Switching valve for charging and discharging food

Abstract

The invention provides a switching valve for charging and discharing food, which can conveniently realize CIP cleaning without adding a sealing element between the valve body and the valve core. The switching valve comprises a valve body and a valve core, wherein the valve body is provided with a discharge port and a feed port; the valve core is provided with a switching connecting port aiming atthe discharge port and the feed port; the valve body is around the discharge port and the feed port, and the valve core adopts seal fit with ceramic materials, so that the material is cut off in the valve body; and the valve core can rotate and axially slide. Due to the adoption of the technical scheme, the seal between the valve core and the valve body can be ensured only by dimensional precision, and the material can be cut off and sealed without adding the sealing element. Owing to the stability and small thermal deformation coefficient, the heated ceramic material can not result in the failure of the valve body and the valve core to rotate and axially slide due to excessive thermal expansion, so that the valve body and the valve core can steadily, easily and axially move to the cleaning place for cleaning the CIP.

Description

technical field [0001] The invention relates to a switching valve for feeding and discharging food filling. Background technique [0002] In the food quantitative filling system, the valve body and the rotary valve core in the switching rotary valve for feeding and discharging materials are made of metal-metal, metal-plastic, metal-ceramic and other material combinations, because the valve body and the rotary valve core need to rotate To realize the switching 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 maximized and sealed with sealing elements; this type of structure Due to the existence of the gap, there is the disadvantage of being difficult to clean the dead corner of the sanitation. At the same time, the sealing element is subjected to the environmental changes of alternating cold and heat, which makes the aging speed of the materia...

AI Technical Summary

Problems solved by technology

[0002] In the food quantitative filling system, the valve body and the rotary valve core in the switching rotary valve for feeding and discharging materials are made of metal-metal, metal-plastic, metal-ceramic and other material combinations, because the valve body and the rotary valve core need to rotate To realize the switching 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 maximized and sealed with sealing elements; this type of structure Due to the existence of gaps, there are disadvantages that it is difficult to clean the dead angle of hygiene. 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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