CN217784444U - Anticorrosion structure of steel natural gas pipeline - Google Patents
Anticorrosion structure of steel natural gas pipeline Download PDFInfo
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- CN217784444U CN217784444U CN202221290120.6U CN202221290120U CN217784444U CN 217784444 U CN217784444 U CN 217784444U CN 202221290120 U CN202221290120 U CN 202221290120U CN 217784444 U CN217784444 U CN 217784444U
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Abstract
The utility model discloses an anticorrosion structure of a steel natural gas pipeline, which comprises a steel pipeline, a plurality of groups of annular supporting bodies arranged at the periphery of the steel pipeline and a shell fixedly connected with the outer edge of the supporting body, wherein the shell and the steel pipeline form a concentric ring structure, and the supporting bodies of all groups are uniformly distributed at intervals along the length direction of the steel pipeline; the inner wall of the steel pipeline is sequentially provided with an inner anti-corrosion coating and an inner shielding layer, and the outer wall of the steel pipeline is provided with an outer anti-corrosion coating and an outer shielding layer. The utility model discloses a steel pipeline, supporter, shell form a hollow double-deck wall formula structure to set up anticorrosive coating + shielding layer's composite coating at the inside and outside wall of steel pipeline, establish one deck protective barrier outside the pipeline on the one hand, reduce the corruption of external environment to the pipeline outer wall, cut apart into a plurality of independent sealed spaces the space between steel pipeline and shell simultaneously, further prevent the erosion of outside; on the other hand, the adhesive force of the anticorrosive coating is improved, and the anticorrosive coating is prevented from falling off.
Description
Technical Field
The utility model belongs to the technical field of natural gas line, concretely relates to steel natural gas line's anticorrosion structure.
Background
In natural gas engineering, a large number of steel pipelines with large wall thickness and pipe diameter are needed and are used as pipelines for long-distance transportation of natural gas. The corrosion problem of the steel pipeline is an important factor influencing the use effect and the service life of the steel pipeline, and the main reasons for corrosion of the steel gas pipeline comprise: 1. chemical corrosion; 2. electrochemical corrosion; 3. corrosion of the steel pipe by stray current; 4. corrosion caused by bacterial action, and the like. At present, the most common anticorrosion method of a steel natural gas pipeline is to coat an anticorrosion layer on the inner wall and the outer wall of a steel pipe, but because the anticorrosion layer of a pipe body has small adhesive force, low bonding strength and poor impact resistance, the pipe body is washed away to generate residue, and the pipe body and the anticorrosion layer are easy to peel off, thereby causing anticorrosion failure.
SUMMERY OF THE UTILITY MODEL
Not enough and a difficult problem to among the prior art, the utility model aims at providing a steel natural gas line's anticorrosion structure.
The utility model discloses a following technical scheme realizes:
an anti-corrosion structure of a steel natural gas pipeline comprises a steel pipeline, a plurality of groups of annular supporting bodies arranged on the periphery of the steel pipeline, and a shell fixedly connected with the outer edge of each supporting body, wherein the shell and the steel pipeline form a concentric ring structure, and the supporting bodies of all groups are uniformly distributed at intervals along the length direction of the steel pipeline; the inner wall of the steel pipeline is sequentially provided with an inner anti-corrosion coating and an inner shielding layer, and the outer wall of the steel pipeline is provided with an outer anti-corrosion coating and an outer shielding layer.
Furthermore, the inner shielding layer and the outer shielding layer are made of glass fiber reinforced plastics.
Furthermore, the thickness of the inner anticorrosive coating and the thickness of the outer anticorrosive coating are not less than 2.5mm, so that impact resistance and scratch resistance of the inner anticorrosive coating and the outer anticorrosive coating are guaranteed, and damage to the inner wall and the outer wall of the pipeline in daily use is avoided.
Furthermore, the thickness of the inner shielding layer is larger than that of the inner anti-corrosion coating, the thickness of the outer shielding layer is larger than that of the outer anti-corrosion coating, and the inner shielding layer and the outer shielding layer enable the anti-corrosion coating to be tightly attached to the inner wall and the outer wall of the steel pipeline and further not easy to fall off and peel off.
Further, the support body and the steel pipeline are of an integrated structure.
Furthermore, the supporting body and the steel pipeline are tangent to each other, namely, the connecting part of the supporting body and the steel pipeline forms a circular arc chamfer, so that the connecting part is more smooth, the adhesion of an anti-corrosion coating is facilitated, and the possibility of glass falling is reduced.
Compared with the prior art, the utility model discloses beneficial effect includes:
(1) The utility model forms a hollow double-layer partition structure through the steel pipeline, the supporting body and the shell, and sets composite coatings of anticorrosive coating and shielding layer on the inner and outer walls of the steel pipeline, on one hand, a layer of protective barrier is built outside the pipeline, so as to reduce the corrosion of the external environment (rain or soil) to the outer wall of the pipeline, and meanwhile, the space between the steel pipeline and the shell is divided into a plurality of independent sealing spaces, thereby further preventing the corrosion of the outside; on the other hand, the adhesive force of the anticorrosive coating is improved, and the anti-falling off of the anticorrosive coating is avoided.
(2) The utility model discloses inside and outside shielding layer adopts glass fiber reinforced plastic, and it is for using glass fiber or its goods to make reinforcing material's reinforced plastic, has matter light and hard, non-conducting, stable performance, mechanical strength height, advantage such as corrosion-resistant, and the shielding layer that glass fiber reinforced plastic formed is more smooth in addition for inner wall and the bright and clean difficult scale deposit of outer wall.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 isbase:Sub>A cross-sectional view of the steel pipe of FIG. 1 taken along the line A-A.
Illustration of the drawings: 1-steel pipeline, 101-pipe body, 102-inner anti-corrosion coating, 103-inner shielding layer, 104-outer anti-corrosion coating, 105-outer shielding layer, 2-support body and 3-shell.
In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, and integrally connected; can be mechanical connection and electrical connection; may be directly connected, indirectly connected through intervening agents, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood to be specific to those skilled in the art.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, an anticorrosion structure of a steel natural gas pipeline includes a steel pipeline 1, a plurality of groups of annular supporting bodies 2 arranged at the periphery of the steel pipeline 1, and a housing 3 fixedly connected with the outer edge of the supporting bodies 2, wherein the housing 3 and the steel pipeline 1 form a concentric ring structure, and the groups of supporting bodies 2 are uniformly distributed along the length direction of the steel pipeline 1 at intervals.
The shell 3 is used for establishing a layer of protective barrier outside the pipeline, and no matter the natural gas pipeline is overhead or buried, the shell 3 can reduce the erosion of the external environment (rainwater or soil) to the outer wall of the pipeline, so that the corrosion is slowed down.
The function of the support body 2 includes two aspects: firstly, supporting the shell 3, and connecting the steel pipeline 1 with the shell 3; and secondly, the space between the steel pipeline 1 and the shell 3 is divided into a plurality of independent sealing spaces, so that the corrosion of the outside is further prevented.
The inner wall of the steel pipeline 1 is sequentially provided with an inner anti-corrosion coating 102 and an inner shielding layer 103, the outer wall of the steel pipeline 1 is provided with an outer anti-corrosion coating 104 and an outer shielding layer 105, the inner anti-corrosion coating 102 and the outer anti-corrosion coating 104 adopt coatings allowed in the field, and for example, three-layer structures of a primer (for improving the bonding force between the anti-corrosion coating and the pipeline) + an anti-corrosion coating (such as epoxy resin, a polyolefin coating and the like) + a wrapping layer (for keeping certain mechanical strength) are omitted for details. The inner shielding layer 103 and the outer shielding layer 105 are made of glass fiber reinforced plastic (i.e. glass fiber reinforced plastic), which is reinforced plastic using glass fiber or its product as reinforcing material, and has the advantages of light weight, hardness, non-conductivity, stable performance, high mechanical strength, corrosion resistance, etc., and the shielding layer made of glass fiber reinforced plastic is smoother, so that the inner wall and the outer wall are smooth and not easy to scale.
