CN210060053U - Welding position structure of copper pipe - Google Patents

Welding position structure of copper pipe Download PDF

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Publication number
CN210060053U
CN210060053U CN201920374161.5U CN201920374161U CN210060053U CN 210060053 U CN210060053 U CN 210060053U CN 201920374161 U CN201920374161 U CN 201920374161U CN 210060053 U CN210060053 U CN 210060053U
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China
Prior art keywords
welding
copper pipe
port
reservoir
axial strip
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CN201920374161.5U
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Chinese (zh)
Inventor
雒应学
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Maanshan Deshan Metal Forming Technology Co Ltd
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Maanshan Deshan Metal Forming Technology Co Ltd
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Abstract

The utility model discloses a welding position structure of copper pipe, adopt the reservoir that the copper pipe was made including welding copper pipe and port, the welding end of welding copper pipe stretches into the interior solder filling space that forms of port copper pipe of reservoir, the interval is equipped with the axial strip arch of the port copper intraductal wall butt of many and reservoir on the welding end perisporium of welding copper pipe, the welding port of welding copper pipe is equipped with the flaring portion, the external diameter of flaring portion is consistent with the internal diameter of the port copper pipe of reservoir and adjusts well with the welding position center when ensureing that the pre-installation inserts, form simultaneously and use the sealed position of flaring portion circumference as the benchmark, molten solder and other foreign matters fall into inside the reservoir main part when can preventing to weld. In addition, the plurality of axial strip-shaped protrusions on the circumferential wall of the welding end of the welding copper pipe can ensure that the preassembled welding copper pipe cannot swing and deviate during welding, the center is always kept aligned and enough space is reserved for guiding the solder to flow in, sufficient solder is ensured to be filled, and internal cold welding and empty welding are avoided.

