A device for preparing a coating for dehydration

Abstract

The utility model relates to the technical field of paint production equipment, and disclose a kind of paint preparation dewatering device, including reaction kettle and the end cap of fixed installation in the open end of reaction kettle, further include: fixedly connected on the water collecting plate of end cap, and water collecting plate is fixedly installed with the condenser pipe for trapping water vapor in;Rotary shaft is rotatably connected on end cap, and rotary shaft is fixedly installed with the stirring vane for stirring paint;The utility model can completely cover the top space of reaction kettle by annular water collecting plate and condenser pipe, greatly increase the contact area with water vapor, improve the trapping efficiency of water vapor, thereby improve the dehydration rate, while water collecting plate can collect the water after condensation, by the drain pipe that is communicated with water collecting plate, water is discharged to external collection equipment, effectively avoid the water vapor that is not captured in equipment interior meets cold condensation backflow, prevent the condensate water of backflow to mix into paint system again, ensure the dehydration efficiency of paint.

Description

Technical Field

[0001] This utility model relates to the field of coating production equipment technology, specifically a coating preparation dehydration device. Background Technology

[0002] Coating preparation involves processing raw materials such as resins, solvents, pigments, fillers, and additives into homogeneous liquid or powder products with specific properties (such as adhesion, hiding power, and weather resistance) through physical mixing, chemical dispersion, and reactions. The core of this process is ensuring the full dispersion and stability of each component to form a homogeneous system. This process typically involves pre-dispersion, grinding and refining, paint mixing, and filtration. The final product must meet requirements for storage stability, applicability to application, and decorative or protective functions after film formation. Precise control of the preparation process directly determines key indicators such as gloss, viscosity, and color of the coating.

[0003] Dehydration is a crucial step in paint production, primarily targeting water-based systems or raw materials with high moisture content. Residual moisture can cause multiple problems, such as disrupting emulsion stability, leading to resin precipitation or pigment flocculation. Secondly, moisture in solvent-based paints can easily cause film defects such as pinholes and fisheyes. In addition, moisture may participate in side reactions (such as isocyanate group reactions), reducing crosslinking efficiency or generating bubbles. Dehydration can improve product storage stability, prevent paint film defects caused by uneven moisture evaporation after application, and ensure that the core properties of the final coating, such as corrosion resistance and mechanical strength, meet the standards.

[0004] In existing equipment, the collection devices in some units do not completely cover the top chamber, resulting in insufficient contact with water vapor, which reduces the dehydration rate. Furthermore, uncaptured water vapor condenses and flows back into the equipment after cooling, further reducing the dehydration efficiency of the coating. On the other hand, when agitating the coating, the commonly used stirring rods often have blind spots, leading to coating accumulation and uneven mixing. This accumulation can also cause uneven color and decreased component stability due to localized overheating, reducing the precision of coating production. Therefore, we urgently need a coating preparation dehydration device to solve these problems. Utility Model Content

[0005] This utility model provides a coating preparation dehydration device. By setting up a water receiving plate and a condenser, it solves the problems of insufficient contact with water vapor, which reduces the dehydration rate and causes water vapor backflow, as mentioned in the background art. By setting up stirring blades, it solves the problems of coating accumulation, uneven coating during mixing, and local overheating caused by coating accumulation, as mentioned in the background art.

[0006] This utility model provides the following technical solution: A dehydration device for coating preparation includes a reaction vessel and an end cover fixedly installed at the opening end of the reaction vessel. It also includes: a water receiving plate fixedly connected to the end cover, and a condenser tube for capturing water vapor fixedly installed inside the water receiving plate; a rotating shaft rotatably connected to the end cover, a stirring blade for stirring the coating fixedly installed on the rotating shaft, and a spiral blade for lifting the coating fixedly connected to the middle of the rotating shaft.

[0007] As a preferred technical solution of this utility model, the stirring blade is mainly composed of a support plate, a paving plate and a lifting plate. The support plate is fixedly connected to the rotating shaft, the paving plate is fixedly connected to the lower part of the support plate, and the lifting plate is fixedly connected to the lower part of the paving plate.

[0008] As a preferred embodiment of this utility model, the included angle between the plane of the actuating piece and the plane of the supporting piece is in the range of 30°-60°.

[0009] As a preferred embodiment of this utility model, the included angle between the lifting plate and the actuating plate is in the range of 120°-150°.

[0010] As a preferred embodiment of this utility model, the end of the lifting plate extends toward the rotation axis and forms a meandering section.

