A reaction kettle for paint production

Abstract

The utility model provides a kind of reaction kettle for paint production, including heating reaction kettle, heating reaction kettle includes the heating tank of outside and the reaction tank of inner layer, high-efficiency stirring assembly is rotationally arranged in reaction tank, high-efficiency stirring assembly includes the stirring rod rotationally arranged in reaction tank, at least two groups of stirring vane are arranged on the outside wall of stirring rod, two groups of stirring vane are arranged on the outside wall of stirring rod with interval, first spiral conveying blade is arranged on the stirring rod below the lower part of stirring vane, second spiral conveying blade is arranged between two groups of stirring vane.The utility model can realize the high-efficiency stirring of material in reaction tank by the cooperation of stirring vane outside stirring rod, first spiral conveying blade and second spiral conveying blade, realize the high-efficiency upward guiding conveying operation of material below reaction tank, cooperate stirring vane to realize the fully efficient complete uniform stirring operation of material.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel equipment technology, specifically to a reaction vessel for coating production. Background Technology

[0002] The core process in paint production involves uniformly mixing, dispersing, and chemically reacting multiple components such as resins, pigments, solvents, and additives at a specific temperature. The uniformity of mixing and the stability of the reaction temperature directly determine the key properties of the paint, such as color consistency, adhesion, and corrosion resistance. As the paint industry develops towards high performance and environmental friendliness, the requirements for the stirring efficiency, material adaptability, energy conservation, and environmental protection of the reaction vessel are increasing.

[0003] However, existing reaction vessels used in paint production still suffer from poor mixing and severe material stratification. This is because the density of pigments and fillers in paint materials is usually higher than that of resins and solvents, making them prone to sedimentation at the bottom of the reaction vessel. Traditional reaction vessels often use a single type of agitator blade, which has a limited mixing range, insufficient radial mixing intensity, and poor axial material circulation. As a result, the sediment at the bottom is difficult to mix thoroughly, leading to a stratification phenomenon of "uniform upper layer and sedimented lower layer." This requires manual stopping of the machine for mixing or extending the mixing time, which not only affects production efficiency but also results in uneven color and performance fluctuations in paint products. Utility Model Content

[0004] In view of this, the present invention provides a reaction vessel for coating production, which can achieve efficient and thorough mixing of materials in the reaction vessel through a high-efficiency stirring component. This solves the problems of traditional reaction vessels, which mostly use a single type of stirring blade, resulting in limited stirring range, insufficient radial stirring intensity, and poor axial material circulation. As a result, the bottom sediment is difficult to be fully stirred, leading to a stratification phenomenon of "uniform upper layer and sedimented lower layer". This requires manual stopping of stirring or extension of stirring time, which not only affects production efficiency but also causes uneven color and performance fluctuations in coating products.

[0005] To solve the above-mentioned technical problems, this utility model provides a reaction vessel for paint production, including a heated reaction vessel. The heated reaction vessel includes an outer heating tank and an inner reaction tank. A high-efficiency stirring assembly is rotatably arranged inside the reaction tank. The high-efficiency stirring assembly includes a stirring rod rotatably arranged inside the reaction tank. At least two sets of stirring blades are arranged on the outer wall of the stirring rod, with the two sets of stirring blades spaced vertically on the outer wall of the stirring rod. A first spiral conveying blade is arranged on the stirring rod below the lower stirring blade, and a second spiral conveying blade is arranged between the two sets of stirring blades. This utility model can achieve efficient stirring of the material in the reaction tank by using the stirring blades on the outer side of the stirring rod in conjunction with the first and second spiral conveying blades, while simultaneously achieving efficient upward guiding and conveying of the material below the reaction tank. Combined with the stirring blades, it achieves thorough, efficient, and completely uniform stirring of the material, solving the problem that traditional stirring blades cannot adequately stir materials far from the stirring blades or those deposited at the bottom of the reaction tank, easily resulting in insufficient stirring, severe stratification of the mixture, and affecting its performance.

