Preparation method of low-temperature-resistant, moisture-resistant, solvent-free and anti-corrosion coating for railway station moon platform pillar

Abstract

The invention belongs to the technical field of coatings, and particularly relates to a preparation method of a low-temperature-resistant moisture solvent-free anticorrosive coating for a moon platform pillar of a railway station, which comprises the following steps: in a reaction kettle, adding hydroxyl-terminated epoxy butyronitrile resin into micromolecular epoxy resin, and stirring for 1 hour at the temperature of 45-55 DEG C to obtain composite toughened epoxy resin; putting an acrylic acid dispersing agent into a liquid feeding mechanism, adding the acrylic acid dispersing agent into the composite toughened epoxy resin, stirring for 20-40 minutes, adding an organic silicon defoaming agent, and stirring for 30 minutes; finally, the quick lime and the pigment in the two feeding mechanisms are added into the reaction kettle and stirred for 1.5-2 hours at the temperature of 45-65 DEG C, and a component A is obtained through a screen of the screening mechanism; in a reaction box, bisoxazolidine is added into low-molecular polyether amine and stirred, and finally a component B is obtained through a screen of a screening mechanism; compared with the prior art, two components can be processed and prepared at the same time, the two components can be stored while the preparation efficiency of the coating is improved, and convenient use of the coating is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and more specifically to a method for preparing a low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars. Background Art

[0002] The platform refers to a higher platform next to the track, usually inside the station, to facilitate passengers to get on and off the train, and the pillars play a load-bearing support role. Usually, the outer surface of the pillar is painted with paint or other coatings to achieve the purpose of anti-corrosion and other protection. However, paint and other coatings contain a large amount of volatile toxic substances, and the flow of people on the platform is relatively large, so solvent-free paint is used to coat the surface of the pillar. It does not contain volatile and flammable dangerous solvents, and it is a double-pack paint with a fast reaction rate. The coating film can harden within a few seconds, and the construction is very convenient.

[0003] During the preparation of solvent-free coatings, reactors, mixing barrels and other equipment are usually used to process the coatings. Solvent-free coatings generally include two components of solvents, and the general preparation method is mostly to prepare the two components separately and then use them in a certain proportion, resulting in less than ideal production capacity. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a solvent-free anti-corrosion coating that solves the above-mentioned technical problems.

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for preparing low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars, wherein the preparation and storage of component A and component B are achieved through a coating preparation system, and the coating preparation system includes a first preparation device, a second preparation device, a temperature regulating device, and a storage device.

[0006] Furthermore, the coating comprises component A and component B, wherein component A comprises small molecule epoxy resin, hydroxyl-terminated epoxy nitrile resin, quicklime, acrylic dispersant, silicone defoamer, and pigment, and component B comprises low molecular weight polyether amine and bis(oxazolidine).

[0007] The preparation method of the coating comprises the following steps: Synthesis of component A: a. Add hydroxyl-terminated epoxy nitrile resin to the small molecule epoxy resin and stir at a temperature of 45-55°C for 1 hour to obtain a composite toughened epoxy resin; b. Add the acrylic dispersant to the composite toughened epoxy resin and stir for 20-40 minutes, then add the silicone defoamer and stir for 30 minutes; c. Finally, quicklime and pigment are added, stirred at a temperature of 45-65°C for 1.5-2 hours, and component A is obtained through a sieve; Synthesis of component B: The bis-oxazolidine is added into the low molecular weight polyether amine and stirred to obtain component B.

