Tank car manhole and production technology thereof

Abstract

The present invention relates to a tank car manhole structure and a production technology thereof; the invention provides a tank car manhole structure comprising a manhole neck, the manhole neck is arranged on the tank body and forms an integral structure together with the tank body. According to the tank car manhole structure and the production technology provided by the invention, welding is unnecessary during the manufacturing process so as to result in no welding defects and simple process; precise forming can be ensured by special tools; no welding test plate is required to be produced so as to reduce parts and save materials; to the tank body with height restriction, the manhole height can be flexibly reduced, which is favorable for increasing the diameter of the tank body; and the manhole formed by drawing and flanging forms an integral structure together with the tank body, which enables a good stability and solves the problem that the manhole is out of rround along the diameter direction.

Description

Technical field [0001] The invention relates to a manhole structure of a tank car, in particular to a manhole structure of a tank car and its production process. Background technique [0002] See Figure 1.1-1.4 , The traditional manhole structure of the tank car is to open a hole in the tank body 10, insert the welded manhole connector 11, and weld it with the tank body to form a T-shaped weld, and then weld the manhole flange 12, the manhole connector 11 and The tank body 10 is welded and connected to form a T-shaped weld. This structure has the following problems: [0003] 1. There is a sudden change in the cross section and a high stress concentration; [0004] 2. Long welding seam and large welding deformation; [0005] 3. It is easy to produce welding defects and cause leakage; [0006] 4. For pressure vessel products, the weld seam of manhole connection pipe is different from that of tank body, and welding test plate needs to be made. [0007] In terms of the production process, ...

AI Technical Summary

Problems solved by technology

[0003] 1. There is a sudden change in section and high stress concentration;

[0004] 2. The welding seam is long and the welding deformation is large;

[0005] 3. It is easy to produce welding defects, resulting in leakage;

After the manufacturing is completed, assemble each part. The process is as follows: after the tank body is assembled and welded, find the horizontal and vertical centerlines on the top of the tank body, and draw a line; draw the assembly position line of the manhole with a template; cut the manhole and the tank body according to the line Assembled intersecting lines; processing hole edge bevel; tank body and manhole connection, reinforcement ring combination; welding → non-destructive testing (pressure vessel products, aluminum alloy, stainless steel are applicable), the production process is quite complicated, materials, more waste

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