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CN112570237A - Coating structure for track beam, construction method of coating structure and track beam - Google Patents

Coating structure for track beam, construction method of coating structure and track beam Download PDF

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Publication number
CN112570237A
CN112570237A CN201910935455.5A CN201910935455A CN112570237A CN 112570237 A CN112570237 A CN 112570237A CN 201910935455 A CN201910935455 A CN 201910935455A CN 112570237 A CN112570237 A CN 112570237A
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CN
China
Prior art keywords
layer
coating structure
wear
aggregate
resistant layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910935455.5A
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Chinese (zh)
Inventor
孙宗荟
刘自强
齐添
苏永超
娄须飞
陈蓉
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BYD Co Ltd
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BYD Co Ltd
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Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN201910935455.5A priority Critical patent/CN112570237A/en
Publication of CN112570237A publication Critical patent/CN112570237A/en
Pending legal-status Critical Current

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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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B05D7/26—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials synthetic lacquers or varnishes
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C09D5/10—Anti-corrosive paints containing metal dust
    • C09D5/106—Anti-corrosive paints containing metal dust containing Zn
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00—General structure of permanent way
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a coating structure for a track beam, a construction method of the coating structure and the track beam, wherein the coating structure comprises a bottom layer, an intermediate wear-resistant layer, antiskid aggregate and a surface layer, the bottom layer is suitable for being arranged on a beam body of the track beam, the intermediate wear-resistant layer is suitable for being coated on the bottom layer, the surface layer is arranged on one side of the intermediate wear-resistant layer, which is far away from the bottom layer, the antiskid aggregate is positioned between the intermediate wear-resistant layer and the surface layer and is connected with the intermediate wear-resistant layer and the surface layer, and the antiskid aggregate forms a discontinuous fault between the intermediate wear-resistant layer and the surface layer, so that the coating structure forms an uneven surface. According to the coating structure, the coating structure is convenient to manufacture, the production efficiency is high, and the coating structure can be ensured to have a larger friction coefficient and better corrosion resistance to the beam body.

Description

Coating structure for track beam, construction method of coating structure and track beam
Technical Field
The invention relates to the field of rail transit, in particular to a coating structure for a rail beam, a construction method of the coating structure and the rail beam.
Background
The track beam in the related art is exposed and is not provided with a coating or is only provided with an anti-corrosion coating, and the surface friction coefficient of the track beam is low. When the vehicle runs on the track beam, the wheels of the vehicle easily slip, and vehicle running accidents occur.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, a first aspect of the invention proposes a coating structure that improves production efficiency and corrosion protection at least to some extent.
The second aspect of the invention provides a construction method of the coating structure.
A third aspect of the invention proposes a track beam having the above-described coating structure.
The coating structure according to the first aspect of the present invention comprises: bottom, middle wearing layer, anti-skidding aggregate and surface course, the bottom is suitable for the setting to be in on the roof beam body of track roof beam, middle wearing layer is suitable for the coating and is in on the bottom, the surface course sets up middle wearing layer deviates from one side of bottom, anti-skidding aggregate is located middle wearing layer with between the surface course and all with middle wearing layer and the surface course is connected, anti-skidding aggregate is in middle wearing layer with form discontinuous fault between the surface course, so that coating structure forms unevenness's surface.
According to the coating structure disclosed by the first aspect of the invention, the coating structure is convenient to manufacture and high in production efficiency, and in addition, the coating structure can be ensured to have a larger friction coefficient and better corrosion resistance to the beam body.
Further, the surface layer and the middle wear-resistant layer are both: the bottom layer is a zinc-rich epoxy paint layer, and the surface layer and the middle wear-resistant layer are both wear-resistant epoxy paint layers.
Furthermore, the thickness of the bottom layer is 40-80 μm, the thickness of the middle wear-resistant layer is 200-500 μm, and the thickness of the surface layer is 100-200 μm.
Further, the height difference of the rugged surface of the coating structure is in the range of 145 to 630 μm.
Further, the particle size of the anti-slip aggregate is 30-80 meshes.
Further, the spreading amount of the anti-skid aggregate is 0.8kg/m2～1.9kg/m2The anti-skid aggregate comprises one or more of quartz sand, carborundum or corundum sand.
The construction method of the coating structure according to the second aspect of the present invention comprises, in order: a bottom layer construction step, a middle wear-resistant layer construction step, an anti-skid aggregate construction step and a surface layer construction step, wherein,
the construction steps of the anti-slip aggregate further comprise: and before the intermediate wear-resistant layer is hard dried, spraying the antiskid aggregate onto the intermediate wear-resistant layer.
