CN112658421A - Welding method and welding assembly for refrigeration copper pipe - Google Patents
Welding method and welding assembly for refrigeration copper pipe Download PDFInfo
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- CN112658421A CN112658421A CN202011465563.XA CN202011465563A CN112658421A CN 112658421 A CN112658421 A CN 112658421A CN 202011465563 A CN202011465563 A CN 202011465563A CN 112658421 A CN112658421 A CN 112658421A
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Abstract
The invention discloses a welding method and a welding assembly for a refrigeration copper pipe, wherein the welding method for the refrigeration copper pipe comprises the following steps: s1: inserting the welding part of the inner copper pipe into the outer copper pipe, and forming a welding gap between the outer wall of the inner copper pipe and the inner wall of the outer copper pipe; s2: uniformly heating the lower end of the welding gap to melt the standard amount of welding flux at the upper end of the welding gap to form welding liquid; s3: when the welding liquid flows downwards in the welding gap, the welding liquid is triggered to uniformly fill the welding gap, the welding liquid is used for welding the refrigerating copper pipe, the lower end of the welding gap of the copper pipe is heated, the welding liquid only needs to move axially and slightly radially, the welding liquid at the upper end flows downwards uniformly, the flowing speed of the welding liquid is accelerated, the welding efficiency is improved, the welding liquid is uniformly filled in the welding gap, the welding quality is improved, and the welding assembly is simple in structure, convenient to implement and wide in application prospect.
Description
Technical Field
The invention relates to the technical field of copper pipe processing, in particular to a welding method and a welding assembly for a refrigeration copper pipe.
Background
All parts in the air conditioner are connected through copper pipes and then are completely sealed to form a pipeline. The 'refrigerant' is sealed in the pipeline, the pipeline is welded during the welding work of the refrigeration copper pipe, the 'refrigerant' is kept not to leak in the flowing process of the pipeline, the quality of the air conditioner is improved, and the influence on the environment is reduced.
Copper pipes are generally welded by brazing, which is a welding method for forming a firm joint by filling a gap surface of a brazed metal joint surface with liquid brazing filler metal, and the process must have two basic conditions. a) The liquid solder can wet the brazing metal and can compactly fill all gaps; b) the liquid brazing filler metal and the brazing metal perform necessary physical and chemical reactions to achieve good intermetallic bonding.
The copper pipe is at the welding process of brazing, at first use flame to heat in copper pipe one side, heat to certain extent when the copper pipe, use brazing filler metal strip contact copper pipe at the opposite side of copper pipe, the brazing filler metal strip melts at the colder layer, after forming brazing filler metal liquid, because capillary action, gradually move to the hotter side from the colder layer side of brazing filler metal liquid copper pipe, finally fill up whole copper pipe clearance, at this welding method in-process, the welding liquid needs to carry out more radial movement and axial displacement, the phenomenon that welding gap department solder is not full enough appears easily, in the welding process of copper pipe brazing, the control of its solder volume relies on workman's experience more, the beading can appear too much of solder, the solder is not enough then leads to the welding abundant, influence welding quality.
Disclosure of Invention
The invention aims to solve the problem that the welding flux at the welding gap is not full enough in the prior art, and provides a welding method and a welding assembly for a refrigeration copper pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
a welding method for a refrigeration copper pipe comprises the following steps:
s1: inserting the welding part of the inner copper pipe into the outer copper pipe, and forming a welding gap between the outer wall of the inner copper pipe and the inner wall of the outer copper pipe;
s2: uniformly heating the lower end of the welding gap to melt the standard amount of welding flux at the upper end of the welding gap to form welding liquid;
s3: when the welding liquid flows downwards in the welding gap, the welding liquid is triggered, so that the welding gap is uniformly filled with the welding liquid.
The standard quantity of the solder is as follows: the volume of the welding rod melted is the same as the volume of the welding gap, i.e. the cross-sectional area and length of the welding rod are equal to the volume of the welding gap. The standard amount of solder is used for keeping the amount of the soldering liquid matched with the direction of the soldering gap, so that the phenomenon that the soldering liquid is insufficient or the soldering liquid is excessive and is kept at the bottom of the soldering gap to form a tumor is avoided.
The welding assembly for the refrigeration copper pipe based on the welding method for the refrigeration copper pipe comprises a support frame, an upper clamping piece, a lower clamping piece, a welding rod clamp, a heating nozzle and a shaking box, wherein the upper clamping piece is positioned on the support frame and used for clamping the inner copper pipe, the lower clamping piece is used for clamping the outer copper pipe, the welding rod clamp is used for clamping the welding rod, and the shaking box is used for shaking the welding. The clamping center points of the upper clamping piece and the lower clamping piece are on the same vertical straight line, the heating nozzle can spray flame for heating the copper pipe and the shaking box, and the shaking box is used for touching the welding liquid.
