A luffing movable pulley block retracting and releasing device convenient for transition

Abstract

The present invention discloses a device for retracting and releasing a variable-length movable pulley block that is convenient for transfer, comprising a variable-length mechanism composed of a variable-length winch, a variable-length steel wire rope, a variable-length fixed pulley block and a variable-length movable pulley block, wherein a traction mechanism is bolted to a pull plate on a wheel seat in the variable-length movable pulley block; the traction mechanism is composed of a traction steel wire rope led out from a traction winch, which is wound through a traction fixed pulley and a traction movable pulley in sequence, and the lead-out end of the traction steel wire rope is fixed on a lifting guide wheel bracket in the middle of a crane arm. The present invention can be used to quickly realize the retracting and releasing switching of the variable-length movable pulley block between a fixed position and a predetermined position during the installation or disassembly of a tower crane, thereby eliminating the disassembly and assembly link of the variable-length movable pulley block, and eliminating the link of repeatedly winding or retracting the variable-length steel wire rope on site before and after the transfer, thereby greatly shortening the installation or disassembly time of a tower crane that needs to be transferred, and significantly improving the transfer efficiency of the tower crane.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting machinery, and more specifically relates to a luffing movable pulley block retracting and extending device which is convenient for site transfer. Background Art

[0002] As one of the main forces of global renewable energy, wind power generation is increasingly valued by countries around the world. As wind power generation equipment gradually develops in the direction of large-scale, higher towers, larger impellers, and larger capacities have put forward higher requirements on the performance of wind power hoisting equipment, especially the efficiency of equipment transfer, which directly affects the progress of the entire wind farm construction project. Relying on the successful development of the first domestic wind power hoisting equipment tower crane, compared with the steps of on-site installation and disassembly of the variable-length movable pulley block of the traditional tower crane, since the variable-length movable pulley block of this type of wind power hoisting equipment tower crane is fixed on the lower crossbeam of the front bracket of the A-frame, the variable-length steel wire rope can be threaded in advance and transported to the site together with the A-frame, so this type of wind power hoisting equipment tower crane saves the link of repeatedly threading and winding the variable-length steel wire rope on site. However, this type of wind power hoisting equipment tower crane still has some shortcomings during use: the luffing movable pulley block needs to be installed or disassembled on site during transfer, and it is difficult to efficiently install or disassemble the luffing movable pulley block by relying solely on an auxiliary crane on site, which greatly affects the transfer efficiency of the wind power hoisting equipment tower crane. Summary of the invention

[0003] The purpose of the present invention is to provide a luffing movable pulley block retracting and retracting device that is convenient for transfer in view of the deficiencies existing in the above-mentioned prior art. The present invention can quickly realize the retracting and retracting switching of the luffing movable pulley block between the fixed position and the predetermined position during the installation or disassembly of the tower crane, eliminating the disassembly and assembly steps of the luffing movable pulley block, and eliminating the steps of repeatedly winding or retracting the luffing steel wire rope on site before and after the transfer, greatly shortening the installation or disassembly time of the tower crane that needs to be transferred, and significantly improving the transfer efficiency of the tower crane.

[0004] The purpose of the present invention can be achieved by the following technical measures:

