Single counterweight type automatic levelling spreader and using method thereof

Abstract

The invention relates to a single counterweight type automatic levelling spreader and a using method thereof, belonging to the technique of loading-unloading winching device. The single counterweight type automatic levelling spreader comprises a bearing spreader, an automatic levelling device, an initial bottom surface distance measurer, a target bottom surface distance measurer and a computer, wherein the automatic levelling device is mounted on the bearing spreader and is provided with counterweight blocks; the initial bottom surface distance measurer and the target bottom surface distance measurer are respectively located below an initial bearing bracket and a target bearing bracket; the computer communicates with both the bottom distance measurers, calculates the leveling inclination angle of the loading butt joint surface according to information measured by the initial bottom surface distance measurer and the target bottom surface distance measurer and based on the input structural size of the loading butt joint surface, calculates control signals, transmits the control signals to the automatic levelling device, controls the position of the counterweight block in the automatic levelling device and keeps the initial bearing bracket and horizontal target bearing bracket of the loading butt joint in the horizontal state so as to realize precise and easily damaged hoisting. The invention has the advantages of high precision, fast speed, safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of loading and unloading hoisting devices, and relates to a single counterweight type automatic level adjustment sling and a use method. Background technique [0002] With the development of processing technology, in industrial production and national defense construction, the design and processing accuracy of products are getting higher and higher, and with it comes the requirement to improve the assembly accuracy of components. Especially for the assembly of some large products, it is often necessary to mechanically hoist its components. Due to the design and manufacturing process of the product, the center of gravity of many product components does not coincide with their geometric center. During the hoisting process, the product components will be inclined, resulting in a certain angle between the butt surfaces. In this case, if the butt surface is directly tightened, invisible structural deformation wi...

AI Technical Summary

Problems solved by technology

For example, during the hoisting process of large turbine units, it is also necessary to ensure the stability of the unit and the accuracy of the docking surface. The collision will reduce the performance of the system or even scrap it in advance; the deformation of the dome docking surface will cause the sealing performance to decline

In addition, this type of product has fewer available lifting joints, generally larger in size and weight, and difficult to adjust. The traditional adjustment method takes a lot of time, and the accuracy cannot be guaranteed. The entire lifting process takes a long time and the production efficiency is low.

[0004] There are many existing level adjustment methods, but most of them require a lot of manual participation

For example, using a sling with adjustable length, according to the measured angle, the length of the sling is manually adjusted to achieve the level of the bottom surface of the heavy object. After several hours or even a day, it is difficult to guarantee the required accuracy; and it requires on-site participation of personnel, which poses a great safety hazard

Another example is the double-machine lifting method. Two cranes cooperate with traction to adjust the posture of the heavy object, so as to realize parallel docking surfaces of product components; this method can achieve a certain adjustment effect, but because two cranes are required to participate, In addition, the crane is operated by different personnel, and there are certain difficulties in cooperation. The requirements for the on-site command personnel are relatively high, and the hoisting process is still time-consuming.

In addition, the existing methods are mostly suitable for the case where the butt surface is a uniform plane, and it is more difficult to guarantee the accuracy in other cases

[0005] To sum up, there are many discomforts in the existing horizontal hoisting adjustment methods, and there is an urgent need for a fully automatic horizontal adjustment hoisting system that can achieve precise hoisting in the industrial production process.

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