CN102357703B - A kind of Welding method of copper pipes - Google Patents
A kind of Welding method of copper pipes Download PDFInfo
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- CN102357703B CN102357703B CN201110283265.3A CN201110283265A CN102357703B CN 102357703 B CN102357703 B CN 102357703B CN 201110283265 A CN201110283265 A CN 201110283265A CN 102357703 B CN102357703 B CN 102357703B
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Abstract
A kind of Welding method of copper pipes, including：The pressure reducing valve valve for opening nitrogen cylinder, makes nitrogen flow through inside copper pipe welding position, drives copper inner air tube away, immediately close off the pressure reducing valve valve of nitrogen cylinder；Open welding torch igniting；First insertion tube is added with torch flame, flame shifted to outer tube after slightly hot；Left-right and front-back moves welding torch, when joint for pipe being made to be uniformly heated to welding temperature, solder is added and is welded；After welding, torch flame is removed, shuts welding gun.The welding quality of the present invention is good, improves welding efficiency, has saved cost, time saving and energy saving saving of labor.
Description
【Technical field】
The invention belongs to the welding methods between welding technology field, in particular to a kind of refrigeration industry copper pipe and copper pipe.
【Background technology】
In the operation of refrigeration industry air conditioner installation and maintenance, welding is an extremely important job.Welding quality
Quality directly influences the quality of installation and maintenance.Refrigeration system such as leaks, and just influences whether refrigeration effect.And it leaks
Refrigerant can cause environmental pollution, human body is damaged.Therefore, there are very high sealing requirements to refrigeration system, this
The welding technique of high quality is required to ensure.
The refrigeration system of minitype air conditioner equipment generally uses the metal materials such as copper, aluminium and steel, pipeline connection generally to use gas
Weldering welding.Two soldered junctions are melted using the thermal-flame generated after fuel gas and combustion-supporting gas mixing ignition
Metal makes the metal collection being melted at a shared molten bath, and an inseparable connector is formed after cooled and solidified, this
Kind welding manner is exactly gas welding.
Welding wherein between copper pipe and copper pipe, it is also necessary to nitrogen is filled in copper pipe, because being filled with nitrogen in copper pipe
After welded, can make that copper pipe inner wall is bright, cleaning, non-oxidation layer, to ensure the cleannes of system.
For many years, world-famous brand air conditioning system maker, such as Daikin air-conditioning, Hitachi's air-conditioning, domestic well-known air-conditioning
Manufacturer, when training air-conditioning maintenance installer, uses the welding between copper pipe and copper pipe such as Gree, U.S.
Following method：
As shown in Figure 1, in figure 1 be gas welding position, 2 be welding gun, and 3 be copper pipe, and 4 be nitrogen cylinder.When inflated with nitrogen welds, copper
Pipe end does not allow to seal, to enable the air in pipeline to be discharged.Air in pipeline first is washed away with nitrogen when welding, so
Nitrogen is sent into pipe on one side afterwards, is welded on one side.Continue to send nitrogen after welding, until weld point temperature reaches room temperature.
Currently, all air-conditioning maintenance erectors connect the religion according to senior lecturer, senior engineer on training session per capita both at home and abroad
It leads, the welding being all made of between above method progress copper pipe and copper pipe.And training session teacher emphasizes one again and again when can be at school
Surely copper pipe is welded to eliminate oxide layer with the nitrogen of flowing always, weld point temperature arrives after ensureing a direct sending nitrogen to welding
Until room temperature, nitrogen is The more the better.
In addition, being also that so introduction student carries out copper pipe weldering using the above method in the textbook of all Vocationl Technical Colleges
It connects, such as Chemical Industry Press published in May, 2010《Air conditioner is installed one and is led to》(Wei Long chief editors) page 106.
The present inventor is also educatee therein, also uses the above method to work always for many years.But long-term
Find that carrying out copper pipe welding using the above method also there are many shortcomings in working practice：1, due to having nitrogen always in copper pipe
Flowing, copper pipe inside and outside pressure imbalance, solder experience pressure and are easy to generate bubble in welding position, to influence to weld matter
Amount；2, there is nitrogen flow in copper pipe always, the heat of welding position can be taken away in this way, the fusing speed of solder is made to reduce, to
Influence welding efficiency；3, welding needs a large amount of nitrogen, many air conditioner manufacturers to be also specially equipped with nitrogen production equipment,
Therefore, cost is also quite high；4, air-conditioning installation and maintenance worker carries out that when copper pipe welding job bulky nitrogen cylinder need to be carried,
Sometimes stair climbing is also wanted, it is time-consuming and laborious.
