CN111526683B - Passive moisture-proof and rust-proof method for electrical cabinet - Google Patents
Passive moisture-proof and rust-proof method for electrical cabinet Download PDFInfo
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- CN111526683B CN111526683B CN202010361119.7A CN202010361119A CN111526683B CN 111526683 B CN111526683 B CN 111526683B CN 202010361119 A CN202010361119 A CN 202010361119A CN 111526683 B CN111526683 B CN 111526683B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5003—Polyethers having heteroatoms other than oxygen having halogens
- C08G18/5015—Polyethers having heteroatoms other than oxygen having halogens having fluorine atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2190/00—Compositions for sealing or packing joints
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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Abstract
The invention provides a passive moisture and rust prevention method for an electrical cabinet, which combines gas phase rust prevention, water and rust prevention, closed rust prevention and intelligent humidity measurement rust prevention, and performs all-directional rust prevention aiming at different characteristics of various electric devices in the electrical cabinet to form an electrical cabinet ecological circle with healthy rust prevention and long service cycle. The gas phase rust-resisting part in the method comprises the steps of arranging an anti-condensation gas sealing and blocking material at the bottom in the electric cabinet and arranging a rust-resisting film box on the inner side wall of the electric cabinet to prevent external moisture from flowing in; the waterproof and rust-resistant part comprises a dew isolating cotton arranged at the top in the electrical cabinet to prevent the top of the cabinet from dripping; the closed type rust-resisting part comprises a strippable sealant which is hermetically wrapped on the surface of an exposed wire end or a terminal so as to prevent the small-sized fixed electric appliance device from being rusted; the intelligent humidity measuring and rust resisting part comprises an intelligent constant humidity sheet arranged on the inner wall of the electric cabinet, and the humidity in the electric cabinet is monitored in real time by utilizing the humidity absorption and humidity elimination performance of the intelligent constant humidity sheet.
Description
Technical Field
The invention belongs to the technical field of moisture and rust prevention of electric appliances, and particularly relates to a passive moisture and rust prevention method for an electric cabinet.
Background
With the development of modern electrification technology, the integration and intensification of electrical appliances become the mainstream development trend. The electric integrated control or operation cabinet is widely applied to the fields of chemical industry, environmental protection, electric power, metallurgy, nuclear industry, fire safety monitoring, traffic and the like. The regulator cubicle and inside components and parts are made by the metal mostly, because the service environment of different trades regulator cubicles is different, and the climatic conditions of each place is also different, and the inside and the outside of regulator cubicle all receive the erosion of moisture easily, and then cause the corrosion, seriously influence the life of regulator cubicle and inside components and parts, and then influence whole electrical system's use.
Currently, various rust inhibitors have been developed in the field of rust inhibition, especially for metals, for example, patent CN01135166.7 discloses an aqueous metal rust inhibitor, which is formulated as follows by weight percentage: 4-6% of triethanolamine, 1.5-3% of sodium benzoate and NaNO210-15％，NaH2PO40.15-0.3％，NaHCO30.9-1.1 percent of glycerol, 0.8-1.1 percent of glycerol and the balance of water; the rust inhibitor can be directly sprayed on a steel production line, and reacts by means of the heat of steel to generate an anti-corrosion oxide film. Rust inhibitors have been gradually applied to metal parts such as reinforcing steel bars, concrete, and the like.
Because the regulator cubicle is inside to have a large amount of independent meticulous metal components and parts, the structure is complicated, and the operation frequency is higher, changes frequently, and the technical staff in the field is difficult to carry out careful dampproofing rust resistance to every metal components and parts and handles, and work load is big and efficiency is lower, and the treatment effect is also not good. In addition, the environment and the climate in which the electrical cabinet is used are different, so that the difficulty of moisture resistance and rust resistance is increased. At present, a common method is to use a dehumidifier to dehumidify the electrical cabinet, so that not only is the power consumption increased, but also the volume and the electrical operation risk of the electrical cabinet are increased. Therefore, aiming at the field of the electrical cabinet with a complex and precise structure, a complete set of technology aiming at a large number of fine metal components and complex moisture and rust prevention requirements is lacked, and meanwhile, the energy consumption and the equipment operation and maintenance risks can be reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a passive moisture and rust prevention method for an electrical cabinet, which combines gas phase rust prevention, water and rust prevention, closed rust prevention and intelligent humidity and rust measurement, and performs all-dimensional rust prevention aiming at different characteristics of various electric devices in the electrical cabinet to form an electrical cabinet ecological ring which is healthy, rust-proof and long in service cycle. The gas phase rust-resisting part in the method comprises the steps of arranging an anti-condensation gas sealing and blocking material at the bottom in the electric cabinet and arranging a rust-resisting film box on the inner side wall of the electric cabinet to prevent external moisture from flowing in; the waterproof and rust-resistant part comprises a dew isolating cotton arranged at the top in the electrical cabinet to prevent the top of the cabinet from dripping; the closed type rust-resisting part comprises a strippable sealant which is hermetically wrapped on the surface of an exposed wire end or a terminal so as to prevent the small-sized fixed electric appliance device from being rusted; the intelligent humidity measuring and rust resisting part comprises an intelligent constant humidity sheet arranged on the inner wall of the electric cabinet, and the humidity in the electric cabinet is monitored in real time by utilizing the humidity absorption and humidity elimination performance of the intelligent constant humidity sheet.
The moisture-proof and rust-resistant method provided by the invention is used for matching with different moisture-proof and rust-resistant components according to the characteristics of different positions and electric devices in the electric cabinet and the moisture-proof and rust-resistant requirements, and organically combines the passive moisture-proof and rust-resistant components of the dew condensation-proof air sealing and blocking material, the dew isolating cotton and the peelable sealant with the active moisture-proof and rust-resistant components of the rust-resistant film box and the intelligent constant-humidity sheet, so that a whole set of moisture-proof and rust-resistant technical scheme is formed according to the moisture characteristics of different moisture sources of the electric cabinet. The moisture-proof and rust-resistant material or component used in the invention does not need a power supply or external power equipment, and the material operates by virtue of the moisture-proof and rust-resistant functions of the material, so that the passivity is realized.
