Vacuuming and nitrogen inflating device for sealed packaging box

Abstract

The invention discloses a vacuuming and nitrogen inflating device for a sealed packaging box. The vacuuming and nitrogen inflating device solves the problems that an existing vacuuming and nitrogen inflating device for a sealed packaging box is complex in structure and complicated in operation process. The vacuuming and nitrogen inflating device comprises a vacuuming valve body (2) which is fixedly arranged on a packaging box body (1); a lower valve body cavity (3) and an upper valve body cavity (9) are communicated and formed in the vacuuming valve body (2); a ventilation hole (4) communicated with the interior of the sealed packaging box is formed in the wall of the lower valve body cavity (3); a plunger piston (5) is arranged in the lower valve body cavity (3); a compressed spring (6) is arranged between the bottom end face of the plunger piston (5) and the bottom surface of the lower valve body cavity (3); a sealing pad (7) is connected to the top end face of the plunger piston (5) by a sealing pad pressing-connecting bolt (8) in a pressed mode; external threads at one end of a vacuuming tube (10) and internal threads (11) arranged at the port of the top of the upper valve body cavity (9) are connected together. The vacuuming and nitrogen inflating device has the advantages of being simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to a device for evacuating a fully sealed packing box and filling the box with nitrogen, which belongs to a transfer mechanism for vacuuming and filling a sealed packing box. Background technique [0002] At present, in the design field of fully sealed packaging boxes, the requirements for the use function of the packaging box and the storage environment of the product in the packaging box are getting higher and higher. Some products are required to be packed in a sealed packing box, the air in the box should be pumped out first, and then a certain pressure of nitrogen should be filled into the box, the purpose of which is to protect the product in the box and prolong the service life of the product. The vacuum pumping and nitrogen filling devices of the existing sealed packaging box are respectively arranged on the box body, which has the problems of poor sealing effect, cumbersome operation process and complicated sealing device...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a vacuum pumping and nitrogen filling device for a sealed packing box, which solves the technical problems of complex structure and cumbersome operation process in the existing vacuum pumping and nitrogen filling device for a sealed packing box

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