CN110963425A - Amplitude-variable movable pulley block retracting device convenient for transition - Google Patents
Amplitude-variable movable pulley block retracting device convenient for transition Download PDFInfo
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- CN110963425A CN110963425A CN202010013056.6A CN202010013056A CN110963425A CN 110963425 A CN110963425 A CN 110963425A CN 202010013056 A CN202010013056 A CN 202010013056A CN 110963425 A CN110963425 A CN 110963425A
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- amplitude
- variable
- movable pulley
- traction
- pulley block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
- B66C23/821—Bracing equipment for booms
- B66C23/826—Bracing equipment acting at an inclined angle to vertical and horizontal directions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
- B66D1/20—Chain, belt, or friction drives, e.g. incorporating sheaves of fixed or variable ratio
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a variable-amplitude movable pulley block retracting device convenient for transition, which comprises a variable-amplitude mechanism consisting of a variable-amplitude winch, a variable-amplitude steel wire rope, a variable-amplitude fixed pulley block and a variable-amplitude movable pulley block, wherein a traction mechanism is bolted to a wheel seat pulling plate in the variable-amplitude movable pulley block; the traction mechanism is formed by sequentially winding a traction steel wire rope led out from a traction winch through a traction fixed pulley and a traction movable pulley, and the leading-out end of the traction steel wire rope is fixed on a lifting guide wheel bracket in the middle of the crane boom. The invention can quickly realize the retraction and extension switching of the variable-amplitude movable pulley block between the fixed position and the preset position in the process of installing or disassembling the tower crane, saves the link of disassembling and assembling the variable-amplitude movable pulley block, saves the link of repeatedly penetrating or furling the variable-amplitude steel wire rope on site before and after the transition, greatly shortens the time of installing or disassembling the tower crane needing the transition, and obviously improves the transition efficiency of the tower crane.
Description
Technical Field
The invention belongs to the technical field of hoisting machinery, and particularly relates to a variable-amplitude movable pulley block retracting device convenient for transition.
Background
Wind power generation is increasingly gaining attention from countries around the world as one of the major forces of global renewable energy. With the gradual development of wind power generation equipment towards large-scale, higher towers, larger impellers and larger capacity put higher requirements on the service performance of wind power hoisting equipment, especially the equipment transition efficiency, and directly influence the engineering progress of the whole wind farm construction. Compared with the step of mounting and dismounting the amplitude-variable movable pulley block on the site of a traditional tower crane, the amplitude-variable movable pulley block of the tower crane for the wind power hoisting equipment is fixed on the lower cross beam of the front support of the propeller strut, so that the amplitude-variable steel wire rope can be wound in advance and transported to the site together with the propeller strut, and the link of repeatedly winding the amplitude-variable steel wire rope on the site is omitted. However, the tower crane of the wind power hoisting equipment has the following defects in the using process: the variable-amplitude movable pulley block is required to be mounted or dismounted on site during transition, and the variable-amplitude movable pulley block is difficult to be mounted or dismounted efficiently on site by only depending on an auxiliary crane, so that the transition efficiency of the tower crane of the wind power hoisting equipment is greatly influenced.
Disclosure of Invention
The invention aims to provide the variable-amplitude movable pulley block retracting device convenient for transition aiming at the defects in the prior art. The invention can quickly realize the retraction and extension switching of the variable-amplitude movable pulley block between the fixed position and the preset position in the process of installing or disassembling the tower crane, saves the link of disassembling and assembling the variable-amplitude movable pulley block, saves the link of repeatedly penetrating or furling the variable-amplitude steel wire rope on site before and after the transition, greatly shortens the time of installing or disassembling the tower crane needing the transition, and obviously improves the transition efficiency of the tower crane.
