CN105215332A - The preparation method of a kind of cooling reducing is seamless full helical corrugation metal connecting tube - Google Patents
The preparation method of a kind of cooling reducing is seamless full helical corrugation metal connecting tube Download PDFInfo
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- CN105215332A CN105215332A CN201510538409.3A CN201510538409A CN105215332A CN 105215332 A CN105215332 A CN 105215332A CN 201510538409 A CN201510538409 A CN 201510538409A CN 105215332 A CN105215332 A CN 105215332A
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Abstract
The invention provides the preparation method of the seamless full helical corrugation metal connecting tube of a kind of cooling reducing, 1) crude green body preparation; 2) acid corrosion process: 3) mechanical grinding: 4) centrifugal casting technique: 5) mechanical performance sizing: the full helical corrugation metal tube 6) taking out step 5), rinse well with water at normal temperatures, put into drying frame and carry out drying, namely can be made into the seamless full helical corrugation metal connecting tube of reducing.Present invention process flow process is simple, the full helical corrugation metal connecting tube made have anticorrosive, not easily leak, flexible characteristic.
Description
Technical field
The present invention relates to a kind of metal connecting tube, particularly the preparation method of the seamless full helical corrugation metal connecting tube of a kind of cooling reducing.
Background technology
Air conditioner room unit realizes system with outdoor unit by air-conditioning and cooling seamless copper pipe and is connected.Existing typical connecting pipe structure formula is air-conditioning and cooling seamless copper pipe, Large Diameter Pipeline (mainly 12.7mm and above diameter) copper pipe structure bending strength is low, installing as air conditioner connecting pipe yielding when winding displacement bends and then reduce the flow of refrigerant in pipe.Existing welding reducing tube connector and different (s) the footpath double end tube connector application of entirety in current air-conditioning and refrigeration industry, this anatomical connectivity pipe effectively overcomes the shortcoming and defect of original tube connector, and tool improves significantly.But welding reducing tube connector joint has leakage hidden danger, the oxide skin that after welding, pipe internal surface produces and welding slag are not easily removed, the easily blocking refrigeration system that comes off under the washing away for a long time of refrigerant causes equipment fault, and with overall different (s) footpath double end tube connector or complex process or tube fluid cross section is less than normal or the bending point not enough situation such as restricted.
Summary of the invention
The object of the invention is to develop the deficiency of the present invention mainly for existing air-conditioning and cooling tube connector technology, the preparation method of the seamless full helical corrugation metal connecting tube of a kind of cooling reducing is provided, without revealing hidden danger, technological process is short, manufacture simple, full helical corrugation main leg can manage the seamless full helical corrugation metal connecting tube of the constant reducing in interior cross section in the bending of any position.
Concrete scheme is: the preparation method of a kind of cooling reducing is seamless full helical corrugation metal connecting tube, is characterized in that, comprise following steps:
1) crude green body preparation: with 19.05 × 0.8mm Cu-Al bimetal composite straight pipe for matrix, along matrix main leg outer wall spinning 3 full helical corrugations, spiral groove depth 1.8 ~ 2.4mm, helicla flute spacing 7.5 ~ 8.5mm, helical angle 25 ° ~ 35 °, again by matrix undergauge section spinning transition arc 8 ~ 10mm, transition arc is to tube end diameter 15.83 ~ 15.93mm; Make the full helical corrugation metal tube of crude green body;
2) acid corrosion process: the base of above-mentioned preparation is placed on acid solution and soaks taking-up after 4 ~ 5 hours, by a large amount of clean water, the water after cleaning reclaims;
3) mechanical grinding: the burr adopting mechanical frosted process crude green body;
4) centrifugal casting technique: by vertical centrifugal pouring technology, within it one deck GH4742 alloy-layer poured into a mould by wall,
5) mechanical performance sizing: by the full helical corrugation metal tube after step 4) process, at normal temperatures, mixing with water with the river sand about 50 orders pours in tube chamber, then populated full helical corrugation metal tube is put into refrigerator-freezer, under subzero 15 degree Celsius, carry out freezing processing 2 ~ 3 hours, residual moisture in pipe is fully frozen and freezes reality;
6) take out the full helical corrugation metal tube of step 5), rinse well with water at normal temperatures, put into drying frame and carry out drying, namely can be made into the seamless full helical corrugation metal connecting tube of reducing.
