Filter Drum Fixation Using Undercut Grooves and Reinforced Edges
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Solution Overview
Problem
Existing pressure and/or vacuum filter devices face challenges in easily, quickly, and reliably fixing filter media to the filter drum, which affects the filtration process efficiency and reliability.
Innovation Solution
The device employs a filter drum with a seamless filter medium and a system of elongated fixation devices, including longitudinal and transverse-edge receiving grooves with undercuts and holding bodies, to securely attach the filter medium pieces without seams, using reinforcement ribbons and holding bodies for a form-fit and force-fit attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fixation methods are used to attach filter medium to the filter drum, then the filter medium can be fixed, but the fixation process is time-consuming and difficult to perform easily
Solution Approach 1:
The filter medium is divided into multiple separate filter medium pieces that can be individually handled and attached. Each piece has longitudinal-edges that engage with receiving grooves on the filter drum, allowing for modular installation rather than handling a single large continuous medium.
Solution Approach 2:
Receiving grooves with undercuts and holding bodies serve as intermediary structures between the filter medium pieces and the filter drum. These grooves provide a mechanical interface that simplifies attachment by capturing the longitudinal-edges of the filter medium pieces and securing them in place.
2Reliability
If filter medium pieces with seams are used, then the filter medium can be constructed from multiple pieces, but seams create potential leakage points and reduce reliability
Solution Approach 1:
The filter medium pieces are designed with longitudinal-edges that have specific local properties - they are engineered to engage with the receiving grooves. The edges may include reinforcement or specific geometric features that enable form-fit and force-fit attachment, while the rest of the filter medium maintains its filtering function.
Solution Approach 2:
The fixation system combines the filter cloth material with reinforcement elements (such as bias tape or hemstitching) along the longitudinal-edges. This composite structure provides both the filtering capability of the cloth and the mechanical strength needed for reliable attachment to the drum.
3Reliability
If a simple attachment method is used, then the fixation system is easy to operate, but the attachment may not be secure and reliable
Solution Approach 1:
The holding bodies are designed to be insertable and removable from the receiving grooves. During installation, the holding bodies are inserted to capture the longitudinal-edges of the filter medium pieces. The system allows for dynamic installation and maintenance operations while providing secure fixation during the filtration process.
Solution Approach 2:
The receiving grooves are formed with undercuts that create nested structures. The longitudinal-edges of the filter medium pieces are inserted into the grooves and captured by the undercut geometry, creating a nested arrangement where the filter medium is held within the groove structure, providing secure retention.
Data Source
Figure 1
Figure 2
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AI summary
Pressure and/or vacuum filter device 1, comprising a filter drum 3, a filter medium 9 which is arranged on an outer side 11 of the filter drum circumferential-wall 7, and a plurality of the fixation devices 13, by means of which the filter medium 9 is fixedly attached to the filter drum circumferential-wall 7, wherein the filter medium 9 comprises a plurality of filter medium pieces 9a which are separate from each other and which each are made of a filter cloth material und which each have filter medium piece longitudinal-edges 15, which are arranged opposite to each other and which are a seamless part of the filter cloth material and which extend parallel to the filter drum longitudinal-axis 5, wherein the plurality of fixation devices comprises a plurality of elongated longitudinal-edge receiving grooves 21 which are respectively formed on both sides with a respective elongated undercut, wherein the respective filter medium piece longitudinal-edge is provided with a filter medium longitudinal-edge reinforcement, which is flat ribbon shaped, and is arranged together with its flat ribbon shaped filter medium longitudinal-edge reinforcement within the respectively assigned undercut.