CN101126473A - Metal pipe and shape memory alloy pipe joint connection method - Google Patents
Metal pipe and shape memory alloy pipe joint connection method Download PDFInfo
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- CN101126473A CN101126473A CNA2007100702574A CN200710070257A CN101126473A CN 101126473 A CN101126473 A CN 101126473A CN A2007100702574 A CNA2007100702574 A CN A2007100702574A CN 200710070257 A CN200710070257 A CN 200710070257A CN 101126473 A CN101126473 A CN 101126473A
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- pipe joint
- marmem pipe
- bulge loop
- marmem
- memory alloy
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Abstract
The invention relates to a method to connect the metal pipe with a shape memory alloy pipe joint, which includes the following steps: 1) the processing of annular bulge: an annular bulge with the width of 1-10mm and the height of 0.5-5mm shall be made along the outer ring of the metal pipe which has certain rigidity, the bulge shall be 3-15mm from the pipe end; 2) assembly: the metal pipe is inserted into the shape memory alloy pipe joint, the fit clearance between the outer diameter of the annular bulge and the inner diameter of the shape memory alloy pipe joint shall be +0.3-+1.0mm; 3) heating: using a high frequency heating equipment to heat the shape memory alloy pipe joint to 100-600 degrees centigrade rapidly, then the shape memory alloy pipe joint will have a memory effect of radial reduction and closely hold the annular bulge near the end of the metal pipe to ensure the sealing effect, also the form memory effect of the shape memory alloy pipe joint is utilized to keep the long-term sealing effect. The invention has the advantages of rapid installation of the pipe, high connecting strength and reliable sealing property.
Description
Technical field
The present invention relates to a kind of connecting means of pipeline, refer in particular to the connecting means of a kind of metal tube and marmem pipe joint.
Background technique
Pipe connecting method commonly used is that welding (electric welding, oxy-acetylene welding, argon arc welding), bonding or mechanical compaction (by mechanical whorl etc.) rubber seal connects.The shortcoming of welding method is an inconvenient operation, and when actual welding, owing to there is naked light, therefore the post training to place environment, ventilation, safety and operator around the welding all has strict requirement, and especially is not suitable for the connection between the foreign material; The shortcoming of adhering method is that join strength is low, and sealing is poor; The shortcoming of mechanical compaction rubber seal connecting means is influenced by extraneous factor such as impact, vibration, corrosion etc., and along with the variation of time causes the decreased performance that connects, mechanical compaction is loosening, rubber seal is aging easily, produce pipeline seepage phenomenon, and its used part is many, it is big to take up space.
Chinese patent once disclosed some memory alloy pipe joint and production methods thereof, as " closed electrostatic storage tube joint " (CN2116140U, September 16 1992 day for announcing), " iron-base marmem pipe road jointing and production method thereof " (VN1026502C, November 9 1994 day for announcing), " manufacture method of iron-base marmem pipe joint " (CN1055322C, August 9 2000 day for announcing), " marmem pipe joint " (CN2596155Y, but they do not relate to the connecting means of common metal tubing and memory alloy pipe joint December 31 2003 day for announcing) etc..
Summary of the invention
In order to overcome the deficiency of existing pipe connecting method, the invention provides the connecting means of a kind of metal tube and marmem pipe joint, piping erection speed is fast, the join strength height, sealability is reliable.
The technical solution used in the present invention is: the connecting means of a kind of metal tube and marmem pipe joint comprises the steps:
1) roll bulge loop: will have the port limit 3mm～15mm place of the metal tube of certain rigidity to make one and enclose the radially bulge loop of evagination, the width of bulge loop is 1mm～10mm, and protrusion height is 0.5mm～5mm;
2) assembling: in the described metal tube inserted-shape of step 1) memory alloy pipe joint, the matching gap of bulge loop external diameter and marmem pipe joint internal diameter for+0.30mm～+ 1.00mm is advisable;
3) heat: after with the high-frequency electrical heating plant marmem pipe joint being warmed to 100 ℃～600 ℃ rapidly, the memory effect that distortion is radially dwindled in the marmem pipe joint generation, the bulge loop of metal tube port tightly embraced guarantee sealing, and the shape memory effect that utilizes marmem pipe to connect is guaranteed long-term sealing.
Metal tube of the present invention as long as it has certain rigidity, just can connect with this method.Marmem pipe joint of the present invention as long as it has shape memory effect, just can be used for this method.
