Magnetic control bonding material, synthesis method and emergency under-pressure plugging method of magnetic control bonding material

Abstract

The invention provides a magnetic control bonding material, a synthesis method and an under-pressure plugging method of the magnetic control bonding material. The magnetic control bonding material is mainly synthesized from the following raw materials in parts by mass: 23.7 to 60 parts of surface modified metal powder, 0.5 to 2.5 parts of a photoacid generator, 0.1 to 3.0 parts of a thermal initiator, 0.1 to 0.8 part of a dispersing agent, 1.0 to 5.0 parts of an accelerant and the balance of two or more than two kinds of mutually soluble resin, after being initiated by ultraviolet light, the magnetic control bonding material has the capability of forming a stable and continuous deep polymerization reaction. At least two or more mutually soluble resin compounds are used as carrier liquid, a photoacid generator and a thermal initiator are added, so that the magnetic control bonding material has rapid deep photocuring performance, and the synthesized magnetic control bonding material has structural self-adaption and adhesion capabilities under a specific magnetic field, has high bonding strength, and is suitable for large-scale production. When in use, the plugging agent can adapt to a leakage structure, is tightly attached, is quickly cured and bonded so as to resist leakage pressure, and is matched with a specific under-pressure plugging method to realize leakage emergency under-pressure plugging of ferromagnetic pipelines and pressure containers.

Description

Technical Field

[0001] The present application relates to the technical field of plugging materials, and in particular to a magnetically controlled adhesive material, a synthesis method and an emergency pressure plugging method thereof. Background Art

[0002] Leakage of flammable, explosive, toxic, and hazardous fluids during production, storage, and transportation poses a serious threat to the ecological environment, industry, and public safety. Leakages in oil pipelines and hazardous chemical storage tanks, for example, pose a serious threat to the ecological environment, industry, and public safety. Because the probability of secondary accidents such as fire, explosion, and poisoning, as well as the scope of a leak, are positively correlated with the duration of the leak, timely and effective emergency pressure sealing is crucial for preventing secondary accidents and mitigating their consequences.

[0003] However, existing emergency plugging methods have low success rates, limited operating conditions, and are difficult to effectively control leaks, and may even endanger the lives of operators. Therefore, it is very necessary to provide a new plugging material and plugging method. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a magnetic control adhesive material, a synthesis method and an emergency pressure sealing method thereof.

[0005] Based on the above-mentioned purpose, the present application provides a magnetron bonding material, which is mainly synthesized from the following raw materials in parts by mass: 23.7 to 60 parts of surface-modified metal powder, 0.5 to 2.5 parts of photoacid generator, 0.1 to 3.0 parts of thermal initiator, 0.1 to 0.8 parts of dispersant, 1.0 to 5.0 parts of promoter, and the rest are two or more mutually soluble resins; after ultraviolet light initiation, the magnetron bonding material has the ability to form a stable and continuous deep polymerization reaction.

[0006] In some embodiments, the metal powder in the surface-modified metal powder is selected from at least one of nano-iron powder, nano-nickel powder, nano-nickel oxide, nano-iron oxide, nano-cobalt powder, and nano-carbonyl iron powder; the surface modification type of the surface-modified metal powder is one or more of amino surface modification, epoxidation surface modification, thiol surface modification, and olefination surface modification.

[0007] In some embodiments, the two or more mutually soluble resins are selected from at least two of epoxy resins, polyketone resins, fluorocarbon resins, acrylic resins, polyurethanes, alkyd resins, and phenolic resins.

[0008] In some embodiments, the at least two mutually soluble resins are epoxy resin and acrylic resin.

[0009] In some embodiments, the photoacid generator is one or more of triaryl sulfonium hexafluorophosphate, diaryl iodonium hexafluoroantimonate, and hexaaryldiimidazole; the thermal initiator is benzopinacol; the dispersant is at least one of fatty alcohol polyoxyethylene ether, Span80, lauramide betaine, sodium dodecylbenzenesulfonate, and sodium secondary alkylsulfonate; and the accelerator is at least one of 2,4,6-tris(dimethylaminomethyl)phenol, N-(4-chlorophenyl)-N',N'-dimethylurea, diethylenetriamine, and ethylene glycol diglycidyl ether.

[0010] In some embodiments, 0.1 to 0.5 parts of an adhesion promoter are further included; wherein the adhesion promoter is one or more of γ-glycidyloxypropyltrimethoxysilane, vinyltriethoxysilane, and γ-methacrylatepropyltrimethoxysilane.

[0011] The present application also provides a method for preparing the aforementioned magnetron bonding material, comprising:

[0012] At least two or more mutually soluble resins, a dispersant, a promoter, and a surface-modified metal powder are mechanically stirred and ultrasonically vibrated at 30-70° C. until fully mixed to obtain a mixed system; a photoacid generator and a thermal initiator are dissolved in dichloromethane, added to the mixed system, mechanically stirred and ultrasonically vibrated at 30-60° C. in a lightless environment until fully mixed, and vacuum dried at 70° C. in a lightless environment to constant weight to obtain the magnetron bonding material.