Preparation method as above, 19.05 × 0.8mm Cu-Al bimetal composite straight pipe in described step 1) adopt TU0 TU1 TU2 TP1 TP2 T2:1050 1060 3003 3A21 be that the ratio of 70 ~ 75:25 ~ 30 is made.
Preparation method as above, described step 2) acid solution according to nitric acid: acetic acid: water is (3 ~ 5): (8 ~ 15): the ratio preparation of 100.
Preparation method as above, described reducing is seamless full helical corrugation metal connecting tube it be made up of pipe end, undergauge section, full helical corrugation main leg three part, pipeline section is axial isometrical " S " shape inside spin corrugated metal rib structure, and undergauge Duan Weiquan helical corrugation supervisor two ends undergauge section is dwindled into gradually by undergauge and requires pipe end.
Preparation method as above, described a kind of air-conditioning and the seamless full helical corrugation metal connecting tube spiral metal rib of cooling reducing are characterised in that: the metal ribs number of full helical corrugation metal connecting tube is 1 ~ 10, spiral angle 15 ~ 75 °, helical corrugation groove depth 0.5 ~ 10mm, separation 1 ~ 20mm.
Preparation method as above, described pipe end external diameter 6 ~ 42mm, undergauge section transition arc 3 ~ 35mm, full helical corrugation main leg external diameter 8 ~ 65mm.
Preparation method as above, described full helical corrugation metal connecting tube total length 1000 ~ 15000mm, pipe end length 50 ~ 500mm, undergauge segment length 2 ~ 40mm.
Preparation method as above, the pouring technology of described step 4) is:
The first step, preparation work: open centrifugal casting machine, arrange rotation revolution, calculates pour steel amount, and control poring rate at 3kg/s-5kg/s, the duration of pouring is 3s-5s;
Second step, after the first step completes, temperature control to 200 DEG C, drenches and hands over one deck glass fiber reinforced plastic water, and control poring rate at 1kg/s-3kg/s, the duration of pouring is 1s-3s;
3rd step, after second step completes, temperature control to 400 DEG C-500 DEG C, second pouring one deck molten steel, control poring rate at 5kg/s-8kg/s, the duration of pouring is 5s-8s;
4th step, cooling and demolding: centrifugal casting machine keeps duty, to molten steel cools, closes centrifugal casting machine, the demoulding after centrifugal casting machine stops operating.
Because the wall footpath of full helical corrugation metal tube is thicker, traditional mechanical grinding is adopted to be difficult to control the reduction in wall footpath, and the thicker full helical corrugation metal tube in wall footpath is almost nonelastic, easily folding line is formed during bending, number of times is more will produce leak source in bending, do not affect the mechanical performance of full helical corrugation metal tube to solve its elastic problem, the present invention adopts acid corrosion treatment process.Require in solution corrosion, vertical centrifugal pouring technology is adopted to pour into a mould one deck GH4742 alloy-layer, GH4742 alloy-layer has good anticorrosive function, and adopts vertical centrifugal pouring technology mainly to consider not affect full helical corrugation metal tube wall footpath and influence elastane.
Step 5) process mainly carries out machinery sizing to the full helical corrugation metal tube details place formed, and is easy to detect it and whether there is leak source after sizing.Its principle is: combined dexterously, organically by husky water composite material, carry out freezing processing, utilize the physical characteristic of water, water has freezing and expansion principle in subzero, can, by short space between sand through the icing solidification of water and expansion, loose sand be closely linked; Simultaneously due to the expansion of ice, pipe inner stuffing is more closely knit, and rigidity increases, and therefore when bending pipes, non-deformability strengthens, thus ensure that large change does not occur the internal diameter size of tubing.
The priority of this process is: at economic aspect, water and sand cost very low, and recyclable recycling, therefore compared with other inserts, its cost can be ignored.Fairly simple in operating procedure, can not cause environmental pollution in addition, this process is applicable to single-piece and production in enormous quantities.
Present invention process flow process is simple, the full helical corrugation metal connecting tube made have anticorrosive, not easily leak, flexible characteristic.
figure of description
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated.
