An intermediate luffing winding device

Abstract

The present invention provides an intermediate luffing winding device for the boom of a floating crane, comprising: a movable end pulley block, which is used for threading and connecting the top pulley block of the A-frame at one end of the floating crane; a fixed end pulley block, which is used for threading and connecting the boom head pulley block at the other end of the floating crane; and an intermediate luffing pulley frame, on both sides of which the fixed end pulley block and the movable end pulley block are respectively fixedly placed. According to the intermediate luffing winding device of the embodiment of the present invention, when in use, the luffing steel wire rope in the luffing winding system is divided into a fixed end and a movable end for separate connection, so as to change the length of the whole luffing winding system only by changing the winding length of the movable end steel wire rope. The operation is convenient, stable and reliable, and during later maintenance, only the movable end steel wire rope needs to be replaced. Compared with replacing the whole length of the steel wire rope, the use and maintenance costs are greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of floating crane manufacturing, and particularly relates to an intermediate luffing winding device. Background Art

[0002] The luffing wire rope system of a floating crane is the main component for the pitching movement of the boom. Generally, the winding method consists of a single-segment wire rope from the boom head pulley block to the derrick head pulley block. With the increase in the conventional lifting capacity and lifting height of the floating crane, the diameter and length of the luffing wire rope of the crane also increase accordingly. The single-segment winding wire rope is too long, making the luffing operation difficult and resulting in high later use and maintenance costs. Summary of the Invention

[0003] In view of this, the present invention provides an intermediate luffing winding device. When in use, the luffing wire rope in the luffing winding system is divided into a fixed end and a movable end for separate connection, so as to change the length of the entire luffing winding system only by changing the winding length of the movable end wire rope. The operation is convenient, stable and reliable, and during later maintenance, only the movable end wire rope needs to be replaced. Compared with replacing the entire wire rope length, the use and maintenance costs are greatly reduced.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The intermediate luffing winding device according to an embodiment of the present invention is used for the boom of a floating crane and includes:

[0006] A movable end pulley block for threading and connecting the derrick head pulley block at one end of the floating crane;

[0007] A fixed end pulley block for threading and connecting the boom head pulley block at the other end of the floating crane;

[0008] An intermediate luffing pulley frame, with the fixed end pulley block and the movable end pulley block fixedly placed on both sides of the intermediate luffing pulley frame respectively.

[0009] Further, the movable end pulley block includes a first large pulley block and a first small pulley block. The first large pulley block and the first small pulley block are arranged at one end of the intermediate luffing pulley frame. The first large pulley block is located inside one end of the intermediate luffing pulley frame, and the first small pulley block is located outside one end of the intermediate luffing pulley frame. The first large pulley block and the first small pulley block are connected to the derrick head pulley block through a movable end wire rope.

[0010] Further, after the first large pulley group and the first small pulley group pass the ropes through the top pulley group of the A-frame, they are also connected to a drum mechanism through the movable-end wire rope, and the drum mechanism is used to drive the rope winding and unwinding.

[0011] Further, the fixed-end pulley group includes a second large pulley group and a second small pulley group. The second large pulley group and the second small pulley group are arranged at the other end of the intermediate luffing pulley frame. The second large pulley group is located inside the other end of the intermediate luffing pulley frame, and the second small pulley group is located outside the other end of the intermediate luffing pulley frame. The second large pulley group and the second small pulley group are connected to the boom head pulley group through the fixed-end wire rope.

[0012] Further, the intermediate luffing winding device further includes a fixed support, and the intermediate luffing pulley frame is arranged on the fixed support, and the fixed support is used for fixing the position of the intermediate luffing pulley frame.

[0013] Further, the fixed support includes:

[0014] A base;

[0015] A plurality of support plates, and the plurality of support plates are vertically fixed on the base. The support plates are used to support the movable-end pulley group, the fixed-end pulley group and the intermediate luffing pulley frame;

[0016] A hoop device, and the hoop device is fixed on one side of the base. The hoop device is used to clamp and fix the movable-end pulley group from top to bottom;

[0017] A wire rope idler device, and the wire rope idler device is respectively arranged on the support plates on both sides of the base. The wire rope idler device is used for guiding the rope passing.

