Drainage Pipe Gas Return Prevention With Floating Ball Water Seal
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Solution Overview
Problem
Existing drainage pipe systems face challenges in simultaneously preventing gas return and ensuring effective sewage discharge, particularly in biogas digesters where toxic gases can lead to explosions, as traditional water seals and check valves cannot be used concurrently and fail to prevent gas channeling during sewage discharge.
Innovation Solution
A return gas prevention device for drainage pipes that integrates a water seal and check valve functionality, utilizing a floating ball mechanism with guiding and blocking structures to control gas and sewage flow through multiple communication pipes and valves, ensuring gas discharge and preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water seal is used to prevent gas return, then gas return prevention is improved, but sewage discharge speed deteriorates due to pressure during discharge
Solution Approach 1:
The invention uses a dynamic check valve mechanism with a valve body that can move between open and closed positions. During normal sewage discharge, the valve opens to allow rapid flow. When gas pressure reverses, the valve automatically closes to prevent gas return. This dynamic adjustment resolves the contradiction by adapting the seal state to operational conditions.
Solution Approach 2:
The check valve is pre-positioned to close automatically when gas pressure exceeds sewage pressure, preventing gas return before it can channel back through the drainage pipe. This preliminary protective action maintains gas prevention reliability without continuously restricting sewage flow.
2Reliability
If a check valve is used to prevent gas return, then gas return prevention is improved, but sewage discharge speed deteriorates due to pressure during discharge
Solution Approach 1:
The check valve mechanism dynamically adjusts its state based on pressure differential. During sewage discharge, the valve remains open to maintain high discharge speed. When gas pressure builds up and reverses flow direction, the valve automatically closes to prevent gas return. This dynamic behavior resolves the contradiction between maintaining discharge speed and preventing gas return.
3Reliability
If traditional water seals or check valves are used, then gas return prevention is achieved in no-discharge conditions, but gas channeling occurs during sewage discharge
Solution Approach 1:
The check valve dynamically transitions between open and closed states based on flow conditions. During sewage discharge, the valve opens to allow sewage flow while preventing gas channeling through its one-way valve design. When discharge stops and gas pressure reverses, the valve closes to seal against gas return. This dynamic adaptation eliminates gas channeling during discharge while maintaining prevention capability when idle.
4Reliability
If multiple communication gas pipes and valves are added to control gas and sewage flow, then gas discharge and backflow prevention are improved, but device complexity increases
Solution Approach 1:
The invention merges the water seal function and check valve function into a single integrated device. The valve body serves dual purposes: as a sealing element for gas prevention and as a flow control mechanism for sewage discharge. This consolidation achieves reliable gas discharge and backflow prevention while minimizing device complexity by eliminating the need for separate water seal and check valve components.
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 device effectively prevents gas channeling and backflow while ensuring reliable sewage discharge, even in biogas digesters, by using a floating ball mechanism to control the opening and closing of communication pipes and valves, thus enhancing safety and efficiency.
Implementation Method 1
The floating ball is located inside the upper cavity. The guiding structure enables the floating ball to move up and down in the upper cavity along with rise and fall of a water level
Data Source
AI summary
The present disclosure provides a return gas prevention device for a drainage pipe, belonging to the technical field of drainage pipes. The device realizes two functions of water seal and a check valve simultaneously, as well as prevents gas channeling in a drainage process.