CN116365376A - Outdoor ring main unit rust-proof and condensation-proof method - Google Patents

Abstract

The invention provides an anti-rust anti-condensation method for a ring main unit, which combines vapor phase rust resistance, waterproof rust resistance, closed rust resistance and intelligent wet measurement rust resistance, and performs omnibearing rust resistance aiming at different characteristics of various electric devices in the electric cabinet to form a healthy anti-rust ring main unit ecological ring with long service life. The gas-phase rust-resisting part in the method comprises the steps of arranging a condensation-preventing airtight plugging component at the inner bottom of the ring main unit and arranging a rust-resisting membrane box at the inner side wall of the ring main unit, so as to prevent external moisture from entering; the waterproof rust-resistant part comprises a dew-proof cotton arranged at the inner top of the ring main unit to prevent the water on the top of the ring main unit from dripping; the closed rust-resistant part comprises a strippable sealant which is tightly wrapped on the surface of the exposed wire end or the terminal, so that the small-sized fixed electrical device is prevented from being corroded.

Description

Outdoor ring main unit rust-proof and condensation-proof method

Technical Field

The invention belongs to the technical field of rust prevention and condensation prevention of electric appliances, and particularly relates to a passive rust prevention and condensation prevention method for a ring main unit.

Background

With the development of modern electrification technology, integration and intensification of electric appliances become 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 Ring Main Unit (Ring Main Unit) is a group of power transmission and distribution electrical equipment, and the core part of the Ring Main Unit adopts a load switch and a fuse, has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like, and is widely applied to power distribution stations and box-type substations of load centers such as urban residential communities, high-rise buildings, large public buildings, factory enterprises and the like. The inside components and parts are mostly made of metal, and because the service environments of the ring main units in different industries are different, the climate conditions in each place are also different, and the inside and the outside of the ring main units are easy to be corroded by moisture, so that corrosion is caused, the service lives of the ring main units and the inside components are seriously influenced, and the use of the whole electrical system is further influenced.

Because the ring main unit is internally provided with a large number of independent fine metal components, the ring main unit is complex in structure, high in operation frequency and frequent in replacement, the rust and condensation prevention treatment is difficult to be carried out on each metal component by a person skilled in the art, the workload is large, the efficiency is low, and the treatment effect is poor. In addition, because the environment and climate of the ring main unit are different, the difficulty of rust prevention and condensation prevention is increased. At present, a common means is to dehumidify the ring main unit by using a dehumidifier, so that not only is the power consumption increased, but also the volume of the ring main unit and the electric operation risk are increased. Therefore, the technology aiming at the ring main unit field with complex and precise structure lacks a complete set of technology aiming at a large number of fine metal components and complicated rust-proof anti-condensation requirements, and meanwhile, the energy consumption and equipment operation and maintenance risks can be reduced.

At present, a new method for preventing the ring main unit from faults exists. For example, in CN202011608162.5, a method of establishing a control system by an information module is adopted for ring main unit fault prevention, and data in the ring main unit is fed back in real time. The technical problems that the efficiency is low and the faults cannot be repaired in time due to the fact that a manual mode is adopted to detect the fault condition in the related technology are solved. In terms of reducing failure rate, a more detailed ring main unit design is needed.

Disclosure of Invention

In order to solve the problems, the invention provides an anti-rust and anti-condensation method for a ring main unit, which combines vapor phase rust resistance, waterproof rust resistance, closed rust resistance and intelligent wet measurement rust resistance, and performs omnibearing rust resistance aiming at different characteristics of various electric devices in an electric cabinet to form a healthy anti-rust ring main unit ecological ring with long service life. The gas-phase rust-resisting part in the method comprises the steps of arranging a condensation-preventing airtight plugging component at the inner bottom of the ring main unit and arranging a rust-resisting membrane box at the inner side wall of the ring main unit, so as to prevent external moisture from entering; the waterproof rust-resistant part comprises a dew-proof cotton arranged at the inner top of the ring main unit to prevent the water on the top of the ring main unit from dripping; the closed rust-resistant part comprises a strippable sealant which is tightly wrapped on the surface of the exposed wire end or the terminal, so that the small-sized fixed electrical device is prevented from being corroded.

