CN209800948U - Steel anticorrosion elbow pipe without inner repaired mouth - Google Patents
Steel anticorrosion elbow pipe without inner repaired mouth Download PDFInfo
- Publication number
- CN209800948U CN209800948U CN201920307206.7U CN201920307206U CN209800948U CN 209800948 U CN209800948 U CN 209800948U CN 201920307206 U CN201920307206 U CN 201920307206U CN 209800948 U CN209800948 U CN 209800948U
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- China
- Prior art keywords
- pipe
- steel
- anticorrosive
- elbow
- liner
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 26
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 239000010935 stainless steel Substances 0.000 claims abstract description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 20
- 230000007797 corrosion Effects 0.000 claims abstract description 11
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 9
- 239000010962 carbon steel Substances 0.000 claims abstract description 9
- 239000003973 paint Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 6
- 210000002445 nipple Anatomy 0.000 claims description 5
- 229920006334 epoxy coating Polymers 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 12
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010923 batch production Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000011324 bead Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The utility model discloses an anticorrosive return bend of repaired mouth in steel is exempted from, include: the pipe joint comprises a base pipe, a stainless steel liner pipe, an inner seal weld and an outer seal weld, wherein the liner pipe is lined at one end of the base pipe, extends out of the pipe end of the base pipe, and is respectively sealed and welded relative to the combination parts of the inner end and the outer end of the base pipe to form the inner seal weld and the outer seal weld; two ends of the bent pipe are respectively welded with the carbon steel pipe orifice ends far away from the liner pipe on the two sections of short joints, and the inner wall and the outer wall of the bent pipe are coated with anticorrosive paint. Through the technical scheme of the utility model, realized the anticorrosive batch production of return bend and standardization, can on-the-spot direct welding installation, it is continuous intact to have avoided interior joint coating process and can realize intraductal anticorrosive coating, can solve the interior anticorrosive difficult problem of steel return bend especially small-bore steel return bend betterly, can prolong pipeline service life, reduces pipeline construction cost, reduces because of safety, the environmental protection risk that the interior corrosion of return bend bead arouses.
Description
Technical Field
The utility model relates to the technical field of pipeline, especially, relate to an anticorrosive return bend of repaired mouth in steel exempts from.
Background
In order to avoid corrosion of a strong corrosive medium to a steel pipeline and prolong the service life of the pipeline, the inner wall of a steel pipe needs to be subjected to anticorrosive treatment, and the conventional mode is to coat anticorrosive paint and is divided into factory prefabrication and field anticorrosion. In the prior art, the inner wall of a welding opening of a bent pipe cannot be subjected to anticorrosion joint coating operation after the pipe is welded and installed, and an inner joint coating of the welding opening of the bent pipe becomes an anticorrosion blind area in the whole pipe and is also an important factor for causing pipe leakage and influencing the service life of the pipe.
The prior art discloses a steel inner-corrosion-free repaired mouth bent pipe, which has the main technical scheme that: the stainless steel pipe comprises a section of bent pipe and four sections of short pipes, wherein two sections of short pipes are used as short pipes for field connection, a stainless steel layer is welded on the inner wall of one end of each short pipe, the ends, which are not welded, of the two sections of short pipes are connected to the two ends of the bent pipe in a welding mode, and then the inner wall and the outer wall of the bent pipe are subjected to anti-; when the on-site bent pipe is connected, the non-surfacing ends of the other two sections of short pipes are respectively welded to the straight pipe end, the inner wall of a weld crater is manually coated with an anticorrosion material, finally, the factory-anticorrosion bent pipe and the straight pipe end with the short pipes welded on the site are welded by a stainless steel welding material, and meanwhile, the factory performs stainless steel surfacing layers on the two ends of the bent pipe. The stainless steel layer which is welded on the weld joint in advance and the pipeline inner anticorrosive coating form a continuous inner anticorrosive coating, and the purpose of avoiding inner repaired mouth is realized.
the technical scheme has the defects that the steel inner-repaired-free anticorrosive bent pipe needs to be prefabricated by a factory and welded on site in an anticorrosive way, four welded junctions are added for each anticorrosive bent pipe compared with the finished bent pipe, stainless steel overlaying layers are prefabricated at two ends of the bent pipe, nondestructive testing cost is increased, an anticorrosive worker needs to perform inner-anticorrosive repair on the welded junctions of the short pipe and the straight pipe in site construction, rust removal quality and anticorrosive quality are difficult to guarantee, construction efficiency is reduced, and construction cost of a connecting head is increased.
SUMMERY OF THE UTILITY MODEL
at least one to the above-mentioned problem, the utility model provides an anticorrosive return bend of repaired mouth in steel exempts from, this anticorrosive return bend is by the return bend body, the nipple joint and the anticorrosive coating of one end in-band lining stainless steel pipe constitute, all accomplish at the mill's prefabrication, need not to carry out interior repaired mouth anticorrosion construction to the welded junction again after the field weld and can come into use, the anticorrosive batch production of return bend and standardization have been realized, can on-the-spot direct weld installation, it just can realize the intraductal anticorrosive coating continuity intact to have exempted from interior repaired mouth process, can solve the especially interior anticorrosive difficult problem of small-bore steel return bend of steel return bend betterly, can prolong pipeline service life, reduce pipeline construction cost, reduce the safety that arouses because of the inside corrosion of return bend welded junction, environmental protection risk.