Furthermore, the lower part of the support frame is provided with an annular lower sliding block, the inner wall of the lower sliding block is provided with a plurality of heating nozzles which are uniformly distributed, the lower sliding block is provided with an installation base, one side of the installation base is fixedly provided with a suspension, one end of the suspension is movably connected with a shaking box, the lower end of the suspension is fixedly connected with the lower sliding block, the upper end of the suspension is provided with a moving block, a flexible hanging chain is arranged between the moving block and the shaking box, a buffer part is arranged between the moving block and the suspension, and the buffer part can be a damping spring.
Furthermore, a contact head is arranged on one side of the shaking box, a horizontal telescopic rod and a pressing piece used for pressing the contact head on the outer copper pipe are arranged between the shaking box and the contact head, the telescopic rod is formed by sleeving a plurality of cylinders, and the pressing piece is a pressing spring.
Further, the interior of the shaker box is filled with water, which reduces the pressure in the shaker box in order to facilitate boiling of the water in the shaker box. The floating ball is arranged in the shaking box, a plurality of particles are arranged in the floating ball, the particles apply sinking force to the floating ball, and when the floating ball is completely immersed in the water in the shaking box, the floating ball can float in the water in the shaking box in a stationary manner.
Furthermore, a plurality of upper sliding blocks which are uniformly distributed are arranged on the upper portion of the supporting frame, and a horizontal feeding oil cylinder is arranged between each upper sliding block and the corresponding welding rod clamp and used for adjusting the position of each welding rod.
The working process of the refrigeration copper pipe welding assembly is as follows:
the method comprises the following steps: and calculating the volume of the welding gap by combining the outer diameter of the inner copper pipe and the inner diameter of the outer copper pipe to obtain the solder with standard quantity, thereby obtaining the target melting length of the welding rod, and installing the welding rod on the welding rod clamp.
Step two: the upper clamping piece is used for clamping the inner copper pipe, the lower clamping piece is used for clamping the outer copper pipe, the upper clamping piece and the lower clamping piece move close to each other, so that the inner copper pipe is inserted into the outer copper pipe, a welding gap is formed between the outer wall of the inner copper pipe and the overlapping part of the inner wall of the outer copper pipe, the position of the lower sliding block is adjusted simultaneously, the heating nozzle is aligned to the lower part of the welding gap, and the contact head is attached to the outer wall of the outer copper pipe.
Step three: opening the heating nozzle, heating the outer part of the outer copper pipe by flame sprayed by the heating nozzle, driving the upper sliding block and the feeding oil cylinder when the copper pipe is heated to a proper temperature, enabling one end of the welding rod to be positioned at an inlet at the upper end of the welding gap, melting the end part of the welding rod under the influence of the heat pipe, and reducing the flame of the heating nozzle to enable the welding rod to form continuous heat supply for the shaking box;
when the copper pipe is heated by flame, the flame heats water in the shaking box, so that the water in the shaking box boils, the floating ball floats in the shaking box, the shaking box shakes, the shaking is transmitted to the outer copper pipe through a contact head pressed on the outer copper pipe, and the welding liquid in the welding gap is touched, so that the welding liquid can uniformly reach all parts of the welding gap, and the welding is full.
Step four: the feeding oil cylinder works all the time, the welding rod is kept continuously fed, the welding rod is continuously melted and enters the welding gap until the melting amount of the welding rod reaches the standard amount, and in the process, the lower sliding block drives the shaking box to continuously move downwards to touch the welding liquid in the welding gap from top to bottom.
Step five: and when the standard amount of the welding liquid completely enters the welding gap, stopping heating the nozzle to supply heat to the shaking box.
The invention has the beneficial effects that:
1. the welding method and the welding assembly for the refrigeration copper pipe are used for welding the refrigeration copper pipe, the lower end of a welding gap of the copper pipe is heated, and the welding liquid only needs to move axially and move slightly radially, so that the welding liquid at the upper end flows down uniformly, the flowing speed of the welding liquid is accelerated, the welding efficiency is improved, the welding liquid is filled in the welding gap uniformly, the welding quality is improved, and the welding assembly is simple in structure, convenient to implement and wide in application prospect.
2. This refrigeration copper pipe welding subassembly is through water as the medium, utilizes the heat of copper pipe heating to obtain the kinetic energy that makes the welding liquid shake, has realized the make full use of the energy.