The object of the invention can be achieved by the following technical measures:
the invention relates to a luffing movable pulley block retracting device convenient for transition, which comprises a luffing mechanism consisting of a luffing winch, a luffing steel wire rope, a luffing fixed pulley block and a luffing movable pulley block, wherein a wheel seat pulling plate in the luffing movable pulley block is connected with a traction mechanism in a bolting mode (in the process of installing a tower crane or disassembling the tower crane, the luffing mechanism and the traction mechanism rapidly realize the retracting and releasing switching of the luffing movable pulley block between a fixed position and a preset position in a matching mode of driving one to be driven and withdrawing one to be loosened, the dismounting and mounting link of the luffing movable pulley block is omitted, the link of repeatedly penetrating and winding or furling the luffing steel wire rope on site before and after the transition is omitted, the installing or disassembling time of the tower crane needing the transition is greatly shortened, and the transition efficiency of the tower; the traction mechanism is composed of a traction steel wire rope led out from a traction winch and sequentially wound by a traction fixed pulley and a traction movable pulley, the leading-out end of the traction steel wire rope is fixed on a lifting guide wheel bracket in the middle of a cargo boom (when the tower crane is installed in place after a transition, the rope is taken up by the traction mechanism and a luffing mechanism is matched to loosen the rope, an luffing movable pulley block which is disconnected with a front bracket beam of an A-bracket after a fixed pin shaft is dismantled is quickly and stably moved to a preset position by an external auxiliary crane, and then is adjusted to a required working position, when the tower crane needs to be dismantled in the transition, the rope is taken up by the luffing mechanism and the traction mechanism is matched to loosen the rope, the luffing movable pulley block is quickly and stably moved to the fixed position by the external auxiliary crane, and then the fixed pin shaft is inserted into a pulley seat pulling plate pin hole of the luffing movable, the variable-amplitude movable pulley block is fastened on a front support beam of the propeller strut; the wheel seat pulling plate is of a long strip plate-shaped structure, one end of the wheel seat pulling plate is hung on the axle of the amplitude variable movable pulley, and the other end of the wheel seat pulling plate is provided with a pin hole for inserting a fixed pin shaft (before the tower crane needs to be transferred and disassembled, after the amplitude variable movable pulley block returns to a fixed position, the amplitude variable movable pulley block can be fastened on a front bracket cross beam of the propeller strut after the fixed pin shaft is inserted in the pin hole of the wheel seat pulling plate, so that the propeller strut can be transferred and transported together with the propeller strut), an ear plate is fixed at the side end of the wheel seat pulling plate, and a penetrating device; 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 with the amplitude-variable movable pulley block through the connecting piece, the front-back series connection of the amplitude-variable mechanism and the traction mechanism is realized, so that the amplitude-variable mechanism and the traction mechanism can be matched by one active rope and one passive rope and one rope-releasing rope, and the retraction and release switching of the amplitude-variable movable pulley block between a fixed position and a preset position is quickly realized).
The connecting piece comprises a hook head, a hanging strip and a shackle, wherein the hook head is hinged on a support of the traction movable pulley, one end of the hanging strip is buckled in a through hole of the ear plate through the shackle, and the other end of the hanging strip is hung on the hook head (due to the fact that the shackle is matched with the hanging strip and the matching of the hook head and the hanging strip has the characteristics of quick connection and quick detachment and convenient operation, the connecting piece can realize quick connection or detachment of the traction movable pulley and the amplitude-variable movable pulley block by utilization of the connecting piece, namely quick series connection or detachment of the amplitude-variable mechanism and the traction mechanism is realized).
The traction winch is arranged on a front support beam of the A-bracket, and the traction fixed pulley is arranged on a lifting guide wheel support.
The variable-amplitude winch is arranged at the root part of a rear pull rod of a propeller strut, the variable-amplitude fixed pulley block is arranged at the top part of the propeller strut, the variable-amplitude steel wire rope is led out from the variable-amplitude winch, and is sequentially and repeatedly wound through the variable-amplitude fixed pulley block, the variable-amplitude movable pulley block and the leading-out end head to be fixed at the top part of the propeller strut (when the tower crane is arranged in place after a transition, the rope is loosened by the cooperation of the traction mechanism and the variable-amplitude mechanism, the rope is quickly and stably moved to a preset position from the fixed position by the aid of an external auxiliary crane after a fixed pin shaft is dismantled, and then the rope is adjusted to a required working position, when the tower crane needs to be dismantled in the transition, the rope is loosened by the cooperation of the variable-amplitude mechanism and the traction mechanism, and the variable-amplitude movable pulley block is quickly and, and then inserting a fixed pin shaft into a pin hole of a wheel seat pulling plate of the variable-amplitude movable pulley block, and fastening the variable-amplitude movable pulley block on a front support beam of the propeller strut).
