CN112811329B - Crane auxiliary arm mounting method and crane - Google Patents
Crane auxiliary arm mounting method and crane Download PDFInfo
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- CN112811329B CN112811329B CN202110159111.7A CN202110159111A CN112811329B CN 112811329 B CN112811329 B CN 112811329B CN 202110159111 A CN202110159111 A CN 202110159111A CN 112811329 B CN112811329 B CN 112811329B
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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
- B66C23/64—Jibs
- B66C23/66—Outer or upper end constructions
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Abstract
The invention provides a crane auxiliary arm installation method and a crane, wherein the method comprises the following steps: the arm head of the main arm is rotationally connected with the arm tail of the auxiliary arm, the arm tail of the auxiliary arm is rotationally connected with the tail end of the auxiliary arm supporting rod, and the auxiliary arm is connected with the auxiliary arm supporting rod through a first pull plate assembly; the free end of the main lifting rope passes through a first guide wheel assembly on the auxiliary arm supporting rod and is connected with the auxiliary arm supporting rod, and the auxiliary arm supporting rod is lifted to drive the auxiliary arm supporting rod to rotate to a first preset angle position along a first rotation direction relative to the auxiliary arm; tightening the main lifting rope, and driving the auxiliary arm supporting rod to rotate to a second preset angle position along a first rotation direction relative to the auxiliary arm, so that the first pulling plate assembly is converted into a linear state from a free stretching state; the free end of the main lifting rope is disassembled from the auxiliary arm supporting rod and passes through the second guide wheel assembly on the arm head of the auxiliary arm. The invention is convenient for threading the main lifting rope, greatly simplifies the installation procedure of the auxiliary arm, reduces the installation operation difficulty and improves the installation efficiency.
Description
Technical Field
The invention relates to the technical field of cranes, in particular to a crane auxiliary arm installation method and a crane.
Background
The crane is widely applied in the technical field of engineering machinery, and the crane lifts a heavy object through the suspension arm and a steel wire rope wound on the arm head of the suspension arm. Based on different lifting demands, in order to improve the lifting height and working amplitude of the crane, the boom of the crane is usually configured as a main boom and an auxiliary boom. Due to limitations in loading size and transport weight, the crane often needs to be disassembled before and after the operation.
As shown in fig. 1, when the auxiliary arm of the crane is mounted, the auxiliary arm 2 is lifted to one side of the main arm 1 of the crane by the auxiliary crane 4, the arm head of the main arm 1 is hinged with the arm tail of the auxiliary arm 2, the tail end of the auxiliary arm support rod 3 is hinged with the arm tail of the auxiliary arm 2, and meanwhile, the first pull rope 5 and the second pull rope 6 are arranged on the auxiliary arm support rod 3; then, the auxiliary crane 4 is adopted to lift the auxiliary arm support rod 3 through the first stay rope 5, so that the auxiliary arm support rod 3 and the auxiliary arm 2 form a preset included angle; then, the second stay rope 6 is connected with a main lifting rope 7 of the crane, and the first stay rope 5 is put down and fixed on a lock lug of the auxiliary arm supporting rod 3; the main lifting rope 7 is tightened through winch, the auxiliary arm supporting rod 3 is pulled to one side of the main arm 1, and the auxiliary arm pulling plate on the side of the main arm is connected; then, loosening the main lifting rope 7 to balance the auxiliary arm pulling plate on the main arm side and the auxiliary arm pulling plate on the auxiliary arm side; then, the second stay rope 6 is disassembled from the main lifting rope 7, and the second stay rope 6 is fixed on the lock lug of the auxiliary arm 2; finally, the head end of the main lifting rope 7 sequentially passes through the first guide wheel assembly on the auxiliary arm supporting rod 3 and the second guide wheel assembly at the head end of the auxiliary arm 2 and is connected with the lifting hook of the crane. Thereby, the attachment of the auxiliary arm of the crane is completed.
