Adjustable Cut-in Pressure Pump Control via Electronic Switch
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Solution Overview
Problem
Existing water distribution pump control systems are inflexible, as they are set with a single predetermined cut-in pressure value, which may not adapt to varying pressure conditions, leading to improper pump start-up or shut-down in systems with changing pressure values.
Innovation Solution
An electronic pressure and flow switch system that allows users to select from multiple preset cut-in pressure values, using a magnet-reed system with adjustable magnetic fields generated by coils to modify the sensitivity of the reed contact, enabling the pump to start or stop based on user-defined pressure thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single predetermined cut-in pressure value is set in the factory, then the apparatus structure is simple and manufacturing is easy, but the apparatus cannot adapt to varying pressure conditions in different water distribution systems
Solution Approach 1:
The patent implements dynamic adjustability of the cut-in pressure value through electronic means. A microprocessor-based control system allows the cut-in pressure to be modified after manufacturing, transforming the previously fixed parameter into a dynamic one that can adapt to different water distribution system requirements. This resolves the contradiction by enabling adaptability without requiring multiple different apparatus designs.
Solution Approach 2:
The patent changes the cut-in pressure parameter from a fixed factory-set value to an adjustable parameter. Through electronic control means including a microprocessor and interface, users can modify the cut-in pressure value to match specific system requirements. This parameter change approach allows the same apparatus structure to serve multiple applications with different pressure requirements.
2Adaptability or versatility
If the cut-in pressure value is fixed in the factory, then manufacturing precision is easier to maintain, but the apparatus cannot meet requirements when system pressure values differ from design values
Solution Approach 1:
The patent replaces the mechanical adjustment mechanism with an electronic control system. Instead of physically adjusting mechanical components to change the cut-in pressure, the system uses electronic sensing and microprocessor-based control to detect pressure conditions and trigger pump operation. This substitution maintains manufacturing precision while enabling flexibility through software-based parameter adjustment.
3Reliability
If apparatus with different cut-in pressure values are manufactured for different systems, then each system gets optimal performance, but device complexity and inventory requirements increase
Solution Approach 1:
The patent creates a universal apparatus design that can function reliably across multiple different water distribution systems. By incorporating an adjustable cut-in pressure feature, a single apparatus model can be configured to meet the specific requirements of different systems, eliminating the need for multiple specialized models. This universal design maintains reliability while reducing device variety.
Solution Approach 2:
The patent enables the apparatus to be self-configured to match system requirements. Through user-accessible interface means, operators can independently adjust the cut-in pressure value to optimize performance for their specific water distribution system without requiring custom manufacturing or complex installation procedures. This self-service capability ensures reliability while simplifying deployment.
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 system provides flexible control over pump operation by allowing users to choose the appropriate cut-in pressure value, ensuring accurate start-up and shut-down based on current hydraulic system conditions, reducing the need for replacement and improving system reliability.
Implementation Method 1
The stem is provided with a magnet to generate a magnetic field. The body with the chamber has a compartment separated from the chamber on the bottom thereof. The control electronics of the apparatus are arranged in this compartment. These electronics comprise a reed device adapted to interact with the magnet of the stem
Implementation Method 2
The pressure switch is formed by a stem fixed to an elastic membrane and associated with a spring. The pressure of the water in the chamber presses on the membrane overcoming the force of the spring and causing the stem to take a balanced position
Implementation Method 3
a coil arranged on the circuit board and adapted to generate a magnetic field around the reed contact
Data Source
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AI summary
Apparatus for controlling start-up and shut-down of a pump of a water distribution network, comprising: - a chamber (12) provided with an inlet (13) which can be operatively associated with the delivery side of a pump and an outlet (14) operatively connected to the water network, - a system (18) for detecting and/or measuring the flow of water through said outlet (14) adapted to emit a start-up signal for the pump upon reaching a preset flow threshold value, - a device (21) for detecting and/or measuring the pressure in said chamber (12) adapted to emit a start-up signal for the pump of the network upon reaching a preset value defined "cut-in pressure", - electronic means (17) for controlling and managing operation of the device. The distinctive feature of the invention resides in the fact that it comprises a plurality of preset cut-in pressure values stored in said electronic control and management means, and interface means (Q) available to the user to select one of the preset cut-in pressure values of said plurality.