composed of an upper connecting plate 9-1 and two lower connecting plates 9-2 fixed on the two surfaces of the lower part of the upper connecting plate (the two sets of movable pulley groups 5 on the upper layer are hingedly connected to the two sets of movable pulley groups 5 on the lower layer through the connecting plate assembly 9), and shaft 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 holes 9-3 on the upper part of the upper connecting plate are hung on the fixed pulley shaft 3-1, and the shaft holes 9-3 on the lower part of the lower connecting plate are hung on the movable pulley shaft 5-1).

[0049] The specific use of the present invention is as follows:

[0050] First, the lifting ratio is determined according to the weight of the large component to be lifted, and then the combination of the double drum and the double pulley block or the double drum and the quadruple pulley block is selected according to the lifting ratio, and then the structure and winding method of the first embodiment or the second embodiment are selected according to the combination mode; then, the corresponding components are assembled according to the selected embodiment structure - that is, the two sets of balancing pulley blocks 4 are respectively hung in the central axis plane of the two fixed pulley blocks 3 located on the lower layer, and the two sets of fixed pulley blocks 3 located on the lower layer are installed to the corresponding positions of the web plate 1-1 of the hanging beam (this is the first embodiment, if it is the second embodiment, two sets of fixed pulley blocks 3 on the upper layer can be added), Then install two sets of movable pulley blocks 5 on the upper end of the hook pull plate 6 (this is embodiment 1, if it is embodiment 2, the upper two sets of movable pulley blocks 5 are hingedly connected to the lower two sets of movable pulley blocks 5 through the connecting plate assembly 9), and install the hook assembly 7 on the lower end of the hook pull plate 6; wind the wire rope 8 in sequence according to the winding method of the wire rope 8 in embodiment 1 or embodiment 2; finally, start the drum 2 to rotate, and the wire rope 8 drives the corresponding pulleys in the movable pulley block 5, the fixed pulley block 3, and the balancing pulley block 4 to rotate, so as to drive the hook assembly 7 and the lifted large equipment to be lifted smoothly and accurately positioned.

Claims

1. A four-rope multi-rate winding system for a large bridge crane, characterized in that: The utility model comprises four drums (2) symmetrically arranged on the left and right outer sides of a suspension beam (1) and arranged in layers up and down, a plurality of fixed pulley blocks (3) mounted on the web plate (1-1) of the suspension beam, a balancing pulley block (4) mounted on the central axis plane of the fixed pulley block, a movable pulley block (5) mounted on the upper end of a suspension hook plate (6), a suspension hook assembly (7) mounted on the lower end of the suspension hook plate (6), and a steel wire rope (8) wound around the above components to form an integral whole; two steel wire ropes (8) wound from the drum (2) on the left upper layer are respectively wound around the movable pulley block, the fixed pulley block and the balancing pulley block corresponding to the front and rear ends, and then wound into the drum (2) on the right lower layer; the two steel wire ropes (8) wound from the drum (2) on the left lower layer are respectively wound around the front and rear ends, and then wound into the drum (2) on the right lower layer; The movable pulley blocks, fixed pulley blocks and balancing pulley blocks corresponding to the respective rear ends are then wound into the drum (2) on the upper layer on the right side, and the winding direction of each steel wire rope (8) is switched between clockwise and counterclockwise during the winding process; the number of the fixed pulley blocks (3) is two sets, which are horizontally installed side by side at the front and rear ends of the web plate (1-1) of the hanging beam, and each set of the fixed pulley blocks (3) comprises a fixed pulley shaft (3-1), six fixed pulleys (3-2) symmetrically mounted on the fixed pulley shaft (3-1) through bearings, wherein two fixed pulleys (3-2) are arranged on the outer sides of the web plates (1-1) of the hanging beams on the left and right sides, and two fixed pulleys (3-2) are arranged between the web plates of the hanging beams on the left and right sides; the number of the balancing pulley blocks (4) is two sets, which are horizontally installed side by side at the front and rear ends of the hanging beam webs (1-1) and the back of the hanging beam webs (1-1). The movable pulley groups (5) are horizontally and side by side at the center of the fixed pulley shafts (3-1) of the front and rear fixed pulley groups. Each set of balancing pulley groups (4) comprises two balancing plates (4-1) for fitting onto the fixed pulley shafts, two balancing pulley shafts (4-2) inserted at the front and rear ends of the two balancing plates, and two balancing pulleys (4-3) symmetrically fitted onto each balancing pulley shaft via bearings. The movable pulley groups (5) are in two sets and are horizontally and side by side at the front and rear ends of the hook pull plate (6). Each set of movable pulley groups (5) comprises a movable pulley shaft (5-1), ten movable pulleys (5-2) symmetrically fitted onto the movable pulley shaft via bearings, wherein two movable pulleys (5-2) are arranged on the outer sides of the hook pull plates (6) on the left and right sides, and the movable pulleys (5-3) are symmetrically fitted onto the movable pulley shafts via bearings. Six movable pulleys (5-2) are arranged between the plates; two steel wire ropes (8) wound from the drum (2) on the left upper layer are wound around the movable pulleys (5-2), fixed pulleys (3-2) and balancing pulleys (4-3) with even numbers in the movable pulley groups (5), fixed pulley groups (3) and balancing pulley groups (4) corresponding to the front and rear ends respectively, and then wound onto the drum (2) on the right lower layer; two steel wire ropes (8) wound from the drum (2) on the left lower layer are wound around the movable pulley groups (5), fixed pulley groups (3) and balancing pulley groups (4) with odd numbers in the movable pulley groups (5), fixed pulley groups (3-2) and balancing pulleys (4-3) corresponding to the front and rear ends respectively, and then wound onto the drum (2) on the right upper layer.

2. A four-rope multi-rate winding system for a large bridge crane, characterized in that: The utility model comprises four drums (2) symmetrically arranged on the left and right outer sides of a suspension beam (1) and arranged in layers up and down, a plurality of fixed pulley blocks (3) mounted on the web plate (1-1) of the suspension beam, a balancing pulley block (4) mounted on the central axis plane of the fixed pulley block, a movable pulley block (5) mounted on the upper end of a hook pull plate (6), a hook assembly (7) mounted on the lower end of the hook pull plate (6), and a steel wire rope (8) wound around the above components to form an integral whole; two steel wire ropes (8) wound from the drum (2) on the left upper layer are respectively wound around the movable pulley block, the fixed pulley block and the balancing pulley block corresponding to the front and rear ends, and then wound into the drum (2) on the right lower layer; the two steel wire ropes (8) wound from the drum (2) on the left lower ... The corresponding movable pulley block, fixed pulley block and balancing pulley block are then wound into the drum (2) on the upper layer on the right side, and the winding direction of each steel wire rope (8) is switched between clockwise and counterclockwise during the winding process; the number of the fixed pulley blocks (3) is four sets, which are arranged in two layers, and the two sets of fixed pulley blocks in each layer are horizontally installed side by side at the front and rear ends of the web plate (1-1) of the hanging beam, and each set of fixed pulley blocks (3) includes a fixed pulley shaft (3-1) and four fixed pulleys (3-2) symmetrically mounted on the fixed pulley shaft (3-1) through bearings, wherein one fixed pulley (3-2) is arranged on the outer side of the web plates (1-1) of the hanging beam on the left and right sides, and two fixed pulleys (3-2) are arranged between the web plates of the hanging beam on the left and right sides; the number of the balancing pulley blocks (4) is There are two sets of movable pulley assemblies (5), which are horizontally installed side by side at the center of the fixed pulley shafts (3-1) of the two fixed pulley assemblies at the front and rear ends of the lower layer, and each set of balancing pulley assemblies (4) comprises two balancing plates (4-1) for fitting the fixed pulley shafts, two balancing pulley shafts (4-2) inserted at the front and rear ends of the two balancing plates, and two balancing pulleys (4-3) symmetrically fitted on each balancing pulley shaft through bearings; there are four sets of movable pulley assemblies (5), which are arranged in upper and lower layers, and the two sets of movable pulley assemblies (5) at the lower layer are horizontally installed side by side at the front and rear ends of the hook pull plate (6), and the two sets of movable pulley assemblies (5) at the upper layer are respectively hingedly connected to the two sets of movable pulleys at the lower layer through connecting plate assemblies (9), and each set of movable pulley assemblies (5) comprises a movable pulley shaft (5-1), a movable pulley shaft (5-2) inserted at the front and rear ends of the two balancing plates, and a movable pulley shaft (5-3) symmetrically fitted on each balancing pulley shaft through bearings. Six movable pulleys (5-2) are sleeved on the movable pulley shaft, wherein one movable pulley (5-2) is arranged on the outer side of the left and right hook pull plates, and four movable pulleys (5-2) are arranged between the left and right hook pull plates; two steel wire ropes (8) wound from the drum (2) on the left upper layer are respectively wound around the movable pulleys (5-2) in the movable pulley group (5) on the upper layer corresponding to the front and rear ends, the fixed pulleys (3-2) in the fixed pulley group (3) on the lower layer, and the balancing pulley (4-3) on the right side of the balancing pulley group (4), and then wound around the movable pulleys (5-2) in the movable pulley group (5) on the lower layer, and the fixed pulleys (3-2) in the fixed pulley group (3) on the upper layer, and finally wound onto the drum (2) on the right lower layer;The two steel wire ropes (8) wound from the drum (2) on the left lower layer are respectively wound around the movable pulleys (5-2) in the movable pulley block (5) at the lower layer, which have corresponding front and rear ends, the fixed pulleys (3-2) in the fixed pulley block (3) on the upper layer, and the balancing pulley (4-3) on the left side of the balancing pulley block (4), and then wound around the movable pulley (5-2) in the movable pulley block (5) on the upper layer, and the fixed pulley (3-2) in the fixed pulley block (3) on the lower layer, and finally wound onto the drum (2) on the right upper layer; the bottom diameter of the fixed pulley (3-2) in the fixed pulley block (3) on the upper layer is larger than the outer edge of the fixed pulley (3-2) in the fixed pulley block (3) on the lower layer; the bottom diameter of the movable pulley (5-2) in the movable pulley block (5) on the lower layer is larger than the outer edge of the movable pulley (5-2) in the movable pulley block (5) on the upper layer. ; 3. A four-rope multi-rate winding system for a large bridge crane according to claim 1 or 2, characterized in that: The connecting plate assembly (9) is composed of an upper connecting plate (9-1) and two lower connecting plates (9-2) fixed to the two surfaces of the lower part of the upper connecting plate, and shaft holes (9-3) are processed on the upper part of the upper connecting plate and the lower part of the lower connecting plate.

4. A four-rope multi-rate winding system for a large bridge crane according to claim 1 or 2, characterized in that: A fixed pulley shaft mounting hole II (4-1-1) matching the outer diameter of the fixed pulley shaft is processed in the middle of the balance plate (4-1), and balance shaft mounting holes (4-1-2) matching the outer diameter of the balance pulley shaft are symmetrically processed on both sides of the balance plate.

5. A four-rope multi-rate winding system for a large bridge crane according to claim 1 or 2, characterized in that: Fixed pulley shaft mounting holes I (1-1-1) are processed on the web plate (1-1) of the suspension beam, the number, position and outer diameter of which match those of the fixed pulley shaft (3-1).

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