In view of this, the present inventor furthers investigate in view of the drawbacks of the prior art, and there is this case generation.
【Invention content】
Technical problem to be solved by the present invention lies in a kind of Welding method of copper pipes is provided, not using this method welding copper pipe
Only welding quality is good and efficient, cost-effective.
The present invention solves above-mentioned technical problem using following technical scheme：
A kind of Welding method of copper pipes, includes the following steps：
Step 1：The pressure reducing valve valve for opening nitrogen cylinder, makes nitrogen flow through inside copper pipe welding position, drives away empty in copper pipe
Gas immediately closes off the pressure reducing valve valve of nitrogen cylinder；
Step 2：Open welding torch igniting；
Step 3：First insertion tube is added with torch flame, flame shifted to outer tube after slightly hot；
Step 4：Left-right and front-back moves welding torch, when joint for pipe being made to be uniformly heated to welding temperature, solder is added and is welded
It connects；
Step 5：After welding, torch flame is removed, shuts welding gun.
Further, nitrogen cylinder is removed, then will be with nitrogen after the pressure reducing valve valve for closing nitrogen cylinder in the step 1
The copper pipe end of gas cylinder connection seals.
Further, in the step 1 other end of nitrogen cylinder is will be far from after the pressure reducing valve valve for closing nitrogen cylinder
Copper pipe end seals.
Further, other end port of the copper pipe far from nitrogen cylinder with a distance from welding position in 40cm or more.
Further, further include：
Step 6：The welding job time is carried out as more than four hours in same root copper pipe different parts, then is transferred to step 1.
The advantage of the invention is that：1, inside does not have nitrogen flow, copper pipe internal and external pressure balance when copper pipe welds, it is not easy to
Bubble is generated in welding position, to improve welding quality；2, the heat of welding position will not be taken away without nitrogen flow in copper pipe
The fusing speed of amount, solder improves, to improve welding efficiency；3, welding does not need a large amount of nitrogen, air conditioner manufacturer
It need not be specially equipped with nitrogen production equipment, only small canned nitrogen cylinder need to be bought, save cost；4, air-conditioning installation and maintenance worker
It carries out only carrying portable small nitrogen cylinder, time saving and energy saving saving of labor when copper pipe welding job.
【Description of the drawings】
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is prior art copper pipe of air conditioner welding equipment structural schematic diagram.
Fig. 2 is first embodiment of the invention copper pipe of air conditioner welding equipment structural schematic diagram.
Fig. 3 is second embodiment of the invention copper pipe of air conditioner welding equipment structural schematic diagram.
Fig. 4 is third embodiment of the invention copper pipe of air conditioner welding equipment structural schematic diagram.
【Specific implementation mode】
First embodiment：
As shown in Fig. 2, a kind of Welding method of copper pipes, includes the following steps：
Step 1：The pressure reducing valve valve for opening nitrogen cylinder 4, makes nitrogen flow through inside 3 welding position 1 of copper pipe, drives copper pipe 3 away
Interior air immediately closes off the pressure reducing valve valve of nitrogen cylinder 4.Other end port 31 of the copper pipe 3 far from nitrogen cylinder can with open-ended, but
It need to be ensured from 1 distance d of welding position in 40cm or more.
Step 2：Welding torch 2 is opened to light a fire；
Step 3：It first uses 2 flame of welding torch to be added insertion tube, flame is shifted to outer tube after slightly hot；
Step 4：Left-right and front-back moves welding torch 2, when joint for pipe being made to be uniformly heated to welding temperature, solder is added and carries out
Welding；
Step 5：After welding, 2 flame of welding torch is removed, welding gun is shut.
If being more than four hours in the same root copper pipe different parts progress welding job time, it is transferred to step 1 and continues work
Make.
