Connect the working gas circuit and Tube furnace The air outlet of the is connected to the mechanical pump. After opening the inlet valve of the tubular furnace, remember to turn off the power supply of the vacuum pump and open the exhaust valve. Note: hold the flange to avoid the air pipe and vacuum corundum tube. When the oven vacuum reaches - 0.1 (when the pointer reaches the end point), close the exhaust valve and close the inlet valve operation.
Turn the knob anticlockwise to open the main valve of the cylinder, turn the knob clockwise, and then slowly open the outlet pressure relief valve to make the outlet pressure reach 0.004mpa (2 small batteries), turn the knob anticlockwise and slowly open the pipe. Furnace inlet valve: pay close attention to the pressure gauge of tubular furnace and confirm that the air pressure is lower than 0.08mpa (if the air pressure is higher than 0.08mpa, open the outlet valve of tubular furnace to vent gas). These two processes need to be repeated.
When the barometer is relatively stable, the pressure is relatively stable. If you want to close the inlet valve of the tubular furnace, open the outlet valve, empty it to - 0.1, close the mechanical pump of the furnace outlet valve, open the inlet valve of the tubular furnace, and then perform other steps.
Oven is a kind of high temperature equipment which is closely related to fuel, gas and electricity. It is easy to cause fire, electric shock, explosion, combustion, poisoning and other accidents. Therefore, the tubular furnace is more concerned than the traditional processing equipment.
Generally speaking, the high temperature during the operation of the oven is easy to burn. When in contact with water, high temperature molten metal will explode. Gas and controlled atmosphere are also easy to produce explosive gas, and the oil pipeline, oil tank and oil depot are flammable and explosive. If used improperly, the facilities will explode and be poisoned; if the furnace safety protection device fails, electric shock will occur after contact. If the situation is serious, it will cause poisoning.
The furnace is difficult to maintain. There are a lot of repairs in the stove. The space is very crowded with insufficient natural lighting and poor ventilation. Workers are exposed not only to dust, but also to high temperatures, fumes, toxic gases and chemicals. Some furnaces are very high and the furnace body is very narrow in the field. Maintenance work is high altitude three-dimensional intersection and multi-layer operation, which is very dangerous. Therefore, in the operation and maintenance of tube furnace or organization of tube furnace, we should seriously consider the safety issues. Especially in the repair or hot repair of tubular furnace, please pay attention to the accidents caused by these unsafe factors.