Crane Wind Power Jib Overturning Transport Method

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Solution Overview

Problem

Current methods for ultra-large tonnage cranes in the wind power installation and maintenance market are inefficient due to the time-consuming process of removing and reassembling the wind power jib, which requires additional vehicles and labor, increasing transition costs.

Innovation Solution

An operating method for the wind power jib of a crane involves rotatably connecting the main boom and wind power jib, using a traction means to overturn the jib to a preset position, and then releasing it to self-gravity and a cushioning member for controlled positioning, allowing for transitional transport without auxiliary vehicles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the wind power jib is removed and reassembled before transition, then the crane can be transported to the next site, but the process takes a long time and consumes extra labor and vehicles

Engineering Contradiction:

Improvetransition speedVSAvoidinstallation/removal time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The wind power jib is pre-positioned on the main boom in an overturned state before the crane arrives at the next site. This preliminary preparation eliminates the need for time-consuming installation and removal operations during transition, allowing the crane to move directly to the next location with the jib already in position.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The crane's own structure, specifically the main boom and its overturning mechanism, is used to support and position the wind power jib during transport. The jib utilizes the main boom's structural capacity and the overturning mechanism to maintain its position without requiring external auxiliary vehicles or equipment.

Inventive Principle:

Principle #25Self-service

2Productivity

If the wind power jib is removed before transition, then the crane can transport to the next site, but extra hoist and transport vehicle are needed, increasing transition cost

Engineering Contradiction:

Improvetransition efficiencyVSAvoidauxiliary vehicles required

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The main boom is designed to serve multiple functions: it acts as both the primary structural element for lifting operations and as a support structure for transporting the wind power jib in an overturned state. This multi-functionality eliminates the need for separate auxiliary vehicles and hoists that would otherwise be required for jib transport.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The transport function for the wind power jib is merged with the existing main boom structure. The jib is positioned and supported using the main boom's own structural capacity and the overturning mechanism, combining the lifting and transport functions into a single integrated system rather than requiring separate auxiliary equipment.

Inventive Principle:

Principle #5Merging (Combining)

3Loss of time

If the wind power jib is kept attached during transport, then no installation/removal is needed, but the crane's dead weight and long arm length create unbalanced gravity center

Engineering Contradiction:

Improvetransition timeVSAvoidgravity center balance

Core Design Contradiction:

Loss of timeVSStability of the object's composition

Solution Approach 1:

The wind power jib is positioned in a dynamic overturned state on the main boom during transport, rather than being fixed in its normal operational position. This dynamic repositioning allows the jib to be accommodated on the main boom while maintaining balance, as the overturned configuration changes the gravity center distribution to be compatible with the crane's structural limitations.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method reduces the need for auxiliary vehicles and labor, streamlining the transition process and lowering costs by utilizing the crane's existing structure for efficient transport of the wind power jib.

Implementation Method 1

releasing the traction means, such that the wind power jib overturns under the effect of self gravity and a cushioning member

Methodology Applied

Scientific EffectGravity: Gravitation

Implementation Method 2

contacting a cushioning member with the wind power jib provided at the first preset position

Methodology Applied

Scientific EffectCushioning: Damping

Data Source

PatentUS11247878B2Operating method of a wind power jib of a crane and crane

Publication Date: 2022.02.15 XUZHOU HEAVY MASCH CO LTD

AI summary

The present disclosure discloses an operating method of a wind power jib of a crane and a crane, and relates to the field of engineering machinery. The method includes the following steps: rotatably connecting a main boom and a wind power jib; overturning the wind power jib to a first preset position by using a traction means of the crane; contacting a cushioning member with the wind power jib provided at the first preset position; further drawing the wind power jib to overturn to a second preset position; releasing the traction means, such that the wind power jib overturns automatically under the effect of self gravity and a cushioning member until the wind power jib is overturned in position.