Drawings
FIG. 1 is a step diagram of the welding method for the refrigeration copper pipe;
FIG. 2 is a schematic structural diagram of the welding assembly of the refrigeration copper pipe;
FIG. 3 is a schematic structural view of the welded assembly A of the refrigeration copper pipe;
FIG. 4 is a schematic structural view of the cooling copper pipe welding assembly viewed from above at the position of a heating nozzle;
FIG. 5 is a schematic view of the shaking box of the welding assembly of the refrigeration copper pipe.
In the figure: 1. a support frame; 2. an upper clamping member; 3. a lower clamping member; 4. a lower slide block; 5. heating the nozzle; 6. a jitter box; 7. a welding rod clamp; 8. an inner copper tube; 9. an outer copper tube; 10. a suspension; 11. an upper slide block; 12. a feeding oil cylinder; 13. welding a rod; 14. installing a base; 15. a contact head; 16. welding a gap; 17. a moving block; 18. a buffer member; 19. a chain is hung; 20. a telescopic rod; 21. applying a pressing piece; 22. a floating ball.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1, a welding method for a refrigeration copper pipe includes the following steps:
s1: inserting the welding part of the inner copper pipe into the outer copper pipe, and forming a welding gap between the outer wall of the inner copper pipe and the inner wall of the outer copper pipe;
s2: uniformly heating the lower end of the welding gap to melt the standard amount of welding flux at the upper end of the welding gap to form welding liquid;
s3: when the welding liquid flows downwards in the welding gap, the welding liquid is triggered, so that the welding gap is uniformly filled with the welding liquid.
The standard quantity of the solder is as follows: the volume of the welding rod melted is the same as the volume of the welding gap, namely the length of the cross-sectional area of the welding rod is equal to the volume of the welding gap. The standard amount of solder is used for keeping the amount of the soldering liquid matched with the direction of the soldering gap, so that the phenomenon that the soldering liquid is insufficient or the soldering liquid is excessive and is kept at the bottom of the soldering gap to form a tumor is avoided.
Example 2
In the embodiment, a copper pipe welding assembly based on the above-mentioned refrigeration copper pipe welding method is disclosed, and referring to fig. 2, the copper pipe welding assembly includes a support frame 1, an upper clamping member 2 positioned on the support frame 1 and used for clamping an inner copper pipe 8, a lower clamping member 3 positioned on the support frame 1 and used for clamping an outer copper pipe 9, a welding rod clamp 7 for clamping a welding rod 13, a heating nozzle 5, and a shaking box 6. The clamping center points of the upper clamping piece 2 and the lower clamping piece 3 are on the same vertical straight line, the upper clamping piece 2 and the lower clamping piece 3 are connected with the support frame 1 in a sliding mode, the heating nozzle 5 can spray flame for heating the copper pipe, and the shaking box 6 is used for touching welding liquid.
Further, the lower portion of the support frame 1 is provided with an annular lower slider 4, referring to fig. 3, 4 and 5, the inner wall of the lower slider 4 is provided with a plurality of uniformly arranged heating nozzles 5, the lower slider 4 is provided with an installation base 14, one side of the installation base 14 is fixedly provided with a suspension 10, one end of the suspension 10 is movably connected with a shaking box 6, the lower end of the suspension 10 is fixedly connected with the lower slider 4, the upper end of the suspension 10 is provided with a moving block 17, a flexible hanging chain 19 is arranged between the moving block 17 and the shaking box 6, a buffer 18 is arranged between the moving block 17 and the suspension 10, and the buffer 18 can be a damping spring.
Further, a contact head 15 is arranged on one side of the shaking box 6, a horizontal telescopic rod 20 and a pressing piece 21 used for pressing the contact head 15 on the outer copper tube 9 are arranged between the shaking box 6 and the contact head 15, the telescopic rod 20 is formed by sleeving a plurality of cylinders, and the pressing piece 21 is a pressing spring. In this embodiment, a limiting component (not shown) is disposed between the contact 15 and the shaking box 6, and is used for compressing the pressing spring 21 when the shaking box 6 is not in operation, and releasing the pressing spring 21 when the shaking box 6 is in operation, so that the contact 15 is attached to the outer wall of the outer copper pipe 9.
Further, the inside of the shake box 6 is filled with water, and the pressure in the shake box 6 is lowered in order to make the water in the shake box 6 easily boil. The floating ball 22 is arranged in the shaking box 6, a plurality of particles are arranged in the floating ball 22, the particles apply sinking force to the floating ball 22, and when the floating ball 22 is completely immersed in the water in the shaking box 6, the floating ball 22 can float in the water in the shaking box 6.
