Composite anticorrosive paint and preparation method of anticorrosive paint

Abstract

The application provides a kind of composite anticorrosive paint and the preparation method of anticorrosive paint, it is related to paint grinding equipment technical field, the production equipment of the application includes operation platform, the upper end of operation platform is equipped with fixed cabin, the upper end of fixed cabin is equipped with feed hopper, the side of fixed cabin is equipped with grinding cylinder, wherein the inside of grinding cylinder is provided with mixed grinding unit, wherein the paint raw material particles to be ground can be put into the inside of grinding cylinder from feed hopper, grinding part rotates in the inside of grinding cylinder to drive grinding sand to grind raw material in the inside of grinding cylinder, wherein the finished paint can be filtered through filtering unit and then discharged from discharge pipe, the application adopts multi-stage grinding structure combined with radial stirring and axial tumbling, improves the paint grinding efficiency and fineness uniformity, increases the collision probability of grinding sand and paint raw material, shortens the grinding period, and the particle size distribution of ground paint is uniform, improves the product quality of composite anticorrosive paint.

Description

Technical Field

[0001] This invention relates to the field of coating grinding equipment technology, and in particular to a composite anti-corrosion coating and a method for preparing the anti-corrosion coating. Background Technology

[0002] Grinding and dispersing composite anti-corrosion coatings is a core process in coating production. The fineness of grinding and the uniformity of dispersion of pigments, functional fillers, and additives directly determine the anti-corrosion barrier performance, adhesion, and weather resistance of the coating. Horizontal sand mills are currently the most widely used grinding equipment in coating production. They rely on the stirring structure inside the cylinder to drive the movement of grinding sand, and achieve the fine dispersion of coating raw materials through the collision and shearing action of the grinding sand.

[0003] Horizontal sand mills typically employ a single main shaft driving straight stirring blades. These blades can only move the grinding sand radially, with extremely weak axial dispersion. During prolonged grinding, denser pigments and fillers, along with the grinding sand, easily settle and accumulate at the bottom of the grinding drum due to gravity. Simultaneously, grinding dead zones with weak material flow easily form at both ends of the drum. Raw materials in these accumulation zones and dead zones cannot receive sufficient collision and shearing action, significantly lengthening the overall grinding cycle, reducing production efficiency, and resulting in uneven particle size distribution in the final coating. Some large particles cannot be ground to the required fineness, directly affecting the film quality of composite anti-corrosion coatings. This is especially true for anti-corrosion coatings containing flake-like functional fillers such as glass flakes and mica iron oxide. The single radial stirring method easily causes the flake fillers to stack and agglomerate, making uniform dispersion difficult and even damaging the filler's lamellar structure, weakening the coating's shielding and anti-corrosion effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a composite anti-corrosion coating and a method for preparing the anti-corrosion coating.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for preparing a composite anti-corrosion coating, comprising production equipment, the production equipment including an operating table, a fixed chamber installed at the upper end of the operating table, a feed hopper installed at the upper end of the fixed chamber, and a grinding cylinder installed on the side of the fixed chamber, wherein a mixing and grinding unit is provided inside the grinding cylinder, wherein the coating raw material particles to be ground can be fed from the feed hopper into the interior of the grinding cylinder, the grinding section rotates inside the grinding cylinder, driving the grinding sand to grind the raw material inside the grinding cylinder, wherein the ground coating can be filtered through a filtration unit and then discharged from the discharge pipe. It should be noted that the discharge valve connected to the discharge pipe is closed during the grinding process, and opens when discharge is required for material discharge. Preferably, one end of the grinding cylinder is detachably assembled with the mounting part and the fixed chamber, the bottom of the feeding hopper is connected to the feeding port, the feeding port extends into the grinding cylinder, and a circulation unit is provided on the surface of the grinding cylinder near both ends, wherein the circulation unit allows the grinding sand inside the grinding cylinder to circulate back and forth.

