CN214425438U - Anticorrosive structure of joint coating stainless steel in TPEP steel pipe butt welding back - Google Patents
Anticorrosive structure of joint coating stainless steel in TPEP steel pipe butt welding back Download PDFInfo
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- CN214425438U CN214425438U CN202120532136.2U CN202120532136U CN214425438U CN 214425438 U CN214425438 U CN 214425438U CN 202120532136 U CN202120532136 U CN 202120532136U CN 214425438 U CN214425438 U CN 214425438U
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Abstract
The utility model relates to a joint coating stainless steel anticorrosion structure in TPEP steel pipe butt joint welding back, including first steel pipe, second steel pipe, corrosion resistant plate, epoxy powder anticorrosive coating, the mouth of pipe butt joint of first steel pipe and second steel pipe sets up corrosion resistant plate in the inside wall position of butt joint department, and corrosion resistant plate is the loop configuration, and the inside wall setting of butt joint department is hugged closely to corrosion resistant plate, and corrosion resistant plate covers the butt joint, and the inside wall of first steel pipe and second steel pipe sets up the epoxy powder anticorrosive coating, and the epoxy powder anticorrosive coating covers corrosion resistant plate. The problem of the mouth of pipe inner wall in the butt joint welding process of small pipe diameter TPEP steel pipe can't realize anticorrosive is solved.
Description
Technical Field
The utility model belongs to the technical field of the pipeline engineering welding, concretely relates to joint coating stainless steel anticorrosion structure in TPEP steel pipe butt joint welding back.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The TPEP steel pipe inner wall adopts a thermal spraying epoxy powder corrosion prevention mode, the powder is uniformly coated on the surface of the pipe body after being heated and sintered at high temperature to form a steel-plastic composite layer, the coating adhesive force and the coating thickness are greatly improved, and the capabilities of collision resistance and corrosion resistance are enhanced. The TPEP anticorrosion steel pipe is a pipeline with anticorrosion on the inner wall and the outer wall of the steel pipe, is applied to the field of drinking water conveying, has very important anticorrosion on the inner wall of the steel pipe, and can greatly reduce the pollution to drinking water caused by poor anticorrosion layer.
TPEP steel pipe that pipe diameter more than or equal to 1000mm can bore into the steel pipe after the installation butt welding and carry out artifical anticorrosive of roughly to mouth of pipe inner wall splice, but anticorrosive effect is very poor, will rust in the short time and pollute quality of water, and life is also very short. TPEP steel pipe that pipe diameter less than or equal to 1000mm, can't bore in the steel pipe and carry out artifical anticorrosive roughly to mouth of pipe inner wall splice in the installation butt welding back, steel pipe mouth of pipe inner wall section just can not be anticorrosive, will rust in the short time very, pollutes the drinking water quality of carrying promptly, has reduced life because of rusty corrosion steel pipe again.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above-mentioned prior art, the utility model aims at providing a joint coating stainless steel anticorrosion structure in TPEP steel pipe butt welding back.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides a joint coating stainless steel anticorrosion structure in TPEP steel pipe butt joint welding back, includes first steel pipe, second steel pipe, corrosion resistant plate, epoxy powder anticorrosive coating, the mouth of pipe butt joint of first steel pipe and second steel pipe sets up corrosion resistant plate in the inside wall position of butt joint department, and corrosion resistant plate is the loop configuration, and corrosion resistant plate hugs closely the inside wall setting of butt joint department, and corrosion resistant plate covers the butt joint, and the inside wall of first steel pipe and second steel pipe sets up the epoxy powder anticorrosive coating, and the epoxy powder anticorrosive coating covers corrosion resistant plate.
The position of first steel pipe and second steel pipe interface forms the in-process of butt joint, sets up corrosion resistant plate at the inner wall, has just formed a inclosed overall structure's anticorrosive coating at the steel pipe inner wall, and the drinking water is used to the medium of carrying in the steel pipe just keeps apart with steel pipe carbon steel sheet inlayer completely, has reached anticorrosive effect. The problem of corrosion prevention in the butt welding process of the steel pipes is solved.
The utility model discloses one or more technical scheme has following beneficial effect:
the inner joint coating stainless steel anti-corrosion structure solves the problem that the inner wall of the pipe orifice of the small-caliber TPEP steel pipe cannot realize corrosion resistance after the TPEP steel pipe is in butt welding; the condition that the inner wall of the opening of the steel pipe is rusted to pollute the conveyed drinking water is solved; the welding installation is simple, and anticorrosive effect is good.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the invention and not to limit the invention unduly.
FIG. 1 is a diagram of an anti-corrosion structure of inner repaired mouth stainless steel after TPEP steel pipes are butt-welded;
the steel pipe comprises a steel pipe body, a first steel pipe body, a second steel pipe body, a stainless steel plate body, 4 epoxy powder anticorrosive layers, 5 PE anticorrosive layers, 6 stainless steel welding points and 7 steel pipe welding points.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The utility model provides a joint coating stainless steel anticorrosion structure in TPEP steel pipe butt joint welding back, includes first steel pipe, second steel pipe, corrosion resistant plate, epoxy powder anticorrosive coating, the mouth of pipe butt joint of first steel pipe and second steel pipe sets up corrosion resistant plate in the inside wall position of butt joint department, and corrosion resistant plate is the loop configuration, and corrosion resistant plate hugs closely the inside wall setting of butt joint department, and corrosion resistant plate covers the butt joint, and the inside wall of first steel pipe and second steel pipe sets up the epoxy powder anticorrosive coating, and the epoxy powder anticorrosive coating covers corrosion resistant plate.
As a further technical scheme, the thickness of the stainless steel plate is 2-3 mm.
As a further technical scheme, the width of the stainless steel plate is 120-160 mm.
As a further technical scheme, the first steel pipe and the second steel pipe are in butt joint, and the stainless steel plate at the interface of the first steel pipe and the second steel pipe is provided with a welding seam.
As a further technical scheme, the outer side walls of the first steel pipe and the second steel pipe are provided with a 3PE (polyethylene) anticorrosive coating, and the 3PE anticorrosive coating is sequentially provided with an epoxy resin layer, an adhesive layer and a polyethylene layer from inside to outside.
As a further technical scheme, the material of the stainless steel plate is stainless steel 304 or stainless steel 316.
As a further technical scheme, the first steel pipe and the second steel pipe are made of carbon steel.
As a further technical scheme, the diameter of the first steel pipe and the second steel pipe is 219mm-1420 mm.
As described in the background art, in the welding process of the TPEP steel pipe, the inner side wall of the welding port is not coated with the epoxy powder anticorrosive coating, and the TPEP steel pipe is directly exposed to be directly contacted with the fluid inside the steel pipe at the welding seam and nearby positions, so that the TPEP steel pipe is easy to corrode.
The method in the prior art is that the steel pipe can be drilled into a steel pipe after installation and butt welding to carry out artificial rough corrosion prevention on the welding position of the inner wall of the pipe opening, but the corrosion prevention effect is very poor, the steel pipe can rust in a short time to pollute water, and the service life is short. Furthermore, the length of the two butted steel pipes cannot be too long, otherwise it is difficult to drill into the steel pipes for corrosion prevention. Therefore, the existing anticorrosion method has poor effect and is difficult to operate.
The invention provides an inner repaired mouth stainless steel anti-corrosion structure after TPEP steel pipe butt welding, which comprises a first steel pipe 1, a second steel pipe 2, a stainless steel plate 3 and an epoxy powder anticorrosive layer 4, wherein pipe orifices of the first steel pipe 1 and the second steel pipe 2 are in butt joint, the stainless steel plate 3 is arranged at the inner side wall position of the butt joint, the stainless steel plate 3 is of an annular structure, the stainless steel plate 3 is arranged close to the inner side wall of the butt joint, and the stainless steel plate 3 covers the butt joint seam.
The first steel pipe 1 and the second steel pipe 2 are two steel pipes to be welded and connected with each other, the annular stainless steel plate 3 is tightly attached to the inner side wall of the butt joint, and particularly, an argon arc welding mode can be adopted to enable the annular stainless steel plate to be connected with the first steel pipe and the second steel pipe. The stainless steel plate 3 separates the steel pipe at the interface from the inside of the steel pipe, and isolates the weld (butt joint), further improving the sealing effect. So as to prevent the steel pipe at the interface from being corroded. The stainless steel plate has excellent corrosion resistance, so that the corrosion resistance at the interface is improved.
The inside wall of first steel pipe 1 and second steel pipe 2 sets up epoxy powder anticorrosive coating 4, and epoxy powder anticorrosive coating 4 covers stainless steel 3. Since the stainless steel plate 3 is previously provided in contact with the first steel pipe 1 and the second steel pipe 2. The process of operation may be such that: the stainless steel plate 3 is divided into two sections, the two sections of stainless steel plates are respectively connected with the first steel pipe and the second steel pipe, and then the two sections of stainless steel plates 3 and the two steel pipes are connected, so that in the process of connecting the two sections of stainless steel plates and the steel pipes, the inner side walls of the stainless steel plates can be conveniently coated with epoxy powder anticorrosive coatings in advance, the epoxy powder anticorrosive coatings between the inner side walls of the first steel pipe and the second steel pipe and the stainless steel plates are very smooth and even, and after the first steel pipe 1 and the second steel pipe 2 are in butt joint, the whole butt joint and the positions near the butt joint are coated with the epoxy powder anticorrosive coatings. Therefore, it is not necessary to drill in and coat the epoxy powder anticorrosive layer after the first steel pipe 1 and the second steel pipe 2 are butted. Therefore, the method is convenient, saves labor, and forms an epoxy powder anticorrosive coating with better uniformity and better sealing effect.
The inner wall of the steel pipe forms a closed and integral anticorrosive coating, so that the steel pipe is completely isolated from the conveyed medium drinking water, and the steel pipe has a better anticorrosive effect.