[0008] Furthermore, the preparation and storage of component A and component B are achieved through a coating preparation system, and the coating preparation system includes a first preparation device, a second preparation device, a temperature adjustment device, and a storage device; The first preparation device comprises a reaction kettle, a first stirring mechanism, a sealing mechanism, a solid feeding mechanism and a liquid feeding mechanism, the first stirring mechanism and the sealing mechanism are both placed in the reaction kettle, and the solid feeding mechanism and the liquid feeding mechanism are both connected to the reaction kettle; The second preparation device comprises a reaction box, a second stirring mechanism and a feeding hopper, wherein the second stirring mechanism is placed in the reaction box, and the feeding hopper is connected to the reaction box; The temperature regulating device comprises a cooling water tank, a heating water tank, a recovery water tank, a first regulating water jacket, and a second regulating water jacket. The cooling water tank and the heating water tank are both connected to the first regulating water jacket and the second regulating water jacket. The recovery water tank is connected to the cooling water tank and the heating water tank. The first regulating water jacket and the second regulating water jacket are both connected to the recovery water tank. The first regulating water jacket and the second regulating water jacket are respectively mounted on the reaction kettle and the reaction box. The material storage device comprises a screening mechanism and a material storage barrel. The screening mechanism is connected with the reaction kettle and the reaction box, and the material storage barrel is matched with the screening mechanism.

[0009] Furthermore, the first regulating water jacket and the second regulating water jacket are both composed of an annular sleeve, a flow equalizer and a partition plate. The annular sleeve includes a regulating chamber and a mixing chamber. The partition plate separates the regulating chamber and the mixing chamber. The flow equalizer is spirally shaped and is placed in the regulating chamber. The flow equalizer and the annular sleeve form a spiral channel, which is connected to the mixing chamber. The mixing chamber is connected to the cooling water pipe and the heating water tank, and the regulating chamber is connected to the heating water tank and the recovery water tank.

[0010] Furthermore, the first stirring mechanism includes a mounting seat, a first motor, a rotating shaft, a fixed seat, and a stirring blade, wherein the first motor is fixed to the mounting seat, the rotating shaft is fixedly connected to the output end of the first motor, and the fixed seat is fixedly connected to the rotating shaft; The stirring blade is composed of a reinforcing plate, a mesh plate and a scraper connected in sequence. The reinforcing plate is detachably connected to the fixing seat. The cross-section of the reinforcing plate is an isosceles trapezoid and a plurality of through holes are opened in the direction of rotation. The cross-section of the scraper is U-shaped, and the end of the scraper contacts the inner wall of the reactor.

[0011] Furthermore, the sealing mechanism includes a cylinder, an inner sealing tube, and an outer sealing ring plate. The cylinder is fixed on a mounting seat, the inner sealing tube is sleeved and fixed on a rotating shaft, the output end of the cylinder is fixedly connected to the outer sealing ring plate, and the outer sealing ring plate corresponds to the inner sealing tube.

[0012] Furthermore, the solid feeding mechanism includes a material box, a grinding assembly, a feeding pipe and a fan. The fan is placed on the top of the material box and is used to supply air into the material box. The feeding pipe is N-shaped and placed at the bottom of the material box. One end of the feeding pipe is connected to the material box, and the other end of the feeding pipe extends into the reactor. The grinding assembly is placed in the material box. The grinding assembly includes a grinding mesh plate, a second motor, a mounting head, a grinding plate and a grinding brush. The second motor is fixed to the middle of the grinding plate, and the output end of the second motor is fixedly connected to the mounting head. The grinding plate and the grinding brush are respectively fixed on both sides of the mounting head, and the grinding plate and the grinding brush are both matched with the grinding mesh plate; the liquid feeding mechanism includes a feeding box and a feeding pipe, and the feeding pipe connects the feeding box and the reactor.

[0013] Furthermore, the screening mechanism includes an adjusting frame, a first screening tube, a second screening tube, a first material introduction tube, and a second material introduction tube. The first screening tube and the second screening tube are both fixed on the adjusting frame. The first material introduction tube and the second material introduction tube are respectively placed at the bottom of the first screening tube and the second screening tube. Several filter screens are provided in the first screening tube and the second screening tube in the height direction, and the filter screens are both in the shape of an inverted bowl.

