Delivery Cylinder Connection for Thick Material Pumps
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Solution Overview
Problem
Existing thick matter pumps, such as concrete pumps, face challenges with high tensile forces acting outwardly, which are not efficiently managed by traditional tie rods or flange connections, leading to increased dead weight and space usage.
Innovation Solution
A thick matter conveying device where the delivery cylinder is attached to the collection container using a positive connection for tensile forces and a separate screw connection for compressive forces, allowing for a more compact design and stable force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If tie rods are used to connect delivery cylinders to the collection container, then tensile forces are transmitted, but the dead weight increases significantly
Solution Approach 1:
The connection system is segmented into two distinct connection types: a first connection for tensile forces and a second connection for compressive forces. This segmentation allows each connection to be optimized for its specific force type, eliminating the need for heavy tie rods that must handle both force types simultaneously.
Solution Approach 2:
Instead of using a single robust connection (tie rod) that handles both tensile and compressive forces, the invention inverts the approach by using two specialized connections: a form-fit connection for tensile forces and a screw connection for compressive forces. This inversion allows lighter, more efficient connection elements to be used for each force type.
2Ease of operation
If flange connections are used on the outside of the collection container, then connections are provided, but space is consumed excessively
Solution Approach 1:
The first connection element is nested within or integrated with the second connection element. The form-fit connection for tensile forces is positioned within the same region as the screw connection for compressive forces, allowing both connections to occupy the same spatial footprint rather than requiring separate external flange locations.
Solution Approach 2:
The connection system transitions from a two-dimensional external flange arrangement to a three-dimensional integrated connection where the first connection element is positioned within the structure of the second connection element, utilizing internal space rather than external surface area.
3Device complexity
If a single connection type is used for both tensile and compressive forces, then the connection structure is simple, but the design becomes bulky and less efficient
Solution Approach 1:
Each connection element is designed with local quality optimized for its specific function: the first connection element has a form-fit geometry optimized for tensile force transmission, while the second connection element has a screw thread geometry optimized for compressive force transmission. This local optimization allows compact, efficient designs for each connection type.
Data Source
Figure 1~2
AI summary
The present invention relates to a conveying device for thick materials, in particular for conveying concrete, which comprises at least one conveying cylinder by means of which thick material can be conveyed from a thick material collection container into a conveying line. According to the invention, the conveying cylinder is attached to the thick material collection container in such a way that tensile forces acting on the conveying cylinder during the conveying of the thick material are transmitted to the thick material collection container via a positive-locking connection, and opposing compressive forces are transmitted to the thick material collection container via a further connection.