Metering Pump Valve Insert With Integrated Overflow Relief
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Solution Overview
Problem
Existing metering pumps face challenges in managing high pressures with aggressive chemicals, leading to potential overpressures and increased wear, as traditional safety measures require extensive installation and additional components, which are costly and inefficient.
Innovation Solution
A valve insert with an overflow valve integrated into the metering pump's dosing head, positioned between the suction and pressure valves, allows for direct reduction of excess pressure by opening an overflow line when a pressure limit is reached, preventing damage and maintaining the medium within the conveying circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional valve block with bypass valve is installed to relieve overpressure, then overpressure protection is achieved, but installation space and device complexity increase
Solution Approach 1:
The overflow valve is integrated directly into the dosing head, merging the overpressure protection function with the existing pump structure. This eliminates the need for a separate valve block and reduces installation complexity while maintaining reliable overpressure protection.
Solution Approach 2:
The overflow valve is extracted from the external valve block and incorporated directly into the dosing head structure. This extraction simplifies the overall system by removing the need for additional external components and their associated installation requirements.
2Reliability
If a separate valve block is used for pressure relief, then overpressure protection is provided, but initial pressure in the metering head increases causing increased wear
Solution Approach 1:
The overflow valve is positioned locally within the dosing head at the precise location where overpressure occurs. This local placement enables immediate pressure relief at the source, preventing high initial pressure from affecting the metering head and reducing wear on critical components.
Solution Approach 2:
The overflow valve is pre-positioned within the dosing head structure, ready to activate immediately when pressure exceeds the threshold. This preliminary positioning ensures that pressure relief occurs at the optimal moment and location, preventing damage before it can occur.
3Measurement precision
If pressure monitoring with sensors and electronics is implemented, then precise pressure control is achieved, but cost and installation effort increase significantly
Solution Approach 1:
The invention replaces expensive electronic pressure monitoring systems with a simple mechanical overflow valve that uses a spring-loaded diaphragm mechanism. This mechanical solution provides sufficient pressure control without the high cost and complexity of sensors and electronics, effectively using a simpler, more economical component to achieve the required function.
4Reliability
If an external valve block is installed for bypass flow, then overpressure relief is achieved, but installation space requirements increase
Solution Approach 1:
The overflow valve is nested within the existing dosing head structure, utilizing the available internal space. This nesting approach allows the overpressure relief function to be incorporated without requiring additional external installation space, as the valve is housed within the existing pump components.
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 solution effectively reduces critical overpressures directly at the dosing head, minimizing wear and installation complexity by integrating the overflow mechanism within the existing pump structure, thus enhancing safety and operational efficiency.
Implementation Method 1
held in the blocked position by a compression spring
Implementation Method 2
the ball is moved out of the valve seat 8 in the pressure direction into a release position
Data Source
Figure 1
Figure 2
AI summary
It is well known, and increasingly required, to use safety accessories when operating metering pumps with aggressive media and under high pressures. These accessories are intended to prevent excessive pressure in the metering head from causing leaks. One known approach is to integrate a pressure relief valve in a separate fitting into the pressure line to release any excessive pressure. To avoid the costly and complex addition of separate fittings and to address overpressure directly in the metering head rather than in the pressure line, the invention proposes integrating a pressure relief valve into the metering head. This valve connects to or extends the suction valve and directly reduces any critical pressure generated in the metering head via a pressure relief line. This improves the safety of the system while simultaneously reducing the installation space required by the additional valve.