CN110589263B - Composite carbon steel floating disc and preparation method thereof - Google Patents
Composite carbon steel floating disc and preparation method thereof Download PDFInfo
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- CN110589263B CN110589263B CN201910964027.5A CN201910964027A CN110589263B CN 110589263 B CN110589263 B CN 110589263B CN 201910964027 A CN201910964027 A CN 201910964027A CN 110589263 B CN110589263 B CN 110589263B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a composite carbon steel floating disc and a preparation method thereof, wherein a conventional carbon steel floating disc is manufactured in a floating roof oil tank, then the immersion part of the carbon steel floating disc is constructed, the inner wall of a through hole is sequentially coated and/or paved with a special primer layer A and a prepreg layer of a photo-curing glass fiber reinforced plastic material from inside to outside, the tail end of the through hole and the surface layer of a bottom plate are adhered with an annular reinforcing ring, and the inner circle of the reinforcing ring is right against the inner diameter of the through hole; the side wall and the bottom plate are sequentially coated and/or paved with a special primer layer B, a prepreg layer of a first layer of photo-cured glass fiber reinforced plastic material, a prepreg layer of a second layer of photo-cured glass fiber reinforced plastic material and a conductive layer from inside to outside. According to the invention, the glass fiber reinforced plastic reinforcing layer is constructed on the lower surface of the carbon steel floating disc, so that the service life of the carbon steel floating disc can be greatly prolonged, and the running safety of the floating disc is improved; the novel photo-curing glass fiber reinforced plastic prepreg construction process is adopted as the glass fiber reinforced plastic main body of the composite floating disc, so that the construction speed can be greatly improved, and the construction difficulty is reduced.
Description
Technical Field
The invention relates to a composite carbon steel floating disc and a preparation method thereof.
Background
With the large-scale of oil storage tanks and oil reservoirs, the requirements on floating trays of floating roof oil storage tanks are increasing. In recent years, accidents of lightning strike and fire of a plurality of floating roof storage tanks occur, and the most serious accidents are lightning strike explosion accidents of inner floating roof storage tanks, wherein many of the accidents of the inner floating roof storage tanks are caused by inaccurate sealing of floating plates, explosive gas exists in the storage tanks, and the oil gas concentration exceeds the standard near an exhaust port of the storage tanks. Meanwhile, the floating disc is not tightly sealed, so that a large amount of hydrocarbon gas volatilizes, the problem of environmental pollution is outstanding, and the air quality is seriously influenced; the volatilization of a large amount of oil gas also causes the loss of oil products, and the economic benefit is greatly influenced.
At present, a plurality of novel floating plates are arranged in the internal floating roof oil tank in China, including a full-liquid-receiving spliced floating plate, a full-liquid-receiving welded floating plate, a glass fiber reinforced plastic floating plate and the like. With the implementation of the latest fire protection standard GB50160 in China, carbon steel floating plates are preferentially adopted for the storage tanks exceeding 5000m < 3 >. Carbon steel floating plates have been used for a long time, and many problems have occurred. For example, a large oil storage and transportation center analyzes serious accidents of a 12-jack-up outer floating roof carbon steel floating disc in recent years, 1a tank body is deformed to cause, 1 the floating disc slide is damaged to cause sinking disc, 1 oil is leaked to cause sinking disc, 4 central drainage is unsmooth to cause oil inflow, 2 the floating disc is corroded, and 4 the floating disc is corroded to cause oil leakage to generate danger. It can be seen that the accident rate due to corrosion is highest in large outer floating roof steel floating pans. In the inner floating roof carbon steel floating plate, accidents caused by corrosion are higher than those of the outer floating roof due to the unchanged inspection.
The crude oil contains a large amount of ions and molecules which affect corrosion, such as CL-, HCO3, SO4, H2S, CO and the like, and the ions or the molecules can be subjected to electrochemical reaction with iron, and moreover, because of frequent operation of a hand valve, sand and stone contained in the oil can damage an anti-corrosion layer when scouring the bottom of the floating disc, and the corrosion is aggravated, and the floating disc cannot use measures such as anode protection and the like, only can rely on corrosion prevention, and once the anti-corrosion layer is damaged, serious corrosion can be quickly generated.
At present, for strengthening the corrosion resistance of a storage tank, a plurality of novel storage tanks are appeared, wherein a glass fiber reinforced plastic and carbon steel composite storage tank (double-wall tank) is greatly applied, namely, a glass fiber reinforced plastic corrosion resistance layer is added on the inner wall of the original carbon steel storage tank, so that the corrosion resistance of the storage tank is greatly improved, and the service life of the storage tank is prolonged. The technology is widely popularized and applied.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the composite carbon steel floating disc and the preparation method thereof, which can accelerate the construction speed, reduce the site construction amount, reduce the construction difficulty and have good designability; a glass fiber reinforced plastic reinforcing layer is constructed on the lower surface of the carbon steel floating disc, so that the service life of the carbon steel floating disc can be greatly prolonged, and the running safety of the floating disc is improved; the prepared composite carbon steel floating disc has the advantages of light weight, high strength, good corrosion resistance and good thermal performance.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a preparation method of a composite carbon steel floating disc, a conventional carbon steel floating disc is manufactured in a floating roof oil tank according to a traditional method, after the carbon steel floating disc is manufactured, a photocuring glass fiber reinforced plastic material construction is carried out on an immersion part of the carbon steel floating disc, and the preparation method comprises the following steps:
(1) Pretreatment before construction: before construction, derusting treatment is carried out on the carbon steel floating disc, and floating rust on the bottom plate and the side wall of the carbon steel floating disc is removed; because the direct adhesion force between the glass fiber reinforced plastic and the carbon steel floating disc is weaker, in order to ensure the adhesion strength, a layer of special primer is coated on the surface of the carbon steel floating disc, and the special primer covers all positions of the glass fiber reinforced plastic to be constructed, including the bottom plate and the side wall of the carbon steel floating disc and the inner surface of a through hole to be constructed, so that the surfaces of the bottom plate, the side wall and the inner wall surface of the through hole are all penetrated with the special primer; after the special primer is dried, the surfaces of the carbon steel floating disc bottom plate and the uneven side surface part are subjected to putty scraping treatment, so that the surfaces of the bottom plate and the side wall are flat. The putty is not common putty, is prepared by mixing putty and resin, and has good adhesion and strength with glass fiber reinforced plastic and primer.
