Railway switch sliding plate self-lubricating repairing spray and preparation process thereof

Abstract

The invention belongs to the technical field of solid lubrication, and discloses a self-lubricating repairing spray for a railway switch sliding plate and a preparation process of the self-lubricating repairing spray. The self-lubricating repairing spray comprises the following components in parts by weight: 15-20 parts of an adhesive, 16-21 parts of a lubricant, 5-8 parts of a wear-resistant agent, 0.22-0.4 part of an auxiliary agent and 35-45 parts of an organic solvent, the adhesive adopts epoxy modified polyimide resin, and the lubricant is selected from one or more of molybdenum disulfide, tungsten disulfide and polytetrafluoroethylene. The self-lubricating repairing spray is used for spraying and repairing a sliding plate which is worn after being used for a period of time, the lubricating and wear-resisting performance of the sliding plate can be effectively kept, switch equipment maintenance is facilitated, a new sliding plate does not need to be replaced or lubricating paint does not need to be smeared again, the labor intensity of maintenance workers and the equipment cost are greatly reduced, and the maintenance efficiency is improved. And the normal operation of the railway switch is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of solid lubrication, and relates to a lubricating repair agent specially used for railway switch slides, in particular to a self-lubricating repair spray for railway switch slides and a preparation process thereof. Background Art

[0002] Railways are a major form of transportation, serving as a vital national infrastructure and a popular means of transportation. There are 5,594 railway stations in China, including 50 special-class stations, 236 first-class stations, 353 second-class stations, 939 third-class stations, and 3,966 other types. The average number of switch assemblies per station is 100, 80, 60, 50, and 10, respectively. Each set requires 16 to 32 slides, meaning 3 to 5 million slides are currently in use daily. Taking into account inventory and turnover, this represents a significant number.

[0003] Currently, almost all railway switch slides are lubricated using traditional methods, such as adding lubricating oil or applying grease. Auxiliary switch slides have an automatic detection system. If the reading falls below the specified value, maintenance workers are required to apply grease on the track. This requires frequent re-applying grease, which is highly unsafe and labor-intensive. Furthermore, grease easily absorbs dust and sand during use, forming sludge over time, reducing lubrication performance and even increasing the coefficient of friction, hindering the normal operation of the slide.

[0004] To address the aforementioned shortcomings of traditional lubrication methods involving lubricating oil or applying grease, our company has developed a lubricating, wear-resistant coating for railway switch slides. This coating, which applies a layer of molybdenum disulfide lubricating, wear-resistant coating to the surface of the switch slides, effectively resolves friction or vibration issues between the slides, significantly reducing the coefficient of friction, lowering noise, and increasing smoothness and anti-jamming properties. However, it is inevitable that after long-term use as a lubricant for railway switch slides, the film layer between the slides will wear out to a certain extent, seriously shortening the service life of the slides. New slides must be replaced, which not only affects the normal operation of railway switch slides but also increases the labor intensity and maintenance costs of maintenance workers.

[0005] In addition, the public documents "Preparation and Friction Performance Research of MoS2 Coating on 15-5PH Stainless Steel Surface, Zhang Xiangfeng, China Academic Dissertation Database, 2022", "Research on the Tribological Performance of Molybdenum Disulfide Composite Solid Lubricating Coating on Spherical Bearings, Li Zhengguo, Qiu Ming, etc., China Academic Conference Paper Database, 2013" and public patents CN2021114921863, CN2020103337900, CN2017107106674, JP2004227685 all disclose lubricants using molybdenum disulfide as the main component of the self-lubricating layer. However, these molybdenum disulfide lubricants generally have problems of poor adhesion and poor wear resistance when used as coatings for railway switch slides, and cannot meet the use requirements of railway switch slides with ultra-large loads, high-frequency collisions, and multiple frictions; and there is also the problem that they cannot be repaired in time after wear, and can only be replaced with new slides, which affects the normal operation of railway switches. Summary of the Invention

[0006] In order to solve the above-mentioned defects commonly existing in traditional lubricating oil lubrication methods and existing molybdenum disulfide lubricants, the present invention proposes a railway switch slide self-lubricating repair spray and its preparation process, which can spray and repair worn slides to maintain the lubrication and wear resistance of the slides.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The first aspect of the present invention is to provide a railway switch slide self-lubricating repair spray, which comprises the following components by weight: 15 to 20 parts of adhesive, 16 to 21 parts of lubricant, 5 to 8 parts of wear-resistant agent, 0.22 to 0.4 parts of auxiliary agent and 35 to 45 parts of organic solvent;

[0009] Wherein, the adhesive is epoxy-modified polyimide resin; the lubricant is selected from one or more of molybdenum disulfide, tungsten disulfide and polytetrafluoroethylene.

