A method for preparing a self-cleaning environmentally friendly coating material

Abstract

The present invention discloses a method for preparing a self-cleaning environmentally friendly coating material, which relates to the technical field of coating material preparation, and includes: a stirring barrel; a titanium dioxide suspension liquid supply mechanism, wherein the titanium dioxide suspension liquid supply mechanism is installed on the outside of the stirring barrel, and the output end is connected to the bottom of the stirring barrel; a stirring mechanism, wherein the stirring mechanism includes a motor, and the motor is installed on the top of the stirring barrel. The present invention sets a stirring mechanism, and the output end of the motor drives the hollow rotating rod to rotate when the motor is working. The rotation of the hollow rotating rod directly drives the second blade to rotate, and the first blade is driven to rotate through the transmission assembly. The first blade and the second blade rotate in the same direction at different speeds. Compared with the rotation of a single blade, a complex fluid flow pattern can be formed when the two blades rotate in the same direction at different speeds, and compared with the reverse rotation, the flow pattern is more orderly, which helps to reduce the friction and collision between materials.

Description

Technical Field

[0001] The present invention relates to the technical field of coating material preparation, and in particular to a method for preparing a self-cleaning environmentally friendly coating material. Background Art

[0002] Coating materials are used to coat the surface of objects to provide protection for them. In the preparation process of existing coating materials, nano-titanium dioxide is usually used as a material to prepare nano-titanium dioxide coatings. Nano-titanium dioxide coatings are an environmentally friendly coating material with self-cleaning properties. Nano-titanium dioxide has strong redox ability under the action of visible light or ultraviolet light, stable chemical properties, bactericidal effects, and has the characteristics of removing pollutants, hydrophilicity, self-cleaning, etc. It has long-lasting performance and does not produce secondary pollution.

[0003] When preparing nano titanium dioxide coatings, a stirring mechanism is often used to drive blades to rotate to stir and mix nano titanium dioxide powder and dispersant. In this method, nano titanium dioxide powder is prone to agglomeration, which reduces the mixing effect of nano titanium dioxide powder and dispersant. The use of a single blade rotation cannot form a complex fluid flow pattern, which is not conducive to improving the mixing effect. The use of two blades rotating in opposite directions is likely to increase friction and collision between materials. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that nano titanium dioxide powder is easily agglomerated in the manner in which a stirring mechanism drives blades to rotate to stir and mix nano titanium dioxide powder and a dispersant, thereby reducing the mixing effect of the nano titanium dioxide powder and the dispersant, and to propose a method for preparing a self-cleaning and environmentally friendly coating material.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a method for preparing a self-cleaning environmentally friendly coating material, which relates to a device for preparing a self-cleaning environmentally friendly coating material, comprising:

[0006] Mixing tank;

[0007] A titanium dioxide suspension liquid supply mechanism, wherein the titanium dioxide suspension liquid supply mechanism is installed outside the stirring barrel, and an output end thereof is connected to the bottom of the stirring barrel;

[0008] A stirring mechanism, wherein the stirring mechanism comprises a motor, wherein the motor is mounted on the top of the stirring barrel, wherein the output end of the motor penetrates the top wall of the stirring barrel and is coaxially fixedly connected with a hollow rotating rod, wherein three sets of fan blades are connected to the hollow rotating rod, wherein the fan blades comprise a transmission assembly, a first fan blade and a second fan blade, wherein the input end of the transmission assembly is connected to the hollow rotating rod, and the output end is connected to the first fan blade, wherein the second fan blade is connected to the hollow rotating rod, and wherein a window for the second fan blade to rotate is provided on the inner side of the first fan blade;

[0009] A nitrogen charging mechanism, wherein the nitrogen charging mechanism is connected to the stirring barrel, an output end of the nitrogen charging mechanism is connected to the inside of the stirring barrel, and a top of the stirring barrel is connected to an exhaust port;

[0010] The following steps are also included:

[0011] S1: The titanium dioxide suspension liquid supply mechanism works to deliver the titanium dioxide suspension into the bottom of the mixing barrel;

[0012] S2: Start the motor, the motor output end drives the hollow rotating rod to rotate, the hollow rotating rod rotates to drive the three sets of fan blades to rotate to stir the solution in the mixing barrel, the three fan blades are composed of a transmission assembly, a first fan blade and a second fan blade, the hollow rotating rod rotates to drive the first fan blade to rotate through the transmission assembly, and directly drives the second fan blade to rotate, so that the first fan blade and the second fan blade rotate in the same direction and at different speeds, forming a complex and orderly fluid, which helps to reduce friction and collision between materials;