However, since a plurality of pull ropes for assisting in lifting are required in the process of lifting the auxiliary boom support bar, a great deal of time is taken up for the detachment of the pull ropes. Meanwhile, after the auxiliary arm supporting rod is lifted in place, certain operation difficulty and construction safety risks exist in rope threading operation of the main lifting rope, and rope threading efficiency is low. In this way, in actual operation, the above-described mounting operation for the sub-arm is extremely troublesome, and the mounting efficiency is low.
Disclosure of Invention
The invention provides a crane auxiliary arm installation method and a crane, which are used for solving the problems of complex operation and low efficiency of the existing auxiliary arm installation mode.
The invention provides a crane auxiliary arm installation method, which comprises the following steps: s1, connecting the arm head of a main arm with the arm tail of an auxiliary arm in a rotating way, connecting the arm tail of the auxiliary arm with the tail end of an auxiliary arm supporting rod in a rotating way, connecting the auxiliary arm with the auxiliary arm supporting rod through a first pulling plate component, and dismantling a first locking structure on the first pulling plate component to enable the first pulling plate component to be in a free stretching state; s2, enabling the free end of the main lifting rope to pass through a first guide wheel assembly on the auxiliary arm supporting rod and be connected with the auxiliary arm supporting rod, lifting the auxiliary arm supporting rod, and driving the auxiliary arm supporting rod to rotate to a first preset angle position along a first rotation direction relative to the auxiliary arm; s3, tightening the main lifting rope, driving the auxiliary arm supporting rod to continuously rotate to a second preset angle position along the first rotation direction relative to the auxiliary arm, enabling the first pulling plate assembly to be converted into a straight line state from a free stretching state, and installing the first locking structure on the first pulling plate assembly, so that the first pulling plate assembly is kept in the straight line state; s4, detaching the free end of the main lifting rope from the auxiliary arm supporting rod and penetrating through a second guide wheel assembly on the arm head of the auxiliary arm.
According to the crane auxiliary arm installation method provided by the invention, in S2, the auxiliary arm supporting rod is lifted, and the crane auxiliary arm installation method comprises the following steps: connecting the head end of the auxiliary arm supporting rod with one end of a first pull rope, connecting the other end of the first pull rope with a lifting hook of an auxiliary crane, and controlling the lifting hook of the auxiliary crane to lift vertically upwards; correspondingly, in S3, before tightening the main hoisting rope, the method further includes releasing the hoisting operation on the auxiliary arm support rod: and separating the other end of the first stay rope from the lifting hook of the auxiliary lifting hook, and fixing the first stay rope on the locking lug of the auxiliary arm supporting rod.
According to the crane auxiliary arm installation method provided by the invention, the first preset angle alpha is 30-80 degrees, and the second preset angle beta is determined by the length of the first pulling plate component in a straight line state.
According to the method for installing the auxiliary arm of the crane provided by the invention, in S2, the free end of the main lifting rope passes through the first guide wheel assembly on the auxiliary arm supporting rod and is connected with the auxiliary arm supporting rod, and the method comprises the following steps: and a quick-release connector is arranged on the auxiliary arm supporting rod at a position close to the tail end of the auxiliary arm supporting rod, and the free end of the main lifting rope is connected with the quick-release connector after passing through the first guide wheel assembly on the auxiliary arm supporting rod.
According to the crane auxiliary arm installation method provided by the invention, the quick-release connector comprises any one of an eye bolt, a hook, a locking crane and a clamp.
According to the method for installing the auxiliary arm of the crane provided by the invention, in the step S3, before the main lifting rope is tightened, the method further comprises the following steps: and releasing the lifting operation of the auxiliary arm support rod.