[0010] Preferably, the lubricant contains 10-12 parts of molybdenum disulfide, 5-7 parts of tungsten disulfide, and 1-2 parts of polytetrafluoroethylene.

[0011] Preferably, the wear-resistant agent is silicon nitride, boron carbide, and silicon dioxide;

[0012] Among them, the silicon nitride is 3-4 parts, the boron carbide is 1.5-2.5 parts, and the silicon dioxide is 0.5-1.5 parts.

[0013] Preferably, the auxiliary agent is a dispersant, a film-forming agent, and an anti-skinning agent, which are used together;

[0014] The dispersant is BYK163; the film-forming agent is Dow DALPAD 292; and the anti-skinning agent is Walker VOK-Anti Skin 0445.

[0015] More preferably, and even more preferably, BYK163 0.1-0.2 parts, Dow DALPAD 292 0.06-0.1 parts, and Walker VOK-Anti Skin 0445 0.06-0.09 parts.

[0016] Preferably, the organic solvent is selected from one or both of cyclohexanone and N-methylpyrrolidone.

[0017] More preferably, the organic solvent contains 8 to 12 parts of N-methylpyrrolidone and 28 to 32 parts of cyclohexanone.

[0018] Preferably, the following components are included in parts by weight: 15-20 parts of epoxy modified polyimide resin, 10-12 parts of molybdenum disulfide, 5-7 parts of tungsten disulfide, 1-2 parts of polytetrafluoroethylene, 3-4 parts of silicon nitride, 1.5-2.5 parts of boron carbide, 0.5-1.5 parts of silicon dioxide, 0.1-0.2 parts of BYK163, 0.06-0.1 parts of Dow DALPAD 292, 0.06-0.09 parts of Walker VOK-Anti Skin0445, 8-12 parts of N-methylpyrrolidone, 28-32 parts of cyclohexanone, etc.

[0019] The second aspect of the present invention is to provide a preparation process of the railway switch slide self-lubricating repair spray, comprising the following steps:

[0020] (1) Mix organic solvents N-methylpyrrolidone and cyclohexanone in proportion, and disperse and stir for 5 minutes at a speed of 30 rpm;

[0021] (2) Add dispersant, film-forming agent and anti-skinning agent in proportion, stir for 5 minutes at 30 rpm;

[0022] (3) Add epoxy modified polyimide resin as adhesive in proportion and stir for 10 minutes at 60 rpm;

[0023] (4) Lubricants of molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and wear-resistant agents of silicon nitride, boron carbide, and silicon dioxide powder were added in proportion and stirred for 30 minutes at a speed of 90 rpm;

[0024] (5) The mixed liquid obtained above is added to a grinder and ground three times. The viscosity is detected to be 20±2S (Zai En No. 2 cup), and the fineness is detected to be 15±2 microns. The grinding liquid can be used as a self-lubricating repair spray.

[0025] Preferably, the preparation process further comprises the following steps:

[0026] Take the grinding liquid prepared in the above step (5), add it to the spray can, install the spray valve, and seal it with a pressure cover; fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0027] A third aspect of the present invention is to provide a self-lubricating wear-resistant coating specifically suitable for use as a base layer for repairing the self-lubricating repair spray. The self-lubricating wear-resistant coating is formed by spraying and curing the self-lubricating wear-resistant coating. When the self-lubricating wear-resistant coating experiences wear during use, the self-lubricating repair spray can be applied to repair the coating, thereby maintaining its wear resistance and self-lubricating properties. This facilitates maintenance of switch equipment and eliminates the need for the high-frequency application of grease, significantly reducing the labor intensity of maintenance workers.