(2) And (3) construction of a through hole: carbon steel floating plates are provided with a plurality of through holes, including manholes, guide post holes, floating plate support leg holes and the like (the number of the through holes is different according to the size and the structure of the floating plate, the number of the through holes is generally 1-2, the number of the guide post holes is 2, and the number of the support legs is related to the diameter of the floating plate), the through holes are easy to corrode, especially the parts contacting an oil surface, so the through holes also need to be covered with glass fiber reinforced plastics, and the through holes of the carbon steel floating plates need to be covered with the glass fiber reinforced plastics firstly and then covered with the bottom plate and the side walls. After the special primer coating and putty coating treatment in the step (1) is finished, constructing a through hole, firstly cutting the prepreg of the photo-curing glass fiber reinforced plastic material into a rectangle with the length slightly larger than the perimeter of the through hole and the width larger than the immersion depth of the floating disc by 150mm according to the perimeter of the through hole (because the common glass fiber reinforced plastic covering layer is 100mm from the bottom surface to the liquid surface and the bottom is provided with an outer edge of 50 mm); then, coating interface glue (the interface glue is used for ensuring no bubble in construction) on the special primer on the inner wall surface of the through hole; then paving the cut rectangular prepreg into the through hole, reserving 50mm at the bottom, repeatedly compacting the prepreg and the inner wall of the through hole by using a compression roller, and ensuring that the prepreg and the inner wall of the through hole are firmly compacted; flattening the inside of the through hole, and flattening the pre-preg with the thickness of 50mm reserved at the bottom of the through hole towards the bottom of the floating disc bottom plate; finally, cutting the prepreg of the photo-cured glass fiber reinforced plastic material into an annular reinforcing ring, wherein the purpose of the reinforcing ring is to strengthen the bonding strength between the bottom of the through hole and the floating disc, the inner circle diameter of the reinforcing ring is equal to and opposite to the through hole, the distance between the inner circle diameter and the outer circle diameter is generally about 200mm, and the construction is to coat interface adhesive firstly, then lay the prepreg, compress by using a compression roller and roll off bubbles. The curing of the through holes is performed simultaneously with the curing of the bottom plate and the side walls, and advanced photo-curing is not required.
(3) And (3) construction of side walls: after the construction of the through holes in the step (2) is completed, the side wall of the carbon steel floating disc is constructed, the prepreg of the photo-curing glass fiber reinforced plastic material is cut into a rectangle, the width of the first layer of prepreg is 100mm larger than the immersion depth of the floating disc, and the width of the second layer of prepreg is 200mm larger than the immersion depth of the floating disc; brushing interface glue on a part, which is required to be constructed, of the side wall of the floating disc, paving a first layer of prepreg, reserving 50mm at the bottom of the first layer of prepreg, repeatedly compacting the first layer of prepreg and the surface of the side wall, removing bubbles, and flattening the reserved 50mm long first layer of prepreg towards the bottom of the bottom plate of the floating disc to remove the bubbles; the surface layer of the first layer of prepreg is coated with interface glue, then a second layer of prepreg is paved, 100mm is reserved at the bottom of the second layer of prepreg, the second layer of prepreg is repeatedly compressed, air bubbles are removed, the reserved second layer of prepreg with the length of 100mm is flattened towards the bottom of the floating disc base plate, air bubbles are removed, connecting gaps of the two layers of prepreg are staggered, and strength is improved. The side walls are not photo-cured temporarily after being laid, and are photo-cured together after the bottom plates are laid.
(4) And (3) construction of a bottom plate: after the construction of the side wall in the step (3) is completed, constructing a bottom plate of the carbon steel floating plate, paving two layers of prepreg made of photo-cured glass fiber reinforced plastic materials on the same as the side wall of the bottom plate, firstly brushing interface glue on the part of the surface of the bottom plate, which is required to be constructed, paving a first layer of prepreg, repeatedly compacting, and removing bubbles; then coating interface glue on the surface layer of the first layer of prepreg, paving the second layer of prepreg, repeatedly compacting, and removing bubbles; the two layers of prepregs are paved until the outer edges of the prepregs are flush with the outer edges of the floating plates; when the prepreg is paved, the overlapping gaps of the two layers are paved in a staggered way;
(5) And (3) photo-curing treatment: when the construction of the through hole, the side wall and the bottom plate of the carbon steel floating plate is finished, performing light curing treatment, wherein the light curing adopts a special dual-band ultraviolet curing lamp, and the light curing time is 30 minutes;
(6) Detecting bubbles and paving quality: after the photocuring construction in the step (5) is finished, detecting whether bubbles or falling-off phenomenon exists in the through holes, the side walls and the bottom plate of the carbon steel floating disc; if the material falls off, repairing is carried out; if bubbles with the diameter smaller than 0.5cm exist, if the number of bubbles is less than 3 per square meter, local repair can be carried out, otherwise, the bubbles must be scratched, the prepreg of the light-supplementing curing glass fiber reinforced plastic material is added after the interface glue is coated, and the repair position is subjected to light curing again;
(7) And (3) brushing a conductive layer: mixing 99.48% of resin, 0.5% of pre-accelerator and 0.02% of inhibitor by mass percent for not less than 3 hours to obtain pre-accelerator resin after mixing; mixing 83% of pre-promotion resin, 15% of graphite and 2% of curing agent by mass percent to obtain conductive resin; and coating the obtained conductive resin on the side wall and the bottom plate of the carbon steel floating disc so as to cover the second layer of prepreg, forming a conductive layer by the conductive resin, and obtaining the composite carbon steel floating disc after the conductive layer is coated.
In the above technical solution, in step (1), the rust removal treatment means: if the new floating disc is constructed, even if the new floating disc is subjected to primary rust removal treatment after welding, the new floating disc is required to be subjected to secondary rust removal treatment, and the floating rust on the surface of the floating disc is removed; if the construction is carried out on the old floating disc, the rust removal treatment is directly carried out on the old floating disc, and the rust on the surface of the floating disc is removed.
In the above technical scheme, in the step (1), special primer is painted, which means that: according to the materials used by the floating disc, the special paint can strengthen the bonding strength of the glass fiber reinforced plastic and the floating disc, the special paint should be painted sequentially, the special paint should be painted to corners, cracks, rough holes and uneven parts, then the whole is evenly and carefully painted in sequence, the special paint is painted in a criss-cross manner, the whole base surface is enabled to be completely penetrated with the special paint, paint film defects such as missing painting, pinhole bubble and the like are avoided, and the special paint is painted mainly to ensure the bonding strength of the glass fiber reinforced plastic and the carbon steel after construction is finished.
In the above technical scheme, in step (1), puttying means: putty scraping treatment is carried out on the internal corners of the floating disc, the internal corners are made into round corners (R is generally more than 10 mm), and the surfaces are dry and clean; if the surface layers of the bottom plate and the side wall of the floating disc are relatively flat, putty is not required to be scraped, and if the surface layers of the bottom plate and the side wall are concave, putty is required to be used for leveling; the glass fiber reinforced plastic prepreg can be tightly attached to the external corner of the carbon steel piece, but is not tightly attached to the internal corner, so that the internal corner needs to be treated; in addition, the putty should be painted and scraped mainly by leveling as much as possible, and the defects of rolling skin, cracks, pits and the like are avoided.
In the technical scheme, in the step (1), the special primer is a paint with better bonding strength with the selected glass fiber reinforced plastic resin and carbon steel, and the special primer is a special primer selected from the Asian 8084 epoxy vinyl high-strength paint according to characteristics, and has better bonding strength with the carbon steel and the glass fiber reinforced plastic.
