Zipper Closure Filter Bag for Pressure Leaf Filter Installation
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Solution Overview
Problem
The conventional manual sewing process for installing filter bags in pressure leaf filters is unsafe, time-consuming, and ergonomically challenging, requiring multiple trained individuals and prone to quality issues, which can lead to production losses and clogging due to potential failures in the sewing.
Innovation Solution
A novel filter bag design featuring a single pocket with a zipper and hook-and-loop fastener for easy installation, eliminating the need for manual sewing machines, and allowing for secure sealing and quick replacement, suitable for both vertical and horizontal pressure leaf filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual sewing machine is used to seal filter bag, then filter bag can be sealed, but installation process is unsafe and time-consuming
Solution Approach 1:
The patent replaces the manual sewing machine mechanical system with a zipper closure system. The zipper consists of two interlocking components that can be quickly engaged and disengaged without requiring manual sewing operations, thereby eliminating the time-consuming and unsafe manual sewing process while maintaining reliable sealing through the zipper's interlocking mechanism.
Solution Approach 2:
The patent extracts the sealing function from the manual sewing process and implements it through a dedicated zipper closure system. The zipper is integrated into the filter bag structure, allowing the sealing function to be performed independently of manual sewing operations, thus resolving the contradiction between sealing quality and installation time.
2Reliability
If manual sewing machine is used to seal filter bag, then filter bag can be sealed, but requires multiple trained individuals
Solution Approach 1:
The patent replaces the complex manual sewing operation with a simple zipper engagement action. The zipper closure system requires only basic manual dexterity to open and close, eliminating the need for trained operators and reducing installation complexity while maintaining reliable sealing through the mechanical interlocking of the zipper components.
Solution Approach 2:
The zipper closure system is designed to be self-contained and self-explanatory, requiring no specialized training or external assistance. The interlocking mechanism of the zipper provides intuitive feedback during operation, allowing any operator to perform the sealing function reliably without extensive training.
3Reliability
If manual sewing machine is used to seal filter bag, then filter bag can be sealed, but causes ergonomic issues due to weight
Solution Approach 1:
The patent extracts the sealing function from the heavy manual sewing machine and integrates it into the filter bag structure through a lightweight zipper closure system. This eliminates the need to handle and operate heavy sewing equipment, resolving the ergonomic issues caused by the weight of the sewing machine while maintaining reliable sealing through the zipper's mechanical interlocking.
4Reliability
If manual sewing machine is used to seal filter bag, then filter bag can be sealed, but requires maintenance of sewing machine
Solution Approach 1:
The patent replaces the manual sewing machine with a zipper closure system that has no moving parts requiring maintenance. The zipper components are stationary and simply engage or disengage, eliminating all maintenance requirements associated with sewing machines such as needle replacement, thread management, and mechanical adjustments, while maintaining reliable sealing through the zipper's interlocking mechanism.
5Reliability
If manual sewing is performed, then filter bag can be sealed, but quality of sewing is crucial and failures cause production loss
Solution Approach 1:
The patent replaces the manual sewing process with a zipper closure system that eliminates variability in sealing quality. The zipper's mechanical interlocking provides consistent and reliable sealing every time it is engaged, removing the risk of poor-quality sewing that could lead to production losses, while enabling rapid installation that improves overall productivity.
Data Source
AI summary
A leaf filter bag for a leaf (110) of a pressure leaf filter (100) has a first sheet portion (50), adjacent to a second sheet portion (60). The first sheet portion (50) is connected to the second sheet portion (60) at a first edge (10), a second edge (20) and a third edge (30). Forth edges of the sheet portions define an openable and closable edge (40) which has an open position and a closed position, which allows inserting a frame (122) of the leaf (110) into the leaf filter bag (1) through an opening formed by the openable and closable edge (40) in the open position. A zipper (42) closure (41) is provided at the openable and closable edge (40), and a further hook-and-loop fastener closure may be provided.