[0005] The present invention provides a luffing movable pulley block retracting and releasing device convenient for site transfer, comprising a luffing mechanism composed of a luffing winch, a luffing steel wire rope, a luffing fixed pulley block and a luffing movable pulley block, wherein a traction mechanism is bolted to a pull plate on a wheel seat in the luffing movable pulley block (so that in the process of installing or disassembling a tower crane, the luffing mechanism and the traction mechanism are in a cooperation mode of one active and one passive, one rope retracting and one rope loosening, so as to quickly realize the retracting and releasing switching of the luffing movable pulley block between a fixed position and a predetermined position, thereby eliminating the disassembly and assembly link of the luffing movable pulley block, and eliminating the link of repeatedly threading or retracting the luffing steel wire rope on site before and after the site transfer). , greatly shortening the installation or disassembly time of tower cranes that need to be transferred, and significantly improving the transfer efficiency of tower cranes); the traction mechanism is composed of a traction wire rope led out from a traction winch, which is wound around a traction fixed pulley and a traction movable pulley in sequence, and the lead-out end of the traction wire rope is fixed on the lifting guide wheel bracket in the middle of the boom (when the tower crane is installed in place after the transfer, the traction mechanism retracts the rope, and the luffing mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley group that is disconnected from the front bracket crossbeam of the A-frame after the fixed pin is removed is quickly and smoothly moved from the fixed position to the predetermined position, and then adjusted to the required working position position; before the tower crane needs to be transferred to another site for dismantling, the luffing mechanism collects the rope, the traction mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley block is quickly and smoothly moved from the predetermined position to the fixed position, and then the fixing pin shaft is inserted into the pin hole of the wheel seat pull plate of the luffing movable pulley block, and the luffing movable pulley block is fastened to the front support beam of the A-frame); the wheel seat pull plate is a long plate-shaped structure, one end of which is hung on the wheel axle of the luffing movable pulley, and the other end is provided with a pin hole for inserting the fixing pin shaft (before the tower crane needs to be transferred to another site for dismantling, when the luffing movable pulley block returns to the fixed position, the pin hole of the wheel seat pull plate is inserted into the pin hole of the wheel seat pull plate After the fixed pin is inserted inside, the variable-length movable pulley block can be fastened to the front support crossbeam of the A-frame, so that it can be transferred and transported together with the A-frame). An ear plate is fixed to the side end of the wheel seat pull plate, and a through hole is opened on the ear plate; the traction movable pulley is hung in the through hole of the ear plate through a connecting piece (after the traction movable pulley is connected to the variable-length movable pulley block through the connecting piece, the front and rear series connection of the variable-length mechanism and the traction mechanism is realized, so that the variable-length mechanism and the traction mechanism can cooperate with one active and one passive, one rope collection and the other rope loosening, to quickly realize the retraction and release switching of the variable-length movable pulley block between the fixed position and the predetermined position).

[0006] The connecting piece described in the present invention includes a hook head, a sling, and a shackle. The hook head is hinged on the support of the traction pulley, one end of the sling is buckled in the mounting hole of the ear plate through the shackle, and the other end is hung on the hook head (because the matching of the shackle and the sling, and the matching of the hook head and the sling have the characteristics of quick connection and quick disassembly and convenient operation, the connecting piece can realize the rapid connection or disassembly of the traction pulley and the variable amplitude movable pulley group, that is, the rapid series connection or disassembly of the variable amplitude mechanism and the traction mechanism).

[0007] The traction winch described in the present invention is installed on the front support crossbeam of the herringbone frame, and the traction fixed pulley is installed on the lifting guide wheel support.

[0008] The luffing winch described in the present invention is installed at the root of the rear pull rod of the herringbone frame, the luffing fixed pulley block is installed at the top of the herringbone frame, the luffing steel wire rope is led out from the luffing winch, repeatedly winds around the luffing fixed pulley block and the luffing movable pulley block in sequence, and the lead-out end is fixed on the top of the herringbone frame (when the tower crane is installed in place after the transfer, the traction mechanism collects the rope, the luffing mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley block that is disconnected from the front support beam of the herringbone frame after the fixed pin is removed is quickly and smoothly moved from the fixed position to the predetermined position, and then adjusted to the required working position; before the tower crane needs to be transferred and dismantled, the luffing mechanism collects the rope, the traction mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley block is quickly and smoothly moved from the predetermined position to the fixed position, and then the fixed pin is inserted into the pin hole of the wheel seat pull plate of the luffing movable pulley block, and the luffing movable pulley block is fastened to the front support beam of the herringbone frame).