[0006] Preferably, the circulation unit includes an air pump, which is fixedly installed on the side of the operating table. An air supply pipe is installed at the output end of the air pump, and the port of the air supply pipe is connected to one end of the grinding cylinder via a one-way valve. The one-way valve allows high-pressure air to be introduced into the grinding cylinder in one direction, thereby agitating the grinding sand inside the grinding cylinder. A circulation interface is installed on the surface of the grinding cylinder near the other end, and a detachable intercepting net is installed in the circulation interface. During the grinding sand circulation process, the intercepting net can prevent the grinding sand from being ejected from the grinding cylinder. When it is necessary to collect the grinding sand, the intercepting net can be removed to discharge the grinding sand from the circulation interface for collection.

[0007] Preferably, the upper end of the operating table is equipped with a track, and the bottom of the grinding cylinder is equipped with a conveyor frame. The rollers on the conveyor frame can roll along the track direction. When disassembling the grinding cylinder, the rollers on the conveyor frame can be used to move the grinding cylinder on the track to remove it for internal inspection.

[0008] Preferably, the grinding section includes an assembly ring detachably installed inside the grinding cylinder. Multiple crushing strips are installed on the inner wall of the assembly ring, and the multiple crushing strips are arranged in a circumferential array on the inner wall of the assembly ring. The ports of the crushing strips face the drive shaft. Multiple sets of arc-shaped mixing fan blades are provided on the surface of the drive shaft. During the rotation of the arc-shaped mixing fan blades, the grinding sand can be driven to mix and crush the coating raw materials inside the grinding cylinder. An axial grinding section that can stir and tamp the grinding sand is provided between adjacent sets of arc-shaped mixing fan blades.

[0009] Preferably, the axial grinding section includes a stirring impeller, wherein an assembly shaft is rotatably mounted in the middle of the stirring impeller, and the assembly shaft is fixedly installed inside the grinding cylinder. The two sides of the stirring impeller are respectively engaged with two adjacent arc-shaped mixing fan blades. One of the two adjacent arc-shaped mixing fan blades is fixed relative to the drive shaft, and the other is fixed to the drive shaft by means of a bearing. When one of the arc-shaped mixing fan blades rotates, it drives the stirring impeller to rotate, and then the stirring impeller drives the other arc-shaped mixing fan blade to rotate in the opposite direction. Multiple directions of rotation can be used to drive the grinding sand to impact and grind the coating material inside the grinding cylinder for grinding.

[0010] Preferably, a partition ring is installed in the middle of the grinding cylinder, and the two edges of the inner wall of the partition ring are provided with a collecting surface, which can be used to block the grinding sand and increase the flow path of the grinding sand.

[0011] Preferably, the filtration unit includes an assembly frame, which is fixedly installed inside the grinding cylinder. The drive shaft and the assembly frame are rotatably mounted together. A filter screen is provided on the surface of the assembly frame, through which the ground coating powder passes through the filter screen and is discharged through the discharge pipe.

[0012] Preferably, a spring is fixedly mounted on the surface of the drive shaft, and an impact ring is fixedly connected to the end of the spring. During the input of high-pressure air by the air pump, the impact ring compresses and bends the spring, allowing it to vibrate and impact the filter screen to ensure its conductivity. An inspection door is installed on the side of the operating platform, allowing for the inspection and maintenance of internal components. A sealing plate is installed at the end of the grinding cylinder via a flange, and the sealing plate can be removed to replace the filter screen and internal parts. A foot cup is provided at the bottom of the operating platform, allowing for adjustment of the overall position. A control panel is provided on the side of the fixed chamber, which can be used to control the mixing motor inside the fixed chamber to drive the drive shaft to rotate, and also to control the air pump to mix and grind the grinding sand inside the grinding cylinder.

[0013] Preferably, the preparation method comprises the following steps: S1. Weigh each raw material component according to the preset coating ratio, check the status of the production equipment, confirm that the grinding cylinder is firmly assembled with the fixed chamber by means of the assembly part, the discharge valve on the discharge pipe is in the closed state, the interception net is installed in the circulation interface, and put a certain amount of grinding sand into the grinding cylinder from the feed hopper.

[0014] S2. The weighed epoxy resin, solvent, and additives are added sequentially from the feed hopper. The raw materials fall into the grinding cylinder through the feed port. The mixing motor in the fixed chamber is started through the control panel, which drives the drive shaft to rotate the arc-shaped mixing fan blades at low speed, causing the grinding sand and raw materials to be initially mixed and dispersed in the grinding cylinder.

[0015] S3. After the initial mixing is completed, the drive shaft speed is increased. Multiple sets of arc-shaped mixing fan blades drive the grinding sand to impact the coating raw material particles at high speed. In conjunction with the crushing strips on the inner wall of the assembly ring, large particles of raw material are sheared and crushed. At the same time, the axial grinding part between adjacent fan blades drives the grinding sand to perform axial tumbling motion, grinding and refining the raw material from multiple directions.

[0016] S4. Start the air pump. High-pressure air is continuously introduced into the grinding cylinder through the air supply pipe and one-way valve, which blows the grinding sand and raw materials to circulate back and forth along the axis in the grinding cylinder. When the grinding sand flows through the separator ring, it is guided by the collection surface to change the flow direction, extend the flow path, and further improve the grinding uniformity.

[0017] S5. During the grinding process, a small amount of coating is sampled from the sampling port at fixed intervals to test the fineness. If the fineness does not meet the process requirements, the grinding process continues. If the fineness of the coating is found to meet the standard, the operation of the air pump and drive shaft is stopped, and the material is discharged.

[0018] S6. Open the discharge valve on the discharge pipe. The ground coating flows to the filter unit under the action of airflow and gravity. The coating powder passes through the mesh of the filter screen and is discharged and collected from the discharge pipe. Particles that do not meet the size requirements and grinding sand are intercepted by the filter screen and left in the grinding cylinder for further grinding.

[0019] S7. During the discharge process, the air pump is started intermittently. The high-pressure airflow drives the spring and impact ring on the drive shaft to vibrate. The impact ring intermittently impacts the back of the filter screen, shaking off the particles that are blocked in the mesh, ensuring the conductivity of the filter screen and the discharge speed.

[0020] S8. After all paint has been discharged, turn off the equipment power, remove the interceptor screen at the circulation interface, and start the air pump to blow the grinding sand out of the circulation interface for collection. When deep cleaning or maintenance is required, loosen the connecting parts of the assembly section, and use the rollers of the conveyor frame to pull the grinding cylinder outward along the track. Open the sealing plate to replace the filter screen or repair internal components. Preferably, a composite anti-corrosion coating is characterized by: employing a composite anti-corrosion coating preparation method, wherein the coating comprises epoxy resin, organosilicon-modified epoxy resin, mica iron oxide, glass flakes, precipitated barium sulfate, zinc phosphate, polyamide wax thixotropic anti-settling agent, polyacrylate wetting and dispersing agent, polyether-modified siloxane defoamer, xylene as the main solvent, and n-butanol as the co-solvent, in a ratio of 26:6:20:12:13:9:1.2:0.8:0.5:5.2 (the remainder being irrelevant elements).

[0021] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, a multi-stage grinding structure combining radial stirring and axial tumbling is adopted, which improves the grinding efficiency and fineness uniformity of the coating. Traditional horizontal sand mills mostly rely on stirring blades in only one direction to drive the grinding sand to move, resulting in weak axial dispersion ability. Material is prone to local accumulation and grinding dead corners, leading to uneven fineness of the final coating and long grinding cycle. The drive shaft drives multiple sets of arc-shaped mixing fan blades to rotate radially, and the crushing strips on the inner wall of the assembly ring shear and crush large particles of raw materials. At the same time, the axial grinding part between adjacent fan blades can drive the grinding sand to axially reciprocate and tumble, forming a multi-dimensional grinding motion. This increases the collision probability between the grinding sand and the coating raw materials, which can quickly grind pigments and fillers to the target fineness, effectively shorten the grinding cycle, and the particle size distribution of the ground coating is uniform, thus improving the product quality of composite anti-corrosion coatings.

