CN-116692702-B - Foldable super-lifting device, crane and tensioning control system and method

CN116692702BCN 116692702 BCN116692702 BCN 116692702BCN-116692702-B

Abstract

The invention discloses a foldable super-lifting device, which comprises a super-lifting arm support, super-lifting supports and a super-lifting winch, wherein the super-lifting support is arranged at two ends of the super-lifting arm support, the super-lifting arm support comprises a fixed arm support connected with the super-lifting support and a folding arm support connected with the super-lifting winch, the folding arm support is connected with the fixed arm support through a rotating shaft, and the length of the super-lifting arm support is adjusted through unfolding and folding. The foldable super-lift arm can guide the foldable super-lift to tension before the lifting operation, and adopts different two-stage unfolding schemes by combining the arm length of the main arm and the combination, so that the relation between the super-lift length and the unfolding angle and the arm support length is optimized, the stress state of the arm support can be improved to the greatest extent, the arm support strength and rigidity are improved, and the product performance is improved.

Inventors

GU SISHENG
FU YUQIN
QIN XIAOHU
CHENG DAZHONG

Assignees

徐州重型机械有限公司

Dates

Publication Date: 20260505
Application Date: 20230705

Claims (1)

1. A multi-angle tensioning control method is characterized by adopting a multi-angle tensioning control system, wherein the multi-angle tensioning control system is realized based on a crane and comprises a force limiter system, a display system, an arm position detection device, a super-lifting first angle sensor, a super-lifting second angle sensor, a super-lifting winch encoder and a super-lifting tension sensor, a foldable super-lifting device is arranged on a telescopic main arm of the crane, the foldable super-lifting device comprises a super-lifting arm support (1), super-lifting supports and super-lifting winches (2) arranged at two ends of the super-lifting arm support, the super-lifting arm support (1) comprises a fixed arm support (101) connected with the super-lifting support and a folding arm support (102) connected with the super-lifting winches (2), the folding arm support (102) is connected with the fixed arm support (101) through a rotating shaft, a first connecting point (103) is arranged on one side of a splicing end of the fixed arm support (101) and the folding arm support (102) through the fixed rotating shaft, and a second connecting point (104) and a third connecting point (105) are respectively arranged on the other side of the fixed arm support (101) and the folding arm support (102) when the fixed arm support and the third connecting point (102) are not connected, the folding arm support is characterized in that the position of a second connecting point (104) is fixed through a bolt assembly, after the fixed arm support (101) and the folding arm support (102) are completely folded, the position of a third connecting point (105) is fixed through the bolt assembly, the bolt assembly is an automatic pulling and inserting device, the fixed arm support (101) and the folding arm support (102) are connected through a crank rocker assembly (106) and driven through a driving element (107), the crank rocker assembly (106) is controlled to swing, the folding arm support (102) is driven to carry out folding/unfolding actions, and the driving element (107) is a hydraulic telescopic oil cylinder; The multi-angle tensioning control method comprises the following steps: s1, installing a foldable super-lifting device, and checking that a crane has a lifting condition; s2, unlocking an oil cylinder and a winch of the super-lifting device to enable the main arm to have an arm extending condition; S3, the main arm extends to a specified arm length combination and changes into a corresponding main arm angle; S4, according to the arm length combination of the main arm, the super-lifting device performs primary expansion to enable a primary expansion angle alpha to reach a specified angle, wherein the primary expansion angle is an included angle between the fixed arm support and the main arm; S5, performing secondary expansion by the super-lifting device according to the arm length combination of the main arm, so that a secondary expansion angle beta reaches a specified angle, wherein the secondary expansion angle is an included angle between the fixed arm support and the folding arm support; s6, confirming again whether the two-stage expansion angle of the super-lift device is matched with the corresponding arm length combination of the main arm, if not, readjusting; S7, after confirming the two-stage expansion angle of the super-lifting device, performing super-lifting tensioning, and when the winch reaches a specified rotation angle, locking the winch; S8, detecting whether the super-lift tension meets design requirements or not through a super-lift tension sensor, if not, unlocking the super-lift winch, adjusting the number of winch teeth, and re-tensioning and locking; s9, hoisting after the tension meets the design value.

