Pressure-Regulating Valve Spring Replacement Design
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Solution Overview
Problem
Conventional pressure-regulating valves for inkjet printers require replacement of entire units when switching between functional liquids of different specific gravities, leading to complex adjustments and potential corrosion issues, as the springs cannot be replaced independently.
Innovation Solution
A pressure-regulating valve design where the valve-disc energizing spring and negative-pressure holding spring can be easily replaced by detaching a lid body, allowing for the use of common replacement parts regardless of the functional liquid's material features, eliminating the need for full valve replacement or adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire pressure-regulating valve is replaced when switching functional liquids, then reliability is improved, but loss of time and device complexity increase
Solution Approach 1:
The pressure-regulating valve is divided into separate replaceable components (spring assembly, diaphragm assembly, valve body), allowing individual parts to be replaced without replacing the entire valve. This segmentation enables quick spring replacement while maintaining overall valve reliability.
Solution Approach 2:
The spring components are designed as disposable or easily replaceable parts that can be discarded after use, while the main valve body and other components are recovered and reused. This approach reduces replacement time and maintains reliability by ensuring fresh springs are used.
2Adaptability or versatility
If the entire pressure-regulating valve is replaced when switching functional liquids, then adaptability is improved, but device complexity increases
Solution Approach 1:
The valve is segmented into modular components with standardized interfaces, allowing different spring and diaphragm assemblies to be interchangeably mounted on the same valve body. This enables adaptability to different functional liquids without increasing overall device complexity.
Solution Approach 2:
The valve body and mounting structure are designed as universal components that can accommodate multiple types of springs and diaphragms for different functional liquids. This multi-functionality allows a single valve body to serve multiple purposes without becoming more complex.
3Reliability
If spring repulsion force is increased for high specific gravity liquids, then reliability is improved, but device complexity and adjustment difficulty increase
Solution Approach 1:
Different spring components are designed with varying repulsion force parameters to match different functional liquid specific gravities. Each spring is pre-calibrated for specific applications, eliminating the need for complex adjustments and reducing device complexity while maintaining reliable sealing.
4Ease of operation
If the valve is designed for easy spring replacement, then ease of operation is improved, but device complexity may increase
Solution Approach 1:
The spring assembly is segmented as a separate removable unit that can be easily detached from the valve body without disassembling the entire valve. This segmentation greatly simplifies spring replacement operations while the standardized connection interfaces prevent excessive device 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
Enables quick and efficient replacement of springs, reducing downtime and simplifying maintenance by allowing the use of common parts, regardless of the functional liquid's specific gravity or corrosion concerns.
Implementation Method 1
a valve-disc energizing spring for energizing the valve disc in a valve-closing direction
Implementation Method 2
When the second chamber has a negative pressure relative to atmospheric pressure as a result of ink ejection from the liquid droplet ejection head, the valve disc is opened in such a way that the diaphragm resists the negative-pressure holding spring and the valve-disc energizing spring
Implementation Method 3
a negative-pressure holding spring is disposed between the diaphragm and the housing such that the diaphragm is energized to resist atmosphere from the inside thereof
Implementation Method 4
a primary chamber (ink supplying chamber) which is formed by the housing and a first film member thermally welded thereto
Data Source
AI summary
In a pressure-regulating valve which supplies a functional liquid from a functional liquid tank to a functional liquid droplet ejection head, using, as a reference regulating pressure, atmospheric pressure which a diaphragm receives, a valve-disc energizing spring, which energizes a valve disc for opening and closing a communication passage communicating a primary chamber and a secondary chamber, is configured so as to be separated from a housing main body along with a lid body.