The thickness of the stainless steel plate 3 is 2-3 mm. The stainless steel plate 3 is thin, so that a sealing effect can be achieved, and meanwhile, no large bulge is formed between the stainless steel plate and the inner wall of the steel pipe, so that the influence on the flow of water flow is avoided. The stainless steel plate and the two steel pipes form a whole, so that the corrosion prevention effect is good, and the service life is long.
The width of the stainless steel plate 3 is 120-160 mm. The width of the stainless steel plate 3 spans the butt seam and exceeds the butt seam for a certain distance, so that a good sealing effect is achieved.
The first steel pipe 1 and the second steel pipe 2 are connected in a butt joint mode, and a stainless steel plate at the joint of the first steel pipe 1 and the second steel pipe 2 is provided with a welding seam. The connection process comprises the following steps: the stainless steel plate 3 is divided into two sections, the first section stainless steel plate is welded and connected with the first steel pipe through argon arc welding, the second section stainless steel plate is welded and connected with the second steel pipe through argon arc welding, after welding, the two stainless steel plates exceed one section (about 1.5 mm) of the steel pipe, a stainless steel welding point 6 between the first section stainless steel plate and the second section stainless steel plate is welded after butt joint is facilitated, then a steel pipe welding point 7 between the first steel pipe and the second steel pipe is welded, and sealing connection between the whole steel pipes is achieved.
The lateral wall of first steel pipe 1 and second steel pipe 2 sets up 3PE anticorrosive coating 5, and 3PE anticorrosive coating 5 from interior to exterior sets gradually epoxy layer, gluing agent layer, polyethylene layer. After the first steel pipe and the second steel pipe are welded, a PE anticorrosive coating is coated on the outer wall of the steel pipe, and corrosion prevention of the outer repaired mouth is achieved. Thus forming an integral corrosion-resistant sealing structure.
The stainless steel plate is made of stainless steel 304 or stainless steel 316. Stainless steel this application has better anticorrosive effect, can play the sealed effect of fine anticorrosive between two steel pipes.
The first steel pipe and the second steel pipe are made of carbon steel. After the two carbon steel pipes are respectively connected with the stainless steel plate, the two carbon steel pipes are firmly welded by using the carbon steel welding rods.
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 a joint coating stainless steel anticorrosion structure in TPEP steel pipe butt welding back which characterized in that: including first steel pipe, second steel pipe, corrosion resistant plate, epoxy powder anticorrosive coating, the mouth of pipe butt joint of first steel pipe and second steel pipe sets up corrosion resistant plate in the inside wall position of butt joint department, and corrosion resistant plate is the loop configuration, and the inside wall setting of butt joint department is hugged closely to corrosion resistant plate, and corrosion resistant plate covers the butt joint, and the inside wall of first steel pipe and second steel pipe sets up the epoxy powder anticorrosive coating, and the epoxy powder anticorrosive coating covers corrosion resistant plate.
2. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the thickness of the stainless steel plate is 2-3 mm.
3. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the width of the stainless steel plate is 120-160 mm.
4. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the first steel pipe and the second steel pipe are connected in a butt joint mode, and the stainless steel plate at the joint of the first steel pipe and the second steel pipe is provided with a welding seam.
5. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the lateral wall of first steel pipe and second steel pipe sets up the 3PE anticorrosive coating, and 3PE anticorrosive coating from interior to exterior sets gradually epoxy layer, gluing agent layer, polyethylene layer.
6. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the stainless steel plate is made of stainless steel 304 or stainless steel 316.
7. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the first steel pipe and the second steel pipe are made of carbon steel.
8. The inner repaired mouth stainless steel anti-corrosion structure of claim 1 after TPEP steel pipe butt welding, characterized in that: the diameter of the first steel pipe and the second steel pipe is 219mm-1420 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532136.2U CN214425438U (en) | 2021-03-13 | 2021-03-13 | Anticorrosive structure of joint coating stainless steel in TPEP steel pipe butt welding back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532136.2U CN214425438U (en) | 2021-03-13 | 2021-03-13 | Anticorrosive structure of joint coating stainless steel in TPEP steel pipe butt welding back |
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| Publication Number | Publication Date |
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| CN214425438U true CN214425438U (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120532136.2U Active CN214425438U (en) | 2021-03-13 | 2021-03-13 | Anticorrosive structure of joint coating stainless steel in TPEP steel pipe butt welding back |
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| CN (1) | CN214425438U (en) |
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2021
- 2021-03-13 CN CN202120532136.2U patent/CN214425438U/en active Active
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Effective date of registration: 20230620 Address after: West Dagushan Village, Guyun Lake Subdistricts of China, Changqing District, Jinan City, Shandong Province 250000 Patentee after: Jinan Derun New Material Technology Co.,Ltd. Address before: 250031 3-108, building 7, youth Juyi apartment, No. 679, Beiyuan street, Tianqiao District, Jinan City, Shandong Province Patentee before: Shandong Zhongrun anticorrosion and thermal insulation Co.,Ltd. |
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