Gate Valve Stroke Limitation Adjustment Mechanism
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Solution Overview
Problem
Existing slide valves require tedious and time-consuming processes to activate the manual emergency device and maintain stroke limitation settings, with standard metric threads leading to inefficient and imprecise adjustments.
Innovation Solution
A cap with a grub screw that holds the threaded pin's selected position, allowing quick activation of the manual emergency device and precise adjustment of the stroke limitation without losing the previous setting, using a fine thread and lock nut for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a standard metric thread is used on the threaded pin, then the travel distance until manual emergency device activation is reduced, but the adjustment precision of the stroke limitation device becomes poor
Solution Approach 1:
The patent applies parameter changes by providing two different thread types: a standard metric thread (coarser pitch) for the manual emergency device activation, and a fine thread (finer pitch) for the stroke limitation adjustment. This allows each function to operate with optimal thread parameters - the standard thread enables faster activation with fewer turns, while the fine thread provides precise adjustment capability.
2Ease of operation
If the threaded pin is screwed in deeply to activate the manual emergency device, then the emergency function is activated, but the previous stroke limitation setting is lost
Solution Approach 1:
The patent segments the threaded pin into two distinct functional portions: a first portion with a standard metric thread for manual emergency device activation, and a second portion with a fine thread for stroke limitation adjustment. This segmentation allows the two functions to operate independently without interfering with each other's settings.
Solution Approach 2:
The cap serves as an intermediary component that provides separate access paths to the two threaded portions of the pin. The cap can be removed to access the first threaded portion for emergency activation, while the second threaded portion remains accessible through the cap for precise adjustment, preventing loss of settings.
3Ease of operation
If the lock nut is loosened and the threaded pin is unscrewed to activate the manual emergency device, then the emergency function works, but the process becomes tedious and time-consuming
Solution Approach 1:
The threaded pin is segmented into two portions with different thread types and functions. The first portion with standard metric thread is specifically designed for rapid emergency activation, while the second portion with fine thread maintains the stroke limitation setting. This eliminates the need to loosen the lock nut and unscrew the entire pin for emergency operation.
Solution Approach 2:
The cap acts as an intermediary that provides direct access to the first threaded portion of the pin for emergency activation. By removing the cap, the operator can quickly screw the first portion into the actuating member to activate the emergency device without disturbing the second portion that maintains the stroke limitation setting.
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 rapid operation of the manual emergency device and precise, sensitive adjustment of the stroke limitation, reducing time expenditure and maintaining the selected screw-in position under operational conditions.
Implementation Method 1
a slide valve V for high-pressure hydraulics (e.g. mobile hydraulics or forklift technology), the hydraulic components of which are not highlighted in detail, such as a slide piston (not shown), can be linearly adjusted between predetermined end positions by at least one actuating magnet M
Implementation Method 2
a fine thread and lock nut for secure positioning
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The slide valve has a stroke limiting device (A) that is provided with a screw-threaded pin (8) relative to the anchor tube (11). The armature tube with the screw-threaded pin is movably arranged on oriented actuator (23). An anchor (20) is acted upon or be limited in stroke in the armature tube, when using both manual emergency device (H) and the stroke limiting device. The armature tube is provided with a removable cap (6). The screw-threaded pin is screwed in the cap and is removed to expose an access to the actuator with the cap from the armature tube. USE : Multi-position multi-way slide valve used for high-pressure hydraulic system used in truck. ADVANTAGE : The manual emergency device can be operated quickly. The previously selected stroke limit setting is not lost at use of the manual emergency device. DESCRIPTION OF DRAWINGS : The drawing shows a sectional view of the slide valve. 6 : Removable cap 8 : Screw-threaded pin 11 : Anchor tube 20 : Anchor 23 : Oriented actuator A : Stroke limiting device H : Manual emergency device.