[0014] Furthermore, the storage barrel is composed of a barrel body, a baffle plate, and a sealing cover. The baffle plate divides the barrel body into two independent storage spaces. The two storage spaces can correspond to the first material introduction tube and the second material introduction tube respectively. The sealing cover is provided with two sealing protrusions, and the two sealing protrusions are used to seal the two storage spaces.

[0015] Furthermore, the second stirring mechanism includes an upper cover, a third motor, and a stirring paddle. The upper cover is movably connected to the reaction box, the third motor is fixed on the upper cover, and the output end of the third motor is fixedly connected to the stirring paddle.

[0016] Furthermore, the coating preparation system also includes a frame, and the first preparation device, the second preparation device and the storage device are all placed on the frame.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The coating of the present invention does not contain harmful substances. When it is applied on the platform pillars, it will not produce volatile toxic substances, which is more environmentally friendly and avoids any impact on the human body; 2. The coating preparation system of the present invention can process and prepare two components at the same time, greatly improving the coating preparation efficiency, and can store the two components at the same time, realizing the convenient use of the coating; 3. The formula design adopted by the coating of the present invention integrates the concept of environmental protection into the core of the product. No harmful gas is emitted during the construction process, which effectively reduces the pollution to the air quality. In addition, it has remarkable quick-drying performance. After the coating is cured, it is hard and wear-resistant and can maintain good physical properties for a long time, thereby ensuring that the surface of the platform column is protected in a lasting and beautiful manner. 4. The coating preparation system of the present invention ensures the accurate ratio of the two components during the mixing process, avoids errors caused by manual operation, and has high stability. The system can also monitor the coating preparation process in real time, promptly discover and adjust the operating status of the production line, and effectively prevent fluctuations in coating quality due to equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the preparation system of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the first stirring mechanism.

[0020] Figure 3 It is a structural schematic diagram of the solid feeding mechanism.

[0021] Figure 4 It is a schematic structural diagram of the second preparation device.

[0022] Figure 5 Schematic diagram of the structure of the regulating water jacket.

[0023] Figure 6 A schematic diagram of the structure of the screening mechanism.

[0024] Figure 7 It is a structural schematic diagram of the storage barrel. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The solvent-free anti-corrosion coating includes component A and component B. Component A is composed of the following components in parts by weight: 60-80 parts of low-molecule epoxy resin, 40-60 parts of hydroxyl-terminated epoxy nitrile resin, 20-40 parts of quicklime, 4-10 parts of acrylic dispersant, 1-2 parts of silicone defoamer, and 10-30 parts of pigment (the pigment is one or more of precipitated barium sulfate, red iron oxide, sericite and talc); component B is composed of the following components in parts by weight: 30-50 parts of bis(oxazolidine) and 50-70 parts of low-molecular polyetheramine.

[0028] Among them, small molecule epoxy resin as the basic resin component provides the basic properties of the coating, such as weather resistance and corrosion resistance; hydroxyl-terminated epoxy nitrile resin can enhance the flexibility and adhesion of the coating, making it better adapt to the surface of the platform column; quicklime as a filler and thickener can improve the hiding power and consistency of the coating, which is beneficial to the construction of the coating; acrylic dispersant can help pigments and fillers to be better dispersed in the resin, improve the uniformity and stability of the coating; silicone defoamer is used to eliminate bubbles generated during the preparation and construction of the coating to ensure the flatness and aesthetics of the coating; pigments are used to adjust the color and hiding power of the coating, and their dosage can be adjusted according to specific color requirements and hiding power; Low molecular weight polyether amines are usually used as curing agents, which can react with epoxy resins in component A to form a cross-linked network, thereby improving the hardness, wear resistance and chemical corrosion resistance of the coating; while bisoxazolidine is a commonly used latent curing agent that can react with epoxy resins under certain conditions to further improve the curing speed and degree of curing of the coating.