The design principle of the invention is as follows:
according to the invention, the traction mechanism is bolted at the back of the amplitude-variable movable pulley block, and the traction mechanism and the amplitude-variable mechanism are in a matching mode of one active rope and one passive rope and one rope-taking-up and one rope-loosing, so that the retraction and release switching of the amplitude-variable movable pulley block between the fixed position and the preset position is quickly realized in the process of dismounting or mounting the tower crane before and after the tower crane is transferred, the dismounting and mounting link of the amplitude-variable movable pulley block is omitted, the link of repeatedly passing or drawing in the amplitude-variable steel wire rope on site before and after the transfer is omitted, the mounting or dismounting time of the tower crane needing the transfer is greatly shortened, and.
More specifically, the variable-amplitude steel wire rope only needs to be wound in a penetrating mode when the variable-amplitude steel wire rope is used for the first time, namely the variable-amplitude steel wire rope is led out in a rope outgoing mode from the lower portion of the variable-amplitude winch, bypasses a variable-amplitude fixed pulley block positioned at the top of the propeller strut, then passes through a variable-amplitude movable pulley block connected with a traction movable pulley in the traction mechanism, passes through and winds between the variable-amplitude fixed pulley block and the variable-amplitude movable pulley block for a plurality of times back and forth, and finally the leading-out end of. In the subsequent transition process, the variable-amplitude steel wire rope does not need to be disassembled and reeved, so that the link of repeatedly reeving or furling the variable-amplitude steel wire rope on site before and after the transition is omitted, the time for assembling or disassembling the tower crane needing the transition is greatly shortened, and the transition efficiency of the tower crane is obviously improved.
When the tower crane is installed in place after a transition, the rope is taken up by the traction mechanism and the luffing mechanism is matched for releasing the rope, and the luffing movable pulley block which is disconnected with the front bracket beam of the propeller strut after the fixed pin shaft is removed is quickly and stably moved to a preset position from a fixed position by an external auxiliary crane, and then is adjusted to a required working position; before the tower crane needs to be disassembled in a transition, the amplitude variation mechanism is used for rope collection and the traction mechanism is matched for rope loosening, the amplitude variation movable pulley block is quickly and stably moved to a fixed position from a preset position by an external auxiliary crane, then a fixed pin shaft is inserted into a pin hole of a wheel seat pull plate of the amplitude variation movable pulley block, and the amplitude variation movable pulley block is fastened on a front support beam of the propeller strut. Therefore, the traction mechanism and the luffing mechanism are matched in a mode of one active and one passive, one rope taking-up and one rope loosing, the winding and unwinding switching of the luffing movable pulley block between the fixed position and the preset position can be quickly realized, the dismounting link of the luffing movable pulley block is omitted, the link of repeatedly winding or furling a luffing steel wire rope on the site before and after a transition is omitted, the mounting or dismounting time of a tower crane needing the transition is greatly shortened, and the transition efficiency of the tower crane is obviously improved.
The invention has the following beneficial technical effects:
the invention relates to a variable-amplitude movable pulley block retracting device convenient for transition. The invention can quickly realize the retraction and extension switching of the variable-amplitude movable pulley block between the fixed position and the preset position in the process of installing or disassembling the tower crane, saves the link of disassembling and assembling the variable-amplitude movable pulley block, saves the link of repeatedly penetrating or furling the variable-amplitude steel wire rope on site before and after the transition, greatly shortens the time of installing or disassembling the tower crane needing the transition, and obviously improves the transition efficiency of the tower crane.
Drawings
Fig. 1 is a schematic structural diagram of the invention (the variable-amplitude movable pulley block is in a working position).
Fig. 2 is a schematic view of the variable-amplitude movable pulley block in the invention in a preset position.
Fig. 3 is a schematic view of the variable-amplitude movable pulley block in the fixed position.
Fig. 4 is a schematic diagram of the rope winding of the traction mechanism and the connection of the traction mechanism and the amplitude-variable movable pulley block in the invention.
FIG. 5 is a detailed structure diagram of the connection part of the traction movable pulley and the amplitude-variable movable pulley block in the invention.