A preparation method for cooling reducing is seamless full helical corrugation metal connecting tube, comprises following steps:
1) crude green body preparation: with 19.05 × 0.8mm Cu-Al bimetal composite straight pipe for matrix, along matrix main leg outer wall spinning 3 full helical corrugations, spiral groove depth 1.8 ~ 2.4mm, helicla flute spacing 7.5 ~ 8.5mm, helical angle 25 ° ~ 35 °, again by matrix undergauge section spinning transition arc 8 ~ 10mm, transition arc is to tube end diameter 15.83 ~ 15.93mm; Make the full helical corrugation metal tube of crude green body;
2) acid corrosion process: the base of above-mentioned preparation is placed on acid solution and soaks taking-up after 4 ~ 5 hours, by a large amount of clean water, the water after cleaning reclaims;
3) mechanical grinding: the burr adopting mechanical frosted process crude green body;
4) centrifugal casting technique: by vertical centrifugal pouring technology, within it one deck GH4742 alloy-layer poured into a mould by wall,
5) mechanical performance sizing: by the full helical corrugation metal tube after step 4) process, at normal temperatures, mixing with water with the river sand about 50 orders pours in tube chamber, then populated full helical corrugation metal tube is put into refrigerator-freezer, under subzero 15 degree Celsius, carry out freezing processing 2 ~ 3 hours, residual moisture in pipe is fully frozen and freezes reality;
6) take out the full helical corrugation metal tube of step 5), rinse well with water at normal temperatures, put into drying frame and carry out drying, namely can be made into the seamless full helical corrugation metal connecting tube of reducing.
Preparation method as above, 19.05 × 0.8mm Cu-Al bimetal composite straight pipe in described step 1) adopt TU0 TU1 TU2 TP1 TP2 T2:1050 1060 3003 3A21 be that the ratio of 70 ~ 75:25 ~ 30 is made.
Preparation method as above, the pouring technology of described step 4) is:
The first step, preparation work: open centrifugal casting machine, arrange rotation revolution, calculates pour steel amount, and control poring rate at 3kg/s-5kg/s, the duration of pouring is 3s-5s;
Second step, after the first step completes, temperature control to 200 DEG C, drenches and hands over one deck glass fiber reinforced plastic water, and control poring rate at 1kg/s-3kg/s, the duration of pouring is 1s-3s;
3rd step, after second step completes, temperature control to 400 DEG C-500 DEG C, second pouring one deck molten steel, control poring rate at 5kg/s-8kg/s, the duration of pouring is 5s-8s;
4th step, cooling and demolding: centrifugal casting machine keeps duty, to molten steel cools, closes centrifugal casting machine, the demoulding after centrifugal casting machine stops operating.
Preparation method as above, described step 2) acid solution according to nitric acid: acetic acid: water is (3 ~ 5): (8 ~ 15): the ratio preparation of 100.
With reference to Fig. 1, the reducing prepared under the present invention is seamless full helical corrugation metal connecting tube, it is made up of pipe end 1, undergauge section 2, full helical corrugation main leg 3 three part.Described full helical corrugation main leg 3 part is axial isometrical " S " shape inside spin corrugated metal rib structure, and undergauge section 2 part requires pipe end 1 for supervisor two ends light pipe section is dwindled into gradually by undergauge.Its improvements are seamless full helical corrugation, structure is simple, technological process is short, no-welding-seam, has good action of turbulent flow, and liquid resistance is little, after metal tube is bending, tube fluid cross section is unaffected, go for the bending of any position, the air-conditioning met in length range is installed, and greatly improves the convenience of air-conditioning serviceability and installation.
Materials'use copper pipe (copper content more than 99.0% in said structure, as TU0 TU1 TU2 TP1 TP2 the alloy designations such as T2), aluminum pipe (1 series, 3 series, as 1050,1060,3003, the alloy designations such as 3A21), Cu-Al bimetal multiple tube, stainless steel tube alloy designations such as (304) 316L; The tube wall thickness tolerance of pipe end 1, undergauge section 2, full helical corrugation main leg 3 part all can meet GB and relevant criterion requirement, and wall thickness range is 0.3 ~ 1.2mm.Metal ribs is: number 1 ~ 10, spiral angle 15 ~ 75 degree, helical corrugation groove depth 0.5 ~ 10mm, separation 1 ~ 20mm.External diameter is: pipe end 1 external diameter 6 ~ 42mm, undergauge section 2 transition arc 3 ~ 35mm, full helical corrugation main leg 3 external diameter 8 ~ 65mm.Length is: length range 1000 ~ 15000mm, pipe end 1 length 50 ~ 500mm, undergauge section 2 length 2 ~ 40mm.
