CN103143799A - Processing technology of connecting pipe fitting - Google Patents
Processing technology of connecting pipe fitting Download PDFInfo
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- CN103143799A CN103143799A CN2013100793579A CN201310079357A CN103143799A CN 103143799 A CN103143799 A CN 103143799A CN 2013100793579 A CN2013100793579 A CN 2013100793579A CN 201310079357 A CN201310079357 A CN 201310079357A CN 103143799 A CN103143799 A CN 103143799A
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- weldment
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- inner sleeve
- connecting tube
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Abstract
The invention discloses a processing technology of a connecting pipe fitting, and belongs to the technical field of connecting pipe fitting processing. The processing technology comprises the steps of weldment preparation, weldment mounting, welding flux adding and welding, wherein the weldment preparation comprises soft water cleaning and vacuum drying; the surface of a piece to be welded is smooth and clean and free from cracks and severe deformation; the welding surface is free from scale, grease and dust; a weldment is mounted and kept upright; a mutual center is free from deviation; the periphery of the weldment is equidistant; a welding flux is introduced; welding is conducted under vacuum protection; and the permeation length of the welding flux is not less than 4mm. A pipeline manufactured by the processing technology is good in airtightness and convenient to use; technology control of the whole processing procedure is relatively accurate; and the processing technology can be applied to the processing procedure of the connecting pipe fitting of air-conditioning equipment and the like.
Description
Technical field
The present invention relates to a kind of processing technology of connecting tube, belong to the connecting tube processing technique field.
Background technology
Connecting tube such as tube connector, blast pipe etc., as carry, a kind of in connecting tube, be widely used in the equipment such as air-conditioning.The processing method of existing connecting tube is to install by the combination of different pipe fittings, its connection or mounting means mainly adopt the mode of interference or close-fitting, then add solder welds in the junction, this mode has improved the sealing of installing in the ideal situation, but the superfluous accumulation of solder easily occurs in the junction, solder distributes the problems such as irregular, and the surface quality after welding is relatively poor, if solder is deposited on inner-walls of duct, easily cause the turbulent phenomenon of air-flow in pipe fitting, be unfavorable for the smooth discharge of gas; If solder is deposited in pipeline outer wall, in transportation and use procedure, easily to swipe, brazing filler metal on surface easily is touched down, and is unfavorable for the air-tightness guarantee of junction.Simultaneously, be that the mode of interference or close-fitting is installed due to what adopt, and the pipe fitting that adopts is metal material, need between pipe fitting could realize installing by extruding, in the extruding installation process, easily cause not breaking or breakage of pipeline, easily cause the hidden danger of air-tightness problem.
Have based on this, make the present invention.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the processing technology of a kind of pipeline air-tightness connecting tube good, easy to use.
For achieving the above object, the technical scheme taked of the present invention is as follows:
The processing technology of connecting tube comprises that weldment is prepared, weldment is installed, scolder adds and welding, and described weldment prepares to comprise that soft water cleans, vacuum drying, treats the weldment any surface finish, flawless and gross distortion, face of weld non-scale, grease, dust; Weldment is installed, guaranteed that weldment is proper, the center is without skew each other, and the weldment periphery is equidistant; Introduce scolder, weld under vacuum protection, the scolder penetration length is not less than 4mm.
For realizing better processing effect, further arranging of technique scheme is as follows:
Described weldment comprises inner sleeve and overcoat, and the inner sleeve cooperation is arranged in overcoat, and inner sleeve external diameter and outer casing internal diameter differ 0.01-0.15mm.
Described welding manner is slice welding or gas brazing.
Described scolder is the copper parent metal.
Be provided with fixture on the outer tube wall of described inner sleeve.
Described fixture is projection or annular knurl.
Described projection is 2-15, evenly is arranged on the inner sleeve circumference, and this projection can be formed to the outer wall direction is outstanding by the inwall of inner sleeve, also can outwards be given prominence to forming on outer wall by overcoat.
Described annular knurl is arranged on the inner sleeve circumference.
