Daily maintenance of customized box type resistance atmosphere furnace

As a precision experimental and production equipment, the daily maintenance of customized box type resistance atmosphere furnaces directly affects the equipment’s lifespan, operational stability, and experimental/production quality. The following is a systematic summary of maintenance points from four dimensions: cleaning and maintenance, component inspection, safety protection, and record management:

1. Cleaning and maintenance
Furnace cleaning
Frequency: Clean after each use and thoroughly clean before long-term disuse.
method:
Use a vacuum cleaner or soft bristled brush to remove residues (such as oxide scale, powder, etc.) from the furnace.
Stubborn stains can be wiped with a damp cloth dipped in neutral detergent, avoiding the use of metal tools to scrape the inner wall of the furnace (to prevent damage to refractory materials).
After cleaning, thoroughly dry to prevent residual moisture from damaging the furnace at high temperatures.
Cleaning of sealing components
Furnace door sealing ring: Regularly wipe with a soft cloth to remove dust or oil stains and ensure sealing.
Observation window: Wipe with glass cleaner to maintain transparency and facilitate observation of the situation inside the furnace.
external cleaning
Wipe the surface of the furnace body with a dry cloth to prevent water or corrosive liquids from contacting the control panel and electrical components.

2. Component inspection and maintenance
Heating element inspection
Frequency: Check once a month, and shorten the cycle after long-term high load use.
Content:
Observe whether the resistance wire turns red uniformly, and whether there is any fracture, deformation, or oxidation phenomenon.
Replace any abnormalities promptly to avoid safety accidents caused by local overheating.
Thermocouples and Temperature Control Systems
Calibration: Calibrate thermocouples with standard thermometers every quarter to ensure temperature control accuracy (error ≤ ± 1 ℃).
Connection check: Check if the connection between the thermocouple and the temperature controller is loose to avoid abnormal signal transmission.
Gas system inspection
Pipelines and valves:
Check whether the gas pipeline is aging or leaking (soap water can be applied to the interface for detection).
Whether the valve operation is flexible and the sealing is good.
Flow meter: Regularly calibrated to ensure accurate gas flow.
Fan and circulation system
Operation inspection: Start the fan and listen for any abnormal noise or vibration.
Filter cleaning: Clean the inlet filter of the fan every month to prevent dust from clogging and affecting the circulation efficiency.
Electrical system inspection
Wiring terminals: Tighten all wiring terminals to prevent loosening and poor contact.
Insulation performance: Use a megohmmeter to test the electrical insulation resistance and ensure it is ≥ 1M Ω (safety standard).

3. Security protection
Grounding inspection
Check the grounding wire for firmness every month, with a grounding resistance of ≤ 4 Ω (in compliance with electrical safety regulations).
Leakage protection
Test the leakage protection switch to ensure sensitive operation (power should be cut off immediately after pressing the test button).
Gas leakage protection
Install combustible gas alarms near the furnace body and regularly test their sensitivity.
Equip the operating area with fire extinguishers (dry powder or carbon dioxide type) and ensure that the operators are familiar with the usage methods.
over temperature protection
Test the over temperature alarm device to ensure that the power can be automatically cut off when the temperature exceeds the set value.

4. Record management
Maintenance records
Establish an Equipment Maintenance Ledger to record the time, content, replacement of parts, and maintenance personnel for each maintenance.
Operation records
Record equipment operating parameters (such as temperature, atmosphere flow rate, heating time, etc.) for easy traceability of issues.
Fault record
Detailed recording of fault phenomena, handling processes, and results, providing reference for subsequent maintenance.

5. Discontinuation and long-term storage
Pre processing before discontinuation
Clean the furnace, close the gas valve, and exhaust the residual gas in the pipeline.
Cut off the power and cover the equipment with a dust cover.
Long term storage
Perform no-load operation once every 3 months (temperature ≤ 200 ℃) to prevent components from getting damp and aging.
The storage environment should be dry, ventilated, and avoid corrosive gases.

Summarize
The daily maintenance of customized box type resistance atmosphere furnaces should follow the principle of “prevention first, regular maintenance”. Through standardized cleaning, inspection, safety protection, and record management, the equipment failure rate can be significantly reduced, the service life can be extended, and the stability and safety of the experimental/production process can be ensured. Suggest developing a detailed Equipment Maintenance Manual and training operators to strictly follow it.