The sequence numbers in the figures illustrate: 1. the device comprises an amplitude-variable winch, 2, an amplitude-variable steel wire rope, 3, an amplitude-variable fixed pulley block, 4, an amplitude-variable movable pulley block, 4-1, a wheel seat pulling plate, 4-1-1, a pin hole, 4-2, an ear plate, 4-2-1, a penetrating hole, 4-3, an amplitude-variable movable pulley wheel shaft, 5, a traction winch, 6, a traction steel wire rope, 7, a traction fixed pulley, 8, a traction movable pulley, 9, a herringbone bracket, 9-1, a front bracket cross beam, 10, a crane boom, 11, a lifting guide wheel bracket, 12, an auxiliary crane, 13, a preset position, 14, a shackle, 15, a hook head, 16 and a hanging strip.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 1-5, the variable-amplitude movable pulley block retracting device convenient for transition comprises a variable-amplitude mechanism consisting of a variable-amplitude winch (1), a variable-amplitude steel wire rope (2), a variable-amplitude fixed pulley block (3) and a variable-amplitude movable pulley block (4), a traction mechanism is bolted on a wheel seat pull plate (4-1) in the amplitude-variable movable pulley block (4) (so that in the process of installing or dismantling the tower crane, the amplitude-variable mechanism and the traction mechanism are in a matching mode of driving one to be driven and winding one to be loosened, the winding and unwinding switching of the amplitude-variable movable pulley block (4) between a fixed position and a preset position is quickly realized, the dismounting and mounting link of the amplitude-variable movable pulley block is omitted, the link of repeatedly winding or furling an amplitude-variable steel wire rope on site before and after a transition is omitted, the installation or dismounting time of the tower crane needing the transition is greatly shortened, and the transition efficiency of the tower crane is obviously improved); the traction mechanism is formed by sequentially winding a traction steel wire rope (6) led out from a traction winch (5) through a traction fixed pulley (7) and a traction movable pulley (8), the leading-out end of the traction steel wire rope (6) is fixed on a lifting guide wheel bracket (11) in the middle of a crane boom (10) (when the tower crane is installed in place after a transition, the rope is taken up by the traction mechanism and the luffing mechanism is matched to loosen the rope, the luffing movable pulley block (4) which is detached from a front bracket cross beam (9-1) of the herringbone bracket (9) after the fixed pin shaft is detached is quickly and stably moved from a fixed position to a preset position by an external auxiliary crane (12), and then is adjusted to a required working position, before the tower crane is detached in the transition, the luffing mechanism is taken up by the luffing mechanism and the traction mechanism is matched to loosen the rope, and the luffing movable pulley block (4) is quickly and stably moved from the preset position to the fixed position by the external auxiliary crane (, then, inserting a fixed pin shaft into a pin hole of a wheel seat pulling plate (4-1) of the variable amplitude movable pulley block (4), and fastening the variable amplitude movable pulley block (4) on a front support cross beam (9-1) of the propeller strut (9); the wheel seat pulling plate (4-1) is of a long strip plate-shaped structure, one end of the wheel seat pulling plate is hung on the amplitude variable movable pulley wheel shaft (4-3), and the other end of the wheel seat pulling plate is provided with a pin hole (4-1-1) for inserting a fixed pin shaft (before the tower crane needs to be disassembled in a transition place, after the amplitude variable movable pulley block (4) returns to a fixed position, the fixed pin shaft is inserted into the pin hole (4-1-1) of the wheel seat pulling plate (4-1), the amplitude variable movable pulley block (4) can be fastened on a front support cross beam (9-1) of a propeller strut (9), so that the wheel seat pulling plate and the propeller strut (9) can be transported in the transition place together, an ear plate (4-2) is fixed at the side end of the wheel seat pulling plate (4-1), and a device penetrating hole (4-2-1); the traction movable pulley (8) is hung in the penetrating hole (4-2-1) of the ear plate (4-2) through a connecting piece (after the traction movable pulley (8) is connected with the amplitude-variable movable pulley block (4) through the connecting piece, the front and back series connection of the amplitude-variable mechanism and the traction mechanism is realized, so that the amplitude-variable mechanism and the traction mechanism can be matched by one driving rope and one driven rope and one rope-releasing rope, and the winding and unwinding switching of the amplitude-variable movable pulley block (4) between a fixed position and a preset position is quickly realized.
The connecting piece comprises a hook head (15), a hanging strip (16) and a shackle (14), wherein the hook head (15) is hinged to a support of a traction movable pulley (8), one end of the hanging strip (16) is buckled in a through hole (4-2-1) of an ear plate (4-2) through the shackle (14), and the other end of the hanging strip is hung on the hook head (15) (see figure 5. due to the fact that the shackle (14) is matched with the hanging strip (16) and the hook head (15) is matched with the hanging strip (16), the connecting piece has the advantages of being fast in connection and fast in disassembly and convenient to operate, the connecting piece can achieve fast connection or disassembly of the traction movable pulley (8) and the amplitude-variable movable pulley block (4), namely fast series connection or disassembly of the amplitude-variable mechanism and the traction mechanism.