The anti-condensation gas sealing and blocking component is arranged at the bottom of the electrical cabinet and is an important part of gas phase rust resistance, and the anti-condensation gas sealing and blocking component is selected from precast slabs or castable. In practical use, the environment of the bottom of the electrical cabinet is the most humid, the temperature is low, the humidity is high, the ventilation condition is poor, 80-85% of moisture enters the electrical cabinet from the bottom of the electrical cabinet, particularly, the electrical cabinet is provided with a hole at the bottom for a pipeline to enter and exit the cabinet body, the moisture can easily enter the cabinet from the hole, and practices prove that the corrosion of the bottom of the electrical cabinet or a bottom plate is more serious and the speed is higher than that of other parts. Therefore, the bottom of the electrical cabinet is a key part for preventing moisture and rust of the electrical cabinet. The condensation-proof air-tight blocking material is used for blocking and obstructing the moisture and moisture diffusion at the bottom of the cabinet body, and the corrosion of the electric cabinet is restrained from the source, and is a key part in the moisture-proof and rust-proof method.
Preferably, when the bottom of the electrical cabinet is not provided with a pipeline hole but is an integral plate, the anti-condensation air-tight blocking material is in a prefabricated plate form, is convenient to install and maintain, and can integrally block moisture diffused at the bottom of the cabinet body. Preferably, when the bottom of the cabinet body is provided with the hole, the anti-condensation air sealing and blocking component is in a combined form of a precast slab and a castable or in a castable form, and can tightly seal the hole and the gap between the bottom plate and the side wall of the cabinet body according to different shapes of the bottom plate, so that moisture is completely prevented from entering the equipment.
The anti-condensation air-tight blocking component comprises A, B bi-components, wherein the component A comprises 100 parts by weight of modified polyether polyol, 0.5-1.5 parts by weight of water, 20-40 parts by weight of physical foaming agent, 1-3 parts by weight of catalyst and 1-3 parts by weight of chain extender, the component B comprises 60-100 parts by weight of polyisocyanate and 0-40 parts by weight of diisocyanate, and the modified polyether polyol is obtained by reacting and modifying fluorine-containing benzenediol glycidyl ether and polyether polyol.
According to the invention, the polyether polyol is modified by using the fluorine-containing benzenediol glycidyl ether generated by epoxy chloropropane and fluorine-containing benzenediol, and the polyurethane foam which has a cross-linked network structure and contains a fluorobenzene chain segment on the main chain is generated by adjusting the using amount, the proportion and the reaction conditions of the epichlorohydrin and the fluorine-containing benzenediol, so that the hydrophobic property, the mechanical property and the thermal oxygen aging resistance of the anti-condensation gas sealing and blocking component are improved.
The fluorophenol-containing hydroquinone glycidyl ether is obtained by reacting fluorine-containing hydroquinone with epoxy chloropropane, and the weight ratio of the fluorine-containing hydroquinone to the epoxy chloropropane is 1: 1.5-3.
The fluorine-containing benzenediol on the fluorine-containing benzenediol is at least one selected from 3-fluoro benzenediol, 4-fluoro-1, 2 benzenediol, 2-fluoro-1, 3 benzenediol, 5-fluoro resorcinol and 3-fluoro hydroquinone.
The preparation method of the fluorine-containing benzenediol glycidyl ether comprises the following steps:
1) dissolving fluorine-containing benzenediol in an organic solvent, stirring until the fluorine-containing benzenediol is completely dissolved, adding epoxy chloropropane, and continuously stirring until the epoxy chloropropane is completely dissolved;
2) heating the mixture obtained in the step 1) to 60-90 ℃, dropwise adding NaOH solution under the stirring condition, and continuing to react for 60-180min at constant temperature after dropwise adding;
3) filtering the mixture obtained in the step 2), washing the precipitate with hot water at 60-90 ℃, and drying to obtain the fluorine-containing benzenediol glycidyl ether.
The organic solvent in step 1) is not particularly limited, and may be one that can dissolve the reaction substance and does not participate in the chemical reaction, including but not limited to at least one of isopropanol, acetone, and diethyl ether.
The concentration of the NaOH solution in the step 2) is 20-50 wt%.
The modified polyether polyol is prepared by reacting fluorine-containing benzenediol glycidyl ether with polyether polyol under the catalysis of alkaline compounds such as tertiary amine and the like; the polyether polyol is primary hydroxyl-terminated polyether polyol, the hydroxyl functionality of the polyether polyol is 3-6, and the number average molecular weight is 400-800-.
The modified polyether polyol comprises the following raw materials: polyether polyol and fluorine-containing benzenediol glycidyl ether, wherein the weight ratio of the polyether polyol to the fluorine-containing benzenediol glycidyl ether is 5-10: 1.
Specifically, the preparation method of the modified polyether polyol comprises the following steps:
s1: dissolving polyether glycol in water, adding a catalyst, and stirring uniformly;
s2: heating the mixture system obtained in the step S1 to 90-120 ℃, and dropwise adding the fluorodiphenol-containing glycidyl ether under the condition of constant temperature stirring for reaction for 0.5-3 h;
s3: and (4) extracting the final mixture obtained in the step S2 by using an organic solvent, and removing the organic solvent by rotary evaporation to obtain the liquid modified polyether polyol.
Step S1, the catalyst is tertiary amine compound, including at least one of triethylamine and triethylene diamine; the dosage of the catalyst is 0.5-2% of the total mass of the reaction substances.
The organic solvent in step S3 is aromatic hydrocarbon or halogenated hydrocarbon, including but not limited to at least one of carbon trichloride and carbon tetrachloride.
The physical foaming agent comprises at least one of aliphatic hydrocarbon and halogenated hydrocarbon, and specifically at least one selected from cyclopentane, n-pentane, isopentane, monofluorodichloroethane, difluorochloromethane, and 1,1,3,3, 3-pentafluoropropane.
The catalyst in the component A is an amine or organic tin catalyst commonly used in the field, and comprises at least one of triethylamine, N-methylmorpholine, dibutyltin dilaurate and stannous octoate.