In the technical scheme, in the step (1), the thickness is 50-80 mu m when the special primer is coated.
In the above technical scheme, in the step (1), the putty comprises photo-curing resin and common putty, wherein the material of the photo-curing resin is the same as that of the resin in the photo-curing glass fiber reinforced plastic material, the common putty is commercially available putty commonly used for wall surface leveling, and the mass of the common putty is 1.5-2.5 times that of the photo-curing resin. Sometimes, in order to increase the cohesion, a small amount of asbestos wool or glass filaments is added, the diluent being added as little as possible.
In the above technical scheme, in the step (2), the thickness of the prepreg of the photo-cured glass fiber reinforced plastic material is 1-2mm during the construction of the through hole.
In the technical scheme, in the step (3), when the side wall is constructed, the thickness of the prepreg of the first layer of photo-cured glass fiber reinforced plastic material is 1-1.5mm; the thickness of the prepreg of the second layer of photo-cured glass fiber reinforced plastic material is 1-1.5mm.
In the technical scheme, in the step (4), the thickness of the prepreg of the first layer of the photo-curing glass fiber reinforced plastic material is 1-1.5mm during the construction of the bottom plate; the thickness of the prepreg of the second layer of photo-cured glass fiber reinforced plastic material is 1-1.5mm.
In the technical scheme, in the step (3) and the step (4), when two layers of prepregs of the side wall and the bottom plate of the floating disc are paved, seams of the two layers are required to be paved in a staggered manner; and secondly, the interface glue is coated on all the prepreg cutting edges, and because glass fibers possibly leak out of the cutting edges, the interface glue coating can prevent the leaked glass fibers from absorbing oil, so that oil products invade the glass fiber reinforced plastic.
In the above technical scheme, the photo-curing in the step (5) generally has two forms, one is to perform the construction while curing, that is, the curing lamps are paved for curing every construction section, and the other is to perform the curing uniformly after the whole construction is completed (because the thickness of the prepreg is 1-1.5mm, the total thickness of the two layers is below 5mm, and the curing can be performed once). The invention is to carry out photo-curing after the construction of the through hole, the side wall and the bottom plate is completed. When curing by the photo-curing technique, a UV light source is required to excite the photo-initiator in the formulation to generate free radicals or cations, and then the polymerization reaction of the initiator is performed, so that the conversion process from liquid state to solid state is completed, and therefore, the UV light source is a necessary hardware configuration for photo-curing application. In order to ensure safety, the invention adopts a special dual-band ultraviolet curing lamp as a curing light source, the power of the special dual-band ultraviolet curing lamp is about 100W-200W, the service life is generally 2-3 years, and a 12V direct current power supply is used. The curing lamps are discharged to ensure that all laid prepregs can be irradiated: the paving longitudinal distance of the curing lamps is 20cm, the transverse distance is 30cm, the curing time is 30 minutes, the curing lamps are designed into two forms for facilitating construction of the through holes, the curing lamps are generally rectangular and are used for light curing construction of the bottom plate and the side walls, and the curing lamps are cylindrical with the diameter of 40mm and are used for light curing construction of the through holes.
In the technical scheme, in the step (6), when the air bubbles or falling off phenomenon exists, an elbow of an iron wire or a small wood hammer can be taken for tapping, if the sound is crisp, the explanation is good, and if the sound of a shell is good, the air bubbles and the delamination phenomenon exist; if delamination defect is found, repairing is carried out; if the diameter of the air bubbles is less than 0.5cm, if the number of the air bubbles is less than 3 per square meter, local repair can be carried out, otherwise, the air bubbles must be scratched to repair the prepreg; the quality requirement of laying the photo-cured glass fiber reinforced plastic prepreg is ① that the prepreg has no quality defects such as bubbles, delamination, bubbling and the like; ② The prepreg has uniform color, no white spots, sealing bare wood, semitransparent sizing color on the surface of the whole glass fiber reinforced plastic, no obvious defects such as cracks and shadows, and the like.
In the technical scheme, the prepreg of the photo-cured glass fiber reinforced plastic material used in the invention is the prepreg of the photo-cured glass fiber reinforced plastic material taking the chopped strand mats as the frameworks. The glass fiber framework of the prepreg has various forms, mainly comprises two types of chopped strand mats and glass fiber cloth, and the construction of the floating disc adopts the prepreg of the chopped strand mat framework for enhancing the oil-proof effect.
In the technical scheme, the interface adhesive used in the invention is the photo-curing resin, the photo-curing resin is the same as the resin in the photo-curing glass fiber reinforced plastic material, and the photo-curing resin is coated on the surface to be paved when the prepreg is paved in construction, so that the removal of bubbles between the prepreg and the surface can be facilitated.
In the technical scheme, the interface adhesive used in the invention has the coating thickness of 0.08-0.12mm, preferably about 0.1 mm.
In the above technical scheme, in the step (7), when the conductive layer is coated, the resin is non-photo-curing resin, the material is the same as that of the resin in the common glass fiber reinforced plastic material, and in practical application, the common resin with the same model as that of the resin in the photo-curing glass fiber reinforced plastic material is preferable; the pre-accelerator is 6% cobalt naphthenate; the inhibitor is acetylacetone; the graphite is 800-mesh graphite; the curing agent is 925H curing agent.
In the above technical scheme, in the step (7), the thickness of the conductive resin is 0.5-0.6mm.
In the invention, in order to accelerate the construction speed and reduce the site construction amount, the photo-curing glass fiber reinforced plastic prepreg is adopted as the glass fiber reinforced plastic main body of the composite floating disc, so that the construction speed can be greatly improved, and the construction difficulty is reduced. The photo-curing glass fiber reinforced plastic material is a glass fiber reinforced composite material which takes unsaturated polyester resin/vinyl ester resin as a matrix, adds anti-corrosion functional filler and takes glass fiber as a reinforcement. And (3) adopting a UV curing technology, and initiating the composite material matrix resin to carry out cross-linking polymerization reaction by a photoinitiator under the irradiation action of ultraviolet rays. The photo-cured glass fiber reinforced plastic material is presoaked in factories, can be stored for a long time, and is subjected to UV curing when being used. Before construction, the photo-curing glass fiber reinforced plastic material is soft sheet-shaped, and the upper surface and the lower surface are respectively provided with a layer of plastic film, so that the photo-curing glass fiber reinforced plastic material is a composite material which can be stored at normal temperature; when the prepreg is constructed, the lower film is torn off firstly, so that the sheet is tightly adhered to the surface of an object, then the sheet is solidified by adopting an ultraviolet irradiation mode, and finally the upper film is torn off. The cured sheet has the characteristics of compact material, light weight, high strength and corrosion resistance. The photo-curing resin is characterized in that: compared with hand lay-up or spray glass reinforced plastic, the strength of the photo-cured glass reinforced plastic is higher; the process is simple, the glass fiber reinforced plastic can be manufactured into coiled materials with the width of 1-2 m and the length of 10m in factories in advance, the site construction is simple and quick, and the requirements of constructors are reduced; the photo-curing resin can be used in high humidity occasions, and the problem that manual pasting or spraying of glass fiber reinforced plastic cannot be performed in high humidity occasions is solved.