In the invention, the traction winch (5) is arranged on a front support beam (9-1) of a propeller strut (9), and the traction fixed pulley (7) is arranged on a lifting guide wheel support (11).
The variable-amplitude winch (1) is arranged at the root part of a rear pull rod of a propeller strut (9), a variable-amplitude fixed pulley block (3) is arranged at the top part of the propeller strut (9), a variable-amplitude steel wire rope (2) is led out from the variable-amplitude winch (1), sequentially and repeatedly wound through the variable-amplitude fixed pulley block (3) and a variable-amplitude movable pulley block (4), and a leading-out end is fixed at the top part of the propeller strut (9) (when a tower crane is arranged in place after a transition, a traction mechanism is used for rope collection and the variable-amplitude mechanism are matched for rope loosening, and the variable-amplitude movable pulley block (4) which is disconnected with a front support beam (9-1) of the propeller strut (9) after a fixed pin shaft is dismantled is quickly and stably moved to a preset position from a fixed position by an external auxiliary crane (12) and then is adjusted to a required working position, before the tower crane is dismantled in need of the transition, the rope collection, and the amplitude-variable movable pulley block (4) is quickly and stably moved to a fixed position from a preset position by an external auxiliary crane, then a fixed pin shaft is inserted into a pin hole of a wheel seat pulling plate (4-1) of the amplitude-variable movable pulley block (4), and the amplitude-variable movable pulley block (4) is fastened on a front support cross beam (9-1) of the propeller strut (9).
The specific use cases of the invention are as follows:
when the variable-amplitude steel wire rope winding machine is used for the first time, the penetration and winding of the variable-amplitude steel wire rope (2) in the variable-amplitude mechanism are required to be completed (the variable-amplitude steel wire rope (2) only needs to penetrate and wind when the variable-amplitude steel wire rope winding machine is used for the first time, and does not need to be disassembled and penetrated and wound again in the subsequent transition process). The amplitude-variable steel wire rope (2) in the amplitude-variable mechanism is threaded and wound in the following way: the amplitude-variable steel wire rope (2) is led out in a rope outgoing mode from the lower part of the amplitude-variable winch (1), bypasses an amplitude-variable fixed pulley block (3) positioned at the top of the propeller strut (9), then bypasses an amplitude-variable movable pulley block (4) which is hinged and connected with a traction movable pulley (8) in the traction mechanism, passes through and winds between the amplitude-variable fixed pulley block (3) and the amplitude-variable movable pulley block (4) for a plurality of times back and forth, and finally the leading-out end of the amplitude-variable steel wire rope (2) is fixed at the top of the propeller strut (.
When the tower crane is transferred to a new construction site and the A-bracket (9) and the cargo boom (10) are installed in place, firstly, the traction steel wire rope (6) is threaded, and the traction steel wire rope (6) in the traction mechanism is threaded in the following way: the traction steel wire rope (6) is led out from the upper side of a winding drum of the traction winch (5), namely is led out upwards, bypasses a traction fixed pulley (7) on a lifting guide wheel bracket (11) of the crane boom (10), then bypasses a traction movable pulley (8) connected with an ear plate (4-2) of the amplitude-variable movable pulley block (4) through a hanging strip (16), and finally the leading-out end of the traction steel wire rope (6) is fixedly connected with the lifting guide wheel bracket (11). Then, a fixed pin shaft inserted in a pin hole (4-1-1) of a wheel seat pulling plate (4-1) is pulled out, the amplitude-variable movable pulley block (4) is disconnected with a front support cross beam (9-1) of the A-bracket (9), a traction mechanism is used for rope collection, the amplitude-variable mechanism is used for rope loosening in a matching mode, the amplitude-variable movable pulley block (4) is rapidly and stably moved to a preset position (13) from a fixed position by means of an external auxiliary crane (12), and then the required working position is adjusted.
