阅读说明：本技术 一种管道带压堵漏修复及复层长效防腐装置及其施工方法 (Pipeline pressure leaking stoppage repairing and double-layer long-acting anti-corrosion device and construction method thereof ) 是由 魏民 其他发明人请求不公开姓名 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种管道带压堵漏修复及复层长效防腐装置及其施工方法,属于表面工程技术领域,其采用“堵漏及加固层+防腐蚀膏+阻燃防腐蚀带+油性阻隔层+防腐蚀保护罩+耐粘污耐候面涂”的六层防护体系,由于其极佳的追随性,可与基材结合紧密,防腐蚀膏和阻燃防腐蚀带形成的保护膜可络合基材表面氧化物防止二次腐蚀的发生,同时隔绝腐蚀性介质对基材的侵蚀,外部油性材料阻隔层与非金属保护罩对防腐蚀成分形成密封保护,确保防腐成分不流失,阻燃型非金属保护罩的耐沾污面涂层,耐污性能突出且耐候性能优异,对保护罩提供长久的外保护功能。(The invention discloses a pipeline belt-pressing leakage-blocking repairing and multi-layer long-acting anticorrosion device and a construction method thereof, belonging to the technical field of surface engineering.)

1. The utility model provides a pipeline area is pressed leaking stoppage and is restoreed and long-term anticorrosive device of multiple layers, its characterized in that, pipeline area is pressed leaking stoppage and is restoreed and long-term anticorrosive device of multiple layers includes leaking stoppage piece, back up coat, anti-corrosion cream layer, fire-retardant anti-corrosion band layer, oily barrier layer, anti-corrosion safety cover and the resistant coating of resistant dirty resistant waiting to scribble that distributes from inside to outside in proper order, wherein, leaking stoppage piece goes deep into inside the pipeline through the corruption perforation damaged point on the pipeline, leaking stoppage piece includes intraductal portion, pipe wall part and outside of tubes part, outside of tubes part is greater than intraductal portion, intraductal portion laminating under the inside atmospheric pressure effect of pipeline is fixed on the pipeline inner wall, outside of tubes part laminating under the effect of back up coat is fixed on the pipeline outer wall, leaking stoppage piece embedding the inside of.

2. The device for the pressurized leaking stoppage repair and the long-acting anticorrosion of the multilayer of the pipeline according to claim 1, wherein the leaking stoppage block is made by curing a leaking stoppage agent, the leaking stoppage agent comprises a leaking stoppage agent A component and a leaking stoppage agent B component, and the leaking stoppage agent A component comprises the following raw materials in percentage by mass: 40-60% of polythiol, 8-10% of epoxy resin, 2-5% of amine-terminated polyether, 0.3-1% of phenol, 5-8% of fumed silica, 18-22% of superfine silicon iron powder, 1.5-3.5% of diatomite and 1-3% of tannin secondary doped polyaniline; the component B of the plugging agent comprises the following raw materials in percentage by mass: 35-45% of epoxy resin, 0.3-1.0% of gamma-glycidyl ether oxypropyl trimethoxy silane, 7-11% of fumed silica, 8-12% of amine terminated polyether, 3-5% of isophorone diisocyanate, 20-25% of iron powder, 4-8% of potassium titanate whisker and 3-10% of metal corrosion inhibition additive.

3. The device for the pressurized leaking stoppage repair and the long-acting anticorrosion of the multilayer of the pipeline according to claim 2, wherein the leaking stoppage agent adopts a component A of the leaking stoppage agent and a component B of the leaking stoppage agent in a volume ratio of 1:1 to be uniformly mixed for use, and the anticorrosion paste layer comprises the following raw materials in percentage by mass: 15-40% of base oil, 8-20% of polyether polyamine, 0.8-1.5% of antioxidant, 5-8% of sterilizing agent, 6-10% of dispersing penetrating agent, 3-8% of hydrogenated castor oil derivative, 3-8% of fumed silica, 1-4% of pigment, 6-12% of metal corrosion inhibition additive and 10-24% of shell powder.

4. The device for leaking stoppage under pressure, repairing and long-acting anticorrosion of a composite layer of a pipeline according to any one of claims 1 to 3, wherein the flame-retardant anticorrosion belt layer is made of a flame-retardant anticorrosion belt, wherein the flame-retardant anticorrosion belt comprises the following raw materials in percentage by mass: 7-11% of flame-retardant non-woven fabric, 25-35% of epoxidized base oil, 11-15% of silicone resin, 1-2% of antioxidant, 4-8% of sterilizing agent, 3-7% of hydrogenated castor oil derivative, 4-6% of soybean lecithin, 3-7% of fumed silica, 8-12% of pyrophyllite powder, 6-10% of brucite powder and 5-10% of metal corrosion inhibition additive.