Reducing prepared by the present invention is seamless, and full helical corrugation metal connecting tube possesses following good effect:
1, the flexible main drive tube that significantly improves of pipeline section 3 any part is to non-deformability, greatly improves axially flexible performance, and the air-conditioning met in length range is installed, and greatly improves the convenience of air-conditioning serviceability and installation.
2, adopt twice undergauge, liquid resistance is less than double end corrugated connecting tube, and full helical corrugation supervisor action of turbulent flow is obvious, is conducive to the stability improving system cloud gray model;
3, the bending rear tube fluid cross section of pipeline section 2 is unaffected;
4, welding reveals hidden danger, without the hidden danger blocking air-conditioning and refrigeration system;
5, technological process is short, manufactures simple.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (8)
1. a preparation method for the seamless full helical corrugation metal connecting tube of cooling reducing, is characterized in that, comprise following steps:
1) crude green body preparation: with 19.05 × 0.8mm Cu-Al bimetal composite straight pipe for matrix, along matrix main leg outer wall spinning 3 full helical corrugations, spiral groove depth 1.8 ~ 2.4mm, helicla flute spacing 7.5 ~ 8.5mm, helical angle 25 ° ~ 35 °, again by matrix undergauge section spinning transition arc 8 ~ 10mm, transition arc is to tube end diameter 15.83 ~ 15.93mm; Make the full helical corrugation metal tube of crude green body;
2) acid corrosion process: the base of above-mentioned preparation is placed on acid solution and soaks taking-up after 4 ~ 5 hours, by a large amount of clean water, the water after cleaning reclaims;
3) mechanical grinding: the burr adopting mechanical frosted process crude green body;
4) centrifugal casting technique: by vertical centrifugal pouring technology, within it one deck GH4742 alloy-layer poured into a mould by wall,
5) mechanical performance sizing: by the full helical corrugation metal tube after step 4) process, at normal temperatures, mixing with water with the river sand about 50 orders pours in tube chamber, then populated full helical corrugation metal tube is put into refrigerator-freezer, under subzero 15 degree Celsius, carry out freezing processing 2 ~ 3 hours, residual moisture in pipe is fully frozen and freezes reality;
6) take out the full helical corrugation metal tube of step 5), rinse well with water at normal temperatures, put into drying frame and carry out drying, namely can be made into the seamless full helical corrugation metal connecting tube of reducing.
2., as right wants the preparation method as described in 1, it is characterized in that: 19.05 × 0.8mm Cu-Al bimetal composite straight pipe in described step 1) adopt TU0 TU1 TU2 TP1 TP2 T2:1050 1060 3003 3A21 be that the ratio of 70 ~ 75:25 ~ 30 is made.
3. as right wants the preparation method as described in 1, it is characterized in that: described step 2) acid solution according to nitric acid: acetic acid: water is (3 ~ 5): (8 ~ 15): 100 ratio preparation.
4. as right wants the preparation method as described in 1, it is characterized in that: described reducing is seamless full helical corrugation metal connecting tube it be made up of pipe end, undergauge section, full helical corrugation main leg three part, pipeline section is axial isometrical " S " shape inside spin corrugated metal rib structure, and undergauge Duan Weiquan helical corrugation supervisor two ends undergauge section is dwindled into gradually by undergauge and requires pipe end.
5. as right wants the preparation method as described in 4, it is characterized in that: described a kind of air-conditioning and the seamless full helical corrugation metal connecting tube spiral metal rib of cooling reducing are characterised in that: the metal ribs number of full helical corrugation metal connecting tube is 1 ~ 10, spiral angle 15 ~ 75 °, helical corrugation groove depth 0.5 ~ 10mm, separation 1 ~ 20mm.