The polyisocyanate comprises at least one of aliphatic polyisocyanate and aromatic polyisocyanate, wherein the-NCO content of the polyisocyanate is 5-20%, and the polyisocyanate is specifically selected from
L, HL, IL, or
At least one of N100, N75, N3200, N3400, N3600 and N3800.
The diisocyanate is at least one selected from toluene diisocyanate, diphenylmethane diisocyanate and 1, 6-hexamethylene diisocyanate.
Preferably, the component A also comprises 1-3 parts by weight of foam stabilizer, wherein the foam stabilizer is organosilicon foam stabilizer, and is specifically selected from one or more of AK-8818 foam stabilizer B8525, foam stabilizer B8545, foam stabilizer DC5598 and foam stabilizer DC 193.
The chain extender comprises polyamine and polyalcohol, and is selected from at least one of triethanolamine, ethylene glycol, 1, 4-butanediol, trihydroxy methyl propane, benzidine and 3, 3-dichloro diphenyl diamine.
The invention also provides a preparation method of the anti-condensation air-tight blocking material, which comprises the following steps:
t1: adding the raw materials in the component A into a reaction container, and stirring to uniformly mix the raw materials;
t2: adding the vacuum defoamed B component to the mixture obtained in the step T1 while keeping stirring;
t3: pouring the mixture obtained in the step T2 into a mould for foaming when the mixture reaches a milky white state, and naturally curing for 48-72 hours after foaming is finished.
In the step T1, the stirring speed is 200-500rpm, and the stirring time is 30-60 s.
In the step T2, the addition time of the component B is 5-60s, the stirring speed is 200-500rpm, and the stirring time is 10-30 s.
The waterproof and rust-resistant part comprises a dew-isolating cotton arranged at the top in the electrical cabinet, so that the top of the cabinet is prevented from dripping. In actual use, a small part of moisture or humidity enters from the top of the electrical cabinet, and in addition, when the heat emitted during the operation of the electrical cabinet rises to the top, the heat is easy to be condensed, when water vapor is accumulated more, water drops can fall into the electrical cabinet, not only can the internal components and parts be corroded, but also the circuit can be shorted or broken more seriously, so that the potential safety hazard is great. Therefore, the moisture-proof and rust-proof method disclosed by the invention covers the interior of the top plate of the electrical cabinet by using the exposure-proof cotton, so that moisture invading from the exterior of the electrical cabinet is blocked, and condensed water in the interior of the cabinet body is absorbed and prevented from dripping. The exposure isolating cotton is convenient to install, and holes can be conveniently formed in the holes or pipelines of the top plate of the electrical cabinet in a size-adjustable mode.
The dew separation cotton is of a multilayer structure and comprises an elastic glass fiber grid plate, water absorption cotton and water storage cotton, wherein one layer of water storage cotton is respectively bonded on two sides of the elastic glass fiber grid plate, and one layer of water absorption cotton is respectively bonded on the outer sides of the water storage cotton on the two sides. The water storage cotton is formed by high water absorption resin, and the water absorption cotton is formed by coating hydrophilic materials on the water storage cotton.
The side wall of regulator cubicle sets up a plurality of hinder the rust bellows, is the important part that the gaseous phase hinders rust, and few part moisture or moisture get into from the regulator cubicle side wall, however because the lateral wall area of regulator cubicle that has is great, especially vertical regulator cubicle, use the sealed stifled group material of anti-condensation gas or separate the dew cotton by a large scale, not only extravagant material, dehumidification efficiency is not high, and the cost is great moreover, more importantly, general regulator cubicle passes through the lateral wall heat dissipation, and it will be unfavorable for the timely heat dissipation of regulator cubicle to arrange the material of preventing damp and hindering rust by a large scale, causes the. Therefore, the method for preventing the moisture and the rust of the invention arranges a plurality of rust-resisting membrane boxes on the side wall, and the arrangement positions and the number of the rust-resisting membrane boxes can be flexibly arranged according to the actual moisture condition, for example, the rust-resisting membrane boxes are arranged at the pipeline penetrating/penetrating positions, the gaps, the metal part centralization positions or special requirements.
The rust-resistant membrane box comprises a gas-phase rust inhibitor, a gas-phase rust-resistant membrane and a membrane box body. The gas-phase rust inhibitor comprises a rust inhibiting component, polyvinyl alcohol and a solvent, wherein the rust inhibiting component comprises aliphatic amino acid, organic amine, amino acid alkyl ester and benzoate, and the solvent is a mixed solvent of alcohol and water. The gas phase rust-resisting diaphragm comprises a substrate layer and a waterproof gas-resisting layer, wherein the substrate layer is a non-woven fabric coated with polyvinylidene fluoride, and the waterproof gas-resisting layer is a non-woven fabric with a microporous structure. The gas phase rust resisting diaphragm is arranged in the diaphragm box body, and the gas phase rust resisting agent is placed in the gas phase rust resisting diaphragm. The rust-resistant film box enables the gas-phase rust-resistant components in the box to volatilize slowly and uniformly, and supplements a protective layer for the metal in the electrical cabinet at any time, so that a long-term corrosion inhibition effect is achieved.
According to the characteristic that a metal wire head or a terminal in the electrical cabinet is generally fixed after being well arranged, the closed type rust resisting part comprises a strippable sealant which is hermetically wrapped on the surface of the exposed wire head or the terminal, so that the small-sized fixed electrical appliance device is prevented from being rusted. The peelable sealant is used for hermetically wrapping the metal wire head and the terminal in the electrical cabinet, is convenient to use, can be used for gluing the metal wire head and the terminal by using gluing tools such as a glue gun and the like, is simple and quick, and is peelable, so that the metal wire head and the terminal are convenient to maintain and replace. The sealant can pertinently and effectively prevent the metal wire head and the terminal from rusting, is suitable for the requirements of moisture resistance and rust resistance of small micro-area or volume, and has flexible use and low cost.