[0018] Further, at least three parallel support plates are taken as a group, and five groups of support plates are sequentially arranged in the length direction of the base. Between the five groups of support plates, the first small pulley group, the first large pulley group, the second large pulley group and the second small pulley group are respectively arranged at intervals from left to right.

[0019] Further, a fixed bracket is fixed on the third and fourth groups of support plates from left to right on the base. The fixed bracket includes:

[0020] Two support rods, and the two support rods are arranged vertically opposite to each other, and their bottoms are respectively fixedly welded on the side surfaces of the support plates outside a group of support plates;

[0021] A cross bar, and the two ends of the cross bar are horizontally fixed on the tops of the two support rods;

[0022] The fixing bracket is used to engage with the outer side of the intermediate luffing pulley bracket in the width direction.

[0023] Furthermore, a protective member is fixed to the top of the cross bar of the fixing bracket between the second large pulley group and the second small pulley group. The protective member is used to protect the cross bar from abrasion when the rope threading of the second large pulley group is not tightened.

[0024] Furthermore, the hoop device is composed of multiple U-shaped structural members. The multiple U-shaped structural members are arranged at intervals with a group of the support plates on one side of the base. The arc-shaped notches of the multiple U-shaped structural members are inverted and abutted against the pulley grooves of the movable end pulley group. The two bottom feet of the multiple U-shaped structural members are detachably connected to the base through bolts.

[0025] One of the beneficial effects of the above technical solution of the present invention is at least as follows:

[0026] In the intermediate luffing winding device of the embodiment of the present invention, the luffing steel wire rope in the original luffing winding system is divided into two sections: a fixed end and a movable end. The length of the fixed end steel wire rope wound around the connecting arm is fixed and unchanged. During the luffing process, only by changing the winding length of the movable end steel wire rope can the length of the entire luffing winding system be changed, so as to retract and extend the boom for luffing. It is simple and practical, and the operation is convenient.

[0027] In addition, the rope threading operation setting of the intermediate luffing winding device of the embodiment of the present invention enables only the movable end steel wire rope to be replaced during later maintenance and repair. Compared with replacing the entire length of the steel wire rope, the use and maintenance costs are greatly reduced. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the intermediate luffing winding device of the embodiment of the present invention;

[0029] Figure 2 is Figure 1 View A in

[0030] Figure 3 is Figure 1 Sectional view taken along line A-A in

[0031] Figure 4 is Figure 1 Sectional view taken along line B-B in

[0032] Figure 5 is Figure 1 Sectional view taken along line C-C in

[0033] Figure 6 is Figure 1 Sectional view taken along line D-D in

[0034] Figure 7 Structural schematic diagram of the fixed support of the intermediate luffing winding device according to an embodiment of the present invention;

[0035] Figure 8 Structural schematic diagram of the support plate of the fixed support of the intermediate luffing winding device according to an embodiment of the present invention;

[0036] Figure 9 is Figure 7 Cross-sectional view taken along line E-E in

[0037] Figure 10 is Figure 7 Cross-sectional view taken along line F-F in

[0038] Figure 11 is Figure 7 Cross-sectional view taken along line G-G in

[0039] Figure 12 Schematic diagram of the use state of the intermediate luffing winding device according to an embodiment of the present invention;

[0040] Figure 13 Schematic diagram of the rope threading of the fixed-end pulley block of the intermediate luffing winding device according to an embodiment of the present invention;

[0041] Figure 14 Schematic diagram of the rope threading of the movable-end pulley block of the intermediate luffing winding device according to an embodiment of the present invention.

[0042] Reference numerals: 100. First large pulley block; 200. First small pulley block; 300. Second large pulley block; 400. Second small pulley block; 500. Intermediate luffing pulley frame;

[0043] 600. Fixed support; 610. Base; 620. Support plate; 630. Hoop device; 640. Steel wire rope idler device; 650. Fixed bracket; 651. Support rod; 652. Cross bar; 660. Protective member;

[0044] 700. Movable-end steel wire rope; 800. Fixed-end steel wire rope;

[0045] 900. A-frame; 910. A-frame top pulley block;

[0046] 1000. Boom; 1010. Boom head pulley block;

[0047] 1100. Hull; 1110. Drum mechanism;

[0048] 1200. Ground fixing device. Detailed implementation manners

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0050] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second", and similar terms used in the present invention do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0051] First, the intermediate luffing winding device according to the embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

[0052] The intermediate luffing winding device of the embodiments of the present invention is used for the boom of a floating crane and includes: a movable-end pulley group, a fixed-end pulley group, and an intermediate luffing pulley frame 500.

