Rivet type lining fluorine axial-flow pump

Abstract

The invention discloses a rivet type lining fluorine axial-flow pump for conveying liquid with strong corrosivity in the chemical industry field, comprising a metal insert and a lining fluorine layer. A plurality of through holes are evenly distributed on the metal insert. A metal cap is arranged on each through hole at the outer side of the metal insert, whose inner cavity sectional area is larger than the through hole sectional area. The lining fluorine layer is riveted on the inner side of the metal insert by the inner cavity of the metal cap and the through hole. The pump adopts the simple rivet type connection mode. The through hole lining fluorine material and the metal insert are engaged better, not effecting the pump strength. The vacuum siphon generated by the lining fluorine layer in the reinforcing cycling state is removed. The fluorine layer tearing and dropout is avoided. The service life of the pump is greatly enhanced.

Description

technical field [0001] The invention relates to a chemical pump for transporting various strong corrosive liquids in the chemical industry, in particular to an axial flow pump whose flow part of the pump is lined with fluorine plastic. Background technique [0002] With the continuous development of science and technology, fluorine-lined pumps are now used when transporting strong corrosive liquids in the chemical industry, that is, the flow-through part of the pump is molded with fluoroplastics, which ensures the corrosion resistance of the pump. For example, in the industrial production processes of titanium dioxide industry, iron and steel industry, phosphorus chemical industry, organic chemical industry, etc., large quantities of acid are needed, and a large amount of waste acid will also be produced. The pumps used for the transportation of these acids have steel-plastic composite corrosion-resistant Mixed-flow pumps and axial-flow pumps, etc., but how to ensure that th...

AI Technical Summary

Problems solved by technology

This connection method has the following disadvantages: 1. Although the connection strength is improved by the first method, the strength of the pump cover and the fluorine lining layer of the pump body is greatly reduced, which makes it impossible to transport high-pressure liquid; 2. The second method is used The connection method, on the one hand, has a complicated processing technology: drilling, tapping and screwing are required. On the other hand, during the working process of the pump, the vibration of the pump will cause the screws to loosen. The normal operation of the pump is affected by the falling off of the screw

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