CN103084455A - Corrugated pipe one-step molding processing method - Google Patents
Corrugated pipe one-step molding processing method Download PDFInfo
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- CN103084455A CN103084455A CN2013100517422A CN201310051742A CN103084455A CN 103084455 A CN103084455 A CN 103084455A CN 2013100517422 A CN2013100517422 A CN 2013100517422A CN 201310051742 A CN201310051742 A CN 201310051742A CN 103084455 A CN103084455 A CN 103084455A
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- bellows
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- corrugated pipe
- corrugated
- joint
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Abstract
The invention relates to a corrugated pipe one-step molding processing method. The corrugated pipe one-step molding processing method comprises the following steps: a corrugated section of a corrugated pipe body is processed into a corrugated shape through a corrugation squeezing machine device; and a corrugated pipe joint is processed through a mould, a joint molding transition section needs to be reserved in the middle of the corrugated pipe joint. Corrugated pipes processed by the corrugated pipe one-step molding processing method have the advantages of being secure and reliable, free of leakage points, and long in service life.
Description
Technical field
The present invention relates to a kind of efficient heat-exchanging pipe, relate in particular to a kind of bellows one-shot forming processing method.
Background technology
The corrugated heat exchanger tube of existing thin-wall stainless steel, the corrugated tube construction package is seen Fig. 1, it is to be processed through corrugation forcing-out device equipment by the materials in the tube that wall thickness is 0.8-1.0mm, make the heat exchange tube wall form projection one by one, and through with the pipe joint of its welding, carry out intensity with tube sheet and be welded that (thickness of pipe joint is 2.5～3mm).Bellows adopts unique processing technology of free forming, and the characteristics of this technique are: forming process does not have the mould restriction, without the metal imposed deformation, can not cause stress to concentrate, and residual stress is little, there is no the intergranular shortcoming, also just can not cause stress corrosion.The stainless steel good corrosion resistance, can not pollute medium in addition.But because the thickness of bellows and pipe joint differs larger, when both weld, employing is carried out chamfered edge in thick short tube side, cut out backing plate, insert in bellows, joint geometry is seen Fig. 2, although guaranteed like this axiality after pipe joint and bellows-welding, but can only detect by the water pressure test the quality with weld seam, the quality of weld seam can not get good assurance, makes the hidden danger of the existence leakage in service of equipment.
Summary of the invention
Purpose of the present invention for overcoming defects, is designed a kind of bellows one-shot forming, and the processing method of safety and reliability reduces bellows and has leakage point.
For achieving the above object, adopt following method, a kind of bellows one-shot forming processing method comprises that following step: A, bellows body bellows segment are processed into bellows-shaped through corrugation forcing-out device equipment; B, by the Mould Machining corrugated pipe connector, joint moulding changeover portion need be left in the centre.
The crest external diameter of described bellows body bellows segment is than the little 0.2mm～0.5mm of tube sheet pore diameter.
Described bellows two ends corrugated pipe connector length is that tube plate thickness adds 10mm.
The length of described joint moulding changeover portion is 10mm-15mm.
Tube sheet: get out the hole equally slightly larger than tube outer diameter on steel plate, pipe is penetrated weldering live to fix, play a kind of accessory of effect like this.
The pipe joint at original bellows two ends is removed, and one-shaping technique is adopted at the two ends of bellows, makes the external diameter at bellows two ends satisfy the requirement of tube sheet pore.
The invention has the beneficial effects as follows: the technology of the present invention is bellows two ends one-shaping techniques, and making bellows is a homogeneous tube, does not have the splicing of bellows, the leakage point of effectively having avoided equipment to be in operation and to exist.Former bellows form adopts bellows and pipe joint welded structure, the weld seam of joint, difference due to welding procedure and solder technology level, weldquality not necessarily can be guaranteed, detection for weld seam can only be done the water pressure test, can't carry out ray detection by the requirement of GB151, can't find in advance at the cracking of joint weld.As equipment, 500 bellowss are arranged, adopt so original bellows form, virtually just increased by 1000 leak sources, affected the safe operation of equipment.
Employing bellows two ends tube head one-shaping technique, the bellows after moulding is a homogeneous tube, and the external diameter of two ends tube head is identical with the crest height of bellows, and just there are not two leak sources in original form in the bellows after moulding.And because the wall thickness of bellows is thinner, can adopt expanded joint to add Type of Welding with being connected of tube sheet, can better guarantee the quality of connection of bellows and tube sheet.Bellows as φ 25/ φ 32, the full-size at crest place is φ 32mm, we at the outside diameter tolerance of the process medium wave peak of actual moulding are-0.2mm～-0.5mm, the external diameter of two ends tube head guarantees that by mould the external diameter after moulding is φ 32mm, and the centre-to-centre spacing that can guarantee like this bellows meets the requirement in GB151.When needs are changed bellows, whole bellows can be extracted out and change.We find in the application of reality, adopt the one-time formed bellows of two ends tube head than the bellows that adopts the pipe joint welding and have longer service life.