[0013] In some embodiments, an adhesion promoter is further added to obtain the mixed system. Specifically, the preparation method comprises: mechanically stirring and ultrasonically oscillating at least two or more mutually soluble resins, a dispersant, a promoter, an adhesion promoter, and a surface-modified metal powder at 30-70°C until fully mixed to obtain a mixed system; dissolving a photoacid generator and a thermal initiator in dichloromethane, adding the mixture to the mixed system, mechanically stirring and ultrasonically oscillating at 30-60°C in a dark environment until fully mixed, and vacuum drying at 70°C in a dark environment to constant weight to obtain the magnetron bonding material.

[0014] The present application also provides an emergency pressure plugging method, including:

[0015] Applying a strong magnetic device with a pressure relief port and a pressure relief valve to the leakage port of the leaking facility, causing the strong magnetic device to be attracted to the leakage port, aligning the pressure relief port with the leakage port, opening the pressure relief valve to discharge the leaking medium and reduce the partial pressure of the contact surface;

[0016] Applying the magnetron bonding material as described in any of the preceding items around the connection between the strong magnetic device and the leakage facility;

[0017] Irradiating the magnetron bonding material with ultraviolet light for 1 to 5 minutes to induce a stable and continuous polymerization reaction of the magnetron bonding material to achieve deep curing and bonding;

[0018] Close the pressure relief valve on the strong magnetic device to complete the emergency pressurized sealing.

[0019] When the blockage needs to be dissociated, an alternating magnetic field is applied around the blockage component to gradually separate the blockage component and the material.

[0020] In some embodiments, the leakage facilities are made of ferromagnetic materials, including but not limited to ferromagnetic pipes, ferromagnetic pressure storage tanks, and ferromagnetic pressure equipment.

[0021] As can be seen from the above, the magnetron adhesive material provided by the embodiment of the present application adds surface-modified nano-ferromagnetic metal powder to two or more mutually soluble resin carriers, so that the prepared magnetron adhesive material can spontaneously migrate to the area with high magnetic field intensity, adapt to the physical structure and be tightly adsorbed thereon. As the ambient magnetic field intensity increases, the mechanical properties of the material are enhanced. At the same time, it can be used as an armature to form a closed magnetic circuit to increase the magnetic attraction, thereby resisting the leakage partial pressure. In combination with a photoacid generator and a thermal initiator, the magnetron adhesive material is rapidly cured into a magnetron elastomer under ultraviolet light irradiation. The magnetron elastomer itself and its adhesion to the contact surface have high mechanical strength. The magnetron adhesive material can cooperate with a strong magnetic device to seal leaking ferromagnetic pipes, containers and other pressure equipment. In addition, under certain conditions, the magnetron adhesive material undergoes a rapid polymerization reaction, which can bond the leaking ferromagnetic pressure equipment to the strong magnetic device, further improving the sealing and repair strength, thereby achieving emergency sealing of the leak. When the emergency sealing needs to be released, magnetic desorption can be achieved by simply applying an alternating magnetic field around the sealing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Schematic diagram of the curing reaction mechanism of the magnetron bonding material according to an embodiment of the present application;

[0024] Figure 2 This is a flow chart of the emergency pressure plugging method according to an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of a strong magnetic device for pressure sealing in conjunction with a magnetron adhesive material according to an embodiment of the present application.

[0026] In the figure, there is a valve 1, a handle 2, a discharge port 3, a steel plate 4, a permanent magnet 5, and a pressure relief port 6. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The words "including" or "comprising" and the like used in the embodiments of the present application mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] As mentioned in the background technology section, the leakage of hazardous chemicals seriously endangers the ecological environment, industry and public safety, and the danger and coverage of leakage accidents increase with the time of leakage. Timely and effective leakage emergency disposal methods are of great significance for controlling the consequences of leakage accidents. However, existing plugging methods, such as pipe clamps, wooden wedges, etc., are difficult to implement, have a low success rate, and may even aggravate the leakage situation. The development of new, efficient and reliable emergency pressure plugging materials and methods is of great significance to improving the country's accident emergency response level, reducing environmental pollution, and ensuring public and production safety.

[0030] Based on this, the embodiments of the present application provide a magnetically controlled adhesive material, a synthesis method, and an emergency pressure sealing method thereof, which can, to a certain extent, solve problems such as leakage and sealing failure of ferromagnetic pressure equipment such as pipelines and storage tanks.

[0031] The magnetron bonding material provided in the embodiments of the present application is mainly synthesized from the following raw materials, in parts by mass: 23.7 to 60 parts of surface-modified metal powder, 0.5 to 2.5 parts of a photoacid generator, 0.1 to 3.0 parts of a thermal initiator, 0.1 to 0.8 parts of a dispersant, 1.0 to 5.0 parts of a promoter, and the remainder being two or more mutually soluble resins; after being initiated by ultraviolet light, the magnetron bonding material has the ability to form a stable and continuous deep polymerization reaction.

