Powder protection device

Abstract

The invention discloses a powder protection device, which comprises a first stainless steel powder tank, a second stainless steel powder tank, a plastic gas pipe and a nitrogen tank, wherein the nitrogen tank is connected with a nitrogen main pipe; a gas pressure reducing valve is arranged at an air inlet of the nitrogen main pipe; a first ball valve rapid interface is arranged at the air outlet of the nitrogen pipeline; a second ball valves are arranged on the side wall of the first stainless steel powder tank and the second stainless steel powder tank; one end of the plastic air pipe is connected with the second ball valve through a second ball valve rapid interface. By means of the powder protection device, the plastic air pipes are increased, the pressure is monitored through a pressure gauge, the second ball valve and the first ball valve are opened, so that the nitrogen pressure in the first stainless steel powder tank and the second stainless steel powder tank is always consistent with the nitrogen pressure in the nitrogen pipeline, the powder is always protected in a nitrogen atmosphere and cannot be oxidized due to air leakage, and the powder can be safely and effectivelystored for a long time.

Description

technical field [0001] The invention relates to the technical field of powder protection, in particular to a powder protection device. Background technique [0002] There are two ways to store the fine powder after pre-sintered NdFeB jet milling before being used for molding. The first is to put it in a high-pressure plastic bag, and the bag is filled with nitrogen gas and then tied tightly with a rubber band; the second One is that the powder is placed in a sealed stainless steel tank, which is flushed with nitrogen and stored. [0003] However, there are disadvantages in the storage of the above two kinds of powders. They are stored in high-pressure plastic bags. Because of the quality of the bags, air leakage often occurs. At the same time, if the powders are stored for a long time, the nitrogen in the bags will slowly leak, resulting in powder It is easy to oxidize, and the storage period is short, which affects the performance of subsequent products; simply using stain...

AI Technical Summary

Problems solved by technology

[0003] However, there are disadvantages in the storage of the above two kinds of powders. They are stored in high-pressure plastic bags. Because of the quality of the bags, air leakage often occurs. At the same time, if the powders are stored for a long time, the nitrogen in the bags will slowly leak, resulting in powder It is easy to oxidize, and the storage period is short, which affects the performance of subsequent products; simply using stainless steel tanks to store powder also has shortcomings. There will be air leakage. At the same time, if the powder is stored for a long time, the nitrogen in the tank will slowly leak, and the powder is still at risk of oxidation. Although the storage period is a little longer than that stored in high-pressure plastic bags, it still cannot be stored safely.

Images