CN115727224A - Microbial corrosion-resistant repair structure and method for repaired pipe joint - Google Patents
Microbial corrosion-resistant repair structure and method for repaired pipe joint Download PDFInfo
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- CN115727224A CN115727224A CN202211557047.9A CN202211557047A CN115727224A CN 115727224 A CN115727224 A CN 115727224A CN 202211557047 A CN202211557047 A CN 202211557047A CN 115727224 A CN115727224 A CN 115727224A
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Abstract
The invention discloses a microbial corrosion-resistant repair structure and method for a repaired mouth of a pipeline, and relates to the technical field of corrosion control of oil and gas pipelines. Pipeline repaired mouth anticorrosion restoration structure is used for restraining burying the microbial corrosion of ground insulating pipeline repaired mouth, wherein, pipeline repaired mouth anticorrosion restoration structure includes: the first structural layer is in direct coating contact with a repaired mouth of a target pipeline; the second structural layer is positioned at a first preset position above the first structural layer; the third structural layer comprises two preset prefabricated polyurethane heat-insulation tile blocks with the thickness of 3.5-4.5mm, and is embedded in a second preset position of the second structural layer; and the fourth structural layer is coated on a third preset position above the third structural layer. The method solves the problems that the prior slowing measures aiming at the microbial corrosion outside the buried pipeline are few, and the prior method for repairing the repaired mouth of the heat-preservation pipeline can not meet the requirement of inhibiting the microbial corrosion. The technical effects of improving the anticorrosion repair effect and reducing the microbial corrosion risk of the repaired mouth of the heat-insulating pipeline are achieved.
Description
Technical Field
The invention relates to the technical field of corrosion control of oil and gas pipelines, in particular to a pipeline joint coating corrosion prevention repairing structure and method for microbial corrosion.
Background
The heat-insulating structure is adopted for the high-condensation-point long-distance crude oil conveying pipeline, so that heat loss can be reduced, the number of middle heating adhesion is reduced, and the effects of energy conservation and consumption reduction are achieved. The anticorrosion structure of the heat-insulating pipeline consists of three layers of anticorrosion priming paint, a heat-insulating layer and an outer anticorrosion layer. The anticorrosion repaired mouth of the long-distance pipeline is usually constructed by field operation, the construction quality is difficult to guarantee, the repaired mouth position is a weak link for the anticorrosion of the whole pipeline, in recent years, the repaired mouth of part of the long-distance pipeline has serious microbial corrosion problem, the main cause of corrosion is failure of an anticorrosion layer at the repaired mouth position, or an outer anticorrosion layer and a heat insulation layer are unshelled to generate larger deformation, the sealing failure of a repaired mouth waterproof cap causes the underground water and corrosive microorganisms contained in the underground water to enter the repaired mouth, the primer fails under the long-time soaking effect, in an anoxic environment with more underground water, the microorganisms continuously propagate by taking the loose heat insulation layer as a carbon source to cause the corrosion of a pipe body, and meanwhile, due to the cathode protection shielding effect of the repaired mouth, the cathode protection current is difficult to provide protection, and the serious microbial corrosion of the pipe body at the repaired mouth position is caused. For a repaired mouth which is failed due to microbial corrosion, the repaired mouth anticorrosion repair structure adopted in excavation detection and repair can meet the requirement of inhibiting microbial corrosion. In the prior art, the repair structure and the repair method of the anticorrosion and insulation layer of the insulation pipeline mainly utilize the anticorrosion effect and the anti-deformation capability of a viscoelastic body, the insulation effect of polyurethane foam and the mechanical damage resistance of a hot-baking pressure sensitive tape, namely, the repair structure is formed by the viscoelastic body adhesive tape layer, the polyurethane foam layer and the hot-baking pressure sensitive adhesive tape layer, but still has the problem that the requirement for inhibiting microbial corrosion cannot be met.