Description

Welding position structure of copper pipe
Technical Field
The utility model relates to the field of welding technique, in particular to welding bit architecture of copper pipe.
Background
In the refrigeration industry, in order to ensure the chemical stability of the refrigerant and the realizability and reliability of the internal structure of the equipment, copper tubes are adopted for all refrigeration circulation pipelines. In order to ensure the sealing performance of the pipeline, the welding position of each copper pipe adopts a large pipe sleeve and a small pipe, and then the welding position is formed by silver brazing. A gap of 0.05-0.3 mm is reserved between the large pipe and the small pipe, and the gap is used for enabling silver brazing solder to enter the sleeve along the gap in a burning state so as to ensure that the refrigerant does not leak and runs durably at high temperature and high pressure. There are two types of welding positions commonly used at present: straight copper pipe welding position and netted annular knurl copper pipe welding position.
As shown in fig. 1, the straight copper pipe welding position refers to vertically inserting and pre-assembling two copper pipes, and then manually welding. The disadvantages are as follows:
1. the straight copper tube 3 is easy to cause poor circulation of other pipelines because molten solder is easy to flow into the liquid storage device 2 when the welding gap is ensured;
2. because a gap is required between the two pipes, the centers of the two pipes cannot be ensured to be aligned during preassembly before welding, so that the two pipe walls are directly and tangentially attached to each other, and the welding in such a state easily causes steam leakage under high pressure. Therefore, the method has high fraction defective and the manual alignment is necessary during welding. Automatic welding cannot be realized.
As shown in fig. 2, the welding position of the net-shaped knurled copper pipe is that net-shaped knurls 5 are made on the cylindrical surface of the welding end of the inserted copper pipe, the outer diameter size after the knurls is consistent with the inner diameter of a welded product of the liquid storage device 2, the net-shaped knurl copper pipe 4 is completely inserted into a welding port during preassembling, and then manual welding is carried out. The purpose of the net knurl 5 is to fill the gap between the two tubes by the height of the net knurl 5 to ensure that the two tubes are aligned in the center and the gap can be filled with solder. The disadvantages are as follows:
1. during welding, the reticular knurled copper pipe 4 also has little molten solder which easily flows into the liquid storage device 2 and is easily sucked into the compressor to cause abrasion or blocking of the compressor;
2. because the lines of the net knurls 5 are staggered, solder is difficult to flow in sometimes, a cold solder is formed only by accumulation on the surface, and the high pressure resistance is not realized, so that the defect rate is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a welding bit architecture of copper pipe to solve the problem that proposes among the above-mentioned background art.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a welding position structure of copper pipe, adopts the reservoir that the copper pipe was made including welding copper pipe and port, the welding end of welding copper pipe stretches into the interior solder filling space that forms of port copper pipe of reservoir, the interval is equipped with the axial strip arch of many and the port copper intraductal wall butt of reservoir on the welding end perisporium of welding copper pipe, the welding port of welding copper pipe is equipped with flaring portion, the external diameter of flaring portion is unanimous with the internal diameter of the port copper pipe of reservoir.
Further, the width of the axial strip-shaped protrusion gradually decreases from the inner side to the outer side.
Further, the length of the axial strip-shaped protrusion is 1/3-1/2 of the length of the welding bit.
Furthermore, the number of the axial strip-shaped bulges is 4 or 6 and the axial strip-shaped bulges are symmetrically distributed.
Further, the height of the axial strip-shaped protrusions is 0.05-0.3 mm.
Furthermore, the excircle of the flared part is annular.
The utility model discloses following beneficial effect has:
1. the outer diameter of the flared part of the welding copper pipe is consistent with the inner diameter of the port copper pipe, so that the center of a welding position can be aligned when the welding copper pipe is preassembled and inserted, and meanwhile, a sealing position taking the circumference of the flared part as a reference is formed, and molten welding flux and other foreign matters can be prevented from falling into the liquid storage device main body during welding.
2. The axial strip-shaped bulges abutted to the inner wall of the port copper pipe of the liquid reservoir are arranged on the circumferential wall of the welding end of the welding copper pipe at intervals, so that the preassembled welding copper pipe cannot swing and deviate during welding, the center is always kept aligned and enough space is provided for guiding solder to flow in, sufficient solder is ensured to be filled, and internal cold welding and air welding are avoided.
3. Because the stability of the relative position of preassembly is guaranteed, automatic pipe loading and welding can be realized, the production efficiency is improved, the labor is saved, and the stability of the product quality is guaranteed.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic view of welding using a straight copper tube welding site;
FIG. 2 is a schematic view of welding with a mesh knurled copper tube welding site;
FIG. 3 is a schematic view of welding by using the welding position structure of the present invention;
FIG. 4 is a schematic sectional view A-A of FIG. 3;
FIG. 5 is a pre-assembly diagram of the welding position structure of the present invention;
fig. 6 is a schematic view of solder filling for welding by using the welding position structure of the present invention.
Detailed Description
Referring to fig. 3 to 6, the utility model relates to a welding position structure of copper pipe, adopt the reservoir 2 that the copper pipe was made including welding copper pipe 1 and port, the welding end of welding copper pipe 1 stretches into the interior solder filling space that forms of port copper pipe 21 of reservoir 2, the interval is equipped with many axial strip archs 11 with the port copper pipe 21 inner wall butt of reservoir 2 on the welding end perisporium of welding copper pipe 1, the protruding 11 accessible annular knurl technology processing of axial strip forms, preferably, the height of axial strip arch 11 is 0.05 ~ 0.3mm, it is corresponding with the clearance of leaving 0.05 ~ 0.3mm between the conventional welded big or small pipe, the welding port of welding copper pipe 1 is equipped with flaring portion 12, the external diameter of flaring portion 12 is unanimous with the internal diameter of the port copper pipe 21 of reservoir 2. The welding port of the welded copper pipe 1 is subjected to rounding treatment after the flaring part 12 is formed through flaring treatment so that the excircle of the flaring part 12 is in a circular ring shape, thus the cambered surface can be used for guiding when the copper pipe is inserted in a preassembling way, and meanwhile, the friction is reduced because the cambered surface is in line contact with the inner circle surface, and foreign matters such as copper powder and copper scraps generated by friction are avoided.
Since the outer diameter of the flared portion 12 is equal to the inner diameter of the port copper tube 21, the center of the welding position can be ensured to be aligned when pre-inserting, and a sealing position with the circumference of the flared portion 12 as a reference is formed, thereby preventing molten solder and other foreign matters from falling into the main body of the liquid reservoir 2 during welding. A plurality of axial strip-shaped bulges 11 which are abutted against the inner wall of the port copper pipe 21 of the liquid storage device 2 are arranged on the circumferential wall of the welding end of the welding copper pipe 1 at intervals, so that the preassembled welding copper pipe 1 can not swing and deviate during welding, and the center alignment and enough space for guiding the solder to flow in are always kept. Because the stability of the relative position of preassembly is guaranteed, automatic pipe loading and welding can be realized, the production efficiency is improved, the labor is saved, and the stability of the product quality is guaranteed.
As the utility model discloses a preferred, the width of axial strip arch 11 diminishes from inboard to the outside gradually, specifically, the outside forms most advanced so that support the contact with the port copper pipe 21 inner wall of reservoir 2 to guarantee that the welding copper pipe of pre-installation can not take place to wave the off normal when the welding.
As the utility model discloses a preferred, the protruding length of axial strip 11 is 1/3 ~ 1/2 of the long length of welding bit, through the protruding length of control axial strip 11, guarantees to leave the solder between protruding 11 of axial strip and the flaring portion 12 and fills the clearance, ensures to have sufficient solder to fill in town, avoids inside rosin joint, empty solder joint.
As an optimization of the utility model, the quantity of axial strip arch 11 is 4 or 6 and symmetric distribution, makes the contact between the port copper pipe 21 of welding copper pipe 1 and reservoir 2 more firm.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims (6)

