Mixing device for preparing waterborne polyurethane coating

Abstract

The utility model belongs to the technical field of water-based polyurethane coating mixing equipment, in particular to a mixing device for preparing water-based polyurethane coating, which comprises a mounting frame, a bearing seat fixedly connected in the mounting frame, a fixed shaft rotatably connected in the bearing seat, a mixing barrel fixedly connected at the top of the fixed shaft, and a stirring shaft fixedly connected at the bottom of the mixing barrel. A rotating shaft is rotatably connected to the interior of the mixing barrel, a fixing ring is fixedly connected to the exterior of the rotating shaft, and cross rods are symmetrically and fixedly connected to the exterior of the fixing ring. The motor drives the bevel fluted disc to rotate, the bevel fluted disc drives the two bevel gears to rotate in opposite directions, the bevel gears drive the transmission shaft to rotate, the transmission shaft drives the first synchronizing wheels to rotate, the two first synchronizing wheels drive the corresponding second synchronizing wheels to rotate through belts, and the second synchronizing wheel at the bottom drives the fixed shaft and the mixing barrel to rotate. The second synchronous wheel at the top drives the rotating shaft and the plurality of stirring rollers to rotate in opposite directions with the material mixing barrel, and the material mixing barrel and the stirring rollers rotate in opposite directions, so that a vortex is formed, and the stirring efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waterborne polyurethane coating mixing equipment, in particular to a mixing device for preparing waterborne polyurethane coating. Background Art

[0002] Currently, countries around the world are continuously strengthening the development of environmentally friendly green coatings. Developed countries have a green coating utilization rate of 80%-90%, while my country's rate is less than 50%. Water-based coatings are widely used in various fields. However, water-based polyurethane coatings, which offer superior functionality and environmental performance to conventional water-based coatings, have a relatively small market share due to high R&D costs, thus offering significant room for development.

[0003] The existing technology has the following defects or problems: Current polyurethane water-based coatings may have technical problems such as yellowing, performance degradation, slow drying speed, and poor water resistance as environmental conditions and time change.

[0004] This patent guides the selection of hard monomers, soft monomers, functional monomers, and initiators through molecular structure design, and adopts innovative key synthesis and preparation technologies to improve the coating's drying speed, film hydrophobicity, stability, and other functions while retaining its high hardness, high gloss, high protection, weather resistance, and aging resistance. This results in independently developed high-performance polyurethane water-based coating products.

[0005] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a mixing device for preparing waterborne polyurethane coatings, which solves the existing problems.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mixing device for preparing water-based polyurethane coatings, comprising a mounting frame, the interior of the mounting frame is fixedly connected to a bearing seat, the interior of the bearing seat is rotatably connected to a fixed shaft, the top of the fixed shaft is fixedly connected to a mixing barrel, the interior of the mixing barrel is rotatably connected to a rotating shaft, the exterior of the rotating shaft is fixedly connected to a fixing ring, the exterior of the fixing ring is symmetrically fixedly connected to a cross bar, the bottom of each cross bar is fixedly connected to a side wall scraper, the outer surface of each side wall scraper is in contact with the inner wall of the mixing barrel, and a plurality of stirring rollers are equidistantly fixedly connected to the exterior of the rotating shaft.

[0008] As a preferred technical solution of the present invention, the outside of the mounting frame is fixedly connected to the motor, the inside of the mounting frame is rotatably connected to the bevel gear, and the bevel gear is fixedly connected to the driving end of the motor, the inner wall of the mounting frame is symmetrically fixedly connected to fixed blocks, the interior of each of the fixed blocks is rotatably connected to a transmission shaft, the adjacent ends of the two transmission shafts are fixedly connected to bevel gears, and the two bevel gears are meshed with the bevel gear.

[0009] As a preferred technical solution of the present invention, the other ends of the two transmission shafts pass through the mounting frame and are fixedly connected to the first synchronous wheel, and the other ends of the rotating shaft and the fixed shaft pass through the mounting frame and are fixedly connected to the second synchronous wheel, and each of the second synchronous wheels is connected to the first synchronous wheel belt on the same side.

[0010] As a preferred technical solution of the present invention, a limiting sleeve is fixedly connected to the inner wall of the mounting bracket, and the limiting sleeve is rotatably connected to the rotating shaft.

[0011] As a preferred technical solution of the present invention, a feed port is fixedly connected to the top of the mixing barrel, and an anti-backflow valve is provided inside the feed port.

[0012] As a preferred technical solution of the present invention, a discharge pipe is fixedly connected to the bottom of the mixing barrel, and a discharge valve is provided inside the discharge pipe.

[0013] As a preferred technical solution of the present invention, the bottom of the mounting frame is symmetrically fixedly connected with supporting legs, and the bottom ends of the plurality of supporting legs are fixedly connected with a bottom plate.

[0014] Compared with the prior art, the present invention provides a mixing device for preparing waterborne polyurethane coatings, which has the following beneficial effects:

[0015] 1. A mixing device for preparing a waterborne polyurethane coating is provided with a motor, a bevel gear, a bevel gear, a transmission shaft, a first synchronous wheel, a second synchronous wheel, a rotating shaft, a fixed shaft and a mixing drum. The motor drives the bevel gear to rotate, the bevel gear drives the two bevel gears to rotate in opposite directions, the bevel gear drives the transmission shaft to rotate, the transmission shaft drives the first synchronous wheel to rotate, the two first synchronous wheels drive the corresponding second synchronous wheels to rotate through belts, the second synchronous wheel at the bottom drives the fixed shaft to rotate inside the bearing seat, the fixed shaft drives the mixing drum to rotate, the second synchronous wheel at the top drives the rotating shaft to rotate, the rotating shaft drives multiple stirring rollers to rotate in opposite directions to the mixing drum, the mixing drum and the stirring rollers rotate in opposite directions to each other, thereby forming a vortex and improving stirring efficiency;

[0016] 2. This mixing device for preparing waterborne polyurethane coatings is provided with a fixed ring, a cross bar and a side wall scraper. The fixed ring and the cross bar are driven to rotate by a rotating shaft, and the cross bar drives the side wall scraper to rotate. The side wall scraper scrapes the inner wall of the mixing barrel to prevent adhesion. The gear ratio of the bevel gear and the bevel gear is 1, that is, the bevel gear rotates one circle, and the bevel gear rotates the rotating shaft circle, so that the stirring roller and the mixing barrel rotate at high speed, thereby dispersing the mixture inside the mixing barrel at high speed. After high-speed dispersion, the obtained waterborne coating product has a double-layer structure, which can greatly improve the storage stability of the waterborne polyurethane coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the mixing cylinder of the utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure of the mixing barrel of the utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure of the mounting bracket of the utility model.

[0021] In the figure: 1. Mounting frame; 2. Bearing seat; 3. Fixed shaft; 4. Mixing barrel; 5. Rotating shaft; 6. Fixed ring; 7. Cross bar; 8. Side scraper; 9. Stirring roller; 10. Motor; 11. Bevel gear; 12. Fixed block; 13. Drive shaft; 14. Bevel gear; 15. First synchronous wheel; 16. Second synchronous wheel; 17. Limit sleeve; 18. Feed inlet; 19. Anti-backflow valve; 20. Discharge pipe; 21. Discharge valve; 22. Support leg; 23. Bottom plate. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figures 1-4As shown, the utility model provides a technical solution: a mixing device for preparing water-based polyurethane coatings, comprising a mounting frame 1, the interior of the mounting frame 1 is fixedly connected to a bearing seat 2, the interior of the bearing seat 2 is rotatably connected to a fixed shaft 3, the top of the fixed shaft 3 is fixedly connected to a mixing barrel 4, the interior of the mixing barrel 4 is rotatably connected to a rotating shaft 5, the exterior of the rotating shaft 5 is fixedly connected to a fixing ring 6, the exterior of the fixing ring 6 is symmetrically fixedly connected to a cross bar 7, the bottom of each cross bar 7 is fixedly connected to a side wall scraper 8, the outer surface of each side wall scraper 8 is in contact with the inner wall of the mixing barrel 4, a plurality of stirring rollers 9 are equidistantly fixedly connected to the exterior of the rotating shaft 5, the exterior of the mounting frame 1 is fixedly connected to a motor 10, the interior of the mounting frame 1 is rotatably connected to A bevel gear disc 11 is fixedly connected to the driving end of the motor 10. A fixed block 12 is symmetrically fixedly connected to the inner wall of the mounting frame 1. A transmission shaft 13 is rotatably connected to the interior of each fixed block 12. The adjacent ends of the two transmission shafts 13 are fixedly connected to a bevel gear 14. The two bevel gears 14 are meshed with the bevel gear disc 11. The other ends of the two transmission shafts 13 pass through the mounting frame 1 and are fixedly connected to the first synchronous wheel 15. The other ends of the rotating shaft 5 and the fixed shaft 3 pass through the mounting frame 1 and are fixedly connected to the second synchronous wheel 16. Each second synchronous wheel 16 is belt-connected to the first synchronous wheel 15 on the same side. A limiting sleeve 17 is fixedly connected to the inner wall of the mounting frame 1, and the limiting sleeve 17 is rotatably connected to the rotating shaft 5.

[0026] In this embodiment, the bevel gear disc 11 is driven to rotate by the motor 10. When the bevel gear disc 11 rotates, it drives the two bevel gears 14 to rotate in opposite directions. When the bevel gear 14 rotates, it drives the transmission shaft 13 to rotate inside the fixed block 12. The fixed block 12 can limit the transmission shaft 13 and improve the rotation stability of the transmission shaft 13. When the transmission shaft 13 rotates, it drives the first synchronous wheel 15 to rotate. When the two first synchronous wheels 15 rotate, the corresponding second synchronous wheels 16 are driven to rotate through the belt. The second synchronous wheel 16 at the bottom drives the fixed shaft 3 to rotate inside the bearing seat 2. The bearing seat 2 can improve the rotation smoothness of the fixed shaft 3 and reduce wear. When the fixed shaft 3 rotates, it drives the mixing barrel 4 to rotate, and the second synchronous wheel 16 at the top drives the rotating shaft 5 to rotate. When the rotating shaft 5 rotates, it drives multiple stirring rollers 9 to rotate in the opposite direction to the mixing drum 4. The mixing drum 4 and the stirring rollers 9 rotate in the opposite direction to each other, thereby forming a vortex to improve the stirring efficiency. At the same time, when the rotating shaft 5 rotates, it drives the fixing ring 6 and the cross bar 7 to rotate. When the cross bar 7 rotates, it drives the side wall scraper 8 to rotate. The side wall scraper 8 scrapes the inner wall of the mixing drum 4 to prevent adhesion; the gear ratio of the bevel gear 11 to the bevel gear 14 is 1 to 5, that is, the bevel gear 11 rotates one circle, and the bevel gear 14 rotates the rotating shaft 5 circles, so that the stirring rollers 9 and the mixing drum 4 rotate at high speed, thereby dispersing the mixture inside the mixing drum 4 at high speed. After high-speed dispersion, the obtained water-based paint product has a double-layer structure, which can greatly improve the storage stability of the water-based polyurethane paint.

[0027] Example 2

[0028] like Figures 1-4 As shown, the top of the mixing barrel 4 is fixedly connected to a feed port 18, an anti-backflow valve 19 is provided inside the feed port 18, the bottom of the mixing barrel 4 is fixedly connected to a discharge pipe 20, a discharge valve 21 is provided inside the discharge pipe 20, and the bottom of the mounting frame 1 is symmetrically fixedly connected to support legs 22, and the bottom ends of multiple support legs 22 are fixedly connected to a bottom plate 23.

[0029] In this embodiment, hydroxyl acrylate dispersion is injected into the interior of the mixing barrel 4 through the feed port 18 to prepare water-based paint, the anti-backflow valve 19 is closed to prevent backflow during mixing, and the discharge valve 21 is opened to discharge the water-based polyurethane paint from the discharge pipe 20. The four legs 22 and the bottom plate 23 are used together to increase the contact area with the ground, thereby improving the stability of the equipment.

[0030] The working principle of this embodiment is as follows: when in use, first: close the discharge valve 21, and inject the hydroxyl acrylate dispersion into the interior of the mixing barrel 4 through the feed port 18 to prepare a water-based coating. Through a multi-step synthesis method, raw materials containing functional groups such as hydroxyl groups are introduced to synthesize a solvent-free acrylate, which has the characteristics of low viscosity, low VOC and high solid content. The two-component hydroxyl-containing acrylic dispersion makes the product's dispersibility and stability even better. This hydroxyl acrylate dispersion is used to prepare a water-based coating, and then amine is added for neutralization to make the product have better water solubility.

[0031] Second: close the anti-backflow valve 19 to prevent backflow during mixing, and drive the bevel gear 11 to rotate through the motor 10. When the bevel gear 11 rotates, it drives the two bevel gears 14 to rotate in opposite directions. When the bevel gear 14 rotates, it drives the transmission shaft 13 to rotate inside the fixed block 12. The fixed block 12 can limit the transmission shaft 13 and improve the rotation stability of the transmission shaft 13. When the transmission shaft 13 rotates, it drives the first synchronous wheel 15 to rotate. When the two first synchronous wheels 15 rotate, the corresponding second synchronous wheels 16 are driven to rotate through the belt. The second synchronous wheel 16 at the bottom drives the fixed shaft 3 to rotate inside the bearing seat 2. The bearing seat 2 can improve the rotation smoothness of the fixed shaft 3 and reduce wear. When the fixed shaft 3 rotates, it drives the mixing barrel 4 to rotate;

[0032] Third: The second synchronous wheel 16 at the top drives the rotating shaft 5 to rotate. When the rotating shaft 5 rotates, it drives multiple stirring rollers 9 and the mixing barrel 4 to rotate in the opposite direction. The mixing barrel 4 and the stirring rollers 9 rotate in opposite directions to each other, thereby forming a vortex to improve the stirring efficiency. At the same time, when the rotating shaft 5 rotates, it drives the fixing ring 6 and the cross bar 7 to rotate. When the cross bar 7 rotates, it drives the side wall scraper 8 to rotate. The side wall scraper 8 scrapes the inner wall of the mixing barrel 4 to prevent adhesion; the gear ratio of the bevel gear 11 and the bevel gear 14 is 1 to 5, that is, the bevel gear 11 rotates one circle, and the bevel gear 14 rotates the rotating shaft 5 circles, so that the stirring rollers 9 and the mixing barrel 4 rotate at high speed, thereby dispersing the mixture inside the mixing barrel 4 at high speed. After high-speed dispersion, the obtained water-based paint product has a double-layer structure, which can greatly improve the storage stability of the water-based polyurethane paint. At this time, open the discharge valve 21 to discharge the water-based polyurethane paint from the discharge pipe 20.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A mixing device for preparing waterborne polyurethane coatings, characterized in that: The invention comprises a mounting frame (1), wherein the interior of the mounting frame (1) is fixedly connected to a bearing seat (2), the interior of the bearing seat (2) is rotatably connected to a fixed shaft (3), the top of the fixed shaft (3) is fixedly connected to a mixing barrel (4), the interior of the mixing barrel (4) is rotatably connected to a rotating shaft (5), the exterior of the rotating shaft (5) is fixedly connected to a fixing ring (6), the exterior of the fixing ring (6) is symmetrically fixedly connected to a cross bar (7), the bottom of each cross bar (7) is fixedly connected to a side wall scraper (8), the outer surface of each side wall scraper (8) is in contact with the inner wall of the mixing barrel (4), and the exterior of the rotating shaft (5) is equidistantly fixedly connected to a plurality of stirring rollers (9).

2. A mixing device for preparing a waterborne polyurethane coating according to claim 1, characterized in that: The outside of the mounting frame (1) is fixedly connected to a motor (10), the inside of the mounting frame (1) is rotatably connected to a bevel gear disk (11), and the bevel gear disk (11) is fixedly connected to the driving end of the motor (10), the inner wall of the mounting frame (1) is symmetrically fixedly connected to fixed blocks (12), the inside of each fixed block (12) is rotatably connected to a transmission shaft (13), adjacent ends of two transmission shafts (13) are fixedly connected to bevel gears (14), and the two bevel gears (14) are meshed with the bevel gear disk (11).

3. A mixing device for preparing a waterborne polyurethane coating according to claim 2, characterized in that: The other ends of the two transmission shafts (13) pass through the mounting frame (1) and are fixedly connected to the first synchronous wheel (15); the other ends of the rotating shaft (5) and the fixed shaft (3) pass through the mounting frame (1) and are fixedly connected to the second synchronous wheel (16); each of the second synchronous wheels (16) is connected to the first synchronous wheel (15) on the same side by a belt.

4. A mixing device for preparing a waterborne polyurethane coating according to claim 1, characterized in that: A limiting sleeve (17) is fixedly connected to the inner wall of the mounting frame (1), and the limiting sleeve (17) is rotatably connected to the rotating shaft (5).

5. The mixing device for preparing a waterborne polyurethane coating according to claim 1, characterized in that: A feed port (18) is fixedly connected to the top of the mixing cylinder (4), and an anti-backflow valve (19) is provided inside the feed port (18).

6. A mixing device for preparing a waterborne polyurethane coating according to claim 1, characterized in that: A discharge pipe (20) is fixedly connected to the bottom of the mixing cylinder (4), and a discharge valve (21) is provided inside the discharge pipe (20).

7. A mixing device for preparing a waterborne polyurethane coating according to claim 1, characterized in that: The bottom of the mounting frame (1) is symmetrically fixedly connected to supporting legs (22), and the bottom ends of the plurality of supporting legs (22) are fixedly connected to a bottom plate (23).

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