5. The device for leaking stoppage, repairing and long-acting anticorrosion of the composite layer under pressure of the pipeline according to claim 4, wherein the oily barrier layer is prepared by mixing an oil-separating base coat component A and an oil-separating base coat component B in a volume ratio of 0.8-1.5: 1, and the oil-separating base coat component A comprises the following raw materials in percentage by mass: 8-12% of liquid epoxy resin, 9-12.5% of polypropylene glycol diglycidyl ether, 41-60% of pentaerythritol tetra-3-mercaptopropionate, 0.5-9% of phenolic aldehyde amine I, 1-40% of phenolic aldehyde amine II and 301.2-6% of DMP-3; the oil removal base coat component B comprises the following raw materials in percentage by mass: 64-80% of modified epoxy resin, 0.3-1.5% of dispersing agent, 0.1-1.2% of defoaming agent, 0.2-2% of gamma-aminopropyltriethoxysilane, 0.3-2.4% of fumed silica, 0.4-5% of rutile titanium dioxide, 4-10% of zinc phosphate, 2-5% of tannin secondary doped polyaniline, 4-8% of non-floating aluminum powder and 2-7% of mica powder.

6. The apparatus for repairing a pipeline with pressure plugging and for long-acting anticorrosion of multi-layer as claimed in claim 5, wherein the component A of the plugging agent has excessive mercapto group, the component B of the plugging agent has excessive epoxy group, and the excessive mercapto group in the plugging block is 10-20%.

7. The apparatus for repairing a pipeline with pressure leakage and repairing and long-acting anticorrosion of a multi-layer according to claim 6, wherein the epoxy group in the reinforcing layer is excessive by 3-8%, the amine group in the anticorrosion paste is excessive by 5-12%, and the epoxy group in the anticorrosion belt layer is excessive by 10-20%.

8. The device for leaking stoppage, repairing and long-acting corrosion prevention of a pipeline under pressure as claimed in claim 7, wherein the metal corrosion inhibition additive comprises a rust converting agent, polyaniline and a metal corrosion inhibitor in a mass part ratio of 2:1:1, wherein the rust converting agent is a polyphosphoric acid-tannic acid type rust converting agent which comprises the following raw materials in percentage by mass: 45% of polyphosphoric acid, 1% of tannic acid, 1% of zinc powder, 5% of acetic acid, 1% of urotropine, 10% of glycerol and 5% of divalent zinc ions; the polyaniline is functional acid secondary doped polyaniline with an anti-corrosion effect; the metal corrosion inhibitor is a compound metal corrosion inhibitor which has an inhibiting effect on the electrochemical processes of a cathode and an anode.

9. A construction method for repairing pipeline leakage under pressure and long-acting anticorrosion of a compound layer is characterized in that the construction method adopts the device for repairing pipeline leakage under pressure and long-acting anticorrosion of a compound layer as claimed in any one of the claims 1-8, and the construction method comprises the following steps:

(1) cleaning the surface of the metal pipeline structure in the construction area, removing oil stains, salt and water, and polishing to a standard of St2 or above until no steel prick, attachment, oxide skin or obvious bubbling exists on the surface of the metal pipeline structure;

(2) one third to one half of the length of a strip-shaped plugging block is deeply inserted into the pipeline through a leakage point on the pipeline, then the plugging block positioned outside the pipeline is bonded on the outer wall of the pipeline and is completely cured at the normal temperature for 6-10 minutes, then the surface of the cured plugging block positioned outside the pipeline is polished by abrasive paper until the surface is flat and burr-free, then a fast-curing special epoxy repair resin main agent and a curing agent are uniformly mixed and then coated on the surface of the plugging block in a brush coating or blade coating mode and extends by 3cm-5cm, then a carbon fiber felt is laid on the just-coated epoxy repair resin layer, and the epoxy repair resin liquid is completely immersed in the fiber felt layer and is cured for 20-30 minutes at the normal temperature;

(3) uniformly coating an anti-corrosion paste on the surface of the construction area after the treatment in the step (1) so as to form an anti-corrosion paste layer, wherein the material amount of the anti-corrosion paste is 150-500g/m²The coating thickness is 60-300 μm;

