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Preparation method of high-pressure seamless steel cylinder

A technology of seamless steel and steel cylinders, applied in the manufacture of container structures, pressure vessels, mechanical equipment, etc., can solve the problems of bottle cavity rust, energy consumption of metal debris, etc., achieve stable heating temperature, reduce production energy consumption, heat fast effect

Active Publication Date: 2018-01-19
SHANDONG TIANHAI HIGH PRESSURE CONTAINER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art, aiming at the problems of rust, metal debris and high energy consumption in the bottle cavity of the existing high-pressure seamless steel cylinder preparation method, and to provide a preparation method for high-pressure seamless steel cylinders method

Method used

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  • Preparation method of high-pressure seamless steel cylinder
  • Preparation method of high-pressure seamless steel cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: as figure 1 Shown, a kind of preparation method of high-pressure seamless steel cylinder is made up of following production sequence:

[0029] (1) pipe cutting, the seamless steel pipe is cut into several steel cylinder blanks with a length of 1450mm, which is the shortest length that meets the processing needs of the preparation method of the high-pressure seamless steel cylinder, and saves raw materials compared to other lengths;

[0030] (2) Bottom closing, the bottoming of the steel cylinder blank after step (1) is cut, and the bottoming is completed by the bottoming device, which includes clamping parts, electromagnetic heating parts and rolling parts, and the electromagnetic heating parts are directly installed The design on the bottom receiving device avoids heat loss during the transfer process; the clamping part fixes one end of the steel cylinder blank, and the electromagnetic heating part electromagnetically heats the other end of the steel cyli...

Embodiment 2

[0045] Embodiment 2: the main steps of the preparation method of the high-pressure seamless steel cylinder that the present embodiment relates to are the same as embodiment 1, and the difference is that the shot blasting liquid described in step (10) contains 3% (percentage by weight) diethanolamine, 3% (weight percent) triethanolamine, 5% (weight percent) oxalic acid, 5% (weight percent) phosphoric acid, 2% (weight percent) zinc dihydrogen phosphonate, 2% (weight percent) benzotriazole and 80 % (percentage by weight) water, because the inner surface is not sprayed with paint, the diethanolamine contained in the shot blasting liquid, triethanolamine, zinc dihydrogen phosphonate, benzotriazole have antirust function, and the oxalic acid contained in the shot blasting liquid 1. Phosphoric acid has the function of rust removal; oxalic acid, as a weak acid, will not corrode steel shots, and the price is relatively cheap; the raw materials contained in shot blasting liquid are simpl...

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Abstract

The invention relates to a preparation method of a high-pressure seamless steel cylinder. The preparation method comprises the following production steps of pipe cutting, bottom shrinkage, cylinder bottom treatment, shell nosing, thermal treatment, air cooling, cylinder opening treatment, steel seal stamping, water pressure testing, shot blasting derusting, powder spraying, solidification, cylinder valve installation, air tightness detection and finished product packaging, wherein in the air cooling process, an air cooing system is used for recovering heat dissipated from the steel cylinder and conveying the heat to a thermal treatment furnace, so that energy consumption is reduced, and thermal radiation hazards in a workshop are reduced; during shot blasting derusting, shot blasting fluid containing derusting and rust protection components is added and used; in the powder spraying process, it can be guaranteed that the thickness of a plastic powder coating is within the range of 80-130 microns through numerical cooperation of the distance between a powder spray gun and the outer surface of a steel cylinder body, the movement speeds of the powder spray gun relative to the steel cylinder body and the powder supply air pressure of the powder spray gun; and it can be guaranteed that the solidified plastic powder with the thickness within the thickness range can fully protect the outer surface of the steel cylinder, and recognition of a steel seal on the steel cylinder cannot be affected.

Description

Technical field [0001] The invention relates to the field of high-pressure vessels, and in particular to a method for preparing a high-pressure seamless steel cylinder. Background technique [0002] High-pressure seamless cylinders are widely used to store and transport various compressed gases. The cylinder preparation methods commonly used by large cylinder manufacturing companies generally include the following sequence: pipe cutting, bottom closing, bottom milling, closing, heat treatment, bottle mouth treatment, pressure detection , rust removal and painting, bottle loading valve, air tightness test, packaging of finished products, but the specific operations and technical plan details of each process are different. [0003] Most cylinder rust removal methods use shot blasting or shot blasting. The most widely used method at present is shot blasting. It is divided into dry shot blasting and wet shot blasting according to whether shot blasting liquid is added: Dry shot b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00F17C1/14
CPCB23P15/00F17C1/14F17C2203/0641F17C2209/2181
Inventor 王仕召周丙善王宏伟
Owner SHANDONG TIANHAI HIGH PRESSURE CONTAINER CO LTD
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