[0032] The magnetron bonding material of the present invention utilizes surface-modified nano-ferromagnetic metal powder as a filler for the magnetron bonding material; a combination of at least two mutually soluble resins as a carrier liquid, and a photoacid generator and a thermal initiator to impart rapid, deep-layer curing capabilities to the magnetron bonding material, resulting in the synthesized magnetron bonding material having both high bonding strength and inherent mechanical strength. During application, under the action of a magnetic field, the ferromagnetic nano-metal powder filler is magnetized, pulling the carrier liquid for directional movement, macroscopically exhibiting migration to areas of high magnetic field intensity, and gradually compacting, exhibiting solid properties. When the magnetron bonding material is used in conjunction with a high-pressure magnetic device with a pressure relief port and a pressure relief valve to repair a damaged oil pipeline, the high-pressure magnetic device relies on magnetic attraction to adhere to the leak port, with the pressure relief port aligned with the leak port to divert the leaked medium and reduce the partial pressure of the contact surface. Under the influence of the magnetic field, the magnetron bonding material adheres to the joint between the high-pressure magnetic device and the leaking equipment, and under the action of the magnetic field, it transforms into a solid property with enhanced mechanical properties, thereby resisting minute leaks in the joint gap, achieving a seal, and acting as an armature to enhance the adsorption force of the high-pressure magnetic device. Furthermore, the magnetron bonding material solidifies rapidly under ultraviolet light conditions, and can firmly bond the wall near the leakage port to the strong magnetic device, thereby achieving the effect of reinforcement and repair; finally, the pressure relief valve of the strong magnetic device is closed to complete the emergency plugging.

[0033] In some embodiments, the at least two mutually soluble resins may be selected from epoxy resins, polyketone resins, fluorocarbon resins, acrylic resins, polyurethanes, alkyd resins, and phenolic resins. At least two of the resins selected from these resins have good compatibility.

[0034] In some embodiments, the at least two mutually soluble resins are epoxy resin and acrylic resin. The combination of epoxy resin and acrylic resin can form a completely compatible polymer blend system.

[0035] In some embodiments, the reactants further include 0.1 to 0.5 parts by weight of an adhesion promoter. This amount of adhesion promoter can improve the adhesion of the magnetron bonding material to the leaking wall during curing, as well as the adhesion of the carrier liquid to the nanometal filler surface, thereby increasing the bond strength after curing.

[0036] In some embodiments, the surface-modified metal powder is selected from at least one of nano-iron powder, nano-nickel powder, nano-nickel oxide, nano-iron oxide, nano-cobalt powder, and nano-carbonyl iron powder; and the surface modification of the nano-ferromagnetic powder is one or more of amino, epoxidation, thiol, and olefination. The surface modification of the nanopowder improves the compatibility of the inorganic filler with the organic carrier liquid, thereby enabling better dispersion of the powder within the filler. Furthermore, the surface-modified functional groups participate in polymerization reactions to form an organic-inorganic composite material, which exhibits macroscopically enhanced mechanical properties.

[0037] In some embodiments, the photoacid generator is one or more of triaryl sulfonium hexafluorophosphate, diaryl iodonium hexafluoroantimonate, and hexaaryldiimidazole; and the thermal initiator is benzopinacol.

[0038] In some embodiments, as Figure 1 As shown, the curing mechanism of the magnetron adhesive material is as follows: the photoacid generator forms free radicals or proton acids under ultraviolet light excitation, which initiates the ring-opening polymerization reaction of the epoxy group and the addition polymerization chain reaction of the vinyl group. The heat released during the reaction excites the thermal initiator to generate free radicals, which synergistically react with the unexcited photoacid generator to further promote the polymerization reaction, forming a dual chain reaction of free radical-induced cationic front polymerization and free radical polymerization. From a macroscopic perspective, this manifests as the rapid deep curing of the magnetron adhesive material.

[0039] In some embodiments, the dispersant is selected from at least one of fatty alcohol polyoxyethylene ether, Span80, lauramide betaine, sodium dodecylbenzenesulfonate, and sodium secondary alkylsulfonate, or a mixture thereof, which can improve the dispersibility of the surface-modified nano-metal powder in the resin, thereby improving the magnetic field response performance and cured bonding strength of the final magnetron bonding material.

[0040] In some embodiments, the accelerator is at least one of 2,4,6-tris(dimethylaminomethyl)phenol, N-(4-chlorophenyl)-N',N'-dimethylurea, diethylenetriamine, and ethylene glycol diglycidyl ether; it can significantly improve the reaction activity of the system, thereby ensuring that the polymerization reaction can proceed stably and continuously after the start of ultraviolet light initiation.

[0041] Based on the same inventive concept, an embodiment of the present application also provides a method for synthesizing the magnetic control adhesive material as described in any of the previous technical solutions.

[0042] The preparation method of the magnetron bonding material provided in the embodiment of the present application includes:

[0043] At least two or more mutually soluble resins, dispersants, promoters, adhesion promoters and surface-modified nano-metal powders are mechanically stirred and ultrasonically vibrated at 30-70° C. until fully mixed to obtain a magnetron material without curing and bonding properties.

[0044] The photoacid generator and the thermal initiator are dissolved in dichloromethane, added to the mixed system, mechanically stirred and ultrasonically shaken at 30-60° C. in a lightless environment until fully mixed, and vacuum dried at 70° C. in a lightless environment to constant weight to obtain a magnetron bonding material with ultraviolet light-induced curing performance.

