Negative pressure cover and sealing tank with same

• Main Authors: LIANG AIMEI, SHI HONGLI, HUANG JINGJING, ZOU SHIPING, JIANG SHILONG, ZHANG YONGJIU, LU SIYU, XIE QINGGANG, LENG YOUBIN, REN YANLING
• Format: Patent
• Language: Chinese; English
• Published: 02.12.2022
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

The invention provides a negative pressure cover and a sealing tank with the negative pressure cover, the negative pressure cover comprises a shielding cover, a sealing cover and a pushing assembly, the shielding cover comprises a fixed cover and a movable cover, the movable cover is arranged above the fixed cover, and the movable cover has a floating position and a pressing position relative to the fixed cover; the sealing cover is arranged in the fixed cover, the sealing cover is provided with a sealing plate, the inner side wall of the fixed cover is provided with a step structure, the outer edge of the sealing plate abuts against the lower surface of the step structure, an inner cavity of the fixed cover is divided into a first inner cavity and a second inner cavity by the sealing cover, and a negative pressure valve capable of communicating the first inner cavity with the second inner cavity is arranged on the sealing cover; in the process that the movable cover moves downwards from the upward floating p