Protective Cage Valve for IBC Liner Bag Discharge
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Solution Overview
Problem
Current valves used in Intermediate Bulk Container (IBC) liner bags are prone to blockage during emptying due to the liner bag wall being sucked into the valve, leading to equipment downtime and potential contamination, and are expensive and not widely used due to high costs for single-use applications.
Innovation Solution
A valve design featuring a protective cage positioned inside the bag to prevent the bag wall from collapsing into the valve opening, with a permeable face plate and a flange to retain the valve in the container, allowing for continuous flow and preventing bag rupture, and constructed from low-cost plastic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional valve with cutter pusher is used, then the membrane can be pierced to allow discharge, but the liner bag wall becomes drawn into the valve causing blockage
Solution Approach 1:
A protective cage is introduced as an intermediary component between the valve opening and the liner bag wall. The cage acts as a physical barrier that prevents the flexible bag wall from being drawn into the valve opening during discharge, thereby eliminating blockage while maintaining operational functionality.
Solution Approach 2:
The protective cage divides the valve area into distinct zones: the cage-protected zone around the valve opening and the surrounding bag wall area. This segmentation isolates the critical valve components from direct contact with the flexible bag wall, preventing entanglement and blockage.
2Reliability
If current expensive valves are used, then valve function is provided, but cost is high for single-use applications
Solution Approach 1:
The valve assembly is designed as a disposable, low-cost component suitable for single-use applications. The simple construction using basic elements like a cage, valve member, and seat allows for economical manufacturing, making the valve cost-effective for temporary or single-use containers where replacement is more economical than repair or complex design.
3Productivity
If the valve allows complete emptying, then discharge efficiency is improved, but the liner bag may be sucked into the outlet causing contamination
Solution Approach 1:
The protective cage is installed in advance before discharge operations begin. This preliminary protective measure ensures that during rapid emptying operations, the bag wall cannot be drawn into the valve opening, allowing complete and rapid emptying without contamination risk.
Data Source
Figure 1~2
Figure 3~4
AI summary
A valve for use with a liner bag for a container, and a liner bag including a valve, the valve including a valve member located in a valve seat and having a valve opening for egress of liquids from the liner bag. An operating lever is positioned outside the liner bag. A protective cage extends in front of the valve opening, the cage being positioned inside the liner bag to prevent the wall of the liner bag from collapsing into the valve opening during emptying of liquids from the liner bag. A flange may extend around the valve seat to retain the valve in the wall of the liner bag. This arrangement prevents the liner bag wall from clogging the valve during discharge of the bag's contents.