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Welding structure and welding method of longitudinal seam of stainless steel gas cylinder inner bladder

A welding structure, stainless steel technology, applied in welding connection methods, welding/welding/cutting items, welding equipment, etc., can solve the high technical level requirements of welding operators, high post-investment and maintenance costs, and expensive plasma arc welding equipment. and other problems, to achieve the effect of low cost of use and maintenance, prevention of welding hot crack defects, and prevention of incomplete fusion and incomplete penetration defects.

Active Publication Date: 2017-11-03
ANHUI DAPAN SPECIAL EQUIP VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this welding process, because the plasma arc welding equipment is relatively expensive, the one-time investment is relatively large
Moreover, there are many welding parameters of this type of equipment, which requires high technical level of welding operators; the welding torch and control circuit are also relatively complicated, the service life of the nozzle is very low, and the later investment and maintenance costs are high; during the welding process, it is easy to produce Disadvantages of double arc, and the observation of the arc action area is prone to welding defects
[0006] There are also some manual welding methods, but this welding process needs to be welded several times for the same weld seam, and for the plate thickness ≥ 4mm, it needs to be grooved to complete, the work efficiency is low, and the pass rate of non-destructive testing is not high.

Method used

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  • Welding structure and welding method of longitudinal seam of stainless steel gas cylinder inner bladder
  • Welding structure and welding method of longitudinal seam of stainless steel gas cylinder inner bladder
  • Welding structure and welding method of longitudinal seam of stainless steel gas cylinder inner bladder

Examples

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Effect test

Embodiment 1

[0036] Such as Figure 1~3 As shown, the welding structure of this embodiment includes a copper strip 3, and the copper strip 3 is provided with a main air hole 302 and an air guide groove 305 along the length direction, and the main air hole 302 and the air guide groove 305 are arranged in parallel, and the main air hole 302 and the air guide groove 305 are arranged in parallel. A plurality of air guide holes 304 are arranged between the air grooves 305, and the two ends of the air guide holes 304 are respectively connected with the leading air holes 302 and the air guide grooves 305. The cross section of 101 is located in the same plane.

[0037] The diameter of the main air hole 302 is 10 mm, the diameter of the air guide hole 304 is 1.5 mm, and the diameter of the air guide groove 305 is 12 mm.

[0038] Copper bar 3 is provided with cooling water inlet hole 301 and cooling water outlet hole 303 along the length direction, and cooling water enters copper bar 3 from cooling...

Embodiment 2

[0057] Such as Figure 4 As shown, the arc-starting plate 2 and the arc-extinguishing plate 4 of this embodiment are both one piece, and the center lines of the arc-starting plate 2 and the arc-extinguishing plate 4 are on the same straight line as the longitudinal slit 101 .

[0058] Other implementations are the same as in Example 1.

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Abstract

The invention discloses a welding structure and a welding method for a longitudinal seam of a stainless steel gas cylinder liner, which comprises a strip-shaped auxiliary plate. The grooves are arranged in parallel, and a plurality of small air guide holes are arranged between the main air hole and the air guide groove. The two ends of the air guide small holes are respectively connected with the main air hole and the air guide groove. The cross-sections of the longitudinal seams lie in the same plane. Welding methods, including rolling; butt spot welding; spot arc starting and arc extinguishing plates; clamping; welding. The invention adopts the MIG automatic welding process, and the one-time investment cost of welding equipment and the like is low; and in the later use process, the use and maintenance costs of the investment are also low, and the work efficiency is also greatly improved. By adopting the technology in the invention, in the actual longitudinal seam welding process of welding the insulating gas cylinder and the LNG vehicle bottle, the pass rate of the non-destructive testing reaches more than 99.4%; the physical and chemical test items fully meet the standard requirements.

Description

technical field [0001] The invention relates to a welding process for the longitudinal seam of an inner tank of a heat-insulating gas cylinder and an LNG vehicle bottle, in particular to a welding structure and a welding method for a longitudinal seam of an inner tank of a stainless steel gas cylinder. Background technique [0002] Welded insulated gas cylinders and LNG vehicle cylinders (also called liquefied natural gas cylinders for vehicles) are mainly composed of an inner tank and an outer shell, with a vacuum interlayer between the inner tank and the outer shell. In order to improve the insulation effect of the gas cylinder, the vacuum interlayer requires vacuuming. The inner tank of the gas cylinder is used to store low-temperature medium and withstand the internal pressure generated by the vaporization of the low-temperature medium; it is composed of three parts: the front head assembly of the inner tank, the cylinder body of the inner tank and the rear head assembly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K9/32B23K9/235B23K9/025B23K35/38B23K101/12B23K103/04
CPCB23K9/0253B23K9/164B23K9/173B23K9/235B23K9/323B23K9/325B23K35/383B23K2101/12B23K2103/04
Inventor 黄同福周其雷陈伟
Owner ANHUI DAPAN SPECIAL EQUIP VEHICLE CO LTD
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