CN112574636A - 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 PDFInfo
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- CN112574636A CN112574636A CN201910935410.8A CN201910935410A CN112574636A CN 112574636 A CN112574636 A CN 112574636A CN 201910935410 A CN201910935410 A CN 201910935410A CN 112574636 A CN112574636 A CN 112574636A
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- 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
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- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- 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
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- 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
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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, 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, and the bottom layer is a low-surface-treated epoxy wear-resistant glass flake paint layer. According to the coating structure disclosed by the invention, the coating structure is ensured to have excellent friction force and wear resistance, and meanwhile, the coating structure is convenient to manufacture and high in production efficiency.
Description
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 rail beam in the related art is exposed in the atmosphere, and is disturbed by weather factors, and a water film is formed on the surface of the rail beam in rainy weather, so that the surface friction coefficient of the rail beam is low. When the rail vehicle runs on the rail beam, wheels of the rail vehicle easily slip, and vehicle running accidents easily 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 increases the surface friction coefficient of the track beam at least to some extent.
The second aspect of the present invention provides a construction method of a coating structure capable of improving a surface friction coefficient of a track beam.
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, the bottom is low surface treatment epoxy wear-resisting glass scale paint layer.
According to the coating structure disclosed by the first aspect of the invention, the coating structure can be ensured to have excellent friction force and wear resistance, and meanwhile, the coating structure is convenient to manufacture and high in production efficiency.
Further, the surface layer and the middle wear-resistant layer are both: epoxy wear-resistant glass flake paint layer.
Furthermore, the thickness of the bottom layer is 80-120 μm, the thickness of the middle wear-resistant layer is 300-500 μm, and the thickness of the surface layer is 200-300 μm.
Further, the height difference of the rugged surface of the coating structure is in the range of 145 to 630 μm.
Further, the spreading amount of the anti-skid aggregate is 0.7kg/m2～1.8kg/m2The anti-skid aggregate comprises one or more of quartz sand, carborundum or corundum sand.
Further, the particle size of the anti-slip aggregate is 30-60 meshes.
Optionally, the facing layer and the intermediate wear layer are both: a low surface treatment epoxy wear-resistant glass flake paint layer.
The construction method of the coating structure according to the second aspect of the present invention comprises, in order: the construction steps of the bottom layer of the low surface treatment epoxy wear-resistant glass flake paint layer, the construction steps of the middle wear-resistant layer, the construction steps of the anti-skidding aggregate and the construction steps of the surface layer are as follows, wherein the construction steps of the anti-skidding 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 steps of the anti-skid aggregate comprise: 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 wear 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 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.
The invention is described below with reference to specific embodiments in conjunction with the accompanying drawings.
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.
Through research, the applicant finds that 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 the friction force and the wear resistance of the track beam. The wear-resistant layer with the structure has low production efficiency, low adhesive force and easy surface cracking.
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 (such as wear-resistant and anti-skid aggregate like 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), and thus, the good adhesion between the anti-skid aggregate 22 and the middle wear-resistant layer 21 and the surface layer 3 is ensured, the problems of cracking, falling and the like are avoided, the requirement on the surface cleanliness of the beam body 200 is reduced, the coating structure is suitable for the track beam which is put into use for a period of time, and the cost for arranging the coating structure on the track beam is. In addition, the middle wear-resistant layer 21 with high adhesive force does not need to be coated for multiple times, only needs to be coated once, is high in preparation 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, the coating structure is environment-friendly, and the coating structure is beneficial to the health of constructors.
In order to further reduce the requirement of the coating structure of the invention on the cleanliness of the beam body 200, the bottom layer 1 is set as a low-surface-treatment epoxy wear-resistant glass flake paint layer, and the low-surface-treatment epoxy wear-resistant glass flake paint is a two-component polyamine-cured low-surface-treatment epoxy paint doped with glass flakes. Meanwhile, the low-surface-treatment epoxy wear-resistant glass flake paint adopts resin with better permeability as a film forming substance, and is matched with active antirust pigment (such as red lead powder, iron red powder, composite ferrotitanium powder, aluminum tripolyphosphate zinc powder and the like) to passivate and stabilize active reaction groups in a firm rust layer, so that a stable and compact protective coating is formed. It should be noted that the low-surface-treatment epoxy wear-resistant glass flake paint is a paint available on the market, and the components of the low-surface-treatment epoxy wear-resistant glass flake paint are not the invention point of the invention, and the invention point of the invention is that the low-surface-treatment epoxy wear-resistant glass flake paint is applied to the bottom layer 1, the surface layer 3 and the middle wear-resistant layer 21. The low-surface-treatment epoxy wear-resistant glass flake paint has better wear resistance, corrosion resistance and higher adhesiveness.
Thus, when the coating structure 100 is coated on the beam body 200, the bottom layer 1 is firstly coated on the beam body 200, and when the bottom layer 1 of the low-surface-treatment epoxy wear-resistant glass flake paint is coated on the surface of the beam body 200, the surface of the beam body 200 is not required to be sanded to the Sa2.5 derusting grade (according to the standard GB8923-88 of the rust rating and the rust removing rating of the steel surface before coating, the Sa2.5 grade is quite thoroughly sprayed or cast for derusting, wherein the steel surface is required to have no visible attachments such as grease, dirt, oxide skin and paint coating, any residual trace is required to be only a slight punctiform or striped color spot), the surface of the beam body 200 is only required to be sanded to the Sa2 grade (according to the standard GB8923-88 of the rust rating and the rust removing rating of the steel surface before coating, the Sa2 grade is thoroughly sprayed or cast for derusting, the material surface is required to have no visible attachments such as grease, dirt and the oxide, the residues thereof are firmly attached), i.e., the low-surface-treatment epoxy wear-resistant glass flake paint 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 that the track beam 1000 has better wear resistance.
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 (surface dried), 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 (e.g., a catapult gun, etc.). The anti-skid aggregate 22 may be a hard block or granular object having various shapes, and is used to increase the friction coefficient of the surface of the coating structure 100 and prevent a vehicle from skidding while 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 the wear-resisting glass scale lacquer layer of epoxy, and bottom 1, middle wearing layer 21 and 3 raw materials of surface course are easily acquireed 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. The glass flakes of the epoxy wear-resistant 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 being corroded, and the epoxy wear-resistant glass flake paint layer has good cohesiveness and wear resistance.
More specifically, bottom 1, middle wearing layer 21 and surface course 3 are low surface treatment epoxy wear-resisting glass scale lacquer layer, can further guarantee from this 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. 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.
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.
Thus, in some alternative embodiments of the present invention, the solid volume content of the low surface treatment epoxy abrasion resistant glass flake paint of base layer 1, the solid volume content of the low surface treatment epoxy abrasion resistant glass flake paint of intermediate abrasion resistant layer 21, and the solid volume content of the low surface treatment epoxy abrasion resistant glass flake paint of face layer 3 are each greater than 70% (e.g., 70%, 80%, 95%), namely, the solid volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the bottom layer 1 accounts for more than 70% of the whole volume of the low-surface-treatment epoxy wear-resistant glass flake paint of the bottom layer 1, the solid volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the intermediate wear-resistant layer 21 accounts for more than 70% of the whole volume of the low-surface-treatment epoxy wear-resistant glass flake paint of the intermediate wear-resistant layer 21, and the solid volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the surface layer 3 accounts for more than 70% of the whole volume of the low-surface-treatment epoxy wear-resistant glass. It can also be understood that the volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the intermediate wear-resistant layer 21 after being hard-dried accounts for more than 70% of the volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the intermediate wear-resistant layer 21 in a fluid state, and the volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the surface layer 3 after being hard-dried accounts for more than 70% of the volume content of the low-surface-treatment epoxy wear-resistant glass flake paint of the surface layer 3 in the fluid state.
In other words, the solvent content of the low surface treatment epoxy abrasion-resistant glass flake paint of the bottom layer 1, the middle abrasion-resistant layer 21 and the surface layer 3 is less than 30% by volume. 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. 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.
In addition, the solid volume content of the epoxy paint of the bottom layer 1, the solid volume content of the epoxy paint of the middle wear-resistant layer 21 and the solid volume content of the epoxy paint of the surface layer 3 are high, so that the viscosity of the epoxy paint of the bottom layer 1, the viscosity of the epoxy paint of the middle wear-resistant layer 21 and the viscosity of the epoxy paint of the surface layer 3 are high, and when the bottom layer 1, the middle wear-resistant layer 21 and the surface layer 3 are subjected to painting operation, the bottom layer 1, the middle wear-resistant layer 21 and the surface layer 3 can reach the preset thickness only by coating 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.
Specifically, the thickness of the bottom layer 1 is 80 to 120 μm, the thickness of the middle wear-resistant layer 21 is 300 to 500 μm, and the thickness of the surface layer 3 is 200 to 300 μm. Thus, the bottom layer 1 having the low surface treatment epoxy abrasion resistant glass flake paint has a sufficient thickness to achieve isolation of the beam body 200 from the outside air, while the middle abrasion 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 not less than the thickness of the bottom layer 1, and is not less than the thickness of the surface layer 3, and the thickness of the surface layer 3 and the thickness of the middle wear-resistant layer 21 are both greater than the thickness of the bottom layer 1. Like this, the thickness of the middle wearing layer 21 of setting in anti-skidding aggregate 22 both sides and the thickness of surface course 3 are enough big thereby guarantee the formation that this anti-skidding aggregate 22 can be stable in this coating structure, and carry out the thickness of the middle wearing layer 21 of preliminary fixing to anti-skidding aggregate 22 and be not less than the thickness of surface course 3 to can make anti-skidding 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.
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 0.7kg/m2～1.3kg/m2(e.g., 0.7 kg/m)2、1.1kg/m2、1.3kg/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 of the surface of the coating structure 100 is satisfiedAnd (4) demand.
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 0.9kg/m2～1.5kg/m2(e.g., 0.9 kg/m)2、1.2kg/m2、1.5kg/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 1.2kg/m2～1.8kg/m2(e.g., 1.2 kg/m)2、1.5kg/m2、1.8kg/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.
Specifically, the particle size of the anti-slip aggregate 22 is 30 to 60 meshes. 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.
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 wear-resistant layer 21 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.
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 of a low-surface-treatment epoxy wear-resistant glass flake paint layer, a middle wear-resistant layer 21, an anti-skid 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 low-surface-treated epoxy abrasion-resistant glass flake paint layer, the construction step of the intermediate abrasion-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 step of the bottom layer 1 of the low surface treatment epoxy wear-resistant glass flake paint layer comprises the following steps: uniformly applying a low-surface-treatment epoxy wear-resistant glass flake paint on a beam body 200 of a dry and clean track beam 1000 in a high-pressure airless spraying/brushing/roller coating manner, and hard-drying to form a bottom layer 1, wherein the thickness of the hard-dried bottom layer 1 is 80-120 microns. 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: after the bottom layer 1 is completely cured, coating the middle wear-resistant layer 21 on the bottom layer 1 in a high-pressure airless spraying/brushing/roller coating mode, wherein the thickness of the hard-dried middle wear-resistant layer is 300-500 microns. 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. 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. Wherein the antiskid boneThe spreading amount of the material 22 is 0.7kg/m2～1.8kg/m2I.e. at 1m2The beam body 200 of (1) needs to broadcast 0.7kg to 1.8kg 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.
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.
The coating structure 100 was subjected to the performance tests shown in table 1, it being understood that the test results for the coating structure are the average of the test results for a plurality of points on the same line, with specific reference to the following criteria:
(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.
It was determined that the coating structure 100 of the embodiments of the invention meets the following performance criteria:
TABLE 1 test results for the coating structure of the invention
Table 1 performance test results and methods for coating architecture 100
According to the result, the paint film adhesive force of the coating structure is 6.8MPa and is obviously higher than the adhesive force of the coating structure formed by constructing the mixture of the anti-skid aggregate and the paint in a spraying/rolling coating mode by 3.6MPa, so that the adhesive force between the anti-skid aggregate and the intermediate wear-resistant layer 21 and the surface layer 3 is ensured, the problems of cracking, falling and the like of the coating structure are avoided, the coating structure has good salt spray resistance, oil resistance, water resistance, high and low temperature resistance and aging resistance, the coating structure can be suitable for severe environments, the universality of the coating structure is improved, and the service life of the coating structure is prolonged.
In addition, as the anti-skid aggregate of the coating structure is arranged between the middle wear-resistant layer 21 and the surface layer 3 and is provided with the uneven surface, the friction coefficient of the coating structure is larger than that of the coating structure formed after the anti-skid aggregate and the paint are mixed, so that the friction coefficient of the coating structure, including the dry friction coefficient and the wet friction coefficient, is increased to a certain extent. The raised anti-slip aggregate 22 can deform the rubber tire to a certain extent when contacting the tire, and plays a role in anchoring, so that the friction coefficient of the whole coating structure and a rail vehicle is remarkably increased. In rainy days, continuous water films cannot be formed on the uneven surfaces of the coating structures, so that the friction coefficient caused by the water films is greatly reduced to a great extent, and the wet friction coefficient of the coating structures is increased.
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 traveling surface of the track beam 1000 can be ensured to have good wear resistance and large friction force, and the traveling 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 (11)
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, the bottom is low surface treatment epoxy wear-resisting glass scale paint layer.
2. The coating structure for a track beam according to claim 1, wherein the facing layer and the intermediate wear layer are each: epoxy wear-resistant glass flake paint layer.
3. The coating structure for a track beam according to claim 1, wherein the thickness of the bottom layer is 80 to 120 μm, the thickness of the middle wear layer is 300 to 500 μm, and the thickness of the top layer is 200 to 300 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 non-slip boneThe spreading amount of the material is 0.7kg/m2～1.8kg/m2The anti-skid aggregate comprises one or more of quartz sand, carborundum or corundum sand.
6. The coating structure for a track beam according to claim 1, wherein the anti-slip aggregate has a particle size of 30-60 mesh.
7. The coating structure for a track beam according to claim 2, wherein the facing layer and the intermediate wear layer are each: a low surface treatment epoxy wear-resistant glass flake paint layer.
8. A method of constructing a coated structure according to any of claims 1 to 7, comprising in sequence: the construction steps of the bottom layer of the low surface treatment epoxy wear-resistant glass flake paint layer, the construction steps of the middle wear-resistant layer, the construction steps of the anti-skidding aggregate and the construction steps of the surface layer are as follows, wherein the construction steps of the anti-skidding aggregate further comprise: and before the intermediate wear-resistant layer is hard dried, spraying the antiskid aggregate onto the intermediate wear-resistant layer.
9. The construction method according to claim 8, wherein the construction step of the anti-slip aggregate 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.
10. The construction method according to claim 8, 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.
11. A track beam, comprising a beam body having a vehicle running surface and a coating structure according to any one of claims 1-7, said coating structure being adapted to be applied on said vehicle running surface.
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Application publication date: 20210330 |