[0011] As a preferred embodiment of this utility model, a drain pipe for communicating with an external collection device is fixedly installed on the end cap, and the drain pipe extends inward and connects with the water receiving plate to form a drainage channel.

[0012] As a preferred embodiment of this utility model, both the water receiving plate and the condenser tube are designed in a ring shape.

[0013] As a preferred embodiment of this utility model, a drive motor for driving the rotating shaft is fixedly connected to the end cover, and the output end of the drive motor is fixedly connected to the rotating shaft.

[0014] Compared with the prior art, the present invention provides a dehydration device for coating preparation, which has the following beneficial effects: 1. In this coating preparation dehydration device, the annular water receiving plate and condenser pipe can completely cover the top space of the reactor, greatly increasing the contact area with water vapor and improving the capture efficiency of water vapor, thereby increasing the dehydration rate. At the same time, the water receiving plate can collect the condensed water and discharge it to the external collection equipment through the drain pipe connected to the water receiving plate. This effectively avoids the uncaptured water vapor from condensing and flowing back inside the equipment, preventing the refluxed condensate from mixing back into the coating system and ensuring the dehydration efficiency of the coating.

[0015] 2. In this coating preparation and dehydration device, the support plates, agitator plates, and lifting plates in the stirring blades can generate radial and axial thrust on the coating, propelling it in different directions and expanding the stirring range. It can also effectively stir and lift the coating at the bottom and edge of the reactor, preventing the coating from accumulating in these areas and forming blind spots. Combined with the spiral blades, the coating at the bottom is lifted upwards, further promoting the circulation and mixing of the coating, making the coating more uniform, preventing local overheating that could lead to uneven color and decreased component stability, and improving the production precision of the coating.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention effectively avoids the condensation and backflow of uncaptured water vapor inside the equipment, preventing the backflowed condensate from re-mixing into the coating system, ensuring the dehydration efficiency of the coating, and through the setting of the stirring blades, making the coating mix more uniform, preventing local overheating that leads to uneven color and decreased component stability of the coating, and improving the production precision of the coating. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a half-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of a partial structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of a partial structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of a partial structure of the present invention. Figure 3 .

[0019] In the diagram: 1. Reactor; 2. End cap; 3. Water receiving plate; 4. Condenser; 5. Rotating shaft; 6. Stirring blade; 7. Spiral blade; 8. Support plate; 9. Actuating plate; 10. Lifting plate; 11. Drain pipe; 12. Drive motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] Reference Figures 1-5 A dehydration device for coating preparation includes a reaction vessel 1 and an end cover 2 fixedly installed at the opening end of the reaction vessel 1. Here, a connecting pipe for connecting to a vacuum pump is installed on the end cover 2, and a feed valve is fixedly connected to the end cover 2. A discharge valve is fixedly connected to the lower part of the reaction vessel 1. The end of the discharge valve extends upward and communicates with the discharge end of the reaction vessel 1. A heater for heating is also fixedly installed at the bottom of the reaction vessel 1.

[0022] It should be noted that the connecting pipe is used to connect the vacuum pump and the reaction vessel 1. The vacuum pump can create a vacuum environment inside the reaction vessel 1, which lowers the boiling point of water, accelerates the evaporation rate of water in the coating, and improves the dehydration efficiency.

[0023] Furthermore, the outer shell of reactor 1 is made of stainless steel, mainly to ensure that heat can be efficiently transferred from the heater to the coating inside reactor 1. Stainless steel has good thermal conductivity, which can quickly and evenly transfer external heat to the internal coating, allowing the coating to quickly reach the temperature required for the reaction. At the same time, stainless steel has good corrosion resistance and mechanical strength, which can adapt to the chemical corrosion and high temperature and high pressure environment that may exist in the coating preparation process, ensuring the service life and safety of reactor 1.

[0024] It also includes a water receiving plate 3 fixedly connected to the end cap 2, and a condenser tube 4 for capturing water vapor is fixedly installed inside the water receiving plate 3. Both the water receiving plate 3 and the condenser tube 4 are annular designs. A drain pipe 11 for communicating with external collection equipment is fixedly installed on the end cap 2, and the drain pipe 11 extends inward and communicates with the water receiving plate 3 to form a drainage channel.

[0025] Here, the annular condenser 4 needs to be paired with an external cooler and a water circulation system. The external cooler provides cooling capacity to the annular condenser 4, keeping it at a low temperature so that water vapor can be condensed into liquid water. The water circulation system is used to circulate and cool the coolant in the annular condenser 4 after it has absorbed heat, so that it can be reused and the condensation process can continue. In addition, a temperature control system is also required to adjust the output cooling capacity of the cooler and precisely control the temperature of the annular condenser 4 according to the humidity and temperature conditions in the reactor 1 to ensure that the condensation efficiency is at its best. It should be noted that the external cooler and water circulation system described above are not shown in the diagram.

[0026] Furthermore, the annular water receiving plate 3 can collect the condensed water, preventing water from dripping randomly and causing equipment contamination or affecting the quality of the coating. The annular condenser pipe 4 has an annular structure, which can completely cover the relevant area, greatly increasing the contact area with water vapor and effectively improving the condensation efficiency. At the same time, the annular water receiving plate 3 discharges water to the collection point connected to it through the drain pipe 11, avoiding water flowing back into the reactor 1 and ensuring the continuity and stability of the dehydration process.

[0027] A rotating shaft 5 is rotatably connected to the end cover 2. A drive motor 12 for driving the rotating shaft 5 is fixedly connected to the end cover 2, and the output end of the drive motor 12 is fixedly connected to the rotating shaft 5. A stirring blade 6 for stirring the coating is fixedly installed on the rotating shaft 5, and a spiral blade 7 for lifting the coating is fixedly connected to the middle of the rotating shaft 5. Here, as the rotating shaft 5 rotates, the spiral blades 7 continuously lift the coating material at the bottom of the reactor 1, forming a stable upward flow of the coating material. This lifting effect is effective in breaking the layering phenomenon of the coating material, allowing coating materials at different depths to be fully mixed, and preventing the lower coating material from precipitating or overheating due to prolonged residence. During the lifting process, the spiral blades 7 increase the contact area between the coating material and the air inside the reactor 1. After the coating material is lifted to a certain height, it will fall downwards due to gravity. During this process, the moisture in the coating material is more likely to evaporate and form water vapor, which is easily captured by the condenser 4 above and collected by the water receiving plate 3, preventing water vapor backflow and thus improving the dehydration efficiency.

[0028] Furthermore, the spiral blade 7 also enables it to adapt well to coatings of different viscosities. For coatings with higher viscosity, the continuous spiral surface of the spiral blade 7 can generate continuous thrust to ensure that the coating can be lifted smoothly. For thinner coatings, it can also achieve uniform delivery through stable rotation, ensuring the circulation of coatings in the entire reactor 1.

[0029] The stirring blade 6 is mainly composed of a support plate 8, a tug plate 9, and a lifting plate 10. The support plate 8 is fixedly connected to the rotating shaft 5, the tug plate 9 is fixedly connected to the lower part of the support plate 8, and the lifting plate 10 is fixedly connected to the lower part of the tug plate 9. The included angle between the plane where the tug plate 9 and the support plate 8 are located is in the range of 30°-60°, and the included angle between the lifting plate 10 and the tug plate 9 is in the range of 120°-150°. The end of the lifting plate 10 extends towards the rotating shaft 5 and forms a meandering part.

[0030] Here, the support plate 8 provides a stable mounting base for the agitator plate 9 and the lifting plate 10, ensuring the stability and rigidity of the entire stirring blade 6 during high-speed rotation and preventing the stirring effect from being affected by loose or deformed parts.

[0031] Here, the preferred included angle of the agitator 9 is 45°. At this angle, the agitator 9 can generate a combined radial and axial thrust on the coating as it rotates with the rotating shaft 5. The radial thrust can push the coating towards the edge of the reactor 1, expanding the distribution range of the coating. Some of the coating will also be pushed towards the spiral blade 7 by the surface of the agitator 9, and mixed with the coating pushed up by the spiral blade 7, thereby promoting the mixing of coatings at different depths. This combined thrust effectively breaks the laminar flow state of the coating, enhances the turbulence of the coating, and improves the uniformity of stirring.

[0032] Furthermore, the agitator 9 can also fully agitate the coating in the middle area of ​​the reactor 1, preventing the coating from accumulating in that area.

[0033] Here, the preferred included angle of the lifting plate 10 is 135°. This included angle allows the lifting plate 10 to penetrate deep into the bottom area of ​​the reactor 1 and effectively agitate the coating at the bottom. This angle ensures that the lifting plate 10 can fully contact the coating at the bottom, while preventing the lifting plate 10 from colliding or rubbing against the bottom of the reactor 1 due to the angle being too small. At the same time, it can also generate sufficient upward lifting force to push the coating at the bottom upward and participate in the entire coating circulation and mixing process.

[0034] Furthermore, after the main body of the lifting plate 10 extends to the vicinity of the edge of the reactor 1 in a certain direction, it bends at the end towards the direction of the rotating shaft 5 to form a hook-like structure. The detour part can directly move and clean the paint accumulated in these positions, bringing it from the edge corners to the main stirring area of ​​the reactor 1 to participate in the overall paint circulation. This solves the problem of paint accumulation caused by the inability of traditional stirring structures to reach the edge corners, ensuring a comprehensive improvement in paint stirring within the entire reactor 1.

[0035] Furthermore, the agitator 9 moves the coating in the middle towards the edges and downwards, while the lifting plate 10 lifts the coating at the bottom and edges upwards. Combined with the lifting effect of the spiral blade 7 in the middle of the rotating shaft 5, the coating in the entire reactor 1 can form an efficient circulation flow, further improving the uniformity of coating mixing and dehydration efficiency.

[0036] In this invention, firstly, coating raw materials are added to the reactor 1 through the feed valve on the end cap 2. The reactor 1 is then evacuated by an externally connected vacuum pump. The heater is then started to heat the reactor 1. At this time, the drive motor 12 is started, and its output end drives the rotating shaft 5 to rotate. This causes the stirring blades 6 and the spiral blades 7 on the rotating shaft 5 to rotate synchronously. During the rotation, the agitator 9 generates radial and axial thrust on the coating, pushing the coating in different directions to expand the stirring range and allow the coating to be initially mixed. The lifting plate 10 effectively stirs and lifts the coating at the bottom and edges to prevent coating accumulation and the formation of blind spots. At the same time, in conjunction with the action of the agitator 9, the coating forms a local circulation in the reactor 1. Combined with the spiral blades 7, this promotes the circulation and mixing of the coating, allowing the coating in different areas to fully contact and mix evenly, preventing local overheating. During the mixing process of the coating, the water in the coating evaporates due to heat to form water vapor. As the water vapor rises, it comes into contact with the condenser 4 and condenses into water droplets, which fall onto the water collection plate 3. The condensate collected by the water collection plate 3 is discharged to the external collection equipment through the drain pipe 11 connected to it, so as to prevent the condensate from flowing back into the coating. When the coating reaches the required degree of dehydration and mixing effect, the discharge valve at the bottom of the reactor 1 is opened, and the dehydrated coating is discharged through the discharge valve.

[0037] Components not described in detail in this article are existing technologies.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dehydration apparatus for coating preparation, comprising a reaction vessel (1) and an end cap (2) fixedly installed at the open end of the reaction vessel (1), characterized in that, Also includes: A water receiving plate (3) is fixedly connected to the end cap (2), and a condenser tube (4) for capturing water vapor is fixedly installed inside the water receiving plate (3). A rotating shaft (5) is rotatably connected to the end cap (2), and a stirring blade (6) for stirring the coating is fixedly installed on the rotating shaft (5). A spiral blade (7) for lifting the coating is fixedly connected to the middle of the rotating shaft (5).

2. The coating preparation dehydration device according to claim 1, characterized in that, The stirring blade (6) is mainly composed of a support plate (8), a swivel plate (9) and a lifting plate (10). The support plate (8) is fixedly connected to the rotating shaft (5), the swivel plate (9) is fixedly connected to the lower part of the support plate (8), and the lifting plate (10) is fixedly connected to the lower part of the swivel plate (9).

3. The coating preparation dehydration device according to claim 2, characterized in that, The angle between the plane containing the actuating piece (9) and the supporting piece (8) is in the range of 30°-60°.

4. The coating preparation dehydration device according to claim 2, characterized in that, The included angle between the lifting plate (10) and the actuating plate (9) is 120°-150°.

5. The coating preparation dehydration device according to claim 4, characterized in that, The end of the lifting plate (10) extends toward the rotation axis (5) and forms a meandering section.

6. The coating preparation dehydration apparatus according to claim 1, characterized in that, The end cap (2) is fixedly installed with a drain pipe (11) for communicating with an external collection device, and the drain pipe (11) extends inward and is connected to the water receiving plate (3) to form a drainage channel.

7. The coating preparation dehydration apparatus according to claim 1, characterized in that, Both the water receiving plate (3) and the condenser tube (4) are ring-shaped.

8. The coating preparation dehydration apparatus according to claim 1, characterized in that, The end cap (2) is fixedly connected to a drive motor (12) for driving the rotating shaft (5), and the output end of the drive motor (12) is fixedly connected to the rotating shaft (5).

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