Grease Trap Safety Barrier Preventing Falls
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Solution Overview
Problem
Conventional grease traps pose a safety risk as children can fall into the tank when the cover is not securely replaced during maintenance, leading to potential accidents.
Innovation Solution
A grease trap design featuring a tank with a cover that has a hatch and a barrier spanning the open top, preventing falls by ensuring the cover remains secure, along with a divider for separating waste and a sensor for monitoring FOG levels, which allows for safe pumping without fully removing the cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is removed for pumping operations, then maintenance access is improved, but safety risk increases due to potential falls
Solution Approach 1:
A barrier structure is introduced as an intermediary element between the open tank interior and the external environment. The barrier includes a vertical wall that extends downward from the cover interior surface, creating a physical obstruction that prevents falls while still allowing maintenance personnel to access the tank through the hatch opening.
Solution Approach 2:
The cover structure is segmented into multiple functional zones: an outer cover portion, an intermediate barrier portion with vertical walls, and a hatch opening. This segmentation allows the cover to simultaneously provide safety protection and maintenance access without requiring complete removal.
2Object-affected harmful factors
If the cover is securely fixed, then safety is improved, but accessibility for maintenance deteriorates
Solution Approach 1:
The cover is designed with dynamic characteristics - it can be in a secured state during normal operation to prevent falls, and can be opened through the hatch mechanism when maintenance is required. The barrier structure remains in place throughout, providing continuous protection while allowing controlled access.
3Object-affected harmful factors
If a barrier is added to prevent falls, then safety is improved, but device complexity increases
Solution Approach 1:
The barrier structure serves multiple functions simultaneously: it acts as a fall prevention barrier, provides structural support for the cover, and creates a protective enclosure around the tank opening. This multi-functionality reduces the need for separate safety devices, thereby limiting the increase in overall system complexity.
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 safety by preventing accidental falls and simplifies the pumping process, reducing the risk of incidents and ensuring secure operation of the grease trap.
Implementation Method 1
A barrier spans a diameter of the open top below the cover and has an opening vertically below the hatch. Typically, the barrier is extensive enough to prevent a child from falling into the tank if the cover is removed from the tank.
Implementation Method 2
The tank has a divider that divides the tank into an upper chamber and a lower chamber and that has a hole for allowing FOG into the upper chamber from the lower chamber
Implementation Method 3
Lightweight grease rises to the top of the tank and heavier solids settle in the bottom of the tank
Implementation Method 4
A sensor for sensing a FOG level in the tank and having a tether suspended from the upper lid may be positioned at the intermediate lid
Implementation Method 5
This is done by removing a cover that is generally co-planar with the parking surface, inserting a suction device, suctioning the contents of the trap into the truck
Data Source
AI summary
A grease trap for separating waste from wastewater includes a tank having an outer wall, bottom and open top. An inlet invert in the tank receives incoming wastewater, and an outlet invert removes water from the tank. The tank has a cover on the open top, and the cover has a hatch. A barrier spans a diameter of the open top below the cover and has an opening vertically below the hatch. A divider divides the tank into an upper chamber and a lower chamber and has a hole for allowing FOG into the upper chamber from the lower chamber, the hole being colinearly aligned with the hatch and the opening in the barrier.