Lidded Container With Welded Inliner for Hazardous Liquid Tightness
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Solution Overview
Problem
Conventional lidded containers with inserted liners are limited in their ability to maintain tightness under high loads, particularly in critical diagonal falls, leading to leaks and restricting their use to non-hazardous contents, and they do not achieve high enough UN approval for dangerous liquids.
Innovation Solution
A lidded container design where the inliner and container lid are permanently connected in a gas-tight and liquid-tight manner, with filling and emptying through small bung openings, and the container body is only involved in supporting, allowing for higher UN approvals and cost-effective reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lidded containers with inserted liners are used, then the container body can be reused, but the container leaks under high loads such as critical diagonal falls
Solution Approach 1:
The container is divided into three functional segments: the reusable outer container body, the permanently connected inliner-lid assembly, and the sealing interface. This segmentation allows the inliner and lid to form a unified sealing unit that remains isolated from the container body during impact, preventing leaks while preserving the body for reuse.
Solution Approach 2:
The inliner acts as an intermediary element that permanently connects to the lid, creating a sealed compartment that isolates the hazardous liquid from the container body. This intermediary connection ensures that under impact loads, the sealing function is maintained through the inliner-lid interface rather than relying on the container body-lid connection.
2Adaptability or versatility
If lidded drums are used for dangerous liquids, then economic and ecological reuse is enabled, but they cannot achieve high UN approval for dangerous liquids due to leak risks
Solution Approach 1:
The inliner and lid are permanently merged into a single functional unit through connection methods such as welding, adhesives, or heat sealing. This merging ensures that under impact or pressure loads, the sealing interface remains intact and isolated from the container body, enabling the assembly to meet high UN approval requirements for dangerous liquid transport.
3Reliability
If the container body is directly involved in sealing the liquid filling, then sealing is achieved, but the container body cannot be reused due to contamination
Solution Approach 1:
The sealing function is extracted from the container body and transferred to the inliner-lid assembly. The inliner is permanently connected to the lid, forming a sealed compartment that contains the liquid filling. This extraction allows the container body to be separated from the sealing function, enabling its reuse after emptying without contamination concerns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances liquid tightness and internal pressure resistance, preventing leaks under impact and allowing for the use of dangerous liquids, achieving performance comparable to bung-head drums while enabling multiple reuse of the outer container.
Implementation Method 1
The inliner is permanently connected in a gas-tight and liquid-tight manner to the container lid, in particular welded, adhered or heat-sealed to the container lid
Implementation Method 2
The inliner is permanently connected in a gas-tight and liquid-tight manner to the container lid, in particular welded, adhered or heat-sealed to the container lid
Implementation Method 3
The filling and emptying takes place exclusively via one or two small bung openings (e.g. 2 inch opening) in the container lid, which can be closed gas and liquid-tight by means of appropriate screw lids or bung plugs
Implementation Method 4
with a clamping ring closure (16) placed on the container opening (36) of the container body (12) and pressing the container lid (14) onto the container opening (36)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a container having a lid for storing and transporting in particular hazardous liquid filling materials, comprising an outer container body, an upper container lid and an inserted thin-walled inliner. The container lid comprises at least one filling and emptying opening that can be closed in a gas- and fluid-tight manner and that, for example, can be attached by means of a U-shaped clamping ring closure or without clamping ring as a snap cover by means of snap closure or a screw lid by means of screw closure on the upper container opening of the container body on a correspondingly designed flange edge. The thin-walled inliner (26) is fixed on the bottom side of the container lid (14) in the outer circumferential region in a gas- and fluid-tight manner, wherein the container lid (14) and inliner (26) form a gas- and fluid-tight hollow body unit. The container body, which can be used multiple times, is only provided as a support and protection unit for the inliner.