[0013] S3: When the second blade rotates, it pushes the nearby water flow upward, and when the first blade rotates, it pushes the nearby water flow downward, thereby improving the solution mixing effect;

[0014] S4: When the motor is working, the nitrogen charging mechanism delivers nitrogen into the mixing barrel, reducing the oxygen content in the mixing barrel, reducing the agglomeration of titanium dioxide, and allowing the nitrogen to blend more smoothly into the water flow;

[0015] Preferably, a bracket is fixedly connected to the bottom of the stirring barrel, and a through hole is provided on the bracket for the output end of the titanium dioxide suspension supply mechanism to pass through.

[0016] Preferably, the titanium dioxide suspension supply mechanism includes a high-speed stirrer, which is installed on the outside of the stirring barrel and is connected to a filling port on the top. A water pump is installed at the bottom of the high-speed stirrer, and the input end of the water pump is connected to the output end of the high-speed stirrer. The output end of the water pump is connected to a delivery pipe, and the delivery pipe passes through a through opening at one end away from the water pump and is sealed through the bottom of the stirring barrel, and is connected to a discharge port, and a plurality of through holes connecting the delivery pipe and the inside of the stirring barrel are opened on the side of the discharge port.

[0017] Preferably, the transmission assembly includes two rotating rings, both of which are coaxially rotatably connected to a hollow rotating rod, the same first fan blade is coaxially fixedly connected to the outer sides of the two rotating rings, an internal gear is coaxially fixedly connected to one of the rotating rings, a fixed rod is fixedly connected to the inner wall of the mixing barrel, and the first gear is rotatably connected to one end of the fixed rod away from the inner wall of the mixing barrel, one side of the first gear is meshed with the internal gear, and the other side is meshed with a second gear, and the second gear is coaxially fixedly connected to the hollow rotating rod.

[0018] Preferably, the output axis of the second blade is axially upward along the axial direction of the hollow rotating rod, and the output axis of the first blade is axially downward along the axial direction of the hollow rotating rod.

[0019] Preferably, the edge of the first blade is serrated.

[0020] Preferably, a scraper is fixedly connected to the outer side of the second blade, the scraper is elastic, and the side of the scraper away from the second blade is squeezed and contacted with the edge of the window of the first blade when the second blade rotates.

[0021] Preferably, the three groups of fan blade groups are the first fan blade group, the second fan blade group and the third fan blade group, the first fan blade group is close to the liquid surface, the blade inclination angles of the first fan blade and the second fan blade in the first fan blade group are smaller than the blade inclination angles of the first fan blade and the second fan blade in the second fan blade group and the third fan blade group, the diameter of the first gear in the first fan blade group is larger than the diameter of the first gear in the second fan blade group and the third fan blade group; the spacing between the first fan blade group and the second fan blade group is larger than the spacing between the second fan blade group and the third fan blade group.

[0022] Preferably, a scraping assembly is connected to the bottom end of the hollow rotating rod, and the scraping assembly includes a scraper. The bottom of the mixing barrel is funnel-shaped, and the bottom of the scraper is gap-matched with the bottom of the mixing barrel.

[0023] Preferably, the nitrogen charging mechanism comprises a nitrogen generating device, the output end of the nitrogen generating device is connected with an air supply pipe and three hollow fixed rods, the ends of the three hollow fixed rods away from the nitrogen generating device are all sealed and penetrate the stirring barrel, and are all connected with an annular cavity, the annular cavity is opened in another rotating ring, a plurality of first air grooves are opened in the first blade, a first air hole connecting the annular cavity and the first air groove is opened in another rotating ring, and the ends of the plurality of first air grooves away from the rotating ring are connected with first jet holes, the end of the air supply pipe away from the nitrogen generating device is sealed and penetrates the stirring barrel, and is connected with a sleeve, the sleeve is sealed and rotatably connected to the hollow rotating rod, the hollow rotating rod is provided with a plurality of air inlet holes connecting the inside of the sleeve and the hollow rotating rod, a second air groove is opened in the second blade, a second air hole connecting the second air groove and the inside of the hollow rotating rod is opened on the hollow rotating rod, the end of the second air groove away from the second air hole is connected with a second jet hole, the first jet hole and the second jet hole are both connected with the inside of the stirring barrel, and the jet directions of the two jet holes are consistent with the flow direction of nearby water flow.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] 1. The present invention provides a titanium dioxide suspension liquid supply mechanism, and a high-speed stirrer stirs the introduced nano titanium dioxide powder and dispersant at a high speed, so that the nano titanium dioxide powder is preliminarily dispersed in the medium to obtain a nano titanium dioxide suspension. For the nano titanium dioxide powder that is easy to agglomerate, forming a suspension first helps to break its agglomeration state, and then further refines and disperses it through stirring, thereby improving the uniformity of the environmentally friendly coating mixture.