In order to achieve the above object, the utility model provides an anticorrosive return bend of repaired mouth in steel exempts from, include: the pipe joint comprises a base pipe, a stainless steel liner pipe, an inner seal weld and an outer seal weld, wherein the liner pipe is lined in one end of the base pipe, extends out of the pipe end of the base pipe, and is respectively sealed and welded relative to the combination part of the inner end and the outer end of the base pipe to form the inner seal weld and the outer seal weld; and two ends of the bent pipe are respectively welded with the carbon steel pipe orifice ends of the two sections of the short sections, which are far away from the liner pipe, and the inner wall and the outer wall of the bent pipe are coated with anticorrosive paint.
In the above technical scheme, preferably, the inner and outer walls of the elbow are respectively coated with a two-component solvent-free liquid epoxy coating to form an inner anticorrosive layer and an outer anticorrosive layer, and the inner anticorrosive layer covers the inner seal-welding part.
In the above technical scheme, preferably, a groove convenient for welding is processed on the bent pipe, and the groove is butt-welded with the opening end of the carbon steel pipe.
in the above technical solution, preferably, the radius of the elbow is greater than or equal to 1.5 times of the pipe diameter of the elbow.
In the above technical solution, preferably, the length of the short section is greater than 1.5 times of the pipe diameter of the base pipe and is not less than 200 mm.
In the above technical solution, preferably, the liner tube is made of corrosion-resistant stainless steel, and has a tube wall thickness greater than or equal to 1.5 mm and a length of 120 mm.
In the above technical solution, preferably, the liner is lined in the base pipe by a mechanical composite method.
In the above technical solution, preferably, the thickness of the inner anticorrosive layer and the outer anticorrosive layer is not less than 200 μm.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The utility model has the advantages that the pipe nipple of two sections of stainless steel pipe with the inner lining is prefabricated to play the role of pre-mending the opening in the welding port of the pipeline, the stainless steel pipe with the inner lining of the pipe nipple avoids burning of the coating of the anti-corrosion bent pipe in the butt welding process of the pipeline, and the continuous integrity of the anti-corrosion layer in the pipeline is realized; after groove processing, the end without lining of the short section is welded to the two ends of the bent pipe, and then the inner wall and the outer wall of the bent pipe are subjected to anti-corrosion treatment, so that the problem of inner anti-corrosion joint coating of the welded joint of the bent pipe is solved;
(2) the two ends of the anti-corrosion bent pipe can be directly butt-welded with a straight bimetal composite pipe or a similar composite steel pipe joint in field welding construction, the anti-corrosion requirement of a butt-welding seam is ensured by using a stainless steel welding wire without argon filling welding, the procedure of repairing the opening in a pipeline welding opening is avoided, the industrialization and standardization of the anti-corrosion of the bent pipe are realized, and the quality can be detected and controlled; meanwhile, the construction efficiency of the pipeline is improved, the anticorrosion construction cost of the bent pipe is reduced, the service life of the pipeline is prolonged, the environmental protection and safety risks caused by corrosion and leakage of a welded joint of the bent pipe are reduced, and the bent pipe is particularly suitable for the corrosion prevention of the small-caliber steel bent pipe without an inner repaired mouth.
Drawings
Fig. 1 is a schematic structural view of a steel inner-coating-free anticorrosive elbow pipe according to an embodiment of the present invention;
fig. 2 is the utility model relates to an embodiment discloses a nipple joint's of anticorrosive return bend of repaired mouth in steel structure schematic diagram.
In the drawings, the correspondence between each component and the reference numeral is:
1. The pipe comprises a bent pipe, 2. a short section, 3. a base pipe, 4. a liner pipe, 5. inner seal welding, 6. outer seal welding, 7. a carbon steel pipe orifice, 8. a stainless steel pipe orifice, 9. an inner anticorrosive layer and 10. an outer anticorrosive layer.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention is described in further detail below with reference to the accompanying drawings:
As shown in fig. 1 and fig. 2, according to the utility model provides a anticorrosive return bend of repaired mouth in steel exempts from, include: the pipe joint comprises a base pipe, a stainless steel liner pipe, inner seal welding and outer seal welding, wherein the liner pipe is lined at one end of the base pipe, the liner pipe extends out of the pipe end of the base pipe, and the joint parts of the liner pipe relative to the inner end and the outer end of the base pipe are respectively sealed and welded by utilizing a TIG automatic welding machine to form the inner seal welding and the outer seal welding, so that a stainless steel pipe opening is formed at the end of the liner pipe of the pipe joint, and a carbon steel pipe opening is formed at the other; two ends of the bent pipe are respectively welded with the carbon steel pipe orifice ends far away from the liner pipe on the two sections of short joints, and the inner wall and the outer wall of the bent pipe are coated with anticorrosive paint.
