Feeding and discharge switch valve for food filling

Abstract

The invention provides a feeding and discharging switch valve for food filling, which comprises a valve body and a valve core; a discharging port and a feeding port are arranged on the valve body, the valve core is provided with a switch joint port for the discharging port and the feeding port, and the valve body adopts ceramic material on the periphery of the discharging port and the feeding port, and the valve core to realize seal fit and form isolation of material. As the technical scheme of the invention is adopted, the sealing of valve core and the valve body is guaranteed only through size accuracy, no additional seal element is needed, the material isolation is realized and the sealing is realized, as the abrasion resistance of the ceramic is higher, the service life of the switch valve is longer due to smaller abrasion; as the ceramic material has stability, the thermal deformation coefficient is very small, the condition that the valve body and the valve core cannot rotate and axially slide due to thermal expansion interference after being heated is not happened so the high position CIP cleaning can be realized conveniently.

Description

technical field [0001] The invention relates to a switching valve for volumetric food filling and discharging. Background technique [0002] In the food volumetric quantitative filling system, the valve body and the rotary valve core in the switching rotary valve for feeding and discharging materials have metal-metal, metal-plastic, metal-ceramic and other material combinations, because the valve body and the rotary valve core It needs to be rotated to realize the switch between feeding and discharging, and it needs to be able to rotate after being heated and expanded at high temperature during automatic cleaning in place (CIP). The radial gap must be enlarged and sealed with sealing elements; Due to the existence of gaps, the structure has the disadvantage of being difficult to clean in the sanitary dead corners. At the same time, the sealing element is subjected to constant changes in the environment of alternating cold and heat, which makes the material aging faster and h...

AI Technical Summary

Problems solved by technology

[0002] In the food volumetric quantitative filling system, the valve body and the rotary valve core in the switching rotary valve for feeding and discharging materials have metal-metal, metal-plastic, metal-ceramic and other material combinations, because the valve body and the rotary valve core It needs to be rotated to realize the switch between feeding and discharging, and it needs to be able to rotate after being heated and expanded at high temperature during automatic cleaning in place (CIP). The radial gap must be enlarged and sealed with sealing elements; Due to the existence of gaps, the structure has the disadvantage of being difficult to clean the dead corners. At the same time, due to the continuous changes in the environment of alternating cold and heat, the sealing element will accelerate the aging speed of the material and shorten the service life, resulting in an increase in the operating cost of the equipment.

In addition, due to the sealing of the sealing element, it is difficult to achieve a large distance of axial sliding and cannot achieve high-position CIP cleaning

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