The method for preventing rust and condensation is characterized in that different rust and condensation prevention components are matched according to the characteristics of different positions and electric devices in a ring main unit and the requirements of dampproofing and rust resistance, the passive rust and condensation prevention components of the anti-condensation airtight plugging component, the anti-condensation cotton and the strippable sealant are organically combined with the rust and condensation prevention components of the rust prevention film box, and a whole set of rust and condensation prevention technical scheme is formed according to the humidity characteristics of different moisture sources of the ring main unit. The rust-proof and condensation-proof material or component used in the invention does not need a power supply or external power equipment, and runs by virtue of the rust-proof and condensation-proof function of the material, thereby realizing passivation.

The bottom of the ring main unit is provided with the anti-condensation airtight blocking component which is an important part of gas phase rust resistance, and the form of the anti-condensation airtight blocking component is selected from precast slabs or castable. In actual use, the environment of the bottom of the ring main unit is most humid, the temperature is low, the humidity is high, the ventilation condition is poor, 80-85% of moisture enters the ring main unit from the bottom of the ring main unit, particularly, holes are formed in the bottom of the ring main unit for pipelines to enter and exit the ring main unit body, the moisture is easier to enter the ring main unit from the holes, and the practice proves that the corrosion of the bottom or the bottom plate of the ring main unit is more serious than other parts and the speed is higher. Therefore, the bottom of the ring main unit is the key part of the ring main unit for rust prevention and condensation prevention. The anti-condensation airtight plugging composition is used for plugging and blocking the diffusion of moisture and humidity at the bottom of the cabinet body, so that the corrosion of the ring main unit is restrained from the source, and the anti-condensation airtight plugging composition is a key part of the anti-rust anti-condensation method.

Preferably, when the bottom of the ring main unit is not provided with pipeline holes, but is provided with integral plates, the anti-condensation airtight sealing material is in a prefabricated plate form, and the anti-condensation airtight sealing material is convenient to install and maintain and can block the moisture diffused at the bottom of the cabinet body integrally. Preferably, when the bottom of the cabinet body is provided with holes, the anti-condensation airtight sealing component is in a combined form of a precast slab and castable, or in a castable form, and can tightly seal the holes and gaps between the bottom plate and the side wall of the cabinet body according to different shapes of the bottom plate, so that moisture is comprehensively prevented from entering the equipment.

The anti-condensation airtight plugging composition comprises A, B two 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 benzene diphenol glycidyl ether and polyether polyol.

According to the invention, the polyether polyol is modified by using the fluorinated benzenediol glycidyl ether generated by epoxy chloropropane and fluorinated benzenediol, and the polyurethane foam with a crosslinked reticular structure and fluorinated benzene chain segments on the main chain is generated by adjusting the dosage, the proportion and the reaction condition of the epoxy chloropropane and the fluorinated benzenediol, and meanwhile, the hydrophobic property, the mechanical property and the thermo-oxidative aging resistance of the anti-condensation airtight blocking component are improved.

The waterproof rust-resistant part comprises a dew-proof cotton arranged at the inner top of the ring main unit, and is used for preventing water drops on the top of the ring main unit. In actual use, little part moisture or humidity gets into from looped netowrk cabinet top, and in addition, when the heat that gives off when the looped netowrk cabinet operation rose to the top, meet cold condensation easily, when the steam is accumulated more, the water droplet can fall into the looped netowrk cabinet, not only can rust inside components and parts, more serious can lead to circuit short circuit or open circuit, is very big potential safety hazard. Therefore, the rust-proof condensation-proof method uses the dew-proof cotton to cover the inner part of the top plate of the ring main unit, thereby not only blocking moisture invaded from the outer part of the ring main unit, but also absorbing and preventing condensed water in the inner part of the ring main unit from dripping. The anti-leakage cotton is convenient to install, and holes or pipelines of the top plate of the ring main unit can be conveniently perforated in an adjustable size.

