Method and device for identifying working condition of five-knuckle arm crane with wire ropes

Abstract

The invention discloses a method and a device for identifying the working condition of a five-knuckle arm crane with wire ropes. The working condition is automatically identified by additionally arranging a length measuring device for measuring extension elongation of the second knuckle arm and a performance curve; extension elongation information of the second knuckle arm is measured by using the length measuring device and the information is transferred to a host machine of a moment limiter through an aboard communication network of the crane; the host machine of the moment limiter calculates the extension rate of the second knuckle arm according to the length information to further perform intelligent matching according to a program compiled in advance and the performance curve stored in the host machine of the moment limiter to pair the proper performance curve so as to realize intelligent hoisting. The method and device disclosed by the invention overcome the defect that the conventional sequential stretching mode must be strictly operated according to the sequence of an operation procedure, a hoisting arm can stretch arbitrarily, the special demand of the user on different working conditions and hoisting speed is satisfied, and the lifting performance is enhanced.

Description

technical field [0001] The invention relates to a method for identifying a working condition of a crane, in particular to a method and a device for identifying a working condition of a five-section jib rope row crane, belonging to the technical field of working condition identification of a five-section jib rope row crane. Background technique [0002] At present, the boom of the five-arm truck crane generally adopts the method of double cylinders and rope rows for expansion and contraction. The two-stage telescopic cylinder drives the three-, four-, and five-section arms to expand and contract synchronously. When the second-section boom is fully extended, the two-stage telescopic cylinder drives the three-, four-, and five-section arms by selecting the two-stage telescopic cylinder and corresponding operations. The jib flexes synchronously. Such as figure 1 with figure 2 As shown, the specific method of sequential expansion and contraction is: the first-stage telescopic...

AI Technical Summary

Problems solved by technology

[0003] However, because the performance curve remains unchanged, it is required that when the boom is extended, the third, fourth, and fifth booms must be fully extended when the second boom is fully extended, and the reverse order is when the boom is retracted. Otherwise, the hoisting task cannot be completed normally; that is, the operator must strictly follow the operation sequence, including the sequence of extending the boom and retracting the boom must be carried out in strict accordance with the operation process, and arbitrary expansion and contraction cannot be achieved.

In the actual hoisting process, for some special working conditions, the customer needs to quickly expand and contract to the corresponding position to meet the needs of these working conditions, and sequential expansion and contraction cannot be realized

In addition, the operator may not follow the operation steps to perform illegal operations by forcing or other means, adopt the wrong expansion and contraction sequence, and call the wrong performance curve, which will bring challenges to the safety of hoisting, and there are potential safety hazards and poor security.

[0004] In general, the existing sequential scaling method is easy to operate and mature in technology, but it is only equipped with a set of performance tables. When performing performance curve adaptation, there is only one choice, which cannot fully meet the needs of various working conditions, and in actual operation During the process, the operator must strictly follow the operation sequence. Once there is an illegal operation, it is easy to cause an alarm or a mismatch between the performance curve and the actual situation, which will affect the lifting safety.

Moreover, it is not easy to realize real-time monitoring of user operation status

[0005] In order to solve such problems, domestic manufacturers have developed arbitrary scaling methods. Although the existing arbitrary scaling methods can meet the needs of rapid scaling, there is also the problem of incomplete matching of performance curves, which is prone to iterative errors and ultimately affects lifting. performance

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