According to the crane auxiliary arm installation method provided by the invention, between S3 and S4, the crane auxiliary arm installation method further comprises the following steps: the main arm and the auxiliary arm support rod are connected through a second pulling plate assembly, and a second locking structure on the second pulling plate assembly is removed, so that the second pulling plate assembly is in a free stretching state; loosening the main lifting rope to enable the auxiliary arm to rotate in a second rotation direction relative to the main arm under the action of self gravity until the second pulling plate assembly is converted into a straight line state from a free stretching state, and installing the second locking structure on the second pulling plate assembly to enable the second pulling plate assembly to keep the straight line state; wherein the second direction of rotation is opposite to the direction of rotation of the first direction of rotation.
According to the crane auxiliary arm installation method provided by the invention, the first pulling plate component and the second pulling plate component have the same structure and comprise a plurality of pulling plates which are sequentially connected; the first locking structure and the second locking structure are identical in structure and comprise a locking plate, a first locking pin and a second locking pin; one end of the lock plate is connected with the first lock pin, and the other end of the lock plate is connected with the second lock pin; and under the condition that the first pull plate assembly or the second pull plate assembly is in a straight line state, the first lock pin and the second lock pin are respectively inserted and installed on two adjacent pull plates.
According to the crane auxiliary arm installation method provided by the invention, before S1, the method further comprises the following steps: assembling the main arm, and placing the assembled main arm on the ground; the auxiliary boom is lifted by adopting an auxiliary crane, the auxiliary boom is placed on one side of the main boom, so that the boom head of the main boom and the boom tail of the auxiliary boom are oppositely arranged, and the main boom and the auxiliary boom are distributed on the same straight line.
According to the method for installing the auxiliary arm of the crane, in the S1, the arm head of the main arm is rotationally connected with the arm tail of the auxiliary arm through the pin shaft, and the arm tail of the auxiliary arm is rotationally connected with the tail end of the auxiliary arm supporting rod through the pin shaft.
The invention also provides a crane comprising: the auxiliary arm is arranged on the main arm by adopting the crane auxiliary arm installation method.
According to the crane auxiliary arm installation method and the crane, the free end of the main lifting rope passes through the first guide wheel assembly on the auxiliary arm supporting rod and is connected with the auxiliary arm supporting rod, so that the auxiliary arm supporting rod is conveniently driven to rotate relative to the auxiliary arm through the main lifting rope until the auxiliary arm, the auxiliary arm supporting rod and the first pulling plate assembly in a linear state form a stable connection structure, and the free end of the main lifting rope can directly pass through the second guide wheel assembly on the arm head of the auxiliary arm after being disassembled from the auxiliary arm supporting rod and is connected with the lifting hook of the crane, so that the installation of the auxiliary arm is completed.
Compared with the existing auxiliary arm installation mode, the method disclosed by the invention omits the connection and disassembly operations of the main lifting rope and the auxiliary pull rope in the prior art, is also convenient for carrying out the rope threading operation of the main lifting rope, greatly simplifies the installation procedure of the auxiliary arm, reduces the installation operation difficulty and effectively improves the installation efficiency of the auxiliary arm.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art installation of a crane jib;
FIG. 2 is a schematic flow chart of a crane auxiliary arm installation method provided by the invention;
fig. 3 is a schematic structural diagram of lifting the auxiliary arm support rod in S2 to drive the auxiliary arm support rod to form a first preset angle α relative to the auxiliary arm;
FIG. 4 is a schematic view of the structure of the main lift cord in S2 according to the present invention, wherein the free end of the main lift cord is connected to the auxiliary arm support bar;
FIG. 5 is a schematic diagram of the structure of the main hoisting rope in S4 according to the present invention;
reference numerals:
1: a main arm; 2: a secondary arm; 3: a sub-arm support bar;
4: auxiliary hanging; 5: a first pull rope; 6: a second pull rope;
7: a main lift cord; 8: a first pull plate assembly; 9: a second pull plate assembly;
10: a first idler assembly; 11: a second idler assembly; 12: quick release type joint.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The crane jib mounting method and the crane according to the invention are described below with reference to fig. 2 to 5.