[0028] Preferably, the self-lubricating wear-resistant coating adopts the formula: 18 parts of epoxy modified polyamide resin, 32 parts of epoxy modified polyimide resin, 8 parts of molybdenum disulfide, 6 parts of tungsten disulfide, 1 part of graphite, 2 parts of Teflon, 1 part of iron oxide, 10 parts of silicon nitride, 3 parts of silicon carbide, 3 parts of silicon dioxide, 0.4 parts of graphene powder, 0.35 parts of BYK 2013 dispersant, 0.1 parts of BYK 331 leveling agent, 0.12 parts of BYK-420 rheological agent, 10 parts of xylene, 3 parts of cyclohexanone, and 3 parts of NN-dimethylacetamide.

[0029] Preferably, the self-lubricating wear-resistant coating is prepared by the following method:

[0030] (1) Organic solvent mixing: Add 10 kg of xylene, 3 kg of cyclohexanone and 3 kg of NN-dimethylacetamide into the dispersion barrel in sequence, with an interval of 3 minutes between each addition. Stir for 15 minutes after adding the materials at a speed of 50 rpm. The stirring and dispersion barrel and the stirrer must be grounded to prevent static sparks.

[0031] (2) Adding additives: Add 0.35 kg of BYK 2013 dispersant, 0.1 kg of BYK 331 leveling agent and 0.12 kg of BYK-420 rheological agent to the dispersion tank in sequence, with an interval of 5 minutes between each addition. Stir for 20 minutes after adding the materials at a speed of 80 rpm.

[0032] (3) Adding polymer adhesive: First, add 18 kg of epoxy modified polyamide resin to the above dispersion barrel, disperse and stir at 60 rpm for 30 minutes, then add 32 kg of epoxy modified polyimide resin, disperse and stir at 60 rpm for 30 minutes.

[0033] (4) Adding powder: Add lubricant, anti-wear agent and hardening agent to the dispersion barrel in proportion and stir and disperse them. The interval between two additions is 5 minutes, and the rotation speed is 60 rpm; the lubricant is pre-mixed with 8 kg of molybdenum disulfide, 6 kg of tungsten disulfide, 1 kg of graphite, 2 kg of Teflon and 1 kg of iron oxide; the anti-wear agent is pre-mixed with 10 kg of silicon nitride, 3 kg of boron carbide and 3 kg of silicon dioxide; the hardening agent is 0.4 kg of graphene powder.

[0034] (5) Coating grinding: Add the above-obtained liquid into a horizontal grinder and grind for 2 to 5 times. The grinder speed is 3000 rpm and the liquid temperature is controlled at less than 40°C.

[0035] (6) Paint Filtration: The ground material liquid is filtered through a high-speed centrifugal filter to obtain a gray liquid. The paint viscosity is tested to be 40±5S (Zai En No. 2 cup) and the average paint fineness is tested to be 10±2 microns, which means the paint is qualified. If the paint viscosity is high, add diluent to dilute it and retest the viscosity and fineness.

[0036] (7) Product packaging: put the above qualified coating into 1kg packaging pot and set aside.

[0037] The fourth aspect of the present invention is to provide an application of a self-lubricating repair spray for a railway switch slide for repairing the coating of a railway switch slide. When in use, the self-lubricating repair spray for a railway switch slide is evenly sprayed on the worn area of the slide from a distance of 15 to 25 cm. After quick drying, the coating thickness is 15 to 20 microns.

[0038] The present invention adopts the above technical solution, which has the following technical effects compared with the prior art:

[0039] The self-lubricating repair spray provided by the present invention is prepared by mixing solid lubricating materials, polymer adhesives, and wear-resistant materials into an aerosol can, and then filling it with propellant to make a special self-lubricating repair spray. The spray can be used to repair the wear of the slide plate after it has been worn out after a period of use. The lubricating and wear-resistant properties of the slide plate can be effectively maintained, and the maintenance of the switch equipment is facilitated. There is no need to replace new slide plates or re-apply lubricating paint, which greatly reduces the labor intensity and equipment costs of maintenance workers and ensures the normal operation of railway switches. DETAILED DESCRIPTION

[0040] The present invention will be described in detail and specifically below through specific examples to provide a better understanding of the present invention, but the following examples do not limit the scope of the present invention.