The PSC terminal sealant is a PSC terminal sealant, and comprises a component A (vinyl silicone oil and vinyl silicone resin), a component B (hydrogen-containing silicone oil and hydrogen-containing silicone resin), fluorine-containing silane, an organosilicon modified fluorine-containing acrylate copolymer, a reinforcing filler, a catalyst, a flame retardant and an inhibitor. The organic silicon modified fluorine-containing acrylate copolymer is a copolymer of an organic silicon monomer and perfluoroalkyl (methyl) ethyl acrylate. The PSC terminal sealant has the advantages of small using amount, condensation prevention, stripping, quick curing, flame retardance and insulation.
The intelligent humidity measuring and rust resisting part comprises an intelligent constant humidity sheet arranged on the inner wall of the electric cabinet, and the humidity in the electric cabinet is monitored in real time by utilizing the humidity absorption and humidity elimination performance of the intelligent constant humidity sheet. Preferably, the intelligent constant humidity sheet is arranged on the side wall in the electrical cabinet, can automatically absorb or release moisture in the air, and has an intelligent humidity adjusting function. When the humidity of the air in the electrical cabinet exceeds a certain limit, the intelligent constant humidity sheet starts to absorb the moisture in the air, so that the air is dried; when the humidity of the air in the electrical cabinet is lower than a certain limit, the intelligent constant humidity sheet starts to release the moisture of the intelligent constant humidity sheet, so that the air in the electrical cabinet is prevented from being too dry, and dangers such as static electricity and deflagration are prevented.
Preferably, when the humidity of the air in the electrical cabinet is greater than 50%, the intelligent constant humidity sheet starts to absorb the moisture in the air; when the humidity of the air in the electrical cabinet is lower than 30%, the intelligent constant humidity sheet starts to release moisture of the intelligent constant humidity sheet.
The method for preventing the moisture and the rust aims at the moisture and the rust prevention requirements of different parts and components of the electrical cabinet, and the moisture and the rust prevention materials with different forms and performances are matched to comprehensively treat the corrosion problem of the electrical cabinet. Specifically, for the bottom of the electrical cabinet with large moisture dissipation capacity, the key prevention and control part is provided, the gas phase rust resisting technology is utilized, the condensation-proof gas sealing and blocking material with good moisture-proof and rust-proof effects is used, the whole precast slab is arranged or cast, the air tightness is good, and the moisture dissipation is effectively blocked; for the electrical cabinet top plate with small moisture content and easy condensation and dripping, the water and rust prevention is needed, and the dew blocking cotton is used for blocking moisture and absorbing generated condensed water drops in time so as to prevent the internal short circuit of the electrical cabinet; for the cabinet side wall with smaller moisture content but larger area, the dual requirements of moisture resistance, rust resistance and ventilation and heat dissipation need to be considered, so that the use of materials with good air tightness is avoided, a gas phase rust resistance technology is utilized, the inventor creatively uses the rust resistance film box and the intelligent constant humidity sheet to actively control the humidity of the side wall, point-surface combination and key control can be realized, the application is flexible, and the moisture resistance and humidity control purpose without dead angles in all directions is finally realized by matching with the moisture resistance and rust resistance materials at the bottom and the top plate of the cabinet body. The moisture-proof and rust-proof method can prevent a large amount of external moisture from flowing in, open water cannot drop in the interior of the moisture-proof and rust-proof method, a healthy ecological circle is formed, the gas-phase rust-proof membrane box plays a role in moisture prevention and control, and meanwhile, the intelligent constant-humidity sheet is arranged to prevent moisture and rust at fixed points.
According to the method for preventing the moisture and rust at the bottom of the electrical cabinet by matching the anti-condensation gas-tight blocking component provided by the invention, the modified polyether polyol is used as a raw material, so that the mechanical property and the thermo-oxidative aging resistance of the modified polyether polyol are improved, the hydrophobicity is improved, the condensation is prevented from gathering and permeating on the anti-condensation gas-tight blocking component, and the anti-condensation effect is better played.
The invention also provides a passive moisture-proof and rust-proof electric cabinet, which adopts the moisture-proof and rust-proof method and comprises a cabinet body, an anti-condensation air-tight blocking material, anti-condensation cotton, a rust-proof film box, a peelable sealant and an intelligent constant humidity sheet, wherein the anti-condensation air-tight blocking material is arranged at the bottom of the cabinet body, the anti-condensation cotton is arranged on the top plate of the cabinet body, the rust-proof film box and the intelligent constant humidity sheet are arranged on the side wall of the cabinet body, and the peelable sealant is used for hermetically wrapping the metal wire head and the terminal in the cabinet body.
Drawings
Fig. 1 is a structural diagram of a group screen type electrical cabinet at a terminal of a three-remote station.
Fig. 2 is a structural diagram of a high-voltage ring network electrical cabinet.
In the attached figure, 1-side plate, 2-bottom plate, 3-top plate, 4-upright post, 5-display screen, 6-control panel assembly, 7-control panel, 8-line grounding facility, 9-DFC isolating cotton, 10-BBS anti-condensation air-tight blocking material, 11-wiring terminal, 12-rust-proof film box, 13-intelligent constant humidity sheet, 14-fuse, 15-current transformer and 16-bracket.
Detailed Description
Preparation example 1
Preparation of fluorine-containing benzenediol glycidyl ether:
1) dissolving 10 parts of 4-fluoro catechol in 50 parts of acetone, stirring until the 4-fluoro catechol is completely dissolved, adding 30 parts of epoxy chloropropane, and continuously stirring until the epoxy chloropropane is completely dissolved;
2) heating the mixture obtained in the step 1) to 80 ℃, dropwise adding 22 parts of NaOH solution with the concentration of 25 wt% under the stirring condition, and continuing to react for 1.5h at constant temperature after dropwise adding;
3) filtering the mixture obtained in the step 2), washing the precipitate at 80 ℃, and drying to obtain powdered fluorodiphenol-containing glycidyl ether.