The anti-dew cotton is of a multi-layer structure and comprises an elastic glass fiber grid plate, water absorbing cotton and water storing cotton, wherein 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 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 looped netowrk cabinet sets up a plurality of hinder the rust membrane case, is the gaseous phase and hinders the important part that rust, and little part moisture or moisture get into from the looped netowrk cabinet side wall, nevertheless owing to the lateral wall area of some looped netowrks is great, especially vertical looped netowrk cabinet, large tracts of land uses and prevents the airtight shutoff group material of condensation or separate the cotton, not only extravagant material, dehumidification efficiency is not high, and the cost is great moreover, more importantly, general looped netowrk cabinet is through the lateral wall heat dissipation, and the large tracts of land arranges rust-proof condensation-proof material will be unfavorable for the timely heat dissipation of looped netowrk cabinet, causes the potential safety hazard. Therefore, the method for preventing rust and condensation is characterized in that the side wall is provided with a plurality of rust-resisting capsules, the arrangement positions and the number can be flexibly set according to the actual wet condition, for example, the rust-resisting capsules are arranged at the pipeline penetrating/penetrating positions, the gaps, the metal part concentration positions or the positions with special requirements.

The rust-resistant film box comprises a gas-phase rust inhibitor, a gas-phase rust-resistant film and a film box body. The gas-phase rust inhibitor comprises a rust inhibitor component, polyvinyl alcohol and a solvent, wherein the rust inhibitor 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-resistant membrane comprises a substrate layer and a waterproof gas-resistant layer, wherein the substrate layer is non-woven fabric coated with polyvinylidene fluoride, and the waterproof gas-resistant layer is non-woven fabric with a micropore structure. The gas-phase rust-resisting membrane is arranged in the membrane box body, and the gas-phase rust inhibitor is placed in the gas-phase rust-resisting membrane. The rust-resistant film box enables the volatilization of the gas-phase rust-resistant components inside to be slow and uniform, supplements a protective layer for the metal in the ring main unit at any time, and achieves a long-term corrosion inhibition effect.

According to the characteristic that the metal wire ends or terminals in the ring main unit are generally fixed after being arranged, the closed rust-resistant part comprises a strippable sealant which is wrapped on the surface of the exposed wire ends or terminals in a sealing way, so that the small-sized fixed electrical appliance is prevented from being corroded. The strippable sealant is used for hermetically wrapping the metal wire heads and the terminals in the ring main unit, is convenient to use, can use a glue gun and other glue spraying tools to glue the metal wire heads and the terminals, is simple and quick, is strippable, and is convenient to maintain and replace the metal wire heads and the terminals. The sealant can pointedly and effectively prevent the metal wire ends and the terminals from being rusted, is suitable for the rust and condensation prevention requirements of small micro-area or volume, and has flexible use and low cost.

The terminal sealant is PSC terminal sealant, and the PSC terminal sealant comprises an A component (vinyl silicone oil and vinyl silicone resin), a B component (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 organosilicon modified fluorine-containing acrylate copolymer is a copolymer of an organosilicon monomer and perfluoroalkyl (methyl) ethyl acrylate. The PSC terminal sealant has the advantages of small dosage, condensation prevention, peelability, quick solidification, flame retardance and insulation.

The anti-condensation airtight plugging composition provided by the invention is matched with the ring main unit bottom rust-proof anti-condensation method, so that the mechanical property and the thermo-oxidative aging resistance of the anti-condensation airtight plugging composition are improved, meanwhile, the hydrophobicity is improved, the condensation is prevented from gathering and penetrating on the anti-condensation airtight plugging composition, and the anti-condensation effect is better exerted.