As shown in fig. 2, the embodiment provides a crane auxiliary arm installation method, which specifically includes the following steps:
s1, the arm head of a main arm 1 is rotationally connected with the arm tail of an auxiliary arm 2, the arm tail of the auxiliary arm 2 is rotationally connected with an auxiliary arm supporting rod 3, the auxiliary arm 2 is connected with the auxiliary arm supporting rod 3 through a first pulling plate component 8, and a first locking structure on the first pulling plate component 8 is removed, so that the first pulling plate component 8 is in a free stretching state.
Before the main arm 1 and the auxiliary arm 2 are hinged, the main arm 1 is assembled according to the arrangement structure shown in fig. 3, the assembled main arm 1 is placed on the ground, the auxiliary arm 2 is horizontally hoisted on one side of the main arm 1 by adopting an auxiliary crane, the arm head of the main arm 1 and the arm tail of the auxiliary arm 2 are oppositely arranged, the main arm 1 and the auxiliary arm 2 are distributed on the same straight line, and the rotation connection between the arm head of the main arm 1 and the arm tail of the auxiliary arm 2 can be realized through a pin shaft. In this embodiment, a hinge bracket may be installed at the tail of the auxiliary arm 2, and the tail end of the auxiliary arm support rod 3 is hinged to the hinge bracket through a pin.
Meanwhile, the first pull plate assembly 8 in this embodiment may include a plurality of pull plates connected in sequence, and each pull plate on the first pull plate assembly 8 may be in two states, i.e., a freely stretched state and a straight state. The first locking structure shown in the embodiment comprises a locking plate, a first locking pin and a second locking pin; one end of the locking plate is connected with the first locking pin, and the other end of the locking plate is connected with the second locking pin; in the case that the first pulling plate assembly 8 is in a straight state, the first locking pin and the second locking pin are respectively inserted into two adjacent pulling plates. Therefore, when each pulling plate on the first pulling plate assembly 8 is in a straight line state, since any two adjacent pulling plates pass through the first locking structure, the first pulling plate assembly 8 has stronger stability and can provide stronger supporting force along the length direction of the pulling plate. Here, it may be specifically set that the pull plate located at the head end on the first pull plate assembly 8 is movably connected with the tail end of the auxiliary arm support rod 3, and the pull plate located at the tail end on the first pull plate assembly 8 is movably connected with the arm head of the auxiliary arm 2.
S2, enabling the free end of the main lifting rope 7 to penetrate through a first guide wheel assembly 10 on the auxiliary arm supporting rod 3 and be connected with the auxiliary arm supporting rod 3, lifting the auxiliary arm supporting rod 3, and driving the auxiliary arm supporting rod 3 to rotate to a first preset angle position along a first rotation direction relative to the auxiliary arm 2.
As shown in fig. 3, when the auxiliary arm support rod 3 is lifted, the head end of the auxiliary arm support rod 3 may be connected to one end of the first pull rope 5, the other end of the first pull rope 5 may be connected to the hook of the auxiliary crane 4, and the hook of the auxiliary crane 4 may be controlled to vertically lift upwards so as to drive the auxiliary arm support rod 3 to rotate to a first preset angle α in a first rotation direction relative to the auxiliary arm 2.
In order to facilitate lifting the auxiliary arm support rod 3 and threading the main lifting rope 7 through the first guide wheel assembly 10, the first preset angle α may be specifically set to be 30 ° to 80 °, for example: the magnitude of the first preset angle α is specifically 30 °, 45 °, 50 °, 60 °, 80 °, etc., and is not specifically limited herein.
As shown in fig. 4, the first guide wheel assembly 10 of the present embodiment may be embodied as a guide pulley mounted at the middle of the sub-arm support bar 3. Also, in order to facilitate the rapid mounting and dismounting of the free end of the main lift cord 7 on the auxiliary arm support bar 3, a quick-release connector 12 for conveniently connecting the free end of the main lift cord 7 is mounted on the auxiliary arm support bar 3 near the tail end thereof in the embodiment, and the quick-release connector 12 is detachably connected with the auxiliary arm support bar 3, and the other end of the main lift cord 7 is connected with the main hoist. The free end of the main hoisting rope 7 is connected with a quick-release joint 12 after passing through a first guide wheel assembly 10 on the auxiliary arm support rod 3.
