Stepped Valve Plug Sealing for Fast High-Pressure Pump Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high-pressure pump valves, particularly those used in medical sterilization, face issues with complex structures, incomplete sterilization due to die chamber formation, high performance requirements, and poor sealing efficiency, especially under high pressures, leading to risks and excessive medium leakage.
Innovation Solution
A valve plug with a simple structure featuring a sealing surface and a step on one end surface, with positioning bosses and a recess, allowing for rapid sealing and improved energy transmission efficiency, and a high-pressure pump structure with valve plug chambers and piston chambers that facilitate efficient fluid communication and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-preloaded valve plate is used for sealing, then sealing function is achieved, but the structure becomes complex and die chamber formation occurs resulting in incomplete sterilization
Solution Approach 1:
The patent removes the spring component from the valve structure, extracting the problematic element that caused complexity and sterilization issues. The valve plug achieves sealing without springs, using a simple conical structure that can be fully sterilized.
Solution Approach 2:
Instead of using a spring to push the valve plate against the seat, the invention inverts the approach by using fluid pressure and the conical geometry to achieve self-sealing. The valve plug is pushed against the sealing surface by pressure differential, not by a mechanical spring.
2Reliability
If a spring-preloaded valve plate is used, then sealing is achieved, but performance requirements for the spring are very high and effectiveness is difficult to judge under high pressures
Solution Approach 1:
The valve plug structure is self-regulating under pressure. The conical geometry and positioning bosses automatically ensure proper sealing contact without requiring precisely controlled spring properties. The structure itself provides the sealing force through pressure differential.
3Ease of operation
If steel balls are used as valve sealing body for self-sealing, then self-sealing function is achieved, but reversing efficiency is poor leading to excessive medium leakage
Solution Approach 1:
The invention uses a conical sealing surface and conical valve plug geometry instead of spherical steel balls. The conical shape provides better contact area and sealing pressure distribution, improving sealing effectiveness while maintaining self-sealing operation.
4Reliability
If a complex valve structure is used to meet medical sterilization and high pressure requirements, then sterilization and pressure resistance are achieved, but the response time of the valve increases
Solution Approach 1:
The valve structure is segmented into simple, discrete components: a conical valve plug with positioning bosses that fits into a valve chamber. This segmentation allows for simple manufacturing, complete sterilization, and rapid response without complex internal mechanisms.
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 solution achieves rapid sealing, reduces machining precision requirements, and enhances energy transmission efficiency, improving the reliability and safety of high-pressure pump operations while minimizing leakage and manufacturing complexity.
Implementation Method 1
When the pressure of the liquid outlet channel is higher than that of the liquid inlet channel, the liquid flows towards the inlet channel, and the valve plug moves towards the sealing surface under the action of pressure differential
Implementation Method 2
the valve plug moves towards the sealing surface under the action of pressure differential until the sealing surface is in tight contact with the end surface of the valve plug chamber close to the liquid inlet channel
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Disclosed herein is a valve plug (10) comprising a valve plug body (11); one end surface of the valve plug body (11) is configured as a sealing surface (111), and the other end surface of the valve plug body (11) facing away from the sealing surface (111) is provided with a step (12); an outer diameter of the valve plug body (11) gradually increases from the one end surface to the other end surface, and the sealing surface (111) of the valve plug body (11) can be of various shapes such as a spherical surface, a conical surface, or a flat surface. The valve plug is simple in structure, and can shorten the sealing response time, increase the working effect of a high-pressure pump, and reduce the machining difficulty while ensuring the sealing effect. Also disclosed are a high-pressure pump structure and a valve plug sealing method.