6. as right wants the preparation method as described in 4, it is characterized in that: described pipe end external diameter 6 ~ 42mm, undergauge section transition arc 3 ~ 35mm, full helical corrugation main leg external diameter 8 ~ 65mm.
7. as right wants the preparation method as described in 4, it is characterized in that: described full helical corrugation metal connecting tube total length 1000 ~ 15000mm, pipe end length 50 ~ 500mm, undergauge segment length 2 ~ 40mm.
8. as right wants the preparation method as described in 1, it is characterized in that: the pouring technology of described step 4) is:
The first step, preparation work: open centrifugal casting machine, arrange rotation revolution, calculates pour steel amount, and control poring rate at 3kg/s-5kg/s, the duration of pouring is 3s-5s;
Second step, after the first step completes, temperature control to 200 DEG C, drenches and hands over one deck glass fiber reinforced plastic water, and control poring rate at 1kg/s-3kg/s, the duration of pouring is 1s-3s;
3rd step, after second step completes, temperature control to 400 DEG C-500 DEG C, second pouring one deck molten steel, control poring rate at 5kg/s-8kg/s, the duration of pouring is 5s-8s;
4th step, cooling and demolding: centrifugal casting machine keeps duty, to molten steel cools, closes centrifugal casting machine, the demoulding after centrifugal casting machine stops operating.
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| CN201510538409.3A CN105215332B (en) | 2015-08-28 | 2015-08-28 | A kind of preparation method of cooling reducing is seamless full helical corrugation metal connecting tube |
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| CN201510538409.3A CN105215332B (en) | 2015-08-28 | 2015-08-28 | A kind of preparation method of cooling reducing is seamless full helical corrugation metal connecting tube |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036313A (en) * | 1973-08-04 | 1975-04-05 | ||
| JP2004337969A (en) * | 2003-03-20 | 2004-12-02 | Nittetsu Elex Co Ltd | Method for manufacturing bellows tube |
| CN201757490U (en) * | 2010-07-27 | 2011-03-09 | 宁波泰尔汽车部件有限公司 | Spinning bamboo joint shaped air conditioner tube |
| CN103302121A (en) * | 2013-04-29 | 2013-09-18 | 鹤壁市普鑫镁制品工贸有限公司 | Novel energy-saving spiral magnesium alloy tube of heat exchanger |
| CN103453233A (en) * | 2013-09-03 | 2013-12-18 | 陈卫国 | Different-diameter joint-free corrugated connecting pipe and manufacturing method thereof |
| CN103861914A (en) * | 2014-03-18 | 2014-06-18 | 沈阳汇祥科技有限公司 | Preparation method of screw-type fin tube |
-
2015
- 2015-08-28 CN CN201510538409.3A patent/CN105215332B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036313A (en) * | 1973-08-04 | 1975-04-05 | ||
| JP2004337969A (en) * | 2003-03-20 | 2004-12-02 | Nittetsu Elex Co Ltd | Method for manufacturing bellows tube |
| CN201757490U (en) * | 2010-07-27 | 2011-03-09 | 宁波泰尔汽车部件有限公司 | Spinning bamboo joint shaped air conditioner tube |
| CN103302121A (en) * | 2013-04-29 | 2013-09-18 | 鹤壁市普鑫镁制品工贸有限公司 | Novel energy-saving spiral magnesium alloy tube of heat exchanger |
| CN103453233A (en) * | 2013-09-03 | 2013-12-18 | 陈卫国 | Different-diameter joint-free corrugated connecting pipe and manufacturing method thereof |
| CN103861914A (en) * | 2014-03-18 | 2014-06-18 | 沈阳汇祥科技有限公司 | Preparation method of screw-type fin tube |
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| CN105215332B (en) | 2017-11-24 |
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Effective date of registration: 20200131 Address after: 257336 east of Yong'an Road, south of Qi Road, daozhuang Town, Guangrao County, Dongying City, Shandong Province Patentee after: Shandong Jiaming Seiko technology Co., Ltd Address before: 257336, Dongying County, Shandong City, Guangrao province Zhen Dong Du Village Patentee before: Shandong Hao Lintong industry Co., Ltd |