[0045] In the reactants, the mass fraction of the resin is 28.7% to 65%; the mass fraction of the nano metal powder is 23.7% to 60%; the mass fraction of the photoacid generator is 0.5% to 2.5%; the mass fraction of the thermal initiator is 0.1% to 3.0%; the mass fraction of the dispersant is 0.1% to 0.8%; and the mass fraction of the accelerator is 1% to 5%.

[0046] In some embodiments, the surface-modified nano-metal powder can be fully dispersed by mechanical stirring and ultrasonic vibration, so that the prepared magnetron bonding material exhibits isotropy and has good performance.

[0047] In some embodiments, the method may further include irradiating the magnetron bonding material with ultraviolet light to initiate a dual chain reaction of free radical-induced cationic front-end polymerization and free radical polymerization, thereby rapidly curing and bonding.

[0048] The main reactions that occur in this step include:

[0049] 1) The free radicals generated by the photoacid generator and the thermal initiator promote the vinyl addition polymerization of the acrylate. The free radical polymerization reaction formula is shown in formula (I).

[0050]

[0051] 2) The protonic acid generated by the photoacid generator promotes the ring-opening polymerization of the epoxy groups of the epoxy resin. The reaction formula is shown in Formula (II).

[0052]

[0053] Because both polymerization processes react rapidly and exothermically, the released heat decomposes the thermal initiator in the unreacted materials, generating free radicals that further stimulate the free radical polymerization reaction in formula (I). Simultaneously, the free radicals induce the photoacid generator to produce proton acid, which in turn initiates the ring-opening polymerization reaction in formula (II). This results in the formation of a stable, propagating polymerization wave, enabling rapid polymerization and curing of the deep-layered magnetron bonding material even without exposure to UV light. The mechanism for this continuous chain polymerization is shown in formula (III).

[0054]

[0055] In some embodiments, mechanical stirring and ultrasonic vibrations are used to thoroughly mix the components, resulting in a magnetically controlled adhesive material with UV-induced rapid curing. Once applied to the interface between the strong magnetic device and the leaking equipment, the magnetically controlled adhesive material maintains stable adhesion due to electromagnetic forces, sealing the leak. After subsequent curing, it forms a robust magnetically controlled elastomer, further strengthening the repair.

[0056] The magnetic control performance of the material is also reflected in the fact that based on the principle of magnetocaloric effect, by utilizing hysteresis loss and eddy current effect, the material temperature can be controlled through the magnetic field. When the temperature reaches a certain level, the adhesion fails and magnetically controlled desorption is achieved.

[0057] The method of the above embodiment has the beneficial effects of the aforementioned magnetron bonding material embodiment, which will not be described in detail here.

[0058] Based on the same inventive concept, corresponding to the magnetron adhesive material in any of the above embodiments, one or more embodiments of this specification also provide the application of the magnetron adhesive material described in any of the above technical solutions or the magnetron adhesive material obtained by the synthesis method described in the above technical solution in emergency pressure sealing of leaks.

[0059] One or more embodiments of this specification provide an emergency pressure-sealing method, utilizing the magnetically controlled adhesive material described in any of the above technical solutions, or the magnetically controlled adhesive material produced by the synthesis method described in the above technical solutions, for repair. During repair, the magnetically controlled adhesive material can be used in conjunction with a strong magnetic device. Specifically, after the strong magnetic device is attached to the leak, the magnetically controlled adhesive material can be applied around the junction between the strong magnetic device and the wall near the leak.

[0060] like Figure 3As shown, in some embodiments, a model structure of a strong magnetic device is shown, specifically comprising a steel plate 4 with a permanent magnet 5, a pressure relief port 6, a discharge port 3, a valve 1, and a handle 2. The lower portion of the structure can be understood as comprising a permanent magnet 5 with a pressure relief port 6 at the center of the bottom surface, and a ferromagnetic steel plate 4 with a valve 1 and handle 2 at the top. The pressure relief port 6 and the discharge port 3 are connected, with the valve 1 controlling the opening and closing of the passage. The permanent magnet 5 directly contacts the wall near the leaking device, and the pressure relief port 6 faces the leaking port, allowing the leaked medium to be discharged through the discharge port 3. This creates a gap between the steel plate 4 and the wall near the leaking port.

[0061] In some embodiments, the permanent magnet is a high-temperature resistant neodymium iron boron strong magnet.

[0062] In some embodiments, the bottom surface of the permanent magnet 5 can be processed into any arc according to the shape of the wall of the leakage equipment to maximize the fit between the strong magnetic device and the wall near the leakage port and reduce seepage.