The invention also provides a passive rust-proof condensation-proof ring main unit, which adopts the rust-proof condensation-proof method and comprises a main unit body, condensation-proof airtight plugging materials, dew-proof cotton, rust-proof membrane boxes, strippable sealant and intelligent constant humidity sheets. The bottom of the cabinet body is provided with the anti-condensation airtight plugging material, the top plate of the cabinet body is provided with the dew-isolation cotton, the side wall of the cabinet body is provided with a plurality of rust-resistant films and intelligent constant humidity sheets, and the strippable sealant is used for sealing and wrapping metal wire heads and terminals in the cabinet body.

Drawings

Fig. 1 is an enlarged schematic view of a structural point according to an embodiment of the present invention.

In the attached drawings, a 1-side plate, a 2-bottom plate, a 3-top plate, 4-DFC dew-proof cotton, 5-BBS anti-condensation airtight plugging component, 6-wiring terminals, 7-rust-proof membrane boxes, 8-fuses, 9-current transformers and 10-brackets are arranged.

Detailed Description

The method for preventing rust and condensation of the ring main unit provided by the invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

The high-voltage loop network electrical cabinet structure of this embodiment is as shown in fig. 1, and the high-voltage loop network electrical cabinet is the box shape of vertical cuboid, and cabinet body structure includes qianmen, back door, curb plate 1, bottom plate 2 and roof 3, and the cabinet is internal to be equipped with load switch, fuse 8, current transformer 9 and support 10.

The inside of cabinet roof 3 sets up DFC and separates dew cotton 4, and DFC separates dew cotton 4 tiling at the lower surface of roof 3, separates the moisture that gets into from the roof to in time absorb the condensation that the roof produced. The upper surface of cabinet body bottom plate 2 uses BBS to prevent that condensation airtight shutoff from the castable form of material 5, forms one deck airtight shutoff layer on bottom plate 2, prevents that a large amount of moisture from getting into cabinet internal portion from the bottom plate, constitutes vapor phase rust resistant part, specifically BBS castable, forms one deck airtight shutoff layer from the level on bottom plate 2, prevents that a large amount of moisture from getting into cabinet internal portion from bottom plate 2, and airtight shutoff layer on the bottom plate 2 can be by oneself along the border levelling of circuit ground facility to seal circuit ground facility's periphery, prevent moisture infiltration.

Each connecting terminal 6 in the cabinet body is coated with strippable PSC terminal sealant to prevent the corrosion of the connecting terminal and simultaneously prevent the short circuit of the line and the electric shock of personnel.

A rust-resisting film box 7 is arranged on the left side plate of the lower part of the cabinet body. Since the space of the lower part of the cabinet body is large, moisture is easily collected, the electrical cabinet of the embodiment is also important to prevent and control moisture from entering from the lower part and the bottom of the cabinet body.

The DFC dew-isolating cotton 4 of this embodiment includes an elastic glass fiber mesh plate, water absorbing cotton and water storing cotton, wherein two sides of the elastic glass fiber mesh plate are respectively bonded with a layer of water storing cotton, and two sides of the water storing cotton are respectively bonded with a layer of water absorbing cotton. The water-absorbing cotton has hydrophilicity, vapor is absorbed into the water-absorbing cotton to avoid condensation, and the water-absorbing cotton is formed by coating hydrophilic materials on the water-storing cotton. The water storage cotton stores the water vapor absorbed by the water absorption cotton in the interior, so that condensation and dripping are avoided when the water vapor is too much in overcast and rainy days, and the water storage cotton is formed by the high-hydroscopicity resin. The elastic glass fiber grid plate is formed by compounding and braiding resin and glass fiber.

The anti-condensation airtight plugging composition 5 comprises A, B two 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.

