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Technique for producing metal corrugated pipe

A technology of metal bellows and production technology, which is applied in the field of production technology of single-layer or multi-layer metal welded bellows, can solve the problems of loss and damage, and achieve the effects of reducing bomb loss, improving fatigue life, and reducing cracking and fracture damage

Inactive Publication Date: 2009-12-02
成都赛乐化新机电有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For flammable, explosive, toxic and corrosive media, the loss and personal injury are huge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Mechanical seal bellows of urea solution pump in chemical fertilizer plant

[0052] Due to the strong corrosion, the mechanical seal of the bellows elastic element is adopted, and the material of the bellows is austenitic stainless steel 00Cr17Ni14Mo2. The production process of the corrugated pipe is as follows: clean the stainless steel strip with washing gasoline; pass the 0.12mm stainless steel through the composite mold to complete the blanking, punching and calendering deformation of the corrugated pipe. The inner and outer diameters of the bellows are 52.5mm and 65mm respectively; After the shot peening treatment of Φ0.1mm sand grains; wash the dirt of the wave plate with washing gasoline; put the wave plate into the inner circle welding fixture to clamp, and weld the inner circle of the wave plate with a micro-beam plasma arc welding machine, and ensure The welding seam overlaps 5 ~ 10mm; after checking that there is no welding defect with a 10 times ma...

Embodiment 2

[0053] Example 2 heat medium pump mechanical seal bellows

[0054] The medium solution of the heat medium pump is HTM (37% biphenyl, 63% biphenyl ether), and the medium temperature is as high as 350°C. Due to the high temperature, the mechanical seal of the elastic element of the bellows is used, and the material of the bellows is precipitation hardening stainless steel 0Cr17Ni7Al . The production process of the bellows is as follows: clean the stainless steel strip with washing gasoline; put the 0.12mm stainless steel strip into a vacuum furnace, heat it to 1050°C±10°C, and keep it warm for 12 minutes for solid solution treatment; complete the bellows wave plate through a composite mold The blanking, punching and rolling deformation of the bellows, the inner and outer diameters of the bellows are 46mm and 59mm respectively; after shot blasting with Φ0.1mm sand grains; clean the dirt on the wave plate with washing gasoline; put the wave plate into the inner Clamp in the round...

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Abstract

The invention discloses a production process of a metal bellows, which comprises the following steps: ① corrugated plate blanking and calendering deformation; ② shot peening treatment; ③ welding; ⑤ heat treatment; ⑥ embedded graphite ring; polishing. The process of the present invention is suitable for single-layer or multi-layer corrugated metal welded bellows. Its main feature is that after shot peening treatment, the corrugated plate will produce a certain micro-deformation, which improves the fatigue life of the corrugated tube and can reduce the corrugated tube in Crack and fracture damage during use; the welding process method invented at the same time increases the welding strength of the bellows, reduces the oxidation of the bellows during welding; the heat treatment process of the present invention reduces the oxidation produced during the heat treatment of the bellows, and Make its elastic properties more stable. Therefore, the invented welding and heat treatment process reduces the loss of bullets, rupture and fracture damage of the bellows during use.

Description

technical field [0001] The invention relates to a bellows elastic element applied to machinery, petroleum, chemical industry, chemical fiber, papermaking, electric power and metallurgical industries, mechanical seal products and instruments and other equipment, specifically a single-layer or multi-layer metal welded bellows Production Process. Background technique [0002] Elastic elements mainly use springs and bellows. For elastic elements used under special working conditions, such as high temperature and strong corrosion of mechanical seal products, if spring elastic elements are used, there are auxiliary sealing rings in the structure to assist The sealing ring is generally made of rubber material. The characteristic of this kind of rubber material is that it is not resistant to high temperature, it is easy to corrode under strong corrosive acid and alkali conditions, and it is not resistant to negative pressure, etc. Therefore, under such harsh working conditions, met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J3/04
Inventor 吴穷万里翔
Owner 成都赛乐化新机电有限公司
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