(4) coating the flame-retardant anti-corrosion belt on the outer surface of the anti-corrosion paste layer so as to form a flame-retardant anti-corrosion belt layer, wherein the layers between two adjacent flame-retardant anti-corrosion belts are overlapped by 3-4 cm, and the two sections of flame-retardant anti-corrosion belts are overlapped by 10 cm;

(5) brushing 2-3 times of oily materials on the outer surface of the flame-retardant anti-corrosion belt layer to form an oily barrier layer, wherein the brushing construction interval of each oily material is more than 1-2 hours at normal temperature;

(6) extending the surface of the oily barrier layer outwards to form an epitaxial region, and then coating the surface of the cured oily barrier layer and the epitaxial region to manufacture an anti-corrosion protective cover;

(7) and (3) applying a weather-resistant surface coating in the outer surface of the anti-corrosion protection cover and the region extending by 2cm around the outer surface so as to form a stain-resistant weather-resistant surface coating on the outermost layer of the anti-corrosion protection cover.

10. The construction method for the pressurized plugging repair and the long-acting corrosion prevention of the multi-layer of the pipeline according to claim 9, wherein the step (2) is specifically as follows:

taking a proper amount of plugging agent, fully kneading the component A of the plugging agent and the component B of the plugging agent by two hands until the components are uniform and have obvious burning sensation, kneading the components into a strip shape, then extending one third to one half of the length of the strip-shaped plugging block into the pipeline through a leakage point on the pipeline to realize plugging of a large opening with a dew point, then grinding and coating the strip-shaped plugging block at the position of the leakage hole by fingers until no obvious air leakage exists in the plugging, then manually pasting the kneaded strip-shaped plugging agent on the leakage point along the periphery of the pipeline, extruding the plugging agent towards the two ends of the pipeline by the fingers to enable a plugging agent plugging layer to extend towards the two ends of the pipeline to be in a state of thick middle edge, expanding the covering area of the plugging agent to ensure that a large contact surface is obtained, simultaneously trowelling the plugging agent towards the extending direction by extrusion to ensure that the surface around the leakage point is in close contact with the surface, and then bonding the plugging block positioned outside the pipeline on the outer wall of the pipeline, completely curing at normal temperature for 6-10 minutes;

the surface of a cured leaking stoppage block positioned outside a pipeline is polished by abrasive paper until the surface is smooth and burr-free, then a fast-curing special epoxy repair resin main agent and a curing agent are uniformly mixed, then the mixture is coated on the surface of the leaking stoppage block by adopting a brush coating or blade coating mode and extends by 3cm-5cm, then a carbon fiber felt is laid on the just-coated epoxy repair resin layer, the fiber felt layer is completely immersed by epoxy repair resin liquid, and the curing is carried out for 20-30 min at normal temperature.

Technical Field

The invention relates to the technical field of surface engineering, in particular to a pipeline plugging repair and multi-layer long-acting anticorrosion device with pressure and a construction method thereof.

Background

The urban pipeline is an important component of municipal supporting facilities and is related to daily life of thousands of households. In the service process of an urban pipe network, buried pipelines mainly face severe soil corrosion, ground parts are mainly damaged by the corrosion of the atmospheric environment, and effective corrosion protection measures are mostly taken by operation management enterprises aiming at buried and ground main pipelines. However, the complex corrosion problem of the pipeline at the transition position from the underground position to the above ground position is often ignored, the pipeline at the position is generally called as an outlet pipe part, the corrosion problem of the pipeline not only has the characteristics of soil corrosion and atmospheric corrosion, but also faces the damage of dry-wet cycle, vibration and external force, the local corrosion phenomena such as obvious crevice corrosion, stress corrosion and pitting corrosion occur, and especially the corrosion of the welding point, the flange, the valve and other parts is more serious.

On-site investigation has found that, in the case where the pipelines in the buried part and the house part are not seriously corroded, the pipelines in the place-out part mostly show serious corrosion damage within only a few years of installation and use. Taking a natural gas pipeline as an example, in some districts where natural gas is used earlier, the parts of buried pipelines exposed out of the ground but not before entering the home are seriously corroded, and the corrosion is particularly serious at the connecting parts (usually adopted for connection) of underground pipelines and pipelines above the ground; even a certain number of pipelines are locally rusted and perforated at the outlet part which is close to the underground pipeline, so that great potential safety hazards exist, and the operation safety of the urban natural gas pipe network is seriously influenced.

