Study on the Fan Layout Method of SF6 Leakage in Confined Space

When SF6 gas insulation equipment is in operation, if there is a sudden leakage fault, especially SF6 gas leakage in a closed space such as a transmission pipe gallery, underground substation, and indoor substation, The leaked SF6 will endanger the life and health of operation and maintenance personnel and pollute the environment, and it will mix with the air in the environment, which increases the difficulty of recovery. In order to solve the problem of leaking gas in space, different arrangements of exhaust pipes and fans are tested. The results show that the SF6 gas concentration in the confined space can be effectively reduced by using the arrangement of a small flow fan to supply air into the pipeline and large flow fan output in the front stage; At the same time, appropriate tee form and SF6 concentration sensor layout are selected to optimize the test model further.