A titanium screw conveyor

Abstract

A titanium screw conveyor overcomes the problem that the existing screw conveyors are not suitable for conveying highly corrosive materials. The casing is welded as a whole, and a number of mandrel installation holes corresponding to the position are processed on the shaft head shaft and the second sleeve, the mandrel is inserted into the mandrel installation hole, the lining is placed on the mandrel, and stacked on it Weld the titanium surfacing layer to make the shaft head shaft, mandrel, first casing, second casing, lining and titanium surfacing layer integrated, the shell of the screw conveyor, the screw shaft bracket, the shaft tube, and the shaft tube Connectors, helical blades, first casing, second casing, lining, and titanium surfacing layer are made of titanium, and the shaft head shaft and mandrel are made of steel. The beneficial effect is that it not only ensures the strength of the screw shaft but also The corrosion resistance of the screw shaft is guaranteed, so that the screw conveyor can not only meet the strength of the working condition but also meet the requirements of anti-corrosion performance, and has a simple structure, safe and stable operation, and a long service life.

Description

technical field [0001] The invention belongs to the technical field of screw conveyors, in particular to a titanium screw conveyor capable of transporting highly corrosive materials. Background technique [0002] Screw conveyors are widely used in various industries, such as building materials, chemical industry, electric power, metallurgy, coal, grain and other industries, suitable for horizontal or inclined conveying of powdery, granular and small lump materials, such as ash, slag, cement, coal , grain, etc., the material temperature is less than 200 ℃. The working principle of the screw conveyor is that when the screw shaft rotates, the gravity of the material and the friction generated by the inner wall of the screw conveyor shell make the material move forward along the inner wall of the conveyor shell under the push of the blades. , the situation is as if the non-rotatable nut makes a translational movement along the rotating screw, and the movement of the material in...

AI Technical Summary

Problems solved by technology

The screw conveyors in the prior art are mainly made of carbon steel or stainless steel. Due to the poor corrosion resistance of the material itself, it is not suitable for conveying highly corrosive materials. Titanium has good corrosion resistance and is suitable for conveying highly corrosive materials. materials, but the strength of titanium itself is low, which can meet the requirements of the working conditions for conveying materials, but it cannot meet the strength requirements of the shaft head of the screw conveyor. Therefore, in order to ensure the strength of the shaft head of the screw In order to improve the anti-corrosion performance of the shaft head of the device, it is necessary to invent a shaft head connection structure that can meet both the strength and the anti-corrosion performance of the titanium and steel connection.

However, because titanium and steel will react to form brittle compounds at high temperatures, titanium and steel cannot achieve high-strength welding

Titanium and steel currently have two welding methods to weld them together. One is explosive welding, such as titanium-steel composite steel plate. The shear strength is very low, which cannot meet the working conditions of the shaft head of the screw conveyor. The second is to use one or more transition metals for segmental welding, which can weld titanium and steel together, but the problem is that although There is no area requirement, but the strength of the weld seam is extremely low, and it cannot meet the working condition requirements of the shaft head of the screw conveyor

However, this structure only ensures that the transition leader used has good quality and sufficient strength, and is only suitable for the connection between titanium plates and stainless steel plates, and cannot meet the requirements of the working conditions of the shaft head of the screw conveyor.

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