Disclosure of Invention
The invention aims to provide a microbial corrosion-resistant pipeline joint coating repair structure and a microbial corrosion-resistant pipeline joint coating repair method, which are used for solving the problems that the conventional microbial corrosion slowing measures for the outer part of a buried pipeline are few, and the conventional heat-insulating pipeline joint coating repair method cannot meet the requirement of inhibiting microbial corrosion. Finally, the technical effects of improving the anticorrosion repair effect and reducing the microbial corrosion risk of the repaired mouth of the heat-insulating pipeline are achieved.
In view of the above problems, the present invention provides a microbial corrosion-resistant repair structure and method for repairing a pipe joint.
In a first aspect, the invention provides a microbial corrosion-resistant repair structure for a repaired pipe opening. The utility model provides a pipeline repaired mouth anticorrosion restoration structure of microbial corrosion is used for restraining the microbial corrosion of burying ground insulating pipeline repaired mouth, wherein, a pipeline repaired mouth anticorrosion restoration structure of microbial corrosion includes: the first structural layer is in direct coating contact with a target pipeline joint, and the thickness of the first structural layer is 1.0-1.5mm; the second structural layer is positioned at a first preset position above the first structural layer; the third structural layer comprises two preset prefabricated polyurethane heat-insulation tile blocks with the thickness of 3.5-4.5mm, and the preset prefabricated polyurethane heat-insulation tile blocks are embedded in a second preset position of the second structural layer; and the fourth structural layer is coated at a third preset position above the third structural layer.
Preferably, the target pipe patch includes: the target joint coating is positioned on a target pipeline and comprises a pipeline girth weld; a first patch side located on a first side of the target patch; a second patch side located on a second side of the target patch, the second side opposing the first side.
Preferably, the target pipeline joint, further comprising: the heat insulation layer comprises a first heat insulation layer and a second heat insulation layer, the first heat insulation layer is arranged above the first joint side, and the second heat insulation layer is arranged above the second joint side; the anticorrosive coating comprises a first anticorrosive coating and a second anticorrosive coating, wherein the first anticorrosive coating is arranged above the first heat preservation layer, and the second anticorrosive coating is arranged above the second heat preservation layer.
Preferably, the first structural layer includes: the primer layer refers to a common epoxy primer; the finishing paint layer is a nano silver peroxide epoxy finishing paint prepared by a preset preparation scheme, and the finishing paint layer is coated above the priming paint layer.
Preferably, the second structural layer includes: the petrolatum daub is coated at a fourth preset position based on a preset coating scheme, and the coating thickness of the petrolatum daub is 5.0-15.0mm; the petrolatum area, the petrolatum area twines based on predetermineeing the winding scheme in petrolatum daub top, just, the width in petrolatum area is 10 ± 0.5cm.
Preferably, the preset prefabricated polyurethane heat-insulation tile block is semicircular, and the inner diameter of the preset prefabricated polyurethane heat-insulation tile block is matched with the target pipeline.