The good effect that the present invention produces is: the installation rate of pipeline is fast, makes a radial convex loop with regard to the available mouthful slot rolling device that rises in several minutes, and transient heating in the inserted-shape memory alloy pipe joint with regard to salable connection, has improved the efficient of installment work greatly; Belong to firmly and be tightly connected, do not have rubber, plastic seal ring, do not have problem of aging, the join strength height, sealability is reliable; Do not need the auxilliary material of welding such as other welding rod, scolder during installation, drop into still less, more convenient; And can prevent that pipeline from causing moving axially the seepage that causes because of difference variation.
Description of drawings
Fig. 1 rolls the bulge loop schematic representation.
Fig. 2 is the change in shape schematic representation of memory alloy pipe joint before and after heating.
Fig. 3 is a connection design sketch of the present invention.
Among the figure: 1, metal tube (as carbon steel tube, brass tube etc.), 2, marmem pipe joint (as iron-base marmem pipe joint, copper-based shape memory alloy pipe joint, TiNiNb memory alloy pipe joint etc.), 3, bulge loop.
Embodiment
Embodiment one:
The 5mm place, port limit of carbon steel tube is made one with the special-purpose mouthful slot rolling device that rises enclose the radially bulge loop of evagination, the width of bulge loop is 2mm, protrusion height is 0.5mm, with the matching gap of marmem pipe joint be+0.3mm, after with the high-frequency electrical heating plant pipe joint being warmed to 300 ℃ rapidly, the mean inside diameter amount of deformation 30.5% of marmem pipe joint, shape recovery ratio is 51.2%, needs the power of 2.55T just carbon steel tube and the marmem pipe joint that connects to be drawn back on material testing machine.
Embodiment two:
The 5mm place, port limit of carbon steel tube is made one with the special-purpose mouthful slot rolling device that rises enclose the radially bulge loop of evagination, the width of bulge loop is 2.5mm, protrusion height is 0.8mm, with the matching gap of marmem pipe joint be+0.15mm, after with the high-frequency electrical heating plant marmem pipe joint being warmed to 300 ℃ rapidly, the mean inside diameter amount of deformation 28.8% of marmem pipe joint, shape recovery ratio are 48.6%, and the pressure that can bear 5MPa does not leak.
Embodiment three:
The 6mm place, port limit of brass tube is made one with the special-purpose mouthful slot rolling device that rises enclose the radially bulge loop of evagination, the width of bulge loop is 2.2mm, protrusion height is 0.8mm, with the matching gap of marmem pipe joint be+0.20mm, after with the high-frequency electrical heating plant marmem pipe joint being warmed to 280 ℃ rapidly, the mean inside diameter amount of deformation 30.2% of marmem pipe joint, shape recovery ratio are 42.1%, and the pressure that can bear 2MPa does not leak.
Claims (4)
1. the connecting means of metal tube and marmem pipe joint is characterized in that: comprise the steps:
1) roll bulge loop: will have the port limit 3mm～15mm place of the metal tube of certain rigidity to make one and enclose the radially bulge loop of evagination, the width of bulge loop is 1mm～10mm, and protrusion height is 0.5mm～5mm;
2) assembling: in the described metal tube inserted-shape of step 1) memory alloy pipe joint, the matching gap of bulge loop external diameter and marmem pipe joint internal diameter for+0.30mm～+ 1.00mm is advisable;
3) heat: after with the high-frequency electrical heating plant marmem pipe joint being warmed to 100 ℃～600 ℃ rapidly, the memory effect that distortion is radially dwindled in the marmem pipe joint generation, the bulge loop of metal tube port tightly embraced guarantee sealing, and the shape memory effect that utilizes marmem pipe to connect is guaranteed long-term sealing.
2. the connecting means of metal tube according to claim 1 and marmem pipe joint, it is characterized in that: the 5mm place, port limit of carbon steel tube is made one with the special-purpose mouthful slot rolling device that rises enclose the radially bulge loop of evagination, the width of bulge loop is 2mm, protrusion height is 0.5mm, with the matching gap of marmem pipe joint be+0.3mm, after with the high-frequency electrical heating plant pipe joint being warmed to 300 ℃ rapidly, the mean inside diameter amount of deformation 30.5% of marmem pipe joint, shape recovery ratio is 51.2%, needs the power of 2.55T just carbon steel tube and the marmem pipe joint that connects to be drawn back on material testing machine.
3. the connecting means of metal tube according to claim 1 and marmem pipe joint, it is characterized in that: the 5mm place, port limit of carbon steel tube is made one with the special-purpose mouthful slot rolling device that rises enclose the radially bulge loop of evagination, the width of bulge loop is 2.5mm, protrusion height is 0.8mm, with the matching gap of marmem pipe joint be+0.15mm, after with the high-frequency electrical heating plant marmem pipe joint being warmed to 300 ℃ rapidly, the mean inside diameter amount of deformation 28.8% of marmem pipe joint, shape recovery ratio is 48.6%, and the pressure that can bear 5MPa does not leak.
