Prestressed wire winding recipient

Abstract

A prestressed wire winding recipient can be applied to hot metal extruding technology, and particularly can be applied to the hot extrusion of seamless steel tubes with large caliber and thick walls. The recipient comprises an inner liner, a middle liner, a thermal insulation layer, an outer liner and a steel wire layer, wherein a hearing rod hole is arranged in the middle liner, and a heating element is arranged in the hole and is used for preheating the recipient; the thermal insulation layer is arranged between the middle liner and the outer liner, consists of an inner protective plate od the thermal insulation layer, a thermal insulation material and an outer protective plate of the thermal insulation layer, and is used for preventing heat from being transmitted to the outer liner and the steel wire layer from the inner liner and the middle liner which are in high temperature; an annular cooling groove is arranged on the inner surface of the outer liner and is used for cooling the outer liner by leading cooling media in; and the temperature near a contact interface between the steel wire layer and the outer liner is detected in real time by a temperature sensor. As the middle liner is provided with a preheating hole to preheat the recipient, a preheating temperature field which is more uniform on the radial and circumference directions can be obtained by the recipient, and the reasonable stress distribution in the recipient can be realized, so that the fatigue life of the recipient can be prolonged greatly.

Description

technical field [0001] The invention relates to a large ferrous metal hot-extruded high-temperature and high-pressure bearing container, which belongs to the field of metal hot-extrusion, and is especially suitable for hot-extrusion of large-diameter thick-walled seamless steel pipes. Background technique [0002] The extrusion cylinder is one of the key molds in the metal extrusion process, and it is also the most expensive mold. The billet is deformed in the extrusion barrel, which bears the axial friction and radial pressure generated by the forward movement of the billet during the extrusion process. During the hot extrusion process of steel, the temperature of the billet is as high as 1200°C, and the extrusion cylinder is subjected to high temperature, high pressure and high friction, and the working condition is extremely bad. During the hot extrusion process of large-diameter thick-walled seamless steel pipe, the radial surface pressure produced by the billet on the ...

AI Technical Summary

Problems solved by technology

When placing steel ingots, the problem of eccentric placement of steel ingots is difficult to solve

Due to the deflection of the steel ingot, the heating temperature distribution on the inner surface of the extrusion cylinder will be uneven

This causes uneven metal flow during extrusion, making the steel pipe more prone to bending during extrusion

[0013] In terms of heat insulation, due to the use of ceramic heat insulation layer, the material is brittle and has poor ability to withstand impact. Under the repeated thermal load and working load of the extrusion cylinder, ceramics are prone to brittle cracks, which will affect the extrusion cylinder. performance

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