[0026] 2. The present invention sets a stirring mechanism. When the motor works, its output end drives the hollow rotating rod to rotate. The rotation of the hollow rotating rod directly drives the second blade to rotate. The first blade is driven to rotate through the transmission component. The first blade and the second blade rotate in the same direction but at different speeds. Compared with the rotation of a single blade, a complex fluid flow pattern can be formed when the two blades rotate in the same direction but at different speeds. Compared with the reverse rotation, the flow pattern is more orderly, which helps to reduce friction and collision between materials.

[0027] 3. The present invention provides a scraper, and when the second blade rotates, the scraper continuously scrapes the first blade, so that the first blade and the second blade vibrate during rotation, thereby preventing titanium dioxide powder from being adsorbed on the blade during stirring, thereby improving the mixing effect.

[0028] 4. The present invention provides a first fan blade with a serrated edge. When the first fan blade rotates, the serrations can more effectively generate local high pressure and velocity gradients in the fluid, thereby enhancing the friction and shearing effect between the fluid and the blade edge, helping to break up the agglomeration of titanium dioxide powder, promoting uniform mixing of the coating, and reducing the size of bubbles, increasing the contact area between bubbles and liquid, which is conducive to faster escape of gas in the bubbles.

[0029] 5. The present invention adjusts the inclination angle of the blades in the three groups of fan blades and the size of the first gear so that the rotation speed of the first fan blade group is slower to reduce the disturbance to the liquid surface, while the second and third fan blade assemblies are away from the first fan blade group and close to the bottom of the mixing barrel, which helps to quickly break up the introduced titanium dioxide suspension, reduce the accumulation and stratification of materials at the bottom, and improve the mixing uniformity.

[0030] 6. The present invention provides a nitrogen charging mechanism to fill the mixing barrel with nitrogen, thereby reducing the oxygen content in the mixing barrel and reducing the charge imbalance caused by oxidation on the surface of titanium dioxide powder particles, thereby reducing electrostatic attraction, reducing the agglomeration of titanium dioxide, and improving the mixing effect of the mixture.

[0031] 7. The present invention provides a first jet hole and a second jet hole whose nitrogen introduction direction is the same as the direction of the nearby water flow, so that the nitrogen can be more smoothly integrated into the water flow, reducing the relative movement between the gas and the water flow, reducing the formation and aggregation of bubbles in the liquid, and allowing more gas to be dissolved in the liquid. The jetted airflow can also be combined with the flow direction of the water flow to increase the turbulence and mixing effect during the stirring process, so that the mixing of the various components of the coating is more uniform and rapid. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a method for preparing a self-cleaning environmentally friendly coating material proposed by the present invention;

[0033] Figure 2 A side view of a method for preparing a self-cleaning environmentally friendly coating material proposed by the present invention;

[0034] Figure 3 This is a side view of the interior of a mixing barrel of a method for preparing a self-cleaning environmentally friendly coating material proposed by the present invention;

[0035] Figure 4 A schematic diagram of the structure of a stirring mechanism of a method for preparing a self-cleaning and environmentally friendly coating material proposed by the present invention;

[0036] Figure 5 A schematic diagram of the structure of the fan blade part of a method for preparing a self-cleaning environmentally friendly coating material proposed by the present invention;

[0037] Figure 6 A top view of a transmission component of a method for preparing a self-cleaning environmentally friendly coating material proposed by the present invention;

[0038] Figure 7 for Figure 5 A detailed enlarged picture of point A;

[0039] Figure 8 for Figure 5 A magnified view of the detail at B;