Preparation of modified polyether polyol:
s1: dissolving 50 parts of polyether polyol BASF Pluracol 975 in 40 parts of deionized water, adding 0.3 part of catalyst triethylamine, and stirring until the mixture is uniform;
s2: heating the mixture system obtained in the step S1 to 100 ℃, and dropwise adding 10 parts of 4-fluoro catechol glycidyl ether prepared above under the condition of constant temperature stirring for reaction for 1.5 h;
s3: and (4) extracting the final mixture obtained in the step S2 by using 40 parts of chloroform, and removing the organic solvent chloroform by rotary evaporation to obtain the liquid modified polyether polyol.
Preparing a condensation gas preventing sealing and blocking material:
the component A comprises: 100 parts of the prepared liquid modified polyether polyol, 0.5-1.5 parts of deionized water, 35 parts of physical foaming agent monofluorodichloroethane, 1 part of triethylamine as a catalyst, 2 parts of dibutyltin dilaurate and 3 parts of chain extender triethanolamine;
and B component: 60 parts of polyisocyanate
N100, 40 parts of toluene diisocyanate;
t1: adding the raw materials in the component A into a reaction vessel, and stirring at the rotating speed of 200rpm to uniformly mix the raw materials;
t2: adding the vacuum defoamed component B into the mixture of the step T1 within 10s, and continuously stirring at the rotating speed of 300rpm for 10 s;
t3: pouring the mixture into a mould for foaming when the mixture in the step T2 is milky, and naturally curing for 72 hours after foaming is finished.
Preparation example 2
The procedure was as in preparation example 1, except that the modified polyether polyol was prepared in an amount of 30 parts by weight of polyether polyol BASF Pluracol 975.
Preparation example 3
The procedure was as in preparation example 1, except that the modified polyether polyol was prepared in an amount of 80 parts by weight of polyether polyol BASF Pluracol 975.
Preparation example 4
The procedure was as in preparation example 1, except that the modified polyether polyol was prepared in an amount of 120 parts of polyether polyol BASF Pluracol 975.
Preparation example 5
The rest of the process is the same as that of preparation example 1, except that in the preparation of the anti-condensation gas-tight seal blocking composition, polyisocyanate
The amount of N100 is 100 parts and the amount of diisocyanate is 0.
Preparation example 6
The rest of the process is the same as that of preparation example 1, except that in the preparation of the anti-condensation gas-tight seal blocking composition, polyisocyanate
The amount of N100 is 0 part and the amount of diisocyanate is 100 parts.
Preparation example 7
The process was the same as in preparation example 1, except that in the preparation of the fluorinated hydroquinone glycidyl ether, 15 parts of epichlorohydrin was used.
Preparation of comparative example 1
The procedure was as in preparation example 1, except that in the preparation of the anti-condensation gas-tight seal blocking composition, the polyether polyol was not modified and BASF Pluracol 975 was used.
The anti-condensation air-tight plugging compositions prepared in the above preparation examples and comparative examples were subjected to the following performance tests, and the results are shown in table 1.
And (3) performance testing:
compression performance: the compression performance test is carried out according to the standard GB/T8812-2008, the size of the sample band is 50mm multiplied by 50mm, and the compression speed is 5 mm/min.
Impact properties: the impact performance test was carried out with reference to the standard GB/T13525-1992, testing span 70mm and testing pendulum 5J, speed 12 mm/s.
Thermal oxidation aging: according to the standard GB/T3512-2001, a sample is placed in an electric heating constant-temperature air drying oven, the temperature is set to be 100 ℃, and the mechanical property retention rate of the sample is tested after aging for 72 hours.
Contact angle test: deionized water is used as test liquid, a static contact angle measuring instrument is used for measuring the contact angle of the polyurethane foam, the contact angle measuring range is 0-180 degrees, the precision is 0.5 degrees, 1pL of the test liquid is dripped on the surface of a sample during test, an image is immediately captured, a tangent line is taken for reading the contact angle, each sample is tested for 3 times, the difference value of each time is within 1 degree, and an average value is taken.
TABLE 1 comparison of the Properties of preparations 1 to 7 and preparation of comparative example 1
According to the invention, the polyether polyol is modified by using the epoxy chloropropane and the fluorine-containing benzenediol glycidyl ether generated by the fluorine-containing benzenediol, and the crosslinked polyurethane foam containing fluorine phenyl on the main chain is generated by adjusting the using amount of the polyether polyol and the using amount of the isocyanate, so that the condensation-preventing air-tight blocking material with excellent condensation resistance, mechanical property and thermo-oxidative aging resistance is obtained, the condensation can be effectively spun, and the condensation-preventing air-tight blocking material is gathered and permeated on the material and is durable.
Embodiment 1 group screen type three-remote station terminal electrical cabinet
The electrical cabinet structure of the group screen type three-remote station terminal of the embodiment is as shown in fig. 1, the group screen type three-remote station terminal is in a vertical cuboid box shape, the cabinet structure comprises a front door, a rear door, side plates 1, a bottom plate 2 and a top plate 3, stand columns 4 and angle steel are arranged in the cabinet body, multilayer laminate plates are fixed at different heights on the stand columns, display screens 5, control panel assemblies 6, control opening panels 7 and a power supply are arranged on the different laminate plates respectively, and a circuit grounding facility 8 is arranged on the bottom plate.
The inside of cabinet body roof 3 sets up waterproof rust portion that hinders, and DFC separates the cotton 9 of dew promptly, and DFC separates the cotton 9 tiling of dew at the lower surface of roof 3, and the moisture that the roof got into is followed in the separation to in time absorb the condensation that the roof produced. The upper surface of cabinet body bottom plate 2 uses BBS anti-condensation air seal block material 10, constitutes the gas phase and hinders the rust part, specifically is BBS-F type castables, and self-leveling forms the airtight stifled layer of one deck on bottom plate 2, prevents that a large amount of moisture from bottom plate 2 from getting into cabinet internal portion, and airtight shutoff layer on bottom plate 2 can be by oneself along the border levelling of line ground facility 8 to seal the periphery of line ground facility 8, prevent the moisture infiltration.
The control panel assembly 6 of the internal portion of cabinet and the circuit of controlling panel 7 all draw forth from the panel both sides, through binding post 11 connection power or circuit ground facility 8 on stand 4 or the angle steel, scribble strippable PSC terminal sealed glue on every binding post 11, prevent binding post corrosion, form closed rust portion that hinders.
