Valve port device with sealing function for valve bag

Abstract

The invention relates to a valve port device with a sealing function for a valve bag. More than one valve block is arranged in a valve barrel; one end of each valve block, which faces a feeding port of the valve barrel, is fixed on the inner wall of the valve barrel; and one end of each valve block, which faces a discharging port, is movably separated from the valve barrel. The valve port device provided by the invention is used on a paper, plastic or paper-plastic composite valve port bag and used for replacing an existing valve port, and the multiple valve blocks are arranged in the valve barrel, so that material leakage can be stopped multiple times and in multiple dimensions: materials in the bag are extruded in multiple directions from outside to inside to enable the valve barrel to be closed to achieve primary sealing, materials remaining in the valve barrel and materials extruded into the valve barrel can be intercepted by the secondary valve block to achieve secondary sealing,and a gap between the secondary valve block and the discharging port of the valve barrel is filled with the materials which can expand to further reduce a main channel of the valve port device to prevent the materials from leaking so as to achieve tertiary sealing. Due to the multi-layer and multi-dimensional sealing mode, material leakage is greatly relieved.

Description

technical field [0001] The invention relates to a valve port device of a valve bag with a sealing function, in particular to a valve port device for sealing a single-layer or multi-layer valve bag composed of paper, plastic and paper-plastic, and belongs to the field of packaging technology. Background technique [0002] The valve bag is famous for its high filling efficiency and superior packaging performance. Its unique valve self-sealing principle is suitable for automatic production under large industrial conditions. Whether it is a single-piece, double-piece inner valve port, or a cylindrical inner valve port, an outer valve port until heat sealing, ultrasonic valve ports emerge in endlessly, but in solving the problem of the material in the bag and the material remaining in the valve port channel passing through the valve port continuously The problem of leakage has never had a satisfactory solution. [0003] To solve the problem of material leakage from the valve por...

AI Technical Summary

Problems solved by technology

This kind of external valve port in the "physically closed" state, in the case of material handling, because the material is directly squeezed to the bonding point of the valve port, the pressure difference between the inside and outside of the bag is too large, which may easily cause the valve port adhesive to fall off

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