CN100446920C - Pipe end seal method - Google Patents
Pipe end seal method Download PDFInfo
- Publication number
- CN100446920C CN100446920C CNB2006100015892A CN200610001589A CN100446920C CN 100446920 C CN100446920 C CN 100446920C CN B2006100015892 A CNB2006100015892 A CN B2006100015892A CN 200610001589 A CN200610001589 A CN 200610001589A CN 100446920 C CN100446920 C CN 100446920C
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- CN
- China
- Prior art keywords
- pipe
- welding
- tube
- section
- sealing cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 72
- 238000003466 welding Methods 0.000 claims abstract description 58
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 4
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 239000010951 brass Substances 0.000 claims abstract description 4
- 238000005219 brazing Methods 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 210000004907 gland Anatomy 0.000 abstract 4
- 239000011148 porous material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to a tube end seal method which comprises the following procedures: procedure (1) the tube wall of the end opening of the tube surrounds the direction of a circumferential tube shaft to be bent, a smooth surface is formed on the external side of the tube, and the cross section of a tube end and a shaft line form an included angle; procedure (2) the tube and a sealing gland of the cross section are welded together. The included angle in the procedure (1) ranges from 15 to 80 degrees, the welding contact of the tube and the sealing gland is line contact or surface contact, the tube is circular, or elliptical, etc., the sealing gland can be provided with thread connection pores, the tube and the sealing gland can be made of steel, or stainless steel, or brass, or aluminium alloys, and argon arc welding, or resistance welding, or brazing is utilized by the method. Therefore, the tube end seal method of the present invention adopts the procedures that the tube end is bent inwards, and then, the tube end is sealed; thus, welding parts and edge angles do not need grinding, and thereby, the tube produced by the method has the advantages of time and cost saving.
Description
Technical Field
The invention relates to a method for sealing a pipe end, in particular to a method for sealing and welding a pipe end after the pipe end is bent inwards.
Background
With the development of times, the fields of using the pipe materials in life and work are more and more, and the use amount is larger and larger, so how to quickly and efficiently manufacture the pipe materials becomes an important subject in front of people.
In the manufacturing of pipe fittings, pipes are used, which are usually unsealed, so that pipe ends, especially pipes with larger caliber, are often needed to be sealed, because the pipes with smaller caliber are convenient and quick to seal, but for the pipes with larger caliber, a complicated sealing operation is needed, as shown in fig. 1 and fig. 2, the structure of the existing pipe end sealing method is schematically shown, the existing pipe end sealing method is to weld or braze a flat plate 90 or a prefabricated cover 91 directly with a straight pipe 92, and then polish edges and corners of the welded part and the end smoothly, which is convenient for the subsequent spraying of the surface of the pipe fitting and makes the pipe fitting beautiful.
Therefore, the existing pipe end sealing method needs welding, after welding, the edges and corners of the welding position are more, sometimes the end has edges and corners, and then the pipe end sealing method can be used later only by polishing,
therefore, the conventional method for sealing the pipe end has a large grinding amount for the edges and corners of the welded joint and the end, which takes labor, welding materials and grinding materials, and thus, the time cost and the economic cost are high.
Disclosure of Invention
The invention aims to provide a method for sealing a pipe end, which can save time cost and economic cost, aiming at the defects of the existing method for sealing the pipe end and the pipe.
In order to achieve the aim, the invention provides a pipe end sealing method, which comprises the following steps:
and 2, welding the pipe and the sealing cover with the flat section together.
The included angle in the step 1 is 15-80 degrees. The step 2 may specifically be: and stamping the sealing cover into a flat plate, and then welding the sealing cover and the pipe together, wherein during welding, the flat section of the sealing cover and the inner wall and the outer wall of the section of the pipe end are in line contact welding. And the step 2 can also be specifically as follows: and stamping the sealing cover into a flat plate, wherein the flat section of the sealing cover is an inclined plane, then welding the sealing cover and the pipe together, and during welding, the flat section of the sealing cover is in contact welding with the section surface of the pipe end. The step 2 may further specifically be: and stamping the sealing cover into a flat plate with a boss, welding the sealing cover and the pipe together, wherein during welding, the flat section of the sealing cover and the inner wall and the outer wall of the section of the pipe end are in line contact welding, and the outer edge of the boss is embedded into the pipe end. Another specific step 2 is: and stamping the sealing cover into a flat plate with a boss, wherein the inner edge of the flat plate is an inclined plane, then welding the sealing cover and the pipe together, and during welding, the inner edge of the flat plate is in contact welding with the section surface of the pipe end, and the outer edge of the boss is embedded into the pipe end. The pipe is a circular pipe or an oval pipe, the sealing cover is provided with a threaded connecting hole, the pipe and the sealing cover are made of steel or stainless steel or brass or aluminum alloy, and welding can be argon arc welding or resistance welding or brazing welding.