The quick release connector 12 may be any one of an eye bolt, a hook, a lock hanger, and a clamp, and is not particularly limited herein.
S3, tightening the main lifting rope 7, driving the auxiliary arm supporting rod 3 to continuously rotate to a second preset angle position along a first rotation direction relative to the auxiliary arm 2, enabling the first pulling plate assembly 8 to be converted into a linear state from a free stretching state, and installing a first locking structure on the first pulling plate assembly 8, enabling the first pulling plate assembly 8 to keep the linear state, so that stable support is formed on the auxiliary arm supporting rod 3.
Specifically, in order to ensure that the auxiliary arm support bar 3 can be driven to rotate relative to the auxiliary arm 2 by the main lift cord 7, the present embodiment further includes, before tightening the main lift cord 7: the lifting operation of the auxiliary arm support bar 3 is released. When the lifting operation of the auxiliary arm support rod 3 is released, the other end of the first pull rope 5 can be separated from the lifting hook of the auxiliary crane 4, and the first pull rope 5 can be fixed on the locking lug of the auxiliary arm support rod 3.
Then, when the main hoisting rope 7 is tightened, the main hoist is specifically started, and the main hoist performs winding operation to tighten the main hoisting rope 7, so as to drive the auxiliary arm support rod 3 to continue to rotate to a position of a second preset angle beta along the first rotation direction relative to the auxiliary arm 2.
The second preset angle β is greater than the first preset angle α, and the magnitude of the second preset angle β is determined by the length of the first pulling plate assembly 8 in the straight line state, and the second preset angle β is usually an obtuse angle. When the first pulling plate assembly 8 is in a straight line state, the auxiliary arm supporting rod 3, the auxiliary arm 2 and the first pulling plate assembly 8 can form a stable triangle structure.
S4, the free end of the main lifting rope 7 is detached from the auxiliary arm supporting rod 3 and passes through the second guide wheel assembly 11 on the arm head of the auxiliary arm 2.
As shown in fig. 5, after the free end of the main hoisting rope 7 is detached from the auxiliary arm support bar 3, the main hoist may be started again to unwind the main hoisting rope 7, and an operator may pull the main hoisting rope 7 under the guidance of the first guide wheel assembly 10, pass the main hoisting rope 7 through the second guide wheel assembly 11 on the arm head of the auxiliary arm 2, and connect with the hook of the crane. The second guide wheel assembly 11 may be a pulley block formed by a plurality of fixed pulleys.
Based on the steps shown above, the free end of the main lifting rope 7 passes through the first guide wheel assembly 10 on the auxiliary arm support rod 3 and is connected with the auxiliary arm support rod 3, so that the auxiliary arm support rod 3 is driven to rotate relative to the auxiliary arm 2 through the main lifting rope 7 until the auxiliary arm 2, the auxiliary arm support rod 3 and the first pulling plate assembly 8 in a straight state form a stable connecting structure, and therefore after the free end of the main lifting rope 7 is detached from the auxiliary arm support rod 3, the free end can directly pass through the second guide wheel assembly 11 on the arm head of the auxiliary arm 2 and is connected with the lifting hook of the crane, so that the installation of the auxiliary arm 2 is completed.
Compared with the existing installation mode of the auxiliary arm, the method of the embodiment omits the connection and disassembly operations of the main lifting rope 7 and the auxiliary pull rope in the prior art, is convenient for the rope threading operation of the main lifting rope 7, greatly simplifies the installation procedure of the auxiliary arm 2, reduces the installation operation difficulty, and effectively improves the installation efficiency of the auxiliary arm 2.
It should be noted here that the main hoisting ropes 7, the auxiliary ropes and the first rope 5 shown in the present embodiment may be wire ropes as known in the art.