In the above embodiment, preferably, the inner and outer walls of the elbow are respectively coated with the two-component solvent-free liquid epoxy coating to form the inner corrosion-resistant layer and the outer corrosion-resistant layer, and the inner corrosion-resistant layer covers the inner seal welding part.
In the above embodiment, preferably, the elbow is provided with a groove for welding, and the groove is butt-welded to the mouth end of the carbon steel pipe.
In the above embodiment, preferably, the radius of the elbow is greater than or equal to 1.5 times the pipe diameter of the elbow.
In the above embodiment, preferably, the length of the pup joint is greater than 1.5 times the pipe diameter of the base pipe and not less than 200 mm.
In the above embodiment, preferably, the material of the liner tube is corrosion-resistant stainless steel, the wall thickness of the liner tube is greater than or equal to 1.5 mm, and the length of the liner tube is 120 mm.
In the above embodiments, preferably the liner is lined within the base pipe by mechanical compounding.
In the above embodiment, it is preferable that the thickness of the inner and outer corrosion prevention layers is not less than 200 μm.
The anticorrosive return bend in above-mentioned embodiment can directly be with return bend both ends and bimetal composite pipe straight tube or similar composite steel pipe joint butt welding in the field weld construction, has avoided the interior joint coating process of pipeline weld joint, and the return bend is connected to this moment and is accomplished, and the inside lining stainless steel pipe has guaranteed that return bend and pipeline inner anticorrosive coating are continuous, complete.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an anticorrosive return bend of repaired mouth in steel exempts from, its characterized in that includes: a bent pipe and two short sections,
The pipe nipple comprises a base pipe, a stainless steel liner pipe, an inner seal weld and an outer seal weld, wherein the liner pipe is lined in one end of the base pipe, the liner pipe extends out of the pipe end of the base pipe, and the liner pipe is respectively sealed and welded relative to the combination parts of the inner end and the outer end of the base pipe to form the inner seal weld and the outer seal weld;
And two ends of the bent pipe are respectively welded with the carbon steel pipe orifice ends of the two sections of the short sections, which are far away from the liner pipe, and the inner wall and the outer wall of the bent pipe are coated with anticorrosive paint.
2. The steel inner-coating-free anticorrosion elbow pipe as claimed in claim 1, wherein the inner wall and the outer wall of the elbow pipe are respectively coated with a two-component solvent-free liquid epoxy coating to form an inner anticorrosion layer and an outer anticorrosion layer, and the inner anticorrosion layer covers the inner sealing and welding part.
3. The steel anti-corrosion elbow pipe with no inner repaired mouth as claimed in claim 1, wherein the elbow pipe is provided with a groove for welding, and the groove is butt-welded with the end of the carbon steel pipe.
4. The steel interior-coating-free corrosion-resistant elbow pipe according to any one of claims 1 to 3, wherein the radius of the elbow pipe is greater than or equal to 1.5 times the pipe diameter of the elbow pipe.
5. The steel inner-patch-free corrosion-resistant elbow pipe according to claim 1, wherein the length of the short section is 1.5 times greater than the pipe diameter of the base pipe and is not less than 200 mm.
6. The steel anti-corrosion elbow pipe with an inner repaired mouth as claimed in claim 1, wherein the lining pipe is made of anti-corrosion stainless steel, the thickness of the pipe wall of the lining pipe is greater than or equal to 1.5 mm, and the length of the lining pipe is 120 mm.
7. The steel inner-coating-free anticorrosive elbow according to claim 1, wherein the liner pipe is lined in the base pipe in a mechanical composite mode.
8. The steel inner-coating-free anticorrosive elbow according to claim 2, wherein the thicknesses of the inner anticorrosive layer and the outer anticorrosive layer are not less than 200 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920307206.7U CN209800948U (en) | 2019-03-12 | 2019-03-12 | Steel anticorrosion elbow pipe without inner repaired mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920307206.7U CN209800948U (en) | 2019-03-12 | 2019-03-12 | Steel anticorrosion elbow pipe without inner repaired mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209800948U true CN209800948U (en) | 2019-12-17 |
Family
ID=68824463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920307206.7U Active CN209800948U (en) | 2019-03-12 | 2019-03-12 | Steel anticorrosion elbow pipe without inner repaired mouth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209800948U (en) |
-
2019
- 2019-03-12 CN CN201920307206.7U patent/CN209800948U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Steel anti-corrosion elbow without internal joint coating Effective date of registration: 20211102 Granted publication date: 20191217 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI YUYANG PETROLEUM TECHNOLOGY ENGINEERING CO.,LTD. Registration number: Y2021990001054 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231027 Granted publication date: 20191217 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI YUYANG PETROLEUM TECHNOLOGY ENGINEERING CO.,LTD. Registration number: Y2021990001054 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |