CN216009964U - Corrugated pipe inner insert welding and outer insert welding corrosion-resistant connecting structure applied to expansion joint - Google Patents
Corrugated pipe inner insert welding and outer insert welding corrosion-resistant connecting structure applied to expansion joint Download PDFInfo
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- CN216009964U CN216009964U CN202121917103.6U CN202121917103U CN216009964U CN 216009964 U CN216009964 U CN 216009964U CN 202121917103 U CN202121917103 U CN 202121917103U CN 216009964 U CN216009964 U CN 216009964U
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Abstract
The embodiment of the utility model discloses an outer corrugated pipe plug-in welding corrosion-resistant connecting structure applied to an expansion joint and an inner corrugated pipe plug-in welding corrosion-resistant connecting structure applied to the expansion joint. The corrosion-resistant connection structure of external plug-in welding of bellows includes: the corrugated pipe connecting structure comprises a corrugated pipe connecting structure and an anticorrosion transition ring, wherein the corrugated pipe structure of the expansion joint is a corrugated pipe externally-inserted structure, one side surface of the anticorrosion transition ring is connected with the corrugated pipe, and the other side surface of the anticorrosion transition ring is connected with the corrugated pipe connecting structure; the side face of the corrugated pipe connecting structural part far away from the anticorrosion transition ring is the side for transmitting corrosive media. The utility model can avoid crevice corrosion and electrochemical corrosion, improve the anti-scouring capability, meet the requirement of customers on the service life of products, and has very high construction operability.
Description
Technical Field
The utility model relates to the technical field of corrosion-resistant connecting pieces, in particular to an outer corrugated pipe insert welding corrosion-resistant connecting structure applied to an expansion joint and an inner corrugated pipe insert welding corrosion-resistant connecting structure applied to the expansion joint.
Background
The gas pipeline has complicated and various medium components, the temperature of most pipelines is lower, the condensation phenomenon exists in the pipelines, and the complicated and various media form corrosive media after meeting water. The circumferential connecting welding seam of the connecting structural members such as the corrugated pipe, the connecting pipe and the like can be directly contacted with a medium, the welding seam is usually formed by welding dissimilar steels, the connecting structural members are usually carbon steels, and the corrugated pipe is 254SMo or other corrosion-resistant alloy materials such as Incoloy800 and the like. The connecting weld is the fillet weld, the alloy burning loss phenomenon is very easy to appear in the bellows side material of welding process, simultaneously, the weld metal can be diluted, thereby the corrosion resistance is reduced, this kind of structure can't satisfy the working condition of erosion-resistant and corrosion-resistant, through inside the on-the-spot investigation inefficacy expansion joint, it is that the layer-by-layer corrodes to see the internal corrosion, the bellows surface does not corrode, show that the selection of material does not have the problem, but the hoop connecting weld of bellows and carbon steel structure is the overlap joint fillet weld structure, it is inefficacy to be corroded very easily, the carbon steel structure breaks away from with hoop connecting weld and bellows after corroding, thereby lead to leaking. The service life of a single fillet weld structure generally does not exceed 3 months and is far lower than the service life of 1 year required by a customer.
At present, the prior art has no structure which has high operability, simple structure and low cost investment and can meet the requirements of scouring resistance and corrosion resistance service life under the condition of meeting the requirement of connection strength, and the technical problem of engineering to be solved urgently exists.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model solves the technical problems that: overcomes the defects of the prior art and provides a corrosion-resistant connecting structure applied to an expansion joint.
In order to solve the above technical problem, an embodiment of the present invention provides an external corrugated pipe insert-welding corrosion-resistant connection structure applied to an expansion joint, where the external corrugated pipe insert-welding corrosion-resistant connection structure includes: the corrugated pipe is connected with a structural member and an anti-corrosion transition ring, the corrugated pipe structure of the expansion joint is a corrugated pipe externally-inserted structure, wherein,
one side surface of the anticorrosion transition ring is connected with the corrugated pipe, and the other side surface of the anticorrosion transition ring is connected with the corrugated pipe connecting structural member;
the side face of the corrugated pipe connecting structural part far away from the anticorrosion transition ring is the side for transmitting corrosive media.