Described inner sleeve is copper pipe, and overcoat is stainless steel tube, carbon steel pipe or carbon steel seat.
Operation principle and the beneficial effect of the processing technology of connecting tube of the present invention are as follows:
after weldment is carried out cleaning pretreatment, inner sleeve is arranged in overcoat by matched in clearance, and adopt high temperature tin bronze cored solder to weld, structure setting by inner sleeve and overcoat, make it to realize the matched in clearance installation, in welding process, solder directly falls between the gap of inner sleeve and overcoat after melting, be provided with fixture on outer wall of inside race, positioning action is played in the position that internally is enclosed within overcoat on the one hand, make inner sleeve be arranged on the suitable location of overcoat, guarantee that welding is proper, between inner sleeve and overcoat, the center is without deflection, the gap is even, facilitate using and installing of weldment, on the other hand, the setting of fixture evenly distributes solder between inner sleeve and overcoat, guaranteed the air-tightness of welding gained connecting tube, testing result shows: adopt the air-tightness of technique gained connecting tube of the present invention higher, pass into 3MPa compressed air, 3 minutes all without revealing, can satisfy the refrigeration plants such as air-conditioning to the requirement of connecting tube.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 gained connecting tube;
Fig. 2 is structure and the dimensional standard schematic diagram of inner sleeve in Fig. 1;
Fig. 3 is structure and the dimensional standard schematic diagram of overcoat in Fig. 1;
Fig. 4 is the structural representation of embodiment 2 gained connecting tubes;
Fig. 5 is structure and the dimensional standard schematic diagram of inner sleeve in Fig. 4;
Fig. 6 is structure and the dimensional standard schematic diagram of overcoat in Fig. 4.
Number in the figure: 1, inner sleeve; 11, fixture; 2, overcoat; 21, sharp limit chamfering; 22, notch.
The specific embodiment
Carry out the explanation of technical scheme in the present embodiment as an example of blast pipe example, weldment used is stainless steel tube and copper pipe, in conjunction with Fig. 1-3, wherein, inner sleeve 1 is copper pipe, inner sleeve 1 lower end arranges fixture 11, this fixture 11 for the annular knurl that arranges along inner sleeve 1 outer wall circumference (annular knurl be striped or latticed all can), copper pipe inner sleeve 1 total height L
ABe 43 ± 0.5mm, D outer diameter
A1Be 10mm, wall thickness b is 1.1-1.2mm, and fixture 11(is annular knurl) bilateral D outer diameter
A2Be 10.18-10.25mm; Overcoat 2 is stainless steel tube, stainless steel tube overcoat 2 height L
BBe 7.8mm, D outer diameter
B1Be 12.5 ± 0.1mm, inner diameter D
B2Be 10.15-10.2mm, sharp limit chamfering 21 is C0.5.
Respectively copper pipe inner sleeve 1 and stainless steel tube overcoat 2 are carried out soft water cleaning and vacuum drying, guarantee that tube wall surface is bright and clean, flawless and gross distortion, face of weld non-scale, grease, dust; Stainless steel tube overcoat 2 is sleeved on outside copper pipe inner sleeve 1, guarantees that weldment is proper, and between inner sleeve 1 and overcoat 2, the center is without skew, and the weldment periphery is equidistant, and namely inner sleeve 1 is 0.01-0.15mm with the peripheral fit clearance of overcoat 2; Introduce scolder; weld under vacuum protection; welding manner is gas brazing; wherein; source of the gas is oxygen and coal gas; the output pressure of oxygen is 150KPa; the output pressure of coal gas (the common coal gas of rock gas, home-use gas piping supply or coke-stove gas etc. all can) is 50KPa; the sample rotating speed of gas brazing is 20-50HZ; that more excellent is 30HZ; gas brazing copper parent metal used is strong solder, and in this strong solder, copper content is the 50-70%(mass percent), the scolder penetration length is not less than 4mm.
Adopt the air-tightness of the present embodiment process conditions gained connecting tube higher, pass into 3MPa compressed air, 3 minutes all without leakage, can satisfy the refrigeration plant such as air-conditioning to the requirement of connecting tube.