[0053] Among them, the movable-end pulley group is used for threading and connecting the top pulley group 910 at one end of the derrick of the floating crane.

[0054] The fixed-end pulley group is used for threading and connecting the boom head pulley group 1010 at the other end of the floating crane.

[0055] The fixed-end pulley group and the movable-end pulley group are respectively fixedly placed on both sides of the intermediate luffing pulley frame 500.

[0056] As an example, as Figure 1 shown, the intermediate luffing winding device of the embodiments of the present invention includes a movable-end pulley group, a fixed-end pulley group, and an intermediate luffing pulley frame 500. The movable-end pulley group and the fixed-end pulley group are respectively fixedly installed on both sides of the intermediate luffing pulley frame 500. The movable-end pulley group passes through the movable-end wire rope 700 for connecting the top pulley group 910 at one end of the derrick of the floating crane. The fixed-end pulley group passes through the fixed-end wire rope 800 for connecting the boom head pulley group 1010 at the other end of the floating crane. When in use, the length of the fixed-end wire rope 800 remains fixed, and the luffing amplitude of the boom is changed by adjusting the winding length of the movable-end wire rope 700 on the movable-end pulley group.

[0057] The intermediate luffing winding device according to the embodiment of the present invention divides the whole luffing steel wire rope in the original luffing winding system into a fixed end and a movable end. The fixed-end steel wire rope 800 is wound around the fixed-end pulley block to connect the boom with a fixed length. During the luffing process, the length of the whole luffing winding system can be changed only by changing the winding length of the movable-end steel wire rope 700, so as to retract and extend the boom for luffing. It is simple and practical, convenient to operate, and effectively reduces the working intensity.

[0058] In addition, the rope threading operation setting of the intermediate luffing winding device according to the embodiment of the present invention enables only the movable-end steel wire rope 700 to be replaced during later maintenance. Compared with replacing the whole length of the steel wire rope, the use and maintenance costs are greatly reduced.

[0059] Furthermore, the movable-end pulley block includes a first large pulley block 100 and a first small pulley block 200. The first large pulley block 100 and the first small pulley block 200 are arranged at one end of the intermediate luffing pulley frame 500. The first large pulley block 100 is located inside one end of the intermediate luffing pulley frame 500, and the first small pulley block 200 is located outside one end of the intermediate luffing pulley frame 500. The first large pulley block 100 and the first small pulley block 200 are connected to the top pulley block 910 of the derrick by the movable-end steel wire rope 700.

[0060] That is to say, the first large pulley block 100 and the first small pulley block 200 are arranged at the movable-end pulley block to respectively thread the movable-end steel wire rope 700 and connect it to the top pulley block 910 of the derrick. The settings of the first large pulley block 100 and the first small pulley block 200 adapt to the lifting capacity of the floating crane and the wire rope ratio. By adjusting the winding length of the movable-end steel wire rope 700 passing through the first large pulley block 100 and the first small pulley block 200, that is, by adjusting the length of the movable-end steel wire rope 700 to adjust the distance between the movable-end pulley block and the top pulley block 910 of the derrick to adjust the luffing amplitude of the fixed-end boom, the adjustment is simple and reliable, and the working intensity is effectively reduced.

[0061] Furthermore, after the first large pulley block 100 and the first small pulley block 200 are threaded through the top pulley block 910 of the derrick, they are also connected to a drum mechanism 1110 by the movable-end steel wire rope 700. The drum mechanism 1110 is used to drive the rope winding and unwinding.

[0062] That is to say, the movable-end steel wire rope 700 passes through the first large pulley block 100, the first small pulley block 200, the top pulley block 910 of the derrick and the drum mechanism 1110 at the end in sequence. The drum mechanism 1110 at the end is used to drive the rope winding and unwinding of the movable-end steel wire rope 700, so as to adjust the luffing of the fixed-end boom.

