CN207500646U - A kind of reinforced pipeline - Google Patents

Abstract

The utility model relates to a reinforced pipeline, which comprises a pipeline main body, which includes a carbon fiber composite material layer, an epoxy primer layer and a steel pipeline; the steel pipeline has a plurality of damage depressions for placing repair agents, and the steel pipeline An epoxy primer layer for anti-rust is sheathed on the outer periphery of the pipe, and a carbon fiber composite material layer for improving strength is sheathed on the outer periphery of the epoxy primer layer. The utility model implements the carbon fiber composite material repair technology to repair and remedy the original pipeline without unloading, pressure relief, and fire, which can avoid weld penetration, hydrogen embrittlement, and cold embrittlement caused by welding construction. and other risks, ensuring the continuity of pipeline operation and avoiding economic losses caused by unplanned parking repairs; the high elastic modulus of carbon fiber is conducive to the composite material to bear the pressure of the pipeline, and the reinforcement layer and the pipeline have very good deformation coordination . Carbon fiber has high tensile strength and is extremely safe for pipeline repair.

Description

a reinforced pipe

technical field

The utility model relates to the field of building pipes, in particular to a reinforced pipeline for transporting oil and gas.

Background technique

With the development of my country's urbanization and the gradual improvement of public transportation facilities, it is inevitable to face the problem of intersections between municipal roads, bridges and existing oil and gas pipelines. In addition, the original oil and gas pipelines were designed according to the terrain environment at that time, so the design strength of the original pipeline did not meet the planned terrain. For example, the original pipeline design was designed according to the secondary area, but with the The development of the pipeline section has now become a fourth-level area, resulting in the fact that various parameters of the original pipeline cannot meet the existing environment.

At present, in response to the above situation, the original pipeline can only be basically abolished, and the pipeline that meets the requirements can be replaced and laid again. This approach has caused serious waste, cumbersome construction techniques, high cost, and fire must be used during the construction process, which affects the continuity of pipeline operation and causes economic losses caused by unplanned parking.

Utility model content

The utility model provides a reinforced pipeline for transporting oil and gas, which solves the above-mentioned technical problems.

The solution of the utility model to solve the above-mentioned technical problems is as follows: a reinforced pipeline, the reinforced pipeline includes a pipeline main body, and the pipeline main body includes a carbon fiber composite material layer, an epoxy primer layer and a steel pipeline; The outer circumference of the pipeline has a plurality of damage depressions for placing the repair agent, and the outer circumference of the steel pipeline filled with the repair agent is covered with an epoxy primer layer for antirust, and the epoxy primer is The outer periphery of the paint layer is sheathed with a carbon fiber composite material layer for increasing strength.

The beneficial effects of the utility model are: the utility model provides a reinforced pipeline, which has the following advantages: 1. The carbon fiber composite material repair technology is implemented for the original pipeline without unloading, pressure relief and fire. Carrying out repair and remediation can avoid the risks of weld penetration, hydrogen embrittlement, and cold embrittlement caused by welding construction, ensure the continuity of pipeline operation, and avoid economic losses caused by unplanned parking repairs; 2. Carbon fiber elastic modulus High, close to the elastic modulus of steel, it is beneficial for the composite material to bear the pressure of the pipeline as much as possible, and the reinforcement layer and the pipeline have very good deformation coordination. The tensile strength of carbon fiber is high, and it is extremely safe for pipeline repair; 3. Use repairing agent to repair the damaged depression of the original pipeline, and further improve the overall strength of the reinforced pipeline.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the reinforced pipeline further includes an anti-corrosion layer, and the anti-corrosion layer is sheathed on the outer periphery of the carbon fiber composite material layer.

The beneficial effect of adopting the above further scheme is that: by sheathing the anti-corrosion layer on the outer periphery of the carbon fiber composite material layer, the anti-corrosion capability of the surface layer of the carbon fiber composite material layer is improved.

Further, the material of the repairing agent is steel repairing agent.

The beneficial effect of adopting the above-mentioned further scheme is: by designing the material of the repairing agent as a steel repairing agent, the steel repairing agent is a two-component, cement-like, room-temperature-curing polymer resin glue; it is suitable for repairing defects of various steel parts , good overall performance, high bonding strength with the body, and the color can be kept consistent with the substrate to be repaired; after curing, it has high hardness and no shrinkage, and can be used for various mechanical processing. It has excellent properties such as wear resistance, aging resistance, oil resistance, water resistance, and various chemical corrosion resistance, and can withstand high temperatures of 200 °C.

Further, the material of the epoxy primer layer is a solvent-free epoxy primer.

The beneficial effects of adopting the above-mentioned further scheme are: the solvent-free epoxy primer removes the excellent insulation and excellent chemical stability of the solvent-based epoxy coating, and has great advantages in terms of adhesion, toughness, impact strength, and peeling resistance. Big improvement. There is no solvent volatilization during construction, and the degree of film formation at one time can reach more than 200 μm, without the disadvantage of pinholes. Save energy and protect the environment. Solvent-free epoxy coatings have many advantages such as high strength, high solid content, good corrosion resistance, simple construction procedures, and no environmental pollution.

Further, the material of the anti-corrosion layer is a ceramic filling coating.

The beneficial effect of adopting the above further solution is: the material of the anti-corrosion layer is designed as a ceramic filling coating, which is applied to the ceramic filling coating system for brushing, and is designed to be applied to steel, concrete and the like. In chemical and related industries, it can be used to protect surfaces from strong chemicals. It is designed as a non-structural duct coating that is more durable than traditional tape coatings, paints and waxes.

The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with accompanying drawings. back. The specific embodiment of the utility model is given in detail by the following examples and accompanying drawings.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Figure 1 is a schematic diagram of a reinforced pipeline provided by an embodiment of the present invention;

Fig. 2 is an A-A sectional view of a reinforced pipeline provided in Fig. 1 .

In the accompanying drawings, the list of parts represented by each label is as follows:

100. Reinforced pipeline; 10. Anti-corrosion layer; 20. Pipe body; 21. Carbon fiber composite material layer; 22. Epoxy primer layer; 23. Repair agent; 24. Steel pipeline; 241. Damaged depression.

Detailed ways

The principles and features of the present utility model are described below in conjunction with accompanying drawings 1-2, and the examples given are only used to explain the present utility model, and are not intended to limit the scope of the present utility model. In the following paragraphs, the present utility model is described more specifically by way of example with reference to the accompanying drawings. According to the following description and claims, the advantages and features of the utility model will be more clear. It should be noted that all the drawings are in very simplified form and use inaccurate scales, which are only used to facilitate and clearly illustrate the purpose of the embodiment of the present utility model.

It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time. When a component is said to be "set on" another component, it may be set directly on the other component or there may be an intervening component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in Figure 1-2, the utility model provides a reinforced pipeline 100, the reinforced pipeline 100 includes a pipeline main body 20, the pipeline main body 20 includes a carbon fiber composite material layer 21, an epoxy primer layer 22 and Steel pipe 24; said steel pipe 24 has a plurality of damage depressions 241 for placing repair agent 23, and the outer periphery of said steel pipe 24 is provided with an epoxy primer layer 22 for antirust, The outer periphery of the epoxy primer layer 22 is sheathed with a carbon fiber composite material layer 21 for improving strength.

The above embodiment provides a reinforced pipeline, which has the following advantages: 1. The carbon fiber composite material repair technology is implemented to repair and remedy the original pipeline without unloading, pressure relief, or fire, which can avoid the Risks such as weld penetration, hydrogen embrittlement, and cold embrittlement brought about by welding construction ensure the continuity of pipeline operation and avoid economic losses caused by unplanned parking repairs; 2. The elastic modulus of carbon fiber is high, which is similar to that of steel The amount is relatively close, which is beneficial for the composite material to bear the pressure of the pipeline as much as possible, and the reinforcement layer and the pipeline have very good deformation coordination. The tensile strength of carbon fiber is high, and it is extremely safe to be used for pipeline repair; 3. The repair agent 23 is used to repair the damaged depression 241 of the original pipeline, so as to further improve the overall strength of the reinforced pipeline.

Preferably, as shown in FIG. 2 , the reinforced pipeline 100 further includes an anti-corrosion layer 10 , and the anti-corrosion layer 10 is sheathed on the outer periphery of the carbon fiber composite material layer 21 . By sheathing the anticorrosion layer 10 on the outer periphery of the carbon fiber composite material layer 21 , the anticorrosion capability of the surface layer of the carbon fiber composite material layer 21 is improved.

Preferably, the repairing agent 23 is made of steel repairing agent. By designing the material of the repair agent 23 as a steel repair agent, the steel repair agent is a two-component, cement-like, room temperature curing polymer resin glue; it is suitable for repairing defects of various steel parts, with good comprehensive performance and combined with the body High strength, the color can be kept consistent with the substrate to be repaired; after curing, the hardness is high, no shrinkage, and can be used for various mechanical processing. It has excellent properties such as wear resistance, aging resistance, oil resistance, water resistance, and various chemical corrosion resistance, and can withstand high temperatures of 200 °C.

Preferably, the material of the epoxy primer layer 22 is a solvent-free epoxy primer.

Solvent-free epoxy primer In addition to the excellent insulation and excellent chemical stability of solvent-free epoxy coatings, it has greatly improved in terms of adhesion, toughness, impact strength, and peeling resistance. There is no solvent volatilization during construction, and the degree of film formation at one time can reach more than 200 μm, without the disadvantage of pinholes. Save energy and protect the environment. Solvent-free epoxy coatings have many advantages such as high strength, high solid content, good corrosion resistance, simple construction procedures, and no environmental pollution.

It can be understood that, the material of the epoxy primer layer 22 may also be a solvent-based epoxy primer. Scale fillers Adding flaky fillers can not only improve the mechanical properties of the coating, but also play a good role in shielding the coating and has a good anti-corrosion effect. The supporting curing agent for epoxy coatings has low viscosity, and the cured coating has good anti-corrosion performance, hardness, toughness and compactness. And there is a relatively suitable period of use and curing time.

Preferably, the material of the anti-corrosion layer 10 is a ceramic filled coating.

By designing the material of the anticorrosion layer 10 as a ceramic filling coating, the ceramic filling coating system applied to brushing is designed to be applied to steel, concrete and the like. In chemical and related industries, it can be used to protect surfaces from strong chemicals. It is designed as a non-structural duct coating that is more durable than traditional tape coatings, paints and waxes.

It can be understood that the anti-corrosion coating 10 is a function of copolymerization of various high-performance anti-corrosion materials and modified toughened heat-resistant resins to form an interpenetrating network structure, produce a synergistic effect, and effectively improve the anti-corrosion performance of the polymer. Coating; the anti-corrosion layer 10 can also be epoxy resin anti-corrosion coating, phenolic epoxy coating layer, scale anti-corrosion coating, epoxy-polyester hybrid type and outdoor pure polyester, etc. Depending on the temperature used, the anti-corrosion layer 10 can also be a low-temperature anti-corrosion coating, a normal-temperature anti-corrosion coating or a high-temperature anti-corrosion coating.

Concrete working principle and using method of the present utility model are:

The first step: repair section pipeline excavation. In the process of excavation, manual section excavation shall be adopted, and the pipeline shall not be damaged. After the pipeline is exposed, the pipeline needs to be inspected to see if there are any leaks.

Step 2: Remove the original anti-corrosion layer of the pipeline. At present, domestic pipeline anti-corrosion layer removal methods include flame-throwing gun barbecue stripping, infrared heating stripping, air shovel stripping, anti-corrosion layer stripping machine stripping, etc. At present, the anti-corrosion layer stripping machine is used for stripping.

The third step: pipe surface treatment. Sand blast or manually polish and derust the pipelines that have been removed from the anti-corrosion layer, so that the surface of the pipelines can reach the St3 standard.

The fourth step: carbon fiber reinforcement. Firstly, the repair agent is used to fill and repair the entire pipeline, and after curing, the epoxy resin matrix material is painted, and the carbon fiber composite material is wound for curing and maintenance.

The basic idea of carbon fiber composite reinforcement technology is to use the high strength characteristics of carbon fiber materials in the fiber direction, rely on thermosetting resin matrix reinforcement, and use a wet laying process to coat a composite material repair layer on the outside of the service pipeline, forming an integration with the pipeline, sharing the pipeline The internal pressure can reduce the stress level of the pipeline itself, so as to achieve the purpose of improving the strength of the original pipeline.

The tensile strength ^of high-strength carbon fiber composite materials exceeds 3500MPa, ^which is about 10 times higher than that of steel. Commonly used carbon fiber polymer sheets weigh only a few hundred grams per square meter. The carbon fiber composite material reinforcement system is mainly divided into three main parts: special repair agent, epoxy primer, and high-strength resin-based carbon fiber composite material. The main function of the special repair agent is to fill the defect and transmit the pressure; the epoxy primer is mainly used to prevent the occurrence of galvanic corrosion; the carbon fiber composite material is mainly used to share the internal pressure borne by the pipe wall. The specific construction process is to wrap carbon fiber cloth on the pipe by wet winding method or preforming method. According to the known strength of the pipe to be achieved, the minimum thickness of the carbon fiber reinforcement layer is calculated by the calculation formula, and finally the carbon fiber reinforcement layer is determined. In reference to the ASME-PCC-2-2015 standard, the calculation formula for the minimum thickness of the carbon fiber reinforced layer is as follows:

nδ _c ＝δ _min ＝E _S /E×D/2π×(PP _s )

P _s =2δ _S Fδ/D

In the formula: δ _min ——minimum repair layer thickness, mm;

E _s ——Tube tensile strength, MPa;

E _c —— carbon fiber composite material tensile strength, MPa;

D——pipe outer diameter, mm;

σ _s ——pipe yield strength, MPa;

P—pipeline design pressure, MPa;

P _s ——the maximum operating pressure of the pipeline under the existing wall thickness and design coefficient, MPa;

F - design factor;

δ - the existing wall thickness of the pipe, mm;

δ _c —thickness of repair material layer, mm;

It is understandable that when the original pipeline has damage and dents, first fill the damaged dents and then do the carbon fiber cloth winding process to ensure that there are no hollows, air bubbles, etc. between the composite material layers and between the material and the outer surface of the pipeline. .

The utility model provides a reinforced pipeline. (1) The carbon fiber composite material repair technology is implemented without unloading, pressure relief, and fire, which can avoid weld penetration and hydrogen leakage caused by welding construction. Risks such as brittleness and cold brittleness can be avoided, the continuity of pipeline operation can be guaranteed, and the economic loss caused by unplanned shutdown and repair can be avoided.

(2) The elastic modulus of carbon fiber is high, which is relatively close to that of steel, which is conducive to the composite material to bear the pressure of the pipeline as much as possible, and the reinforcement layer and the pipeline have very good deformation coordination. Carbon fiber has high tensile strength and is extremely safe for pipeline repair. Research by the Gas Research Institute in the United States has shown that the repair effect of fiber composite materials on pressure pipelines depends on the tensile strength and elastic modulus of the composite materials.

(3) Carbon fiber composite materials and repair agents have high interlaminar shear strength, corrosion resistance, temperature resistance, and excellent aging resistance.

(4) The creep resistance of carbon fiber composites is excellent, and its strength remains basically unchanged with the increase of service time.

(5) Applicable to various pipeline systems and pipeline shapes, such as long-distance pipelines, public pipelines, etc.; irregular pipe fittings such as elbows, tees, and large and small heads.

(6) The construction is simple and fast, and the operation process is simple.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in any way; any ordinary skilled person in the industry can smoothly implement it as shown in the accompanying drawings and the above description This utility model; however, all those who are familiar with the profession without departing from the scope of the technical solution of the utility model, and make use of the technical content disclosed above to make some changes, modifications and equivalent changes of evolution are all equivalent changes of the utility model. New equivalent embodiments; at the same time, all changes, modifications and evolutions of any equivalent changes made to the above embodiments according to the essential technology of the utility model still belong to the protection scope of the technical solution of the utility model.

Claims (5)

1. A reinforced pipeline, characterized in that, the reinforced pipeline (100) comprises a pipeline main body (20), and the pipeline main body (20) comprises a carbon fiber composite material layer (21), an epoxy primer layer (22 ) and steel piping (24); There are a plurality of damage depressions (241) on the outer circumference of the steel pipeline (24), and the damage depressions (241) are filled with repairing agent (23), and the steel pipeline after filling the repairing agent (23) The outer circumference of the pipe (24) is provided with the epoxy primer layer (22) for antirust, and the outer circumference of the epoxy primer layer (22) is provided with the carbon fiber composite material layer for improving strength (twenty one). 2. A kind of reinforced pipeline according to claim 1, characterized in that, the reinforced pipeline (100) also includes an anti-corrosion layer (10), and the anti-corrosion layer (10) is arranged on the carbon fiber composite material layer ( 21) on the periphery. 3. A reinforced pipeline according to claim 1, characterized in that, the repair agent (23) is made of steel repair agent. 4. A reinforced pipeline according to claim 1, characterized in that, the material of the epoxy primer layer (22) is a solvent-free epoxy primer. 5. A reinforced pipeline according to claim 2, characterized in that the material of the anti-corrosion layer (10) is a ceramic filling coating.