Supporting and tight ejecting device of double-roller thin strip continuous casting side sealing plates and application method of supporting and tight ejecting device of double-roller thin strip continuous casting side sealing plates

The invention discloses a supporting and tight ejecting device of double-roller thin strip continuous casting side sealing plates and an application method of the supporting and tight ejecting deviceof the double-roller thin strip continuous casting side sealing plates, and is used for improving the operation stability of the double-roller thin strip continuous casting side sealing plates. A tight ejecting mechanism and an anti-returning mechanism are arranged on the rear surface of each double-roller thin strip continuous casting side sealing plate supporting device; each tight ejecting mechanism comprises a pushing rod and a linear driving element driving the pushing rod; and each anti-returning mechanism comprises a positioning pin and a linear driving element driving the positioning pin. The method includes the steps that before the casting operation of thin strip continuous casting is conducted, the side sealing plates are tightly attached to the end faces of casting rollers at acertain pressure under th