High-precision welding process for low-temperature reaction pressure vessel

Abstract

The invention relates to a high-precision welding process for a low-temperature reaction pressure vessel. The high-precision welding process for the low-temperature reaction pressure vessel adopts the following pressure vessel welding fixture, and the pressure vessel welding fixture comprises a bottom plate, a support seat, a lead screw motor, a lead screw, a clamping supporting plate and a clamping mechanism. The high-precision welding process for the low-temperature reaction pressure vessel by adopting the above pressure vessel welding fixture comprises the following steps that S1, a vessel body is placed; S2, container end cover placement is conducted; S3, container end cover butt joint is conducted; and S4, container welding is conducted. According to the high-precision welding process for the low-temperature reaction pressure vessel, the problems that when an existing pressure container is in butt joint, the structure of an end cover of the pressure container cannot be clamped and locked, the position and angle of the end cover are deflected, the end cover and a body cannot be in butt joint accurately, the welding effect of the pressure container is poor, and when the pressure container is in butt joint, clamping of moving force cannot be performed, so that the end cover and the body are dislocated when being in butt joint can be solved.

Description

Technical field[0001]The present invention relates to the field of pressure vessel processing technology, and more particularly to a high-precision welding process of low-temperature reactive pressure vessels.Background technique[0002]The pressure vessel refers to a closed device that is a gas or liquid carrying a certain pressure. Pressure vessels in chemical and petrochemical leadership, mainly used for heat transfer, mass transfer, reaction, etc., as well as storage, transportation, gas or liquefied gas; there is also a wide range of applications in other industrial and civilian sectors, such as air Compressor, etc.[0003]The body of the pressure vessel is a hollow cylindrical structure, and the outer side surface is uniformly provided in its longitudinal direction, and the outer end of the container end cap is an arcuate structure, the body and end caps of the container respectively. It needs to be docked after molding, and then it is seal by welding.[0004]Some solutions have als...

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Problems solved by technology

[0004] For welding fixtures for cylindrical vessels, some solutions have also been proposed in the existing patent literature; the utility model patent with application number 201920553362.1 discloses "a pressure vessel welding fixture". The adjustment mechanism and the height adjustment mechanism are used to position the pressure vessel, which is convenient for its fixing and welding. The above-mentioned use of the new patent can only splice and position the pressure vessel body divided into two, and has no effect on the welding of the pressure vessel body and the end cover. Involved; the utility model patent with the application number 201821135285.X discloses "a welding fixture that can adapt to the size and shape of the heating pipe". The HVAC pipe is locked. This utility model patent cannot be used for docking the end cap of the pressure vessel with the body structure. The problems existing in the docking of the existing pressure vessel are as follows:

[0005] The end cover of the pressure vessel cannot be clamped and locked according to its structure, so that the position and angle of the end cover are deflected, resulting in the inaccurate butt joint between the end cover and the body, which makes the welding effect of the pressure vessel poor. It is impossible to carry out clamping connection of moving force, so that the end cover will be displaced after docking with the body, which will affect the welding accuracy of the pressure vessel;

[0006] The clamping plate at the outer end of the pressure vessel end cover cannot be turned over after it is docked with the vessel body, thus affecting the welding operation of the pressure vessel

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