Explosion-Proof Connector for Canned Motor Pump Leakage Detection
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Solution Overview
Problem
Conventional pressure switches in canned motor pumps struggle to accurately detect small amounts of liquid leakage, leading to potential insulation failure and increased costs due to the need for replacing terminal flanges with different sensors.
Innovation Solution
A pressure-resistant explosion-proof connector that allows for the mounting of various sensors via a common connector, featuring a connection cylinder with a through hole and cylindrical body forming an explosion-proof gap, and a base joint connecting the cylinder to the sealed space, enabling detection of pressure changes and reducing the need for specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pressure switches are used in canned motor pumps, then the structure is simple, but the measurement precision for detecting small liquid leakage is insufficient
Solution Approach 1:
The connector is divided into distinct functional segments: a connection cylinder for mechanical connection, a cylindrical body forming an explosion-proof gap, and a base joint for mounting. This segmentation allows each component to be optimized for its specific function while maintaining overall simplicity.
Solution Approach 2:
The connector is designed as a universal interface that can accommodate various types of sensors (pressure sensors, gas sensors, temperature sensors) through a standardized mounting structure. The base joint and connection cylinder provide a common platform for different sensor types, eliminating the need for specialized connectors for each sensor.
2Measurement precision
If terminal flanges are replaced with different sensors, then measurement accuracy improves, but manufacturing cost increases
Solution Approach 1:
The connector serves as a universal interface that can accommodate various types of sensors (pressure sensors, gas sensors, temperature sensors) through a standardized mounting structure. The base joint and connection cylinder provide a common platform for different sensor types, eliminating the need for specialized connectors for each sensor and reducing manufacturing costs.
Solution Approach 2:
The connector design allows for parameter changes in sensor types while maintaining a constant interface structure. By keeping the connector geometry and mounting mechanism unchanged, the system can accommodate different sensor parameters (pressure, gas composition, temperature) without increasing manufacturing complexity or cost.
3Object-affected harmful factors
If intrinsic safety explosion-proof structure is used, then explosion risk is reduced, but current flow capability is limited
Solution Approach 1:
The connector acts as an intermediary structure that allows electrical connections to pass through the explosion-proof barrier. The connection cylinder and base joint provide a controlled pathway for electrical conductors, enabling current flow while maintaining the explosion-proof integrity of the sealed space through the explosion-proof gap design.
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
Enables accurate detection of small liquid leaks and damage to the can, reducing costs by allowing different sensors to be used with a common connector, ensuring reliable operation in explosive atmospheres without the need for frequent replacements.
Implementation Method 1
a cylindrical body mounted to the through hole of the connection cylinder to form a gap and a width of an explosion-proof gap
Implementation Method 2
a base joint that connects the connection cylinder to the sealed space
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A pressure-resistant explosion-proof connector that allows even a different type of sensor to be mounted via a common connector, and thereby eliminates the need for replacement of each sensor is provided. A canned motor pump 10 includes a centrifugal pump 11, a stand 12 that supports a body, a motor 13, a bearing holder 14 of the motor 13, a terminal flange 15 mounted to an outer cylinder of the motor 13, a terminal box 16 mounted onto the terminal flange 15, a motor monitoring unit 17 mounted onto the terminal box 16, and a pressure-resistant explosion-proof connector 20 mounted to the terminal flange 15. Also, the pressure-resistant explosion-proof connector 20 includes a base joint 21 mounted to the terminal flange 15, and a connection cylinder 22 connected to the base joint 21, and a pressure sensor 23 is connected to the distal end of the connection cylinder 22.