[0063] Furthermore, the fixed-end pulley block includes a second large pulley block 300 and a second small pulley block 400. The second large pulley block 300 and the second small pulley block 400 are arranged at the other end on the intermediate luffing pulley bracket 500. The second large pulley block 300 is located inside the other end of the intermediate luffing pulley bracket 500, and the second small pulley block 400 is located outside the other end of the intermediate luffing pulley bracket 500. The second large pulley block 300 and the second small pulley block 400 are connected to the boom head pulley block 1010 through the fixed-end steel wire rope 800.

[0064] That is to say, the second large pulley block 300 and the second small pulley block 400 are arranged at the fixed-end pulley block end to respectively thread the fixed-end steel wire rope 800 and connect with the boom head pulley block 1010. The settings of the second large pulley block 300 and the second small pulley block 400 adapt to the lifting capacity of the floating crane and the wire rope ratio. The fixed length of the connection of the fixed-end steel wire rope 800 remains unchanged to ensure that the distance between the boom at the fixed end and the fixed-end pulley block remains unchanged, and the retraction and luffing of the boom are adjusted by driving the movable-end pulley block.

[0065] Furthermore, the intermediate luffing winding device further includes a fixed support 600. The intermediate luffing pulley bracket 500 is arranged on the fixed support 600, and the fixed support 600 is used for fixing the position of the intermediate luffing pulley bracket 500.

[0066] That is to say, the intermediate luffing pulley bracket 500 is fixed by the fixed support 600, which can prevent the problem that the intermediate luffing winding device is prone to displacement as the tightening force of the steel wire rope increases during rope threading.

[0067] Furthermore, the fixed support 600 includes: a base 610, a plurality of support plates 620, a hoop device 630, and a wire rope roller device 640.

[0068] Among them, a plurality of support plates 620 are vertically fixed on the base 610, and the support plates 620 are used to support the movable-end pulley block, the fixed-end pulley block, and the intermediate luffing pulley bracket 500.

[0069] The hoop device 630 is fixed on one side of the base 610, and the hoop device 630 is used to clamp and fix the movable-end pulley block from top to bottom.

[0070] The wire rope roller devices 640 are respectively arranged on the support plates 620 on both sides of the base 610, and the wire rope roller devices 640 are used for guiding the rope threading.

[0071] As an example, such as Figure 2-7As shown, the fixed support 600 is provided with a base 610. Along the length direction of the base 610, a plurality of support plates 620 are sequentially provided. The support plates 620 are used to support the movable end pulley block, the fixed end pulley block, and the intermediate luffing pulley bracket 500 at various positions on the base 610. On one side of the base 610 where the movable end pulley block is placed, a hoop device 630 is provided. The hoop device 630 is used to further clamp and fix the movable end pulley block from top to bottom when the support plate 620 supports the movable end pulley block. On the support plates 620 on both sides of the base 610, wire rope idler devices 640 are respectively provided for guiding the threading of the movable end wire rope 700 and the fixed end wire rope 800.

[0072] The setting of the fixing device 600 is mainly to effectively limit each pulley block and the intermediate luffing pulley bracket 500. On the other hand, it makes the structure compact and reliable, the threading is in order, and the durability of the device is improved.

[0073] Further, at least three parallel support plates 620 are taken as a group. Along the length direction of the base 610, five groups of support plates 620 are sequentially provided. Between the five groups of support plates 620, a first small pulley group 200, a first large pulley group 100, a second large pulley group 300, and a second small pulley group 400 are respectively spaced apart from left to right.

[0074] As an example, as Figure 2-8 shown, along the length direction of the base 610, five groups of support plates 620 are sequentially provided. Each group of support plates 620 is composed of three parallel support plates 620 in the width direction of the base 610. Such a setting enables the first small pulley group 200, the first large pulley group 100, the second large pulley group 300, and the second small pulley group 400 to be effectively and reliably supported and limited in turn.

[0075] Further, on the third and fourth groups of support plates 620 from left to right on the base 610, a fixed bracket 650 is fixed. The fixed bracket 650 includes: two support rods 651 and a cross bar 652.

[0076] Among them, the two support rods 651 are arranged relatively vertically, and their bottom ends are respectively fixed and welded to the side surface of the support plate 620 outside a group of support plates.

[0077] The two ends of the cross bar 652 are horizontally fixed to the top ends of the two support rods 651.

