Negative pressure continuous casting device for continuous casting by using negative pressure

The utility model discloses a negative pressure continuous casting device utilizing negative pressure for continuous casting, and particularly relates to the field of continuous casting, which comprises an intermediate tank, the bottom of the intermediate tank is communicated with a water gap, the bottom of the water gap is communicated with a crystallizer, the bottom of the crystallizer is fixedly provided with a dummy ingot track, and the top of the intermediate tank is communicated with a negative pressure mechanism. A foaming mechanism is rotatably mounted in the intermediate tank, and a control valve is fixedly mounted at the communication part of the intermediate tank and the water gap; the foaming mechanism comprises a sealing plate fixedly mounted at the top of the intermediate tank, a through hole is formed in the middle of the sealing plate, a stirring rod is rotatably mounted on the inner wall of the through hole and penetrates through the through hole formed in the middle of the sealing plate, a f