Removable Pump Pressure Sensor Housing for Flood-Safe Maintenance

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Solution Overview

Problem

Existing pressure sensing devices in electric pumps are prone to obstruction by dirt and debris, requiring frequent maintenance that disrupts the system and poses flooding risks during sensor removal.

Innovation Solution

A pressure sensing device with a housing structure featuring a base and insulating shell protects the sensor from water and debris, and includes hydraulic connections with flow interruption means to prevent flooding during maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the pressure sensor is placed inside the pump casing for insulation protection, then IPX5 protection is maintained, but the sensor becomes prone to obstructions from dirt and debris

Engineering Contradiction:

Improveprotection degreeVSAvoidobstruction by dirt and debris

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The housing structure is divided into an inner base that houses the sensor and an outer insulating shell that provides protection. This segmentation allows the sensor to be protected from water jets while the insulating shell can be designed with protective features against dirt and debris obstruction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The insulating shell acts as an intermediary between the sensor and the external environment. It provides IPX5 protection while potentially incorporating design features that prevent dirt and debris from reaching the sensor, thus mediating the harmful effects.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of repair

If maintenance is performed on the sensor inside the pump, then the sensor can be cleaned or replaced, but the entire pump must be intervened upon and the system isolated

Engineering Contradiction:

Improvesensor maintenanceVSAvoidsystem isolation requirement

Core Design Contradiction:

Ease of repairVSDevice complexity

Solution Approach 1:

The housing structure is designed as a removable unit that can be separated from the pump. This allows maintenance personnel to access and service the sensor by removing only the housing structure rather than disassembling the entire pump, simplifying the maintenance process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The housing structure includes pre-integrated flow interruption means (taps) that can be closed before sensor removal. This preliminary action prevents water flow and potential flooding before the actual maintenance begins, making the maintenance process safer and easier.

Inventive Principle:

Principle #10Preliminary action

3Ease of repair

If the sensor is removed for maintenance, then the sensor can be serviced, but water may flow from emptying pipes and flood the room

Engineering Contradiction:

Improvesensor accessibilityVSAvoidflooding risk

Core Design Contradiction:

Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The housing structure is equipped with flow interruption means (taps) that can be closed before the sensor is removed. This preliminary action stops water flow in advance, preventing flooding when the sensor is accessed for maintenance.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The integrated flow interruption means act as a protective measure in place before maintenance begins. By having these controls ready and accessible on the housing structure itself, the system is prepared to prevent flooding before the hazard can occur.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Reliability

If the insulating shell is made rigid for protection, then IPX5 protection is ensured, but the shell may collapse on itself during assembly

Engineering Contradiction:

Improveprotection integrityVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The insulating shell is designed with flexible properties that allow it to be easily assembled over the base without collapsing. The flexibility enables the shell to conform during assembly while maintaining sufficient rigidity to provide IPX5 protection when properly installed.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The shell uses friction from projecting elements to achieve adequate holding force without requiring excessive rigidity. This partial action approach allows the shell to be flexible enough for easy assembly while providing sufficient protection when assembled.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4411143B1Pressure sensing device suitable for an electric pump and electric pump equipped with it

Publication Date: 2026.04.15 DAB PUMPS SPA

Figure 1~2
Figure 3~4

AI summary

The invention concerns a pressure sensing device (100) adapted to be mounted on a pump (30). Advantageously, this device comprises: - a pressure sensor (10), - a removable housing structure (11) for housing the pressure sensor (10) equipped with a base (12) and an insulating shell (13), the pressure sensor (10) being housed inside the base (12) and the insulating shell being placed on the base (12) so as to prevent dust and water jets from reaching the sensor (10).