CN203679502U - Structure capable of reducing residual stress and used for a tube and tube plate welding method - Google Patents

Structure capable of reducing residual stress and used for a tube and tube plate welding method Download PDF

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Publication number
CN203679502U
CN203679502U CN201420065456.1U CN201420065456U CN203679502U CN 203679502 U CN203679502 U CN 203679502U CN 201420065456 U CN201420065456 U CN 201420065456U CN 203679502 U CN203679502 U CN 203679502U
Authority
CN
China
Prior art keywords
tube
welding
residual stress
tube plate
tube sheet
Prior art date
Application number
CN201420065456.1U
Other languages
Chinese (zh)
Inventor
许恒
刘明珠
宋志刚
苗强
袁志威
Original Assignee
中国船舶重工集团公司第七�三研究所
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Application filed by 中国船舶重工集团公司第七�三研究所 filed Critical 中国船舶重工集团公司第七�三研究所
Priority to CN201420065456.1U priority Critical patent/CN203679502U/en
Application granted granted Critical
Publication of CN203679502U publication Critical patent/CN203679502U/en

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Abstract

A structure capable of reducing residual stress and used for a tube and tube plate welding method is characterized in that an annular groove is formed around a tube opening of a tube plate, then a tube and the tube plate are tightly attached together through an expandable tube joint, so that the tube is flush with the tube plate, and finally the tube and the tube plate are welded through using argon arc welding without filler metal. The structure has the advantages that groove welding can be used for effectively reducing welding residual stress, so that the influence range is narrowed to be a groove range, and therefore the tube plate is prevented from deforming after welding; the welding structure can further effectively reduce stress corrosion and prolong service life of a cooler.

Description

A kind of structure of the tube-to-tube sheet connection welding method that reduces residual stress

technical field:

The utility model relates to welding technology field, refers in particular to a kind of structure of the tube-to-tube sheet connection welding method that reduces residual stress.

background technology:

The connected mode of tube sheet and cooling tube generally has expanded joint, welding and expanded and welded tube joint and several forms such as uses, and joint junction is that the place of leaking the most easily occurs cooler.If quality of connection is bad, directly have influence on the safe operation of equipment and even unit.Conventional Welding Structure causes the inefficacy of joint as shown in Figure 1 possibly, mainly contains: a) joint lost efficacy because temperature stress is lax; B) joint lost efficacy because pressure-acting leaks; C) tube bank produces vibration under fluid impact, makes joint fatigue rupture; D) manufacturing process is unreasonable, and in joint, expanded joint residual stress is excessive, causes in operation and fatigue rupture.

utility model content:

The purpose of this utility model is to provide a kind of structure of the tube-to-tube sheet connection welding method that reduces residual stress, and in solution traditional welding, residual stress is compared with tube plate deformation large and that cause and the problem of stress corrosion.

The purpose of this utility model realizes as follows: a kind of structure of the tube-to-tube sheet connection welding method that reduces residual stress, it is characterized in that: around the mouth of pipe of tube sheet, open an annular groove, by expanded joint, pipe and tube sheet are close together again, tube sheet is flushed with pipe, finally use without the argon arc welding of filling metal tube-to-tube sheet connection is welded.

The beneficial effects of the utility model are, one, use groove welding can effectively reduce welding residual stress, and its coverage is contracted within the scope of groove, prevent that tube sheet from deforming after welding; Two, this kind of Welding Structure can also reduce stress corrosion effectively, increases the service life of cooler.

accompanying drawing explanation:

Fig. 1 is the utility model pipe and tube plate welding structure schematic diagram;

the specific embodiment:

With reference to Fig. 1, a kind of structure of the tube-to-tube sheet connection welding method that reduces residual stress, around the mouth of pipe of tube sheet 3, open an annular groove 2, by expanded joint, pipe 1 and tube sheet 3 are close together again, tube sheet 3 is flushed with pipe 1, finally use without the argon arc welding of filling metal pipe 1 and tube sheet 3 are welded.

Specific embodiment: before welding, around the mouth of pipe of tube sheet 3, open an annular groove 2 apart from the position of mouth of pipe 0.5mm<b<2mm, as shown in the figure, groove width is 0.5mm<c<2mm, 0.5mm<d<2mm, the pipe that is 0.5mm<a<2mm by expanded joint by pipe thickness again 1 is close together with tube sheet 3, tube sheet 3 is flushed with pipe 1, finally use without the argon arc welding of filling metal pipe 1 and tube sheet 3 are welded.

Claims (1)

1. one kind can be reduced the structure of the tube-to-tube sheet connection welding method of residual stress, it is characterized in that: around the mouth of pipe of tube sheet, open an annular groove, by expanded joint, pipe and tube sheet are close together again, tube sheet is flushed with pipe, finally use without the argon arc welding of filling metal tube-to-tube sheet connection is welded.
CN201420065456.1U 2014-02-14 2014-02-14 Structure capable of reducing residual stress and used for a tube and tube plate welding method CN203679502U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420065456.1U CN203679502U (en) 2014-02-14 2014-02-14 Structure capable of reducing residual stress and used for a tube and tube plate welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420065456.1U CN203679502U (en) 2014-02-14 2014-02-14 Structure capable of reducing residual stress and used for a tube and tube plate welding method

Publications (1)

Publication Number Publication Date
CN203679502U true CN203679502U (en) 2014-07-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420065456.1U CN203679502U (en) 2014-02-14 2014-02-14 Structure capable of reducing residual stress and used for a tube and tube plate welding method

Country Status (1)

Country Link
CN (1) CN203679502U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103769726A (en) * 2014-02-14 2014-05-07 中国船舶重工集团公司第七�三研究所 Tube and tube plate welding structure capable of reducing residual stress
CN104384883A (en) * 2014-11-19 2015-03-04 柳州凯通机械有限公司 Cooler tube plate processing method
CN104439639A (en) * 2014-11-19 2015-03-25 柳州凯通机械有限公司 Cooler tube plate and cooling tube welding method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103769726A (en) * 2014-02-14 2014-05-07 中国船舶重工集团公司第七�三研究所 Tube and tube plate welding structure capable of reducing residual stress
CN104384883A (en) * 2014-11-19 2015-03-04 柳州凯通机械有限公司 Cooler tube plate processing method
CN104439639A (en) * 2014-11-19 2015-03-25 柳州凯通机械有限公司 Cooler tube plate and cooling tube welding method

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140702

Termination date: 20150214

EXPY Termination of patent right or utility model