Furthermore, a plurality of upper sliding blocks 11 which are uniformly distributed are arranged on the upper portion of the supporting frame 1, and a horizontal feeding oil cylinder 12 is arranged between the upper sliding blocks 11 and the welding rod clamp 7 and used for adjusting the position of a welding rod 13.
The working process of the refrigeration copper pipe welding assembly in the embodiment is as follows:
the method comprises the following steps: the volume of the welding gap 16 is calculated by combining the outer diameter dimension of the inner copper pipe 8 and the inner diameter dimension of the outer copper pipe 9 to obtain a standard amount of solder, thereby obtaining a target melting length of the welding rod 13, and the welding rod 13 is mounted on the welding rod fixture 7.
Step two: the upper clamping piece 2 is used for clamping the inner copper pipe 8, the lower clamping piece 3 is used for clamping the outer copper pipe 9, the upper clamping piece 2 and the lower clamping piece 3 move close to each other, so that the inner copper pipe 8 is inserted into the outer copper pipe 9, a welding gap 16 is formed between the outer wall of the inner copper pipe 8 and the overlapped part of the inner wall of the outer copper pipe 9, the position of the lower sliding block 4 is adjusted at the same time, the heating nozzle 5 is aligned to the lower part of the welding gap 16, the pressure spring 21 is loosened, and the contact head 15 is attached to the outer wall of the outer copper pipe 9.
Step three: opening the heating nozzle 5, heating the outer part of the outer copper pipe 9 by flame sprayed by the heating nozzle 5, driving the upper slide block 11 and the feeding oil cylinder 12 when the copper pipe is heated to a proper temperature, enabling one end of the welding rod 13 to be positioned at an inlet at the upper end of the welding gap 16, melting the end part of the welding rod 13 under the influence of the heat pipe, and reducing the flame of the heating nozzle 5 to enable the flame to continuously supply heat to the shaking box 6;
when the copper pipe is heated by flame, the flame heats the water in the shaking box 6, so that the water in the shaking box 6 is boiled, the floating ball 22 sinks and floats in the shaking box 6, the shaking box 6 shakes, the shake is transmitted to the outer copper pipe 9 through the contact head 15 pressed on the outer copper pipe 9, the welding liquid in the welding gap 16 is touched, and the welding liquid can uniformly reach all parts of the welding gap, so that the welding is full.
Step four: the feeding oil cylinder 12 works all the time, the welding rod 13 is kept continuously fed, the welding rod 13 is continuously melted and enters the welding gap 16 until the melting amount of the welding rod reaches a standard amount, and in the process, the lower sliding block 14 drives the shaking box 6 to continuously move downwards to touch the welding liquid in the welding gap 16 from top to bottom.
Step five: when the standard amount of the welding liquid completely enters the welding gap 16, the heating of the shaking box 6 by the heating nozzle 5 is stopped.
The welding method and the welding assembly for the refrigeration copper pipe are used for welding the refrigeration copper pipe, the lower end of a welding gap of the copper pipe is heated, welding liquid at the upper end flows downwards uniformly, the flowing speed of the welding liquid is accelerated, the welding efficiency is improved, the welding gap is filled with the welding liquid uniformly, the welding quality is improved, and the welding assembly is simple in structure, convenient to implement and wide in application prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A welding method for a refrigeration copper pipe is characterized by comprising the following steps:
s1: inserting the welding part of the inner copper pipe into the outer copper pipe, and forming a welding gap between the outer wall of the inner copper pipe and the inner wall of the outer copper pipe;
s2: uniformly heating the lower end of the welding gap to melt the standard amount of welding flux at the upper end of the welding gap to form welding liquid;
s3: when the welding liquid flows downwards in the welding gap, the welding liquid is triggered, so that the welding gap is uniformly filled with the welding liquid.
2. A refrigeration copper pipe welding assembly based on the refrigeration copper pipe welding method of claim 1 is characterized by comprising a support frame (1), an upper clamping piece (2) which is positioned on the support frame (1) and used for clamping an inner copper pipe (8), a lower clamping piece (3) used for clamping an outer copper pipe (9), a welding rod clamp (7) used for clamping a welding rod (13), a heating nozzle (5) and a shaking box (6);
the lower part of the support frame (1) is provided with an annular lower sliding block (4), the inner wall of the lower sliding block (4) is provided with a plurality of heating nozzles (5) which are uniformly distributed, the lower sliding block (4) is provided with an installation base (14), one side of the installation base (14) is fixedly provided with a suspension (10), one end of the suspension (10) is movably connected with a shaking box (6), one side of the shaking box (6) is provided with a contact head (15), a horizontal telescopic rod (20) and a pressing piece (21) for pressing the contact head (5) on an outer copper pipe (9) are arranged between the shaking box (6) and the contact head (15);
the upper portion of support frame (1) sets up a plurality of evenly distributed's top shoe (11), set up horizontally pay-off hydro-cylinder (12) between top shoe (11) and welding rod anchor clamps (7).
