Rod-Shaped Urea Water Valve for Freeze-Resistant Drain Control
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Solution Overview
Problem
Existing operation valves for urea water tanks in diesel engine exhaust gas purification systems are complex and costly, and they may fail due to freezing of urea water, which complicates quality checks and increases product costs.
Innovation Solution
A rod-shaped operation valve with a barrel, head, and leg portion, featuring a housing body and an operation dial screw, which allows for controlled flow of urea water without a ball valve structure to prevent freezing-related failures and simplify the design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ball valve structure is used to prevent freezing-related failures, then reliability is improved, but device complexity increases and product cost increases
Solution Approach 1:
The patent extracts and removes the ball valve component from the operation valve structure. By eliminating the ball valve, the patent avoids the complexity and cost associated with it while preventing the accumulation of urea water that causes freezing issues. The flow path is designed to allow complete drainage without requiring a ball valve mechanism.
Solution Approach 2:
The operation valve is segmented into distinct functional components: a valve body with a flow path, a valve closing member, and a operating mechanism. This segmentation allows each component to perform its specific function efficiently without the need for a complex ball valve structure, simplifying the overall design while maintaining reliability.
2Reliability
If a ball valve structure is used to prevent freezing-related failures, then reliability is improved, but product cost increases
Solution Approach 1:
The patent extracts and removes the ball valve component from the operation valve structure. By eliminating the ball valve, the patent avoids the complexity and cost associated with it while preventing the accumulation of urea water that causes freezing issues. The flow path is designed to allow complete drainage without requiring a ball valve mechanism.
Solution Approach 2:
The patent employs simpler, more cost-effective materials and manufacturing methods for the operation valve components. The valve body and closing member are designed to be manufactured using conventional, cost-efficient processes rather than requiring precision-machined ball valve components, thereby reducing product cost while maintaining functional reliability.
3Ease of operation
If the drain plug is removed for quality check, then accessibility is improved, but a large amount of urea water is ejected which is inconvenient
Solution Approach 1:
The operation valve incorporates a dynamic flow control mechanism where the valve closing member can be positioned at different locations within the flow path. During quality checks, the valve is opened to a controlled extent to allow only a small amount of urea water to be ejected, while during normal operation, the valve provides complete drainage. This dynamic control resolves the contradiction between accessibility and excessive ejection.
Solution Approach 2:
The patent changes the flow rate parameter by using the valve closing member to restrict the flow path opening during quality checks. This parameter adjustment allows operators to perform quality checks with minimal urea water ejection, making the process convenient and manageable while still maintaining accessibility for inspection purposes.
Data Source
AI summary
An operation valve includes a valve formed into a rod shape and including a barrel portion in which a flow path for a fluid is provided, a head portion in which an inlet of the flow path is provided, and a leg portion in which an outlet of the flow path is provided, a housing body housing the barrel portion, and an operation dial screw coupled to the housing body and moving the valve in an extension direction of the valve.