Second embodiment：
As shown in figure 3, a kind of Welding method of copper pipes, includes the following steps：
Step 1：The pressure reducing valve valve for opening nitrogen cylinder 4, makes nitrogen flow through inside 3 welding position 1 of copper pipe, drives copper pipe 3 away
Interior air immediately closes off the pressure reducing valve valve of nitrogen cylinder 4.By copper pipe 3, the other end port 31 far from nitrogen cylinder is sealed at this time.
Step 2：Welding torch 2 is opened to light a fire；
Step 3：It first uses 2 flame of welding torch to be added insertion tube, flame is shifted to outer tube after slightly hot；
Step 4：Left-right and front-back moves welding torch 2, when joint for pipe being made to be uniformly heated to welding temperature, solder is added and carries out
Welding；
Step 5：After welding, 2 flame of welding torch is removed, welding gun is shut.
If being more than four hours in the same root copper pipe different parts progress welding job time, it is transferred to step 1 and continues work
Make.
3rd embodiment：
As shown in figure 4, a kind of Welding method of copper pipes, includes the following steps：
Step 1：The pressure reducing valve valve for opening nitrogen cylinder 4, makes nitrogen flow through inside 3 welding position 1 of copper pipe, drives copper pipe 3 away
Interior air immediately closes off the pressure reducing valve valve of nitrogen cylinder 4.The copper pipe 3 that nitrogen cylinder 4 is removed, but need to will be connect with nitrogen cylinder 4
Port 32 seals.If at this point, other end port 31 of the copper pipe 3 far from nitrogen cylinder 4 from 1 distance d of welding position 40cm with
Interior, then port 31 has to seal, if other end port 31 of the copper pipe 3 far from nitrogen cylinder 4 is super from 1 distance d of welding position
40cm or more is crossed, then the sealing of port 31 or open-ended.
Step 2：Welding torch 2 is opened to light a fire；
Step 3：It first uses 2 flame of welding torch to be added insertion tube, flame is shifted to outer tube after slightly hot；
Step 4：Left-right and front-back moves welding torch 2, when joint for pipe being made to be uniformly heated to welding temperature, solder is added and carries out
Welding；
Step 5：After welding, 2 flame of welding torch is removed, welding gun is shut.
If being more than four hours in the same root copper pipe different parts progress welding job time, it is transferred to step 1 and continues work
Make.
The beneficial effects of the present invention are：
1, inside does not have nitrogen flow, copper pipe internal and external pressure balance when copper pipe welds, it is not easy to generate gas in welding position
Bubble, to improve welding quality.
2, the heat of welding position will not be taken away, the fusing speed of solder improves, to carry without nitrogen flow in copper pipe
High welding efficiency.
3, welding does not need a large amount of nitrogen, and air conditioner manufacturer need not specially be equipped with nitrogen production equipment, only need to purchase
Small canned nitrogen cylinder is bought, cost has been saved；The air conditioner manufacturer of the prior art produces outer machine condensation in assembling complete machine
Device, interior evaporator, installation, which sets up the welding of steel pipe road, will spend a large amount of nitrogen, if all using the method for the present invention, will save
Small 80% nitrogen, this is a considerable economic item.
4, air-conditioning installation and maintenance worker carries out only carrying portable small nitrogen cylinder when copper pipe welding job, time saving and energy saving
Saving of labor.
The present inventor starts to query this prior art after finding the deficiencies in the prior art, in the reality of the research present invention
During testing, the colleague of surrounding does not understand the behavior of the present inventor due to being fettered by traditional thought, cynical, it is believed that no
Should negate we believe that thing, should not negate expert.But the present inventor ignores, and continues to study, it is believed that one
Surely the oxide layer for thering is better method to be generated when eliminating welding.After the present invention study successfully, find to bring huge have
Beneficial effect.
The present invention overcomes the constraints of traditional thought, not only overcome technology prejudice, also bring huge economic effect,
Therefore, the present invention has novelty and creativeness.
The foregoing is merely the preferable implementation use-cases of the present invention, are not intended to limit the protection model figure of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement and improvement etc., should be included in the present invention's made by
Within protection domain.