[0009] The design principle of the present invention is as follows:

[0010] The present invention has a traction mechanism bolted to the rear of the luffing movable pulley block. The traction mechanism and the luffing mechanism cooperate in a mode in which one is active and the other is passive, and one is for collecting ropes and the other is for releasing ropes. In the process of disassembling or installing the tower crane before or after the tower crane is transferred, the luffing movable pulley block can be quickly switched between a fixed position and a predetermined position, thereby eliminating the steps of disassembling and assembling the luffing movable pulley block, and eliminating the steps of repeatedly threading or collecting the luffing steel wire rope on site before and after the transfer. This greatly shortens the installation or disassembly time of the tower crane that needs to be transferred, and significantly improves the transfer efficiency of the tower crane.

[0011] More specifically, the present invention only needs to thread and wind the luffing wire rope when it is used for the first time, that is, the luffing wire rope is led out from the luffing winch in the form of a rope out, bypasses the luffing fixed pulley block located at the top of the A-frame, and then bypasses the luffing movable pulley block connected to the traction movable pulley in the traction mechanism, and is threaded and wound back and forth between the luffing fixed pulley block and the luffing movable pulley block for several times, and finally the lead-out end of the luffing wire rope is fixed to the top of the A-frame. In the subsequent transfer process, there is no need to disassemble or re-thread the luffing wire rope, which saves the link of repeatedly threading or retracting the luffing wire rope on site before and after the transfer, greatly shortens the installation or disassembly time of the tower crane that needs to be transferred, and significantly improves the transfer efficiency of the tower crane.

[0012] When the tower crane is installed in place after transfer, the traction mechanism retracts the rope and the luffing mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley block that is disconnected from the front support beam of the A-frame after the fixed pin is removed is quickly and smoothly moved from the fixed position to the predetermined position, and then adjusted to the required working position; before the tower crane needs to be transferred and dismantled, the luffing mechanism retracts the rope and the traction mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley block is quickly and smoothly moved from the predetermined position to the fixed position, and then the fixed pin is inserted into the pin hole of the wheel seat pull plate of the luffing movable pulley block, and the luffing movable pulley block is fastened to the front support beam of the A-frame. In this way, through the cooperation mode of the traction mechanism and the luffing mechanism, one active and one passive, one rope retracting and the other rope loosening, the luffing movable pulley group can be quickly switched between the fixed position and the predetermined position, eliminating the disassembly and assembly process of the luffing movable pulley group, and eliminating the process of repeatedly threading or retracting the luffing wire rope on site before and after the transfer, greatly shortening the installation or disassembly time of the tower crane that needs to be transferred, and significantly improving the transfer efficiency of the tower crane.

[0013] The beneficial technical effects of the present invention are as follows:

[0014] The present invention is a luffing movable pulley block retracting and releasing device that is convenient for site transfer. The present invention can quickly realize the retracting and releasing switching of the luffing movable pulley block between a fixed position and a predetermined position during the process of installing or disassembling a tower crane, thereby eliminating the steps of disassembling and installing the luffing movable pulley block, and eliminating the steps of repeatedly threading or retracting the luffing steel wire rope on site before and after the site transfer, thereby greatly shortening the installation or disassembly time of the tower crane that needs to be transferred, and significantly improving the transfer efficiency of the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention (the variable amplitude movable pulley block is in the working position).

[0016] Figure 2 It is a schematic diagram of the state when the variable amplitude movable pulley block in the present invention is in a predetermined position.

[0017] Figure 3 It is a schematic diagram of the state when the variable amplitude movable pulley block in the present invention is in a fixed position.

[0018] Figure 4 It is a schematic diagram of the rope winding of the traction mechanism in the present invention and a schematic diagram of the connection between the traction mechanism and the variable amplitude movable pulley block.

[0019] Figure 5 It is a detailed structural diagram of the connection portion between the traction movable pulley and the variable amplitude movable pulley block in the present invention.