In another aspect, the present invention further provides a microbial corrosion-resistant repair method for repairing a joint of a buried thermal insulation pipeline, which is used for inhibiting microbial corrosion of the joint of the buried thermal insulation pipeline by using the microbial corrosion-resistant repair structure for repairing a joint of a pipeline, wherein the method includes: obtaining a target pipeline joint based on the target pipeline; obtaining a preset preparation scheme, and preparing and obtaining the nano silver peroxide epoxy finish paint based on the preset preparation scheme; obtaining a common epoxy primer, and forming a first structural layer by taking the common epoxy primer as the primer layer and the nano silver peroxide epoxy finish as the finish layer; obtaining petrolatum daub and petrolatum belt in sequence; forming a second structural layer based on the petrolatum daub and the petrolatum belt; obtaining two preset prefabricated polyurethane heat-insulation tile blocks, and forming a third structural layer based on the two preset prefabricated polyurethane heat-insulation tile blocks; obtaining a heat-shrinkable tape, and taking the heat-shrinkable tape as a fourth structural layer; and sequentially coating the first structural layer, the second structural layer, the third structural layer and the fourth structural layer on the target pipeline joint so as to form the pipeline joint anticorrosion repair structure.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a microbial corrosion-resistant repair structure and method for a repaired mouth of a pipeline, wherein the microbial corrosion-resistant repair structure for the repaired mouth of the pipeline is used for inhibiting microbial corrosion of the repaired mouth of a buried heat-insulating pipeline, and comprises the following steps: the first structural layer is in direct coating contact with a target pipeline joint, and the thickness of the first structural layer is 1.0-1.5mm; the second structural layer is positioned at a first preset position above the first structural layer; the third structural layer comprises two preset prefabricated polyurethane heat-insulation tile blocks with the thickness of 3.5-4.5mm, and the preset prefabricated polyurethane heat-insulation tile blocks are embedded in a second preset position of the second structural layer; and the fourth structural layer is coated at a third preset position above the third structural layer. The method solves the problems that the existing slowing measures for microbial corrosion outside the buried pipeline are few, and the existing repairing method for the repaired mouth of the heat-insulating pipeline cannot meet the requirement of inhibiting microbial corrosion. The technical effects of improving the anticorrosion repair effect and reducing the microbial corrosion risk of the repaired mouth of the heat-insulating pipeline are achieved.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained according to the provided drawings without inventive effort.
FIG. 1 is a schematic structural view of a microbe-corroded pipe joint coating corrosion-prevention repair structure according to the present invention;
FIG. 2 is a schematic structural view of a target pipe joint of a microbial corrosion-resistant repair structure for a pipe joint according to the present invention;
FIG. 3 is another schematic structural view of a target pipe joint of a microbial-corroded corrosion-resistant repair structure for a pipe joint according to the present invention;
FIG. 4 is a schematic structural diagram of a second structural layer of the microbial corrosion-resistant repair structure for a pipe joint coating according to the present invention;
FIG. 5 is a schematic flow chart of a method for repairing a joint coating by microbial corrosion.
Description of reference numerals:
the composite insulation board comprises a first structural layer 1, a second structural layer 2, petrolatum daub 21, a petrolatum belt 22, a third structural layer 3, a fourth structural layer 4, a target opening A1, a first opening side A2, a second opening side A3, a first insulation layer A21, a second insulation layer A31, a first anticorrosive layer A211 and a second anticorrosive layer A311.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous details are set forth to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
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 invention belongs. The terminology used herein in the description of the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
Example one
As shown in fig. 1, the invention discloses a microbial corrosion-resistant repair structure for a repaired mouth of a pipeline, which is used for inhibiting microbial corrosion of the repaired mouth of a buried heat-insulating pipeline, wherein the microbial corrosion-resistant repair structure for the repaired mouth of the pipeline comprises:
the first structural layer 1 is in direct coating contact with a target pipeline repaired mouth, and the thickness of the first structural layer 1 is 1.0-1.5mm;
further, the first structural layer includes:
the primer layer refers to a common epoxy primer;
the finishing paint layer is a nano silver peroxide epoxy finishing paint prepared by a preset preparation scheme, and the finishing paint layer is coated above the priming paint layer.
The second structural layer 2 is positioned at a first preset position above the first structural layer 1;
further, as shown in fig. 4, the second structural layer includes:
the petrolatum daub 21 is coated at a fourth preset position based on a preset coating scheme, and the coating thickness of the petrolatum daub 21 is 5.0-15.0mm;
a petrolatum belt 22, the petrolatum belt 22 is wound above the petrolatum cement 21 based on a preset winding scheme, and the width of the petrolatum belt 22 is 10 ± 0.5cm.