[0041] Example 1

[0042] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 1 below.

[0043] Table 1 Raw material selection and dosage

[0044]

[0045] According to the component formula in Table 1 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0046] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0047] (2) Add the additives in order, adding 0.1 kg of dispersant, 0.06 kg of film-forming agent, and 0.08 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0048] (3) Add 15 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0049] (4) Add lubricant molybdenum disulfide powder 10 kg, tungsten disulfide powder 7 kg, polytetrafluoroethylene 1 kg and wear-resistant agent boron nitride 3.5 kg, boron carbide 2 kg, silicon dioxide 0.5 kg in proportion, stir for 30 minutes, speed 90 rpm;

[0050] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0051] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0052] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0053] Example 2

[0054] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 2 below.

[0055] Table 2 Raw material selection and dosage

[0056]

[0057] According to the component formula in Table 2 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0058] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0059] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.08 kg of film-forming agent and 0.08 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0060] (3) Add 15 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0061] (4) Add lubricants of molybdenum disulfide powder (12 kg), tungsten disulfide powder (5 kg), polytetrafluoroethylene (1.2 kg), and wear-resistant agents of boron nitride (3.5 kg), boron carbide (2 kg), and silicon dioxide (0.5 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0062] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0063] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0064] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0065] Example 3

[0066] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 3 below.

[0067] Table 3 Raw material selection and dosage

[0068]

[0069] According to the component formula in Table 3 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0070] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0071] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.06 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0072] (3) Add 18 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at 60 rpm;

[0073] (4) Add lubricants of molybdenum disulfide powder (10 kg), tungsten disulfide powder (6 kg), polytetrafluoroethylene (2 kg), and wear-resistant agents of boron nitride (3.5 kg), boron carbide (2.5 kg), and silicon dioxide (1 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0074] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0075] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0076] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0077] Example 4

[0078] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 4 below.

[0079] Table 4 Raw material selection and dosage

[0080]

[0081] According to the component formula in Table 4 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0082] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0083] (2) Add the additives in order, adding 0.12 kg of dispersant, 0.08 kg of film-forming agent, and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0084] (3) Add 18 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at 60 rpm;

[0085] (4) Add lubricants of molybdenum disulfide powder (12 kg), tungsten disulfide powder (5 kg), polytetrafluoroethylene (1.5 kg), and wear-resistant agents of boron nitride (4 kg), boron carbide (2.5 kg), and silicon dioxide (1.5 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0086] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0087] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0088] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0089] Example 5

[0090] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 5 below.

[0091] Table 5 Raw material selection and dosage

[0092]

[0093] According to the component formula in Table 5 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0094] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0095] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.08 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0096] (3) Add 15 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0097] (4) Add lubricants of molybdenum disulfide powder 10 kg, tungsten disulfide powder 7 kg, polytetrafluoroethylene 2 kg, and wear-resistant agents of boron nitride 4 kg, boron carbide 2.5 kg, and silicon dioxide 1.5 kg in proportion, and stir for 30 minutes at 90 rpm;

[0098] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0099] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0100] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0101] Example 6

[0102] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 6 below.

[0103] Table 6 Raw material selection and dosage

[0104]

[0105] According to the component formula in Table 6 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0106] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0107] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.08 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0108] (3) Add 15 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0109] (4) Add lubricants of molybdenum disulfide powder (10 kg), tungsten disulfide powder (6 kg), polytetrafluoroethylene (2 kg), and wear-resistant agents of boron nitride (3.5 kg), boron carbide (1.5 kg), and silicon dioxide (0.5 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0110] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0111] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0112] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0113] Example 7

[0114] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 7 below.

[0115] Table 7 Raw material selection and dosage

[0116]

[0117] According to the component formula in Table 7 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0118] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0119] (2) Add the additives in order, adding 0.1 kg of dispersant, 0.06 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0120] (3) Add 120 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0121] (4) Add lubricant molybdenum disulfide powder 10 kg, tungsten disulfide powder 5 kg, polytetrafluoroethylene 1 kg and wear-resistant agent boron nitride 3 kg, boron carbide 2 kg, silicon dioxide 1 kg in proportion, stir for 30 minutes at 90 rpm;

[0122] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0123] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0124] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0125] Example 8

[0126] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 8 below.