[0029] Synthesis of component A: a. In a reaction kettle, add a hydroxyl-terminated epoxy nitrile resin to a small molecule epoxy resin, and stir at a temperature of 45-55°C for 1 hour to obtain a composite toughened epoxy resin; b. Add the acrylic dispersant in a liquid feeding mechanism to the composite toughened epoxy resin and stir for 20-40 minutes, then add the silicone defoamer in another liquid feeding mechanism and stir for 30 minutes; c. Finally, the quicklime and pigment in the two solid feeding mechanisms are added to the reactor, stirred at a temperature of 45-65°C for 1.5-2 hours, and the A component is obtained through the screen of the screening mechanism; Synthesis of component B: In a reaction box, bis-oxazolidine is added to a low molecular weight polyether amine and stirred to obtain component B.

[0030] The coating preparation system includes a frame 1, a first preparation device 2, a second preparation device 3, a temperature regulating device 4, and a storage device 5. The first preparation device 2, the second preparation device 3, the temperature regulating device 4 and the storage device 5 are all placed on the frame 1; when preparing the coating, first prepare two materials, component A and group B, and then put the two components into the first preparation device 2 and the second preparation device 3 respectively for feeding and stirring, and the temperature of the coating solvent in stirring is controlled by the temperature regulating device 4, and finally the two components of the coating are discharged and stored separately.

[0031] The first preparation device 2 includes a reaction kettle 21, a first stirring mechanism 22, a sealing mechanism 23, a solid feeding mechanism 24 and a liquid feeding mechanism 25. The first stirring mechanism 22 and the sealing mechanism 23 are both placed in the reaction kettle 21. The first stirring mechanism 22 is used to stir a variety of solvent materials. The sealing mechanism 23 blocks and seals the stirring solvent to prevent splashing. The solid feeding mechanism 24 and the liquid feeding mechanism 25 are both provided with a plurality of and are used to feed solid materials and liquid materials into the reaction kettle 21 respectively.

[0032] The first stirring mechanism 22 includes a mounting seat 221, a first motor 222, a rotating shaft 223, a fixed seat 224, and a stirring blade 225. The mounting seat 221 is placed on the reactor 21 and is detachable. The mounting seat 221 has a certain sealing effect on the reactor 21; the first motor 222 is fixed on the mounting seat 221, the rotating shaft 223 is fixedly connected to the output end of the first motor 222, and the fixed seat 224 is fixedly connected to the rotating shaft 223; the stirring blade 225 is composed of a reinforcing plate 225a, a mesh plate 225b and a scraper 225c connected in sequence, the reinforcing plate 225a is detachably connected to the fixed seat 224, the cross section of the reinforcing plate 225a is an isosceles trapezoid, and the reinforcing plate 225a is provided with a plurality of through holes in the rotation direction, the cross section of the scraper 225c is U-shaped, and the end of the scraper 225c is in conflict with the inner wall of the reactor 21, and the stirring blade 225 is detachable for cleaning; When the material in the reactor 21 is stirred, the first motor 222 is started and drives the stirring blade 225 to rotate, and the reinforcing plate 225a reinforces and supports the stirring blade 225 as a whole, and the through hole opened thereon can realize the liquid disturbance in the axial middle part of the reactor 21 when it rotates; the mesh plate 225b has a plurality of mesh holes, and when it rotates, it can fully realize the stirring and disturbance of the solution; the U-shaped scraper 225c not only has its strength enhanced, but also its side end can be set to a sharp shape, which can scrape off the solution adhered to the inner wall of the reactor 21, ensuring that a large amount of granular material is not easily adhered to the inner wall of the reactor 21, and at the same time, the scraper 225c also has a good stirring effect; the three-stage stirring blade 225 of the reinforcing plate 225a, the mesh plate 225b and the scraper 225c realize comprehensive stirring and disturbance for the outer, middle and inner parts of the reactor 21, thereby greatly improving the stirring efficiency of the solvent.

[0033] The solid feeding mechanism 24 includes a material box 241, a grinding assembly 242, a feeding pipe 243 and a fan 244. The fan 244 is placed on the top of the material box 241 and is used to supply air to the material box 241. The feeding pipe 243 is N-shaped and placed at the bottom of the material box 241. One end of the feeding pipe 243 is connected to the material box 241, and the other end of the feeding pipe 243 extends into the reactor 21. The grinding assembly 242 is placed in the material box 241. The grinding assembly 242 includes a The grinding mesh plate 242a, the second motor 242b, the mounting head 242c, the grinding plate 242d and the grinding brush 242e are included. The second motor 242b is fixed to the middle part of the grinding mesh plate 242a. The output end of the second motor 242b is fixedly connected to the mounting head 242c. The grinding plate 242d and the grinding brush 242e are respectively fixed to both sides of the mounting head 242c. The grinding plate 242d and the grinding brush 242e are matched with the grinding mesh plate 242a. The solid material is placed on the grinding mesh plate 242a in the material box 241. When the solid feeding mechanism 24 is started, the second motor 242b drives the grinding plate 242d and the grinding brush 242e to rotate on the grinding mesh plate 242a. The bottom of the grinding plate 242d has a grinding protrusion. The grinding mesh plate 242a is composed of criss-crossed steel wires, and has a mesh plate protrusion composed of warp and weft steel wires. The grinding protrusion and the mesh plate protrusion grind the material between them, so that large particles of material can be ground into smaller particles for easy fusion in the solvent. The grinding brush 242e includes bristles, which can disturb the material on the grinding mesh plate 242a, disturb the large particles of material, and brush the small particles of material off the mesh plate and drop them into the feeding pipe 243; the N-shaped feeding pipe 243 has a sedimentation part at the bottom, and fine materials accumulate therein; if solid materials need to be fed into the reactor 21, the fan 244 is started and the fine powdered materials are fed into the reactor 21 by wind; and the solid materials blown by the wind can be more evenly sprinkled into the reactor 21, thereby achieving efficient and sufficient stirring of the materials.

[0034] The liquid feeding mechanism 25 includes a feeding box 251 and a feeding pipe 252 . The feeding pipe 252 connects the feeding box 251 and the reactor 21 . The liquid material is put into the feeding box 251 , and under the action of gravity, the liquid material is fed into the reactor 21 through the feeding pipe 252 .

[0035] The sealing mechanism 23 includes a cylinder 231, an inner sealing tube 232, and an outer sealing ring plate 233. The cylinder 231 is fixed on the mounting seat 221, the inner sealing tube 232 is sleeved and fixed on the rotating shaft, the output end of the cylinder 231 is fixedly connected to the outer sealing ring plate 233, and the outer sealing ring plate 233 is matched with the inner sealing tube 232. The cylinder 231 drives the outer sealing ring plate 233 to move up and down. When the outer sealing ring plate 233 slides on the inner sealing tube 232, the stirring area of ​​the reactor 21 is sealed. When the outer sealing ring plate 233 is separated from the inner sealing tube 232, the stirring area of ​​the reactor 21 is opened. The height of the outer sealing ring plate 233 is adjusted according to the height of the liquid in the reactor 21, so as to avoid the solution from splashing to other positions in the reactor 21 during stirring. When the solution hits the outer sealing ring plate 233 during stirring, the solution hits again under the reaction force of the impact, which can further enhance the stirring effect. After the outer sealing ring plate 233 is moved upward, the nozzles of the feeding pipe and the conveying pipe 252 are placed below it, and the material can be fed at this time.

[0036] The second preparation device 3 includes a reaction box 31, a second stirring mechanism 32 and a feeding hopper 33. The second stirring mechanism 32 is placed in the reaction box 31, and the feeding hopper 33 is connected to the reaction box 31; the second stirring mechanism 32 includes an upper cover 321, a third motor 322, and a stirring paddle 323. The upper cover 321 is movably connected to the reaction box 31, the third motor 322 is fixed on the upper cover 321, and the output end of the third motor 322 is fixedly connected to the stirring paddle 323; The B component materials can be respectively put into the reaction box 31 through a plurality of feeding hoppers 33 , and the second motor drives the stirring paddle 323 to rotate to stir the materials, and the upper cover 321 can seal the reaction box 31 .

[0037] The temperature regulating device 4 includes a cooling water tank 41, a heating water tank 42, a recovery water tank 43, a first regulating water jacket 44, and a second regulating water jacket 45. The heating water tank 42 has a heating pipe. The cooling water tank 41 and the heating water tank 42 are connected to the first regulating water jacket 44 and the second regulating water jacket 45 through pipelines. The recovery water tank 43 is connected to the cooling water tank 41 and the heating water tank 42 through pipelines. The first regulating water jacket 44 and the second regulating water jacket 45 are connected to the recovery water tank 43 through pipelines. The first regulating water jacket 44 and the second regulating water jacket 45 are respectively sleeved on the reactor 21 and the reaction box 31; the first regulating water jacket 44 and the second regulating water jacket 45 are respectively sleeved on the reactor 21 and the reaction box 31; The water jacket 44 and the second regulating water jacket 45 are both composed of an annular sleeve 401, a flow equalizer 402 and a partition plate 403. The annular sleeve 401 includes a regulating chamber 4a and a mixing chamber 4b. The partition plate 403 separates the regulating chamber 4a and the mixing chamber 4b. The flow equalizer 402 is spirally shaped and is placed in the regulating chamber 4a. The flow equalizer 402 and the annular sleeve 401 form a spiral channel, which is connected to the mixing chamber 4b. The mixing chamber 4b is connected to the cooling water pipe and the heating water tank 42. The regulating chamber 4a is connected to the heating water tank 42 and the recovery water tank 43. Valves such as solenoid valves can be set on the pipeline to realize the on and off of water flow. When the reaction kettle 21 and / or the reaction box 31 are heated, the water pump in the heating water tank 42 pumps hot water into the first regulating water jacket 44 and / or the second regulating water jacket 45, and continuously pumps hot water into the first regulating water jacket 44 and / or the second regulating water jacket 45, thereby achieving heating of the reaction kettle 21 and / or the reaction box 31; the heated water flows back to the heating water tank 42 (when the water temperature is high) or the recycling water tank 43 (when the water temperature is low) through the pipeline for recycling; When the reaction kettle 21 and / or the reaction box 31 is cooled, the water pump in the cooling water cabinet 41 pumps cooling water into the first regulating water jacket 44 and / or the second regulating water jacket 45, and the reaction kettle 21 and / or the reaction box 31 are cooled as in the above-mentioned heating process; When cooling the reactor 21 and / or the reaction box 31, the flow rate of the heating water tank 42 pumped into the first regulating water jacket 44 and / or the second regulating water jacket 45 is reduced. At the same time, the cooling water tank 41 pumps water into the first regulating water jacket 44 and / or the second regulating water jacket 45, thereby reducing the water temperature in the first regulating water jacket 44 and / or the second regulating water jacket 45, thereby achieving temperature reduction regulation of the reactor 21 and / or the reaction box 31; The regulating water jacket composed of the annular sleeve 401, the flow equalizing member 402 and the partition plate 403 forms a spiral channel that allows the water to flow through the outer wall of the reactor 21 (reaction box 31), thereby achieving stable and efficient temperature regulation; the setting of the mixing chamber 4b allows the hot water and the cooling water to be mixed in advance, ensuring stable temperature regulation when cooling the reactor 21 (reaction box 31).

[0038] The material storage device 5 includes a screening mechanism 51 and a material storage barrel 52. The screening mechanism 51 is connected to the reactor 21 and the reaction box 31. The material storage barrel 52 corresponds to the screening mechanism 51. The screening mechanism 51 includes an adjustment frame 511, a first screening tube 512, a second screening tube 513, a first material introduction tube 514, and a second material introduction tube 515. The adjustment frame 511 is fixed to the frame 1. The first screening tube 512 and the second screening tube 513 are both fixed to the adjustment frame 511. The first material introduction tube 514 and the second material introduction tube 515 are respectively placed at the bottom of the first screening tube 512 and the second screening tube 513. The first screening tube 512 and the second screening tube 513 have the same structure. The first screening tube 512 and the second screening tube 513 are both in A plurality of filter screens 501 are arranged in the height direction, and the meshes of the plurality of filter screens 501 gradually decrease from top to bottom, and the filter screens 501 are all in the shape of an inverted bowl; the storage barrel 52 is composed of a barrel body 521, a baffle plate 522, and a sealing cover 523, and the baffle plate 522 separates the barrel body 521 into two independent storage spaces, and the two storage spaces can correspond to the first material introduction pipe 514 and the second material introduction pipe 515 respectively, and the sealing cover 523 is provided with two sealing protrusions 524, and the two sealing protrusions 524 are used to seal the two storage spaces; the top and bottom of the first screening pipe 512 and the second screening pipe 513 can be provided with components such as stop valves 516 to realize the opening and closing of the two, and can ensure the cutoff, entry and outflow of the inflowing materials; The solvents stirred and processed by the reaction kettle 21 and the reaction box 31 fall into the first screening tube 512 and the second screening tube 513 respectively, and are filtered through a plurality of filter screens 501 to filter out large particles of materials, and the finer solvents pass through the first feed pipe 514 and the second feed pipe 515 respectively, and fall into the two storage spaces of the storage barrel 52, and finally the two storage spaces are sealed by the sealing cover 523, and the two sealed storage spaces are independent of each other; the inverted filter screen 501 can make the accumulated impurities slide to both sides thereon, so as not to easily affect the subsequent filtration of the solvent liquid; in this way, a good solvent can be obtained, and the two components of the material can be placed in the same storage barrel 52 at the same time, which is convenient for subsequent brushing and use.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars, characterized in that: The coating comprises component A and component B. Component A comprises small molecule epoxy resin, hydroxyl-terminated epoxy nitrile resin, quicklime, acrylic dispersant, silicone defoamer, pigment, Component B includes low molecular weight polyetheramine and bis(oxazolidine), The preparation method of the coating comprises the following steps: Synthesis of component A: a. Add hydroxyl-terminated epoxy nitrile resin to the small molecule epoxy resin and stir at a temperature of 45-55°C for 1 hour to obtain a composite toughened epoxy resin; b. Add the acrylic dispersant to the composite toughened epoxy resin and stir for 20-40 minutes, then add the silicone defoamer and stir for 30 minutes; c. Finally, quicklime and pigment are added, stirred at a temperature of 45-65°C for 1.5-2 hours, and component A is obtained through a sieve; Synthesis of component B: The bis-oxazolidine is added into the low molecular weight polyether amine and stirred to obtain component B.

2. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 1 is characterized in that: The preparation and storage of component A and component B are achieved through a coating preparation system, which includes a first preparation device, a second preparation device, a temperature regulating device, and a storage device. The first preparation device includes a reaction kettle, a first stirring mechanism, a sealing mechanism, a solid feeding mechanism and a liquid feeding mechanism. The first stirring mechanism and the sealing mechanism are both placed in the reaction kettle. The solid feeding mechanism and the liquid feeding mechanism are both connected to the reaction kettle. The second preparation device includes a reaction box, a second stirring mechanism and a feeding hopper, wherein the second stirring mechanism is placed in the reaction box, and the feeding hopper is connected to the reaction box. The temperature regulating device comprises a cooling water tank, a heating water tank, a recovery water tank, a first regulating water jacket, and a second regulating water jacket. The cooling water tank and the heating water tank are both connected to the first regulating water jacket and the second regulating water jacket. The recovery water tank is connected to the cooling water tank and the heating water tank. The first regulating water jacket and the second regulating water jacket are both connected to the recovery water tank. The first regulating water jacket and the second regulating water jacket are respectively mounted on the reaction kettle and the reaction box. The material storage device comprises a screening mechanism and a material storage barrel. The screening mechanism is connected with the reaction kettle and the reaction box, and the material storage barrel is matched with the screening mechanism.

3. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 2, characterized in that: The first regulating water jacket and the second regulating water jacket are both composed of an annular sleeve, a flow equalizer and a partition plate. The annular sleeve includes a regulating chamber and a mixing chamber. The partition plate separates the regulating chamber and the mixing chamber. The flow equalizer is spirally shaped and placed in the regulating chamber. The flow equalizer and the annular sleeve form a spiral channel. The spiral channel is connected to the mixing chamber. The mixing chamber is connected to the cooling water pipe and the heating water tank. The regulating chamber is connected to the heating water tank and the recovery water tank.

4. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 2 or 3, characterized in that: The first stirring mechanism includes a mounting seat, a first motor, a rotating shaft, a fixed seat, and a stirring blade. The first motor is fixed on the mounting seat, the rotating shaft is fixedly connected to the output end of the first motor, and the fixed seat is fixedly connected to the rotating shaft. The stirring blade is composed of a reinforcing plate, a mesh plate and a scraper connected in sequence. The reinforcing plate is detachably connected to the fixing seat. The cross-section of the reinforcing plate is an isosceles trapezoid and the reinforcing plate is provided with a plurality of through holes in the direction of rotation. The cross-section of the scraper is U-shaped, and the end of the scraper contacts the inner wall of the reactor.

5. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 4 is characterized in that: The sealing mechanism includes a cylinder, an inner sealing tube, and an outer sealing ring plate. The cylinder is fixed on a mounting seat, the inner sealing tube is sleeved and fixed on a rotating shaft, the output end of the cylinder is fixedly connected to the outer sealing ring plate, and the outer sealing ring plate corresponds to the inner sealing tube.

6. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 2, characterized in that: The solid feeding mechanism comprises a material box, a grinding assembly, a feeding pipe and a fan, wherein the fan is placed on the top of the material box and is used to supply air into the material box, the feeding pipe is N-shaped and is placed at the bottom of the material box, one end of the feeding pipe is connected to the material box, and the other end of the feeding pipe extends into the reactor, the grinding assembly is placed in the material box, the grinding assembly comprises a grinding mesh plate, a second motor, a mounting head, a grinding plate and a grinding brush, the second motor is fixed to the middle of the grinding plate, the output end of the second motor is fixedly connected to the mounting head, the grinding plate and the grinding brush are respectively fixed to both sides of the mounting head, and the grinding plate and the grinding brush are both matched with the grinding mesh plate; The liquid feeding mechanism comprises a feeding box and a feeding pipe, and the feeding pipe is connected with the feeding box and the reaction kettle.

7. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 2, characterized in that: The screening mechanism includes an adjustment frame, a first screening tube, a second screening tube, a first material introduction tube, and a second material introduction tube. The first screening tube and the second screening tube are both fixed on the adjustment frame. The first material introduction tube and the second material introduction tube are respectively placed at the bottom of the first screening tube and the second screening tube. The first screening tube and the second screening tube are both provided with a plurality of filter screens in the height direction, and the filter screens are both in the shape of an inverted bowl.

8. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 7, characterized in that: The material storage barrel is composed of a barrel body, a baffle plate, and a sealing cover. The baffle plate divides the barrel body into two independent material storage spaces. The two material storage spaces can correspond to the first material introduction tube and the second material introduction tube respectively. The sealing cover is provided with two sealing protrusions, and the two sealing protrusions are used to seal the two material storage spaces.

9. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 2, characterized in that: The second stirring mechanism comprises an upper cover, a third motor and a stirring paddle. The upper cover is movably connected to the reaction box, the third motor is fixed on the upper cover, and the output end of the third motor is fixedly connected to the stirring paddle.

10. The method for preparing the low-temperature and moisture-resistant solvent-free anticorrosive coating for railway station platform pillars according to claim 2, characterized in that: The coating preparation system also includes a frame, and the first preparation device, the second preparation device and the material storage device are all placed on the frame.

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