A third structural layer 3, wherein the third structural layer 3 comprises two preset prefabricated polyurethane insulation tiles with the thickness of 3.5-4.5mm, and the preset prefabricated polyurethane insulation tiles are embedded in a second preset position of the second structural layer 2;
furthermore, the preset prefabricated polyurethane heat-insulation tile block is semicircular, and the inner diameter of the preset prefabricated polyurethane heat-insulation tile block is matched with the target pipeline.
And the fourth structural layer 4 is coated on a third preset position above the third structural layer 3.
Particularly, the pipeline joint coating anticorrosion restoration structure comprehensively utilizes the advantages of the antibacterial coating and the anticorrosion coating with strong deformation resistance, is used for restoring the heat preservation joint coating in the microbial corrosion environment, and finally achieves the effects of improving the anticorrosion restoration effect and reducing the microbial corrosion risk of the heat preservation pipeline joint coating. The pipeline joint coating anticorrosion repairing structure comprises a first structural layer 1, a second structural layer 2, a third structural layer 3 and a fourth structural layer 4.
The first structural layer 1 consists of the primer layer and the finish paint layer, the primer layer is a common epoxy primer, the finish paint layer is a nano silver peroxide epoxy finish paint prepared by a preset preparation scheme, and in addition, the finish paint layer is coated on the primer layer. The preset preparation scheme specifically comprises the steps of firstly, preparing nano silver peroxide particles by adopting a liquid-phase oxidation precipitation method, wherein the particle size of the obtained nano silver peroxide particles is 20-100 nm, and the mass content of the nano silver peroxide in the prepared particles is 40-80%; then, adopting a mixed solution of absolute ethyl alcohol and gamma-aminopropyltriethoxysilane as a modified dispersant, wherein the volume mixing ratio of the two substances is between 1; then, 100g-200g of nano silver peroxide is added into every 100 ml of modified dispersant, and double-component liquid epoxy paint is used as finish paint; and finally, dispersing the modified nano silver peroxide into the epoxy finish paint by adopting a method of ultrasonic oscillation and mechanical stirring, and adding a curing agent and then brushing to form the finish paint layer.
The second structural layer 2 is located at a first preset position above the first structural layer 1. The second structural layer 2 is composed of petrolatum cement 21 and petrolatum belt 22. The petrolatum daub 21 is coated on a fourth preset position based on a preset coating scheme, and the coating thickness of the petrolatum daub 21 is 5.0-15.0mm. The petrolatum belt 22 is wound above the petrolatum mortar 21 based on a preset winding scheme, and the width of the petrolatum belt 22 is 10 ± 0.5cm. Specifically, the petrolatum cement 21 is firstly applied to the pipe insulation foam, namely, the intersection between the first opening side A2 and the target opening A1 and the intersection between the second opening side A3 and the target opening A1, and the coating thickness is 5mm to 15mm, and the petrolatum cement 21 is coated on the first insulation layer a21 and the second insulation layer a 31. For example, the length of the coating of the petrolatum cement 21 in the direction of the pipe girth weld of the target joint A1 is 3cm, and the width in the direction of covering the first anticorrosive layer a211 and the second anticorrosive layer a311 is 4cm. By respectively coating and prolonging the intersection parts of the first patch side A2 and the target patch A1 and the intersection parts of the second patch side A3 and the target patch A1, the sealing effect is improved, and underground water is prevented from entering gaps, so that the patches are corroded.
Further, after the intersection of the first patch side A2 and the target patch A1 and the intersection of the second patch side A3 and the target patch A1 are respectively coated and extended by the petrolatum cement 21, the intersection is wound and reinforced by the petrolatum tape 22. For example, a 10 cm-wide petrolatum tape is wound on the epoxy primer from one end by a winding method to cover the first anticorrosive layer a211, the second anticorrosive layer a311 and the entire target opening A1, and meanwhile, the width of the petrolatum tape 22 is greater than 5cm of each of the two ends of the petrolatum glue paste 21, and the winding and overlapping width is 30% -50% of the width of the petrolatum tape. The winding of the petrolatum belt 22 has good adhesive property and waterproof property, and has certain mechanical strength, so that the petrolatum belt is wound on the first structural layer 1 and the petrolatum daub 21, and the technical aims of supporting and strengthening the anticorrosion effect are achieved.