Corrosion of the pipeline can lead to unplanned maintenance, replacement, and unplanned downtime of the pipeline equipment, resulting in direct and indirect economic losses. Serious local corrosion easily causes leakage accidents of pipeline perforation, and can cause explosion and fire except environment pollution. Most urban pipelines are densely populated in residential areas, and serious casualties and serious property loss are caused once accidents occur. Therefore, it is necessary to apply an effective corrosion prevention treatment to the pipeline, particularly to the pipeline in the place where the corrosion is most severe, as soon as possible, and to prevent the corrosion in advance, both from the viewpoint of economy and safety.

In the daily maintenance process of the gas pipeline, the pipeline which is corroded and has caused perforation is generally subjected to leak stoppage treatment, and then a 3PE heat-shrinkable belt is mostly adopted for coating protection, but due to the limitation of the operation space of the site where the pipeline is located, the heat-shrinkable belt is difficult to achieve compact sealing, a certain gap usually exists, and the operation life is short; moreover, rainwater, dew and other water on the surface of the vertical pipe flow downwards along the surface of the pipeline for a long time, so that the rainwater, the dew and the other water are easy to permeate into a gap between the 3PE layer and the pipeline, the surface of the pipeline is rusted again in the near future, and the corrosion is accelerated under the condition that naked eyes cannot find the rainwater, so that great hidden danger is brought.

The Chinese invention patent CN107955531A discloses a flame-retardant multi-layer coating anticorrosion system and a construction method thereof, and the method adopts anticorrosion paste, a flame-retardant anticorrosion belt, an oil-separating bottom coating, a flame-retardant non-metal protective cover, a contamination-resistant top coating and the like, and achieves the purpose of anticorrosion protection through a series of steps. It is only applicable to cases where the structure is intact and no perforations appear in the metal surface. And lack of protective repair measures for pipes that have corroded to create perforations.

Disclosure of Invention

The invention provides a pipeline pressurized plugging repair and multi-layer long-acting anticorrosion device and a construction method thereof.

The specific technical scheme provided by the invention is as follows:

according to a first aspect, the invention provides a pipeline belt-pressing leaking stoppage repairing and multi-layer long-acting anti-corrosion device which comprises a leaking stoppage block, a reinforcing layer, an anti-corrosion plaster layer, a flame-retardant anti-corrosion belt layer, an oily blocking layer, an anti-corrosion protection cover and a stain-resistant weather-resistant coating layer, wherein the leaking stoppage block, the reinforcing layer, the anti-corrosion plaster layer, the flame-retardant anti-corrosion belt layer, the oily blocking layer, the anti-corrosion protection cover and the stain-resistant weather-resistant coating layer are sequentially distributed from inside to outside, the leaking stoppage block penetrates into the pipeline through a corrosion perforation damage point on the pipeline, the leaking stoppage block comprises an inner pipe part, a pipe wall part and an outer pipe part, the outer pipe part is larger than the inner pipe part, the inner pipe part is attached and fixed to the inner wall.

Optionally, the plugging block is prepared by curing a plugging agent, and the plugging agent comprises a plugging agent A component and a plugging agent B component, wherein the plugging agent A component comprises the following raw materials in percentage by mass: 40-60% of polythiol, 8-10% of epoxy resin, 2-5% of amine-terminated polyether, 0.3-1% of phenol, 5-8% of fumed silica, 18-22% of superfine silicon iron powder, 1.5-3.5% of diatomite and 1-3% of tannin secondary doped polyaniline; the component B of the plugging agent comprises the following raw materials in percentage by mass: 35-45% of epoxy resin, 0.3-1.0% of gamma-glycidyl ether oxypropyl trimethoxy silane, 7-11% of fumed silica, 8-12% of amine terminated polyether, 3-5% of isophorone diisocyanate, 20-25% of iron powder, 4-8% of potassium titanate whisker and 3-10% of metal corrosion inhibition additive.

Optionally, the plugging agent is prepared by uniformly mixing a component A of the plugging agent and a component B of the plugging agent in a volume ratio of 1:1, and the anti-corrosion paste layer comprises the following raw materials in percentage by mass: 15-40% of base oil, 8-20% of polyether polyamine, 0.8-1.5% of antioxidant, 5-8% of sterilizing agent, 6-10% of dispersing penetrating agent, 3-8% of hydrogenated castor oil derivative, 3-8% of fumed silica, 1-4% of pigment, 6-12% of metal corrosion inhibition additive and 10-24% of shell powder.