[0040] In the figure: 1 mixing barrel, 2 injection port, 3 high-speed mixer, 4 water pump, 5 delivery pipe, 6 bracket, 7 nitrogen generator, 8 exhaust port, 9 motor, 10 sleeve, 11 air pipe, 12 discharge port, 13 scraper, 14 fixed rod, 15 hollow rotating rod, 16 hollow fixed rod, 17 first fan blade group, 18 second fan blade group, 19 third fan blade group, 20 air inlet, 21 first fan blade, 22 scraper, 23 second fan blade, 24 rotating ring, 25 internal gear, 26 first gear, 27 second gear, 28 first jet hole, 29 second jet hole. DETAILED DESCRIPTION

[0041] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0042] Reference Figure 1-Figure 8 A method for preparing a self-cleaning environmentally friendly coating material, which relates to a device for preparing a self-cleaning environmentally friendly coating material, comprising:

[0043] Reference Figure 1-Figure 3 , a mixing barrel 1; a discharging pipe is connected to the bottom of the mixing barrel 1, and a valve is installed on the discharging pipe for discharging operation.

[0044] The titanium dioxide suspension liquid supply mechanism is installed outside the stirring barrel 1 , and the output end is communicated with the bottom of the stirring barrel 1 .

[0045] A bracket 6 is fixedly connected to the bottom of the stirring barrel 1 , and a through hole is provided on the bracket 6 for the output end of the titanium dioxide suspension supply mechanism to pass through.

[0046] Reference Figure 3-Figure 5 , stirring mechanism, the stirring mechanism includes a motor 9, the motor 9 is installed on the top of the stirring barrel 1, the output end of the motor 9 passes through the top wall of the stirring barrel 1, and is coaxially fixedly connected with a hollow rotating rod 15, and three groups of fan blades are connected to the hollow rotating rod 15, the fan blade group includes a transmission assembly, a first fan blade 21 and a second fan blade 23, the input end of the transmission assembly is connected to the hollow rotating rod 15, and the output end is connected to the first fan blade 21, the second fan blade 23 is connected to the hollow rotating rod 15, and a window for the second fan blade 23 to rotate is opened on the inner side of the first fan blade 21.

[0047] Reference Figure 1 , Figure 3 , Figure 7 and Figure 8 , a nitrogen charging mechanism, the nitrogen charging mechanism is connected to the stirring barrel 1, the output end of the nitrogen charging mechanism is connected to the inside of the stirring barrel 1, and the top of the stirring barrel 1 is connected to an exhaust port 8.

[0048] The following steps are also included:

[0049] S1: The titanium dioxide suspension liquid supply mechanism works to feed the titanium dioxide suspension into the bottom of the stirring barrel 1;

[0050] S2: Start the motor 9, the output end of the motor 9 drives the hollow rotating rod 15 to rotate, the hollow rotating rod 15 rotates to drive the three sets of fan blades to rotate to stir the solution in the stirring barrel 1, the three fan blades are composed of a transmission assembly, a first fan blade 21 and a second fan blade 23, the hollow rotating rod 15 rotates to drive the first fan blade 21 to rotate through the transmission assembly, and directly drives the second fan blade 23 to rotate, so that the first fan blade 21 and the second fan blade 23 rotate in the same direction at different speeds, forming a complex and orderly fluid, which helps to reduce friction and collision between materials;

[0051] S3: When the second blade 23 rotates, it pushes the nearby water flow upward, and when the first blade 21 rotates, it pushes the nearby water flow downward, thereby improving the solution mixing effect;

[0052] S4: When the motor 9 is working, the nitrogen charging mechanism delivers nitrogen into the mixing barrel 1, reducing the oxygen content in the mixing barrel 1, reducing the agglomeration of titanium dioxide, and allowing the nitrogen to blend more smoothly into the water flow.

[0053] Reference Figure 1-Figure 3 The titanium dioxide suspension supply mechanism includes a high-speed stirrer 3, which is installed on the outside of the stirring barrel 1 and is connected to a filling port 2 at the top. A water pump 4 is installed at the bottom of the high-speed stirrer 3. The input end of the water pump 4 is connected to the output end of the high-speed stirrer 3. The output end of the water pump 4 is connected to a delivery pipe 5. The delivery pipe 5 passes through a through opening at one end away from the water pump 4 and is sealed through the bottom of the stirring barrel 1, and is connected to a discharge port 12. A plurality of through holes connecting the delivery pipe 5 and the inside of the stirring barrel 1 are opened on the side of the discharge port 12.

[0054] Reference Figure 6 The transmission assembly includes two rotating rings 24, which are coaxially rotatably connected to the hollow rotating rod 15. The same first fan blade 21 is coaxially fixedly connected to the outer sides of the two rotating rings 24. An internal gear 25 is coaxially fixedly connected to one rotating ring 24. A fixed rod 14 is fixedly connected to the inner wall of the mixing barrel 1. The fixed rod 14 is rotatably connected to the first gear 26 at one end away from the inner wall of the mixing barrel 1. One side of the first gear 26 is meshed with the internal gear 25, and the other side is meshed with a second gear 27. The second gear 27 is coaxially fixedly connected to the hollow rotating rod 15.

[0055] Reference Figure 3-Figure 5 The output axial direction of the second fan blade 23 is axially upward along the hollow rotating rod 15, and the output axial direction of the first fan blade 21 is axially downward along the hollow rotating rod 15.

[0056] The edge of the first blade 21 is serrated.

[0057] A scraper 22 is fixedly connected to the outer side of the second blade 23 . The scraper 22 is elastic. The side of the scraper 22 away from the second blade 23 is pressed and contacted with the edge of the window of the first blade 21 when the second blade 23 rotates.

[0058] The three fan blade groups are the first fan blade group 17, the second fan blade group 18 and the third fan blade group 19. The first fan blade group 17 is close to the liquid surface. The blade inclination angles of the first fan blade 21 and the second fan blade 23 in the first fan blade group 17 are smaller than the blade inclination angles of the first fan blade 21 and the second fan blade 23 in the second fan blade group 18 and the third fan blade group 19. The diameter of the first gear 26 in the first fan blade group 17 is larger than the diameter of the first gear 26 in the second fan blade group 18 and the third fan blade group 19; the spacing between the first fan blade group 17 and the second fan blade group 18 is larger than the spacing between the second fan blade group 18 and the third fan blade group 19.

[0059] Reference Figure 3 The bottom end of the hollow rotating rod 15 is connected to a scraping assembly, which includes a scraper 13. The bottom of the mixing barrel 1 is funnel-shaped, and the bottom of the scraper 13 is in a gap with the bottom of the mixing barrel 1.

[0060] Reference Figure 1 , Figure 3 , Figure 7 and Figure 8 The nitrogen charging mechanism includes a nitrogen generating device 7, the output end of the nitrogen generating device 7 is connected to an air delivery pipe 11 and three hollow fixed rods 16, the ends of the three hollow fixed rods 16 away from the nitrogen generating device 7 are all sealed and penetrate the mixing barrel 1, and are all connected to an annular cavity, the annular cavity is opened in another rotating ring 24, a plurality of first air grooves are opened in the first fan blade 21, a first air hole connecting the annular cavity and the first air groove is opened in another rotating ring 24, the first air grooves are connected to the first injection hole 28 at one end away from the rotating ring 24, and the air delivery pipe 11 is sealed and penetrated at one end away from the nitrogen generating device 7. A mixing barrel 1 is provided, and is connected with a sleeve 10, the sleeve 10 is sealingly rotatably connected to a hollow rotating rod 15, a plurality of air inlet holes 20 connecting the interior of the sleeve 10 and the hollow rotating rod 15 are provided on the hollow rotating rod 15, a second air groove is provided in the second blade 23, a second air hole connecting the second air groove and the interior of the hollow rotating rod 15 is provided on the hollow rotating rod 15, a second air groove is connected with a second jet hole 29 at one end away from the second air hole, the first jet hole 28 and the second jet hole 29 are both connected with the interior of the mixing barrel 1, and the jet directions of the two jet holes are consistent with the flow direction of nearby water.

[0061] In the present invention, firstly, nano titanium dioxide powder and dispersant are added into the high-speed stirrer 3 from the injection port 2, and the high-speed stirrer 3 is started. The high-speed stirrer 3 stirs the nano titanium dioxide powder and the dispersant at a high speed to obtain a titanium dioxide suspension.

[0062] After high-speed stirring, the nano titanium dioxide powder has been preliminarily dispersed in the medium, so that when the solution is stirred, the nano titanium dioxide powder can be dispersed faster and more evenly throughout the system. In addition, for the nano titanium dioxide powder that is easy to agglomerate, forming a suspension first helps to break its agglomeration state, and then further refine and disperse it through stirring, thereby improving the uniformity of the mixture;

[0063] Then start the water pump 4 to deliver the suspension into the mixing barrel 1 through the delivery pipe 5, the discharge port 12 and the through hole on the discharge port 12;

[0064] The nitrogen generating device 7 works, and its output end outputs nitrogen through the air delivery pipe 11 and the three hollow fixed rods 16. The three hollow fixed rods 16 pass the nitrogen into the first air groove in the first blade 21 through the annular cavity in the rotating ring 24 and the first air hole, and finally spray it into the mixing barrel 1 through the first jet hole 28, while the air delivery pipe 11 passes through the sleeve 10, the air inlet hole 20, the inside of the hollow rotating rod 15 and the second air hole into the second air groove in the second blade 23, and finally sprays it into the mixing barrel 1 through the second jet hole 29;

[0065] Filling with nitrogen can reduce the oxygen content in the mixing barrel 1. The reduction of oxygen helps to reduce the charge imbalance caused by oxidation on the surface of the titanium dioxide powder particles, thereby reducing the electrostatic attraction and reducing the agglomeration of titanium dioxide;

[0066] The jetting directions of the first jet hole 28 and the second jet hole 29 are consistent with the flow direction of the nearby water flow, so that the nitrogen can be more smoothly integrated into the water flow, reducing the relative movement between the gas and the water flow, thereby reducing the formation and aggregation of bubbles in the liquid, which means that more gas can be dissolved in the liquid instead of existing in the form of bubbles;

[0067] The jet airflow can also be combined with the flow direction of the water flow to increase the turbulence and mixing effect during the stirring process, making the mixing of the coating components more uniform and rapid, and helping to reduce the local agglomeration caused by uneven mixing. In addition, in the process of gradually filling with nitrogen, nitrogen will gradually occupy the space originally occupied by air. This physical replacement process will push the bubbles in the solution to the liquid surface and then escape;

[0068] At this time, the motor 9 is started, the hollow rotating rod 15 rotates, and the second blade 23 is directly driven to rotate. In addition, when the hollow rotating rod 15 rotates, the second gear 27 also rotates accordingly. At this time, the second gear 27 rotates the inner gear 25 through the first gear 26, and finally the first blade 21 on the rotating ring 24 rotates, so that the first blade 21 and the second blade 23 rotate in the same direction. Compared with the rotation of a single blade, the blades rotating in the same direction but at different speeds can form a complex fluid flow pattern, and compared with the reverse rotation, the flow pattern is more orderly, which helps to reduce the friction and collision between materials.

[0069] When the second blade 23 rotates, the scraper 22 thereon continuously scrapes the first blade 21, so that the first blade 21 and the second blade 23 shake during the rotation process, thereby preventing the titanium dioxide powder from being adsorbed on the blade during the stirring process;

[0070] When the second blade 23 rotates, it pushes the liquid near it to flow upward, and flips the titanium dioxide suspension coming out of the discharge port 12 upward from the bottom of the mixing barrel 1, so that the materials are mixed more evenly, and the gas generated by the high-speed stirrer 3 rises upward and finally escapes from the exhaust port 8; when the first blade 21 rotates, it pushes the liquid near it to flow downward, and the first blade 21 refines and disperses the material flipped up by the second blade 23 when rotating, ensuring sufficient contact and mixing between the materials;

[0071] In addition, the edge of the first blade 21 is serrated. The sharp teeth of the serrated edge can more effectively generate a local high pressure and velocity gradient in the fluid when rotating, thereby enhancing the friction and shearing effect between the fluid and the blade edge. This enhanced friction and shearing effect helps to break the agglomeration of titanium dioxide powder and promote uniform mixing of the coating. It can also reduce the size of bubbles and increase the contact area between bubbles and liquid, which is conducive to the gas in the bubbles to escape into the air faster.

[0072] Among the three fan blade groups, the first fan blade group 17 is close to the liquid surface, and the blade inclination angles of the first fan blade 21 and the second fan blade 23 in the first fan blade group 17 are smaller than the blade inclination angles of the first fan blade 21 and the second fan blade 23 in the second fan blade group 18 and the third fan blade group 19. The diameter of the first gear 26 in the first fan blade group 17 is larger than the diameter of the first gear 26 in the second fan blade group 18 and the third fan blade group 19. In this way, the first fan blade 21 can rotate at a slower speed, and the entire first fan blade group 17 has less disturbance on the liquid surface. When the second fan blade group 18 and the third fan blade group 19 rotate, they can obtain greater driving force and shear force, further dispersing and mixing the suspension evenly;

[0073] In addition, the spacing between the first blade group 17 and the second blade group 18 is greater than the spacing between the second blade group 18 and the third blade group 19, which is conducive to quickly breaking up the suspension when it is just injected, reducing the accumulation and stratification of materials at the bottom, and improving the mixing uniformity. As the suspension gradually rises, the spacing between the upper blade groups increases. Although it may slightly reduce the mixing efficiency, it helps to avoid excessive shearing and compression and maintain the physical and chemical stability of the solution;

[0074] The bottom of the mixing barrel 1 is funnel-shaped. Due to gravity, the titanium dioxide powder that is easy to agglomerate tends to gather at the bottom of the funnel. At this time, the scraper 13 rotates with the hollow rotating rod 15 to scrape the bottom of the mixing barrel 1, breaking up the agglomerated titanium dioxide powder and redistributing it to other areas of the mixing barrel 1, thereby improving the stirring effect and mixing uniformity.

[0075] After the mixing and preparation of the self-cleaning and environmentally friendly coating material in the mixing barrel 1 is completed, the self-cleaning and environmentally friendly coating material can be obtained by completing the discharging operation through the discharging pipe.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a self-cleaning environmentally friendly coating material, characterized in that: It relates to a preparation device for a self-cleaning environmentally friendly coating material, comprising: Mixing bucket (1); A titanium dioxide suspension liquid supply mechanism, the titanium dioxide suspension liquid supply mechanism being installed outside the stirring barrel (1), and the output end of the titanium dioxide suspension liquid supply mechanism being connected to the bottom of the stirring barrel (1); A stirring mechanism, the stirring mechanism comprising a motor (9), the motor (9) being mounted on the top of a stirring barrel (1), the output end of the motor (9) penetrating the top wall of the stirring barrel (1) and being coaxially fixedly connected to a hollow rotating rod (15), the hollow rotating rod (15) being connected to three sets of fan blades, the fan blades comprising a transmission assembly, a first fan blade (21) and a second fan blade (23), the input end of the transmission assembly being connected to the hollow rotating rod (15), and the output end being connected to the first fan blade (21), the second fan blade (23) being connected to the hollow rotating rod (15) The first blade (21) has a window on the inner side thereof for the second blade (23) to rotate. The transmission assembly comprises two rotating rings (24). The two rotating rings (24) are coaxially rotatably connected to the hollow rotating rod (15). The outer sides of the two rotating rings (24) are coaxially fixedly connected to the same first blade (21). One of the rotating rings (24) is coaxially fixedly connected to an internal gear (25). The inner wall of the mixing barrel (1) is fixedly connected to a fixed rod (14). The fixed rod (14) is rotatably connected to the first gear at one end thereof away from the inner wall of the mixing barrel (1). (26), one side of the first gear (26) is meshed with the internal gear (25), and the other side is meshed with a second gear (27), the second gear (27) is coaxially fixedly connected to the hollow rotating rod (15), the output axis of the second blade (23) is axially upward along the hollow rotating rod (15), the output axis of the first blade (21) is axially downward along the hollow rotating rod (15), the three blade groups are a first blade group (17), a second blade group (18) and a third blade group (19), the first blade group (17) is close to the liquid surface, and the second blade group (21) is axially downward along the hollow rotating rod (15). The blade inclination angles of the first blade (21) and the second blade (23) in a blade group (17) are smaller than the blade inclination angles of the first blade (21) and the second blade (23) in the second blade group (18) and the third blade group (19); the diameter of the first gear (26) in the first blade group (17) is larger than the diameter of the first gear (26) in the second blade group (18) and the third blade group (19); the spacing between the first blade group (17) and the second blade group (18) is larger than the spacing between the second blade group (18) and the third blade group (19); A nitrogen charging mechanism, wherein the nitrogen charging mechanism is connected to a stirring barrel (1), the output end of the nitrogen charging mechanism is in communication with the interior of the stirring barrel (1), the top of the stirring barrel (1) is in communication with an exhaust port (8), the edge of the first fan blade (21) is serrated, the nitrogen charging mechanism comprises a nitrogen generating device (7), the output end of the nitrogen generating device (7) is in communication with an air delivery pipe (11) and three hollow fixed rods (16), the ends of the three hollow fixed rods (16) away from the nitrogen generating device (7) are all sealed and penetrate the stirring barrel (1), and are all in communication with an annular cavity, the annular cavity is provided in another rotating ring (24), a plurality of first air grooves are provided in the first fan blade (21), a first air hole connecting the annular cavity and the first air grooves is provided in another rotating ring (24), and the plurality of first air grooves are away from the rotating ring ( 24) is connected to a first jet hole (28), one end of the air delivery pipe (11) is sealed and penetrates the mixing barrel (1) at one end away from the nitrogen generating device (7), and is connected to a sleeve (10), the sleeve (10) is sealed and rotatably connected to the hollow rotating rod (15), the hollow rotating rod (15) is provided with a plurality of air inlet holes (20) connecting the inside of the sleeve (10) and the hollow rotating rod (15), a second air groove is provided in the second fan blade (23), a second air hole connecting the second air groove and the inside of the hollow rotating rod (15) is provided on the hollow rotating rod (15), the second air groove is connected to a second jet hole (29) at one end away from the second air hole, the first jet hole (28) and the second jet hole (29) are both connected to the inside of the mixing barrel (1), and the jetting directions of the two jet holes are consistent with the flow direction of nearby water flow; The following steps are also included: S1: The titanium dioxide suspension supply mechanism works to deliver the titanium dioxide suspension into the bottom of the stirring barrel (1); S2: starting the motor (9), the output end of the motor (9) drives the hollow rotating rod (15) to rotate, the rotation of the hollow rotating rod (15) drives the three sets of fan blades to rotate to stir the solution in the stirring barrel (1), the three fan blades are composed of a transmission component, a first fan blade (21) and a second fan blade (23), the rotation of the hollow rotating rod (15) drives the first fan blade (21) to rotate through the transmission component, and directly drives the second fan blade (23) to rotate, so that the first fan blade (21) and the second fan blade (23) rotate in the same direction at different speeds, forming a complex and orderly fluid, which helps to reduce friction and collision between materials; S3: When the second fan blade (23) rotates, it pushes the nearby water flow to flow upward, and when the first fan blade (21) rotates, it pushes the nearby water flow to flow downward, thereby improving the solution mixing effect; S4: When the motor (9) is working, the nitrogen charging mechanism delivers nitrogen into the mixing barrel (1), thereby reducing the oxygen content in the mixing barrel (1), reducing the agglomeration of titanium dioxide, and allowing the nitrogen to blend more smoothly into the water flow.

2. The method for preparing a self-cleaning environmentally friendly coating material according to claim 1, characterized in that: A bracket (6) is fixedly connected to the bottom of the stirring barrel (1), and a through hole is provided on the bracket (6) for the output end of the titanium dioxide suspension liquid supply mechanism to pass through.

3. The method for preparing a self-cleaning environmentally friendly coating material according to claim 2, characterized in that: The titanium dioxide suspension supply mechanism comprises a high-speed stirrer (3), the high-speed stirrer (3) being installed outside the stirring barrel (1) and being connected to a material injection port (2) at the top, a water pump (4) being installed at the bottom of the high-speed stirrer (3), the input end of the water pump (4) being connected to an output end of the high-speed stirrer (3), the output end of the water pump (4) being connected to a delivery pipe (5), the delivery pipe (5) having an end away from the water pump (4) passing through a through opening and sealingly passing through the bottom of the stirring barrel (1), and being connected to a discharge port (12), the side of the discharge port (12) being provided with a plurality of through holes connecting the delivery pipe (5) and the inside of the stirring barrel (1).

4. The method for preparing a self-cleaning environmentally friendly coating material according to claim 1, characterized in that: A scraper (22) is fixedly connected to the outer side of the second fan blade (23); the scraper (22) is elastic; and a side of the scraper (22) away from the second fan blade (23) is pressed into contact with an edge of the window of the first fan blade (21) when the second fan blade (23) rotates.

5. The method for preparing a self-cleaning environmentally friendly coating material according to claim 1, characterized in that: The bottom end of the hollow rotating rod (15) is connected to a scraping assembly, the scraping assembly comprising a scraper (13), the bottom of the mixing barrel (1) is funnel-shaped, and the bottom of the scraper (13) is gap-matched with the bottom of the mixing barrel (1).

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