The third structural layer 3 comprises two preset prefabricated polyurethane insulation tiles with the thickness of 3.5-4.5mm, and the preset prefabricated polyurethane insulation tiles are embedded in a second preset position of the second structural layer 2. The preset prefabricated polyurethane heat-insulation tile block is semicircular, the preset prefabricated polyurethane heat-insulation tile block can be embedded in a second preset position of the second structure layer 2, and the inner diameter of the preset prefabricated polyurethane heat-insulation tile block must be matched with the target pipeline. Further, the fourth structural layer 4 is a heat shrinkable tape and covers a third preset position above the third structural layer 3. For example, a heat shrinkable tape is adhered to and covered on the third structural layer 3 at a third preset position, where the third preset position is a range of a covering area larger than that of the second structural layer 2.
Further, as shown in fig. 2, the target pipe patch includes:
the target joint coating A1 is positioned on a target pipeline and comprises a pipeline girth weld;
a first patch side A2, the first patch side A2 being located on a first side of the target patch A1;
a second patch side A3, the second patch side A3 being located on a second side of the target patch A1, and the second side being opposite to the first side.
Further, as shown in fig. 3, the target pipeline joint further includes:
the heat insulation layer comprises a first heat insulation layer A21 and a second heat insulation layer A31, the first heat insulation layer A21 is arranged above the first opening repairing side A2, and the second heat insulation layer A31 is arranged above the second opening repairing side A3;
the anticorrosive coating comprises a first anticorrosive coating A211 and a second anticorrosive coating A311, wherein the first anticorrosive coating A211 is arranged above the first heat preservation layer A21, and the second anticorrosive coating A311 is arranged above the second heat preservation layer A31.
Specifically, the target pipeline refers to any pipeline to be repaired through a pipeline joint anticorrosion repair structure, and the target pipeline joint refers to a part to be repaired of the target pipeline. The target pipeline joint comprises a target joint A1, a first joint side A2 and a second joint side A3. The target repaired mouth A1 is provided with a pipeline circumferential weld, namely a trace left after the target pipeline is subjected to welding treatment. The first patch side A2 is located at a first side of the target patch A1, the second patch side A3 is located at a second side of the target patch A1, and the second side and the first side are opposite to each other. Exemplarily, the first patch side A2 is located at the left side of the target patch A1, and the second patch side A3 is located at the right side of the target patch A1. Target repaired mouth A1 has scraped owing to welding process the original heat preservation of target pipeline and anticorrosive coating, and target repaired mouth A1's both sides, promptly first repaired mouth side A2 second repaired mouth side A3 position department the original heat preservation of target pipeline and anticorrosive coating are not scraped, promptly first repaired mouth side A2 top has covered in proper order first heat preservation A21 first anticorrosive coating A211, second repaired mouth side A3 top has covered in proper order second heat preservation A31 second anticorrosive coating A311.
In conclusion, the pipeline joint coating anti-corrosion repair structure provided by the invention has the following technical effects:
the first structural layer is in direct coating contact with a target pipeline joint, and the thickness of the first structural layer is 1.0-1.5mm; the second structural layer is positioned at a first preset position above the first structural layer; the third structural layer comprises two preset prefabricated polyurethane heat-insulation tile blocks with the thickness of 3.5-4.5mm, and the preset prefabricated polyurethane heat-insulation tile blocks are embedded in a second preset position of the second structural layer; and the fourth structural layer is coated at a third preset position above the third structural layer. The method solves the problems that the prior slowing measures aiming at the microbial corrosion outside the buried pipeline are few, and the prior method for repairing the repaired mouth of the heat-preservation pipeline can not meet the requirement of inhibiting the microbial corrosion. The technical effects of improving the anticorrosion repairing effect and reducing the microbial corrosion risk of the repaired mouth of the heat-insulating pipeline are achieved.
