High-speed grounding switch with air cylinder and use method of high-speed grounding switch

The invention relates to a high-speed grounding switch with a cylinder and a use method thereof, the high-speed grounding switch comprises a switch mechanism, a shell, a moving contact assembly and a static contact assembly, the moving contact assembly comprises a moving support and an air cylinder, the outer ring of the moving support is sleeved with the air cylinder in a sealed mode, the lower end of the air cylinder is closed through a transition joint, and a transition cavity is formed in the transition joint; the lower end of the transition joint is fixedly connected with a tubular moving contact, the inner ring of the moving contact is communicated with the transition cavity, the switching mechanism drives the transition joint to slide up and down through the connecting rod, an air blowing cavity is formed between the connecting rod and the air cylinder, and the transition joint is provided with a joint hole communicated with the air blowing cavity and the transition cavity. According to the high-capaci