The invention also provides a composite carbon steel floating disc prepared by the method, which is positioned in the floating roof oil tank and comprises a floating disc main body and an anti-corrosion layer on the floating disc main body, and is characterized in that:
The inner wall of the through hole of the floating disc main body is coated with and/or paved with a special primer layer A and a prepreg layer of a photo-curing glass fiber reinforced plastic material in sequence from inside to outside, an annular reinforcing ring is adhered to the tail end of the through hole and the surface layer of the bottom plate, and the inner circle of the reinforcing ring is opposite to the inner diameter of the through hole; the special primer layer, the prepreg layer of the photo-cured glass fiber reinforced plastic material and the reinforcing ring form an anti-corrosion layer of the through hole;
The side wall and the bottom plate of the floating disc main body are sequentially coated and/or paved with a special primer layer B, a prepreg layer of a first layer of light-cured glass fiber reinforced plastic material, a prepreg layer of a second layer of light-cured glass fiber reinforced plastic material and a conductive layer from inside to outside, and the special primer layer, the prepreg layer of the first layer of light-cured glass fiber reinforced plastic material, the prepreg layer of the second layer of light-cured glass fiber reinforced plastic material and the conductive layer form an anti-corrosion layer of the side wall and the bottom plate.
In the technical scheme, the thickness of the special primer layer A in the through hole is 50-80 mu m; the thickness of the special primer layer B on the side wall and the bottom plate is 50-80 mu m.
In the technical scheme, the thickness of the prepreg layer of the photo-curing glass fiber reinforced plastic material in the through hole is 1-2mm; the thickness of the prepreg layer of the first layer of the photo-curing glass fiber reinforced plastic material on the side wall and the bottom plate is 1-1.5mm, and the thickness of the prepreg layer of the second layer of the photo-curing glass fiber reinforced plastic material is 1-1.5mm.
In the technical scheme, the thickness of the conductive layer is 0.5-0.6mm.
In the technical scheme, the reinforcing ring is made of prepreg made of photo-cured glass fiber reinforced plastic material, and the thickness of the reinforcing ring is 1-2mm; the inner diameter of the reinforcing ring is equal to that of the through hole, and the distance between the inner circle and the outer circle of the annular reinforcing ring is 200mm.
In the technical scheme, the prepreg of the photo-curing glass fiber reinforced plastic material is cut into a rectangle with the length slightly larger than the circumference of the through hole and the width larger than the immersion depth of the floating disc by 150mm, the rectangle is paved in the through hole after the interface glue is coated, the bottom is reserved for 50mm, the prepreg and the inner wall of the through hole are repeatedly pressed by using a pressing roller, and finally the prepreg with the length of 50mm reserved at the bottom is pressed to the bottom of the floating disc bottom plate to form the prepreg layer of the photo-curing glass fiber reinforced plastic material in the through hole; the reserved prepreg with the length of 50mm is flattened towards the bottom of the floating plate bottom plate, and then the reinforcing ring is arranged.
In the technical scheme, the prepreg of the photo-cured glass fiber reinforced plastic material is cut into a rectangle, the width of the prepreg is 100mm larger than the immersion depth of the floating disc, the part of the side wall of the floating disc, which is required to be constructed, is coated with interface glue, then the rectangle prepreg is paved, 50mm is reserved at the bottom of the prepreg, the prepreg is repeatedly pressed, and the reserved prepreg with the length of 50mm is flattened towards the bottom of the bottom plate of the floating disc to form the prepreg layer of the first photo-cured glass fiber reinforced plastic material on the side wall.
In the technical scheme, the prepreg of the photo-cured glass fiber reinforced plastic material is cut into a rectangle, and the width of the prepreg is 200mm larger than the immersion depth of the floating disc; the surface layer of the prepreg layer of the first layer of the photo-curing glass fiber reinforced plastic material is coated with interface glue, then rectangular prepreg is paved, 100mm is reserved at the bottom of the prepreg, the prepreg is repeatedly pressed, and the reserved prepreg with the length of 100mm is flattened towards the bottom of the floating disc bottom plate to form the prepreg layer of the second layer of the photo-curing glass fiber reinforced plastic material on the side wall.
The invention has the technical advantages that:
1. the relative density of the glass fiber reinforced plastic is between 1.5 and 2.0, and only 1/4 to 1/5 of the carbon steel, but the tensile strength is close to or even exceeds that of the carbon steel, and the specific strength can be compared with that of the high-grade alloy steel. Therefore, the method has excellent effect in aviation, rocket, spacecraft, high-pressure containers and other product applications needing dead weight reduction. The tensile strength, the bending strength and the compressive strength of some epoxy FRP can reach more than 400 Mpa.
2. The glass fiber reinforced plastic is good in corrosion resistance, is a good corrosion resistant material, and has relatively high resistance to the atmosphere, water, common concentration of acid, alkali, salt, various oils and solvents. Has been applied to various aspects of chemical corrosion protection, and is replacing carbon steel, stainless steel, wood, nonferrous metals, and the like.
3. The thermal performance is good, the thermal conductivity of the glass fiber reinforced plastic is low, the glass fiber reinforced plastic is 1.25-1.67 kJ/(m.h.K) at room temperature, and the glass fiber reinforced plastic is only 1/100-1/1000 of metal, thus being an excellent heat insulation material. Under the condition of instantaneous superhigh temperature, the material is ideal heat protection and ablation resistance material, and can protect the spacecraft from being washed by high-speed airflow at the temperature of more than 2000 ℃. The novel floating disc can effectively protect the medium in the tank.
4. The designability is good. Various structural products can be flexibly designed according to the needs to meet the use requirements, and the products can have good integrity.
5. The manufacturability is excellent, and the forming process can be flexibly selected according to the shape, technical requirement, application and quantity of the product.
Drawings
Fig. 1: schematic structural diagram of a composite carbon steel floating disc;
Fig. 2: schematic structural diagram of through holes in the composite carbon steel floating disc;
fig. 3: a structural schematic diagram of a bottom plate in the composite carbon steel floating disc;
wherein: 1 is a through hole of a carbon steel floating disc, 2 is a side wall of the carbon steel floating disc, 3 is a bottom plate of the carbon steel floating disc, and 4 is a special primer layer A;5 is a prepreg layer of photo-curing glass fiber reinforced plastic material; 6 is a reinforcing ring; 7 is a special primer layer B;8 is a prepreg layer of a first photo-cured glass fiber reinforced plastic material; 9 is a prepreg layer of a second photo-curing glass fiber reinforced plastic material; 10 is a conductive layer; 11 is the immersion liquid position; 12 is a floating roof oil tank. .