The present embodiment carries out the explanation of technical scheme as an example of tube connector example, weldment used is carbon steel seat and copper pipe, in conjunction with Fig. 4-6, wherein, inner sleeve 1 is copper pipe, and inner sleeve 1 lower end is provided with fixture 11, this fixture 11 is 6 projections along inner sleeve 1 outer wall even circumferential, the total height L of copper pipe inner sleeve 1
ABe 10 ± 0.2mm, D outer diameter
A1Be 17.9-18mm; Fixture 11(i.e. projection) center is far from the distance L of lower surface
A1Be 2.5mm, the width d of fixture 11 is 0.8mm, is highly 0.01-0.15mm; Overcoat 2 is the carbon steel seat, overcoat 2 total height L
BBe 14.5 ± 0.1mm, wherein, sharp limit chamfering 21 is C0.5, notch 22 height L
B1Be 4.2-4.3mm, inner diameter D
B11Be 18.04-18.06mm, D outer diameter
B12Be 20 ± 0.1mm.
Respectively copper pipe inner sleeve 1 and carbon steel seat overcoat 2 are carried out soft water cleaning and vacuum drying, guarantee that tube wall surface is bright and clean, flawless and gross distortion, face of weld non-scale, grease, dust; Carbon steel seat overcoat 2 is sleeved on outside copper pipe inner sleeve 1, guarantees that weldment is proper, and between inner sleeve 1 and overcoat 2, the center is without skew, and the weldment periphery is equidistant, and namely inner sleeve 1 is 0.01-0.15mm with the peripheral fit clearance of overcoat 2; Introduce scolder; weld under vacuum protection, welding manner is the slice weldering, and temperature is controlled at 1050 ± 5 ℃; network speed is that the 10-30HZ(rotating speed is 16-16.5cm/min); more excellent, network speed is 14HZ, copper parent metal used is the tin bronze scolder; in this tin bronze scolder; copper content is the 90-95%(mass percent), tin content is the 7-10%(mass percent), the scolder penetration length is not less than 4mm.
Adopt the air-tightness of the present embodiment process conditions gained connecting tube higher, pass into 3MPa compressed air, 3 minutes all without leakage, can satisfy the refrigeration plant such as air-conditioning to the requirement of connecting tube.
Claims (9)
1. the processing technology of a connecting tube, it is characterized in that: comprise that weldment is prepared, weldment is installed, scolder adds and welding, described weldment prepares to comprise that soft water cleans, vacuum drying, treats the weldment any surface finish, flawless and gross distortion, face of weld non-scale, grease, dust; Weldment is installed, guaranteed that weldment is proper, the center is without skew each other, and the weldment periphery is equidistant; Introduce scolder, weld under vacuum protection, the scolder penetration length is not less than 4mm.
2. the processing technology of a kind of connecting tube according to claim 1, it is characterized in that: described weldment comprises inner sleeve and overcoat, and inner sleeve coordinates and is arranged in overcoat, and inner sleeve external diameter and outer casing internal diameter differ 0.01-0.15mm.
3. the processing technology of a kind of connecting tube according to claim 2, is characterized in that: be provided with fixture on the outer tube wall of described inner sleeve.
4. the processing technology of a kind of connecting tube according to claim 3, it is characterized in that: described fixture is projection or annular knurl.
5. the processing technology of a kind of connecting tube according to claim 4 is characterized in that: described projection is 2-15, evenly is arranged on the inner sleeve circumference.
6. the processing technology of a kind of connecting tube according to claim 4, it is characterized in that: described annular knurl is arranged on the inner sleeve circumference.
7. the processing technology of a kind of connecting tube according to claim 1, it is characterized in that: described inner sleeve is copper pipe, overcoat is stainless steel tube, carbon steel pipe or carbon steel seat.
8. the processing technology of according to claim 1 or 7 described a kind of connecting tubes is characterized in that: described welding manner is slice welding or gas brazing.