4. the connecting means of metal tube according to claim 1 and marmem pipe joint, it is characterized in that: the 6mm place, port limit of brass tube is made one with the special-purpose mouthful slot rolling device that rises enclose the radially bulge loop of evagination, the width of bulge loop is 2.2mm, protrusion height is 0.8mm, with the matching gap of marmem pipe joint be+0.20mm, after with the high-frequency electrical heating plant marmem pipe joint being warmed to 280 ℃ rapidly, the mean inside diameter amount of deformation 30.2% of marmem pipe joint, shape recovery ratio is 42.1%, and the pressure that can bear 2MPa does not leak.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100702574A CN101126473A (en) | 2007-07-30 | 2007-07-30 | Metal pipe and shape memory alloy pipe joint connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100702574A CN101126473A (en) | 2007-07-30 | 2007-07-30 | Metal pipe and shape memory alloy pipe joint connection method |
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| CN101126473A true CN101126473A (en) | 2008-02-20 |
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| CNA2007100702574A Pending CN101126473A (en) | 2007-07-30 | 2007-07-30 | Metal pipe and shape memory alloy pipe joint connection method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861086A (en) * | 2009-04-06 | 2010-10-13 | 国际商业机器公司 | Be used to form the apparatus and method that mechanical seal connects |
| CN101922591A (en) * | 2010-08-24 | 2010-12-22 | 哈尔滨工业大学 | Shape memory polymer pipeline and use of shape memory polymer pipeline as aircraft engine intake |
| CN102686928A (en) * | 2009-11-16 | 2012-09-19 | 3M创新有限公司 | Pipe section joining |
| CN103817642A (en) * | 2012-11-16 | 2014-05-28 | 哈尔滨飞机工业集团有限责任公司 | Memory alloy joint connecting method and auxiliary tool thereof |
| US8763231B2 (en) | 2009-04-10 | 2014-07-01 | 3M Innovative Properties Company | Blind fasteners |
| CN105666037A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Assembly method of shape memory alloy pipe connector used for aircraft hydraulic system |
| US9422964B2 (en) | 2009-04-10 | 2016-08-23 | 3M Innovative Properties Company | Blind fasteners |
| CN106198371A (en) * | 2016-07-12 | 2016-12-07 | 中国人民解放军第五七九工厂 | A kind of new type rubber oil resistant test device |
| CN106439293B (en) * | 2016-09-28 | 2018-12-07 | 有研亿金新材料有限公司 | A kind of external-expanding type interface unit and application |
| CN113530933A (en) * | 2021-07-09 | 2021-10-22 | 北京航空航天大学 | Shape memory composite material connecting device |
-
2007
- 2007-07-30 CN CNA2007100702574A patent/CN101126473A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861086A (en) * | 2009-04-06 | 2010-10-13 | 国际商业机器公司 | Be used to form the apparatus and method that mechanical seal connects |
| US8763231B2 (en) | 2009-04-10 | 2014-07-01 | 3M Innovative Properties Company | Blind fasteners |
| US9422964B2 (en) | 2009-04-10 | 2016-08-23 | 3M Innovative Properties Company | Blind fasteners |
| CN102686928B (en) * | 2009-11-16 | 2016-03-23 | 3M创新有限公司 | Pipe section engages |
| US8870236B2 (en) | 2009-11-16 | 2014-10-28 | 3M Innovative Properties Company | Pipe section joining |
| CN102686928A (en) * | 2009-11-16 | 2012-09-19 | 3M创新有限公司 | Pipe section joining |
| CN101922591A (en) * | 2010-08-24 | 2010-12-22 | 哈尔滨工业大学 | Shape memory polymer pipeline and use of shape memory polymer pipeline as aircraft engine intake |
| CN103817642A (en) * | 2012-11-16 | 2014-05-28 | 哈尔滨飞机工业集团有限责任公司 | Memory alloy joint connecting method and auxiliary tool thereof |
| CN103817642B (en) * | 2012-11-16 | 2016-06-22 | 哈尔滨飞机工业集团有限责任公司 | The method connected for memorial alloy joint and aid thereof |
| CN105666037A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Assembly method of shape memory alloy pipe connector used for aircraft hydraulic system |
| CN106198371A (en) * | 2016-07-12 | 2016-12-07 | 中国人民解放军第五七九工厂 | A kind of new type rubber oil resistant test device |
| CN106439293B (en) * | 2016-09-28 | 2018-12-07 | 有研亿金新材料有限公司 | A kind of external-expanding type interface unit and application |
| CN113530933A (en) * | 2021-07-09 | 2021-10-22 | 北京航空航天大学 | Shape memory composite material connecting device |
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