According to the construction method of the second aspect of the invention, the overall strength of the coating structure after being manufactured can be enhanced, and the working reliability of the coating structure is high.
Further, the construction step of the anti-slip aggregate further comprises the following steps: and after the middle wear-resistant layer is hard dried, applying pressure to scrape the anti-skid aggregate which is not firmly attached to the middle wear-resistant layer.
Further, the construction step of the surface layer comprises the following steps: after the middle wear-resistant layer is hard-dried, spraying a surface layer coating on the middle wear-resistant layer and the anti-skid aggregate so that the surface layer coating covers the anti-skid aggregate.
The track beam according to the third aspect of the present invention is provided with a beam body having a vehicle running surface and the coating structure according to the first aspect of the present invention, the coating structure being adapted to be coated on the vehicle running surface.
According to the track beam of the third aspect of the invention, the track beam is simple to manufacture and high in production efficiency, the vehicle traveling surface of the track beam can be ensured to have good corrosion resistance and large friction force, and the traveling safety of the vehicle on the track beam is ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a coating structure according to an embodiment of the present invention applied to a beam body;
FIG. 2 is a schematic layer diagram of a coating structure applied to a beam body according to an embodiment of the present invention.
Reference numerals:
the track beam comprises a track beam 1000, a coating structure 100, a bottom layer 1, a middle layer 2, a middle wear-resistant layer 21, anti-skidding aggregate 22, a surface layer 3 and a beam body 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A coating architecture 100 according to an embodiment of the present invention will first be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the coating structure 100 according to the embodiment of the present invention may include a bottom layer 1, an intermediate wear-resistant layer 21, an anti-slip coating 22, and a surface layer 3, where the bottom layer 1 is suitable for being coated and disposed on a beam body 200 of a track beam 1000, the intermediate wear-resistant layer 21 is coated and disposed on the bottom layer 1, the anti-slip aggregate 22 is disposed between the intermediate wear-resistant layer 21 and the surface layer 3 and is connected to the intermediate wear-resistant layer 21 and the surface layer, and the intermediate wear-resistant layer 21 and the anti-slip aggregate 22 are both located between the bottom layer 1 and the surface layer 3.
The anti-skid aggregate 22 is at least partially exposed out of the surface of the middle wear-resistant layer 21 facing the surface layer 3, the surface layer 3 is coated on the surface of one side of the middle wear-resistant layer 21, which is away from the bottom layer 1, and the surface of the anti-skid aggregate 22, which protrudes out of the middle wear-resistant layer 21, so that the surface layer 3 can protect the middle wear-resistant layer 21 and the anti-skid aggregate 22. In other words, the anti-slip aggregate 22 is connected between the intermediate wear layer 21 and the facing layer 3 and forms a discontinuous layer, so that the coating structure 100 forms an uneven surface.
The anti-skid aggregate 22 can increase the friction coefficient of the coating structure 100 at the surface layer 3, and can make the surface of the coating structure 100 uneven, when the track beam 1000 is in rain, rain water can be discharged from the dent on the surface of the coating structure 100, a continuous water film cannot be formed on the surface of the track beam 1000, the drainage performance of the track beam 1000 is enhanced, the friction coefficient between the beam surface of the track beam 1000 and a tire is improved, the corrosion of the surface of the track beam 1000 due to accumulated water is avoided, and meanwhile, the anti-skid performance of the track beam 1000 in rainy weather is also increased. In addition, the anti-slip aggregate 22 is added, so that the surface of one side, which is in contact with a running wheel of a rail vehicle, of the whole coating structure is uneven, the rubber tire can deform to a certain extent when the raised anti-slip aggregate 22 is in contact with the tire, and the anchoring effect is achieved, so that the friction coefficient of the whole coating structure and the rail vehicle is remarkably increased.
On the other hand, in the prior art, a wear-resistant layer for improving the friction force and the wear resistance of the track beam is arranged in a coating structure, and the wear-resistant layer is formed by coating a coating prepared by mixing EP330 aliphatic polyurethane glass flake paint and quartz sand/steel shots.
In the prior art, the coating prepared by mixing the glass flake paint and the quartz sand/steel shot has low adhesion, and the coating needs to be sprayed for multiple times to ensure that the wear-resistant layer has enough thickness so as to meet the requirements of friction force and wear resistance of the track beam. The wear-resistant layer with the structure has low production efficiency, low adhesive force and easy surface cracking. Simultaneously, the rust-resistant of track roof beam is realized only through the mode of physics isolation to current coating structure, keeps apart with the outside air through the roof beam body with the track roof beam to avoid the roof beam body to take place the oxidation reaction corrosion with the oxygen in the air, but only the mode anticorrosive effect through physics isolation is poor.
