A method for forming a pressure vessel head

Abstract

The invention discloses a forming method for a sealing head of a pressure container. The forming method comprises the following steps of: 1) lifting a lower-layer binder ring onto a hydraulic press tomount and fasten; 2) putting a sealing head steel plate onto the lower-layer binder ring, lifting an upper-layer binder ring which is matched with the lower-layer binder ring onto the sealing head steel plate, driving the upper-layer binder ring by the hydraulic press to press the sealing head steel plate; 3) starting a sealing head of the hydraulic press to press the sealing head steel plate toform the sealing head; 4) putting a sealing head lifting device onto a sealing head placing base; 5) starting the sealing head placing base to drive the sealing head to rotate, and driving a roller wheel on an aligning device to synchronously move towards the center of the sealing head placing base; 6) stopping a roller wheel to complete aligning when the sealing head is in contact with an infrared-ray control switch on an aligning device and the infrared-ray control switch is light; 7) starting an electromagnetic sucking disc on the sealing head placing base to fasten the sealing head; and 8)regulating a trimming device for trimming the sealing head.

Description

technical field [0001] The invention relates to the field of pressure vessel manufacturing, in particular to a method for forming the head of a large pressure vessel. Background technique [0002] The head is a part of the container, which is a kind of boiler part in the pressure vessel. It is usually used to connect the two ends of the pressure vessel to the cylinder body by welding, and there is a kind of welding used for sealing the end of the pipe. Pipe fittings products. According to different geometric shapes, it can be divided into spherical, elliptical, dish-shaped, spherical-shaped, conical shell and flat cover, among which spherical, elliptical, dish-shaped, and spherical-shaped heads are collectively referred to as convex heads. . In terms of welding, it is divided into butt welding head and socket welding head. Used in various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment, etc. [0003] Previou...

AI Technical Summary

Problems solved by technology

The edge-holding device commonly used in China is flat-edge edge-holding, and the flat-edge edge-holding force required by cold pressing is much higher than that of hot-press forming. Therefore, the pressure of the cold-pressed head is very high for the press, and the cold-pressed pressing is about 350*100cm The elliptical head requires a blank holder force of about 3,000 tons, resulting in high equipment costs, and cannot be formed at one time, and the mold is easy to wear and has a short service life

[0004] At the same time, after being pressed by the arc-shaped die of the hydraulic press, due to the uneven straight edge of the port or the existence of skirts and other problems, it is necessary to go through the straightening and cutting process of the head. The existing cutting edges are all manually aligned. Large mass (about 3 meters in diameter), high work intensity, and poor alignment effect. The height error of the straight edge after edge cutting can only be controlled at about 10mm, which will affect the welding and sealing of subsequent pressure vessels.

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