Further, in order to further ensure the stability of the mounting structure of the auxiliary arm support bar 3, the present embodiment may further provide, between step S3 and step S4: the main arm 1 is connected with the auxiliary arm supporting rod 3 through a second pulling plate assembly 9, and a second locking structure on the second pulling plate assembly 9 is removed, so that the second pulling plate assembly 9 is in a free stretching state; by releasing the main lift cord 7, the auxiliary arm 2 is rotated in a second rotational direction relative to the main arm 1 under the action of its own weight until the second pulling plate assembly 9 is converted from a free extended state to a straight state, and the second locking structure is mounted on the second pulling plate assembly 9, so that the second pulling plate assembly 9 maintains the straight state to stably support the auxiliary arm support bar 3. Therefore, the two sides of the auxiliary arm supporting rod 3 are respectively supported by the first pulling plate assembly 8 and the second pulling plate assembly 9, and the auxiliary arm supporting rod 3 can be effectively prevented from rotating relative to the main arm 1 and the auxiliary arm 2.
The second rotation direction shown in this embodiment is opposite to the rotation direction of the first rotation direction, that is, when the first rotation direction is clockwise, the second rotation direction is counterclockwise, and correspondingly, when the second rotation direction is clockwise, the first rotation direction is counterclockwise, which is not specifically limited herein.
Meanwhile, the first pull plate assembly 8 and the second pull plate assembly 9 in this embodiment have the same structure, and the first locking structure and the second locking structure have the same structure, which is not described in detail herein.
Preferably, the present embodiment further provides a crane, including: the main arm 1 and the sub arm 2 are attached to the main arm 1 by the crane sub arm attachment method described above.
The crane shown in this embodiment is preferably a crawler crane.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A crane jib mounting method, comprising:
s1, connecting the arm head of a main arm with the arm tail of an auxiliary arm in a rotating way, connecting the arm tail of the auxiliary arm with the tail end of an auxiliary arm supporting rod in a rotating way, connecting the auxiliary arm with the auxiliary arm supporting rod through a first pulling plate component, and dismantling a first locking structure on the first pulling plate component to enable the first pulling plate component to be in a free stretching state;
s2, enabling the free end of the main lifting rope to pass through a first guide wheel assembly on the auxiliary arm supporting rod and be connected with the auxiliary arm supporting rod, lifting the auxiliary arm supporting rod, and driving the auxiliary arm supporting rod to rotate to a first preset angle position along a first rotation direction relative to the auxiliary arm;
s3, tightening the main lifting rope, driving the auxiliary arm supporting rod to continuously rotate to a second preset angle position along the first rotation direction relative to the auxiliary arm, enabling the first pulling plate assembly to be converted into a straight line state from a free stretching state, and installing the first locking structure on the first pulling plate assembly, so that the first pulling plate assembly is kept in the straight line state;
s4, detaching the free end of the main lifting rope from the auxiliary arm supporting rod and penetrating through a second guide wheel assembly on the arm head of the auxiliary arm.
2. The method for installing a crane jib according to claim 1, wherein,
s2, the hoisting the auxiliary arm support rod comprises the following steps: connecting the head end of the auxiliary arm supporting rod with one end of a first pull rope, connecting the other end of the first pull rope with a lifting hook of an auxiliary crane, and controlling the lifting hook of the auxiliary crane to lift vertically upwards;
correspondingly, in S3, before tightening the main hoisting rope, the method further includes releasing the hoisting operation on the auxiliary arm support rod: and separating the other end of the first stay rope from the lifting hook of the auxiliary lifting hook, and fixing the first stay rope on the locking lug of the auxiliary arm supporting rod.
3. The method for installing a crane jib according to claim 1, wherein,
the first preset angle is 30-80 degrees, and the second preset angle is determined by the length of the first pulling plate component in a straight line state.