[0020] Explanation of the serial numbers in the figure: 1. luffing winch, 2. luffing wire rope, 3. luffing fixed pulley block, 4. luffing movable pulley block, 4-1. Wheel seat pull plate, 4-1-1. Pin hole, 4-2. Ear plate, 4-2-1. Mounting hole, 4-3. Luffing movable pulley axle, 5. Traction winch, 6. Traction wire rope, 7. Traction fixed pulley, 8. Traction movable pulley, 9. A-frame, 9-1. Front support beam, 10. Crane arm, 11. Lifting guide wheel bracket, 12. Auxiliary crane, 13. Predetermined position, 14. Shackle, 15. Hook, 16. Sling. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] like Figure 1 to Figure 5The present invention discloses a luffing movable pulley block retracting and releasing device for facilitating site transfer, comprising a luffing mechanism composed of a luffing winch (1), a luffing steel wire rope (2), a luffing fixed pulley block (3) and a luffing movable pulley block (4), wherein a traction mechanism is bolted to a wheel seat pull plate (4-1) in the luffing movable pulley block (4) (so that during the process of installing or disassembling a tower crane, the luffing mechanism and the traction mechanism cooperate in a mode of one active and one passive, one rope retracting and one rope loosening, to quickly realize the retracting and releasing switching of the luffing movable pulley block (4) between a fixed position and a predetermined position, thereby eliminating the steps of disassembling and assembling the luffing movable pulley block, and eliminating the steps of repeatedly threading or retracting the luffing steel wire rope on site before and after the site transfer, thereby greatly shortening the installation or disassembly time of the tower crane that needs to be transferred, and significantly improving the efficiency of the tower crane. The traction mechanism is composed of a traction wire rope (6) led out from a traction winch (5) and wound around a traction fixed pulley (7) and a traction movable pulley (8) in sequence, and the lead-out end of the traction wire rope (6) is fixed to a lifting guide wheel bracket (11) in the middle of a crane arm (10) (when the tower crane is installed in place after the transfer, the traction mechanism collects the rope, and the luffing mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane (12), the luffing movable pulley group (4) that is disconnected from the front bracket crossbeam (9-1) of the herringbone frame (9) after the fixed pin is removed is quickly and smoothly moved from a fixed position to a predetermined position, and then adjusted to a desired working position; before the tower crane needs to be transferred and disassembled, the luffing mechanism collects the rope, the traction mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane (12), the luffing movable pulley group (4) that is disconnected from the front bracket crossbeam (9-1) of the herringbone frame (9) ... The rope is loosened at the same time, and with the help of an external auxiliary crane (12), the variable-length movable pulley block (4) is quickly and smoothly moved from a predetermined position to a fixed position, and then a fixing pin is inserted into the pin hole of the wheel seat pull plate (4-1) of the variable-length movable pulley block (4), and the variable-length movable pulley block (4) is fastened to the front support crossbeam (9-1) of the herringbone frame (9); the wheel seat pull plate (4-1) is a long plate-shaped structure, one end of which is hung on the variable-length movable pulley axle (4-3), and the other end is provided with a pin hole (4-1-1) for inserting the fixing pin (before the tower crane needs to be transferred to another site for dismantling, when the variable-length movable pulley block (4) returns to the fixed position, the variable-length movable pulley can be fastened to the front support crossbeam (9-1) of the herringbone frame (9) after the fixing pin is inserted into the pin hole (4-1-1) of the wheel seat pull plate (4-1) The group (4) is fastened to the front support crossbeam (9-1) of the herringbone frame (9), so that it can be transported together with the herringbone frame (9)), an ear plate (4-2) is fixed to the side end of the wheel seat pull plate (4-1), and a through hole (4-2-1) is opened on the ear plate (4-2); the traction pulley (8) is hung in the through hole (4-2-1) of the ear plate (4-2) through a connecting piece (after the traction pulley (8) is connected to the variable-length movable pulley group (4) through the connecting piece, the variable-length mechanism and the traction mechanism are connected in series front and back, so that the variable-length mechanism and the traction mechanism can cooperate with each other, one actively and the other passively, one to collect the rope and the other to release the rope, so as to quickly realize the retraction and release switching of the variable-length movable pulley group (4) between the fixed position and the predetermined position).