Example two
Referring to fig. 5, in order to more clearly explain a technical scheme of a microbial corrosion-resistant pipeline joint coating anticorrosion repair structure and method, an embodiment of the present invention provides a microbial corrosion-resistant pipeline joint coating anticorrosion repair method for controlling oil and gas pipeline corrosion by using the pipeline joint coating anticorrosion repair structure, where the pipeline joint coating anticorrosion repair method is used to repair a target pipeline joint coating by construction, so that the target pipeline joint coating is repaired into the pipeline joint coating anticorrosion repair structure according to the first embodiment, and the pipeline joint coating anticorrosion repair method includes the following steps:
step S100: obtaining a target pipeline joint based on the target pipeline;
step S200: obtaining a preset preparation scheme, and preparing and obtaining the nano silver peroxide epoxy finish paint based on the preset preparation scheme;
step S300: obtaining a common epoxy primer, and forming a first structural layer by taking the common epoxy primer as the primer layer and the nano silver peroxide epoxy finish as the finish layer;
step S400: obtaining petrolatum daub and petrolatum belt in sequence;
step S500: forming a second structural layer based on the petrolatum daub and the petrolatum belt;
step S600: obtaining two preset prefabricated polyurethane heat-insulation tile blocks, and forming a third structural layer based on the two preset prefabricated polyurethane heat-insulation tile blocks;
step S700: obtaining a heat shrinkable tape, and taking the heat shrinkable tape as a fourth structural layer;
step S800: and sequentially coating the first structural layer, the second structural layer, the third structural layer and the fourth structural layer on the target pipeline joint so as to form the pipeline joint anticorrosion repair structure.
Specifically, before the target pipe is subjected to the repair process, the target pipe is first subjected to a surface treatment. For example, the surface of the pipe body at the position of the repaired mouth is treated by adopting a sand blasting or mechanical derusting mode to remove all rust and expose metal luster, the treatment grade is required to be Sa2.5 or St3, and dust on the surface is blown clean by high-pressure air before epoxy paint is coated. Then, obtaining a preset preparation scheme, preparing and obtaining the nano silver peroxide epoxy finish paint based on the preset preparation scheme, simultaneously obtaining a common epoxy primer, and forming a first structural layer by taking the common epoxy primer as the primer layer and the nano silver peroxide epoxy finish paint as the finish paint layer. For example, the two-component liquid epoxy primer is uniformly coated on the surface of the pipe body, the original polyurethane insulation layer and the original polyethylene anticorrosive layer after being stirred, the two-component liquid epoxy primer is uniformly stirred, and the primer is coated within 20 min. The coating thickness is not less than 100 mu m, the coating thickness is measured by a wet film meter, the surface of the primer is dried after 1.5-2.5 hours of coating, then the coating of the nano silver peroxide epoxy finish paint is carried out, then the finish paint is stirred for 3-5 minutes until the finish paint is uniformly stirred, a curing agent is added, the finish paint is brushed after the uniform stirring, the finish paint is coated in a brushing way and is uniformly coated, the environmental temperature is higher than 50 ℃ during the coating, the relative air humidity is lower than 80%, and measures such as constructing a dust cover and the like are adopted to prevent dust from falling onto the primer in windy weather. In addition, except the position of the side surface of the original heat-insulating layer, the thickness of the wet film after coating of the epoxy paint is measured to be larger than 1mm. And (3) uniformly brushing the epoxy paint to prevent the paint film from sagging when the epoxy paint is not needed in the brushing process, waiting for about 3 hours after the epoxy paint is coated, and measuring and recording the thickness of the primer after the epoxy paint is dried. And after the epoxy paint is completely dried for about 5 hours, detecting the leakage by using an electric spark leakage detector, applying a voltage of 5kV, performing the next construction after the epoxy paint is qualified, polishing the surface with the diameter not less than 5cm at the position of a leakage point if the epoxy paint is unqualified, and coating and repairing by using nano silver peroxide epoxy finish paint.