[0006] The reaction tank includes an upper reaction zone and a lower discharge zone. The discharge zone has a structure that is larger at the top and smaller at the bottom. The first spiral conveyor blade is located in the discharge zone, and the outer diameter of the blades increases sequentially in the upward spiral direction. This facilitates the efficient and thorough upward conveying of materials in the discharge zone, which, together with the lower stirring blades, enables efficient stirring and mixing.

[0007] A mounting bracket is also provided on the outside of the stirring rod, and a scraper that abuts against the inner wall of the reaction vessel is provided on the outside of the mounting bracket. This utility model can achieve efficient and thorough scraping and cleaning of the material adhering to the inner wall of the reaction vessel by rotating the stirring rod, which in turn rotates the mounting bracket and the scraper on the outside of the mounting bracket. This further improves the mixing efficiency of the material and avoids unnecessary waste of the material adhering to the inner wall of the reaction vessel.

[0008] The upper part of the scraper abuts against the inner wall of the reaction zone, and the lower part of the scraper abuts against the inner wall of the discharge zone. This facilitates efficient and rapid scraping and cleaning of materials adhering to the entire inner wall of the reaction tank.

[0009] There are three scrapers, which are evenly distributed on the outside of the stirring rod.

[0010] The upper part of the reactor is equipped with a drive unit. The output shaft of the drive unit is connected to the stirring rod. The upper part of the stirring rod penetrates the side wall of the reactor, and a sealed bearing is installed at the connection point with the side wall of the reactor. The rotation of the output shaft of the drive unit can drive the stirring rod and the stirring blades on the outside of the stirring rod to perform efficient rotation, thereby achieving efficient mixing of materials.

[0011] The heating reactor has a feed inlet at the top and a discharge outlet at the bottom, with a discharge valve inside the discharge outlet.

[0012] The driving component is a servo motor.

[0013] The heating tank is connected to an external electric heater, and a thermometer is also installed on the heating tank.

[0014] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. Significantly Improved Material Mixing Uniformity and Reaction Efficiency: Through the synergistic design of paddle-type + anchor-type combined stirring blades and upper and lower double-helix conveying blades, the first helix conveying blade transports the material deposited at the bottom of the discharge zone upwards, while the second helix conveying blade guides the upper material downwards, forming a closed-loop material circulation. Combined with the radial stirring of the stirring blades, the material achieves three-dimensional mixing within the reaction vessel, completely solving the problems of dead zones and material stratification in traditional reaction kettles. Compared to existing equipment, the material mixing uniformity is greatly improved, the pigment dispersion particle size is more uniform, and the color consistency of the coating is significantly improved. At the same time, the mixing efficiency is greatly improved, the single-batch reaction time is greatly shortened, and production efficiency is significantly increased.

[0015] 2. Significantly improved material utilization and reduced waste: This utility model uses evenly distributed scrapers to fully cover the inner wall of the reaction vessel (including the conical discharge area). When the stirring rod rotates, the scrapers simultaneously scrape off the coating material adhering to the wall, avoiding waste caused by high-viscosity materials sticking to the wall and coking, thus greatly improving material utilization. In addition, the scraper material has excellent non-stick and corrosion resistance, and will not react chemically with the coating components, ensuring product purity. At the same time, the detachable design facilitates maintenance and replacement, further reducing the cost of use.

[0016] 3. Uniform and stable heating ensures coating performance: The modified heating reactor in this invention adopts a water bath heating method. The heating medium inside the reactor is heated by an electric heater and then naturally convections. Combined with continuous stirring by a high-efficiency stirring component, this ensures uniform heating of the materials inside the reactor, completely solving the problems of material oxidation and performance degradation caused by localized overheating in traditional equipment. A thermometer monitors the heating temperature in real time, and combined with the precise speed control of a servo motor, the temperature and stirring intensity can be flexibly adjusted according to the reaction process requirements of different coatings, ensuring a stable and controllable reaction process and improving batch consistency of coating products.

[0017] 4. Smooth and thorough discharge, reducing the risk of cross-contamination: This utility model adapts the conical discharge area at the bottom of the reaction tank to the first spiral conveying blade with a gradually increasing outer diameter. During discharge, the spiral blade can force the material in the discharge area upward and discharge it from the discharge port. Compared with the traditional straight cylindrical bottom structure, the amount of residual material is reduced by more than 80%, which not only reduces material waste, but also avoids cross-contamination of the residual material to the next production. The discharge valve is made of stainless steel ball valve with high sealing performance, which is convenient to open and close and has reliable sealing, further ensuring the smoothness and sealing of the discharge process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the reaction vessel for coating production according to this utility model; Figure 2 This is a front view of the reaction vessel for coating production according to this utility model; Figure 3 This utility model Figure 2 Sectional view at point AA; Figure 4 This utility model Figure 3 Enlarged view of section B in the middle.

[0019] Explanation of reference numerals in the attached drawings: 100, heated reaction vessel; 110, heated tank; 120, reaction tank; 121, reaction zone; 122, discharge zone; 130, feed inlet; 140, discharge outlet; 200, high-efficiency stirring assembly; 210, stirring rod; 220, stirring blade; 230, first spiral conveyor blade; 240, second spiral conveyor blade; 300, mounting bracket; 400, scraper; 500, drive component; 600, discharge valve; 700, thermometer. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0021] like Figure 1-4As shown: This embodiment provides a reaction vessel for paint production, including a heating reaction vessel 100. The heating reaction vessel 100 includes an outer heating tank 110 and an inner reaction tank 120, which are coaxially arranged and fixedly connected by a stainless steel bracket made of 316L stainless steel. The bracket is fastened to the inner wall of the heating tank 110 and the outer wall of the reaction tank 120 by bolts to ensure the relative position stability of the two tanks. The heating tank 110 is made of Q235 carbon steel, and its inner wall is sprayed with an epoxy resin anti-rust coating to prevent corrosion by the heating medium. The inner cavity of the tank is used to contain the heating medium (clean water) to achieve water bath heating of the reaction tank 120. Compared with direct heating, the temperature rise is more stable and the temperature control is more precise. The reaction vessel 120 is made of 316L stainless steel, manufactured through stamping and welding processes. It possesses excellent corrosion resistance and structural rigidity, resisting the erosion of solvents, acidic additives, and other substances encountered in paint production. The vessel's interior is divided into an upper reaction zone 121 and a lower discharge zone 122. The discharge zone 122 has a conical structure, wider at the top and narrower at the bottom, facilitating material flow to the discharge port 140 and reducing residue. The heating vessel 110 is connected to an external electric heater via a flange interface. The electric heater uses FY-100-3 type stainless steel electric heating tubes manufactured by Yancheng Feiyu Electric Heating Technology Co., Ltd., with a single tube rated power of 3kW. It features a U-shaped structure design, providing a large heating area and high thermal efficiency. Fixed to the bottom of the heating vessel 110 via a flange, the heating medium undergoes natural convection after heating, ensuring uniform heating. A thermometer 700 is installed on the top of the heating tank 110. This is a WZP-230 platinum resistance thermometer 700 manufactured by Shanghai Instrument & Meter Co., Ltd., with a measuring range of -20℃ to 200℃. The probe is inserted into the heating medium inside the heating tank 110 to monitor the heating temperature in real time, facilitating precise control by the operator. A high-efficiency stirring assembly 200 is rotatably installed inside the reaction tank 120. The high-efficiency stirring assembly 200 includes a stirring rod 210 rotatably installed inside the reaction tank 120. At least two sets of stirring blades 220 are installed on the outer wall of the stirring rod 210, spaced vertically. A first spiral conveying blade 230 is installed on the stirring rod 210 below the lower stirring blade 220, and a second spiral conveying blade 240 is installed between the two sets of stirring blades 220. The stirring rod 210 is made of 45 carbon steel and undergoes quenching and tempering treatment (quenching + high temperature tempering) to enhance its hardness and wear resistance. The surface is plated with hard chrome to improve corrosion resistance, ensuring that it is not easily deformed or damaged when stirring high-viscosity materials.At least two sets of stirring blades 220 are arranged at intervals on the outer wall of the stirring rod 210. The upper stirring blade 220 adopts a paddle-type structure with blades at a 30° tilt angle and is made of 316L stainless steel. It is fixed to the stirring rod 210 by welding. When rotating, it generates radial liquid flow to achieve lateral mixing of materials. The lower stirring blade 220 adopts an anchor-type structure with blade curvature adapted to the inner wall of the reaction vessel 120. It is also made of 316L stainless steel and is welded to the lower part of the stirring rod 210. It can strongly stir the materials near the tank wall and bottom to prevent sedimentation. The first spiral conveyor blade 230, located in the discharge zone 122 below the lower stirring blade 220, is made of 316L stainless steel and is fixed to the stirring rod 210 by a segmented welding process. Its rotation direction is upward spiral, and the outer diameter of the blades increases sequentially from bottom to top, adapting to the structure of the conical discharge zone 122. When rotating, it generates a strong axial thrust, efficiently conveying the material deposited at the bottom of the discharge zone 122 upward to the reaction zone 121, achieving thorough mixing in conjunction with the lower anchor-type stirring blade 220. The second spiral conveyor blade 240, also made of 316L stainless steel, is positioned between the two sets of stirring blades 220 and rotates downward spirally. It forms a material circulation channel with the first spiral conveyor blade 230, conveying the material stirred by the upper stirring blade 220 downward, creating convection collisions with the material conveyed by the first spiral conveyor blade 230, further improving the mixing uniformity. This invention utilizes the stirring blades 220 on the outer side of the stirring rod 210, in conjunction with the first spiral conveying blades 230 and the second spiral conveying blades 240, to achieve efficient stirring of materials within the reaction tank 120, while simultaneously providing efficient upward guidance and conveying of materials below the reaction tank 120. The stirring blades 220 work together to achieve thorough, efficient, and completely uniform stirring of the materials, solving the problem that traditional stirring blades 220 cannot adequately stir materials far from the stirring blades 220 or those deposited at the bottom of the reaction tank 120, leading to insufficient stirring, severe stratification of the mixture, and affecting its performance.

[0022] According to one embodiment of the present invention, such as Figure 1-4 As shown, the reaction tank 120 includes an upper reaction zone 121 and a lower discharge zone 122. The discharge zone 122 has a structure that is larger at the top and smaller at the bottom. The first spiral conveying blade 230 is located in the discharge zone 122, and the outer diameter of the blades in the upward spiral direction increases sequentially. This facilitates the efficient and sufficient upward conveying of the material in the discharge zone 122, and works in conjunction with the lower stirring blade 220 to achieve efficient stirring and mixing.

[0023] According to another embodiment of the present invention, such as Figure 1 and Figure 2As shown, a mounting bracket 300 is also provided on the outer side of the stirring rod 210. A scraper 400 that abuts against the inner wall of the reaction vessel 120 is provided on the outer side of the mounting bracket 300. The mounting bracket 300 is welded to the outer side of the stirring rod 210. The mounting bracket 300 is made of 316L stainless steel and has a triangular support structure with three support arms evenly distributed (with an included angle of 120°). The scraper 400 is fixed to the outer side of each support arm by bolts. The scraper 400 is made of polytetrafluoroethylene (PTFE+15% glass fiber) filled material and is manufactured by compression molding process. It has excellent wear resistance, corrosion resistance and flexibility, low coefficient of friction and does not damage the inner wall of the reaction vessel 120. Its upper part abuts against the inner wall of the reaction zone 121 and its lower part abuts against the inner wall of the discharge zone 122, which can achieve full coverage scraping of the entire inner wall of the reaction vessel 120. The connection between the scraper 400 and the mounting frame 300 adopts a detachable structure, which facilitates the replacement of the scraper 400 after wear and extends the service life of the equipment. This invention utilizes the rotation of the stirring rod 210 to simultaneously rotate the mounting frame 300 and the scraper 400 on its outer side, achieving efficient and thorough scraping and cleaning of materials adhering to the inner wall of the reaction tank 120. This further improves the mixing efficiency of the materials and avoids unnecessary waste of materials adhering to the inner wall of the reaction tank 120.

[0024] According to another embodiment of the present invention, such as Figure 1 and Figure 4 As shown, the upper part of the scraper 400 abuts against the inner wall of the reaction zone 121, and the lower part of the scraper 400 abuts against the inner wall of the discharge zone 122. This facilitates efficient and rapid scraping and cleaning of materials adhering to the entire inner wall of the reaction tank 120.

[0025] There are three scrapers 400, which are evenly distributed on the outside of the stirring rod 210.

[0026] According to another embodiment of the present invention, such as Figure 1 and Figure 3As shown, a drive unit 500 is installed at the top of the reactor. Drive unit 500 is a servo motor, fixedly mounted on the top of the frame. It is an IndraDyn S-series servo motor manufactured by Bosch Rexroth Group, model MSK050C-0450-NN-M2-UP1. This motor is a synchronous servo motor with a rated voltage of three-phase AC 400V, a rated power of 4kW, and a rated speed of 450rpm. Equipped with a 23-bit multi-turn encoder, it offers high resolution and fast response, enabling precise adjustment of the stirring speed (steplessly adjustable from 50-450rpm), suitable for harsh industrial production conditions. The output shaft of drive unit 500 is connected to the upper end of the stirring rod 210 via a flexible coupling. The flexible coupling is an LK2-20-25 aluminum alloy coupling, whose rubber elastic element buffers vibrations during motor operation, compensates for installation deviations, ensures smooth transmission, and requires no additional lubrication, simplifying maintenance. The output shaft of the drive unit 500 is connected to the stirring rod 210. The upper part of the stirring rod 210 penetrates the side wall of the reaction tank 120, and a sealed bearing is installed at the connection point with the side wall of the reaction tank 120. The upper part of the stirring rod 210 penetrates the top side wall of the reaction tank 120, and a sealed bearing assembly is installed at the penetration point. The sealed bearing is a 6212 model deep groove ball bearing, equipped with a dual structure of skeleton oil seal and packing seal. The bearing seat is made of 316L stainless steel and is fixed to the top flange of the reaction tank 120 by bolts. This ensures the flexible rotation of the stirring rod 210 and effectively prevents material leakage and the entry of external air and impurities into the reaction tank 120, while also preventing lubricating oil from contaminating the material and ensuring the purity of the coating production. The rotation of the output shaft of the drive unit 500 can drive the stirring rod 210 and the stirring blades 220 on the outside of the stirring rod 210 to perform efficient rotation operations, achieving efficient mixing of materials.

[0027] The heating reactor 100 has an inlet 130 at the top and a outlet 140 at the bottom. An outlet valve 600 is installed inside the outlet 140. The inlet 130 is located on the upper side wall of the reactor 120 and is made of 316L stainless steel. It has a flange connection structure, a flange cover, and a sealing gasket for easy material feeding and sealing during the reaction process. The outlet 140 is located at the lower end of the outlet area 122 at the bottom of the reactor 120 and is also made of 316L stainless steel. An outlet valve 600 is installed inside the outlet 140. A Q41F-16P stainless steel ball valve manufactured by Shanghai Liangong Valve Factory is selected, offering excellent sealing performance, corrosion resistance, and convenient operation, enabling rapid material discharge and reducing residue.

[0028] Working principle and usage of this utility model: First, it needs to be clarified that the reaction vessel involved in this utility model is mainly used for mixing and stirring various materials. This utility model takes the stirring of coatings in the production process as an example to explain its working principle and usage method in detail. The working principle is as follows: The reaction vessel for coating production of this utility model achieves efficient mixing and reaction of coating materials through a synergistic mechanism of "water bath heating + three-dimensional circulation stirring + full-process wall scraping". Its core working process is as follows: First, the operator selects appropriate stirring speed and heating temperature parameters according to the formula and process requirements of the coating to be produced, and checks whether the connections of each component of the equipment are firm and the seals are reliable, ensuring that the scraper 400 fits tightly against the inner wall of the reaction tank 120. The inlet flange cover 130 at the top of the reaction tank 120 is opened, and the resin, pigment, solvent, additives, and other raw materials are added into the reaction tank 120 in the correct proportions. After the materials are added, the flange cover is closed and tightened to seal.

[0029] Water is injected into the heating tank 110 as the heating medium. The power supply to the electric heater and thermometer 700 is turned on, and the target heating temperature is set. After the electric heater is started, it heats the heating medium. The thermometer 700 monitors the heating temperature in real time and provides feedback to the operator. The temperature of the heating medium is stabilized within the set range by adjusting the power of the electric heater. The heating medium transfers heat to the outer wall of the reaction tank 120 through natural convection, thereby achieving indirect water bath heating of the materials inside the tank.

[0030] The servo motor is started, and the motor output shaft drives the stirring rod 210 to rotate smoothly through the flexible coupling. The stirring rod 210 drives the stirring blade 220, the spiral conveying blade, and the scraper 400 to rotate synchronously. The upper paddle-type stirring blade 220 rotates to generate radial liquid flow, which mixes the material in the upper part of the reaction zone 121 laterally. The lower anchor-type stirring blade 220 is close to the tank wall and bottom, which strongly stirs the surrounding material. The first spiral conveying blade 230 (rotating upward) rotates in the conical discharge zone 122, pushing the material deposited at the bottom upward to the reaction zone 121, where it collides and mixes with the material flow generated by the lower stirring blade 220. The second spiral conveying blade 240 (rotating downward) guides the material after it is stirred downward, forming a convection circulation with the material pushed by the first spiral conveying blade 230, so that the material can achieve three-dimensional mixing in all directions in the reaction tank 120.

[0031] During stirring, three evenly distributed PTFE-filled scrapers 400 rotate synchronously with the stirring rod 210. The scrapers 400 are in close contact with the inner wall of the reaction vessel 120, continuously scraping off the material adhering to the wall. The scraped material re-enters the stirring area to participate in the mixing reaction, avoiding material waste due to wall adhesion and coking / deterioration. The sealed bearing assembly ensures the sealing of the stirring rod 210 during rotation, preventing material leakage and the entry of external impurities, and ensuring the cleanliness of the reaction environment.

[0032] Once the material has reacted for the preset time at the set temperature and stirring intensity, and the material is confirmed to be uniformly mixed and to have reached the required viscosity and dispersion effect of the coating through the observation window, the electric heater and servo motor are turned off. After the stirring rod 210 has completely stopped rotating, the stainless steel ball valve of the discharge port 140 is slowly opened. The coating material is discharged from the discharge port 140 under the action of gravity. The synergistic effect of the conical discharge zone 122 and the first spiral conveying blade 230 ensures smooth material discharge and minimal residue.

[0033] After the material is discharged, close the discharge valve 600, open the flange cover of the inlet 130, inject cleaning solvent into the reaction tank 120, start the servo motor to run at low speed, and clean the inner wall of the tank and the stirring components by rotating the stirring blades 220 and the scraper 400. After cleaning, open the discharge valve 600 to discharge the cleaning waste liquid and complete a single production operation.

[0034] The usage method is as follows: Equipment Preparation and Inspection: Before use, check whether the frame is placed stably and whether the anti-slip and shock-absorbing pads are intact; check whether the heating medium (clean water) level in the heating tank 110 meets the requirements, and replenish it in time if it is insufficient; check whether the reaction tank 120, stirring components, scraper 400, inlet and outlet ports are clean and free of residue, and whether the scraper 400 fits tightly against the tank wall. If the scraper 400 is severely worn, it needs to be replaced in time; check whether the wiring of the servo motor, electric heater, thermometer 700, discharge valve 600 and other components is correct and the connection is firm, and whether the sealed bearings are well lubricated; start the servo motor and run it idle for 3-5 minutes to observe whether the equipment runs smoothly and whether there is any abnormal noise or vibration. After confirming that there is no fault, stop the machine for standby.

[0035] Feeding Operation: According to the coating formula ratio, prepare raw materials such as resin, pigment, solvent, and additives and pre-treat them (such as pigment grinding and solvent dilution); open the inlet flange cover 130 on the top of the reaction tank 120, and slowly feed the pre-treated raw materials into the reaction tank 120 in sequence, avoiding raw materials splashing to the outside of the tank wall; during the feeding process, the amount of raw materials fed can be observed through the inlet 130 to ensure that it meets the production formula requirements; after the feeding is completed, reset the flange cover and tighten the bolts to ensure that the inlet 130 is reliably sealed and prevent solvent evaporation or material splashing during the reaction.

[0036] Heating and stirring parameter settings: Connect the power supply to the electric heater and thermometer 700, set the target heating temperature according to the coating reaction process requirements (e.g., resin polymerization reaction temperature 80-120℃), start the electric heater to start heating, monitor the temperature of the heating medium in real time through thermometer 700, and maintain a constant temperature after the temperature rises to the set value; start the servo motor control system, adjust the stirring speed according to the material viscosity, and avoid high speed causing material foaming or equipment overload.

[0037] Reaction process monitoring: During heating and stirring, operators need to regularly observe the heating temperature displayed on thermometer 700 to ensure that the temperature is stable within the set range. If the temperature deviates, the power of the electric heater should be adjusted in time. The mixing state of the materials should be observed through the observation window of reaction vessel 120 to check for stratification, sedimentation, or severe wall adhesion. If any abnormalities are found, the stirring speed can be adjusted appropriately. The reaction time should be recorded to ensure that the reaction time of the materials in the vessel meets the process requirements and to avoid insufficient or excessive reaction.

[0038] Discharge Operation: After the material has reacted for the preset time and the material is confirmed to be evenly mixed and the viscosity meets the standard through the observation window, turn off the electric heater and servo motor, and wait for the stirring rod 210 to completely stop rotating (about 3-5 minutes); slowly open the stainless steel ball valve of the discharge port 140 to control the discharge speed and avoid splashing or blockage caused by excessive material flow rate; during the discharge process, the material status can be observed through the discharge port 140. If undispersed particles are found in the material, the discharge valve 600 can be closed, the servo motor can be restarted to stir for 5-10 minutes, and then the material can be discharged; after the discharge is completed, the discharge valve 600 can be closed, and the discharged coating product can be collected for subsequent testing and packaging.

[0039] Equipment Cleaning and Maintenance: After discharge, open the inlet flange cover 130 and inject an appropriate amount of cleaning solvent (such as ethanol or ethyl acetate, depending on the type of coating) into the reaction tank 120. The amount injected should be enough to cover the stirring blade 220 and scraper 400. Start the servo motor and run it for 5-10 minutes to thoroughly clean the inner wall of the tank and the stirring components through the rotation of the stirring blade 220 and scraper 400. After cleaning, turn off the servo motor and open the discharge valve 600 to discharge the cleaning waste liquid. If necessary, repeat the cleaning 1-2 times to ensure that there are no residues inside the equipment. After cleaning, close the discharge valve 600, open the inlet flange cover 130, and allow the inside of the reaction tank 120 to air dry naturally. Apply grease to the transmission components such as the servo motor, coupling, and sealed bearings for maintenance. Check the wear of vulnerable parts such as the scraper 400 and stirring blade 220, and replace damaged parts in time. Finally, store the equipment in a dry and ventilated environment to avoid corrosion of the parts due to a humid environment.

[0040] Emergency Handling: If the thermometer 700 shows an abnormal temperature rise during heating, immediately turn off the electric heater, check if the heating element is faulty, and troubleshoot the problem after the temperature drops to a safe range; If the equipment experiences severe vibration, abnormal noise, or motor overload alarm during stirring, immediately turn off the servo motor, check if the stirring blade 220 is stuck, if the scraper 400 is excessively rubbing against the tank wall, or if the material is clumped, and restart after troubleshooting; If material leakage occurs, immediately stop operation, turn off the power, clean up the leaked material, check if the sealing components are damaged, replace the seals, and then resume production.

[0041] This invention enables efficient and thorough mixing of materials within the reactor using a high-efficiency stirring component 200. It solves the problems of traditional reactors that often use a single type of stirring blade 220, resulting in limited stirring range, insufficient radial stirring intensity, and poor axial material circulation. This leads to insufficient stirring of bottom sediment, resulting in a stratification phenomenon of "uniform upper layer and sedimented lower layer," requiring manual stopping of stirring or extended stirring time. This not only affects production efficiency but also causes uneven color and performance fluctuations in coating products.

[0042] Furthermore, it should be noted that, in the description of this utility model, 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A reaction vessel for paint production, comprising a heated reaction vessel (100), characterized in that: The heating reactor (100) includes an outer heating tank (110) and an inner reaction tank (120). A high-efficiency stirring assembly (200) is rotatably arranged inside the reaction tank (120). The high-efficiency stirring assembly (200) includes a stirring rod (210) rotatably arranged inside the reaction tank (120). At least two sets of stirring blades (220) are arranged on the outer wall of the stirring rod (210). The two sets of stirring blades (220) are arranged vertically and vertically on the outer wall of the stirring rod (210). A first spiral conveying blade (230) is arranged on the stirring rod (210) below the lower stirring blade (220). A second spiral conveying blade (240) is arranged between the two sets of stirring blades (220).

2. The reaction vessel for coating production as described in claim 1, characterized in that: The reaction tank (120) includes an upper reaction zone (121) and a lower discharge zone (122). The discharge zone (122) has a structure that is larger at the top and smaller at the bottom. The first spiral conveying blade (230) is located in the discharge zone (122), and the outer diameter of the blade in the upward spiral direction increases sequentially.

3. The reaction vessel for coating production as described in claim 1, characterized in that: The stirring rod (210) is also provided with a mounting bracket (300) on the outside, and a scraper (400) is provided on the outside of the mounting bracket (300) to abut against the inner wall of the reaction vessel (120).

4. The reaction vessel for coating production as described in claim 3, characterized in that: The upper part of the scraper (400) abuts against the inner wall of the reaction zone (121), and the lower part of the scraper (400) abuts against the inner wall of the discharge zone (122).

5. The reaction vessel for coating production as described in claim 4, characterized in that: There are three scrapers (400), which are evenly distributed on the outside of the stirring rod (210).

6. The reaction vessel for coating production as described in claim 1, characterized in that: The upper part of the reactor is provided with a drive unit (500), the output shaft end of the drive unit (500) is connected to the stirring rod (210), the upper part of the stirring rod (210) penetrates the side wall of the reactor (120), and a sealed bearing is provided at the part connected to the side wall of the reactor (120).

7. The reaction vessel for coating production as described in claim 1, characterized in that: The heating reactor (100) is provided with a feed inlet (130) at the top and a discharge outlet (140) at the bottom, and a discharge valve (600) is provided inside the discharge outlet (140).

8. The reaction vessel for coating production as described in claim 6, characterized in that: The driving component (500) is a servo motor.

9. The reaction vessel for coating production as described in claim 1, characterized in that: The heating tank (110) is connected to an external electric heater, and a thermometer (700) is also installed on the heating tank (110).

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