[0063] See also Figure 2 , the emergency pressure plugging method provided in the embodiment of the present application includes:

[0064] S5, opening the pressure relief valve, applying a strong magnetic device with a pressure relief port and a pressure relief valve to the leak port, causing the strong magnetic device to be attracted to the wall near the leak port, with the pressure relief port facing the leak port, so that the leaked medium is discharged through the pressure relief port, and forming a gap between the steel plate and the wall where the leak port is located;

[0065] S6, applying the magnetron bonding material as described in any of the preceding items or the magnetron bonding material obtained by the synthesis method as described in any of the preceding items to the gap;

[0066] S7, irradiating the magnetron adhesive material with ultraviolet light for 1 to 5 minutes, so that the magnetron adhesive material starts a rapid curing and bonding reaction, thereby bonding the strong magnetic device to the wall near the leakage port.

[0067] S8, after the curing reaction of the magnetron adhesive material for 5 to 10 minutes, the pressure relief valve is closed to stop the leakage of the medium, thereby completing the emergency pressure plugging.

[0068] S9, applying an alternating magnetic field around the magnetron bonding material, desorbing the material and the device under the control of the magnetic field, and completing the blocking and dissociation.

[0069] In step S6, the magnetron adhesive material is applied to the gap, which can be understood as applying the magnetron adhesive material to the circumferential surface of the permanent magnet. Under the action of the magnetic field of the permanent magnet, the magnetron adhesive material can be firmly adsorbed on the wall surface around the strong magnetic device and the leakage port, and due to its own magnetic field response characteristics, it can be transformed from a fluid to a plastic solid, thereby improving the shear resistance and achieving sealing. Furthermore, the magnetron adhesive material has good magnetic permeability and can serve as an armature to connect the strong magnetic device and the wall surface near the leakage port, so that a closed magnetic circuit is formed between the wall surface and the strong magnet, thereby improving the magnetic attraction of the strong magnetic device to the leakage equipment.

[0070] In step S7, after being exposed to ultraviolet light for 1 to 5 minutes, the magnetron adhesive material begins to rapidly polymerize from the outside to the inside, forming a magnetron elastomer with high structural strength and bonding strength, which well bonds the wall near the leak and the strong magnetic device together, further strengthening the seal to ensure that the strong magnetic device will not be bounced open by the leakage pressure after the pressure relief valve is closed.

[0071] The oil pipeline repair method provided in the embodiment of the present application, the specific principle of the emergency pressure sealing of the magnetron adhesive material and the strong magnetic device in coordination is: using the strong magnetic attraction of the permanent magnet to ferromagnetic leakage equipment such as pipelines or pressure vessels to resist the leakage pressure, further, using the pressure relief port to guide the leaking medium out and release the leakage pressure to reduce the repulsive force on the strong magnetic device caused by the leakage pressure. At the same time, due to many factors such as processing accuracy and wall deformation, the strong magnetic device and the wall near the leakage port are often unable to fully fit together and have no sealing effect. By diverting the pressure relief port, the leakage medium seepage at the contact surface between the permanent magnet and the wall near the leakage port can be reduced. Further, the magnetron adhesive material is applied around the permanent magnet. Due to the electromagnetic force, the magnetron adhesive material is adsorbed on the permanent magnet and the surrounding wall surface. At the same time, due to its own magnetic field response characteristics, it transforms from a fluid to a plastic solid, and its shear resistance is significantly enhanced, thereby sealing the plugging contact surface. On the other hand, the magnetron bonding material has excellent magnetic permeability and can act as an armature to connect the strong magnetic device and the leaking wall, forming a closed magnetic circuit, thereby increasing the magnetic attraction of the strong magnetic device to the pipe wall and stabilizing the seal. Furthermore, under ultraviolet light irradiation, it can trigger a rapid and continuous polymerization reaction from the surface to the inside, bonding the leaking wall and the strong magnetic device together, further strengthening the repair effect. After the curing and bonding are completed, the pressure relief valve is closed to block the medium leakage and complete the emergency pressurized sealing operation. When the emergency seal needs to be removed, the alternating magnetic field is used to control the desorption of the material and demagnetize the strong magnet at the same time to achieve the dissociation of the seal.

[0072] The emergency pressure plugging method of the embodiment of the present application adopts the magnetic control adhesive material provided in the embodiment of the present application or the prepared magnetic control adhesive material, and cooperates with the strong magnetic device. Due to the magnetic field response characteristics and magnetic permeability, the strong magnet and the pipe wall of the oil pipeline form a closed magnetic circuit, which can achieve emergency pressure plugging for leakage of the ferromagnetic pressure device. At the same time, the magnetic control adhesive material can quickly and deeply solidify under ultraviolet light in natural light, forming a magnetic control elastomer with high mechanical strength and bonding strength, strengthening the plugging, ensuring that the strong magnetic device will not rebound under the action of pressure after closing the pressure relief valve, and no leakage medium will seep through the contact surface.

[0073] The technical solution of this application is further explained below in conjunction with specific implementation methods.

[0074] The experimental methods in the following examples are conventional methods unless otherwise specified.

[0075] Unless otherwise specified, the test materials used in the following examples were purchased from conventional biochemical reagent stores.

