Steam Valve Guide Structure to Suppress Main Valve Abrasion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing steam valves face challenges in suppressing abrasion of the stop valve due to potential swinging or rotation of the main valve relative to the valve rod, especially when the sub valve is opened, as the fitting portion between the valve rod and valve body has a short axial distance, leading to increased wear.
Innovation Solution
The steam valve design includes a valve body with a flow path partition portion, a stop valve featuring a valve rod with a sub valve and main valve, and a guide portion that moves in the axial direction to guide the sub valve, ensuring it slides along the axis, thereby preventing swinging and supporting the main valve to reduce abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fitting portion between the valve rod and valve body has a short axial distance, then the structure is more compact, but the main valve cannot be properly supported and may swing or rotate causing abrasion
Solution Approach 1:
The valve rod is divided into multiple functional segments: a fitting portion for connection, a guide portion for preventing swing, and a support portion for preventing rotation. This segmentation allows each part to perform its specific function independently, resolving the contradiction between compact structure and abrasion suppression.
Solution Approach 2:
The solution addresses the short axial distance problem by utilizing radial dimensions. The guide portion extends radially from the valve rod to guide the main valve, while the support portion provides circumferential engagement. This dimensional approach allows proper support without increasing axial length.
2Ease of operation
If the main valve is allowed to move freely with steam flow, then the operation is simpler, but the valve body rotates or rattles causing wear and reduced reliability
Solution Approach 1:
The guide portion acts as an intermediary between the main valve and the valve rod. It provides guidance and constraint during valve operation, preventing harmful rotation and rattling while allowing necessary movement. This intermediary structure maintains reliability without complicating the basic operation.
Solution Approach 2:
The support structure is designed to be dynamic rather than rigidly fixed. The guide portion and support portion allow the main valve to move with steam flow while maintaining proper alignment and preventing harmful movements. This dynamic approach balances ease of operation with abrasion suppression.
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
This configuration effectively suppresses abrasion of the stop valve by stabilizing the main valve, ensuring smooth operation and reducing wear, even under varying steam flow conditions.
Implementation Method 1
guides a side surface of the sub valve to be slidable along the axial direction
Implementation Method 2
closes the steam flow path by abutting the valve seat
Implementation Method 3
the through-hole provided in the main valve is opened to reduce the differential pressure between the upstream and downstream of the main valve
Data Source
AI summary
A steam valve with a valve body that includes a flow path partition part that partitions a steam flow path through which steam flows; and a valve seat provided halfway through the steam flow path and having an opening part. The steam valve is provided with a stop valve, which includes a valve rod extending in an axial direction in which an axial line extends, and capable of advancing and retracting in the axial direction. The stop valve includes a child valve fixed to the tip-end of the valve rod in a tip-end part of the valve rod. The stop valve includes a parent valve that includes a penetration part into which a portion of the tip-end part of the valve rod positioned closer to the base end side of the valve rod than to the tip-end is inserted, closes the steam flow path when abutted on the valve seat.