When the tower crane needs to be transferred to a field for disassembly after the project is completed, the amplitude-variable winch (1) is started to take up the rope, the traction winch (5) is started to reversely rotate and loosen the rope for matching, and the amplitude-variable movable pulley block (4) is quickly and stably moved from the working position to the fixed position, namely the front support beam (9-1) of the propeller strut (9), by means of an external auxiliary crane (12). And a fixed pin shaft is inserted into a pin hole (4-1-1) of a wheel seat pulling plate (4-1) in the amplitude-variable movable pulley block (4), so that the amplitude-variable movable pulley block (4) is fastened on a front support cross beam (9-1) of the propeller strut (9). And then, the leading-out end of the traction steel wire rope (6) fixedly connected with the lifting guide wheel bracket (11) is untied, the traction winch (5) is started to release the rope, and the traction steel wire rope (6) is furled and wound on the traction winch (5). Thus, the luffing mechanism, the traction winch (5), the traction steel wire rope (6), the traction movable pulley (8) and the A-bracket (9) are transported in a field-transferring way, and the traction fixed pulley (7) and the crane boom (10) are transported in a field-transferring way.
Claims (4)
1. The utility model provides a change width of cloth movable pulley block winding and unwinding devices convenient to transition, includes the mechanism that changes the width of cloth that comprises change width of cloth hoist engine (1), change width of cloth wire rope (2), change width of cloth fixed pulley block (3) and change width of cloth movable pulley block (4), its characterized in that: a traction mechanism is bolted on a wheel seat pulling plate (4-1) in the variable amplitude movable pulley block (4); the traction mechanism is formed by sequentially winding a traction steel wire rope (6) led out from a traction winch (5) through a traction fixed pulley (7) and a traction movable pulley (8), and the leading-out end of the traction steel wire rope (6) is fixed on a lifting guide wheel bracket (11) in the middle of a crane boom (10); the wheel seat pulling plate (4-1) is of a long strip plate-shaped structure, one end of the wheel seat pulling plate is hung on the amplitude variable movable pulley wheel shaft (4-3), the other end of the wheel seat pulling plate is provided with a pin hole (4-1-1) for inserting and fixing a pin shaft, an ear plate (4-2) is fixed at the side end of the wheel seat pulling plate (4-1), and a penetrating hole (4-2-1) is formed in the ear plate (4-2); the traction movable pulley (8) is hung in the through hole (4-2-1) of the ear plate (4-2) through a connecting piece.
2. The variable-amplitude movable pulley block retracting device convenient for transition as claimed in claim 1, wherein: the connecting piece comprises a hook head (15), a hanging strip (16) and a shackle (14), the hook head (15) is hinged on a support of the traction movable pulley (8), one end of the hanging strip (16) is buckled in a penetrating hole (4-2-1) of the ear plate (4-2) through the shackle (14), and the other end of the hanging strip is hung on the hook head (15).
3. The variable-amplitude movable pulley block retracting device convenient for transition as claimed in claim 1, wherein: the traction winch (5) is arranged on a front support beam (9-1) of the A-bracket (9), and the traction fixed pulley (7) is arranged on a lifting guide wheel support (11).
4. The variable-amplitude movable pulley block retracting device convenient for transition as claimed in claim 1, wherein: the variable-amplitude winch (1) is arranged at the root part of a rear pull rod of the propeller strut (9), the variable-amplitude fixed pulley block (3) is arranged at the top part of the propeller strut (9), and the variable-amplitude steel wire rope (2) is led out from the variable-amplitude winch (1), sequentially and repeatedly wound through the variable-amplitude fixed pulley block (3) and the variable-amplitude movable pulley block (4), and the leading-out end is fixed at the top part of the propeller strut (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013056.6A CN110963425A (en) | 2020-01-07 | 2020-01-07 | Amplitude-variable movable pulley block retracting device convenient for transition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013056.6A CN110963425A (en) | 2020-01-07 | 2020-01-07 | Amplitude-variable movable pulley block retracting device convenient for transition |
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| Publication Number | Publication Date |
|---|---|
| CN110963425A true CN110963425A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010013056.6A Pending CN110963425A (en) | 2020-01-07 | 2020-01-07 | Amplitude-variable movable pulley block retracting device convenient for transition |
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| CN (1) | CN110963425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044450A (en) * | 2021-11-17 | 2022-02-15 | 郑州新大方重工科技有限公司 | Integral quick-release device and method for supporting arm system and crane |
-
2020
- 2020-01-07 CN CN202010013056.6A patent/CN110963425A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044450A (en) * | 2021-11-17 | 2022-02-15 | 郑州新大方重工科技有限公司 | Integral quick-release device and method for supporting arm system and crane |
| CN114044450B (en) * | 2021-11-17 | 2024-01-19 | 郑州新大方重工科技有限公司 | Integral quick-dismantling device and method for arm support system and crane |
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