Lifting Tool for Gyratory Crusher Wear Parts
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Solution Overview
Problem
The existing methods for lifting inner wear parts of gyratory or cone crushers are unreliable, pose safety risks, and require additional welding, which complicates the process and increases the risk of damage to the crusher during lifting, especially when dealing with manganese steel materials in challenging construction conditions.
Innovation Solution
A method and tool that utilize a lifting tool with a second inner support surface on the inner wear part, allowing for secure coupling without the need for welding, and a safety device to prevent overload, ensuring safe and reliable lifting by creating a lifting tool space between the inner wear part and the support cone, eliminating the need for external lifting points and reducing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If projections are casted on the wear part for lifting, then lifting is enabled, but the projections are worn off and require welding which increases complexity and safety risks
Solution Approach 1:
The lifting function is segmented from the wear part itself. Instead of modifying the wear part with projections or welding, a separate lifting tool is used that interfaces with the wear part through the torch ring opening. This separates the lifting mechanism from the wear part structure, eliminating the need for welding modifications.
Solution Approach 2:
The lifting tool acts as an intermediary between the lifting device and the wear part. It couples with the wear part through the existing torch ring opening without requiring welding, providing a reliable lifting interface that doesn't compromise the wear part structure or require additional welding operations.
2Ease of operation
If welding is performed to attach lifting points, then lifting is enabled, but the process becomes complex and time-consuming
Solution Approach 1:
The lifting tool is designed to utilize the pre-existing torch ring opening in the wear part, eliminating the need for preliminary welding actions. The tool can be directly coupled and locked into the opening, allowing immediate lifting without time-consuming welding operations or quality control procedures.
Solution Approach 2:
The lifting tool is designed as a separate, potentially replaceable component rather than a permanent welded attachment. This approach allows for simpler, faster installation and removal without the complexity of welding, and the tool can be replaced if worn or damaged without affecting the wear part itself.
3Productivity
If lifting is performed on worn parts, then replacement is enabled, but welding quality control becomes difficult
Solution Approach 1:
The lifting function is extracted from the wear part structure itself and transferred to a separate lifting tool. This extraction eliminates the need for welding operations on the wear part, whether new or worn, removing the quality control issues associated with welding on difficult-to-weld materials like manganese steel in field conditions.
Solution Approach 2:
The lifting tool serves as an intermediary that interfaces with the wear part through the torch ring opening without requiring welding. This intermediary approach allows for reliable attachment and detachment of lifting capability without compromising the structural integrity or quality of the wear part, regardless of its wear condition.
4Ease of operation
If lifting tool is used without full locking, then lifting is enabled, but work safety cannot be guaranteed
Solution Approach 1:
The lifting tool incorporates a locking mechanism that prevents accidental detachment before the lifting operation is complete. This prior cushioning measure ensures that the wear part cannot detach unexpectedly during lifting, providing inherent safety without requiring complex control systems or operator intervention.
Solution Approach 2:
The lifting tool with its locking mechanism acts as a safe intermediary between the lifting device and the wear part. It provides a controlled, secure interface that ensures full locking during lifting operations, preventing accidental detachment while maintaining ease of operation for authorized personnel.
Data Source
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AI summary
A method for lifting method for lifting an inner wear part (11, 21) of a gyratory or cone crusher (105) which gyratory or cone crusher comprises a frame, an outer wear part fixable to the frame and the inner wear part fixable to a support cone (10, 20) of the crusher which outer and inner wear part define together a crushing chamber for receiving crushable material, and the inner wear part comprises an inner surface to which is formed a first inner support surface (16) which is arranged, in a crushing phase, to be supported by a first counter surface (17) of the support cone, the method comprising arranging in a first phase a lifting arm (31, 32; 41, 42) of a lifting tool (30, 30'; 40, 40') inside the inner wear part (11, 21) and under the inner surface of the inner wear part, and coupling in a second phase an upper second counter surface (38) of the lifting arm of the lifting tool with a second inner support surface (15) of the inner wear part which second inner support surface is formed to an upper section of the inner surface of the wear part. An inner wear part. A gyratory or cone crusher. An inner wear part lifting tool.