4. The method for installing a crane jib according to claim 1, wherein,
s2, the free end of the main lifting rope passes through the first guide wheel assembly on the auxiliary arm supporting rod and is connected with the auxiliary arm supporting rod, and the method comprises the following steps:
and a quick-release connector is arranged on the auxiliary arm supporting rod at a position close to the tail end of the auxiliary arm supporting rod, and the free end of the main lifting rope is connected with the quick-release connector after passing through the first guide wheel assembly on the auxiliary arm supporting rod.
5. The method for installing a crane jib according to claim 4 wherein,
the quick-release connector comprises any one of an eye bolt, a hook, a lock hanger and a clamp.
6. The crane jib mounting method according to any one of claims 1 to 5, further comprising, between S3 and S4:
the main arm and the auxiliary arm support rod are connected through a second pulling plate assembly, and a second locking structure on the second pulling plate assembly is removed, so that the second pulling plate assembly is in a free stretching state;
loosening the main lifting rope to enable the auxiliary arm to rotate in a second rotation direction relative to the main arm under the action of self gravity until the second pulling plate assembly is converted into a straight line state from a free stretching state, and installing the second locking structure on the second pulling plate assembly to enable the second pulling plate assembly to keep the straight line state;
wherein the second direction of rotation is opposite to the direction of rotation of the first direction of rotation.
7. The method for installing a crane jib according to claim 6, wherein,
the first pull plate assembly and the second pull plate assembly have the same structure and each comprise a plurality of pull plates which are connected in sequence;
the first locking structure and the second locking structure are identical in structure and comprise a locking plate, a first locking pin and a second locking pin; one end of the lock plate is connected with the first lock pin, and the other end of the lock plate is connected with the second lock pin; and under the condition that the first pull plate assembly or the second pull plate assembly is in a straight line state, the first lock pin and the second lock pin are respectively inserted and installed on two adjacent pull plates.
8. The crane jib mounting method according to any one of claims 1 to 5, further comprising, prior to S1:
assembling the main arm, and placing the assembled main arm on the ground;
the auxiliary boom is lifted by adopting an auxiliary crane, the auxiliary boom is placed on one side of the main boom, so that the boom head of the main boom and the boom tail of the auxiliary boom are oppositely arranged, and the main boom and the auxiliary boom are distributed on the same straight line.
9. The crane jib mounting method according to any one of claims 1 to 5, wherein in S1, the head of the main jib is rotatably connected to the tail of the jib via a pin, and the tail of the jib is rotatably connected to the tail of the jib support bar via a pin.
10. A crane comprising a main arm and a sub-arm, wherein the sub-arm is mounted on the main arm using the crane sub-arm mounting method as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110159111.7A CN112811329B (en) | 2021-02-04 | 2021-02-04 | Crane auxiliary arm mounting method and crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110159111.7A CN112811329B (en) | 2021-02-04 | 2021-02-04 | Crane auxiliary arm mounting method and crane |
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| CN112811329A CN112811329A (en) | 2021-05-18 |
| CN112811329B true CN112811329B (en) | 2023-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102358580B (en) * | 2011-08-12 | 2013-03-27 | 中联重科股份有限公司 | Folding boom structure and method for unfolding and folding the same |
| CN102381641A (en) * | 2011-11-04 | 2012-03-21 | 三一汽车起重机械有限公司 | Crane auxiliary arm mounting equipment and crane auxiliary arm mounting method |
| CN202322105U (en) * | 2011-11-04 | 2012-07-11 | 三一汽车起重机械有限公司 | Crane and device for installing auxiliary boom of crane |
| CN102897677B (en) * | 2012-09-24 | 2014-11-19 | 三一重工股份有限公司 | Crane fly jib self-assembly and disassembly device and method, as well as crane |
| JP6004537B2 (en) * | 2013-03-18 | 2016-10-12 | コベルコ建機株式会社 | jib |
| CN103601082B (en) * | 2013-11-22 | 2015-06-17 | 中联重科股份有限公司 | Crane and arm lifting method thereof |
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