Optionally, the corrosion-resistant transition ring is made of an austenitic stainless steel material.
Optionally, the corrosion-resistant transition ring is welded to the corrugated pipe.
Optionally, the corrosion-resistant transition ring is welded to the bellows joint member.
In order to solve the above technical problem, an embodiment of the present invention provides an insert welding corrosion-resistant connection structure applied to an expansion joint in a corrugated pipe, where the insert welding corrosion-resistant connection structure includes: the corrugated pipe connecting structure and the anticorrosive transition ring, the corrugated pipe structure of the expansion joint is a corrugated pipe inserting structure, wherein,
one end of the anticorrosion transition ring is in butt joint with one end of the corrugated pipe, and the side surfaces of the anticorrosion transition ring and the corrugated pipe are parallel to each other;
one side surfaces of the anticorrosive transition ring and the corrugated pipe are connected with the side surface of the corrugated pipe connecting structural part;
and the other side surfaces of the anticorrosive transition ring and the corrugated pipe are side surfaces for transmitting corrosive media.
Optionally, the corrosion-resistant transition ring is made of an austenitic stainless steel material.
Optionally, the corrosion-resistant transition ring is butted with the corrugated pipe in a welding manner.
Optionally, the corrosion-resistant transition ring and the corrugated pipe are welded to the corrugated pipe connecting structural member.
Compared with the prior art, the embodiment of the utility model has the advantages that:
according to the embodiment of the utility model, the corrosion and the corrosion type of the gas pipeline are reasonably analyzed, the connection structure of the common carbon steel and the stainless steel of the original expansion joint is optimally designed, the crevice corrosion and the electrochemical corrosion are avoided, the anti-scouring capability is improved, the service life requirement of a customer on a product is met, and the construction operability is very high. Through the corrosivity and the corruption type of reasonable analysis gas pipeline, carry out optimal design to the connection structure of the general carbon steel of original expansion joint and stainless steel, avoid crevice corrosion and electrochemical corrosion to promoted the scour prevention ability, satisfied the life-span requirement of customer to the product, and construction maneuverability is very high.
Drawings
FIG. 1 is a schematic view of an external bellows plug-weld corrosion-resistant connection structure applied to an expansion joint according to an embodiment of the present invention;
fig. 2 is a schematic view of an insert welded corrosion-resistant connection structure applied to a bellows of an expansion joint according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example one
Referring to fig. 1, a schematic diagram of an external bellows weld corrosion-resistant connection structure applied to an expansion joint according to an embodiment of the present invention is shown, and as shown in fig. 1, the external bellows weld corrosion-resistant connection structure may include: the corrugated pipe is connected with a structural part 1 and an anti-corrosion transition ring 2, the corrugated pipe structure of the expansion joint is a corrugated pipe externally-inserted structure, wherein,
one side surface of the anticorrosion transition ring 1 is connected with the corrugated pipe 3, and the other side surface is connected with the corrugated pipe connecting structural member 1.
The side of the corrugated pipe connecting structural part 1 far away from the anticorrosion transition ring 2 is the side for transmitting corrosive media.
In the embodiment of the utility model, the anticorrosive transition ring is arranged between the corrugated pipe and the corrugated pipe connecting structural part, so that the gap corrosion and the electrochemical corrosion of the corrugated pipe and the corrugated pipe connecting structural part can be avoided.
Next, the above-described structure of the embodiment of the present invention is described in detail below with reference to the following specific implementation.
In a specific implementation manner of the embodiment of the present invention, the anti-corrosion transition ring 2 is made of austenitic stainless steel, and the thickness of the anti-corrosion transition ring is 3 mm. According to the embodiment of the utility model, the influence of electrochemical corrosion and crevice corrosion on the product is eliminated by adding the austenitic stainless steel anti-corrosion transition ring with the thickness of 3mm and performing surfacing treatment on the end part, the service life of the product is prolonged, and the service life of the product is completely beyond the service life limit required by a field.