[0127] Table 8 Raw material selection and dosage

[0128]

[0129] According to the component formula in Table 8 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0130] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0131] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.08 kg of film-forming agent and 0.08 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0132] (3) Add 20 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0133] (4) Add lubricants of molybdenum disulfide powder (12 kg), tungsten disulfide powder (5 kg), polytetrafluoroethylene (1 kg), and wear-resistant agents of boron nitride (4 kg), boron carbide (2.5 kg), and silicon dioxide (1.5 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0134] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0135] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0136] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0137] Example 9

[0138] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 9 below.

[0139] Table 9 Raw material selection and dosage

[0140]

[0141] According to the component formula in Table 9 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0142] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0143] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.08 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0144] (3) Add 20 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0145] (4) Add lubricants of molybdenum disulfide powder 10 kg, tungsten disulfide powder 7 kg, polytetrafluoroethylene 2 kg, and wear-resistant agents of boron nitride 3 kg, boron carbide 1.5 kg, and silicon dioxide 0.5 kg in proportion, and stir for 30 minutes at 90 rpm;

[0146] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0147] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0148] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0149] Example 10

[0150] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 10 below.

[0151] Table 10 Raw material selection and dosage

[0152]

[0153] According to the component formula in Table 10 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0154] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0155] (2) Add the additives in order, adding 0.2 kg of dispersant, 0.1 kg of film-forming agent and 0.08 kg of anti-skinning agent in proportion, stirring for 5 minutes at a speed of 30 rpm;

[0156] (3) Add 20 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0157] (4) Add lubricants of molybdenum disulfide powder (12 kg), tungsten disulfide powder (7 kg), polytetrafluoroethylene (2 kg), and wear-resistant agents of boron nitride (4 kg), boron carbide (2.5 kg), and silicon dioxide (1.5 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0158] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0159] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0160] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0161] Comparative Example 1

[0162] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 11 below.

[0163] Table 11 Raw material selection and dosage

[0164]

[0165] According to the component formula in Table 11 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0166] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0167] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.06 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0168] (3) Add 10 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0169] (4) Add lubricants of molybdenum disulfide powder (10 kg), tungsten disulfide powder (6 kg), polytetrafluoroethylene (2 kg), and wear-resistant agents of boron nitride (3.5 kg), boron carbide (2.5 kg), and silicon dioxide (1 kg) in proportion, and stir for 30 minutes at 90 rpm.

[0170] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0171] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0172] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0173] Comparative Example 2

[0174] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 12 below.

[0175] Table 12 Raw material selection and dosage

[0176]

[0177] According to the component formula in Table 12 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0178] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0179] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.06 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0180] (3) Add 18 kg of epoxy-modified polyimide resin as adhesive in proportion and stir for 10 minutes at 60 rpm;

[0181] (4) Add lubricants of molybdenum disulfide powder 15 kg, tungsten disulfide powder 3 kg, polytetrafluoroethylene 4 kg, and wear-resistant agents of boron nitride 6 kg, boron carbide 1 kg, and silicon dioxide 3 kg in proportion, and stir for 30 minutes at 90 rpm;

[0182] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0183] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0184] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0185] Comparative Example 3

[0186] A self-lubricating repair spray for railway switch slides is prepared from five components: an adhesive, a lubricant, a wear-resistant agent, an additive, and an organic solvent. The raw material selection and dosage of each component are shown in Table 13 below.

[0187] Table 13 Raw material selection and dosage

[0188]

[0189] According to the component formula in Table 13 above, the preparation process of the railway switch slide self-lubricating repair spray includes the following steps:

[0190] (1) Mix 10 kg of organic solvent N-methylpyrrolidone and 30 kg of cyclohexanone, and stir them for 5 minutes at a speed of 30 rpm;

[0191] (2) Add the additives in order, adding 0.15 kg of dispersant, 0.06 kg of film-forming agent and 0.06 kg of anti-skinning agent in proportion, stirring for 5 minutes at 30 rpm;

[0192] (3) Add 25 kg of epoxy modified polyimide resin as adhesive in proportion and stir for 10 minutes at a speed of 60 rpm;