The PSC terminal sealant of this embodiment includes an a-component and a B-component. The component A comprises 42 parts of vinyl silicone oil, 3 parts of MQ200 vinyl silicone 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 pentadecafluorononyltriethoxysilane, 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 rust-resistant film box of the embodiment comprises a gas-phase rust inhibitor, a gas-phase rust-resistant film and a film box body, wherein the gas-phase rust-resistant film is arranged in the film box body, and the gas-phase rust inhibitor is placed in the gas-phase rust-resistant film. The capsule body is a cuboid with the length of 4 multiplied by 3cm, the top of the capsule body is opened, 6g of gas phase rust inhibitor is added, and the area of the gas phase rust inhibitor membrane is 8cm < 2 >. The base layer of the gas phase rust-resistant membrane is non-woven fabric coated with polyvinylidene fluoride, the aperture of the microporous structure of the waterproof gas-resistant layer is 0.13 mu m, the porosity is 63.4%, the thickness of the gas phase rust-resistant membrane is 250 mu m, and the non-woven fabric is a short fiber. The gas phase rust inhibitor consists of 60 parts of rust inhibitor components, 15 parts of polyvinyl alcohol and 20 parts of solvent. Wherein the rust-resistant component comprises glutamic acid, triethanolamine, tertiary butyl aminoacetate and sodium benzoate; the solvent is a mixed solvent of ethanol and water.

The foregoing is a further detailed description of the present application in connection with the specific preferred embodiments, and it is not intended that the practice of the present application be limited to such description. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims (10)

1. The passive rust-proof condensation-proof method for the ring main unit is characterized by combining gas phase rust resistance, water resistance, closed rust resistance and intelligent wet measurement rust resistance, wherein the gas phase rust resistance part in the method comprises the steps of arranging a condensation-proof airtight plugging material at the inner bottom of the ring main unit and arranging a rust-proof film box at the inner side wall of the ring main unit to prevent external moisture from rushing in; the waterproof rust-resistant part comprises a dew-proof cotton arranged at the inner top of the ring main unit to prevent the water on the top of the ring main unit from dripping; the closed rust-resistant part comprises a strippable sealant which is tightly wrapped on the surface of the exposed wire end or the terminal, so that the small-sized fixed electrical device is prevented from being corroded.

2. The method for preventing rust and condensation according to claim 1, wherein the ring main unit bottom plate and the places with gaps are poured with the anti-condensation airtight blocking material, and the anti-condensation airtight blocking material is solidified after foaming, so that the rigid foam material with the closed porosity of more than 92% is obtained.

3. The method for preventing rust and condensation according to claim 2, wherein the thickness of the anti-condensation airtight plugging composition after curing is more than 10 cm.

4. The method for preventing rust and condensation according to claim 3, wherein the construction method is pouring after the components are fully mixed.

5. The construction method according to claim 4, comprising:

firstly, plugging holes by using red mud and other solids;

and (3) longitudinally paving a prefabricated plate with the height of 10cm on the base layer of the bottom plate, and dividing the prefabricated plate into a plurality of pouring blocks.

6. The method of claim 1, wherein the anti-rust and anti-condensation airtight plugging composition is in a form selected from precast slabs and castable materials.

7. The method for preventing rust and condensation according to claim 6, wherein when the bottom of the ring main unit is a whole plate, the anti-condensation airtight sealing component is in a prefabricated plate form.

8. The method for preventing rust and condensation according to claim 7, wherein when the bottom of the ring main unit is provided with holes, the anti-condensation airtight plugging composition is in a combination form of a prefabricated plate and a castable or in a castable form.

9. The method for preventing rust and condensation according to claim 1, wherein the dew-proof cotton is of a multi-layer structure and comprises an elastic glass fiber grid plate, water-absorbing cotton and water-storing cotton, wherein 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 rust-resistant film box comprises a gas-phase rust inhibitor and a gas-phase rust-resistant film in the film box body; the intelligent constant humidity sheet can absorb and release moisture in air and has an intelligent humidity adjusting function; the peelable sealant is a peelable PSC terminal sealant.

10. The method for preventing rust and condensation according to claim 1, wherein the rust-resistant film box comprises a magic box body, a gas-phase rust inhibitor and a gas-phase rust inhibitor film, wherein the gas-phase rust inhibitor film is arranged inside the film box body, and the gas-phase rust inhibitor is placed inside the gas-phase rust inhibitor film.

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