[0076] Example 1:

[0077] 150 g of epoxy resin was placed in a polytetrafluoroethylene beaker, 50 g of acrylate was added, and the mixture was mechanically stirred in a 60° C. water bath until fully mixed; 5 g of a photoacid generator and 5 g of a thermal initiator were dissolved in dichloromethane and added to the mixture; 5 g of ethylene glycol diglycidyl ether, 1 g of γ-glycidyloxypropyltrimethoxysilane, 0.5 g of fatty alcohol polyoxyethylene ether, and 100 g of surface-modified nano-metal powder were added, the mixture was mechanically stirred and ultrasonically shaken in a light-free environment at 60° C. until fully mixed, and the mixture was placed in a light-shielded vacuum drying oven at 70° C. and dried to constant weight to obtain the magnetron bonding material;

[0078] Open the emergency pressure plugging detection device to simulate gas leakage. The leakage medium is air. Figure 3 Open the pressure relief valve of the strong magnetic device and apply it to the leak in the sealing detection device. Apply the magnetron adhesive material around the permanent magnet, filling the gap between the steel plate and the detection device. Irradiate with a UV curing lamp for 5 minutes and let it stand for 10 minutes until it is fully cured. Close the pressure relief valve to verify the success of the emergency pressurized plugging.

[0079] Example 2:

[0080] 150 g of epoxy resin was placed in a polytetrafluoroethylene beaker, 10 g of acrylate was added, and the mixture was mechanically stirred under heating in a water bath at 60° C. until fully mixed; 3 g of a photoacid generator and 1 g of a thermal initiator were dissolved in dichloromethane and added to the mixture; 7 g of ethylene glycol diglycidyl ether, 1 g of γ-glycidyloxypropyltrimethoxysilane, 0.5 g of fatty alcohol polyoxyethylene ether, and 100 g of surface-modified nano-metal powder were added, the mixture was mechanically stirred and ultrasonically shaken under a lightless environment at 60° C. until fully mixed, and the mixture was placed in a light-shielded vacuum drying oven at 70° C. and dried to constant weight to obtain the magnetron bonding material;

[0081] Open the emergency pressure plugging detection device to simulate gas leakage. The leakage medium is air. Figure 3 Open the pressure relief valve of the strong magnetic device and apply it to the leak in the sealing detection device. Apply the magnetron adhesive material around the permanent magnet, filling the gap between the steel plate and the detection device. Irradiate with a UV curing lamp for 5 minutes and let it stand for 10 minutes until it is fully cured. Close the pressure relief valve to verify the success of the emergency pressurized plugging.

[0082] Example 3:

[0083] 150 g of epoxy resin was placed in a polytetrafluoroethylene beaker, 1 g of acrylate was added, and the mixture was mechanically stirred under heating in a water bath at 60° C. until fully mixed; 5 g of a photoacid generator and 5 g of a thermal initiator were dissolved in dichloromethane and added to the mixture; 10 g of ethylene glycol diglycidyl ether, 1 g of γ-glycidyloxypropyltrimethoxysilane, 0.5 g of fatty alcohol polyoxyethylene ether, and 100 g of surface-modified nano-metal powder were added, the mixture was mechanically stirred and ultrasonically shaken under a lightless environment at 60° C. until fully mixed, and the mixture was placed in a light-shielded vacuum drying oven at 70° C. and dried to constant weight to obtain the magnetron bonding material;

[0084] Open the emergency pressure plugging detection device to simulate gas leakage. The leakage medium is air. Figure 3 Open the pressure relief valve of the strong magnetic device and apply it to the leak in the sealing detection device. Apply the magnetron adhesive material around the permanent magnet, filling the gap between the steel plate and the detection device. Irradiate with a UV curing lamp for 5 minutes and let it stand for 10 minutes until it is fully cured. Close the pressure relief valve to verify the success of the emergency pressurized plugging.

[0085] Example 4:

[0086] 150 g of epoxy resin was placed in a polytetrafluoroethylene beaker, 10 g of acrylate was added, and the mixture was mechanically stirred in a 60° C. water bath until thoroughly mixed; 3 g of a photoacid generator and 1 g of a thermal initiator were dissolved in dichloromethane and added to the mixture; 7 g of ethylene glycol diglycidyl ether, 0.5 g of fatty alcohol polyoxyethylene ether, and 100 g of surface-modified nano-metal powder were added, and the mixture was mechanically stirred and ultrasonically shaken in a light-free environment at 60° C. until thoroughly mixed. The mixture was then dried in a light-shielded vacuum drying oven at 70° C. to constant weight to obtain the magnetron bonding material;

[0087] Open the emergency pressure plugging detection device to simulate gas leakage. The leakage medium is air. Figure 3 Open the pressure relief valve of the strong magnetic device and apply it to the leak in the sealing detection device. Apply the magnetron adhesive material around the permanent magnet, filling the gap between the steel plate and the detection device. Irradiate with a UV curing lamp for 5 minutes and let it stand for 10 minutes until it is fully cured. Close the pressure relief valve to verify the success of the emergency pressurized plugging.