The thickness of the inner anti-corrosion coating 102 and the outer anti-corrosion coating 104 is not less than 2.5mm, so that the impact resistance and scratch resistance of the inner anti-corrosion coating are guaranteed, and the damage to the inner wall and the outer wall of the pipeline in daily use is avoided. The thickness of the inner shielding layer 103 is larger than that of the inner anti-corrosion coating 102, the thickness of the outer shielding layer 105 is larger than that of the outer anti-corrosion coating 104, and the inner shielding layer 103 and the outer shielding layer 105 enable the anti-corrosion coating to be tightly attached to the inner wall and the outer wall of the steel pipeline 1 and further not to fall off easily.
In a specific embodiment, the supporting body 2 and the steel pipe 1 are of an integral structure, and are made of the same material, that is, the supporting body 2 and the steel pipe 1 are integrally formed during pipe processing.
In addition, supporter 2 and steel pipeline 1 meet the face and tangent with steel pipeline 1 outer wall mutually, and the tangent plane of supporter 2 is the splayed structure, and supporter 2 and steel pipeline 1 meet the department and form the chamfer of circular arc promptly for meet the department more slick and sly, be favorable to anticorrosive coating's adhesion, reduce the possibility that glass drops.
The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations, modifications and substitutions can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a steel natural gas line's anticorrosion structure which characterized in that: the steel pipeline supporting device comprises a steel pipeline (1), a plurality of groups of annular supporting bodies (2) arranged on the periphery of the steel pipeline (1) and a shell (3) fixedly connected with the outer edge of the supporting bodies (2), wherein the shell (3) and the steel pipeline (1) form a concentric ring structure, and the supporting bodies (2) of each group are uniformly distributed at intervals along the length direction of the steel pipeline (1); the steel pipeline anti-corrosion coating comprises a steel pipeline (1), wherein the inner wall of the steel pipeline (1) is sequentially provided with an inner anti-corrosion coating (102) and an inner shielding layer (103), and the outer wall of the steel pipeline (1) is provided with an outer anti-corrosion coating (104) and an outer shielding layer (105).
2. The corrosion prevention structure of a steel-made natural gas pipeline according to claim 1, characterized in that: the inner shielding layer (103) and the outer shielding layer (105) are made of glass fiber reinforced plastics.
3. The corrosion prevention structure of a steel-made natural gas pipeline according to claim 1, characterized in that: the thickness of the inner anticorrosion coating (102) and the thickness of the outer anticorrosion coating (104) are both not less than 2.5mm.
4. The corrosion prevention structure of a steel-made natural gas pipeline according to claim 1 or 3, characterized in that: the thickness of the inner shielding layer (103) is larger than that of the inner anti-corrosion coating (102), and the thickness of the outer shielding layer (105) is larger than that of the outer anti-corrosion coating (104).
5. The corrosion prevention structure of a steel-made natural gas pipeline according to claim 1, characterized in that: the support body (2) and the steel pipeline (1) are of an integrated structure.
6. The corrosion prevention structure of a steel-made natural gas pipeline according to claim 1 or 5, wherein: the joint surface of the support body (2) and the steel pipeline (1) is tangent to the outer wall of the steel pipeline (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221290120.6U CN217784444U (en) | 2022-05-27 | 2022-05-27 | Anticorrosion structure of steel natural gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221290120.6U CN217784444U (en) | 2022-05-27 | 2022-05-27 | Anticorrosion structure of steel natural gas pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN217784444U true CN217784444U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221290120.6U Active CN217784444U (en) | 2022-05-27 | 2022-05-27 | Anticorrosion structure of steel natural gas pipeline |
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| CN (1) | CN217784444U (en) |
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2022
- 2022-05-27 CN CN202221290120.6U patent/CN217784444U/en active Active
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