[0023] The connecting member of the present invention comprises a hook (15), a sling (16), and a shackle (14). The hook (15) is hinged on a support of the traction pulley (8). One end of the sling (16) is buckled into a through hole (4-2-1) of the ear plate (4-2) through the shackle (14), and the other end is hung on the hook (15) (see Figure 5 Since the matching of the shackle (14) and the sling (16), and the matching of the hook (15) and the sling (16) are characterized by quick connection and quick release and convenient operation, the connection piece can realize the quick connection or disassembly of the traction movable pulley (8) and the variable amplitude movable pulley block (4), that is, realize the quick series connection or disassembly of the variable amplitude mechanism and the traction mechanism).

[0024] The traction winch (5) of the present invention is installed on the front support beam (9-1) of the herringbone frame (9), and the traction fixed pulley (7) is installed on the lifting guide wheel bracket (11).

[0025] The variable-length winch (1) of the present invention is installed at the root of the rear pull rod of the herringbone frame (9), the variable-length fixed pulley block (3) is installed at the top of the herringbone frame (9), the variable-length steel wire rope (2) is led out from the variable-length winch (1), repeatedly wound around the variable-length fixed pulley block (3) and the variable-length movable pulley block (4) in sequence, and the lead-out end is fixed to the top of the herringbone frame (9) (when the tower crane is installed in place after the transfer, the traction mechanism collects the rope, the variable-length mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane (12), the fixed pin shaft is removed and the front bracket of the herringbone frame (9) is quickly and smoothly connected to the wire rope. The luffing movable pulley block (4) disconnected from the crossbeam (9-1) is moved from a fixed position to a predetermined position, and then adjusted to a desired working position; when it is necessary to transfer and dismantle the tower crane, the luffing mechanism collects the rope, the traction mechanism cooperates to loosen the rope, and with the help of an external auxiliary crane, the luffing movable pulley block (4) is quickly and smoothly moved from the predetermined position to the fixed position, and then a fixing pin is inserted into the pin hole of the wheel seat pull plate (4-1) of the luffing movable pulley block (4), and the luffing movable pulley block (4) is fastened to the front support crossbeam (9-1) of the herringbone frame (9).

[0026] The specific use of the present invention is as follows:

[0027] When the present invention is used for the first time, it is necessary to complete the threading and winding of the luffing steel wire rope (2) in the luffing mechanism (the luffing steel wire rope (2) only needs to be threaded and wound when it is used for the first time, and does not need to be disassembled or rethreaded during the subsequent transfer process). The luffing steel wire rope (2) in the luffing mechanism is threaded and wound as follows: the luffing steel wire rope (2) is led out from the luffing winch (1) in a downward rope-out manner, passes around the luffing fixed pulley block (3) located at the top of the herringbone frame (9), and then passes around the luffing movable pulley block (4) hingedly connected to the traction movable pulley (8) in the traction mechanism, and is threaded and wound back and forth between the luffing fixed pulley block (3) and the luffing movable pulley block (4) for several times, and finally the lead-out end of the luffing steel wire rope (2) is fixed to the top of the herringbone frame (9).

