Gas detonation spraying equipment can be divided into several types, and what are the characteristics of each

       According to the different timing control methods of the spraying process such as "filling-air cushion protection-deflagration-sweeping", different gas detonation spraying equipment can be divided into two basic types: one is multi-cam, multi-valve gas detonation spraying equipment, through the cam Control the opening and closing of the valve, so as to realize the sequential control of the spraying process. In 1955, the United Carbon Compound Company owned the patent right of this equipment; The coordination of the cylinder feeding controls the spraying process. In 1969, the Institute of Materials Science of the Ukrainian Academy of Sciences developed this type of spraying equipment, and it has been patented in the United States, Europe, Japan and other countries and regions.



    There is also a type of deflagration spraying equipment that uses a non-explosive gas mixture. Both C2H2-O2 and H2-O2 gas mixtures are explosive gas mixtures, but the risk of backfire is high; from the perspective of safety and economy, it is desirable to use combustible gas mixtures with low tempering tendency, such as liquefied petroleum gas + O2, natural gas + O2, propylene gas + O2, etc.; but this type of gas mixture is a non-explosive gas mixture, and the process from combustion to explosion is much longer than that of C2H2-O2 and H2-O2 mixtures. This type of deflagration spraying equipment was developed taking into account the characteristics of refractory gas mixtures. Currently, the most successful equipment used is the "Demeton" equipment developed and finalized by the Ukrainian Institute of Materials Science. The equipment uses a mixture of non-explosive gas + O2 as the working gas, no buffer gas is required, and wearing parts are excluded, thus improving the reliability and stability of the equipment.