Proportional Metering Pump Nozzle Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing assembly method of proportional metering pumps is prone to handling errors and unintentional unscrewing, leading to loss of main liquid and risk of secondary liquid leakage, causing pollution.
Innovation Solution
A proportional metering pump design featuring a fixing ring and blocking ring mechanism that securely locks the suction nozzle to the hydraulic machine's access nozzle using a multi-start threading or bayonet configuration, preventing unscrewing with a secure locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ring is directly screwed onto the threading of the inlet, then the assembly is simple and quick, but the connection is prone to handling errors and unintentional unscrewing
Solution Approach 1:
The connection system is divided into multiple functional components: a fixing ring with threading for attachment to the inlet, and a blocking ring with a locking mechanism. This segmentation allows the assembly to maintain simplicity while adding a dedicated locking function to prevent unintentional unscrewing.
Solution Approach 2:
The blocking ring is designed to be positioned and locked into place before final tightening of the fixing ring. This preliminary action of engaging the blocking ring's locking mechanism ensures that the connection is secured against unintentional unscrewing before full assembly pressure is applied.
2Device complexity
If the ring is directly screwed onto the threading, then the device structure is simple, but liquid leakage and pollution can occur
Solution Approach 1:
The connection mechanism is segmented into a fixing ring for attachment and a blocking ring for sealing and locking. This segmentation allows the blocking ring to specifically address leakage prevention through its sealing surface and locking tabs, while keeping the overall device structure relatively simple.
Solution Approach 2:
The blocking ring acts as an intermediary element between the fixing ring and the inlet threading. It provides both sealing contact to prevent liquid leakage and mechanical locking through its tabs, thereby preventing pollution without significantly complicating the device structure.
3Reliability
If a locking mechanism is added to prevent unscrewing, then connection reliability improves, but device complexity increases
Solution Approach 1:
The locking function is segregated into a separate blocking ring component rather than being integrated into the fixing ring. This segmentation allows the locking mechanism to be added while keeping the fixing ring design relatively simple and maintaining ease of assembly.
Solution Approach 2:
Instead of designing a complex locking mechanism that actively secures the connection, the blocking ring uses a passive locking approach where locking tabs simply engage with corresponding features on the inlet. This inverted approach provides reliable locking with minimal added 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
The solution effectively prevents involuntary separation of the suction nozzle from the hydraulic machine, reducing liquid loss and leakage, thereby minimizing site pollution and ensuring reliable operation.
Implementation Method 1
the first end of said ring being pressed toward the metering mechanism against a shoulder formed on said access nozzle by means of a spring
Data Source
AI summary
A proportional metering pump includes a hydraulic machine, a metering mechanism provided with a nozzle, and a unit for attaching the nozzle to the pipe for access to the cavity inside the hydraulic machine, including a securing ring mounted in rotation about one of the ends of the nozzle, a locking ring mounted so as to be able to translate along the longitudinal axis around the pipe for access to the mixing chamber and is pressed, in the direction of the metering mechanism, against a shoulder created on the access pipe by a spring, the securing ring and the pipe being able to engage following a screw connection at the end of which they are secured in rotation so as to prevent unscrewing of the securing ring. Also disclosed is a method for assembling and disassembling a metering mechanism on a hydraulic machine of such a pump.