Vacuum pumping and nitrogen filling mechanism in rotary type vacuum nitrogen filling machine

Abstract

The invention discloses a vacuum pumping and nitrogen filling mechanism in a rotary type vacuum nitrogen filling machine. The vacuum pumping and nitrogen filling mechanism comprises a ring base, wherein a vacuum cavity is arranged in the ring base; each sealing sleeve communicates with the vacuum cavity through a vacuum pumping passage with a vacuum valve, the vacuum valve is controlled by a vacuum valve drive mechanism, a hollow vacuum tube is movably supported in a main shaft; a first rotating joint is arranged at the lower end of the vacuum tube, and the upper end of the vacuum tube communicates with the vacuum cavity; a nitrogen gas cavity is formed in the ring base, each sealing sleeve communicates with the nitrogen gas cavity through a nitrogen charging channel with a nitrogen charging valve, the nitrogen charging valve is controlled by a nitrogen charging valve drive mechanism, a connecting base is fixed to the top of the main shaft, and a nitrogen inlet, a nitrogen outlet and a nitrogen inlet channel in communication with the nitrogen inlet and the nitrogen outlet are formed in the connecting base; a second rotating joint capable of communicating the nitrogen inlet with a nitrogen charging machine is sleeved outside the connecting base; and the nitrogen outlet communicates with a nitrogen cavity inlet in the side wall of the ring base through a nitrogen connecting tube. The vacuum pumping and nitrogen filling mechanism has the advantages of high nitrogen charging efficiency, a high nitrogen utilization rate and low nitrogen consumption.

Description

technical field [0001] The invention relates to the technical field of food nitrogen filling equipment, in particular to a vacuum pumping and nitrogen filling mechanism in a rotary vacuum nitrogen filling machine. Background technique [0002] Potato chips are a very popular snack food at present, and they are generally packed in cylindrical cans. In the production process of potato chips packaging, before the potato chip tubes that have been put into the potato chips are sealed, it is generally necessary to fill the potato chip tubes with nitrogen and other protective gases to ensure the storage quality of sealed foods such as potato chips. At present, an air-filled chamber is generally used to fill the potato chip tube with nitrogen. The air-filled room is a relatively airtight space. The inflatable chamber is filled with nitrogen in a non-targeted manner. Although the gas-filled chamber can achieve the purpose of filling nitrogen, it still has the following disadvantage...

AI Technical Summary

Problems solved by technology

Although the gas-filled chamber can achieve the purpose of filling nitrogen, it still has the following disadvantages: (1) The structure of the gas-filled chamber is complex and the price is high. The nitrogen gas in the gas-filled chamber is continuously open during use, and there is no targeted filling of nitrogen gas, resulting in nitrogen consumption. Large gas volume and low nitrogen utilization rate increase the cost of use of the enterprise; (2) The residual oxygen in the filled potato chip tube is high, thus reducing the anti-oxidation effect on sealed foods such as potato chips

Images