1. The utility model provides a welding position structure of copper pipe, adopts reservoir (2) that the copper pipe was made including welding copper pipe (1) and port, the welding end of welding copper pipe (1) stretches into port copper pipe (21) of reservoir (2) and forms solder filling space, its characterized in that: the welding structure is characterized in that a plurality of axial strip-shaped protrusions (11) abutted to the inner wall of the port copper pipe (21) of the liquid storage device (2) are arranged on the circumferential wall of the welding end of the welding copper pipe (1) at intervals, an expanded part (12) is arranged at the welding end of the welding copper pipe (1), and the outer diameter of the expanded part (12) is consistent with the inner diameter of the port copper pipe (21) of the liquid storage device (2).
2. A welded structure of a copper pipe as claimed in claim 1, wherein: the width of the axial strip-shaped protrusion (11) is gradually reduced from the inner side to the outer side.
3. A welded structure of a copper pipe as claimed in claim 1, wherein: the length of the axial strip-shaped protrusion (11) is 1/3-1/2 of the length of the welding bit.
4. A welded structure of a copper pipe as claimed in claim 1, wherein: the number of the axial strip-shaped bulges (11) is 4 or 6 and the axial strip-shaped bulges are symmetrically distributed.
5. A welded structure of a copper pipe as claimed in claim 1, wherein: the height of the axial strip-shaped protrusions (11) is 0.05-0.3 mm.
6. A welded structure of a copper pipe as claimed in claim 1, wherein: the excircle of the flared part (12) is in a circular ring shape.
CN201920374161.5U 2019-03-20 2019-03-20 Welding position structure of copper pipe Active CN210060053U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920374161.5U CN210060053U (en) 2019-03-20 2019-03-20 Welding position structure of copper pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920374161.5U CN210060053U (en) 2019-03-20 2019-03-20 Welding position structure of copper pipe

Publications (1)

Publication Number Publication Date
CN210060053U true CN210060053U (en) 2020-02-14

Family

ID=69434747

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920374161.5U Active CN210060053U (en) 2019-03-20 2019-03-20 Welding position structure of copper pipe

Country Status (1)

Country Link
CN (1) CN210060053U (en)

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