The two side plates 1 at the lower part of the cabinet body are respectively provided with a rust-resistant film box 12 and an intelligent constant humidity sheet 13, and the rust-resistant film box 12 and the intelligent constant humidity sheet 13 are arranged on the side plates 1 between the upright posts. Because the display screen 5, the control panel assembly 6 and the control panel 7 are provided with small fans for continuously dissipating heat and dissipating moisture, the electrical cabinet of the embodiment also focuses on preventing and controlling moisture invading from the lower part and the bottom of the cabinet body, and therefore, the rust-resisting capsule box 12 and the intelligent constant humidity sheet 13 are arranged on the side plate below the control panel assembly 6 to regulate and control the humidity of the middle lower part of the cabinet body.
The anti-condensation gas sealing and blocking component material of the embodiment is the anti-condensation gas sealing and blocking component material prepared in preparation example 1.
The DFC exposure isolating cotton 9 of the embodiment comprises an elastic glass fiber grid plate, water absorbing cotton and water storing cotton, wherein the two sides of the elastic glass fiber grid plate are respectively bonded with one layer of water storing cotton, and the outer sides of the two sides of the water storing cotton are respectively bonded with one layer of water absorbing cotton. The water absorption cotton has hydrophilicity, water vapor is absorbed into the water absorption cotton, condensation is avoided, and the water absorption cotton is formed by coating hydrophilic materials on the water storage cotton. The water storage cotton stores the water vapor absorbed by the absorbent cotton inside, so that condensation and dripping are avoided when the water vapor is too much in rainy days, and the water storage cotton is made of super absorbent resin. The elastic glass fiber grid plate is formed by compositely weaving resin and glass fiber. In this example, commercially available DFC insulation cotton manufactured by Mitsui technology corporation (Beijing) was used.
The intelligent constant humidity sheet of this example was a dyrkeeper pdf3461KB moisture absorption sheet from guhe electrical power equipment corporation.
The rust resistant membrane cartridge of this example is referred to in applicant's prior application No. 201910622748.8. The rust-resistant membrane box comprises a gas-phase rust inhibitor, a gas-phase rust-resistant membrane and a membrane box body.
The gas phase rust inhibitor consists of 60 parts of rust inhibiting components, 15 parts of polyvinyl alcohol and 20 parts of solvent. Wherein the rust-resisting component comprises glutamic acid, triethanolamine, tert-butyl aminoacetate and sodium benzoate, and the weight ratio is 40:25:5: 15; the solvent is a mixed solvent of ethanol and water, and the weight ratio is 15: 85; the weight average molecular weight of the polyvinyl alcohol was 1000.
The preparation method of the gas phase rust inhibitor comprises the following steps:
(1) mixing 0.8mol of aminoacetic acid with 1.2mol of concentrated hydrochloric acid, reacting for 3 hours at 60 ℃ to obtain aminoacetic acid hydrochloride, adding 1.2mol of tertiary alcohol with 4 carbon atoms, introducing hydrogen chloride gas, carrying out esterification reaction for 3 hours at 70 ℃, filtering, washing and drying to obtain a pure product of tertiary butyl aminoacetate;
(2) weighing tert-butyl aminoacetate, adding the tert-butyl aminoacetate into ethanol, and stirring and mixing uniformly;
(3) adding polyvinyl alcohol, glutamic acid and sodium benzoate into water according to a certain proportion, stirring and mixing uniformly;
(4) mixing the mixture obtained in the step (1) and the step (2) until the mixture is uniform;
(5) and (4) weighing triethanolamine, adding the triethanolamine into the mixture obtained in the step (3), and mixing to finally obtain the gas-phase rust inhibitor.
The substrate layer of the gas phase rust-resisting diaphragm is a non-woven fabric coated with polyvinylidene fluoride, the pore diameter of the microporous structure of the waterproof gas-resisting diaphragm is 0.13 mu m, the porosity is 63.4%, the bubble point pressure is 17.5KPa, and the permeability of the gas phase rust-resisting component is 4.75g/m2D. The thickness of the gas phase rust-resisting diaphragm is 250 mu m, and the non-woven fabric is staple fiber.
The preparation method of the gas phase rust-resisting diaphragm comprises the following steps:
(1) dissolving 20 parts by weight of polyvinylidene fluoride in 50 parts by weight of dimethylformamide, stirring for 8 hours, heating in a water bath for 30 ℃, then forming a stable mixed solution in the water bath at constant temperature, adding 3 parts by weight of an additive, wherein the additive contains polyvinylpyrrolidone and 2-mercaptoethanol, the mass percentage of the 2-mercaptoethanol in the additive is 2%, standing for 5 hours, and completely defoaming to obtain a film liquid precursor;
(2) pouring the film liquid precursor on a non-woven fabric, scraping the film to form a film with the thickness of 250 mu m, soaking the film in flowing water with the water temperature of 20 ℃ and the water speed of 5m/min for 10min, rolling, soaking the film in water with the water temperature of 30 ℃ for 36 h, taking out the film, and airing the film for 3 days to obtain the gas phase rust-resistant diaphragm.
The capsule body is a 4 × 4 × 3cm cuboid, the top is open, 7g of rust inhibitor is added, and the area of the gas phase rust-resisting diaphragm is 10cm2。
The PSC terminal sealant of this embodiment is referenced to applicant's prior patent application No. 201910530134.7. The PSC terminal sealant comprises a component A and a component B, wherein A, B comprises the following components in parts by mass: the component A comprises 42 parts of vinyl silicone oil, 3 parts of MQ200 vinyl silicon resin, 3 parts of pentadecafluorononyl triethoxysilane, 2 parts of modified resin A12, 4 parts of white carbon black, 4 parts of aluminum hydroxide, 0.5 part of platinum catalyst and 0.5 part of ethynyl cyclohexanol; the component B comprises 10 parts of hydrogen-containing silicone oil, 2 parts of hydrogen-containing silicone resin, 3 parts of pentadecafluorononyl triethoxysilane, 2 parts of modified resin A12, 5 parts of superfine heavy calcium powder, 4 parts of aluminum hydroxide, 0.5 part of platinum catalyst and 0.5 part of ethynyl cyclohexanol.
The preparation method of the modified resin A12 comprises the following steps:
12.2g of organic silicon monomer A-174, 22g of deionized water, 13g of isopropanol, 3.5gOP-10 (alkylphenol polyoxyethylene ether-10), 3.7g of sodium dodecyl sulfate and 0.5g of potassium persulfate are added into a reactor, stirred, and a mixed solution of 13.4g of perfluoro dodecyl ethyl methacrylate dissolved in 50ml of toluene is slowly dripped in the reactor, the dripping is completed within 1 hour, and the mixture reacts at 90 ℃ for 6 hours to obtain viscous liquid, namely the organic silicon modified fluorine-containing acrylate copolymer (modified resin A12), wherein the weight average molecular weight is 6500 and the viscosity is 1100mPa.
The preparation method of the component A comprises the following steps:
(1) preheating internal mixer equipment to 70 ℃, adding vinyl silicone oil, MQ200 vinyl silicon resin, pentadecafluorononyl triethoxysilane and modified resin A12, and stirring uniformly;
(2) sequentially adding superfine heavy calcium powder and aluminum hydroxide, stirring in vacuum for 30min, grinding and dispersing the materials, and transferring to another internal mixer;
(3) adding platinum catalyst and ethynyl cyclohexanol, stirring for 30min, cooling, vacuum defoaming, and filling to obtain component A.
The preparation method of the component B comprises the following steps:
(1) preheating internal mixer equipment to 70 ℃, adding hydrogen-containing silicone oil, hydrogen-containing silicone resin, pentadecafluorononyl triethoxysilane and modified resin A12, and stirring uniformly;
(2) sequentially adding white carbon black and aluminum hydroxide, stirring for 30min in vacuum, grinding and dispersing the materials, and transferring to another internal mixer;
(3) adding platinum catalyst and ethynyl cyclohexanol, stirring for 30min, cooling, vacuum defoaming, and filling to obtain component B.
Example 2
The structure of the electrical cabinet of the group-screen type three-remote station terminal in this embodiment is the same as that in embodiment 1, the dew condensation prevention air-tight blocking material used in this embodiment is the dew condensation prevention air-tight blocking material prepared in preparation example 2, and the DFC dew isolation cotton, the intelligent constant humidity sheet, the rust-resistant film box and the PSC terminal sealant used in this embodiment are the same as those in embodiment 1.
Example 3
The structure of the electrical cabinet of the group-screen type three-remote station terminal in this embodiment is the same as that in embodiment 1, the dew condensation prevention air-tight blocking material used in this embodiment is the dew condensation prevention air-tight blocking material prepared in preparation example 3, and the DFC dew isolation cotton, the intelligent constant humidity sheet, the rust-resistant film box and the PSC terminal sealant used in this embodiment are the same as those in embodiment 1.
Example 4
The structure of the electrical cabinet of the group-screen type three-remote station terminal in this embodiment is the same as that in embodiment 1, the dew condensation prevention air-tight blocking material used in this embodiment is the dew condensation prevention air-tight blocking material prepared in preparation example 4, and the DFC dew isolation cotton, the intelligent constant humidity sheet, the rust-resistant film box and the PSC terminal sealant used in this embodiment are the same as those in embodiment 1.
Comparative example 1
The structure of the electrical cabinet of the group-screen type three-remote station terminal of the comparative example is the same as that of the embodiment 1, the condensation-proof air-tight blocking material used in the embodiment is used for preparing the condensation-proof air-tight blocking material prepared in the comparative example 1, and the DFC (distributed feed control) dew-proof cotton, the intelligent constant humidity sheet, the rust-resistant film box and the PSC (Pre-stressed concrete) terminal sealant used in the embodiment are the same as those in the embodiment 1.
Table 2 comparison of moisture absorption properties of examples 1 to 4 and comparative example 1
The anti-condensation gas sealing and blocking component materials prepared in preparation examples 1-4 are respectively used in examples 1-4, the anti-condensation gas sealing and blocking component material prepared in comparative example 1 is used in comparative example 1, and due to the difference of hydrophobicity and thermal oxygen aging resistance of the anti-condensation gas sealing and blocking component materials of different preparation examples, the moisture absorption rate of examples 1-4 after 3 days is 70% -84%, the moisture absorption effect is good, the moisture absorption rate after 180 days is 65% -79%, and the retention effect is good. The condensation gas preventing sealing and blocking material of the comparative example 1 uses unmodified polyether polyol, has poor thermal oxidation aging resistance, is hydrophilic, has poor moisture absorption performance and retention performance after use, and increases the moisture absorption burden of other moisture-proof and rust-proof components.
The high-voltage ring network electrical cabinet structure of this embodiment is as shown in fig. 2, and the high-voltage ring network electrical cabinet is vertical cuboid box-type shape, and the cabinet body structure includes qianmen, back door, curb plate 1, bottom plate 2 and roof 3, and the internal portion of cabinet is equipped with load switch, fuse 14, current transformer 15 and support 16.
The inside of cabinet body roof 3 sets up DFC and separates to reveal cotton 9, and DFC separates to reveal cotton 9 tiling at the lower surface of roof 3, and the moisture of roof entering is followed in the separation to in time absorb the condensation that the roof produced. The BBS anti-condensation air sealing and blocking material 10, particularly BBS-10 type castable, is used on the upper surface of the cabinet body bottom plate 2, and a layer of air sealing and blocking layer is formed on the bottom plate 2 to prevent a large amount of moisture from entering the cabinet body from the bottom plate.
Every binding post 11 of the internal portion of cabinet coats the sealed glue of strippable PSC terminal, prevents the corrosion of binding post, prevents that line short circuit and personnel from electrocuteeing simultaneously.
The left side plate at the lower part of the cabinet body is provided with a rust-resistant film box 12, the right side plate is provided with an intelligent constant humidity sheet 13, and the humidity of the middle lower part of the cabinet body is regulated and controlled. Since the lower space of the cabinet is large and moisture is easy to gather, the electrical cabinet of the embodiment also focuses on preventing and controlling moisture invading from the lower part and the bottom of the cabinet.
