Temperature-Driven Gas Density Relay Checking Without Disassembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for checking SF6 gas density relays in the field require either the installation of a valve between the relay and electrical equipment, which degrades seismic performance, or disassembly, leading to gas leakage, and there is a lack of devices that can perform checks without these modifications.
Innovation Solution
A gas density relay check device comprising a temperature adjusting mechanism, pressure sensors, temperature sensors, a computer data processing system, and a contact signal sampling unit, which allows for contact action simulation and gas density value acquisition without the need for additional valves or disassembly, using a temperature adjusting mechanism to enable contact actions and a computer system to process sensor data for accurate checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a valve is installed between the density relay and electrical equipment to enable pressure adjustment for checking, then the density relay can have contact action for checking, but the seismic performance of the density relay degrades
Solution Approach 1:
The checking device is segmented into independent functional modules: temperature adjusting mechanism, pressure sensor, temperature sensor, computer data processing system, and contact signal sampling unit. This allows the checking function to be separated from the density relay itself, enabling checking without installing valves that would degrade seismic performance.
Solution Approach 2:
The temperature adjusting mechanism acts as an intermediary to indirectly induce contact action in the density relay by changing temperature, which in turn changes gas density. This mediator approach allows checking without direct mechanical intervention that would compromise seismic performance.
2Ease of operation
If a density relay check valve is additionally installed to enable checking, then checking can be performed, but additional installation is impossible for most equipment and leads to degradation of seismic performance
Solution Approach 1:
The checking device is designed as a universal multi-functional instrument that can check density relays without requiring any additional installation on the equipment. It integrates temperature adjustment, sensing, data processing, and contact signal sampling into one portable device that adapts to different checking scenarios.
Solution Approach 2:
The checking function is extracted from the equipment installation and embodied in a separate portable checking device. This extraction eliminates the need for additional valve installation on the equipment, reducing installation complexity while maintaining checking capability.
3Ease of repair
If the density relay is disassembled to enable checking, then internal components can be inspected, but serious gas leakage may occur caused by improper operation
Solution Approach 1:
The mechanical disassembly approach is replaced with a non-intrusive checking method using sensors and temperature adjustment. The checking device uses pressure sensors, temperature sensors, and contact signal sampling to inspect the density relay's functionality without mechanical disassembly, eliminating gas leakage risks.
Solution Approach 2:
The density relay performs self-inspection through its own contact signals and physical responses to temperature changes. The checking device captures these self-generated signals, allowing the relay to be inspected without external intervention that would require disassembly and risk gas leakage.
4Measurement precision
If commercial density relay check devices are used that adjust gas pressure for contact action, then contact signal operating value can be detected, but these devices require additional valve installation that is impossible for most equipment
Solution Approach 1:
Instead of changing gas pressure directly, the invention changes temperature as the controlling parameter. The temperature adjusting mechanism induces density changes in the gas, which triggers contact action in the density relay. This parameter substitution maintains measurement precision while eliminating installation requirements.
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 checking of gas density relays without disassembly or additional valve installation, ensuring reliable operation and compliance with environmental protection regulations by simulating contact actions and obtaining accurate gas density values, thus addressing the limitations of existing methods.
Implementation Method 1
the temperature adjusting mechanism is configured to adjust temperature rise and fall of a temperature compensation element of a gas density relay, to enable the gas density relay to have a contact action
Implementation Method 2
a gas density value is obtained according to a pressure value and a temperature value in the contact action
Implementation Method 3
a gas density value is obtained according to a pressure value and a temperature value in the contact action
Data Source
AI summary
A gas density relay check device and a check method thereof are provided. In check, a temperature adjusting mechanism and a gas density relay are relatively set. Temperature rise and fall of a temperature compensation element of the gas density relay is adjusted through the temperature adjusting mechanism, then the gas density relay is enabled to have a contact signal action. A gas density value is obtained according to the pressure value and the temperature value in the contact action. A contact signal operating value of the gas density relay is detected to check on the contact signal operating value of the gas density relay. The gas density relay check device of the present disclosure is capable of accurately checking gas density relays, and is particularly applicable to a gas density relay without a three-way valve, and check can be achieved without disassembling the gas density relay.