Device and method for additive repair in liquid environment

Abstract

The invention discloses a device and a method for additive repair in a liquid environment. The method comprises the following steps: fixing a sound-sensitive material and a composite material thereof in the liquid environment at a position, to be subjected to additive repair, of a base material; the sound-sensitive material in the liquid environment and the composite material thereof are prepared by adding sound-sensitive resin, a filler and an additive for modification. The sound-sensitive material and the composite material thereof in the liquid environment are prepared into a repair layer or a repair block through the sound wave preparation assembly. The invention provides a method for additive repair in a liquid environment, which is characterized in that a sound-sensitive material and a composite material thereof in the liquid environment are formed at a position to be subjected to additive repair of a base material by virtue of a sound wave preparation assembly, so that the problems of short time limit, high material requirement, limited application scene and the like of the current underwater in-situ repair and preparation technology are solved; the coating can be applied to repairing blocks for repairing underwater pipelines and coating of ship waterlines.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece modification or material addition in liquid, and in particular to a device and method for material addition repair in a liquid environment. Background Art

[0002] Metal corrosion, as a permanent challenge in human history, seriously threatens the safety of engineering facilities and causes huge economic losses every year (about 3.0% of global GDP). Unfortunately, metal substrates are subject to adverse external damage (such as cracks, scratches and punctures), which greatly threatens their protective performance and service life, especially for equipment operating in underwater environments, such as ships and drilling platforms. A small area of ​​the unprotected surface is prone to local corrosion, and if not repaired in time, the damaged area will spread to the entire metal surface, causing premature failure of the coating. Unlike pipelines on land, pipelines damaged by corrosion are usually designed for deadweight, working pressure, external pressure and other effects caused by installation. Service and safety issues are more important for installation, inspection and repair, which are large, costly and time-consuming. In addition, the cost and technical challenges of repair and maintenance strategies increase significantly with the increase of operating pressure and pipeline repair location. Once the coating surface is damaged, it is cumbersome and laborious to maintain the coating through traditional repair techniques, and the normal operation of the protected instruments and components will also be affected. After removing the corrosion products on the surface of the metal substrate, it is an ideal method to perform in-situ repair or preparation directly underwater.

[0003] Traditionally, rapid fabrication and repair methods in aqueous environments can be divided into extrinsic self-repairing and intrinsic self-repairing according to the mechanism. For the extrinsic self-repairing area, the microcontainer containing the repair agent will rupture in response to crack propagation in the damaged area and release the repair agent to seal the crack. In order to control the repair process, the curing reaction of the repair agent is mostly triggered by changes in the external environment, including moisture, pH, light, and chloride ions. Unfortunately, the practical application of these repair methods is limited by the complex preparation process and limited repair time. Intrinsic self-repairing is based on a dynamic network of reversible chemical reactions, such as Diels-Alder reaction, disulfide, hydrogen bonding, metal-ligand chelation, and host-probe interaction. However, intrinsic self-repairing requires direct contact of the damaged interface for molecular diffusion, which is not feasible in aqueous environments. Summary of the invention

[0004] The present invention aims to solve at least one of the problems in the related art to a certain extent. To this end, one of the purposes of the present invention is to provide a method for additive repair in a liquid environment, by means of an acoustic wave preparation component, a sound-sensitive material and a composite material thereof in a liquid environment are formed at the position of the substrate to be additively repaired, so as to solve the problems of short time limit, high material requirements, and limited application scenarios of the current underwater in-situ repair and preparation technology, and can be applied to repair blocks for underwater pipeline repair and coating of ship waterline coatings.

[0005] A method for additive repair in a liquid environment, comprising:

[0006] Fixing the sonic-sensitive material and the composite material thereof in a liquid environment at the position of the substrate to be repaired by additives; the sonic-sensitive material and the composite material thereof in a liquid environment include sonic-sensitive resin, fillers and additives;

[0007] Acoustic sensitive materials and their composite materials in liquid environment are prepared by using acoustic wave preparation components.

[0008] Furthermore, the filler includes metal powder or metal oxide powder or fiber.

[0009] Furthermore, the additive includes at least one of graphene oxide, a silane coupling agent, graphene oxide modified by a silane coupling agent, and a wetting agent.

[0010] Furthermore, the sonic sensitive material and its composite material in a liquid environment are fixed at the position of the substrate to be repaired by additives, specifically including: adding nano superparamagnetic γ-Fe3O4 particles to the sonic sensitive material and its composite material in a liquid environment; and applying an external magnetic field to the substrate, and controlling the position of the external magnetic field to fix the sonic sensitive material and its composite material in the liquid environment at the position of the substrate to be repaired by additives.

[0011] Furthermore, the sound-sensitive material and the composite material thereof under liquid environment are fixed at the position of the substrate to be repaired by additive means, specifically comprising: coating the sound-sensitive material and the composite material thereof under liquid environment on a protective film, wherein an adhesive is provided on one side of the protective film coated with the sound-sensitive material and the composite material thereof under liquid environment, and the sound-sensitive material and the composite material thereof under liquid environment and the protective film are adhered to the position of the substrate to be repaired by additive means.