[0088] Comparative Example 1:

[0089] 150 g of epoxy resin was placed in a polytetrafluoroethylene beaker, 30 g of acrylate was added, and the mixture was mechanically stirred in a 60° C. water bath until fully mixed; 3 g of a photoacid generator and 1 g of a thermal initiator were dissolved in dichloromethane and added to the mixture; 7 g of ethylene glycol diglycidyl ether, 1 g of γ-glycidyloxypropyltrimethoxysilane, 0.5 g of fatty alcohol polyoxyethylene ether, and 10 g of surface-modified nano-metal powder were added, and the mixture was mechanically stirred and ultrasonically shaken in a light-free environment at 60° C. until fully mixed. The mixture was then dried in a light-shielded vacuum drying oven at 70° C. to constant weight to obtain the magnetron bonding material;

[0090] Open the emergency pressure plugging detection device to simulate gas leakage. The leakage medium is air. Figure 3 Open the pressure relief valve of the strong magnetic device and apply it to the leak of the sealing detection device. Apply the magnetron adhesive material around the permanent magnet to fill the gap between the steel plate and the detection device. Irradiate with a UV curing lamp for 5 minutes and let it stand for 10 minutes until it is fully cured. Close the pressure relief valve to check whether the emergency pressure sealing is successful. Comparative Example 2

[0091] 150 g of epoxy resin was placed in a polytetrafluoroethylene beaker, 30 g of acrylate was added, and the mixture was mechanically stirred in a 60° C. water bath until fully mixed; 3 g of a photoacid generator and 1 g of a thermal initiator were dissolved in dichloromethane and added to the mixture; 7 g of ethylene glycol diglycidyl ether, 1 g of γ-glycidyloxypropyltrimethoxysilane, 0.5 g of fatty alcohol polyoxyethylene ether, and 300 g of surface-modified nano-metal powder were added, the mixture was mechanically stirred and ultrasonically shaken in a light-free environment at 60° C. until fully mixed, and the mixture was placed in a light-shielded vacuum drying oven at 70° C. and dried to constant weight to obtain the magnetron bonding material;

[0092] Open the emergency pressure plugging detection device to simulate gas leakage. The leakage medium is air. Figure 3 Open the pressure relief valve of the strong magnetic device and apply it to the leak in the sealing detection device. Apply the magnetron adhesive material around the permanent magnet, filling the gap between the steel plate and the detection device. Irradiate with a UV curing lamp for 5 minutes and let it stand for 10 minutes until it is fully cured. Close the pressure relief valve to verify the success of the emergency pressurized plugging.

[0093] Performance test: The repair effects of the strong magnetic device, Example 1, Example 2, Example 3, and Comparative Examples 1 and 2 were tested. The test performance included tensile strength, plugging pressure, and curing temperature.

[0094] The tensile strength test involves pulling the pressure-sealing detection device and the sealing device of the test assembly apart perpendicular to the contact surface using a universal testing machine after the applied magnetic bonding material has fully cured. The maximum tensile force at separation is recorded as the tensile strength. The pulling speed is 10 mm / min.

[0095] The plugging pressure test specifically includes: after the applied magnetic control adhesive material is completely cured, close the pressure relief valve, observe whether the plugging pressure is stable, and whether there is any small leakage on the bonding surface. If the plugging pressure is stable and there is no leakage, it means that the emergency pressure plugging is successful and can withstand the tested leakage pressure. Continue to increase the test pressure until the plugging fails, and record the highest plugging pressure.

[0096] The curing temperature test specifically includes: randomly attaching 10 thermocouples to the surface of the magnetron bonding material, testing the surface temperature change during the polymerization reaction, recording the surface peak temperature, and taking the average of the peak temperatures recorded by the 10 thermocouples as the test result of the curing temperature.

[0097] Table 1 Emergency pressure sealing performance of magnets, Examples 1 to 3 and Comparative Examples 1 to 2

[0098]

[0099] As shown in Table 1, the magnetron adhesive materials prepared in Examples 1 to 4 of the present application exhibited tensile strengths of 2067N to 4962N after emergency pressure plugging, and were able to plug leak pressures within 3 MPa. The material curing and bonding temperatures during the emergency pressure plugging process ranged from 178°C to 207°C. Therefore, the magnetron adhesive materials prepared in Examples of the present application exhibit excellent tensile strength and pressure-bearing capacity, making them suitable for leaking media that remain stable at 207°C.

[0100] Comparing Example 2 with Comparative Example 1, it can be seen that when the amount of surface-modified nano-ferromagnetic powder is lower than the set range of this application, the tensile strength of the prepared magnetron bonding material is extremely low during testing, even lower than the tensile strength of the strong magnetic device alone, and emergency pressure sealing cannot be achieved, and the peak temperature of the curing reaction is also very high. This is because the magnetic field response performance of the synthesized magnetron bonding material is poor when the amount of ferromagnetic filler is too low, and it is difficult to prevent seepage at the contact interface; in addition, the low content of metal filler makes the thermal conductivity of the material poor, and the high temperature generated by the continuous accumulation of heat during the curing process causes the organic components in the material to undergo thermal decomposition, and the high temperature demagnetizes the permanent magnet, so the tensile strength drops sharply, and emergency pressure sealing cannot be achieved. Comparing Example 3 with Comparative Example 2, it can be seen that when the amount of surface-modified nano-metal powder exceeds the set range of this application, although the tensile strength of the prepared magnetron bonding material is significantly improved in the test, it is also unable to seal. This is because more ferromagnetic fillers improve the magnetic permeability of the synthesized magnetron bonding material, thereby strengthening the magnetic attraction of the strong magnetic device to the ferromagnetic wall surface, but, due to the excessive reduction of the filler with the contact of the carrier liquid with the wall surface of the solidification bonding function, the sealing ability of the material is decreased, and in addition, excessive fillers can also block the polymerization chain reaction, and the curing strength of the material is significantly reduced, and therefore does not have blocking ability. As can be seen, when the addition amount of the surface-modified nano metal powder is too large or too small, it is impossible to achieve emergency pressure blocking. Comparing Example 2 with Example 4, it can be seen that adhesion promoter can improve the bonding strength to a certain extent, and also improves on the maximum blocking pressure, because adhesion promoter can improve the adhesion of the magnetron bonding material on the wall surface by coupling action, thereby improving the bonding strength.