Claims (2)
1. a kind of Welding method of copper pipes, it is characterised in that：Include the following steps：
Step 1：The pressure reducing valve valve for opening nitrogen cylinder, makes nitrogen flow through inside copper pipe welding position, drives copper inner air tube away,
After the pressure reducing valve valve for immediately closing off nitrogen cylinder, nitrogen cylinder is removed, and the copper pipe end being connect with nitrogen cylinder is sealed, then
The other end copper pipe end that will be far from nitrogen cylinder seals；
Step 2：Open welding torch igniting；
Step 3：First insertion tube is added with torch flame, flame shifted to outer tube after slightly hot；
Step 4：Left-right and front-back moves welding torch, when joint for pipe being made to be uniformly heated to welding temperature, solder is added and is welded；
The welding job time is carried out as more than four hours in same root copper pipe different parts, then is transferred to step 1；
Step 5：After welding, torch flame is removed, shuts welding gun.
2. a kind of Welding method of copper pipes as described in claim 1, it is characterised in that：The other end of the copper pipe far from nitrogen cylinder
Port is with a distance from welding position in 40cm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110283265.3A CN102357703B (en) | 2011-09-22 | 2011-09-22 | A kind of Welding method of copper pipes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110283265.3A CN102357703B (en) | 2011-09-22 | 2011-09-22 | A kind of Welding method of copper pipes |
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| Publication Number | Publication Date |
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| CN102357703A CN102357703A (en) | 2012-02-22 |
| CN102357703B true CN102357703B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110283265.3A Active CN102357703B (en) | 2011-09-22 | 2011-09-22 | A kind of Welding method of copper pipes |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331538B (en) * | 2013-07-10 | 2017-08-01 | 青岛职业技术学院 | A kind of copper pipe nitrogen charging and welding method and nitrogen charging welding controller |
| CN103934548B (en) * | 2014-03-11 | 2016-08-24 | 中国化学工程第六建设有限公司 | A kind of welding method of pure nickel pipeline |
| CN106077907A (en) * | 2016-06-17 | 2016-11-09 | 合肥卡诺汽车空调有限公司 | A kind of refrigeration pipe part welding procedure |
| CN106180959A (en) * | 2016-08-08 | 2016-12-07 | 常州常发制冷科技有限公司 | A kind of Welding method of copper pipes |
| CN111204513A (en) * | 2018-11-22 | 2020-05-29 | 江苏明利嘉科技有限公司 | Energy-saving copper pipe anti-oxidation storage device convenient to store and take |
| CN112775508A (en) * | 2019-11-11 | 2021-05-11 | 湖北伊克斯热交换系统有限公司 | Welding method for hollow workpiece |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0553909A1 (en) * | 1992-01-28 | 1993-08-04 | Perfecta Chemie B.V. | Method for soldering pipes |
| US5390846A (en) * | 1993-08-11 | 1995-02-21 | Thode; Jonathan E. | Welding gas purging apparatus and method |
| JPH09234559A (en) * | 1996-02-29 | 1997-09-09 | Ezaki Kogyo Kk | Brazing method and brazing device |
| CN101806376A (en) * | 2010-04-01 | 2010-08-18 | 中国建筑第七工程局有限公司 | Method for mounting coolant pipes of air conditioning system |
| CN102062224A (en) * | 2010-12-17 | 2011-05-18 | 宁波奥克斯空调有限公司 | Copper pipe soldering nitrogen blanketing protection device and method, and control valve |
-
2011
- 2011-09-22 CN CN201110283265.3A patent/CN102357703B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0553909A1 (en) * | 1992-01-28 | 1993-08-04 | Perfecta Chemie B.V. | Method for soldering pipes |
| US5390846A (en) * | 1993-08-11 | 1995-02-21 | Thode; Jonathan E. | Welding gas purging apparatus and method |
| JPH09234559A (en) * | 1996-02-29 | 1997-09-09 | Ezaki Kogyo Kk | Brazing method and brazing device |
| CN101806376A (en) * | 2010-04-01 | 2010-08-18 | 中国建筑第七工程局有限公司 | Method for mounting coolant pipes of air conditioning system |
| CN102062224A (en) * | 2010-12-17 | 2011-05-18 | 宁波奥克斯空调有限公司 | Copper pipe soldering nitrogen blanketing protection device and method, and control valve |
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| CN102357703A (en) | 2012-02-22 |
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