In another specific implementation manner of the embodiment of the utility model, the anticorrosion transition ring is welded with the corrugated pipe, and the anticorrosion transition ring is welded with the corrugated pipe connecting structural member.
The manufacturing process of the structure can be as follows: 1. firstly, welding an anticorrosive transition ring on a corrugated pipe connecting structural member; 2. and welding the corrugated pipe on the corrosion-resistant transition ring so as to form the corrosion-resistant connecting structure.
In specific implementation, if corrosion resistance is further improved, a polyurea layer can be sprayed at the butt weld, and corrosion resistance and wear resistance of the inserted structure of the corrugated pipe are further improved.
Besides selecting proper welding materials and reasonable welding processes, the welding of the welding seam also needs to strengthen process control and process inspection, no defect is allowed to exist, and the welding seam must be completely welded.
Above-mentioned structural change is under the prerequisite that promotes resistant scouring and corrosion resisting property, and construction maneuverability is also very high, and the cost is also lower.
According to the corrugated pipe outer insert welding corrosion-resistant connecting structure applied to the expansion joint, provided by the embodiment of the utility model, the corrosion and the corrosion type of a gas pipeline are reasonably analyzed, the connecting structure of common carbon steel and stainless steel of the original expansion joint is optimally designed, the crevice corrosion and the electrochemical corrosion are avoided, the anti-scouring capability is improved, the service life requirement of a customer on a product is met, and the construction operability is very high.
Example two
Referring to fig. 2, a schematic diagram of another corrosion-resistant bellows inner-insert-welded connection structure applied to an expansion joint according to an embodiment of the present invention is shown, and as shown in fig. 2, the corrosion-resistant bellows inner-insert-welded connection structure may include: the corrugated pipe is connected with a structural part 1 and an anti-corrosion transition ring 2, the corrugated pipe structure of the expansion joint is a corrugated pipe inserted structure, wherein,
one end of the anticorrosion transition ring 2 is butted with one end of the corrugated pipe 3, and the side surfaces of the anticorrosion transition ring 2 and the corrugated pipe 3 are parallel to each other;
one side surfaces of the anti-corrosion transition ring 2 and the corrugated pipe 3 are connected with the side surface of the corrugated pipe connecting structural member 1;
the other side surfaces of the anti-corrosion transition ring 2 and the corrugated pipe 3 are side surfaces for transmitting corrosive media.
According to the embodiment of the utility model, the anticorrosive transition ring is arranged at the port of the corrugated pipe, so that the gap corrosion and the electrochemical corrosion of the corrugated pipe and the corrugated pipe connecting structural part can be avoided.
Next, the above-described structure of the embodiment of the present invention is described in detail below with reference to the following specific implementation.
In a specific implementation manner of the embodiment of the utility model, the anticorrosion transition ring is made of austenitic stainless steel or a higher-grade anticorrosion material, and the thickness of the anticorrosion transition ring is 3mm, wherein the material of the anticorrosion transition ring is consistent with that of the corrugated pipe. According to the embodiment of the utility model, by adding the 3mm corrosion-resistant transition ring and performing surfacing treatment on the end part, the influence of electrochemical corrosion and crevice corrosion on the product is eliminated, the service life of the product is prolonged, and the service life of the product is completely longer than the service life required by a field.
In another specific implementation manner of the embodiment of the utility model, the anticorrosive transition ring is butted with the corrugated pipe in a welding manner.
In another specific implementation manner of the embodiment of the utility model, the anticorrosive transition ring and the corrugated pipe are connected with the corrugated pipe connecting structural member in a welding manner.
In specific implementation, if corrosion resistance is further improved, a polyurea layer can be sprayed at the butt weld, and corrosion resistance and wear resistance of the inserted structure of the corrugated pipe are further improved.