[0101] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Within the scope of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0102] While the disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0103] The embodiments of the present disclosure are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A magnetron bonding material, characterized in that: The magnetron bonding material is mainly synthesized from the following raw materials in parts by mass: 23.7 to 60 parts of surface-modified metal powder, 0.5 to 2.5 parts of a photoacid generator, 0.1 to 3.0 parts of a thermal initiator, 0.1 to 0.8 parts of a dispersant, 1.0 to 5.0 parts of an accelerator, and the remainder being two or more mutually soluble resins; After being initiated by ultraviolet light, the magnetron bonding material has the ability to form a stable deep polymerization reaction.

2. The magnetron bonding material according to claim 1, characterized in that The metal powder in the surface-modified metal powder is selected from at least one of nano iron powder, nano nickel powder, nano nickel oxide, nano iron oxide, nano cobalt powder, and nano carbonyl iron powder; The surface modification type of the surface-modified metal powder is one or more of amino surface modification, epoxidation surface modification, thiol surface modification, and olefination surface modification.

3. The magnetron bonding material according to claim 1, characterized in that: The two or more mutually soluble resins include epoxy resins, polyketone resins, fluorocarbon resins, acrylic resins, polyurethanes, alkyd resins and phenolic resins.

4. The magnetron bonding material according to claim 3, characterized in that: The two or more mutually soluble resins specifically include epoxy resin and acrylic resin.

5. The magnetron bonding material according to claim 1, characterized in that: The photoacid generator is one or more of triaryl sulfonium hexafluorophosphate, diaryl iodonium hexafluoroantimonate, and hexaaryldiimidazole; The thermal initiator is benzopinacol; The dispersant is at least one of fatty alcohol polyoxyethylene ether, Span80, lauramide betaine, sodium dodecylbenzene sulfonate, and sodium secondary alkyl sulfonate; The accelerator is at least one of 2,4,6-tris(dimethylaminomethyl)phenol, N-(4-chlorophenyl)-N',N'-dimethylurea, diethylenetriamine, and ethylene glycol diglycidyl ether.

6. The magnetron bonding material according to claim 1, characterized in that The invention also includes 0.1 to 0.5 parts of an adhesion promoter, wherein the adhesion promoter is one or more of γ-glycidyloxypropyltrimethoxysilane, vinyltriethoxysilane, and γ-methacrylatepropyltrimethoxysilane.

7. A method for preparing a magnetron bonding material according to any one of claims 1 to 6, characterized in that: include: At least two or more mutually soluble resins, a dispersant, a promoter, and a surface-modified metal powder are mechanically stirred and ultrasonically vibrated at 30-70° C. until fully mixed to obtain a mixed system; a photoacid generator and a thermal initiator are dissolved in dichloromethane, added to the mixed system, mechanically stirred and ultrasonically vibrated at 30-60° C. in a lightless environment until fully mixed, and vacuum dried at 70° C. in a lightless environment to constant weight to obtain the magnetron bonding material.

8. The method for preparing the magnetron bonding material according to claim 7, characterized in that: After adding an adhesion promoter, the mixed system is obtained.

9. An emergency pressure plugging method, characterized in that: include: Applying a strong magnetic device with a pressure relief port and a pressure relief valve to the leakage port of the leaking facility, causing the strong magnetic device to be attracted to the leakage port, aligning the pressure relief port with the leakage port, opening the pressure relief valve to discharge the leaking medium and reduce the partial pressure of the contact surface; Applying the magnetron bonding material according to any one of claims 1 to 6 around the connection between the strong magnetic device and the leakage facility; Irradiating the magnetron bonding material with ultraviolet light for 1 to 10 minutes to induce a stable and continuous polymerization reaction of the magnetron bonding material to achieve deep curing and bonding; Close the pressure relief valve to complete the emergency pressure sealing.

10. The emergency pressure plugging method according to claim 9, characterized in that: The leakage facilities are made of ferromagnetic materials, including ferromagnetic pipes, ferromagnetic pressure storage tanks, and ferromagnetic pressure equipment; When dissociation and plugging are required, an alternating magnetic field is applied around the connection between the strong magnetic device and the leakage facility to separate the magnetron bonding material.

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