Optionally, the flame-retardant anticorrosion belt layer is made of a flame-retardant anticorrosion belt, wherein the flame-retardant anticorrosion belt comprises the following raw materials in percentage by mass: 7-11% of flame-retardant non-woven fabric, 25-35% of epoxidized base oil, 11-15% of silicone resin, 1-2% of antioxidant, 4-8% of sterilizing agent, 3-7% of hydrogenated castor oil derivative, 4-6% of soybean lecithin, 3-7% of fumed silica, 8-12% of pyrophyllite powder, 6-10% of brucite powder and 5-10% of metal corrosion inhibition additive.

Optionally, the oily barrier layer is prepared by mixing an oil removal base coat component A and an oil removal base coat component B in a volume ratio of 0.8-1.5: 1, and the oil removal base coat component A comprises the following raw materials in percentage by mass: 8-12% of liquid epoxy resin, 9-12.5% of polypropylene glycol diglycidyl ether, 41-60% of pentaerythritol tetra-3-mercaptopropionate, 0.5-9% of phenolic aldehyde amine I, 1-40% of phenolic aldehyde amine II and 301.2-6% of DMP-3; the oil removal base coat component B comprises the following raw materials in percentage by mass: 64-80% of modified epoxy resin, 0.3-1.5% of dispersing agent, 0.1-1.2% of defoaming agent, 0.2-2% of gamma-aminopropyltriethoxysilane, 0.3-2.4% of fumed silica, 0.4-5% of rutile titanium dioxide, 4-10% of zinc phosphate, 2-5% of tannin secondary doped polyaniline, 4-8% of non-floating aluminum powder and 2-7% of mica powder.

Optionally, the sulfydryl in the plugging agent A component is excessive, the epoxy group in the plugging agent B component is excessive, and the sulfydryl in the plugging block is excessive by 10-20%.

Optionally, the epoxy group in the reinforcing layer is excessive by 3-8%, the amino group in the anti-corrosion paste is excessive by 5-12%, and the epoxy group in the anti-corrosion tape layer is excessive by 10-20%.

Optionally, the metal corrosion inhibition additive comprises a rust converting agent, polyaniline and a metal corrosion inhibitor in a mass part ratio of 2:1:1, wherein the rust converting agent is a polyphosphoric acid-tannic acid type rust converting agent, and the polyphosphoric acid-tannic acid type rust converting agent comprises the following raw materials in percentage by mass: 45% of polyphosphoric acid, 1% of tannic acid, 1% of zinc powder, 5% of acetic acid, 1% of urotropine, 10% of glycerol and 5% of divalent zinc ions; the polyaniline is functional acid secondary doped polyaniline with an anti-corrosion effect; the metal corrosion inhibitor is a compound metal corrosion inhibitor which has an inhibiting effect on the electrochemical processes of a cathode and an anode.

On the other hand, the invention also provides a construction method for the pressurized plugging repair and the long-acting corrosion prevention of the compound layer of the pipeline, which comprises the following steps:

(1) cleaning the surface of the metal pipeline structure in the construction area, removing oil stains, salt and water, and polishing to a standard of St2 or above until no steel prick, attachment, oxide skin or obvious bubbling exists on the surface of the metal pipeline structure;

(2) one third to one half of the length of a strip-shaped plugging block is deeply inserted into the pipeline through a leakage point on the pipeline, then the plugging block positioned outside the pipeline is bonded on the outer wall of the pipeline and is completely cured at the normal temperature for 6-10 minutes, then the surface of the cured plugging block positioned outside the pipeline is polished by abrasive paper until the surface is flat and burr-free, then a fast-curing special epoxy repair resin main agent and a curing agent are uniformly mixed and then coated on the surface of the plugging block in a brush coating or blade coating mode and extends by 3cm-5cm, then a carbon fiber felt is laid on the just-coated epoxy repair resin layer, and the epoxy repair resin liquid is completely immersed in the fiber felt layer and is cured for 20-30 minutes at the normal temperature;

(3) uniformly coating an anti-corrosion paste on the surface of the construction area after the treatment in the step (1) so as to form an anti-corrosion paste layer, wherein the material amount of the anti-corrosion paste is 150-500g/m²The coating thickness is 80-300 μm;

(4) coating the flame-retardant anti-corrosion belt on the outer surface of the anti-corrosion paste layer so as to form a flame-retardant anti-corrosion belt layer, wherein the layers between two adjacent flame-retardant anti-corrosion belts are overlapped by 3-4 cm, and the two sections of flame-retardant anti-corrosion belts are overlapped by 10 cm;

(5) brushing 2-3 times of oily materials on the outer surface of the flame-retardant anti-corrosion belt layer so as to form an oily barrier layer, wherein the brushing construction interval of each oily material is more than 6 hours;

(6) extending the surface of the oily barrier layer outwards to form an epitaxial region, and then coating the surface of the cured oily barrier layer and the epitaxial region to manufacture an anti-corrosion protective cover;

(7) and (3) applying a weather-resistant surface coating in the outer surface of the anti-corrosion protection cover and the region extending by 2cm around the outer surface so as to form a stain-resistant weather-resistant surface coating on the outermost layer of the anti-corrosion protection cover.

