One: Preparation
1: Bottle filling personnel should wear anti-freeze gloves, helmet with face mask, anti-smash shoes and anti-freeze clothing in accordance with regulations;
2: Before filling each shift, first check the \"0\" position of the filling scale;
3: Check the validity period of the calibration of the filling scale and whether the electrostatic grounding wire is well connected;
4: Check whether the filling hose and filling valve are properly sealed.
Two: Fill
1: Place the qualified low-temperature adiabatic gas cylinder in the center of the filling scale, read the weight of the gas cylinder on the scale and record it;
2: Connect the hose connector on the filling branch pipe to the liquid low temperature insulated gas cylinder inlet valve;
3: Weigh again to determine the increased weight due to the nozzle;
4: Set the weight required to be filled on the platform scale according to the specifications of the cryogenic adiabatic cylinder and the maximum allowable filling capacity of the cylinder. The weight of the cylinder after filling shall not be greater than the sum of the marked weight of the cylinder and the maximum filling capacity;
5: Confirm that the pressure valve of the cryogenic adiabatic cylinder is closed, and open the vent valve of the cryogenic adiabatic cylinder;
6: Open the liquid liquid outlet valve of the liquid outlet tank, open the liquid inlet valve of the low-temperature adiabatic gas cylinder successively, and fill the branch pipe valve;
7: During the filling operation, the refiller should closely monitor the pressure of the low-temperature insulated gas cylinder and adjust the blowout valve of the low-temperature insulated gas cylinder so that the pressure difference between the storage tank and the bottle is 0.3MPa. Observe the reading of the platform scale to see whether the weight of the intended liquid gas is reached. When the reading shows that the inflated bottle is close to the weight of the liquid gas to be filled, the filling branch pipe valve should be properly turned down;
8: After the bottle has reached the allowable filling amount, close the liquid phase outlet valve of the liquid outlet tank, the filling branch pipe valve, the liquid inlet valve and the vent valve of the low-temperature insulated gas cylinder in turn;
9: Open the filling branch pipe discharge valve, discharge the residual liquid on the filling liquid inlet hose of the cryogenic insulated gas cylinder, and close the filling branch pipe discharge valve.
Three: End
1: Disassemble the liquid inlet hose;
2: Check whether all the above valves are closed.
3: Fill in the filling record.
First of all, the carbon dioxide cylinder is equipped with a pressure gauge for carbon dioxide, and then the carbon dioxide protection welding host that gas pipe is linked to the table
Carbon dioxide gas welding is DC reverse connection, the ground wire and the workpiece are connected to the negative electrode (-), and the welding gun is connected to the positive electrode ().
Carbon dioxide gas shielded welding techniques (Gas shielded welding techniques)
Carbon dioxide gas welding techniques, influencing factors: gas welding process parameters (welding range) mainly include:
①, welding wire diameter, welding current, arc voltage. ②, welding speed (refer to welding electrode arc welding)
③, the length of the welding wire, gas flow, power supply polarity, etc. The welding current is related to the thickness of the workpiece, the diameter of the wire, the welding position, and the form of the droplet transition:
1, usually diameter of 0.8-1.6mm welding wire.
2, short circuit transition welding current within 50-230A selection.
3. The welding current is selected within 250-500A during the coarse drop transition.