Description

Foldable super-lifting device, crane and tensioning control system and method Technical Field The invention relates to the technical field of engineering machinery, in particular to a foldable super-lifting device, a crane, a tensioning control system and a tensioning control method. Background With the continuous improvement of crane technology and the higher requirements of customers on product performance, the crane is slightly limited by single-bridge load, the whole weight of the crane is not increased, and the boom structure design is more prone to lightweight design. This results in an increase in arm length lengthening performance, which requires an increase in arm section and plate thickness. If the lifting device with fixed length is designed only in the past, the lifting performance is improved only to a limited extent, the product is difficult to meet the requirements of clients, the product competitiveness is also reduced, and the sales of the enterprise product is directly influenced. However, the super-lifting device used in the market still adopts a fixed-length structural form, and the structural form can not enable the crane boom to fully exert the performance of the cantilever crane structure of a product, can not better improve the strength and the rigidity of the cantilever crane, and can not meet the requirements of customers on high performance. In addition, since the superlift device is mounted on the basic arm of the crane arm, the length of the superlift device cannot be larger than that of the basic arm due to the limitation of the length of the basic arm, and the superlift device with fixed length is limited by the mounting size. In the prior art, the super-lifting device is mainly in two forms, the first is assembled, the length of the super-lifting device is changed by adding an extension joint structure or the like between the super-lifting arm support and the super-lifting winch, the second is telescopic structure which is similar to a telescopic system of a lifting arm, the telescopic system adopts the telescopic change of an oil cylinder or a rope row, and the telescopic system is fully retracted or partially retracted in the transition process, and is outwards telescopic to the arm length of the use during the use. The assembled super-lifting device realizes the length change of the super-lifting device by adding an assembly part in the super-lifting device when in use, but does not meet the space requirement of a transfer complete machine after the length change, the installed parts are required to be removed again to enable the super-lifting device to be prone to the crane arm, and the added parts are required to be transported independently. The length of the telescopic super-lifting device can be adjusted during use, but the telescopic super-lifting device adopts a telescopic cylinder, one end of the telescopic cylinder is connected with one end of the upper part of the super-lifting device, and the lower part of the super-lifting device is connected with one end of the upper part of the super-lifting device, because the length of the super-lifting device is more than 10m, the telescopic cylinder is longer, the weight of the cylinder is large, the cost is high, the cost performance is low, and the development and popularization of the super-lifting device are restricted by the characteristics. Meanwhile, the super-lift in the prior art has only one unfolding angle, the super-lift can only affect the arm support through single angle adjustment during tensioning, the unfolding angle is single, the unfolding angle cannot be adjusted in multiple stages under the condition of fixed super-lift length, the unfolding angle cannot be adjusted according to the arm length of the crane arm during use, the two can not be optimally matched, and the performance of the arm support can not be fully improved due to the super-lift tensioning under the single angle mode. Disclosure of Invention The first object of the present invention is to disclose a foldable superlift device, which can realize three different working modes by multi-stage adjustment modes of folding/unfolding; The second purpose is to disclose a crane comprising the foldable super-lifting device, wherein the super-lifting device can be used for multi-stage unfolding by combining the arm length and the combination of the main arm through folding/unfolding of the super-lifting device, and different unfolding working states can be switched; A third object is to disclose a multi-angle tension control system comprising a foldable superlift device as described above; a fourth object is to disclose a multi-angle tension control method comprising a foldable super lift device as described above. According to the technical scheme, the foldable super-lifting device comprises a super-lifting arm support, super-lifting supports and a super-lifting winch, wherein the super-lifting support is arranged at two ends of the super-lifting