[0022] 2. In this invention, an air-driven circulating grinding system is set up to achieve full-cylinder circulation of grinding sand, avoiding the problem of material settling and clumping. In traditional grinding equipment, the material and grinding sand inside are prone to settling and accumulating at the bottom of the cylinder due to gravity, resulting in a large difference in grinding effect between the upper and lower layers. An additional conveying pump is required to achieve material circulation, which is not only structurally complex but also prone to problems such as pump wear and seal leakage. By introducing high-pressure airflow into the grinding cylinder through an air pump, the grinding sand and material are blown to circulate back and forth along the axial direction. In conjunction with the middle partition ring and the collection surface, the flow channel direction is changed, and the flow path of the grinding sand is extended, so that the grinding sand and raw materials can fully contact and mix in the entire cylinder. Continuous circulating grinding can be achieved without the need for an additional conveying pump, effectively avoiding material settling and clumping, further improving grinding uniformity, and simplifying the equipment structure while reducing the failure rate.

[0023] 3. In this invention, a track-type detachable grinding cylinder structure is adopted, which greatly reduces the difficulty of equipment inspection and maintenance and downtime. The grinding cylinders of traditional grinding equipment are mostly fixed installations. Changing grinding sand, cleaning the inside of the equipment, and replacing vulnerable parts all require disassembling a large number of external structures, which is cumbersome and has a long downtime, seriously affecting the production progress. The grinding cylinder is detachably connected to the fixed chamber through the assembly part. The bottom is equipped with a conveyor frame with rollers, which can be pulled out smoothly along the track at the top of the operating table. The grinding cylinder can be moved out as a whole for deep cleaning, component replacement or fault repair without the need for large hoisting equipment. At the same time, a flange sealing plate is set at the end of the grinding cylinder, which can be quickly opened to replace internal components such as filters. An inspection door is set on the side of the operating table to directly inspect the internal electrical components. Daily maintenance is convenient and efficient, effectively improving the continuous operation time and production utilization rate of the equipment.

[0024] 4. In this invention, an airflow-driven self-cleaning filter structure is adopted, which effectively solves the industry problem of easy clogging of the discharge filter. The discharge filter of traditional paint grinding equipment is easily clogged by unground particles and powders during the production process, resulting in a decrease or even interruption of the discharge speed. Frequent machine stops are required to disassemble the filter for manual cleaning, which seriously affects production efficiency. By setting a spring and an impact ring on the drive shaft, the high-pressure airflow input by the air pump can drive the spring to reciprocate and vibrate, so that the impact ring intermittently impacts the back of the filter, automatically shaking off the particles clogging the mesh, maintaining the conductivity of the filter, and achieving online cleaning of the filter without stopping the machine. This ensures the stability of the discharge speed, reduces the frequency of manual cleaning, and reduces the labor intensity of operators. Attached Figure Description

[0025] Figure 1 This invention presents a three-dimensional structural schematic diagram of a composite anti-corrosion coating and a method for preparing the anti-corrosion coating. Figure 2 This is a partial schematic diagram from another angle illustrating the composite anti-corrosion coating and its preparation method proposed in this invention. Figure 3 This invention proposes a composite anti-corrosion coating and a method for preparing the anti-corrosion coating. Figure 2 Internal diagram; Figure 4 This is a partial schematic diagram of the grinding section in the composite anti-corrosion coating and the preparation method of the anti-corrosion coating proposed in this invention; Figure 5 This invention proposes a composite anti-corrosion coating and a method for preparing the anti-corrosion coating. Figure 4 Partial schematic diagram; Figure 6 This is a partial schematic diagram of the filtration unit in the composite anti-corrosion coating and the preparation method of the anti-corrosion coating proposed in this invention; Figure 7 This invention proposes a composite anti-corrosion coating and a method for preparing the anti-corrosion coating. Figure 6 Partial schematic diagram; Figure 8 This is a partial schematic diagram of the broken strips in the composite anti-corrosion coating and the preparation method of the anti-corrosion coating proposed in this invention; Figure 9 This invention provides a composite anti-corrosion coating and a method for preparing the anti-corrosion coating, which includes a partial cross-sectional view of the separator ring.

[0026] Legend: 1. Control panel; 2. Fixed chamber; 3. Feed hopper; 4. Circulation interface; 5. Grinding cylinder; 6. Discharge pipe; 7. Air pump; 8. Air supply pipe; 9. Track; 10. Conveyor frame; 11. Control panel; 12. Feed inlet; 13. Drive shaft; 14. Assembly ring; 15. Crushing bar; 16. Arc-shaped mixing fan blade; 17. Axial grinding part; 18. Assembly shaft; 19. Separating ring; 20. Converging surface; 21. Assembly frame; 22. Filter screen; 23. Impact ring; 24. Spring; 25. Foot cup; 26. Inspection door; 27. Sealing plate; 28. Assembly part. Detailed Implementation

[0027] Example 1, such as Figure 1-9As shown, a composite anti-corrosion coating and its preparation method are disclosed. The method includes an operating table 1 made of welded steel profiles. A closed fixed chamber 2 is fixedly installed on one side of the upper end of the operating table 1. A funnel-shaped feed hopper 3 is vertically installed on the upper end of the fixed chamber 2. A cylindrical grinding cylinder 5 is horizontally installed on the outer side of the fixed chamber 2. A mixing and grinding unit is provided inside the grinding cylinder 5. The coating raw material particles to be ground can be fed from the feed hopper 3 and transported to the inside of the grinding cylinder 5 through the channel inside the fixed chamber 2. The grinding part rotates inside the grinding cylinder 5, causing the grinding sand to continuously roll and impact the grinding raw material inside the grinding cylinder 5. The ground coating can be filtered through a filter unit and then discharged from the discharge pipe 6. A discharge valve is connected to the discharge pipe 6. The discharge valve is kept closed during the grinding process and is opened when discharge is required. One end of the grinding cylinder 5 is detachably assembled with the side of the fixed chamber 2 via the assembly part 28. The bottom of the feed hopper 3 is connected to an inclined feed port 12. The end of the feed port 12 extends into the interior of the grinding cylinder 5 near the end. A circulation unit is provided on the surface of the grinding cylinder 5 near both ends. The circulation unit can drive the grinding sand inside the grinding cylinder 5 to circulate back and forth along the axial direction, avoiding local accumulation of grinding sand and affecting the grinding effect. The circulation unit includes an air pump 7, which is fixedly installed on the side of the operating table 1. The output end of the air pump 7 is equipped with a high-pressure resistant air supply pipe 8. The port of the air supply pipe 8 is connected to the end of the grinding cylinder 5 near the fixed chamber 2 via a one-way valve. The one-way valve can input high-pressure air into the grinding cylinder 5 in one direction. The high-pressure air blows the grinding sand inside the grinding cylinder 5 to flow to the other end. A circulation interface 4 is installed on the surface of the grinding cylinder 5 near the other end. A detachable intercepting net is installed in the circulation interface 4. During the grinding sand circulation, the intercepting net can prevent the grinding sand from being sprayed out of the grinding cylinder 5. When it is necessary to collect the grinding sand, the intercepting net can be removed and the grinding sand can be discharged from the circulation interface 4 for collection. Two parallel tracks 9 are installed on the upper end of the operating table 1, corresponding to the bottom of the grinding cylinder 5. A conveyor frame 10 is fixedly installed at the bottom of the grinding cylinder 5. The rollers at the lower end of the conveyor frame 10 can roll along the direction of the tracks 9. When disassembling the grinding cylinder 5, the rollers on the conveyor frame 10 can be used to move smoothly on the tracks 9 to pull out and remove the grinding cylinder 5 for inspection and cleaning. The grinding part includes an assembly ring 14 that is detachably installed inside the grinding cylinder 5. Multiple long strip-shaped crushing strips 15 are fixedly installed on the inner wall of the assembly ring 14. The multiple crushing strips 15 are arranged in a circumferential array on the inner wall of the assembly ring 14. The free ends of the crushing strips 15 face the central drive shaft 13. Multiple sets of arc-shaped mixing fan blades 16 are fixedly installed on the surface of the drive shaft 13. During the rotation of the arc-shaped mixing fan blades 16, the grinding sand can be driven to continuously tumble and mix inside the grinding cylinder 5, and cooperate with the crushing strips 15 to shear and crush the coating raw materials. An axial grinding part 17 that can stir and tumble the grinding sand is provided between adjacent sets of arc-shaped mixing fan blades 16.The axial grinding section 17 includes a stirring impeller. An assembly shaft 18 is rotatably mounted in the center of the stirring impeller. The assembly shaft 18 is horizontally fixed inside the grinding cylinder 5. The two sides of the stirring impeller engage with two adjacent arc-shaped mixing blades 16. One of the two adjacent arc-shaped mixing blades 16 is fixed relative to the drive shaft 13, while the other is rotatably connected to the drive shaft 13 via a bearing. When one arc-shaped mixing blade 16 rotates, it drives the stirring impeller to rotate around the assembly shaft 18. The stirring impeller then drives the other arc-shaped mixing blade 16 to rotate in the opposite direction. This multi-directional rotation drives the grinding sand to impact the grinding coating material in multiple dimensions inside the grinding cylinder 5 for grinding. A partition ring 19 is fixedly installed on the inner wall of the middle part of the grinding cylinder 5. Inclined collecting surfaces 20 are provided on both edges of the inner wall of the partition ring 19. The partition ring 19 can be used to block the rapidly flowing grinding sand, change the flow direction of the grinding sand, increase the flow path of the grinding sand, and prolong the grinding time. The filtration unit includes an assembly frame 21, which is fixedly installed inside the grinding cylinder 5 near the discharge end. The end of the drive shaft 13 is rotatably mounted between the assembly frame 21 and the end of the drive shaft 13. A filter screen 22 is fixedly installed on the surface of the assembly frame 21. Paint powder ground to the required fineness can pass through the mesh of the filter screen 22 and be discharged and collected through the discharge pipe 6. An elastic spring 24 is fixedly installed on the surface of the drive shaft 13 near the filter screen 22. An annular impact ring 23 is fixedly connected to the free end of the spring 24. During the input of high-pressure air from the air pump 7, the impact ring 23 is compressed by the airflow, causing the spring 24 to bend. The elasticity of the spring 24 causes the impact ring 23 to vibrate and impact the back of the filter screen 22, ensuring the conductivity of the filter screen 22. An openable maintenance door 26 is installed on the side of the operating table 1, allowing for the inspection and maintenance of the internal electrical components. The grinding cylinder 5... The outer end port is equipped with a sealing plate 27 via a flange. The sealing plate 27 can be removed to replace and repair the filter screen 22 and the internal grinding components. The bottom of the operating table 1 is equipped with multiple foot cups 25. The overall horizontal position of the equipment can be adjusted by adjusting the height of the foot cups 25. The side of the fixed chamber 2 is equipped with a control panel 11. The control panel 11 can be used to control the mixing motor inside the fixed chamber 2 to drive the drive shaft 13 to rotate. The control panel 11 can also be used to control the start and stop and power of the air pump 7, so that the grinding sand is fully mixed and ground inside the grinding cylinder 5.

[0028] Working principle: During use, first weigh each raw material component according to the ratio of the composite anti-corrosion coating, check the condition of each part of the equipment, confirm that the grinding cylinder 5 is firmly assembled with the fixed chamber 2 via the assembly part 28, the discharge valve on the discharge pipe 6 is in the closed state, and the interception net is installed in the circulation interface 4. Then, feed a measured amount of grinding sand into the grinding cylinder 5 from the feed hopper 3. Add the weighed epoxy resin, solvent, and additives sequentially from the feed hopper 3. The raw materials fall into the grinding cylinder 5 through the feed inlet 12. Start the mixing motor in the fixed chamber 2 via the control panel 11, which drives the drive shaft 13 to rotate the arc-shaped mixing fan blades 16 at low speed, causing the grinding sand and raw materials to be initially mixed and dispersed within the grinding cylinder 5. After initial mixing, the speed of the drive shaft 13 is increased. Multiple sets of arc-shaped mixing fan blades 16 drive the grinding sand to tumble at high speed, impacting the paint raw material particles. This, combined with the crushing strips 15 on the inner wall of the assembly ring 14, shears and crushes large particles. Simultaneously, the axial grinding section 17 between adjacent fan blades, through the rotation of the churning impeller and the cooperation of the counter-rotating fan blades, drives the grinding sand to perform axial churning motion, grinding and refining the raw material from multiple directions, both radially and axially, improving grinding efficiency and uniformity. The air pump 7 is started, and high-pressure air is continuously introduced into the grinding cylinder 5 through the air supply pipe 8 and a one-way valve, causing the grinding sand and raw material to circulate axially within the grinding cylinder 5. When the grinding sand flows through the middle separating ring 19, it is guided by the two converging surfaces 20 to change its flow direction, extending the flow path and ensuring full contact between the grinding sand and the raw material, further improving grinding uniformity and preventing the raw material from settling and clumping. During the grinding process, a small amount of coating can be sampled from the sampling port at fixed intervals to test its fineness. If the fineness does not meet the process requirements, the grinding process continues. If the fineness of the coating meets the requirements, the operation of the air pump 7 and the drive shaft 13 is stopped, and the material discharge process begins. The discharge valve on the discharge pipe 6 is opened, and the ground coating flows to the end filter unit under the action of airflow and gravity. The coating powder that meets the fineness requirements passes through the mesh of the filter screen 22 and is discharged and collected from the discharge pipe 6. Particles and grinding sand that do not meet the particle size requirements are intercepted by the filter screen 22 and remain in the grinding cylinder 5 to continue grinding. During the material discharge process, the air pump 7 is started intermittently. The high-pressure airflow drives the spring 24 and the impact ring 23 on the drive shaft 13 to reciprocate. The impact ring 23 intermittently impacts the back of the filter screen 22, shaking off the particles and powder that are blocked in the mesh, ensuring the conductivity of the filter screen 22 and the discharge speed, and avoiding filter screen blockage that affects the discharge efficiency. After all the paint is discharged, turn off the power to the equipment, remove the interceptor screen at the circulation interface 4, and start the air pump 7 to blow the grinding sand out of the circulation interface 4 for collection. When deep cleaning or maintenance is required, loosen the connecting parts of the assembly part 28, and use the rollers of the conveyor frame 10 to pull the grinding cylinder 5 outward along the track 9. Open the end sealing plate 27 to replace the filter screen 22 or repair the internal grinding parts. Routine maintenance can be performed through the maintenance door 26 on the side of the control panel 1 to repair the internal electrical components.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may utilize the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. A method for the production of a composite anticorrosive coating, comprising a production plant, characterized in that: The production equipment includes an operating table (1), a fixed chamber (2) is installed at the upper end of the operating table (1), a feed hopper (3) is installed at the upper end of the fixed chamber (2), and a grinding cylinder (5) is installed on the side of the fixed chamber (2). The grinding cylinder (5) is equipped with a mixing and grinding unit. The paint raw material particles to be ground can be fed from the feed hopper (3) and transported into the grinding cylinder (5). The grinding part rotates inside the grinding cylinder (5) to drive the grinding sand to grind the raw material inside the grinding cylinder (5). The ground paint can be filtered through the filter unit and then discharged from the discharge pipe (6).

2. The method of claim 1, wherein: One end of the grinding cylinder (5) is detachably assembled between the assembly part (28) and the fixed chamber (2). The bottom of the feed hopper (3) is connected to the feed port (12), which extends into the grinding cylinder (5). A circulation unit is provided on the surface of the grinding cylinder (5) near both ends, wherein the circulation unit allows the grinding sand inside the grinding cylinder (5) to circulate back and forth.

3. The method of claim 2, wherein the method further comprises: The circulation unit includes an air pump (7), which is fixedly installed on the side of the operating table (1). An air supply pipe (8) is installed at the output end of the air pump (7). The port of the air supply pipe (8) is connected to one end of the grinding cylinder (5) by means of a one-way valve. The one-way valve can input high-pressure air into the grinding cylinder (5) in one direction to blow the grinding sand inside the grinding cylinder (5) with the help of high-pressure air.

4. The method of claim 2, wherein the method further comprises: The upper end of the operating table (1) is equipped with a track (9), and the bottom of the grinding cylinder (5) is equipped with a conveyor frame (10). The rollers on the conveyor frame (10) can roll along the track (9). When disassembling the grinding cylinder (5), the rollers on the conveyor frame (10) can be used to move on the track (9) to remove the grinding cylinder (5) and inspect its interior.

5. The method for preparing the composite anti-corrosion coating according to claim 1, characterized in that: The grinding section includes an assembly ring (14) detachably installed inside the grinding cylinder (5). Multiple crushing strips (15) are installed on the inner wall of the assembly ring (14). The multiple crushing strips (15) are arranged in a circumferential array on the inner wall of the assembly ring (14). The ports of the crushing strips (15) face the drive shaft (13). Multiple sets of arc-shaped mixing fan blades (16) are provided on the surface of the drive shaft (13). The rotation of the arc-shaped mixing fan blades (16) can drive the grinding sand to mix and crush the coating raw materials inside the grinding cylinder (5). An axial grinding section (17) for stirring the grinding sand is provided between adjacent sets of arc-shaped mixing fan blades (16).

6. The method for preparing the composite anti-corrosion coating according to claim 5, characterized in that: The axial grinding part (17) includes a stirring impeller, wherein an assembly shaft (18) is rotatably mounted in the middle of the stirring impeller. The assembly shaft (18) is fixedly installed inside the grinding cylinder (5). The two sides of the stirring impeller are respectively engaged with two adjacent arc-shaped mixing fan blades (16). One of the two adjacent arc-shaped mixing fan blades (16) is relatively fixed to the drive shaft (13), and the other is fixed to the drive shaft (13) by means of a bearing. When one of the arc-shaped mixing fan blades (16) rotates, it drives the stirring impeller to rotate and then uses the stirring impeller to drive the other arc-shaped mixing fan blade (16) to rotate in the opposite direction. Multiple directions of rotation can be used to drive the grinding sand to impact the grinding coating inside the grinding cylinder (5) for grinding.

7. The method for preparing the composite anti-corrosion coating according to claim 6, characterized in that: A dividing ring (19) is installed in the middle of the grinding cylinder (5). The two edges of the inner wall of the dividing ring (19) are provided with a collecting surface (20). The dividing ring (19) can be used to block the grinding sand and increase the flow path of the grinding sand.

8. The method for preparing the composite anti-corrosion coating according to claim 1, characterized in that: The filter unit includes an assembly frame (21), which is fixedly installed inside the grinding cylinder (5). The drive shaft (13) and the assembly frame (21) are rotatably installed together. A filter screen (22) is provided on the surface of the assembly frame (21), through which the ground paint powder passes through the filter screen (22) and is discharged through the discharge pipe (6).

9. The method for preparing the composite anti-corrosion coating according to claim 8, characterized in that: A spring sheet (24) is fixedly installed on the surface of the drive shaft (13). An impact ring (23) is fixedly connected to the port of the spring sheet (24). The impact ring (23) will squeeze the spring sheet (24) to bend during the process of the air pump (7) inputting high-pressure air. The spring sheet (24) can be used to shake and impact the filter screen to ensure the conductivity of the filter screen.

10. A composite anti-corrosion coating, characterized in that: The composite anti-corrosion coating preparation method according to claim 9 is adopted, wherein the coating comprises epoxy resin, organosilicon modified epoxy resin, mica iron oxide, glass flakes, precipitated barium sulfate, zinc phosphate, polyamide wax thixotropic anti-settling agent, polyacrylate wetting and dispersing agent, polyether modified siloxane defoamer, xylene as the main solvent, and n-butanol as the co-solvent, in a ratio of 26:6:20:12:13:9:1.2:0.8:0.5:5.2, with the remainder being irrelevant elements.

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