[0028] When the tower crane is transferred to a new construction site and the herringbone frame (9) and the boom (10) are installed in place, the traction wire rope (6) is firstly threaded and wound. The traction wire rope (6) in the traction mechanism is threaded and wound in the following manner: the traction wire rope (6) is led out from the upper side of the drum of the traction winch (5) - that is, the upper outgoing rope, passes around the traction fixed pulley (7) located on the lifting guide wheel bracket (11) of the boom (10), and then passes around the traction movable pulley (8) connected to the ear plate (4-2) of the variable amplitude movable pulley block (4) through the sling (16). Finally, the lead-out end of the traction wire rope (6) is fixedly connected to the lifting guide wheel bracket (11). Next, the fixed pin inserted in the pin hole (4-1-1) of the wheel seat pull plate (4-1) is pulled out, and the luffing movable pulley block (4) is disconnected from the front support beam (9-1) of the herringbone frame (9). The traction mechanism collects the rope, and the luffing mechanism cooperates to loosen the rope. With the help of an external auxiliary crane (12), the luffing movable pulley block (4) is quickly and smoothly moved from the fixed position to the predetermined position (13), and then adjusted to the desired working position.

[0029] When the tower crane needs to be moved to another site for disassembly after the project is completed, the luffing winch (1) is started to reel in the rope, and the traction winch (5) is started to reversely loosen the rope for coordination, and with the help of an external auxiliary crane (12), the luffing movable pulley block (4) is quickly and smoothly moved from the working position to the fixed position - the front support beam (9-1) of the herringbone frame (9). A fixed pin is inserted into the pin hole (4-1-1) of the pull plate (4-1) of the middle wheel seat of the luffing movable pulley block (4), so that the luffing movable pulley block (4) is fastened to the front support beam (9-1) of the herringbone frame (9). Subsequently, the lead-out end of the traction wire rope (6) fixedly connected to the lifting guide wheel bracket (11) is untied, and the traction winch (5) is started to loosen the rope, and the traction wire rope (6) is reeled in and wound onto the traction winch (5). In this way, the luffing mechanism and the traction winch (5), the traction wire rope (6) and the traction movable pulley (8) are transported together with the herringbone frame (9), and the traction fixed pulley (7) and the crane arm (10) are transported together.

Claims

1. A luffing movable pulley block retracting and releasing device for facilitating field transfer, comprising a luffing mechanism consisting of a luffing winch (1), a luffing steel wire rope (2), a luffing fixed pulley block (3) and a luffing movable pulley block (4), characterized in that: A traction mechanism is bolted to the wheel seat pull plate (4-1) in the variable-length movable pulley block (4); the traction mechanism is composed of a traction wire rope (6) led out from a traction winch (5) and wound around a traction fixed pulley (7) and a traction movable pulley (8) in sequence, and the lead-out end of the traction wire rope (6) is fixed to a lifting guide wheel bracket (11) in the middle of a crane arm (10); the wheel seat pull plate (4-1) is a long plate-shaped structure, one end of which is hung on the variable-length movable pulley axle (4-3) and the other end of which is provided with a pin hole (4-1-1) for inserting a fixing pin shaft, and an ear plate (4-2) is fixed to the side end of the wheel seat pull plate (4-1), and the ear plate (4-2) is fixed to the side end of the wheel seat pull plate (4-1). 2) is provided with a through hole (4-2-1); the traction pulley (8) is hung in the through hole (4-2-1) of the ear plate (4-2) through a connecting piece; the connecting piece comprises a hook head (15), a sling (16), and a shackle (14); the hook head (15) is hinged on a support of the traction pulley (8); one end of the sling (16) is buckled in the through hole (4-2-1) of the ear plate (4-2) through the shackle (14), and the other end is hung on the hook head (15); the traction winch (5) is mounted on the front support beam (9-1) of the herringbone frame (9), and the traction fixed pulley (7) is mounted on the lifting guide wheel bracket (11).

2. The device for retracting and releasing a variable-length movable pulley block for convenient transition according to claim 1, characterized in that: The luffing winch (1) is mounted at the root of the rear pull rod of the herringbone frame (9), the luffing fixed pulley block (3) is mounted at the top of the herringbone frame (9), and the luffing steel wire rope (2) is led out from the luffing winch (1), repeatedly wound around the luffing fixed pulley block (3) and the luffing movable pulley block (4) in sequence, and the lead-out end is fixed at the top of the herringbone frame (9).

Images