[0193] (4) Add lubricants of molybdenum disulfide powder 10 kg, tungsten disulfide powder 7 kg, polytetrafluoroethylene 2 kg, and wear-resistant agents of boron nitride 3 kg, boron carbide 1.5 kg, and silicon dioxide 0.5 kg in proportion, and stir for 30 minutes at 90 rpm;

[0194] (5) Add the mixed solution obtained above into a grinder and grind it three times. The viscosity is tested to be 20±2S (Zai En No. 2 cup) and the fineness is tested to be 15±2 μm. The grinding liquid can be used as a self-lubricating repair spray.

[0195] (6) Take the grinding liquid obtained above, add it to the spray tank, install the spray valve, and seal it with a gland;

[0196] (7) Fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

[0197] Performance Testing

[0198] 1. Preparation of test substrate:

[0199] Using an experimental iron plate as the substrate, a self-lubricating, wear-resistant coating was sprayed onto the surface of the plate and then heated to 230°C for 30 minutes to cure, resulting in a dry film thickness of 25 microns. This produced a self-lubricating, wear-resistant skateboard substrate. Simulating the operation of a railway switchboard, the same degree of wear was then produced on the skateboard specimens.

[0200] 2. Preparation of test samples:

[0201] The self-lubricating repair sprays prepared in the above Examples 1-10 and Comparative Examples 1-3 were respectively sprayed back and forth on the damaged surface of each test substrate, with the spray distance maintained at about 20 cm. The sprays were naturally dried and solidified (spray drying time: less than 60 seconds). The coating thickness was 20 to 30 μm, and 10 groups of self-repairing experimental group test samples P001-P010 and 3 groups of self-repairing control group test samples D001-D003 were prepared.

[0202] 3. Adhesion, friction coefficient, heat resistance and low temperature resistance tests were conducted on the experimental group test samples P001-P010 and the control group test samples D001-D003 respectively. The test methods are as follows:

[0203] Adhesion test: GBT9286-1998 metal coating adhesion test method (100 grid test) is used.

[0204] Friction coefficient test: Adopt the "Test method and evaluation standard for anti-friction performance of coatings" (GB / T13376-2018).

[0205] Heat resistance test: Place each test sample in a high-temperature furnace and heat it to 300℃ and start timing. After 1 minute, turn off the high-temperature furnace and let the test sample cool to room temperature together with it before taking it out for observation.

[0206] Low temperature resistance test: Place the test panel in a high and low temperature test chamber and cool it down to -40℃ together with the test panel. Start timing. After 1 minute, close the high and low temperature test chamber and heat the test panel to room temperature together with the test panel. Then take it out for observation.

[0207] 4. The test results of each test sample are shown in Table 14 below.

[0208] Table 14 Performance test data of each test sample

[0209] Serial number Adhesion (100-grid method) Friction coefficient Heat resistance Low temperature resistance P001 Level 0 0.065 330℃ -41℃ P002 Level 1 0.068 330℃ -41℃ P003 Level 0 0.069 340℃ -45℃ P004 Level 0 0.069 350℃ -45℃ P005 Level 1 0.067 350℃ -41℃ P006 Level 0 0.066 330℃ -41℃ P007 Level 0 0.069 330℃ -46℃ P008 Level 0 0.069 350℃ -46℃ P009 Level 0 0.065 340℃ -46℃ P010 Level 0 0.066 350℃ -46℃ D001 Level 1 0.078 310℃ -28℃ D002 Level 1 0.082 320℃ -31℃ D003 Level 1 0.081 310℃ -36℃

[0210] Comparing the test data in Table 14 above, we can see that the adhesion of both the experimental and control groups reached the standard value of 0-1. However, the friction coefficient of the experimental group reached a maximum of 0.069 and a minimum of 0.065, both within the design standard, while the friction coefficient of the control group was greater than 0.078. In terms of temperature resistance, the experimental group's heat resistance exceeded 330°C, meeting the design target of 300°C; its low-temperature resistance exceeded -41°C, meeting the design target of -40°C. Using this self-lubricating repair spray as a repair agent for worn slides effectively maintains the slide's lubrication and wear resistance, facilitating maintenance of switch equipment.

[0211] While the specific embodiments of the present invention have been described in detail above, these are merely exemplary and the present invention is not limited thereto. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, any equivalent changes and modifications made without departing from the spirit and scope of the present invention are intended to be encompassed within the scope of the present invention.

Claims

1. A railway switch slide self-lubricating repair spray, characterized in that: The composition comprises the following components by weight: 15 to 20 parts of adhesive, 16 to 21 parts of lubricant, 5 to 8 parts of anti-wear agent, 0.22 to 0.4 parts of auxiliary agent and 35 to 45 parts of organic solvent; Wherein, the adhesive is epoxy-modified polyimide resin; the lubricant is selected from one or more of molybdenum disulfide, tungsten disulfide, and polytetrafluoroethylene.

2. The railway switch slide self-lubricating repair spray according to claim 1, characterized in that: The lubricant contains 10 to 12 parts of molybdenum disulfide, 5 to 7 parts of tungsten disulfide and 1 to 2 parts of polytetrafluoroethylene.

3. The railway switch slide self-lubricating repair spray according to claim 1, characterized in that: The wear-resistant agent is made of boron nitride, boron carbide and silicon dioxide. Among them, the boron nitride is 3-4 parts, the boron carbide is 1.5-2.5 parts, and the silicon dioxide is 0.5-1.5 parts.

4. The railway switch slide self-lubricating repair spray according to claim 1, characterized in that: The auxiliary agent is used together with a dispersant, a film-forming agent and an anti-skinning agent; The dispersant is BYK163; the film-forming agent is Dow DALPAD 292; and the anti-skinning agent is Walker VOK-Anti Skin 0445.

5. The railway switch slide self-lubricating repair spray according to claim 4, characterized in that: The BYK163 is 0.1 to 0.2 parts, the Dow DALPAD 292 is 0.06 to 0.1 parts, and the Walker VOK-Anti Skin 0445 is 0.06 to 0.09 parts.

6. The railway switch slide self-lubricating repair spray according to claim 1, characterized in that: The organic solvent is selected from one or both of cyclohexanone and N-methylpyrrolidone.

7. The railway switch slide self-lubricating repair spray according to claim 6, characterized in that: The organic solvent contains 8 to 12 parts of N-methylpyrrolidone and 28 to 32 parts of cyclohexanone.

8. The railway switch slide self-lubricating repair spray according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 15-20 parts of epoxy modified polyimide resin, 10-12 parts of molybdenum disulfide, 5-7 parts of tungsten disulfide, 1-2 parts of polytetrafluoroethylene, 3-4 parts of boron nitride, 1.5-2.5 parts of boron carbide, 0.5-1.5 parts of silicon dioxide, 0.1-0.2 parts of BYK163, 0.06-0.1 parts of Dow DALPAD 292, 0.06-0.09 parts of Walker VOK-Anti Skin 0445, 8-12 parts of N-methylpyrrolidone, 28-32 parts of cyclohexanone, etc.

9. A process for preparing the railway switch slide self-lubricating repair spray according to any one of claims 1 to 8, characterized in that: The steps include: (1) Mix organic solvents N-methylpyrrolidone and cyclohexanone in proportion, and disperse and stir for 5 minutes at a speed of 30 rpm; (2) Add dispersant, film-forming agent and anti-skinning agent in proportion, stir for 5 minutes at 30 rpm; (3) Add epoxy modified polyimide resin as adhesive in proportion and stir for 10 minutes at 60 rpm; (4) Lubricants of molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and wear-resistant agents of boron nitride, boron carbide, and silicon dioxide powder were added in proportion and stirred for 30 minutes at a speed of 90 rpm; (5) The mixed liquid obtained above is added to a grinder and ground three times. The viscosity is detected to be 20±2S (Zai En No. 2 cup), and the fineness is detected to be 15±2 microns. The grinding liquid can be used as a self-lubricating repair spray.

10. The preparation process according to claim 9, characterized in that: The following steps are also included: Take the grinding liquid prepared in the above step (5), add it to the spray can, install the spray valve, and seal it with a pressure cover; fill the spray can with propellant, install the spray nozzle, cover the outer cover, and set aside.

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