Optionally, the step (2) specifically includes:

taking a proper amount of plugging agent, fully kneading the component A of the plugging agent and the component B of the plugging agent by two hands until the components are uniform and have obvious burning sensation, kneading the components into a strip shape, then extending one third to one half of the length of the strip-shaped plugging block into the pipeline through a leakage point on the pipeline to realize plugging of a large opening with a dew point, then grinding and coating the strip-shaped plugging block at the position of the leakage hole by fingers until no obvious air leakage exists in the plugging, then manually pasting the kneaded strip-shaped plugging agent on the leakage point along the periphery of the pipeline, extruding the plugging agent towards the two ends of the pipeline by the fingers to enable a plugging agent plugging layer to extend towards the two ends of the pipeline to be in a state of thick middle edge, expanding the covering area of the plugging agent to ensure that a large contact surface is obtained, simultaneously trowelling the plugging agent towards the extending direction by extrusion to ensure that the surface around the leakage point is in close contact with the surface, and then bonding the plugging block positioned outside the pipeline on the outer wall of the pipeline, completely curing at normal temperature for 6-10 minutes;

the surface of a cured leaking stoppage block positioned outside a pipeline is polished by abrasive paper until the surface is smooth and burr-free, then a fast-curing special epoxy repair resin main agent and a curing agent are uniformly mixed, then the mixture is coated on the surface of the leaking stoppage block by adopting a brush coating or blade coating mode and extends by 3cm-5cm, then a carbon fiber felt is laid on the just-coated epoxy repair resin layer, the fiber felt layer is completely immersed by epoxy repair resin liquid, and the curing is carried out for 20-30 min at normal temperature.

The invention has the following beneficial effects:

the embodiment of the invention provides a pipeline pressurized leaking stoppage repairing and multi-layer long-acting anti-corrosion device and a construction method thereof, wherein a leaking stoppage block is adopted to perform leaking stoppage repairing on a corrosion pit hole on a pipeline, then quick-setting special epoxy repairing resin with excellent corrosion resistance and a carbon fiber felt are adopted to reinforce a repairing part, the repairing part and the pipeline form a whole after being reinforced, and the normal vibration and occasional vibration with certain strength can not influence the combination between a leaking stoppage reinforcing layer and the pipeline in normal operation; after the multi-layer long-acting anticorrosion scheme is adopted, the corrosion progress can be stopped at present, the surface of the protected pipeline is not influenced by corrosion for a long time in the future, the purpose of long-acting anticorrosion is achieved, the pipeline is effectively protected from being damaged by corrosion, and the normal operation of gas delivery is ensured; the anti-fouling and weather-resistant protective system adopts a six-layer protective system of 'leaking stoppage and strengthening layer + anti-corrosion paste + flame-retardant anti-corrosion belt + oily barrier layer + anti-corrosion protective cover + fouling and weather-resistant surface coating', can be tightly combined with a substrate due to excellent following performance, a protective film formed by the anti-corrosion paste and the flame-retardant anti-corrosion belt can be complexed with surface oxide of the substrate to prevent secondary corrosion, meanwhile, corrosion of corrosive media to the substrate is isolated, the external oily material barrier layer and the non-metal protective cover form sealing protection on corrosion-resistant components, the corrosion-resistant components are prevented from losing, the fouling-resistant surface coating of the flame-retardant non-metal protective cover is outstanding in anti-fouling performance and excellent in weather resistance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a device for repairing pipeline leakage under pressure and long-acting corrosion protection with multiple layers according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1 according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The device for repairing the pipeline with pressure leakage and long-acting anticorrosion of the compound layer and the construction method thereof provided by the embodiment of the invention can be used for steel structures in the fields of petrochemical industry, steel, electric power, coastal building facilities and the like, and are particularly suitable for repairing the pipeline with pressure leakage and long-acting anticorrosion of the compound layer.