Figure of description
Fig. 1, prior art have the bellows structure schematic diagram of welded stub connection.
Fig. 2, prior art have the local enlarged diagram of bellows of welded stub connection.
Fig. 3, the one-time formed bellows structure schematic diagram of the present invention.
In figure: icon 1, bellows body bellows segment; Icon 2, corrugated pipe connector; Icon 3, joint moulding changeover portion.
The specific embodiment
A kind of bellows one-shot forming processing method comprises that following step: A, bellows body bellows segment 1 are processed into bellows-shaped through corrugation forcing-out device equipment; B, by Mould Machining corrugated pipe connector 2, joint moulding changeover portion 3 need be left in the centre.
The crest external diameter of described bellows body bellows segment is than the little 0.3mm of tube sheet pore diameter.
Described bellows two ends corrugated pipe connector length is that tube plate thickness adds 10mm.
The length of described joint moulding changeover portion is 12mm.
Claims (4)
1. bellows one-shot forming processing method is characterized in that comprising following step:
A, bellows body bellows segment are processed into bellows-shaped through corrugation forcing-out device equipment;
B, by the Mould Machining corrugated pipe connector, joint moulding changeover portion need be left in the centre.
2. a kind of bellows one-shot forming processing method according to claim 1, is characterized in that the crest external diameter of described bellows body bellows segment is than the little 0.2mm～0.5mm of tube sheet pore diameter.
3. a kind of bellows one-shot forming processing method according to claim 1 is characterized in that described bellows two ends corrugated pipe connector length is that tube plate thickness adds 10mm.
4. a kind of bellows one-shot forming processing method according to claim 1, the length that it is characterized in that described joint moulding changeover portion is 10mm-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100517422A CN103084455A (en) | 2013-02-17 | 2013-02-17 | Corrugated pipe one-step molding processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100517422A CN103084455A (en) | 2013-02-17 | 2013-02-17 | Corrugated pipe one-step molding processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103084455A true CN103084455A (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100517422A Pending CN103084455A (en) | 2013-02-17 | 2013-02-17 | Corrugated pipe one-step molding processing method |
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| CN (1) | CN103084455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878978A (en) * | 2015-05-30 | 2015-09-02 | 佛山市耀龙金属有限公司 | Metal pipe and machining device thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2306605A (en) * | 1995-11-02 | 1997-05-07 | Draftex Ind Ltd | Longitudinally flexible pipe |
| US6041825A (en) * | 1996-03-07 | 2000-03-28 | Gutter World, Inc. | Repositionable flexible downspout extension |
| CN2495881Y (en) * | 2001-08-09 | 2002-06-19 | 杭州电子工业学院 | Stainless steel corrugated soft pipe for gas burner |
| CN2793493Y (en) * | 2005-05-12 | 2006-07-05 | 吴文庆 | Integrated metal flexible pipe with variable diameter |
| CN2888223Y (en) * | 2006-05-15 | 2007-04-11 | 浙江盾安精工集团有限公司 | Connection tube for split type air conditioner |
| CN201202902Y (en) * | 2008-04-30 | 2009-03-04 | 黄伟 | Integral non-welding corrugated metal soft connecting part |
| EP2101095A2 (en) * | 2008-03-12 | 2009-09-16 | Rehau Ag + Co | Corrugated plastic tube for coating at least one exhaust gas sensor cable |
| KR20100025733A (en) * | 2008-08-28 | 2010-03-10 | 안정복 | A plastic pipe mixed corrugated pipe and straight pipe |
-
2013
- 2013-02-17 CN CN2013100517422A patent/CN103084455A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2306605A (en) * | 1995-11-02 | 1997-05-07 | Draftex Ind Ltd | Longitudinally flexible pipe |
| US6041825A (en) * | 1996-03-07 | 2000-03-28 | Gutter World, Inc. | Repositionable flexible downspout extension |
| CN2495881Y (en) * | 2001-08-09 | 2002-06-19 | 杭州电子工业学院 | Stainless steel corrugated soft pipe for gas burner |
| CN2793493Y (en) * | 2005-05-12 | 2006-07-05 | 吴文庆 | Integrated metal flexible pipe with variable diameter |
| CN2888223Y (en) * | 2006-05-15 | 2007-04-11 | 浙江盾安精工集团有限公司 | Connection tube for split type air conditioner |
| EP2101095A2 (en) * | 2008-03-12 | 2009-09-16 | Rehau Ag + Co | Corrugated plastic tube for coating at least one exhaust gas sensor cable |
| CN201202902Y (en) * | 2008-04-30 | 2009-03-04 | 黄伟 | Integral non-welding corrugated metal soft connecting part |
| KR20100025733A (en) * | 2008-08-28 | 2010-03-10 | 안정복 | A plastic pipe mixed corrugated pipe and straight pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878978A (en) * | 2015-05-30 | 2015-09-02 | 佛山市耀龙金属有限公司 | Metal pipe and machining device thereof |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130508 |