Detailed Description
The following detailed description of the technical scheme of the present invention is provided, but the present invention is not limited to the following descriptions:
The invention firstly provides a preparation method of a composite carbon steel floating disc, which comprises the following steps:
(1) Pretreatment before construction: before construction, derusting treatment is carried out on the carbon steel floating disc, and floating rust on the bottom plate and the side wall of the carbon steel floating disc is removed; then, brushing a layer of special primer on the bottom plate, the side wall and the inner surface of the through hole to be constructed of the carbon steel floating plate, so that the surface of the bottom plate, the surface of the side wall and the inner surface of the through hole are all penetrated with the special primer; after the special primer is dried, puttying treatment is carried out on the surfaces of the base plate and the uneven side surface parts, so that the surfaces of the base plate and the side wall are flat;
(2) And (3) construction of a through hole: the through holes on the carbon steel floating disc comprise manholes, guide post holes and floating disc supporting leg holes, and after the pretreatment in the step (1) is completed, the through holes are constructed: firstly, cutting the prepreg of the photo-curing glass fiber reinforced plastic material into a rectangle with the length slightly larger than the perimeter of the through hole and the width 150mm larger than the immersion depth of the floating disc according to the perimeter of the through hole; then coating interface adhesive on the special primer on the inner wall surface of the through hole; then paving the cut rectangular prepreg into the through hole, reserving 50mm at the bottom, repeatedly compacting the prepreg and the inner wall of the through hole by using a compression roller, and ensuring that the prepreg and the inner wall of the through hole are firmly compacted; flattening the inside of the through hole, and flattening the prepreg with the length of 50mm reserved at the bottom towards the bottom of the floating disc bottom plate; finally, cutting the prepreg of the photo-curing glass fiber reinforced plastic material into annular reinforcing rings, wherein the diameter of the inner circle of each reinforcing ring is equal to and opposite to that of the through hole, the distance between the inner circle and the outer circle of each reinforcing ring is 200mm, coating interface glue during construction, paving the prepreg, compacting by using a compression roller, and rolling off bubbles;
(3) And (3) construction of side walls: after the construction of the through holes in the step (2) is completed, the side wall of the carbon steel floating disc is constructed, the prepreg of the photo-curing glass fiber reinforced plastic material is cut into a rectangle, the width of the first layer of prepreg is 100mm larger than the immersion depth of the floating disc, and the width of the second layer of prepreg is 200mm larger than the immersion depth of the floating disc; brushing interface glue on a part, which is required to be constructed, of the side wall of the floating disc, paving a first layer of prepreg, reserving 50mm at the bottom of the first layer of prepreg, repeatedly compacting the first layer of prepreg and the surface of the side wall, removing bubbles, and flattening the reserved 50mm long first layer of prepreg towards the bottom of the bottom plate of the floating disc to remove the bubbles; brushing interface glue on the surface layer of the first layer of prepreg, paving a second layer of prepreg, reserving 100mm at the bottom of the second layer of prepreg, repeatedly compacting the second layer of prepreg, removing bubbles, flattening the reserved second layer of prepreg with the length of 100mm to the bottom of the floating disc bottom plate, and removing the bubbles;
(4) And (3) construction of a bottom plate: after the construction of the side wall in the step (3) is completed, constructing a bottom plate of the carbon steel floating plate, paving two layers of prepreg made of photo-cured glass fiber reinforced plastic materials on the same as the side wall of the bottom plate, firstly brushing interface glue on the part of the surface of the bottom plate, which is required to be constructed, paving a first layer of prepreg, repeatedly compacting, and removing bubbles; then coating interface glue on the surface layer of the first layer of prepreg, paving the second layer of prepreg, repeatedly compacting, and removing bubbles; the two layers of prepregs are paved until the outer edges of the prepregs are flush with the outer edges of the floating plates; when the prepreg is paved, the overlapping gaps of the two layers are paved in a staggered way;
(5) And (3) photo-curing treatment: when the construction of the through hole, the side wall and the bottom plate of the carbon steel floating plate is finished, performing light curing treatment, wherein the light curing adopts a special dual-band ultraviolet curing lamp, and the light curing time is 30 minutes;
(6) Detecting bubbles and paving quality: after the photocuring construction in the step (5) is finished, detecting whether bubbles or falling-off phenomenon exists in the through holes, the side walls and the bottom plate of the carbon steel floating disc; if the material falls off, repairing is carried out; if bubbles with the diameter smaller than 0.5cm exist, if the number of bubbles is less than 3 per square meter, local repair can be carried out, otherwise, the bubbles must be scratched, the prepreg of the light-supplementing curing glass fiber reinforced plastic material is added after the interface glue is coated, and the repair position is subjected to light curing again;
(7) And (3) brushing a conductive layer: mixing 99.48% of resin, 0.5% of pre-accelerator and 0.02% of inhibitor by mass percent for not less than 3 hours to obtain pre-accelerator resin after mixing; mixing 83% of pre-promotion resin, 15% of graphite and 2% of curing agent by mass percent to obtain conductive resin; and coating the obtained conductive resin on the side wall and the bottom plate of the carbon steel floating disc so as to cover the second layer of prepreg, forming a conductive layer by the conductive resin, and obtaining the composite carbon steel floating disc after the conductive layer is coated.
The present invention also provides a composite carbon steel floating disc positioned within the floating roof tank 12 as shown in fig. 1-3:
The inner wall of the through hole 1 of the floating disc main body is coated and/or paved with a special primer layer A4 and a prepreg layer 5 of a photo-curing glass fiber reinforced plastic material from inside to outside in sequence, an annular reinforcing ring 6 is adhered to the tail end of the through hole and the surface layer of the bottom plate, and the inner circle of the reinforcing ring is opposite to the inner diameter of the through hole; the special primer layer, the prepreg layer of the photo-cured glass fiber reinforced plastic material and the reinforcing ring form an anti-corrosion layer of the through hole;
The side wall 2 and the bottom plate 3 of the floating disc main body are sequentially coated and/or paved with a special primer layer B7, a prepreg layer 8 of a first layer of light-cured glass fiber reinforced plastic material, a prepreg layer 9 of a second layer of light-cured glass fiber reinforced plastic material and a conductive layer 10 from inside to outside, and the special primer layer, the prepreg layer of the first layer of light-cured glass fiber reinforced plastic material, the prepreg layer of the second layer of light-cured glass fiber reinforced plastic material and the conductive layer form an anti-corrosion layer of the side wall and the bottom plate;
The thickness of the special primer layer A4 in the through hole is 50-80 mu m; the thickness of the special primer layer B7 on the side wall and the bottom plate is 50-80 mu m; the thickness of the conductive layer 10 is 0.5-0.6mm;
The thickness of the prepreg layer 5 of the photo-curing glass fiber reinforced plastic material in the through hole is 1-2mm; the thickness of the prepreg layer 8 of the first layer of the light-cured glass fiber reinforced plastic material on the side wall and the bottom plate is 1-1.5mm, and the thickness of the prepreg layer 9 of the second layer of the light-cured glass fiber reinforced plastic material is 1-1.5mm; the reinforcing ring 6 is made of prepreg made of photo-cured glass fiber reinforced plastic material, and has a thickness of 1-2mm; the inner diameter of the reinforcing ring is equal to that of the through hole, and the distance between the inner circle and the outer circle of the annular reinforcing ring is 200mm.
