Fire-fighting Foam Tank Bladder Rupture Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fire-fighting foam stock tanks obstruct maintenance access due to the liquid collecting pipe, and the bladder is at risk of rupture when expanding through the maintenance hole.
Innovation Solution
The fire-fighting foam stock tank features a T-shaped liquid collecting pipe structure and a bladder design that adapts to this shape, with a flange and hole plug mechanism to prevent obstruction and bladder rupture, allowing unobstructed maintenance access without disassembling the pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the liquid collecting pipe is connected to the maintenance hole, then the foam stock solution can be collected and drained, but the maintenance personnel are blocked by the pipe when entering the tank
Solution Approach 1:
The liquid collecting pipe is segmented into multiple sections with detachable connections. The pipe is divided into a first pipe section connected to the foam injection hole and a second pipe section that can be detached from the maintenance hole, allowing maintenance personnel to remove the second section for unobstructed access while retaining the pipe structure for normal operation
Solution Approach 2:
The pipe structure transitions from a fixed rigid configuration to a dynamic, adjustable arrangement. The detachable connections and flexible positioning allow the pipe to be reconfigured during maintenance - removed from the maintenance hole path when needed, and reinstalled when maintenance is complete, providing operational flexibility
2Ease of operation
If the bladder expands through the maintenance hole, then the foam stock solution can be accessed, but the bladder may rupture from external pressure
Solution Approach 1:
A protective cover is pre-installed over the maintenance hole that creates a controlled access pathway. Before bladder expansion, the cover is positioned to guide and protect the bladder as it expands toward the maintenance hole, preventing direct exposure to external pressures and physical damage
Solution Approach 2:
The protective cover structure provides a cushioning barrier between the bladder and the external environment. When the bladder expands toward the maintenance hole, the cover absorbs and distributes external pressures, preventing concentrated forces that could cause rupture while still allowing controlled access
3Stability of the object's composition
If the liquid collecting pipe is fixed in position, then the structure is stable, but maintenance personnel must disassemble the pipe to enter the tank
Solution Approach 1:
The pipe structure is divided into detachable sections with standardized connections. The main body of the pipe remains fixed and stable for structural integrity, while the section at the maintenance hole can be easily detached and reattached, providing both stability during operation and ease of access during maintenance
Solution Approach 2:
The pipe system incorporates dynamic elements that allow it to transition between fixed and movable states. During normal operation, the pipe maintains a stable fixed position; during maintenance, the detachable sections can be quickly removed to allow personnel entry, then reinstalled to restore the stable configuration
Data Source
AI summary
A fire-fighting foam stock tank includes a stock solution tank, a bladder set inside the stock solution tank, and a liquid collecting pipe installed inside the bladder. The stock solution tank has a first end tank wall provided with a first maintenance hole and a first hole cover. There is a hole plug on the inner surface of the first hole cover, so that the hole plug extends into the first maintenance hole until it is close to the inner wall surface of the stock solution tank, so that the inner wall surface is kept flat. The liquid collecting pipe is a T-shaped pipe composed of a first pipe section and a second pipe section. The bladder fits the liquid collecting pipe shape.