[0012] Furthermore, the protective film is any one of a ceramic sheet, a metal sheet, and a plastic film.

[0013] Furthermore, the acoustic wave preparation component includes an acoustic wave radiation head and a motion control component, and the motion control component drives the acoustic wave radiation head to move along the extension surface of the sound-sensitive material and its composite material in the liquid environment, and drives the acoustic wave radiation head to realize layer-by-layer solidification of the sound-sensitive material and its composite material in the liquid environment.

[0014] A device for additive repair in a liquid environment comprises an acoustic wave preparation component, wherein the acoustic wave preparation component comprises an acoustic wave radiation head and a portable acoustic wave generator; the acoustic wave radiation head is used to prepare acoustic sensitive materials and composite materials thereof in a liquid environment in a substrate to form repair or additive to the substrate; the acoustic sensitive materials and composite materials thereof in a liquid environment comprise acoustic sensitive resins, fillers and additives.

[0015] Furthermore, the sound wave preparation component also includes a motion control component, which is connected to the sound wave radiation head and is used to drive the sound wave radiation head to change its position.

[0016] Further, the fastening assembly includes a magnetron assembly, and the acoustic sensitive material in a liquid environment and the composite material thereof include nano superparamagnetic γ-Fe3O4 particles;

[0017] Alternatively, the fastening assembly includes a protective film with adhesive.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method for additive repair in a liquid environment of the present application includes: fixing the sonic sensitive material and its composite material in a liquid environment at the position of the substrate to be repaired by additives; the sonic sensitive material and its composite material in a liquid environment include sonic sensitive resin, filler and additives; and preparing a repair layer or repair block for the sonic sensitive material and its composite material in a liquid environment through an acoustic wave preparation component. The acoustic wave preparation component uses acoustic waves to prepare the repair layer or repair block. The acoustic waves have a small attenuation in water, which can ensure that energy loss is reduced during the additive repair process, and can realize underwater in-situ additive repair without disassembling and damaging the substrate, thereby improving the repair efficiency.

[0019] The device for additive repair in a liquid environment provided by the present application includes a sonic preparation component, the sonic preparation component includes a sonic radiation head, and the sonic sensitive material and its composite material in the liquid environment are fixed to the position of the substrate to be repaired by additives through a fastening component; the sonic radiation head is used to prepare the sonic sensitive material and its composite material in the liquid environment into a repair layer or a repair block in the substrate to form a repair or additive to the substrate; the sonic sensitive material and its composite material in the liquid environment include sonic sensitive resin, filler and additives. The present application can break through the limitations of the complex external self-repair preparation process and the limited repair time, as well as the limitation of the difficulty of direct contact with the damaged interface for molecular diffusion in the internal self-repair, to achieve a fast and efficient in-situ repair or additive of the coating in an aqueous environment, so as to solve the problems of short time limit, high material requirements, and limited application scenarios of the current underwater in-situ repair and preparation technology, and can be applied to the repair and additive of underwater substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] In the attached figure:

[0023] Figure 1 A schematic diagram of the process of additive repair in a liquid environment used in this application;

[0024] Figure 2 Schematic diagram of the process of nanoparticles modified by silane coupling agent;

[0025] Figure 3 A schematic diagram of a sound-sensitive material and a composite material thereof in a liquid environment after adding fiber fillers and particle reinforcement;

[0026] Figure 4 This is a schematic diagram of the device for additive repair in a liquid environment used in this application;

[0027] Figure 5 Schematic diagram of rapid preparation of acrylic composite coating by sound waves in a water environment in Example 3;

[0028] Figure 6 This is a schematic diagram of the results of pipeline repair using carbon fiber acrylate composite resin in Example 4;

[0029] Figure numbers: 1. Substrate; 2. Pollutants; 3. Corrosion pits; 4. Sound-sensitive materials and composite materials in liquid environment; 5. Sound wave radiation head; 6. Protective film; 7. Magnetron assembly; 8. Repair layer; 9. Sealed waterproof cavity; 10. Portable sound wave generator; 11. Water environment. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the mechanism or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0031] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, mechanisms, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0033] Example 1

[0034] See also Figure 1 The present application provides a method for additive repair in a liquid environment, comprising:

[0035] S0: Substrate pretreatment process, that is, before repairing or adding material to the substrate, the surface of the substrate is first polished and decontaminated, which helps to improve the bonding strength between the acoustic sensitive material and its composite material and the substrate in a liquid environment.

[0036] Specifically, general mechanical roughening methods (sandblasting, cutting, grinding), water jet or hydraulic jet methods, as well as chemical treatment, mechanical grinding or mechanical grinding combined with chemical reagents can be used to increase the surface roughness, thereby increasing the adhesion between the substrate and the coating.

[0037] S1: fixing the acoustic sensitive material and the composite material thereof in a liquid environment at the position of the substrate to be repaired by additives; the acoustic sensitive material and the composite material thereof in a liquid environment include acoustic sensitive resin, filler and additives;

[0038] In the present application, the acoustic sensitive material in liquid environment and the composite material thereof include acoustic sensitive resin, filler and additive, wherein the acoustic sensitive resin includes but is not limited to: acrylate, epoxy resin, methyl acrylate, methyl methacrylate or polydimethylsiloxane. The filler includes metal powder or metal oxide powder or fiber, and the additive includes at least one of graphene oxide, silane coupling agent, graphene oxide modified by silane coupling agent, and wetting agent.

[0039] The various components in the acoustic sensitive material and its composite material in a liquid environment can also work synergistically, for example, when the acoustic sensitive resin is acrylate, when the additive is a silane coupling agent and a wetting agent, and the filler is nano-Fe3O4 particles. Figure 2 As shown, the underwater adhesive acrylate material is modified by a silane coupling agent, changing its hydrophilicity to hydrophobicity; the underwater acoustic composite material is prepared by configuring nano-Fe3O4 particles to enhance the toughness and adhesion of the material, and a strong bond can be formed between the adhesive and the substrate through viscous locking; by adding a wetting agent to the acoustic sensitive material and its composite material in a liquid environment, the surface tension of the system is reduced, and the substrate surface is better wetted and the gaps are penetrated.

[0040] It should be noted that when adding additives and fillers to the acoustic sensitive resin during configuration, mechanical stirring and mixing are required for at least 20 minutes to ensure uniform mixing. The added additives, namely silane coupling agents and wetting agents, only account for 3-5wt% of the acoustic sensitive material and its composite material in a liquid environment; the added fillers can enhance the toughness of the material, fill the pores generated by cavitation of the acoustically prepared material, and enhance the mechanical strength of the prepared coating, accounting for 10-30wt% of the acoustic sensitive material and its composite material in a liquid environment.

[0041] In actual operation, the filler can be metal powder or fiber, wherein the metal powder can be iron powder, aluminum powder, etc. Preferably, the iron powder and aluminum powder are nanometer-level powders, which can be used for underwater pipeline corrosion pit repair and enhance the mechanical strength and adhesion strength of the acoustic sensitive material and its composite material in the liquid environment after curing. Figure 3 As shown, when the filler is fiber, similar to nano-scale metal powder, the acoustic sensitive resin to which fiber or nano-scale metal powder is added, the filler can fill the gaps in the acoustic sensitive resin and improve the density of the acoustic sensitive resin, thereby making the acoustic sensitive material and its composite material have an enhanced and toughened effect in a liquid environment.

[0042] The additive in the present application can also be graphene oxide or graphene oxide modified by a silane coupling agent, wherein low concentration of graphene oxide added to the acoustic sensitive material and its composite material in a liquid environment can enhance the mechanical strength and barrier properties of the acoustic sensitive material and its composite material in a liquid environment and its cured layer, making it have an anti-corrosion effect. The graphene oxide modified by a silane coupling agent can be better compounded with the filler to avoid graphene oxide agglomeration, and at the same time make the acoustic sensitive material and its composite material in a liquid environment and its cured layer have a better anti-corrosion effect.

[0043] The method of the present application can be applied to the repair of corrosion pits on the surface of underwater substrates, or to the additive coating of the surface of underwater substrates, or to first repair the corrosion pits on the surface of underwater substrates, and then form a coating on the outside of the corrosion pits. When the substrate is first repaired and then a coating is formed on the repair layer, the acoustic sensitive resin used in the repair and coating formation process is preferably the same type of acoustic sensitive resin. This is because in the process of repairing or additive coating, the acoustic sensitive material and its composite material in a liquid environment are not formed in one go, but need to be coated and cured multiple times to finally form a complete repair layer and coating, that is, the repair and additive process is implemented layer by layer. The present application ensures that the type of acoustic sensitive resin is consistent, which can increase the interaction force between adjacent layers of acoustic sensitive materials and their composite materials in a liquid environment, and can solve the problem of insufficient interlayer bonding caused by stratification due to different repair materials in the pipeline repair system.

[0044] It should be noted that when the configured sound-sensitive materials and composite materials under liquid environment and their composite materials are fixed on the surface of the substrate to be repaired or added, the configured sound-sensitive materials and composite materials under liquid environment are applied by brushing or scraping, and the squeezing effect of the hard-bristle brush is used to displace the water on the surface of the substrate and the corrosion pits, so that the sound-sensitive materials and composite materials under liquid environment are evenly smeared on the substrate immersed in the water environment.

[0045] In this application, the acoustic sensitive material and the composite material thereof in a liquid environment are fixed at the position of the substrate to be repaired by additives, which can be achieved by the following two methods: the first one is:

[0046] Nano-superparamagnetic γ-Fe3O4 particles are added to sonic-sensitive materials and their composite materials in a liquid environment, and the optimal addition rate of nano-superparamagnetic γ-Fe3O4 particles is about 1wt%; an external magnetic field is applied to the substrate, and the sonic-sensitive materials and their composite materials in the liquid environment are fixed at the position of the substrate to be repaired by controlling the position of the external magnetic field.

[0047] Superparamagnetism is manifested as an "S-shaped" curve on the hysteresis loop, that is, when an external magnetic field exists, the particles show strong magnetism and aggregate, and when the magnetic field is removed, the magnetism disappears immediately and is redispersed into the system. By utilizing the targeted driving mechanism of nano-γ-Fe3O4 particles and applying a uniform magnetic field on the surface plane of the substrate, the sonic sensitive materials and their composite materials in a liquid environment can be controlled to adsorb on the surface of the substrate, and the formation of penetration channels parallel to the coating direction can be prevented. The nano-superparamagnetic γFe3O4 particles added to the sonic sensitive materials and their composite materials in a liquid environment are uniformly dispersed in the sonic sensitive materials and their composite materials in a liquid environment, so that the sonic sensitive materials and their composite materials in a liquid environment have the ability to be controlled by an external magnetic field.

[0048] In this embodiment, an external magnetic field is required. The external magnetic field can be a magnet or other magnetic control components in the prior art. It is necessary to ensure that the magnetic field is applied to the corrosion pits on the surface of the substrate waiting to be repaired. In this way, the targeted driving mechanism of nano γ-Fe3O4 particles can be used to control the acoustic sensitive materials and composite materials containing nano γ-Fe3O4 particles in a liquid environment to be adsorbed at the corrosion pits.

[0049] The second method: coating the sound-sensitive material and its composite material in a liquid environment on a protective film, wherein an adhesive is provided on one side of the protective film coated with the sound-sensitive material and its composite material in a liquid environment, and the sound-sensitive material and its composite material in a liquid environment and the protective film are attached to the position of the substrate to be repaired by additive manufacturing through the adhesive.

[0050] The prepared sound-sensitive materials and composite materials in liquid environment are evenly applied on the surface of aluminum foil film. The surface of aluminum foil film is provided with adhesive, which is equivalent to the form of "double-sided tape". The sound-sensitive materials and composite materials in liquid environment are applied to the surface of substrate through aluminum foil film, so that the water on the interface of substrate is squeezed out, and the underwater flow of sound-prepared coating materials is restricted by single-sided adhesive aluminum foil film. Since aluminum material has a good sound wave conduction coefficient, thinner aluminum foil will not only not hinder sound wave conduction, but also solve the problem of uneven preparation of sound preparation materials caused by underwater sound wave vibration.

[0051] In actual operation, the protective film can include various protective films that do not hinder the conduction of sound waves in addition to the aluminum foil film. For example, the hard protective film can be made of ordinary ceramic sheets, steel sheets or metal sheets, and the soft protective film can be made of plastic materials with an acoustic impedance between the acoustic impedance of the chip material and the acoustic impedance of the coupling medium. The use of the soft protective film can also improve the contact coupling effect with the coating material, so that the soft protective film does not hinder the propagation of sound waves, which is helpful for the preparation of sound-sensitive materials and their composite materials in liquid environments.

[0052] S2: Prepare a repair layer or repair block for the sound-sensitive material and its composite material in a liquid environment through an acoustic wave preparation component.

[0053] The acoustic wave preparation component includes an acoustic wave radiation head, a portable acoustic wave generator and a motion control part, wherein the portable acoustic wave generator is connected to the acoustic wave radiation head, wherein the portable acoustic wave generator is used to transmit the generated sound waves to the acoustic wave radiation head. The shape of the working end of the acoustic wave radiation head includes but is not limited to: a pointed head, a flat head, a concave head, a convex head and the like. The distance position of the acoustic wave focus can be changed by changing the shape of the working end of the acoustic wave radiation head, so that the acoustic wave radiation head and the prepared material can be contacted and prepared indirectly. The acoustic wave radiation head can directly contact the sound-sensitive material and its composite material through a flat head or a convex head low-frequency focused acoustic wave radiation head; the acoustic wave radiation head can also be indirectly contacted with the sound-sensitive material and its composite material through various protective films for sound wave conduction through a concave head low-frequency focused acoustic wave radiation head, and the sound wave radiation head can be indirectly prepared; the acoustic wave radiation head can also be non-contacted through a high-frequency focused acoustic wave radiation head. The focal distance of the high-frequency focused acoustic wave radiation head is large, so that the radiation head can be prepared without contacting the sound-sensitive material, its composite material and protective film in a liquid environment.

[0054] The motion control part drives the acoustic wave radiation head to move along the extension surface of the acoustic sensitive material and the composite material thereof in the liquid environment, and drives the acoustic wave radiation head to realize the layer-by-layer preparation of the acoustic sensitive material and the composite material thereof in the liquid environment. The motion control part can be controlled by programming, and it can drive the acoustic wave radiation head to move in a plane along with the same repair layer, and can also drive the acoustic wave radiation head to move upward along with the rise of different repair layers, so as to realize multi-layer coating.

[0055] The sound wave radiation head is connected to the portable sound wave generator through a waterproof wire, and the wire interface section of the sound wave radiation head is arranged in the sealed watertight cavity 9. The sound wave radiation head can be handheld or clamped with a motion control part for control operation. When working underwater, the portable sound wave generator is designed as a hand-held portable equipment for easy construction.

[0056] When preparing the repair layer, the motion control part is used to drive the acoustic radiation head downward until the focus of the acoustic radiation head is a layer thickness (0.17-0.33mm) away from the composite material to be prepared in the underwater substrate, leaving space for rapid preparation to ensure that the prepared repair layer can be deposited on the metal substrate.

[0057] Then turn on the power, turn on the portable sound wave generator, adjust the sound wave power and other parameters to control the amplitude of the sound wave radiation head. The sound wave radiation head can fix the frequency at a resonant frequency between 20-100kHz according to the design parameters, and the unilateral amplitude of the sound wave radiation head is controlled within the range of 3-50um. After completing the preparation of a single layer, the motion control part controls the sound wave amplitude rod to move 10cm upward away from the substrate. After adding the sound-sensitive material and its composite material in a liquid environment, move the focus of the sound wave radiation head to a layer thickness (0.17-0.33mm) away from the prepared single-layer coating to prepare for the preparation of the next layer. Repeat this step until the printing is completed, prepare multiple repair layers, fill the corrosion pits, or add materials to form a coating on the surface of the substrate.

[0058] The liquid environment in the present application includes an underwater environment or an aquatic environment with relatively high humidity.

[0059] In the present application, the motion control component stores the motion parameters of the acoustic wave radiation head, and the motion parameters of the acoustic wave radiation head include but are not limited to the moving path, moving speed, feed and dwell time of the acoustic wave radiation head.

[0060] The present application is to prepare underwater repair blocks or coatings by direct action of sound waves, using the physical, chemical and mechanical composite action produced by sound waves. Since the application of underwater ultraviolet curing is a complicated process, light will be refracted and reflected underwater to attenuate its energy, while sound waves have little attenuation underwater. Therefore, this method is simpler and reduces energy loss compared to traditional repair methods that use changes in light sources to trigger the curing reaction of the repair agent.

[0061] During the construction of this application, there is no need to dismantle damaged parts, and operations can be carried out directly in an underwater environment. It can be used to repair local damaged points of underwater pipelines, prepare underwater ship bottom coatings, etc.

[0062] Example 2

[0063] like Figure 1 and Figure 4 As shown, the present application provides a device for additive repair in a liquid environment, including an acoustic wave preparation component, wherein the acoustic wave preparation component includes an acoustic wave radiation head 5, and a sound-sensitive material and a composite material 4 thereof in a liquid environment are fixed to a substrate 1 at a position to be repaired by additives through a fastening component; the acoustic wave radiation head 5 is used to solidify the sound-sensitive material and a composite material 4 thereof in a liquid environment in the substrate 1 to form a repair or additive to the substrate 1; the sound-sensitive material and a composite material 4 thereof in a liquid environment include acoustic-sensitive resins, fillers and additives.

[0064] like Figure 4As shown, the acoustic wave preparation component includes an acoustic wave radiation head 5, a portable acoustic wave generator 10 and a motion control part, wherein the portable acoustic wave generator 10 is connected to the acoustic wave radiation head 5, wherein the portable acoustic wave generator 10 is used to transmit the generated acoustic wave to the acoustic wave radiation head 5. The motion control part drives the acoustic wave radiation head 5 to move along the extension surface of the acoustic sensitive material and the composite material 4 thereof in the liquid environment, and drives the acoustic wave radiation head 5 to realize the layer-by-layer preparation of the acoustic sensitive material and the composite material 4 thereof in the liquid environment. The motion control part can be controlled by programming, which can drive the acoustic wave radiation head 5 to move in a plane along with the same layer of repair layer 8, and can also drive the acoustic wave radiation head 5 to move upward along with the rise of different layers of repair layers 8, so as to realize multi-layer coating.

[0065] The acoustic wave radiation head 5 is connected to the portable acoustic wave generator 10 through a waterproof wire, and the wire interface section of the acoustic wave radiation head 5 is arranged in a closed watertight cavity 9. The acoustic wave radiation head 5 can be handheld or clamped with a motion control part for control operation. When working underwater, the portable acoustic wave generator 10 can be carried by hand or in a backpack near the substrate to be prepared or repaired in the water environment 11, which is convenient for construction.

[0066] In the present application, the fastening assembly includes a magnetron assembly 7, and the acoustic sensitive material and the composite material thereof 4 in the liquid environment include nano superparamagnetic γ-Fe3O4 particles. That is to say, nano superparamagnetic γ-Fe3O4 particles are added to the acoustic sensitive material and the composite material thereof 4 in the liquid environment; and the magnetron assembly 7 is arranged at the substrate 1, and the position of the magnetron assembly 7 is controlled to fix the acoustic sensitive material and the composite material thereof 4 in the liquid environment at the position of the substrate 1 to be repaired by additive.

[0067] Superparamagnetism is manifested as an "S-shaped" curve on the hysteresis loop, that is, when the external magnetic field exists, the particles show strong magnetism and aggregate, and when the magnetic field is removed, the magnetism disappears immediately and redisperses into the system. By using the targeted driving mechanism of nano-γFe3O4 particles and applying a uniform magnetic field on the surface plane of the substrate 1, the acoustic sensitive material and its composite material 4 can be controlled to be adsorbed on the surface of the substrate 1 in a liquid environment, which can prevent the formation of permeation channels parallel to the coating direction.

[0068] As another specific embodiment, the fastening assembly includes a protective film 6 with adhesive. The acoustic sensitive material and the composite material thereof 4 in a liquid environment are coated on the protective film 6, and the adhesive is provided on one side of the protective film 6 coating the acoustic sensitive material and the composite material thereof 4 in a liquid environment, and the acoustic sensitive material and the composite material thereof 4 in a liquid environment and the protective film 6 are attached to the position of the substrate 1 to be repaired by additive by the adhesive.

[0069] The configured sound-sensitive material and its composite material 4 in a liquid environment are evenly applied to the surface of the aluminum foil film, and the surface of the aluminum foil film is provided with adhesive, which is equivalent to the form of "double-sided tape". The sound-sensitive material and its composite material 4 in a liquid environment are applied to the surface of the substrate through the aluminum foil film, so that the water on the interface of the substrate is squeezed out, and the underwater flow of the sound-prepared coating material is restricted by the single-sided adhesive aluminum foil film. Since the sound wave conduction coefficient of aluminum material is good, the thinner aluminum foil will not only not hinder the sound wave conduction, but also solve the problem of uneven preparation of the sound preparation material due to underwater sound wave vibration.

[0070] like Figure 1 As shown, the pollutants 2 in the corrosion pits 3 on the surface of the substrate 1 are first removed, and then the acoustic sensitive material and the composite material 4 under the liquid environment are added to the corrosion pits 3. At this time, the acoustic sensitive material and the composite material 4 under the liquid environment can be adhered to the corrosion pits 3 through the protective film 6, and the acoustic sensitive material and the composite material 4 under the liquid environment can also be adhered to the corrosion pits 3 through the magnetic control component 7. The acoustic wave radiation head 5 is driven downward by the motion control part until the focus of the acoustic wave radiation head 5 is a layer thickness (0.17-0.33mm) away from the composite material to be prepared filled in the underwater substrate, leaving space for rapid preparation to ensure that the prepared repair layer 8 can be deposited on the metal substrate.

[0071] Then turn on the power, turn on the portable sound wave generator 10, adjust the sound wave power and other parameters to control the amplitude of the sound wave radiation head 5. The sound wave radiation head 5 can fix the frequency at a resonant frequency in the range of 20-100kHz according to the design parameters, and the unilateral amplitude of the sound wave radiation head 5 is controlled in the range of 3-50um. After completing the single-layer preparation, the motion control part controls the sound wave amplitude rod to move 10cm upward away from the substrate. After adding the sound-sensitive material and its composite material 4 in a liquid environment, move the focus of the sound wave radiation head 5 to a distance of a layer thickness (0.17-0.33mm) from the prepared single-layer coating to prepare for the preparation of the next layer. Repeat this step until the printing is completed, and prepare a multi-layer repair layer 8 to fill the corrosion pit 3, or to form a coating by adding material on the surface of the substrate 1.

[0072] The device of the present application can realize interlayer connection between heterogeneous materials; realize acoustic repair of metal and non-metallic pipes, and replace the current conventional stereo forming energy source (laser, heat, electron beam, etc.), with low cost, safety and reliability, energy saving and environmental protection, easy operation, high efficiency and good quality. The present application can not only overcome the difficulties of large installation weight of semi-shell metal repair sleeves and large technical difficulties in connecting split sleeves, but also has the advantages of wide application of wet laying, which can be applied to straight pipes as well as corners and bends of pipes. The present application can realize underwater in-situ manufacturing and repair, and there is no need to disassemble damaged parts during construction, and operations can be carried out directly in an underwater environment. The added nano-γ-Fe3O4 particles have the characteristics of target drive and competitive wetting functions, which can effectively prevent the formation of penetrating microchannels, improve the adhesion strength of organic binders to base metals, and realize underwater in-situ manufacturing through the regulation of sound waves and magnetic fields. The present application can solve the problem of uneven preparation of acoustic preparation materials caused by underwater acoustic wave vibrations, and improve the preparation quality.

[0073] Example 3

[0074] like Figure 5 As shown, this embodiment provides a method for coating an iron plate substrate 1 in a water environment 11, comprising:

[0075] S1: Surface pretreatment is performed on the 20×20mm iron plate substrate 1. The surface treatment quality of the metal substrate 1 is the most important factor in ensuring the protective performance of the coating. The corrosion on the iron block is removed by grinding with a power tool, and the iron plate is cleaned by spraying high-pressure water.

[0076] S2: Prepare the acoustic sensitive material and its composite material 4 in liquid environment, wherein the acoustic sensitive material and its composite material 4 in liquid environment include 3wt% nano superparamagnetic γ-Fe3O4 particles, 3wt% silane coupling agent, and 94wt% epoxy resin. Add 3wt% nano superparamagnetic γ-Fe3O4 particles to the epoxy resin to make the acoustic sensitive material and its composite material 4 in liquid environment magnetic; add 3wt% KH550 silane coupling agent to improve the wettability and dispersibility of the nano superparamagnetic γ-Fe3O4 particles in the acoustic sensitive material and its composite material 4 in liquid environment, and improve the adhesion to glass, aluminum, and iron metals. After adding the nano superparamagnetic γ-Fe3O4 particles and the silane coupling agent to the epoxy resin, use an electric stirring rod to stir for 1-2 minutes to mix the materials evenly.

[0077] S3: Apply the configured liquid environment sonic sensitive material and its composite material 4 by brushing, and use the squeezing effect of the bristle brush to displace the water on the surface of the substrate 1, so that the liquid environment sonic sensitive material and its composite material 4 are evenly smeared on the iron plate immersed in the water environment 11, and use the magnetic control component 7 to control the liquid environment sonic sensitive material and its composite material 4 to better adhere to the iron plate.

[0078] S4: The sound wave radiation head 5 is connected to the portable sound wave generator 10 through a waterproof wire, and the wire interface section of the sound wave radiation head 5 is arranged in the sealed watertight cavity 9. Turn on the power switch of the portable sound wave generator 10, and the sound wave radiation head 5 operates under the control of the motion control component.

[0079] S5: After the configured liquid environment acoustic sensitive material and composite material thereof 4 are flattened onto the pre-treated iron plate, the liquid environment acoustic sensitive material and composite material thereof 4 are modified by adding superparamagnetic γ-Fe3O4 particles. The magnetic control component 7 can control the liquid environment acoustic sensitive material and composite material thereof 4 to adhere better to the iron plate.

[0080] S6: The motion control part drives the acoustic radiation head 5 to move downward until the focus of the acoustic radiation head 5 is at a layer thickness (0.17-0.33mm) distance from the sound-sensitive material and its composite material 4 in the liquid environment to be prepared filled on the iron plate, leaving space for rapid preparation to ensure that the prepared coating can be deposited on the iron plate.

[0081] S7: Turn on the power, turn on the portable sound wave generator 10, adjust the sound wave power and other parameters, so as to control the amplitude of the sound wave radiation head 5. The sound wave radiation head 5 can fix the frequency at a resonant frequency in the range of 20-100kHz according to the design parameters, and the single-sided amplitude of the sound wave radiation head 5 is controlled in the range of 3-50um.

[0082] S8: After the single-layer coating is prepared, the motion control part controls the acoustic wave horn to move upward 10 cm away from the substrate, and at the same time, the acoustic sensitive material and its composite material 4 in the liquid environment are applied flat on the prepared coating again by brushing or scraping, and the magnetic control component 7 is moved upward to adjust, and the focus of the moving acoustic wave radiation head 5 is a layer thickness (0.17-0.33 mm) away from the prepared single-layer coating, in preparation for the preparation of the next layer. Repeat this step until the printing is completed, prepare multiple layers of coating, and form a coating of preset thickness.

[0083] Example 3

[0084] This embodiment provides a method for repairing corrosion pits 3 on a substrate in an aqueous environment 11, comprising:

[0085] S1: Prepare the acoustic sensitive material and its composite material 4 in liquid environment to fill and repair the corrosion pit 3.

[0086] 30 g of aluminum powder was weighed and mixed with 70 g of acrylate to prepare 100 g of the acoustic sensitive material and its composite material 4 in a liquid environment. After being fully stirred with an electric stirrer, the material was vacuumed using a pressure device in a constant temperature box. Adding aluminum powder material can enhance the toughness and adhesion of the underwater composite material.

[0087] S2: Use sound waves to conduct preliminary experiments on the configured sound-sensitive materials and their composite materials 4 in the liquid environment, select the internal high-frequency focused radiation head, and during preparation, only need to adjust the focus to be located in the corrosion pit 3 for preparation, to ensure that the sound wave radiation head is not in direct contact with the sound-sensitive materials and their composite materials in the liquid environment, but the sound waves of the sound wave radiation head can directly act on the sound-sensitive materials and their composite materials in the liquid environment; thus, the sound wave radiation head 5 can perform the filling preparation experiment without going deep into the pipeline corrosion pit 3 or even contacting the corrosion pit 3.

[0088] S3: Connect the portable sound wave generator 10 to the sound wave radiation head 5, turn on the portable sound wave generator 10, and allow the sound waves to directly act on the sound-sensitive material and its composite material 4 in the liquid environment. The sound wave frequency is adjusted within a resonant frequency range of 20-100kHz, and the unilateral amplitude of the sound wave radiation head 5 is adjusted within the range of 3-50. The molding efficiency and molding effect of the sound-sensitive material and its composite material 4 in the liquid environment are analyzed, and the most suitable preparation parameters of the sound-sensitive material and its composite material 4 in the liquid environment are selected.

[0089] S4: Pre-set the preparation route of the target corrosion pit 3 filler at the working end of the acoustic wave radiation head 5, import it into the numerical control analysis software, obtain the motion trajectory program of the acoustic wave radiation head 5, and input the file into the motion control part.

[0090] S5: Associating the sound wave radiation head 5 with the motion control component, so that the focus of the sound wave radiation head 5 can move according to a preset motion trajectory program.

[0091] S6: using mechanical grinding combined with high-pressure water gun flushing to treat the corrosion damage of the substrate 1 in the water environment 11, and performing surface treatment on the corrosion pits 3 of the pipeline by sandblasting;

[0092] S7: Apply the configured liquid environment sonic material and its composite material 4 by brushing, and use the squeezing effect of the bristle brush to squeeze out the water on the surface of the substrate 1 and the corrosion pit 3, and fill the configured liquid environment sonic material and its composite material 4 into the corrosion pit 3 after pretreatment. Then evenly apply the configured liquid environment sonic material and its composite material 4 on the surface of the aluminum foil film, and the aluminum foil film surface is provided with adhesive, and the liquid environment sonic material and its composite material 4 is pasted in the corrosion pit 3 by the adhesive, and a high-frequency focused acoustic wave horn is used, and the acoustic wave radiation head 5 is prepared by indirectly interacting with the liquid environment sonic material and its composite material 4 through the aluminum foil film.

[0093] S8: The motion control component controls the high-frequency focused acoustic wave radiation head 5 to move downward until the focal point of the acoustic wave radiation head 5 is a layer thickness away from the composite material to be prepared filled in the corrosion pit 3 of the underwater substrate, thereby determining the initial plane of the corrosion pit 3 filler prepared this time.

[0094] S9: Turn on the power of the portable sound wave generator 10, adjust the sound wave parameters to the most suitable preparation parameters debugged in the first step, start the motion module, and the focus of the sound wave radiation head 5 moves with the movement of the motion module. While moving, start preparing the corrosion pit 3 filler. Under the action of the sound wave, prepare the sound sensitive material and its composite material 4 in the liquid environment to form a filling layer.

[0095] After the corrosion pit 3 and the repair layer 8 on the surface are filled, the filled area can be polished and trimmed by mechanical grinding to make it flush with the metal structure surface of the pipeline. Figure 6 shown.

[0096] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A method for additive repair in a liquid environment, characterized in that: include: Fixing the sonic-sensitive material and the composite material thereof in a liquid environment at the position of the substrate to be repaired by additives; the sonic-sensitive material and the composite material thereof in a liquid environment are composed of a sonic-sensitive resin, a filler and an additive; By using acoustic wave preparation components, repair layers or repair blocks are prepared for sound-sensitive materials and their composite materials in a liquid environment.

2. The method for additive repair in a liquid environment according to claim 1, characterized in that: The additive includes at least one of graphene oxide, a silane coupling agent, graphene oxide modified by a silane coupling agent, and a wetting agent.

3. The method for additive repair in a liquid environment according to claim 1, characterized in that: The filler includes metal powder or metal oxide powder or fiber.

4. The method for additive repair in a liquid environment according to claim 1, characterized in that: The sonic sensitive material and its composite material in a liquid environment are fixed at the position of the substrate to be repaired by additives, specifically including: adding nano superparamagnetic γ-Fe3O4 particles to the sonic sensitive material and its composite material in a liquid environment; and applying an external magnetic field to the substrate, and controlling the position of the external magnetic field to fix the sonic sensitive material and its composite material in the liquid environment at the position of the substrate to be repaired by additives.

5. The method for additive repair in a liquid environment according to claim 1, characterized in that: The sound-sensitive material and the composite material thereof under liquid environment are fixed at the position of the substrate to be repaired by additive material, specifically comprising: coating the sound-sensitive material and the composite material thereof under liquid environment on a protective film, wherein an adhesive is arranged on one side of the protective film coated with the sound-sensitive material and the composite material thereof under liquid environment, and the sound-sensitive material and the composite material thereof under liquid environment and the protective film are adhered to the position of the substrate to be repaired by additive material through the adhesive.

6. The method for additive repair in a liquid environment according to claim 5, characterized in that: The protective film is any one of a ceramic sheet, a metal sheet, and a plastic film.

7. The method for additive repair in a liquid environment according to claim 1, characterized in that: The acoustic wave preparation component includes an acoustic wave radiation head and a motion control component. The motion control component drives the acoustic wave radiation head to move along the extension surface of the sound-sensitive material and its composite material in the liquid environment, and drives the acoustic wave radiation head to realize layer-by-layer preparation of the sound-sensitive material and its composite material in the liquid environment.

8. A device for additive repair in a liquid environment, characterized in that: It comprises an acoustic wave preparation component, which comprises an acoustic wave radiation head. The acoustic sensitive material and the composite material thereof in a liquid environment are fixed to the position of the substrate to be repaired by additives through a fastening component; the acoustic wave radiation head is used to prepare the acoustic sensitive material and the composite material thereof in a liquid environment in the substrate to form a repair or additive to the substrate; the acoustic sensitive material and the composite material thereof in a liquid environment comprise an acoustic sensitive resin and a filler.

9. The device for additive repair in a liquid environment according to claim 8, characterized in that: The sound wave preparation component also includes a motion control component, which is connected to the sound wave radiation head and is used to drive the sound wave radiation head to change its position.

10. The device for additive repair in a liquid environment according to claim 8, characterized in that: The fastening assembly includes a magnetron assembly, and the acoustic sensitive material in a liquid environment and the composite material thereof include nano superparamagnetic γ-Fe3O4 particles; Alternatively, the fastening assembly includes a protective film with adhesive.

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