The anti-condensation air-tight blocking material, the DFC dew-isolating cotton, the intelligent constant humidity sheet, the rust-resisting film box and the PSC terminal sealant of the embodiment are the same as those of the embodiment 1.
Claims (9)
1. A method for preventing moisture and rust of an electrical cabinet from being passive is characterized in that the method for preventing moisture and rust combines gas phase rust prevention, water and rust prevention, closed rust prevention and intelligent moisture and rust measurement, wherein the gas phase rust prevention part in the method comprises the steps of arranging a condensation-proof gas sealing and blocking material at the bottom in the electrical cabinet and arranging a rust prevention film box on the inner side wall of the electrical cabinet to prevent external moisture from flowing in; the waterproof and rust-resistant part comprises a dew isolating cotton arranged at the top in the electrical cabinet to prevent the top of the cabinet from dripping; the closed type rust-resisting part comprises a strippable sealant which is hermetically wrapped on the surface of an exposed wire end or a terminal so as to prevent the small-sized fixed electric appliance device from being rusted; the intelligent humidity measuring and rust resisting part comprises an intelligent constant humidity sheet arranged on the inner wall of the electric cabinet, and the humidity in the electric cabinet is monitored in real time by utilizing the humidity absorption and humidity elimination performance of the intelligent constant humidity sheet;
the form of the anti-condensation air sealing and blocking component is selected from precast slabs or castable;
the dew isolating cotton is of a multilayer structure and comprises an elastic glass fiber grid plate, water absorbing cotton and water storing cotton, wherein one layer of water storing cotton is respectively bonded on two sides of the elastic glass fiber grid plate, and one layer of water absorbing cotton is respectively bonded on the outer sides of the water storing cotton on the two sides;
the rust-resistant membrane box comprises a gas-phase rust inhibitor, a gas-phase rust-resistant membrane and a membrane box body;
the anti-condensation air-tight blocking component material comprises A, B bi-components, wherein the component A comprises 100 parts by weight of modified polyether polyol, 0.5-1.5 parts by weight of water, 20-40 parts by weight of physical foaming agent, 1-3 parts by weight of catalyst and 1-3 parts by weight of chain extender, the component B comprises 60-100 parts by weight of polyisocyanate and 0-40 parts by weight of diisocyanate, and the modified polyether polyol is obtained by reacting and modifying fluorine-containing benzenediol glycidyl ether and polyether polyol.
2. The method for preventing moisture and rust according to claim 1, wherein the fluorobenzene diol-containing glycidyl ether is prepared by reacting fluorine-containing benzenediol and epichlorohydrin in a weight ratio of 1: 1.5-3;
the fluorobenzene-containing diphenol is selected from at least one of 3-fluoro catechol, 4-fluoro-1, 2 benzenediol, 2-fluoro-1, 3 benzenediol, 5-fluoro resorcinol and 3-fluoro hydroquinone.
3. The method of claim 2, wherein the fluorophenol-containing diglycidyl ether is prepared by a process comprising the steps of:
1) dissolving fluorine-containing benzenediol in an organic solvent, stirring until the fluorine-containing benzenediol is completely dissolved, adding epoxy chloropropane, and continuously stirring until the epoxy chloropropane is completely dissolved;
2) heating the mixture obtained in the step 1), heating, dripping NaOH solution under the stirring condition, and continuing constant-temperature reaction after dripping;
3) filtering the mixture obtained in the step 2), washing the precipitate with hot water, and drying to obtain the fluorine-containing benzenediol glycidyl ether.
4. The method of claim 3, wherein the polyether polyol is a primary hydroxyl terminated polyether polyol having a hydroxyl functionality of 3-6 and a number average molecular weight of 400-; the weight ratio of the polyether polyol to the fluorobenzene diphenol-containing glycidyl ether is 5-10: 1;
the preparation method of the modified polyether polyol comprises the following steps:
s1: dissolving polyether glycol in water, adding a catalyst, and stirring uniformly;
s2: heating the mixture system obtained in the step S1 to increase the temperature, and dropwise adding the fluorobenzenediol-containing glycidyl ether to react under the condition of constant-temperature stirring;
s3: and (4) extracting the final mixture obtained in the step S2 by using an organic solvent, and removing the organic solvent by rotary evaporation to obtain the liquid modified polyether polyol.
5. The method of claim 4, wherein the polyisocyanate comprises at least one of an aliphatic polyisocyanate and an aromatic polyisocyanate, and the polyisocyanate has a-NCO content of 5 to 20 percent and is selected from at least one of Desmodur T ®, HL, IL, or Desmodur N100, N75, N3200, N3400, N3600, N3800; the diisocyanate is at least one selected from toluene diisocyanate, diphenylmethane diisocyanate and 1, 6-hexamethylene diisocyanate.
6. The method for preventing moisture and rust according to claim 5, wherein the preparation method of the anti-condensation air-tight sealing and blocking material comprises the following steps:
t1: adding the raw materials in the component A into a reaction container, and stirring to uniformly mix the raw materials;
t2: adding the vacuum defoamed B component to the mixture obtained in the step T1 while keeping stirring;
t3: pouring the mixture obtained in the step T2 into a mould to foam when the mixture reaches a milky white state, and curing in a natural state after the foaming is finished.
7. The method of claim 1, wherein the anti-dewing and anti-rusting material is in a prefabricated plate form when the bottom of the electrical cabinet is a whole plate.
8. The method of claim 1, wherein when the electrical cabinet is provided with a hole at the bottom, the anti-dewing gas sealing and blocking component is in a combination form of a precast slab and a castable material, or in a form of a castable material.
9. The method of claim 1, wherein the rust resistant capsule comprises a vapor phase rust inhibitor and a vapor phase rust resistant membrane within a capsule body; the intelligent constant humidity sheet can absorb and release moisture in air and has an intelligent humidity regulating function; the peelable sealant is a peelable PSC terminal sealant.
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