Further, petrolatum cement and a petrolatum belt are sequentially obtained, and a second structural layer is formed on the basis of the petrolatum cement and the petrolatum belt. For example, the petrolatum daub is coated on two crossed parts of the first patch side and the target patch, and the second patch side and the target patch, and mainly covers the side surface of the original insulating layer and the lap joint of the original insulating layer and the patch pipeline, and the thickness of the petrolatum daub is 5-15 mm. And then, the petrolatum tape is extended by 5cm from one end of the petrolatum daub to start winding, and then the petrolatum tape is continuously wound to the cross position of the second patch side and the target patch, and is also extended by 5cm, wherein the lap joint width in the petrolatum tape winding process is 3cm-5cm. Further, two preset prefabricated polyurethane heat-insulation tile blocks are obtained, and a third structural layer is formed on the basis of the two preset prefabricated polyurethane heat-insulation tile blocks. For example, 2 insulating tiles with 90-degree radian are covered on the patch from two sides, and the joint is filled with petrolatum cement. Finally, obtaining a heat-shrinkable tape, and using the heat-shrinkable tape as a fourth structural layer. In an exemplary case, the covering length of the thermal contraction belt is 5cm-10cm greater than that of the two ends of the petrolatum belt, the thermal contraction belt is evenly baked during baking, the overlapping position of the two ends of the thermal contraction belt is located at the 12 o' clock position of the pipeline, and the two ends are mainly baked.
In conclusion, the microbial corrosion-resistant repair method for repaired mouths of pipelines has the following technical effects:
according to the pipeline joint coating anticorrosion repair structure formed by the pipeline joint coating anticorrosion repair method, the primer layer in the first structural layer is the epoxy coating with strong bonding force with the metal material, the epoxy coating has excellent permeability resistance and acid and alkali resistance, and can be well bonded with the metal matrix and the original epoxy primer when coated on the joint coating position, so that the bonding force and the corrosion resistance of the coating are improved. The finish paint of the epoxy paint is nano silver peroxide epoxy paint, wherein the nano silver peroxide contained in the epoxy paint can play a role in sterilization by releasing silver ions, effectively inhibits the attachment of microorganisms and plays a role in resisting the microbial corrosion. Between the former polyethylene anticorrosive coating of pipeline and the polyurethane heat preservation of pipeline repaired mouth position, because the easy debonding of soil stress effect forms the space, the petrolatum daub in the second structural layer can fill this space, plays effectual sealed effect, prevents that groundwater from getting into this space, avoids corrosive environment's formation. In addition, the petrolatum area in the second structural layer has fine adhesive property and waterproof performance, has certain mechanical strength simultaneously, twines and can play the effect of supporting and strengthening anticorrosive effect on epoxy primer and petrolatum daub. The preset prefabricated polyurethane heat-insulation tile blocks in the third structural layer have the main function of heat insulation, and the two preset prefabricated polyurethane heat-insulation tile blocks are filled with the petrolatum cement gum to increase the impermeability of the tile blocks and further reduce the entrance of underground water. The heat shrinkable belt of the fourth structural layer mainly acts as mechanical support and water resistance, and the two ends of the heat shrinkable belt are well baked to effectively prevent underground water from permeating into the repaired mouth.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the present invention and its equivalent technology, it is intended that the present invention also include such modifications and variations.