3. The welding assembly for the refrigeration copper pipes according to claim 2 is characterized in that the lower end of the suspension (10) is fixedly connected with the lower sliding block (4), the upper end of the suspension (10) is provided with a moving block (17), a flexible suspension chain (19) is arranged between the moving block (17) and the shaking box (6), and a buffer (18) is arranged between the moving block (17) and the suspension (10).
4. A refrigerated copper tube welding assembly according to claim 3 wherein a floating ball (22) is provided inside the jitter box (6), and a plurality of particles are provided inside the floating ball (22).
5. A welded assembly according to claim 4, wherein the float (22) is adapted to float at rest in the water in the jitter box (6) when the float (22) is fully immersed in the water in the jitter box (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011465563.XA CN112658421A (en) | 2020-12-14 | 2020-12-14 | Welding method and welding assembly for refrigeration copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011465563.XA CN112658421A (en) | 2020-12-14 | 2020-12-14 | Welding method and welding assembly for refrigeration copper pipe |
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| Publication Number | Publication Date |
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| CN112658421A true CN112658421A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011465563.XA Withdrawn CN112658421A (en) | 2020-12-14 | 2020-12-14 | Welding method and welding assembly for refrigeration copper pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993541Y (en) * | 2006-12-22 | 2007-12-19 | 唐威力 | Copper-aluminium welded combined heat exchanger pipe fitting |
| CN101230860A (en) * | 2008-01-24 | 2008-07-30 | 广东美芝制冷设备有限公司 | Exhaust tube for air-conditioner compressor as well as manufacturing and assembling method thereof |
| CN102581414A (en) * | 2012-03-16 | 2012-07-18 | 李明雨 | Method for brazing copper aluminum tubes without aid of brazing flux |
| CN103343847A (en) * | 2013-07-09 | 2013-10-09 | 扬州红人实业有限公司 | Copper aluminum tube and welding process thereof |
| US20140042211A1 (en) * | 2012-08-08 | 2014-02-13 | Alstom Technology Ltd | Method and system for welding conduits |
| CN104625287A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | Copper pipe braze welding technology |
| CN204913086U (en) * | 2015-08-03 | 2015-12-30 | 广东五星太阳能股份有限公司 | Three expand copper brazing interface to taking over |
| CN105583541A (en) * | 2016-01-26 | 2016-05-18 | 南京西百客汽车空调有限公司 | Welding process of two-device piping |
| CN207864822U (en) * | 2018-02-11 | 2018-09-14 | 林文运 | A kind of stainless steel tube soldering connecting structure of combustion gas/water supply pipe |
-
2020
- 2020-12-14 CN CN202011465563.XA patent/CN112658421A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993541Y (en) * | 2006-12-22 | 2007-12-19 | 唐威力 | Copper-aluminium welded combined heat exchanger pipe fitting |
| CN101230860A (en) * | 2008-01-24 | 2008-07-30 | 广东美芝制冷设备有限公司 | Exhaust tube for air-conditioner compressor as well as manufacturing and assembling method thereof |
| CN102581414A (en) * | 2012-03-16 | 2012-07-18 | 李明雨 | Method for brazing copper aluminum tubes without aid of brazing flux |
| US20140042211A1 (en) * | 2012-08-08 | 2014-02-13 | Alstom Technology Ltd | Method and system for welding conduits |
| CN103343847A (en) * | 2013-07-09 | 2013-10-09 | 扬州红人实业有限公司 | Copper aluminum tube and welding process thereof |
| CN104625287A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | Copper pipe braze welding technology |
| CN204913086U (en) * | 2015-08-03 | 2015-12-30 | 广东五星太阳能股份有限公司 | Three expand copper brazing interface to taking over |
| CN105583541A (en) * | 2016-01-26 | 2016-05-18 | 南京西百客汽车空调有限公司 | Welding process of two-device piping |
| CN207864822U (en) * | 2018-02-11 | 2018-09-14 | 林文运 | A kind of stainless steel tube soldering connecting structure of combustion gas/water supply pipe |
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Application publication date: 20210416 |