In addition, before the coating structure is coated on the beam body, the surface of the beam body needs to be sanded and derusted, the coating prepared by mixing the glass flake paint and the quartz sand/steel shot needs to be sanded to the derusting Sa2.5 level, so that the coating structure can be effectively coated on the surface of the beam body, the requirement on derusting the surface of the beam body is high, and the production efficiency is low. For a track beam that has been in use for some time, the difficulty of providing the coating structure is great, and even a new track beam needs to be replaced, resulting in increased costs.
According to the invention, the anti-skid aggregate 22 (for example, wear-resistant and anti-skid aggregate such as quartz particles, which is only described as an example) is attached to the middle wear-resistant layer 21, so that the anti-skid aggregate 22 does not need to be mixed into the middle wear-resistant layer 21 as in the prior art, the adhesion of the middle wear-resistant layer 21 can be increased (according to analysis, the adhesion of the middle wear-resistant layer can be increased from 3.8MPa to 9.2MPa), good adhesion between the anti-skid aggregate 22 and the middle wear-resistant layer 21 and the surface layer 3 is ensured, and the problems of cracking, falling off and the like are avoided. Meanwhile, the middle wear-resistant layer 21 with high adhesive force does not need to be coated for multiple times, only needs to be coated for one time, is high in manufacturing efficiency, and avoids the increase of VOC (volatile organic compounds) emission caused by multiple coating, so that the VOC emission of the coating structure in the preparation process is reduced, and the coating structure is environment-friendly, and is beneficial to the health of constructors.
The bottom layer 1 is an epoxy zinc-rich paint layer which is a double-component high-solid polyamide addition curing epoxy zinc-rich primer layer, and the epoxy zinc-rich paint layer is composed of superfine zinc powder, epoxy resin and a polyamide curing agent. Because the zinc powder in the epoxy zinc-rich paint layer has a difference value with the electrode potential of the beam body 200 of the rail beam 1000 which is generally made of steel, a corrosion galvanic cell is formed between the bottom layer 1 and the beam body 200, the standard electrode potential of the zinc is lower than that of iron and is more active than the iron, and the zinc is preferentially corroded as a sacrificial anode to protect the steel substrate of the cathode.
The epoxy zinc rich paint is a commercially available paint, and the components of the epoxy zinc rich paint are not the subject of the present invention, and the present invention is directed to applying the epoxy zinc rich paint to the primer layer 1. The epoxy zinc-rich paint covers the surface of the beam body 200 to provide a cathodic protection effect and isolate the beam body 200 from the outside air, so as to prevent rust and corrosion of the beam body 200.
When the coating structure 100 is coated on the beam body 200, the bottom layer 1 is coated on the beam body 200, and when the bottom layer 1 provided with the epoxy zinc-rich paint is coated on the surface of the beam body 200, the bottom layer 1 can be effectively and firmly attached to the surface of the beam body 200. Meanwhile, the bottom layer 1 can isolate the surface of the beam body 200 from the outside air, so as to play a role in cathodic protection, and the track beam 1000 has better corrosion resistance. When the epoxy zinc-rich paint is coated on the surface of the beam body 200, the epoxy zinc-rich paint can be effectively coated without sanding the surface of the beam body 200 to remove rust Sa2.5 (according to the standard GB8923-88 of the rust rating and the rust removal rating of the steel surface before coating, the Sa2.5 very thorough spraying or projecting rust removal is carried out, wherein the steel surface is free from attachments such as visible grease, dirt, oxide skin, paint coating and the like, any residual trace is only a slight spot-shaped or stripe-shaped color spot), the surface of the beam body 200 is sanded to the Sa2 level (according to the standard GB 8923-Sa 8923 standard of the rust rating and the rust removal rating of the steel surface before coating, the 2 level is thorough spraying or projecting rust removal, the material surface is free from visible grease and dirt, and the attachments such as the oxide skin, the iron, the paint coating and the like are basically removed, and the residues are firmly attached), firmly attached to the surface of the beam body 200.
Subsequently, the intermediate wear-resistant layer 21 may be coated on the bottom layer 1, specifically, the bottom layer 1 may be coated with an intermediate wear-resistant layer coating to form the intermediate wear-resistant layer 21, and when the intermediate wear-resistant layer 21 is not completely solidified, the anti-skid aggregate 22 may be attached to the intermediate wear-resistant layer 21 on the surface of the intermediate wear-resistant layer 21 by means of a special device (such as a catapult gun, etc.). The anti-skid aggregate 22 may be a hard block or granular object with various shapes, and is used to increase the friction coefficient of the surface of the coating structure 100 and prevent the vehicle from skidding when passing through the track beam 1000 coated with the coating structure 100. The intermediate wear layer 21 is used to fix the skid-resistant aggregate 22.
After the middle wear-resistant layer 21 fixes the antiskid aggregate 22, the middle wear-resistant layer 21 can be stressed by tools such as a scraper and the like, and the antiskid aggregate 22 which is not firmly attached to the middle wear-resistant layer 21 is scraped, so that the overall firmness of the coating structure after being manufactured can be further improved. Subsequently, the surface layer coating can be coated on the middle wear-resistant layer 21 and the anti-slip aggregate 22 in a high-pressure airless spraying manner, so that the wear-resistant layer 21 and the anti-slip aggregate 22 are protected, the anti-slip aggregate 22 is further fixed, and the adhesive force of the anti-slip aggregate 22 on the middle wear-resistant layer 21 is improved.
Specifically, bottom 1, middle wearing layer 21 and surface course 3 are epoxy glass scale lacquer layer, and bottom 1, middle wearing layer 21 and surface course 3 raw materials easily obtain from this, and are with low costs, and can guarantee that bottom 1, middle wearing layer 21 and surface course 3 material are the same, and the firm adhesion between bottom 1, middle wearing layer 21 and the surface course 3 of being convenient for is fixed.
Through research, the inventor finds that the solvent of the painting is generally volatile substances, the solid volume content of the painting of the existing coating for the track beam is generally low (generally 50% -60%), correspondingly, the solvent volume content of the painting of the existing coating for the track beam is relatively high (generally 40% -50%), and by reducing the volume content of the solvent of the painting to be below 30%, the coating structure 100 can be effectively and obviously ensured to reduce pungent odor when being coated on the surface of the beam body 200, reduce environmental pollution and protect the safety of operators. The coating structure can be prepared by only spraying a three-layer structure, so that the emission of volatile substances can be effectively reduced compared with the arrangement of more coatings.
Specifically, the solid volume content of the epoxy glass flake paint of the intermediate wear-resistant layer 21 and the solid volume content of the epoxy glass flake paint of the face layer 3 are both greater than 70% (e.g., 70%, 80%, 95%), i.e., the solid volume content of the epoxy glass flake paint of the intermediate wear-resistant layer 21 accounts for more than 70% of the entire volume of the epoxy paint of the intermediate wear-resistant layer 21, and the solid volume content of the epoxy glass flake paint of the face layer 3 accounts for more than 70% of the entire volume of the epoxy paint of the face layer 3. In other words, the solvent volume content of the epoxy paint of the intermediate wear layer 21 and the solvent volume content of the epoxy paint of the top layer 3 are both less than 30%. Thus, by reducing the solvent content of the epoxy paint, the emission of volatile substances during the construction of the track beam 1000 is reduced. It can also be understood that the volume content of the epoxy paint of the intermediate wear-resistant layer 21 after hard drying is more than 70% of the volume content of the epoxy paint of the intermediate wear-resistant layer 21 in the fluid state, and the volume content of the epoxy paint of the face layer 3 after hard drying is more than 70% of the volume content of the epoxy paint of the face layer 3 in the fluid state.
In addition, the solid volume content of the epoxy glass flake paint of the middle wear-resistant layer 21 and the solid volume content of the epoxy glass flake paint of the surface layer 3 are higher, so that the viscosity of the epoxy glass flake paint of the middle wear-resistant layer 21 and the viscosity of the epoxy glass flake paint of the surface layer 3 are higher, and when the middle wear-resistant layer 21 and the surface layer 3 are subjected to painting operation, the middle wear-resistant layer 21 and the surface layer 3 can reach the preset thickness only by being coated once. In the prior art, the solid volume content of the paint of the coating structure is low, the viscosity is low, and when each coating is painted, the preset thickness can be reached only by coating for many times. Thus, the present invention facilitates the painting operation of the coating structure 100 relative to the prior art.
In some specific embodiments, the surface layer 3 and the intermediate wear-resistant layer 21 are epoxy glass flake paint layers, each epoxy glass flake paint layer is a thick coating type protective paint layer composed of amine-cured epoxy resin and glass flakes, and each epoxy glass flake paint layer is composed of epoxy resin, glass flakes, pigment, amine curing agent, auxiliary agent, diluent and the like. It should be noted that the epoxy glass flake paint is a paint available on the market, and the components of the epoxy glass flake paint are not the point of the present invention, and the point of the present invention is to apply the epoxy glass flake paint to the surface layer 3 and the intermediate wear-resistant layer 21.
The glass flakes of the epoxy glass flake paint layer are arranged in a parallel stacking mode in the coating, and like labyrinth arrangement, a corrosion medium penetrates through the coating and needs to bypass the barrier layer by layer, so that the diffusion speed is reduced while the path of the corrosion medium diffusing to the base material is prolonged, the metal material is protected from corrosion, and the epoxy glass flake paint layer has good cohesiveness and wear resistance. Therefore, the surface layer 3 and the middle wear-resistant layer 21 both have good wear resistance, and when a vehicle passes through the track beam 1000 and the wheel of the vehicle rubs with the coating structure, the epoxy glass flake paint can effectively reduce the wear of the coating structure 100.
In other specific embodiments, the surface layer 3 and the intermediate wear-resistant layer 21 are both wear-resistant epoxy paint layers, the wear-resistant epoxy paint layers have different contents from the epoxy glass flake paint layers, the wear-resistant epoxy paint is epoxy paint added with wear-resistant particles, the wear-resistant particles are different from the epoxy glass flake paint, the wear-resistant epoxy paint is two-component high-solid-state performance-enhanced polyamine adduct cured epoxy paint, and the wear-resistant epoxy paint is two-component thick-paste epoxy finish paint composed of modified epoxy resin, coloring pigment, filler, amine curing agent, solvent and the like. It should be noted that the wear-resistant epoxy paint is a paint available on the market, and the components of the wear-resistant epoxy paint are not the point of the invention, and the point of the invention is to apply the wear-resistant epoxy paint to the surface layer 3 and the intermediate wear-resistant layer 21.
Specifically, the thickness of the bottom layer 1 is 40 to 80 μm, the thickness of the middle wear-resistant layer 21 is 400 to 500 μm, and the thickness of the surface layer 3 is 100 to 200 μm. Thus, the primer layer 1 having the epoxy zinc-rich paint has a sufficient thickness to achieve isolation of the beam body 200 from the external air, while the middle wear layer 21 has a sufficient thickness to fix the anti-slip aggregate 22, and the face layer 3 has a sufficient thickness to protect the anti-slip aggregate 22. In the embodiment of the present invention, the thickness of the middle wear-resistant layer 21 is greater than that of the bottom layer 1 and is also greater than that of the face layer 3, and the thickness of the face layer 3 is greater than that of the bottom layer 1. Like this, the thickness that sets up the middle wearing layer 21 in antiskid aggregate 22 both sides is enough big to guarantee the formation that this antiskid aggregate 22 can be stable in this coating structure, and carry out the thickness of preliminary fixed middle wearing layer 21 to antiskid aggregate 22 and be greater than the thickness of surface course 3, thereby can make antiskid aggregate 22 set up on roof beam body 200 steadily.
Specifically, the height difference of the uneven surface of the coating structure 100 is in the range of 145 μm to 630 μm, in other words, the height difference between the highest point and the lowest point of the coating structure 100 is in the range of 145 μm to 630 μm on the uneven surface formed on the side of the face layer 3. Therefore, the track beam 1000 has good drainage performance, meanwhile, the track beam 1000 can be guaranteed to have good stability, and the vehicle runs stably when running on the track beam 1000.
Specifically, the particle size of the anti-slip aggregate 22 is 30 to 80 mesh. Thus, the non-slip aggregate 22 has a suitable particle size to meet the coefficient of friction requirements of the surface of the coating structure 100.
In some specific embodiments, the non-slip aggregate 22 comprises: the quartz sand can enable the anti-skid aggregate 22 to have higher hardness, and the anti-skid aggregate 22 is prevented from being deformed or broken by the extrusion of vehicles when the vehicles pass through. The adding amount of the quartz sand is 0.8kg/m2～1.4kg/m2(e.g., 0.8 kg/m)2、1.2kg/m2、1.4kg/m2). Therefore, the quartz sand has proper density, and the friction coefficient of the surface of the coating structure 100 is large, so that the friction coefficient requirement of the surface of the coating structure 100 is met.
In other specific embodiments, the non-slip aggregate 22 comprises: the carborundum can make the anti-skid aggregate 22 have higher hardness, and the anti-skid aggregate 22 is prevented from being deformed or broken by the extrusion of the vehicle when the vehicle passes through. The addition amount of emery is 1.0kg/m2～1.6kg/m2(e.g., 1.0 kg/m)2、1.4kg/m2、1.6kg/m2). Therefore, the carborundum has proper density, and the friction coefficient of the surface of the coating structure 100 is large, so that the friction coefficient requirement of the surface of the coating structure 100 is met.
In further specific embodiments, the non-slip aggregate 22 comprises: corundum, corundum sand can make anti-skidding aggregate 22 have higher hardness, avoids anti-skidding aggregate 22 to receive the extrusion of vehicle and warp or breakage when the vehicle passes through. The adding amount of the corundum sand is 1.3kg/m2～1.9kg/m2(e.g., 1.3 kg/m)2、1.6kg/m2、1.9kg/m2). Thus, the corundum sand has proper density, and the friction coefficient of the surface of the coating structure 100 is large, so that the friction coefficient requirement of the surface of the coating structure 100 is met.
Alternatively, as shown in fig. 1, the skid-proof aggregate 22 is a layer and is laid on the side of the intermediate wear-resistant layer 21 facing the surface layer 3. Therefore, the middle layer 2 is simple in structure and convenient to manufacture, and only one layer of anti-skid aggregate 22 needs to be laid on the middle wear-resistant layer 21. Therefore, the surface layer 3 and the middle wear-resistant layer 21 both have good wear resistance, and when a vehicle passes through the track beam 1000 and the wheel of the vehicle rubs against the coating structure, the wear-resistant epoxy paint can effectively reduce the wear of the coating structure 100.
The method of constructing the coating structure 100 will now be described.
The construction method of the coating structure 100 sequentially comprises the construction steps of a bottom layer 1, a middle wear-resistant layer 21, an anti-slip aggregate 22 and a surface layer 3. In other words, when the coating structure 100 is constructed, the construction step of the bottom layer 1 of the zinc-rich epoxy paint layer, the construction step of the intermediate wear-resistant layer 21, the construction step of the anti-slip aggregate 22, and the construction step of the top layer 3 are sequentially performed.
Wherein, the construction steps of the bottom layer 1 comprise: on the beam body 100 of the dry and clean track beam 1000, a zinc-rich epoxy paint is uniformly applied in a high-pressure airless spraying/brushing/roller coating manner and is hard-dried to form a bottom layer 1. The high-pressure airless spraying is a spraying mode well known to those skilled in the art, the coating is pressurized to 9.8-29.4 MPa and then is sprayed out through a special olive-shaped nozzle, and when the high-pressure paint flow rushes out of the nozzle and enters the atmosphere, the high-pressure paint flow is immediately cracked and expanded and is broken into superfine paint mist to be directly sprayed on the surface of a workpiece.
The construction steps of the intermediate wear-resistant layer 21 include: and after the bottom layer 1 is completely cured, coating the intermediate wear-resistant layer 21 on the bottom layer 1 in a high-pressure airless spraying/brushing/roller coating mode. Wherein, the spraying mode of the middle wear-resistant layer 21 is consistent with that of the bottom layer 1.
The construction steps of the antiskid aggregate 22 include: before the intermediate wear-resistant layer 21 is hard dried, the anti-skid aggregate 22 is sprayed and attached to the intermediate wear-resistant layer 21 in a low-pressure spraying mode. The low pressure of the low pressure spraying herein means that the spraying pressure is lower than that when the top layer coating is sprayed. Therefore, the depth of the antiskid aggregate 22 entering the middle wear-resistant layer 21 during spraying is deep, and the antiskid aggregate 22 can be firmly and uniformly attached to the middle wear-resistant layer 21. After the intermediate wear-resistant layer 21 is hard-dried, the anti-slip aggregate 22 which is not firmly adhered to the intermediate wear-resistant layer 21 is scraped off by applying pressure. Wherein the pressure of the low-pressure spraying is 0.035 MPa.
For example, after the anti-slip aggregate 22 is coated on the intermediate wear-resistant layer 21, the intermediate wear-resistant layer 21 is waited for to be hard-dried so that the intermediate wear-resistant layer 21 adheres and fixes at least part of the anti-slip aggregate 22, and then a certain pressure can be applied to the intermediate wear-resistant layer 21 by a tool such as a scraper, and the insecure anti-slip aggregate 22 adhered on the intermediate wear-resistant layer 21 is scraped off and the scraped-off anti-slip aggregate 22 is recovered. Wherein the spreading amount of the antiskid aggregate 22 is 0.8kg/m2～1.9kg/m2I.e. at 1m2The beam body 200 of (1) needs to broadcast 0.8kg to 1.9kg of the anti-skid aggregates 22. It should be noted that, after many studies, the applicant found that the scraped-off anti-slip aggregate 22 does not account for the initial amount of scattering, and therefore, the scattering amount specified in the present invention is the scattering amount calculated by the scraped-off anti-slip aggregate 22. Therefore, the anti-slip aggregate 22 which is not firmly adhered to the middle wear-resistant layer 21 is scraped off by applying pressure in the construction step of the anti-slip aggregate 22, so that the anti-slip aggregate 22 is not easy to loosen after the coating structure 100 is manufactured, and the working reliability of the coating structure 100 is high.
Subsequently, a construction step of the facing 3 may be performed to cover the facing 3 on the intermediate wear-resistant layer 21 and the anti-slip aggregate 22.
Therefore, the anti-slip aggregate 22 which is not firmly adhered to the middle wear-resistant layer 21 is scraped off by applying pressure in the construction step of the anti-slip aggregate 22, so that the anti-slip aggregate 22 is not easy to loosen after the coating structure 100 is manufactured, and the working reliability of the coating structure 100 is high.
Specifically, the construction steps of the surface layer 3 include: after the intermediate wear-resistant layer 21 is hard-dried, the surface layer coating is sprayed on the intermediate wear-resistant layer 21 and the anti-skid aggregate 22 in a high-pressure airless spraying mode, so that the surface layer coating covers the anti-skid aggregate 22. The low pressure of the high-pressure airless spraying here means that the spraying pressure is higher than that when the anti-slip aggregate 22 is sprayed. Therefore, the surface layer 3 can further fix the middle wear-resistant layer 21 and the anti-skid aggregate 22, and the surface layer sprayed in the conventional process in the prior art only has the capability of isolating corrosion and does not have the strong capability of fixing the middle wear-resistant layer and the anti-skid aggregate. It is noted that during the preparation of the face layer 3, it is necessary to prepare a test panel without the slip-resistant aggregate as compared to the coating structure, thereby facilitating the determination of the thickness of the face layer 3.
Further, in a specific embodiment of the present invention, the bottom layer 1 of the coating structure 100 has a thickness of 80 μm, the intermediate wear-resistant layer 21 has a thickness of 400 μm, and the particle size of the anti-slip aggregate 22 is 1.0kg/m2The thickness of the surface layer 3 is 200 mu m, the surface layer 3 and the middle wear-resistant layer 21 are epoxy glass flake paint layers, the bottom layer 1 is a zinc-rich epoxy paint layer, and the height difference of the uneven surface of the coating structure 100 is 145 mu m-630 mu m. The coating structure 100 has the performance characteristics of corrosion resistance, artificial accelerated aging resistance, wear resistance, water resistance, oil resistance, strong adhesion and the like, wherein the salt spray resistance test of the coating structure 100 can reach 3000h, the artificial accelerated aging resistance can reach 1000h, the dry friction coefficient of the coating structure 100 is 0.93, the wet friction coefficient is 0.60, the wear resistance (1000g/1000r) is not more than 0.16g, the water resistance and the oil resistance are not less than 240h, the adhesion test can reach 9.2MPa, the high and low temperature resistance is good, and the coating structure can be cycled for 10 times at-50-70 ℃ without rusting, bubbling, cracking and peeling.
In one embodiment of the present invention, the bottom layer 1 of the coating structure 100 has a thickness of 80 μm, the intermediate wear-resistant layer 21 has a thickness of 400 μm, and the particle size of the anti-slip aggregate 22 is 1.1kg/m2The thickness of the surface layer is 200 mu m, the surface layer 3 and the middle wear-resistant layer 21 are both wear-resistant epoxy paint layers, the bottom layer 1 is a zinc-rich epoxy paint layer, and the height difference of the uneven surface of the coating structure 100 is 145 mu m-630 mu m. The coating structure 100 is tested to have the performance characteristics of corrosion resistance, artificial accelerated aging resistance, wear resistance, water resistance, oil resistance, strong adhesion and the like, wherein the dry friction coefficient of the coating structure 100 is 0.97, the wet friction coefficient is 0.61, the wear resistance (1000g/1000r) is not more than 0.15g, the water resistance and the oil resistance are not less than 240h, the adhesion force test is more than 5.8MPa, the salt spray resistance test can reach 5000h, the artificial accelerated aging resistance can reach 1000h, the high and low temperature resistance is good, the circulation is carried out for 10 times at-50 ℃ to 70 ℃, and the coating structure is not rusted, foamed, cracked or peeled.
It is worth mentioning that the standards for each performance test of the above examples are as follows:
(1) detecting the coating structure according to the standard of T0964-95 by using a BM-III type pendulum friction coefficient tester;
(2) detecting the adhesive force of the coating structure according to GB/T5210-2006 adhesion test by a paint and varnish pull-open method;
(3) detecting the wear resistance of the coating structure according to GB/T1768-2006 rotating rubber grinding wheel method for measuring the wear resistance of colored paint and varnish;
(4) detecting the salt spray resistance of the coating structure according to GB/T1771-2007 determination of neutral salt spray resistance of colored paint and varnish;
(5) the oil resistance of the coating structure is detected according to GB/T9274-1988 determination of liquid-resistant medium of colored paint and varnish;
(6) the water resistance of the coating structure is detected according to GB/T1733 + 1993 paint film water resistance determination method;
(7) detecting the high and low temperature resistance of the coating structure according to HG/T0004-2012 test method for cold and hot circulation of paint films of colored paint and varnish;
(8) and determining the anti-aging performance of the coating structure according to GB/T1865-2009 xenon arc radiation for artificial weathering and artificial radiation exposure filtration of colored paint and varnish.
A track beam 1000 of an embodiment of the present invention is described below.
A track beam 1000 of an embodiment of the invention is provided with a beam body 200 and a coating structure 100 as in any of the above described embodiments of the invention. At least a portion of the beam body 200 is provided with the coating structure 100.
Specifically, the beam body 200 has a vehicle running surface, which is a surface (including, but not limited to, a top surface of the beam body 200) that presses the beam body 200 when a vehicle runs on the track beam 1000.
According to the track beam 1000 provided by the embodiment of the invention, by arranging the coating structure 100, the track beam 1000 is simple to manufacture and high in production efficiency, the vehicle walking surface of the track beam 1000 can be ensured to have good corrosion resistance and large friction force, and the running safety of the vehicle on the track beam 1000 is ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A coating structure for a track beam, comprising: bottom, middle wearing layer, anti-skidding aggregate and surface course, the bottom is suitable for the setting to be in on the roof beam body of track roof beam, middle wearing layer is suitable for the coating and is in on the bottom, the surface course sets up middle wearing layer deviates from one side of bottom, anti-skidding aggregate is located middle wearing layer with between the surface course and all with middle wearing layer and the surface course is connected, anti-skidding aggregate is in middle wearing layer with form discontinuous fault between the surface course, so that coating structure forms unevenness's surface.
2. The coating structure for a track beam according to claim 1, wherein the bottom layer is a zinc-rich epoxy paint layer, and the top layer and the intermediate wear-resistant layer are both wear-resistant epoxy paint layers.
3. The coating structure for a track beam according to claim 2, wherein the thickness of the bottom layer is 40 to 80 μm, the thickness of the middle wear layer is 200 to 500 μm, and the thickness of the top layer is 100 to 200 μm.
4. The coating structure for a track beam according to claim 1, wherein the height difference of the rugged surface of the coating structure is in the range of 145 μm to 630 μm.
5. The coating structure for a track beam according to claim 1, wherein the anti-slip aggregate has a particle size of 30-80 mesh.
6. The coating structure for a track beam according to claim 1, wherein the scattering amount of the anti-slip aggregate is 0.8kg/m2～1.9kg/m2The anti-skid aggregate comprises one or more of quartz sand, carborundum or corundum sand.
7. A method of constructing a coated structure according to any of claims 1 to 6, comprising in sequence: a bottom layer construction step, a middle wear-resistant layer construction step, an anti-skid aggregate construction step and a surface layer construction step, wherein,
the construction steps of the anti-slip aggregate further comprise: and before the intermediate wear-resistant layer is hard dried, spraying the antiskid aggregate onto the intermediate wear-resistant layer.
8. The construction method according to claim 7, wherein the construction step of the anti-slip aggregate further comprises: and after the middle wear-resistant layer is hard dried, applying pressure to scrape the anti-skid aggregate which is not firmly attached to the middle wear-resistant layer.
9. The construction method according to claim 7, wherein the step of constructing the surface layer comprises: after the middle wear-resistant layer is hard-dried, spraying a surface layer coating on the middle wear-resistant layer and the anti-skid aggregate so that the surface layer coating covers the anti-skid aggregate.
10. A track beam, comprising a beam body having a track beam running surface and a coating structure according to any one of claims 1-6, said coating structure being adapted to be applied on said track beam running surface.
CN201910935455.5A 2019-09-29 2019-09-29 Coating structure for track beam, construction method of coating structure and track beam Pending CN112570237A (en)

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Application publication date: 20210330