Claims (7)
1. The utility model provides a pipeline repaired mouth anticorrosion restoration structure of microbial corrosion, a serial communication port, pipeline repaired mouth anticorrosion restoration structure is used for restraining the microbial corrosion who buries ground insulating pipeline repaired mouth, pipeline repaired mouth anticorrosion restoration structure includes:
the first structural layer is in direct coating contact with a target pipeline joint, and the thickness of the first structural layer is 1.0-1.5mm;
the second structural layer is positioned at a first preset position above the first structural layer;
the third structural layer comprises two preset prefabricated polyurethane heat-insulation tile blocks with the thickness of 3.5-4.5mm, and the preset prefabricated polyurethane heat-insulation tile blocks are embedded in a second preset position of the second structural layer;
and the fourth structural layer is coated at a third preset position above the third structural layer.
2. The pipe joint anticorrosion repair structure of claim 1, wherein the target pipe joint comprises:
the target joint coating is positioned on a target pipeline and comprises a pipeline girth weld;
a first patch side located on a first side of the target patch;
a second patch side located on a second side of the target patch, the second side opposite the first side.
3. The pipe joint anticorrosion repair structure of claim 2, wherein the target pipe joint further comprises:
the heat insulation layer comprises a first heat insulation layer and a second heat insulation layer, the first heat insulation layer is arranged above the first joint side, and the second heat insulation layer is arranged above the second joint side;
the anticorrosive coating comprises a first anticorrosive coating and a second anticorrosive coating, the first anticorrosive coating is arranged above the first heat preservation layer, and the second anticorrosive coating is arranged above the second heat preservation layer.
4. The pipe joint coating anticorrosion repair structure of claim 1, wherein the first structural layer comprises:
the primer layer refers to a common epoxy primer;
the finishing paint layer is a nano silver peroxide epoxy finishing paint prepared by a preset preparation scheme, and the finishing paint layer is coated above the priming paint layer.
5. The pipe joint coating anticorrosion repair structure of claim 1, wherein the second structural layer comprises:
the petrolatum daub is coated at a fourth preset position based on a preset coating scheme, and the coating thickness of the petrolatum daub is 5.0-15.0mm;
the petrolatum area, the petrolatum area twines based on predetermineeing the winding scheme in petrolatum daub top, just, the width of petrolatum area is 10 ± 0.5cm.
6. The pipe joint coating anticorrosion restoration structure of claim 3, wherein the preset prefabricated polyurethane insulation tile is semi-circular, and the inner diameter of the preset prefabricated polyurethane insulation tile is adapted to the target pipe.
7. A microbial corrosion-resistant repair method for a repaired pipe opening, which is used for construction repair of the repaired pipe opening to be repaired into the pipeline repaired opening corrosion-resistant repair structure of claims 1 to 6, and comprises the following steps:
obtaining a target pipeline joint based on the target pipeline;
obtaining a preset preparation scheme, and preparing and obtaining the nano silver peroxide epoxy finish paint based on the preset preparation scheme;
obtaining a common epoxy primer, and forming a first structural layer by taking the common epoxy primer as the primer layer and the nano silver peroxide epoxy finish as the finish layer;
obtaining petrolatum daub and petrolatum belt in sequence;
forming a second structural layer based on the petrolatum daub and the petrolatum belt;
obtaining two preset prefabricated polyurethane heat-insulation tile blocks, and forming a third structural layer based on the two preset prefabricated polyurethane heat-insulation tile blocks;
obtaining a heat shrinkable tape, and taking the heat shrinkable tape as a fourth structural layer;
and sequentially coating the first structural layer, the second structural layer, the third structural layer and the fourth structural layer on the target pipeline joint so as to form the pipeline joint anticorrosion repair structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211557047.9A CN115727224A (en) | 2022-12-06 | 2022-12-06 | Microbial corrosion-resistant repair structure and method for repaired pipe joint |
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| CN202211557047.9A CN115727224A (en) | 2022-12-06 | 2022-12-06 | Microbial corrosion-resistant repair structure and method for repaired pipe joint |
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