Besides selecting proper welding materials and reasonable welding processes, the welding of the welding seam also needs to strengthen process control and process inspection, no defect is allowed to exist, and the welding seam must be completely welded.
Above-mentioned structural change is under the prerequisite that promotes resistant scouring and corrosion resisting property, and construction maneuverability is also very high, and the cost is also lower.
According to the corrugated pipe insert welding corrosion-resistant connection structure applied to the expansion joint, provided by the embodiment of the utility model, the corrosion and corrosion type of a gas pipeline are reasonably analyzed, the connection structure of the common carbon steel and the stainless steel of the original expansion joint is optimally designed, the crevice corrosion and the electrochemical corrosion are avoided, the anti-scouring capability is improved, the service life requirement of a customer on a product is met, and the construction operability is very high.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.
Claims (8)
1. The utility model provides a corrosion-resistant connection structure of external plug-in welding of bellows for expansion joint which characterized in that, corrosion-resistant connection structure of external plug-in welding of bellows includes: the corrugated pipe is connected with a structural member and an anti-corrosion transition ring, the corrugated pipe structure of the expansion joint is a corrugated pipe externally-inserted structure, wherein,
one side surface of the anticorrosion transition ring is connected with the corrugated pipe, and the other side surface of the anticorrosion transition ring is connected with the corrugated pipe connecting structural member;
the side face of the corrugated pipe connecting structural part far away from the anticorrosion transition ring is the side for transmitting corrosive media.
2. The corrugated pipe external plug-weld corrosion-resistant connection structure according to claim 1, wherein the corrosion-resistant transition ring is made of austenitic stainless steel.
3. The external bellows weld-on corrosion-resistant connection structure of claim 1, wherein the corrosion-resistant transition ring is welded to the bellows.
4. The external bellows weld corrosion-resistant connection structure of claim 1, wherein the corrosion-resistant transition ring is welded to the bellows joint member.
5. The utility model provides a corrosion-resistant connection structure of bellows inner weld who is applied to expansion joint which characterized in that, corrosion-resistant connection structure of bellows inner weld includes: the corrugated pipe connecting structure and the anticorrosive transition ring, the corrugated pipe structure of the expansion joint is a corrugated pipe inserting structure, wherein,
one end of the anticorrosion transition ring is in butt joint with one end of the corrugated pipe, and the side surfaces of the anticorrosion transition ring and the corrugated pipe are parallel to each other;
one side surfaces of the anticorrosive transition ring and the corrugated pipe are connected with the side surface of the corrugated pipe connecting structural part;
and the other side surfaces of the anticorrosive transition ring and the corrugated pipe are side surfaces for transmitting corrosive media.
6. The insert welding corrosion-resistant connection structure of corrugated pipe according to claim 5, wherein the insert welding corrosion-resistant transition ring of corrugated pipe is made of austenitic stainless steel.
7. An insert welded corrosion resistant connection according to claim 5 wherein said corrosion resistant transition ring is butt-joined to said corrugated tubing by welding.
8. An insert welded corrosion resistant connection according to claim 5 wherein said corrosion resistant transition ring and said corrugated tubing are welded to said corrugated tubing connection structure.
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| CN202121917103.6U CN216009964U (en) | 2021-08-16 | 2021-08-16 | Corrugated pipe inner insert welding and outer insert welding corrosion-resistant connecting structure applied to expansion joint |
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| CN202121917103.6U CN216009964U (en) | 2021-08-16 | 2021-08-16 | Corrugated pipe inner insert welding and outer insert welding corrosion-resistant connecting structure applied to expansion joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113639128A (en) * | 2021-08-16 | 2021-11-12 | 秦皇岛市泰德管业科技有限公司 | Corrosion-resistant connection structure of corrugated pipe insert welding and external insert welding applied to expansion joints |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639128A (en) * | 2021-08-16 | 2021-11-12 | 秦皇岛市泰德管业科技有限公司 | Corrosion-resistant connection structure of corrugated pipe insert welding and external insert welding applied to expansion joints |
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