9. the processing technology of a kind of connecting tube according to claim 8, it is characterized in that: described scolder is the copper parent metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079357.9A CN103143799B (en) | 2013-03-12 | 2013-03-12 | Processing technology of connecting pipe fitting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079357.9A CN103143799B (en) | 2013-03-12 | 2013-03-12 | Processing technology of connecting pipe fitting |
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| CN103143799A true CN103143799A (en) | 2013-06-12 |
| CN103143799B CN103143799B (en) | 2015-07-08 |
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| CN201310079357.9A Expired - Fee Related CN103143799B (en) | 2013-03-12 | 2013-03-12 | Processing technology of connecting pipe fitting |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537875A (en) * | 2013-10-25 | 2014-01-29 | 嵊州市致远焊接制品有限公司 | Process for machining refrigerating pipe fittings |
| CN103600147A (en) * | 2013-10-22 | 2014-02-26 | 重庆建工第三建设有限责任公司 | Copper pipe socket brazed connection construction method |
| CN103624356A (en) * | 2013-11-14 | 2014-03-12 | 北京航空航天大学 | Method for large-area low-defect rate soldering of dissimilar metallic combination drive pipe structure |
| CN104806824A (en) * | 2015-04-24 | 2015-07-29 | 施勇波 | Novel copper and steel composite pipe, manufacture method and application |
| CN105855654A (en) * | 2015-01-19 | 2016-08-17 | 浙江三花制冷集团有限公司 | Gas-liquid separator and connecting pipe welding assembly |
| CN109366009A (en) * | 2018-12-10 | 2019-02-22 | 贵州航天精工制造有限公司 | A kind of bolt assembly laser welding processing method |
| CN109845013A (en) * | 2016-10-27 | 2019-06-04 | 京瓷株式会社 | Stack of cells device, module and module storing apparatus |
| CN115121894A (en) * | 2022-08-29 | 2022-09-30 | 西安成立航空制造有限公司 | Vacuum brazing method and equipment for flareless pipeline connecting piece for aircraft engine |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600147A (en) * | 2013-10-22 | 2014-02-26 | 重庆建工第三建设有限责任公司 | Copper pipe socket brazed connection construction method |
| CN103600147B (en) * | 2013-10-22 | 2017-01-25 | 重庆建工第三建设有限责任公司 | Copper pipe socket brazed connection construction method |
| CN103537875A (en) * | 2013-10-25 | 2014-01-29 | 嵊州市致远焊接制品有限公司 | Process for machining refrigerating pipe fittings |
| CN103537875B (en) * | 2013-10-25 | 2016-08-17 | 嵊州市致远焊接制品有限公司 | The processing technique of refrigerating pipe |
| CN103624356A (en) * | 2013-11-14 | 2014-03-12 | 北京航空航天大学 | Method for large-area low-defect rate soldering of dissimilar metallic combination drive pipe structure |
| CN105855654A (en) * | 2015-01-19 | 2016-08-17 | 浙江三花制冷集团有限公司 | Gas-liquid separator and connecting pipe welding assembly |
| CN104806824A (en) * | 2015-04-24 | 2015-07-29 | 施勇波 | Novel copper and steel composite pipe, manufacture method and application |
| CN109845013A (en) * | 2016-10-27 | 2019-06-04 | 京瓷株式会社 | Stack of cells device, module and module storing apparatus |
| US11309573B2 (en) | 2016-10-27 | 2022-04-19 | Kyocera Corporation | Cell stack device, module, and module housing device |
| US11742510B2 (en) | 2016-10-27 | 2023-08-29 | Kyocera Corporation | Cell stack device, module, and module housing device |
| CN109366009A (en) * | 2018-12-10 | 2019-02-22 | 贵州航天精工制造有限公司 | A kind of bolt assembly laser welding processing method |
| CN115121894A (en) * | 2022-08-29 | 2022-09-30 | 西安成立航空制造有限公司 | Vacuum brazing method and equipment for flareless pipeline connecting piece for aircraft engine |
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| CN103143799B (en) | 2015-07-08 |
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Granted publication date: 20150708 |