Submersible Pump Inlet Structure for Low-Water Suction
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Solution Overview
Problem
Submersible pumps with non-adjustable water inlets face inefficiencies at low water levels due to gas-liquid mixture intake, leading to decreased suction force and flow velocity, preventing complete liquid extraction.
Innovation Solution
A submersible pump design featuring an isolation plate that adjusts the water inlet area based on fluid impact, allowing automatic adaptation to varying water levels and flow velocities, using either flexible or rigid materials to facilitate this adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the water inlet area is made larger for broader applicability, then the water suction efficiency is improved under normal conditions, but the minimum water suction level becomes too high causing gas-liquid mixture intake at low water levels
Solution Approach 1:
The patent applies the dynamics principle by making the water inlet area adjustable rather than fixed. The isolation plate can move between a first position (blocking the second water inlet, smaller inlet area) and a second position (unblocking the second water inlet, larger inlet area). This dynamic adjustment allows the system to adapt to different water levels, resolving the contradiction between having a large inlet for normal efficiency and a small inlet for low-level reliability.
2Quantity of substance
If the water inlet area is made larger, then liquid can be drawn quickly in large quantities, but the pump fails to completely pump out liquid at low water levels due to gas-liquid mixture intake
Solution Approach 1:
The isolation plate enables dynamic adjustment of the water inlet area based on operating conditions. At low water levels, the isolation plate moves to block the second water inlet, reducing the inlet area to prevent gas-liquid mixture intake and ensuring complete liquid extraction. At normal water levels, the isolation plate unblocks the second water inlet, increasing the inlet area to maximize liquid intake quantity and productivity.
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
Enhances the pump's ability to draw liquid efficiently at different water levels by minimizing gas-liquid mixture entry and maintaining suction force, ensuring complete liquid extraction even at low levels.
Implementation Method 1
the isolation plate is able to be pushed by a high-speed fluid so as to change a size of a water inlet area of the water inlet
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A submersible pump (1), including a water suction assembly (11) and a housing assembly (12), where the water suction assembly (11) is disposed inside the housing assembly (12); the water suction assembly (11) includes an impeller and a motor; the housing assembly (12) is provided with a water inlet and a water outlet (14); the housing assembly (12) comprises a base (121); the base (121) is provided with a first water inlet (1213) and a second water inlet (1214); the submersible pump (1) further comprises an isolation plate (13); the isolation plate (13) is disposed on the housing assembly (12); the isolation plate (13) is configured to block at least a part of the second water inlet (1214); and the isolation plate (13) is able to be pushed by a high-speed fluid so as to change a size of a water inlet area of the second water inlet (1214). The submersible pump can automatically adjust a size of the water inlet area of the water inlet according to the water level so as to efficiently draw in an external liquid at various water levels.