Therefore, the method for sealing the pipe end of the invention firstly bends the pipe end inwards and then seals the pipe, so that the welding part and the corner are not needed to be polished, and the manufactured pipe saves time cost and economic cost.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of a tube end sealed by a conventional tube end sealing method.
Figure 2 is another schematic diagram of a tube end sealing method in the prior art.
Figure 3 is a flow chart of the tube end sealing method of the present invention.
Figure 4 is a schematic view of the structure of the tube end sealing method of the present invention.
FIG. 5 is a schematic structural diagram of the tube end sealing method of the present invention 1.
Fig. 6 is a schematic diagram of the structure of the tube end sealing method of the present invention after welding shown in fig. 1.
FIG. 7 is a schematic structural diagram of the tube end sealing method of the present invention shown in FIG. 2.
Fig. 8 is a schematic diagram of the structure of the tube end sealing method of the present invention after welding in fig. 2.
FIG. 9 is a schematic structural diagram of the tube end sealing method of the present invention shown in FIG. 3.
Figure 10 is a schematic view of the structure of the tube end sealing method of the present invention after welding of figure 3.
FIG. 11 is a schematic structural diagram of the tube end sealing method of the present invention in FIG. 4.
Figure 12 is a schematic view of the structure of the tube end sealing method of the present invention after welding of figure 4.
Detailed Description
The pipe end is firstly bent inwards before being sealed, and then the pipe end is sealed without polishing, so that the cost of the manufactured pipe is saved.
As shown in fig. 3, a flow chart of the tube end sealing method of the present invention includes the following steps:
referring to fig. 4, which is a schematic structural view of the present invention, the angle θ between the line of the section 11 of the tube end 10 of the tube 1 and the axis may be 15 to 80 degrees, depending on the requirements of the manufacture; the pipe 1 can be a circular pipe or an oval pipe, the sealing cover 2 can be provided with a threaded connecting hole 20, and the pipe 1 and the sealing cover 2 are made of steel or stainless steel or brass or aluminum alloy;
the tube and the flat section closure are welded together, step 102.
The shape of the closure varies and the welding contact varies, and referring to fig. 5, which is a schematic structural diagram 1 of the tube end sealing method of the present invention, the closure 2 is first stamped into a flat plate, and then the closure 2 and the tube 1 are welded together, and during welding, the flat section 21 of the closure 2 and the inner wall 12 and the outer wall 13 of the tube end section 11 are welded in line contact. The welded tube is shown in figure 6 with the closure 2 flush with the outer edge of the tube 1 and without further grinding.
Referring to fig. 7, which is a schematic structural view 2 of the tube end sealing method of the present invention, the cap 2 is first stamped into a flat plate, the flat section 21 of the cap is an inclined plane, and then the cap 2 and the tube 1 are welded together, and during welding, the flat section 21 of the cap 2 and the tube end section 11 are welded in surface contact. The welded tube is shown in figure 8 with the closure 2 flush with the outer edge of the tube 1 and without further grinding.
Referring to fig. 9, which is a schematic structural view 2 of the tube end sealing method of the present invention, the cap 2 is stamped into a flat plate with a boss 22, and then the cap 2 and the tube 1 are welded together, during welding, the flat section 21 of the cap 2 and the inner wall 12 and the outer wall 13 of the tube end section 11 are welded by line contact, and the outer edge of the boss 22 is embedded into the tube end. The welded tube is shown in figure 10 with the closure 2 flush with the outer edge of the tube 1 and without further grinding.
Referring to fig. 11, which is a schematic structural diagram 3 of the tube end sealing method of the present invention, the sealing cap 2 is stamped into a flat plate with a boss 22, the inner edge 23 of the flat plate is an inclined surface, and then the sealing cap 2 and the tube 1 are welded together, during welding, the inner edge 23 of the flat plate is in surface contact welding with the cross section 11 of the tube end, and the outer edge of the boss 22 is embedded into the tube end. The welded tube is shown in figure 12 with the closure 2 flush with the outer edge of the tube 1 and without further grinding.