[0078] The fixed bracket 650 is used to clamp the outside of the intermediate luffing pulley bracket 500 in the width direction.

[0079] As an example, as shown in 1, 4, 5, 7, 9, and 10, fixing brackets 650 are fixed on the third and fourth sets of support plates 620 from left to right on the base 610. The fixing brackets are in a U shape and are used to further engage and fix the middle and the other end of the luffing pulley bracket 500 from the outside, forming an integral fixation together with the hoop device 630 at one end.

[0080] Furthermore, a protective member 660 is also fixed on the top of the cross bar 651 of the fixing bracket 650 between the second large pulley group 300 and the second small pulley group 400. The protective member 660 is used to protect the cross bar 651 from wear when the rope threading of the second large pulley group 300 is not tightened.

[0081] As an example, such as Figure 1 , 5 7, and 11, a protective member 660 is also fixed on the top of the cross bar 651 of the fixing bracket 650 between the second large pulley group 300 and the second small pulley group 400, which can protect the top cross bar 651 from being worn by the wire rope when the fixed end wire rope 800 is not tightened during threading of the second large pulley group 300.

[0082] Furthermore, the hoop device 630 is composed of multiple U-shaped structural members. The multiple U-shaped structural members are arranged at intervals with a set of support plates 620 on one side of the base 610. The arc-shaped notches of the multiple inverted U-shaped structural members are abutted against the pulley grooves of the movable end pulley group, and the two bottom feet of the multiple U-shaped structural members are detachably connected to the base 610 through bolts.

[0083] As an example, such as Figure 7 , 9 shown, the hoop device 630 is arranged at one end of the base 610 for placing the movable end pulley group, and includes multiple U-shaped structural members arranged in parallel at intervals with a set of support plates 620 on this side. After the movable end pulley group is placed on the support plates 620, the U-shaped structural members can further engage and fix the movable end pulley group from top to bottom, and the bottom ends of the U-shaped structural members are connected to the base 610 through bolts.

[0084] As an example, such as Figure 12As shown in the figure, the mechanism of the entire floating crane includes a hull 1100, a guy derrick 900, and a boom 1000. The guy derrick 900 is arranged at one end of the hull 1100, and the boom 1000 is arranged at the other end of the hull 1100 opposite to the guy derrick 900. At the tops of the guy derrick 900 and the boom 1000, there are respectively a guy derrick top pulley block 910 and a boom head pulley block 1010. The intermediate luffing winding device is arranged between the tops of the guy derrick 900 and the boom 1000. The movable end pulley block of the intermediate luffing winding device passes through the movable end wire rope 700 to connect to the guy derrick top pulley block 910 and extends to the winch mechanism 1110 at the bottom of the guy derrick 900. The fixed end pulley block of the intermediate luffing winding device passes through the fixed end wire rope 800 to connect to the boom head pulley block 1010. Thus, by driving the winch mechanism 1110 to change the winding length of the movable end wire rope 700, the hoisting luffing of the boom 1000 is carried out.

[0085] According to the embodiment of the present invention, the diameter of the fixed end wire rope on the boom side is Ф70mm, the total length is nearly 4000 meters, and the pulley ratio is 24 times. The diameter of the movable end wire rope is also Ф70mm, the total length is more than 3000 meters, and the pulley ratio is 32 times. According to the winding characteristics of the fixed end wire rope and the movable end wire rope and the manufacturing state of the boom structure, a reasonable wire rope threading plan is formulated to shorten the wire rope threading cycle, accelerate the project completion progress, and save production costs.

[0086] The usage plan steps of the embodiment of the present invention are as follows:

[0087] 1. First, it is the wire rope threading work of the fixed end pulley block. As Figure 13 shown, after the boom 1000 structure is manufactured, the intermediate luffing winding device is arranged on the ground jig, and its movable end pulley block end is connected and fixed to the ground fixing device through wire rope threading. Then, the fixed end wire rope 800 is threaded and assembled together with the boom head pulley block 1010 of the boom 1000.

[0088] 2. Then, it is the wire rope threading work of the fixed end pulley block. As Figure 14 shown, after the boom 1000 is threaded and assembled, the boom 1000 is placed on a specially designed tower on the hull, and then the wire rope threading of the movable end wire rope 700 with the guy derrick top pulley block 910 and the winch mechanism 1110 is carried out.

[0089] 3. Finally, after the intermediate luffing pulley block is fixed on the hull deck, the movable end winding wire rope is threaded in place and tightened. Then, the intermediate luffing pulley block is lifted and the wire rope is evened to complete the wire rope threading work.

[0090] The rope threading solution of the embodiment of the present invention divides the entire set of luffing wire rope threading work into two parts: the fixed end of the boom threading and the movable end of the guy derrick threading. The wire rope winding at the fixed end of the boom is threaded when the boom is placed on the ground, which can not only reduce high-altitude and water operations, but also shorten the luffing winding and threading time after the overall assembly of the boom; the luffing wire rope winding at the movable end of the guy derrick is similar to the traditional luffing wire rope winding form, and the conventional rope threading method is adopted. In this way, the complex work is simplified, which is beneficial to reducing risks and saving costs.

[0091] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An intermediate luffing winding device for the boom of a floating crane, comprising: A movable-end pulley block, which is used for threading and connecting the top pulley block of the A-frame at one end of the floating crane; A fixed-end pulley block, which is used for threading and connecting the boom head pulley block at the other end of the floating crane; An intermediate luffing pulley frame, with the fixed-end pulley block and the movable-end pulley block fixedly placed on both sides of the intermediate luffing pulley frame respectively. The movable-end pulley block includes a first large pulley block and a first small pulley block, which are arranged at one end of the intermediate luffing pulley frame. The first large pulley block is located inside one end of the intermediate luffing pulley frame, and the first small pulley block is located outside one end of the intermediate luffing pulley frame. The first large pulley block and the first small pulley block are connected to the top pulley block of the A-frame through a movable-end steel wire rope; A fixed support, on which the intermediate luffing pulley frame is arranged. The fixed support is used for fixing the position of the intermediate luffing pulley frame. The fixed support includes a base, multiple support plates and a hoop device. The multiple support plates are vertically fixed on the base, and the support plates are used for supporting the movable-end pulley block, the fixed-end pulley block and the intermediate luffing pulley frame; The hoop device is fixed on one side of the base, and the hoop device is used for clamping and fixing the movable-end pulley block from top to bottom; Wherein, after the first large pulley block and the first small pulley block pass through the top pulley block of the A-frame by threading, they are also connected to a drum mechanism through a movable-end steel wire rope, and the drum mechanism is used for driving the rope to wind in and out; The fixed-end pulley block includes a second large pulley block and a second small pulley block, which are arranged at the other end of the intermediate luffing pulley frame. The second large pulley block is located inside the other end of the intermediate luffing pulley frame, and the second small pulley block is located outside the other end of the intermediate luffing pulley frame. The second large pulley block and the second small pulley block are connected to the boom head pulley block through a fixed-end steel wire rope.

2. The intermediate luffing winding device according to claim 1, characterized in that, At least three parallelly arranged support plates are in a group, and five groups of such support plates are successively arranged in the length direction of the base. Between the five groups of support plates, the first small pulley block, the first large pulley block, the second large pulley block and the second small pulley block are respectively arranged at intervals from left to right in sequence.

3. The intermediate luffing winding device according to claim 2, characterized in that, On the third and fourth groups of support plates from left to right on the base, a fixed bracket is fixed. The fixed bracket includes: Two support rods, which are relatively vertically arranged, and their bottom ends are respectively fixedly welded on the side surface of the support plate outside a group of support plates; A cross bar, whose two ends are horizontally fixed on the top ends of the two support rods; The fixed bracket is used for clamping the outside of the intermediate luffing pulley frame in the width direction.

4. The intermediate luffing winding device according to claim 3, characterized in that, On the top of the cross bar of the fixed bracket between the second large pulley block and the second small pulley block, a protective part is also fixed. The protective part is used for protecting the cross bar from abrasion when the rope threading of the second large pulley block is not tightened.

5. The intermediate luffing winding device according to claim 1, characterized in that, the hoop device is a plurality of U-shaped structural members, the plurality of U-shaped structural members are arranged at intervals with a group of the support plates on one side of the base, the arc-shaped notches of the plurality of U-shaped structural members are inverted and abutted on the pulley grooves of the movable end pulley group, and the two feet of the plurality of U-shaped structural members are detachably connected to the base by bolts.

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