Three-way Expansion Indicator
TAG：Boiler Thermal Expansion Displacement Indicator Power Plant Boiler Expansion Indicator Coal Fired Power Plant Pipeline Monitoring Heavy Duty Thermal Expansion Indicator
The Three-way Expansion Indicator is a professional mechanical monitoring device for boiler and high-temperature pipeline systems.It is used to detect and display three-dimensional thermal expansion displacement of boiler headers,steam drum...
The Three-way Expansion Indicator is a professional mechanical monitoring device for boiler and high-temperature pipeline systems.It is used to detect and display three-dimensional thermal expansion displacement of boiler headers,steam drums,main steam pipes and other key components.
During boiler startup,operation and shutdown,high-temperature components will expand and shift horizontally,vertically and axially.This indicator tracks the displacement in real time,helping operators judge whether the thermal expansion is within the designed range.It effectively prevents pipe deformation,weld cracking,stress concentration and leakage caused by limited or abnormal expansion,and guarantees the safe and stable operation of the whole system.
Main Structure
Fixed base and support bracket:High-strength steel,firmly installed on static structures as the reference benchmark.
Three sets of independent dial and pointer:Clear millimeter scales for direct and accurate reading.
Connecting rod&universal joint:Low-friction flexible structure,adapts to multi-direction movement and ensures measurement accuracy.
High-temperature resistant parts:Made of heat-resistant materials,suitable for long-term use in high-temperature boiler environments.
Working Principle
Calibrate all pointers to zero under cold state before commissioning.
As the equipment heats up,pipelines and components produce three-way thermal displacement.
The connecting rod drives the pointers to move synchronously,and the displacement value can be read directly from the dials.
Once the reading exceeds the allowable limit,staff shall conduct inspection and troubleshooting in a timely manner.
Key Advantages
Three-direction synchronous monitoring,full coverage of thermal displacement.
Pure mechanical structure,no power supply needed,stable and reliable performance.
High temperature and vibration resistance,long service life with few wearing parts.
Simple installation,easy observation and daily maintenance.
Application
Widely applied in thermal power plants,industrial high-pressure boilers,petrochemical and central heating systems.Mainly matched with headers,steam drums and large-diameter high-temperature steam pipelines.
