Centrifugal Pump Scale Remover and Air Venting
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Solution Overview
Problem
Centrifugal electric pump assemblies in heating systems face issues with scale formation and jamming due to air entry and non-use during maintenance, leading to deposits between moving and fixed parts, which can cause operational failures.
Innovation Solution
Incorporation of a scale remover substance, such as polyphosphates, in solid or liquid form, positioned near the moving and fixed parts, and a plug design with a tubular shape and ball valve for automatic air venting to prevent scale formation and deposits, ensuring the pump remains operational even after long periods of inactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pump is left inactive during maintenance periods, then maintenance can be performed, but scale forms and deposits generate between moving and fixed parts causing shaft jamming
Solution Approach 1:
The patent introduces a scale remover substance (tablet or granulate) that is pre-positioned in the pump assembly to act before scale can form during maintenance periods. This preliminary protective action prevents the harmful effect of scale accumulation when the pump is inactive, resolving the contradiction between maintenance accessibility and shaft operability.
Solution Approach 2:
The scale remover substance acts as an intermediary between the water and the mechanical parts (shaft, bushings, impeller). It chemically interacts with scale-forming minerals in the water to prevent them from depositing on moving and fixed parts, thereby protecting the shaft mechanism during inactive periods while allowing maintenance to proceed.
2Ease of operation
If air enters the system during maintenance, then the system can be drained and refilled, but scale formation is accelerated and deposits form between mechanical parts
Solution Approach 1:
The scale remover substance serves as a chemical intermediary that neutralizes the harmful effect of air exposure during maintenance. Even when air enters the system and accelerates scale formation, the substance chemically prevents scale and deposits from forming on mechanical parts, allowing easy maintenance operations without compromising component integrity.
Solution Approach 2:
The pump assembly is equipped with self-protecting capabilities through the included scale remover substance. The substance automatically dissolves and acts during maintenance periods without requiring external intervention, enabling the system to protect itself against scale and deposits even when air enters during draining and refilling operations.
3Reliability
If the pump operates continuously without maintenance, then operational reliability is maintained, but maintenance cannot be performed to replace components
Solution Approach 1:
The scale remover substance is pre-installed in the pump assembly to protect components during any inactive periods, whether for continuous operation or maintenance. This preliminary protection ensures that even when the pump is drained and components are replaced, the remaining parts are protected from scale formation, enabling easy maintenance while maintaining overall reliability.
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 scale formation and deposits, ensuring the pump's reliability and preventing shaft jamming, maintaining functionality even after maintenance and extended non-use, thus enhancing the pump's performance and longevity.
Implementation Method 1
The pump assembly comprises a scale remover substance which is adapted to prevent the forming of scale
Implementation Method 2
a ball valve (161) movable inside said seat (160) from a first active position, in contact with the tablet (150), to a second inactive position
Implementation Method 3
A ball valve (161) movable inside said seat (160) from a first active position, in contact with the tablet (150), to a second inactive position, at the end of the seat (160) proximate to the intermediate element (141)
Data Source
Figure 1
Figure 2
AI summary
A centrifugal electric pump assembly (10), comprising a wet section (1), which comprises inside it a liquid and/or solid scale remover substance in a position that at least potentially communicates with the wet section (1).