The construction of the method and composite carbon steel float plate of the present invention is described below in connection with specific examples:
example 1:
In the embodiment, the prepreg of the photo-curing glass fiber reinforced plastic material is a CP201 prepreg sheet produced by Beijing Ying toughness technology, the thickness is 1.5mm, and the width is 2 meters; the 470 light-cured resin and the E glass fiber chopped strand mat are adopted as main raw materials, and have high strength and corrosion resistance. In this example, the interfacial adhesive was 470 photo-curable resin, and the thickness of the brush was about 0.1 mm.
A preparation method of a composite carbon steel floating disc, a conventional carbon steel floating disc is manufactured in a floating roof oil tank according to a traditional method, after the carbon steel floating disc is manufactured, the construction of a photocuring glass fiber reinforced plastic material is carried out on the immersion part of the carbon steel floating disc, and the preparation method comprises the following steps:
(1) Pretreatment before construction: before construction, derusting treatment is carried out on the carbon steel floating disc, and floating rust on the bottom plate and the side wall of the carbon steel floating disc is removed; then, brushing a layer of special primer on the bottom plate, the side wall and the inner surface of the through hole to be constructed of the carbon steel floating plate, so that the surface of the bottom plate, the surface of the side wall and the inner surface of the through hole are all penetrated with the special primer; after the special primer is dried, puttying treatment is carried out on the surfaces of the base plate and the uneven side surface parts, so that the surfaces of the base plate and the side wall are flat;
the special primer is a Asian 8084 epoxy vinyl high-strength paint, has better bonding strength with photo-curing 470 resin and carbon steel, and has a thickness of 50-80 mu m when being coated with the special primer.
The putty comprises 470 photo-curing resin and common putty, wherein the mass of the common putty is 2 times of that of the 470 photo-curing resin.
(2) And (3) construction of a through hole: the through holes on the carbon steel floating disc comprise manholes, guide post holes and floating disc supporting leg holes, and after the pretreatment in the step (1) is completed, the through holes are constructed: firstly, cutting the prepreg of the photo-curing glass fiber reinforced plastic material into a rectangle with the length slightly larger than the perimeter of the through hole and the width 150mm larger than the immersion depth of the floating disc according to the perimeter of the through hole; then coating interface adhesive on the special primer on the inner wall surface of the through hole; then paving the cut rectangular prepreg into the through hole, reserving 50mm at the bottom, repeatedly compacting the prepreg and the inner wall of the through hole by using a compression roller, and ensuring that the prepreg and the inner wall of the through hole are firmly compacted; flattening the inside of the through hole, and flattening the prepreg with the length of 50mm reserved at the bottom towards the bottom of the floating disc bottom plate; finally, cutting the prepreg of the photo-curing glass fiber reinforced plastic material into annular reinforcing rings, wherein the diameter of the inner circle of each reinforcing ring is equal to and opposite to that of the through hole, the distance between the inner circle and the outer circle of each reinforcing ring is 200mm, coating interface glue during construction, paving the prepreg, compacting by using a compression roller, and rolling off bubbles; as shown in fig. 2.
(3) And (3) construction of side walls: after the construction of the through holes in the step (2) is completed, the side wall of the carbon steel floating disc is constructed, the prepreg of the photo-curing glass fiber reinforced plastic material is cut into a rectangle, the width of the first layer of prepreg is 100mm larger than the immersion depth of the floating disc, and the width of the second layer of prepreg is 200mm larger than the immersion depth of the floating disc; brushing interface glue on a part, which is required to be constructed, of the side wall of the floating disc, paving a first layer of prepreg, reserving 50mm at the bottom of the first layer of prepreg, repeatedly compacting the first layer of prepreg and the surface of the side wall, removing bubbles, and flattening the reserved 50mm long first layer of prepreg towards the bottom of the bottom plate of the floating disc to remove the bubbles; brushing interface glue on the surface layer of the first layer of prepreg, paving a second layer of prepreg, reserving 100mm at the bottom of the second layer of prepreg, repeatedly compacting the second layer of prepreg, removing bubbles, flattening the reserved second layer of prepreg with the length of 100mm to the bottom of the floating disc bottom plate, and removing the bubbles; as shown in fig. 1. When the prepreg of the two layers of the photo-curing glass fiber reinforced plastic materials on the side wall of the floating plate is paved, the joints of the two layers are paved in a staggered mode, and interface glue is coated at the cut parts of the prepreg of the photo-curing glass fiber reinforced plastic materials.
(4) And (3) construction of a bottom plate: after the construction of the side wall in the step (3) is completed, constructing a bottom plate of the carbon steel floating plate, paving two layers of prepreg made of photo-cured glass fiber reinforced plastic materials on the same as the side wall of the bottom plate, firstly brushing interface glue on the part of the surface of the bottom plate, which is required to be constructed, paving a first layer of prepreg, repeatedly compacting, and removing bubbles; then coating interface glue on the surface layer of the first layer of prepreg, paving the second layer of prepreg, repeatedly compacting, and removing bubbles; and (3) paving the two layers of prepregs until the outer edges of the prepregs are flush with the outer edges of the floating plates. When the prepregs of the two layers of the photo-curing glass fiber reinforced plastics materials of the bottom plate of the floating plate are paved, joints of the two layers are paved in a staggered mode, and interface glue is coated at cut parts of the prepregs of the photo-curing glass fiber reinforced plastics materials.
(5) And (3) photo-curing treatment: when the construction of the through hole, the side wall and the bottom plate of the carbon steel floating plate is finished, performing light curing treatment, wherein the light curing adopts a special dual-band ultraviolet curing lamp, the power is 100W-200W, the power is a 12V direct current power supply, and the light curing time is 30 minutes; the special dual-band ultraviolet curing lamp is rectangular when the side wall and the bottom plate are photo-cured, and is cylindrical (diameter is 40 mm) when the through hole is photo-cured; the special double-band ultraviolet curing lamps are paved with longitudinal intervals of 20cm and transverse intervals of 30cm.
(6) Detecting bubbles and paving quality: after the construction of the side wall and the bottom plate of the floating disc is finished, checking whether the air bubble slope protection is delaminated, and tapping an elbow or a small wood hammer of an iron wire, if the sound is crisp, the explanation is good, and if the sound of a shell is sounded, the air bubble and delamination phenomenon exists; if delamination defect is found, repairing is carried out; if the diameter of the air bubbles is less than 0.5cm, if the number of the air bubbles is less than 3 per square meter, local repair can be carried out, otherwise, the air bubbles must be scratched to repair the prepreg; the quality requirement of laying the photo-cured glass fiber reinforced plastic prepreg is ① that the prepreg has no quality defects such as bubbles, delamination, bubbling and the like; ② The prepreg has uniform color, no white spots, sealing bare wood, semitransparent sizing color on the surface of the whole glass fiber reinforced plastic, no obvious defects such as cracks and shadows, and the like.
(7) And (3) brushing a conductive layer: mixing 470 common resin with the mass percentage of 99.48 percent, 0.5 percent of pre-accelerator (6 percent of cobalt naphthenate) and 0.02 percent of inhibitor (acetylacetone) for not less than 3 hours to obtain pre-accelerator resin after the mixing is completed; mixing 83% of pre-promotion resin, 15% of graphite (800 meshes) and 2% of curing agent (925H curing agent) by mass percent to obtain conductive resin; and coating the obtained conductive resin on the side wall and the bottom plate of the carbon steel floating disc so as to cover the second layer of prepreg, wherein the conductive resin forms a conductive layer (the thickness is 0.5-0.6 mm), and the composite carbon steel floating disc is obtained after the conductive layer is coated.
Example 2:
A composite carbon steel floating disc is prepared by the preparation method of the embodiment 1:
The inner wall of the through hole 1 of the floating disc main body is coated and/or paved with a special primer layer A4 and a prepreg layer 5 of a photo-curing glass fiber reinforced plastic material from inside to outside in sequence, an annular reinforcing ring 6 is adhered to the tail end of the through hole and the surface layer of the bottom plate, and the inner circle of the reinforcing ring is opposite to the inner diameter of the through hole; the special primer layer, the prepreg layer of the photo-cured glass fiber reinforced plastic material and the reinforcing ring form an anti-corrosion layer of the through hole;
The side wall 2 and the bottom plate 3 of the floating disc main body are sequentially coated and/or paved with a special primer layer B7, a prepreg layer 8 of a first layer of light-cured glass fiber reinforced plastic material, a prepreg layer 9 of a second layer of light-cured glass fiber reinforced plastic material and a conductive layer 10 from inside to outside, and the special primer layer, the prepreg layer of the first layer of light-cured glass fiber reinforced plastic material, the prepreg layer of the second layer of light-cured glass fiber reinforced plastic material and the conductive layer form an anti-corrosion layer of the side wall and the bottom plate;
the thickness of the special primer layer A4 in the through hole is 60-70 mu m; the thickness of the special primer layer B7 on the side wall and the bottom plate is 60-70 mu m; the thickness of the conductive layer 10 is 0.5-0.6mm;
The thickness of the prepreg layer 5 of the photo-curing glass fiber reinforced plastic material in the through hole is 1.5mm;
the thickness of the prepreg layer 8 of the first layer of the photo-curing glass fiber reinforced plastic material on the side wall and the bottom plate is 1.5mm, and the thickness of the prepreg layer 9 of the second layer of the photo-curing glass fiber reinforced plastic material is 1.5mm;
The reinforcing ring 6 is made of prepreg made of photo-cured glass fiber reinforced plastic material, and has a thickness of 1.5mm; the inner diameter of the reinforcing ring is equal to that of the through hole, and the distance between the inner circle and the outer circle of the annular reinforcing ring is 200mm.
The foregoing examples are merely illustrative of the technical concept and technical features of the present invention, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made according to the essence of the present invention should be included in the scope of the present invention.
Claims (10)
1. The preparation method of the composite carbon steel floating disc comprises the steps of manufacturing a conventional carbon steel floating disc in a floating roof oil tank according to a traditional method, and constructing a photocuring glass fiber reinforced plastic material on an immersion part of the carbon steel floating disc after the carbon steel floating disc is manufactured, and is characterized by comprising the following steps:
(1) Pretreatment before construction: before construction, derusting treatment is carried out on the carbon steel floating disc, and floating rust on the bottom plate and the side wall of the carbon steel floating disc is removed; then, brushing a layer of special primer on the bottom plate, the side wall and the inner surface of the through hole to be constructed of the carbon steel floating plate, so that the surface of the bottom plate, the surface of the side wall and the inner surface of the through hole are all penetrated with the special primer; after the special primer is dried, puttying treatment is carried out on the surfaces of the base plate and the uneven side surface parts, so that the surfaces of the base plate and the side wall are flat;
(2) And (3) construction of a through hole: the through holes on the carbon steel floating disc comprise manholes, guide post holes and floating disc supporting leg holes, and after the pretreatment in the step (1) is completed, the through holes are constructed: firstly, cutting the prepreg of the photo-curing glass fiber reinforced plastic material into a rectangle with the length slightly larger than the perimeter of the through hole and the width 150mm larger than the immersion depth of the floating disc according to the perimeter of the through hole; then coating interface adhesive on the special primer on the inner wall surface of the through hole; then paving the cut rectangular prepreg into the through hole, reserving 50mm at the bottom, repeatedly compacting the prepreg and the inner wall of the through hole by using a compression roller, and ensuring that the prepreg and the inner wall of the through hole are firmly compacted; flattening the inside of the through hole, and flattening the prepreg with the length of 50mm reserved at the bottom towards the bottom of the floating disc bottom plate; finally, cutting the prepreg of the photo-curing glass fiber reinforced plastic material into annular reinforcing rings, wherein the diameter of the inner circle of each reinforcing ring is equal to and opposite to that of the through hole, the distance between the inner circle and the outer circle of each reinforcing ring is 200mm, coating interface glue during construction, paving the prepreg, compacting by using a compression roller, and rolling off bubbles;
(3) And (3) construction of side walls: after the construction of the through holes in the step (2) is completed, the side wall of the carbon steel floating disc is constructed, the prepreg of the photo-curing glass fiber reinforced plastic material is cut into a rectangle, the width of the first layer of prepreg is 100mm larger than the immersion depth of the floating disc, and the width of the second layer of prepreg is 200mm larger than the immersion depth of the floating disc; brushing interface glue on a part, which is required to be constructed, of the side wall of the floating disc, paving a first layer of prepreg, reserving 50mm at the bottom of the first layer of prepreg, repeatedly compacting the first layer of prepreg and the surface of the side wall, removing bubbles, and flattening the reserved 50mm long first layer of prepreg towards the bottom of the bottom plate of the floating disc to remove the bubbles; brushing interface glue on the surface layer of the first layer of prepreg, paving a second layer of prepreg, reserving 100mm at the bottom of the second layer of prepreg, repeatedly compacting the second layer of prepreg, removing bubbles, flattening the reserved second layer of prepreg with the length of 100mm to the bottom of the floating disc bottom plate, and removing the bubbles;
(4) And (3) construction of a bottom plate: after the construction of the side wall in the step (3) is completed, constructing a bottom plate of the carbon steel floating plate, paving two layers of prepreg made of photo-cured glass fiber reinforced plastic materials on the same as the side wall of the bottom plate, firstly brushing interface glue on the part of the surface of the bottom plate, which is required to be constructed, paving a first layer of prepreg, repeatedly compacting, and removing bubbles; then coating interface glue on the surface layer of the first layer of prepreg, paving the second layer of prepreg, repeatedly compacting, and removing bubbles; the two layers of prepregs are paved until the outer edges of the prepregs are flush with the outer edges of the floating plates; when the prepreg is paved, the overlapping gaps of the two layers are paved in a staggered way;
(5) And (3) photo-curing treatment: when the construction of the through hole, the side wall and the bottom plate of the carbon steel floating plate is finished, performing light curing treatment, wherein the light curing adopts a special dual-band ultraviolet curing lamp, and the light curing time is 30 minutes;
(6) Detecting bubbles and paving quality: after the photocuring construction in the step (5) is finished, detecting whether bubbles or falling-off phenomenon exists in the through holes, the side walls and the bottom plate of the carbon steel floating disc; if the material falls off, repairing is carried out; if bubbles with the diameter smaller than 0.5cm exist, if the number of bubbles is less than 3 per square meter, local repair can be carried out, otherwise, the bubbles must be scratched, the prepreg of the light-supplementing curing glass fiber reinforced plastic material is added after the interface glue is coated, and the repair position is subjected to light curing again;
(7) And (3) brushing a conductive layer: mixing 99.48% of resin, 0.5% of pre-accelerator and 0.02% of inhibitor by mass percent for not less than 3 hours to obtain pre-accelerator resin after mixing; mixing 83% of pre-promotion resin, 15% of graphite and 2% of curing agent by mass percent to obtain conductive resin; and coating the obtained conductive resin on the side wall and the bottom plate of the carbon steel floating disc so as to cover the second layer of prepreg, forming a conductive layer by the conductive resin, and obtaining the composite carbon steel floating disc after the conductive layer is coated.
2. The method according to claim 1, wherein in the step (1), the special primer is a asian 8084 epoxy vinyl high-strength paint, and the thickness of the special primer is 50-80 μm when the special primer is coated; the putty comprises light-cured resin and common putty, wherein the mass of the common putty is 1.5-2.5 times that of the light-cured resin, the light-cured resin is the same as the resin in the light-cured glass fiber reinforced plastic material, and the common putty is commercially available in the process of wall surface leveling.
3. The method according to claim 1, wherein the thickness of the prepreg of the photo-cured glass fiber reinforced plastic material is 1 to 2mm during the through-hole construction in the step (2); in the step (3), the thickness of the prepreg of the first layer of the light-cured glass fiber reinforced plastic material and the thickness of the prepreg of the second layer of the light-cured glass fiber reinforced plastic material are 1-1.5mm during the construction of the side wall; and (3) in the step (4), the thickness of the prepreg of the first layer of the light-cured glass fiber reinforced plastic material and the thickness of the prepreg of the second layer of the light-cured glass fiber reinforced plastic material are 1-1.5mm during the construction of the bottom plate.
4. The method according to claim 1, wherein in the step (3) and the step (4), when the prepregs of the two layers of the photo-curing glass fiber reinforced plastic materials of the side wall and the bottom plate of the floating disc are laid, the joints of the two layers are laid in a staggered manner; the cut parts of the prepreg of the photo-curing glass fiber reinforced plastic material are coated with interface glue.
5. The method according to claim 1, wherein in the step (5), the special dual-band ultraviolet curing lamp has a power of 100W-200W and a power supply of 12V dc; when the side wall and the bottom plate are photo-cured, the special dual-band ultraviolet curing lamp is rectangular, and when the through hole is photo-cured, the special dual-band ultraviolet curing lamp is cylindrical; the special double-band ultraviolet curing lamps are paved with longitudinal intervals of 20cm and transverse intervals of 30cm.
6. The method according to claim 1, wherein the prepreg of the photo-cured glass fiber reinforced plastic material is a prepreg of a photo-cured glass fiber reinforced plastic material with a chopped strand mat as a skeleton; the interface adhesive is light-cured resin, the material of the light-cured resin is the same as that of the resin in the light-cured glass fiber reinforced plastic material, and the coating thickness of the interface adhesive is 0.08-0.12mm.
7. The method according to claim 1, wherein in the step (7), the resin is a non-light-cured resin, and the material is the same as that of the resin in the common glass fiber reinforced plastic material; the pre-accelerator is 6% cobalt naphthenate; the inhibitor is acetylacetone; the graphite is 800-mesh graphite; the curing agent is 925H curing agent; when the conductive resin is coated, the coating thickness is 0.5-0.6mm.
8. A composite carbon steel float disc prepared by the preparation method of any one of claims 1-7, wherein the composite carbon steel float disc is positioned in a floating roof oil tank (12) and comprises a float disc main body and an anti-corrosion layer on the float disc main body, and is characterized in that:
The inner wall of the through hole (1) of the floating disc main body is sequentially coated and/or paved with a special primer layer A (4) and a prepreg layer (5) made of photo-cured glass fiber reinforced plastic material from inside to outside, an annular reinforcing ring (6) is adhered to the tail end of the through hole and the surface layer of the bottom plate, and the inner circle of the reinforcing ring is opposite to the inner diameter of the through hole; the special primer layer, the prepreg layer of the photo-cured glass fiber reinforced plastic material and the reinforcing ring form an anti-corrosion layer of the through hole;
the side wall (2) and the bottom plate (3) of the floating disc main body are sequentially coated and/or paved with a special primer layer B (7), a prepreg layer (8) of a first layer of light-cured glass fiber reinforced plastic material, a prepreg layer (9) of a second layer of light-cured glass fiber reinforced plastic material and a conductive layer (10) from inside to outside, and the special primer layer, the prepreg layer of the first layer of light-cured glass fiber reinforced plastic material, the prepreg layer of the second layer of light-cured glass fiber reinforced plastic material and the conductive layer form an anti-corrosion layer of the side wall and the bottom plate.
9. The composite carbon steel floating disc of claim 8, wherein: the thickness of the special primer layer A (4) in the through hole is 50-80 mu m; the thickness of the special primer layer B (7) on the side wall and the bottom plate is 50-80 mu m; the thickness of the conductive layer (10) is 0.5-0.6mm.
10. The composite carbon steel floating disc of claim 8, wherein: the thickness of the prepreg layer (5) of the photo-curing glass fiber reinforced plastic material in the through hole is 1-2mm; the thickness of the prepreg layer (8) of the first layer of the light-cured glass fiber reinforced plastic material on the side wall and the bottom plate is 1-1.5mm, and the thickness of the prepreg layer (9) of the second layer of the light-cured glass fiber reinforced plastic material is 1-1.5mm; the reinforcing ring (6) is made of prepreg made of photo-cured glass fiber reinforced plastic material, and the thickness of the reinforcing ring is 1-2mm; the inner diameter of the reinforcing ring is equal to that of the through hole, and the distance between the inner circle and the outer circle of the annular reinforcing ring is 200mm.
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| CN210913754U (en) * | 2019-10-11 | 2020-07-03 | 沃德林科环保设备（北京）有限公司 | Novel composite carbon steel floating disc |
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| WO2012049502A2 (en) * | 2010-10-12 | 2012-04-19 | Trelleborg Offshore U.K. Ltd | Full-Contact Floating Roof for Liquid Storage Tanks |
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