The welding method is various, and for example, argon arc welding, resistance welding, brazing or the like can be adopted.
Therefore, the method for sealing the pipe end of the invention firstly bends the pipe end inwards and then seals the pipe, thus reducing the grinding amount of the welding part and the edges and corners, and the manufactured pipe saves both time cost and economic cost.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A method of sealing a pipe end comprising the steps of:
step 1, bending the pipe wall of a pipe port in the circumferential pipe axial direction, forming a smooth curved surface on the outer side of the pipe, and forming an included angle between the cross section of the pipe end and the axial line;
step 2, welding the tube and the flat-section cover together, wherein,
stamping the sealing cover into a flat plate, welding the sealing cover and the pipe together, and during welding, performing line contact welding between the flat section of the sealing cover and the inner wall and the outer wall of the section of the pipe end;
or,
stamping the sealing cover into a flat plate, wherein the flat section of the sealing cover is an inclined plane, then welding the sealing cover and the pipe together, and during welding, the flat section of the sealing cover is in contact welding with the section surface of the pipe end;
or,
stamping the sealing cover into a flat plate with a boss, welding the sealing cover and the pipe together, wherein during welding, the flat section of the sealing cover and the inner wall and the outer wall of the section of the pipe end are in line contact welding, and the outer edge of the boss is embedded into the pipe end;
or,
and stamping the sealing cover into a flat plate with a boss, wherein the inner edge of the flat plate is an inclined plane, then welding the sealing cover and the pipe together, and during welding, the inner edge of the flat plate is in contact welding with the section surface of the pipe end, and the outer edge of the boss is embedded into the pipe end.
2. The tube end sealing method of claim 1 wherein the included angle in step 1 is between 15 and 80 degrees.
3. The pipe end sealing method according to claim 1 or 2, wherein the pipe in the step 2 is a circular pipe or an oval pipe.
4. The tube end sealing method according to claim 1 or 2, wherein the cap in the step 2 has a screw coupling hole.
5. The tube end sealing method according to claim 1 or 2, wherein the tube and the cap in said step are steel or stainless steel or brass or an aluminum alloy.
6. The pipe end sealing method according to claim 1 or 2, wherein the welding in step 2 is argon arc welding or resistance welding or brazing welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100015892A CN100446920C (en) | 2006-01-24 | 2006-01-24 | Pipe end seal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100015892A CN100446920C (en) | 2006-01-24 | 2006-01-24 | Pipe end seal method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1803390A CN1803390A (en) | 2006-07-19 |
| CN100446920C true CN100446920C (en) | 2008-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100015892A Expired - Fee Related CN100446920C (en) | 2006-01-24 | 2006-01-24 | Pipe end seal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100446920C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106695149A (en) * | 2016-12-30 | 2017-05-24 | 马鞍山市瑞东仪表有限责任公司 | Anti-leakage welding process for high pressure spiral pipe free end of pressure gauge |
| CN108247176A (en) * | 2018-01-25 | 2018-07-06 | 江西昌河航空工业有限公司 | A kind of method for reducing Helicopter Main and subtracting strut welding deformation amount |
| CN111673220B (en) * | 2020-06-23 | 2022-03-29 | 西北有色金属研究院 | Method for brazing and sealing palladium alloy thin-walled tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823158A (en) * | 1997-03-04 | 1998-10-20 | Trw Inc. | Engine valve and method for making the same |
| CN1293092A (en) * | 2000-11-24 | 2001-05-02 | 陈佩芳 | Technology for welding thin-wall pipes |
| US6689981B1 (en) * | 2002-09-09 | 2004-02-10 | Delphi Technologies, Inc. | Method for metallurgically capping an end of a tube |
-
2006
- 2006-01-24 CN CNB2006100015892A patent/CN100446920C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823158A (en) * | 1997-03-04 | 1998-10-20 | Trw Inc. | Engine valve and method for making the same |
| CN1293092A (en) * | 2000-11-24 | 2001-05-02 | 陈佩芳 | Technology for welding thin-wall pipes |
| US6689981B1 (en) * | 2002-09-09 | 2004-02-10 | Delphi Technologies, Inc. | Method for metallurgically capping an end of a tube |
Non-Patent Citations (2)
| Title |
|---|
| 管件的摩擦封口工艺. 刘晖征.农机化研究，第2期. 2002 |
| 管件的摩擦封口工艺. 刘晖征.农机化研究，第2期. 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1803390A (en) | 2006-07-19 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20180124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |