Reaction kettle for sealant production
By combining the coating plate and the powder spraying assembly, the problem of powder clumping in sealant production was solved, achieving uniform distribution of powder in the reactor and improving the quality and consistency of the sealant.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUBEI CHIBI YONGXING IND & TRADE CO LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-04-17
AI Technical Summary
In existing reaction vessels, the powder and adhesive substrate tend to clump together when mixed in the sealant production process, leading to localized over-reaction, large batch-to-batch variations, thixotropic instability of the finished sealant, and reduced sealing performance.
The mixing method combines a coating plate and a powder spraying component. The coating plate evenly coats the substrate on the vessel wall, while the powder spraying component evenly sprays the powder onto the substrate. The main shaft rotates to drive the stirring frame to scrape off the powder. Combined with a screening fan and a cooling chamber, this ensures uniform powder distribution and temperature control.
This improved the uniformity of the powder in the reactor, reduced clumping, enhanced the mixing quality and the quality of the finished sealant, and ensured the uniformity and consistency of the sealant.
Smart Images
Figure CN121869276A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of sealant production technology, specifically a reaction vessel for sealant production. Background Technology
[0002] The reaction vessel used in sealant production is the core equipment for realizing key reactions such as mixing, polymerization, and cross-linking of sealant raw materials. The core functions of the reaction vessel are: to provide a controllable reaction environment, to achieve efficient stirring and mixing, to ensure uniform reaction and stable quality of materials, to adapt to the transfer and discharge of high viscosity systems, and to be widely used in the large-scale production of sealants in the fields of construction, automobiles, and electronics. In the early stages, open-type stirring tanks were the main type, which had low temperature control accuracy and poor stirring efficiency, relied on manual assistance, and were only suitable for low-end sealant production. They also had problems such as material contamination and batch instability. Later, sealed stirring tanks were gradually developed as the main type, and some of the early defects were optimized and solved.
[0003] However, during the production of sealants, the substrate and various auxiliary materials need to be thoroughly mixed. These auxiliary materials include many types of powders. Due to the high viscosity of the substrate itself, the powders are slow to wet during mixing, easily causing them to float and clump. This leads to over-reaction in later stages due to locally high concentrations, resulting in significant batch-to-batch variations, thixotropic instability, and substandard viscosity in the finished sealant. The root cause in the production process is that the existing mixing structure in the reactor has a small effective mixing area when mixing high-viscosity materials, easily forming dead zones. The pouring method for powder addition can easily cause excessively high concentrations at the inlet. To address these defects, the rotation speed of the mixing structure generally needs to be increased. However, simply increasing the speed will create more microbubbles in the reaction system, which are difficult to remove completely in the subsequent defoaming process, resulting in lower quality finished sealant. For example, the presence of microbubbles in the finished sealant will result in a porous structure during use, reducing its sealing performance. Summary of the Invention
[0004] To overcome the shortcomings of existing technologies, this invention proposes a reaction vessel for sealant production. This invention primarily addresses the problem of localized over-reaction caused by the clumping of powder during sealant production when mixed with an adhesive substrate.
[0005] The technical solution adopted by the present invention to solve its technical problem is: a reaction vessel for sealant production, including a base frame and a vessel body fixedly installed on the base frame, a feed inlet is provided at the upper end of the vessel body, and a discharge outlet is provided at the lower end of the vessel body; a main shaft is provided inside the vessel body, the upper end of the main shaft extends out of the vessel body and is rotatably connected to the vessel body; a power component for driving the main shaft to rotate is provided at the upper end of the vessel body; The main shaft is fixedly connected to coating plates at even intervals along the circumference inside the reactor. A stirring rack is fixedly connected to the main shaft at even intervals along the circumference below the coating plate. A scraper is provided at the upper end of the stirring rack. The scraper is used to scrape off the material on the inner wall of the vessel. The movement trajectory of the scraper includes the movement trajectory of the coating plate. The main shaft is equipped with a powder spraying component, which is used to spray the powder produced in the sealant production process onto the coating plate and then onto the substrate on the side wall of the reactor.
[0006] Preferably, the spreading plate is inclined in the vertical direction; the mixing rack is inclined in the vertical direction, and the inclination direction is opposite to that of the spreading plate.
[0007] Preferably, the powder spraying assembly includes a powder spraying pipe; the powder spraying pipe is located inside the main shaft and is fixedly connected to the main shaft; a screening fan is installed at the lower end of the powder spraying pipe 8; a mesh plate is provided on the upper part of the screening fan; powder spraying heads are evenly spaced along the vertical direction on the main shaft; the powder spraying heads are located between the coating plate and the scraper. A powder head is fixedly connected to the powder spraying pipe; the powder inlet port of the powder spraying head is connected to the powder head through a pipe; the air inlet port of the powder spraying head is connected to an external air supply device.
[0008] Preferably, a cooling chamber is provided on the side wall of the vessel within the coverage area of the coating plate; the cooling chamber is filled with a cooling medium.
[0009] Preferably, a flow meter for detecting the amount of powder sprayed is provided between the powder head and the powder spraying head.
[0010] Preferably, the mixing rack has a number of extrusion slits, and the length direction of the extrusion slits is vertical; Several extrusion heads are respectively arranged on both sides of the extrusion seam on the mixing frame; the extrusion heads are fixedly connected to the mixing frame; the extrusion heads are arranged in a trumpet shape, and the diameter of the feed end is larger than that of the discharge end; The discharge end of the extrusion head on both sides of the extrusion seam moves closer to one side of the extrusion seam.
[0011] Preferably, the feed end of the extrusion head is set at a lower height than the discharge end.
[0012] Preferably, the axes of all powder heads are at the same height.
[0013] Preferably, the lower end of the powder spraying pipe extends to the outside of the vessel body, and the lower end of the powder spraying pipe is connected to a waste bin by a snap-fit; the screening blower is fixedly installed on the waste bin.
[0014] Preferably, a stirring rod is provided on the main shaft, the stirring rod is arranged horizontally, and the cross-section of the stirring rod is elliptical; a low-friction layer is provided on the surface of the stirring rod.
[0015] The beneficial effects of this invention are as follows: 1. In this invention, when mixing the sealant powder with the adhesive substrate, the substrate is evenly coated onto the upper side wall of the reactor interior to a set thickness using a coating plate. Then, the powder is evenly sprayed onto the coated substrate surface using a powder spraying component within the main shaft. The rotation of the main shaft drives the rotation of the stirring frame, allowing a scraper to remove the sprayed powder from the reactor surface. This process of coating, spraying, and scraping is repeated to ensure even distribution of the powder within the adhesive substrate, preventing clumping after powder addition. This improves the uniformity of the mixture in the reactor, further resolving batch-to-batch variations in the final product and enhancing product quality.
[0016] 2. In this invention, because the coating plate is tilted, when it rotates with the main shaft, it can transport the material in the reactor from bottom to top and coat it on the side wall of the reactor. At the same time, the tilt direction of the stirring rack is opposite to that of the coating plate, so when the main shaft rotates, it will transport the material scraped off from the side wall and coated with powder from top to bottom. Through the above method, the material is circulated in the vertical direction, so as to achieve a more uniform distribution of powder in the reaction system, further improving the uniformity of mixing, avoiding the local over-reaction caused by powder agglomeration, and thus improving the mixing quality of the reactor.
[0017] 3. In this invention, powder is fed into the powder spraying pipe 8 from the upper end, and then the screening fan at the bottom is activated to provide a flotation force for the powder inside the pipe. The powder is then subjected to buoyancy and gravity inside the pipe. By controlling the magnitude of the flotation force, the powder can be separated vertically under different gravities. Heavier particles will fall to the bottom of the pipe under the action of gravity, while powder of suitable size will be suspended in the pipe, filling the internal space of the powder spraying pipe 8. Subsequently, under the action of the external air supply equipment, a fast-flowing airflow is introduced into the air inlet port of the powder spraying head. Based on Bernoulli's principle, a negative pressure is created at the powder inlet of the powder spraying head, which carries the suspended powder in the powder spraying tube 8 into the powder spraying head. Finally, the powder is discharged through the powder outlet and evenly sprayed onto the substrate coated on the side wall of the reactor. This achieves uniform distribution of the powder into the reaction system of the reactor, thereby improving the quality of the produced sealant. Since the powder is first screened by a screening fan, it ensures that the sprayed powder has a uniform particle size, avoiding the phenomenon of powder clumping before it is laid, thus improving the uniformity of powder distribution. Meanwhile, by uniformly mixing the powder with the air in the tube beforehand, the powder is in a uniformly suspended state before being dispersed into the reaction system, which further improves the uniformity of powder input. Therefore, the uniformity of the powder can be controlled from the input state to ensure the uniformity of its dispersion, thereby improving the uniformity of powder in the reaction vessel proposed in this technical solution when producing sealant and improving the quality of the sealant.
[0018] 4. In this invention, a cooling chamber is provided on the side wall of the reactor corresponding to the area coated by the coating plate to reduce the temperature of the substrate coated on the side wall of the reactor. By reducing the temperature, the fluidity of the substrate is reduced. Therefore, when the powder is sprayed onto the coated substrate, the flow of the substrate is reduced, thereby reducing the agglomeration caused by the flow of the powder. This reduces the occurrence of the powder becoming coarser again after being dispersed, and thus improves the uniformity of the powder after dispersion, thereby improving the uniformity of the reaction system.
[0019] 5. In this invention, the rotation of the main shaft drives the rotation of the stirring rack. During the rotation of the main shaft, the material is squeezed by the stirring rack and discharged through the extrusion seams, forming a high-pressure area at the seams to create a planar turbulent effect. Because the stirring rack is tilted, the movement trajectory of the extrusion seams on the stirring rack is spiral. Therefore, the turbulent flow formed during rotation will have a spiral distribution, improving the stirring effect of the stirring rack. At the same time, by setting two rows of extrusion heads with their outlet ends facing the extrusion seams on both sides, linear turbulent flow will be extruded. The linear turbulent flow on both sides will converge towards the planar turbulent flow formed by the extrusion seams, creating a collision effect among the three. Since they all exhibit a spiral movement, the degree of turbulence in the reaction system will increase. The collision of the turbulent flow can also prevent the material from agglomerating, thereby improving the uniformity of the material in the reactor. This improves the reaction uniformity of the reaction system in the reactor, and thus improves the consistency and quality of the produced sealant. Attached Figure Description
[0020] The invention will now be further described with reference to the accompanying drawings.
[0021] Figure 1 This is a schematic diagram of the overall installation structure of the reactor in this invention; Figure 2 This is a schematic diagram of the overall structure of the reactor in this invention; Figure 3 This is a schematic diagram of the first internal structure of the reactor in this invention; Figure 4 This is a schematic diagram of the second internal structure of the reactor in this invention; Figure 5 This is a schematic diagram of the installation structure of the pressure sensor in this invention; Figure 6 This is a schematic diagram of the installation structure of the stirring rack and the main shaft in this invention; Figure 7 This is a schematic diagram of the working relationship between the stirring head and the extrusion seam in this invention; Figure 8 This is a schematic diagram of the installation structure of the powder spraying head and the powder head in this invention; Figure 9 This is a schematic diagram of the installation structure of the powder spraying head and the main shaft in this invention; Figure 10 This is a schematic diagram of the structure of the stirring rod and the low-friction layer in this invention; In the diagram: 1. Base frame; 2. Kettle body; 3. Main shaft; 4. Power assembly; 5. Coating plate; 6. Stirring rack; 7. Scraper; 8. Powder spraying pipe; 9. Screening fan; 10. Mesh plate; 11. Powder spraying head; 12. Powder head; 13. Cooling chamber; 14. Pressure sensor; 15. Extrusion seam; 16. Extrusion head; 17. Waste bin; 18. Stirring rod; 19. Low friction layer. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0023] Example 1; like Figures 1 to 3 As shown, a reaction vessel for producing sealant includes a base frame 1 and a vessel body 2 fixedly installed on the base frame 1. The upper end of the vessel body 2 is provided with a feed inlet, and the lower end of the vessel body 2 is provided with a discharge outlet. A main shaft 3 is provided inside the vessel body 2, and the upper end of the main shaft 3 extends out of the vessel body 2 and is rotatably connected to the vessel body 2. A power assembly 4 for driving the main shaft 3 to rotate is provided at the upper end of the vessel body 2. A coating plate 5 is fixedly connected at even intervals along the circumference inside the vessel body 2 on the main shaft 3. A stirring rack 6 is fixedly connected at even intervals along the circumference below the coating plate 5 on the main shaft 3. A scraper 7 is provided at the upper end of the stirring rack 6. The scraper 7 is used to scrape off the material on the inner wall of the vessel 2. The movement trajectory of the scraper 7 includes the movement trajectory of the coating plate 5. The main shaft 3 is equipped with a powder spraying component, which is used to spray the powder produced in the sealant production process onto the coating plate 5 and then onto the substrate on the side wall of the reactor body 2.
[0024] During production, the sealant requires thorough mixing of the substrate and various auxiliary materials. These auxiliary materials contain numerous powders. Due to the high viscosity of the substrate, the powders are slow to wet during mixing, leading to floating and clumping. This results in over-reaction in later stages due to localized high concentrations, ultimately causing significant batch-to-batch variations, thixotropic instability, and substandard viscosity in the finished sealant. The root cause lies in the existing mixing structure within the reactor, which has a small effective mixing area when mixing high-viscosity materials, easily forming dead zones. The pouring method for adding powders can cause excessively high concentrations at the inlet. While increasing the rotation speed of the mixing structure is generally necessary to address these issues, simply increasing the speed creates numerous microbubbles within the reaction system (the substrate and added auxiliary materials in the reactor), which are difficult to remove completely during subsequent defoaming, resulting in lower quality sealant. Microbubbles in the finished sealant also create a porous structure during use, reducing its sealing performance. Based on the technical problems existing in the production of sealant in the current reactor, this solution addresses these issues. When mixing the sealant powder with the adhesive substrate, the coating plate 5 evenly coats the substrate to a set thickness on the upper side wall inside the reactor. Then, the powder is evenly sprayed onto the coated substrate surface using the powder spraying component within the main shaft 3. The rotation of the main shaft 3 drives the rotation of the stirring frame 6, allowing the scraper 7 to scrape off the powdered material from the reactor surface. This cyclical process of coating, spraying, and scraping ensures the powder is evenly distributed within the adhesive substrate, preventing clumping after powder addition and improving the mixing uniformity of the reactor. This further solves the problem of batch variations in the final product and improves product quality.
[0025] The power component 4 can be composed of two gears and a motor. One gear is fixedly connected to the main shaft 3, and the other gear is fixedly connected to the output shaft of the motor. The two gears mesh to transmit power. It can also be composed of a synchronous belt pulley and a motor, that is, one synchronous belt is fixedly connected to the main shaft 3, and the other synchronous belt is fixedly connected to the output shaft of the motor, and the two synchronous belts are connected by the synchronous belt. like Figures 3 to 5 As shown, the spreading plate 5 is inclined in the vertical direction; the mixing rack 6 is inclined in the vertical direction, and the inclination direction is opposite to that of the spreading plate 5.
[0026] like Figure 6The rotation direction is shown in the diagram. Because the coating plate 5 is tilted, when it rotates with the main shaft 3, it can transport the material in the reactor from bottom to top and coat it on the side wall of the reactor. At the same time, the tilt direction of the stirring rack 6 is opposite to that of the coating plate 5. When the main shaft 3 rotates, it will transport the material that has been scraped off the side wall and sprayed with powder from top to bottom. In this way, the material is circulated in the vertical direction, so that the powder can be more evenly distributed in the reaction system, further improving the uniformity of mixing, avoiding the local over-reaction caused by powder agglomeration, and thus improving the mixing quality of the reactor.
[0027] Example 2: like Figure 4 and Figure 5 As shown, the powder spraying assembly includes a powder spraying pipe 8; the powder spraying pipe 8 is located inside the main shaft 3 and is fixedly connected to the main shaft 3; a screening fan 9 is installed at the lower end of the powder spraying pipe 8; a mesh plate 10 is provided on the upper part of the screening fan 9; the mesh plate 10 is fixedly connected to the powder spraying pipe 8; powder spraying heads 11 are evenly spaced along the vertical direction on the main shaft 3; the powder spraying heads 11 are located between the coating plate 5 and the scraper 7. A powder head 12 is fixedly connected to the powder spraying pipe 8; the powder inlet port of the powder spraying head 11 is connected to the powder head 12 through a pipe; the air inlet port of the powder spraying head 11 is connected to an external air supply device.
[0028] During operation, when spraying powder, the powder is fed into the upper end of the spraying pipe 8. Then, the lower screening fan 9 is activated to provide a flotation force for the powder inside the pipe. The powder is subjected to buoyancy and gravity within the pipe. By controlling the magnitude of the flotation force, different gravitational forces allow the powder to be separated when placed vertically. Heavier particles fall to the bottom of the pipe under gravity, while appropriately sized particles remain suspended, filling the internal space of the spraying pipe 8. Subsequently, under the action of an external air supply device, the powder is directed towards the air inlet port of the spraying head 11 (e.g., ...). Figure 8 If a rapidly flowing airflow is introduced at point r in the powder spray head 11, then, according to Bernoulli's principle, the powder inlet port (e.g., at point r) will be affected. Figure 8 A negative pressure will be formed at point 's' in the spray tube 8, thereby carrying the suspended powder inside the spray head 11, and finally through the powder outlet (e.g., at point 's') on it. Figure 8The powder is removed from the reactor (at point t) and then evenly sprayed onto the substrate coated on the side wall of the reactor. This ensures that the powder is evenly distributed into the reaction system of the reactor, thereby improving the quality of the produced sealant. Since the powder is first screened by the screening fan 9, the sprayed powder is ensured to be of uniform particle size, preventing powder from clumping before distribution and thus improving the uniformity of powder distribution. Simultaneously, by uniformly mixing the powder with air in the pipe beforehand, the powder is in a uniformly suspended state before being distributed into the reaction system, further improving the uniformity of powder input. Therefore, the uniformity of powder input can be controlled from the powder input state to ensure uniformity after distribution, thereby improving the uniformity of powder in the reactor used to produce sealant and improving the quality of the sealant.
[0029] The perforated plate 10 further disperses the airflow provided by the screening fan 9, making the buoyancy inside the pipe more uniform, thereby improving the uniformity of screening and making the control of buoyancy more precise.
[0030] like Figures 3 to 8 As shown, the axes of all powder heads 12 are at the same height.
[0031] During operation, by setting the axis of the powder head 12 at the same height, the particle size of the powder drawn into the powder spraying head 11 by the powder head 12 at different positions can be more uniform. If they are set at different heights in the vertical direction, the powder head 12 at the lower position will draw in larger particles than the powder head 12 at the upper position. At the same time, if the lower one draws out more powder, the powder content in the powder suspension in the upper tube will decrease. Therefore, under the same air flow, the amount of powder sprayed from different spraying heads 11 will be inconsistent, resulting in uneven powder distribution and reducing the uniformity of the reaction system. In this solution, all powder heads 12 are set at the same height plane, thus eliminating the above-mentioned adverse situation, thereby improving the uniformity of powder distribution and improving the uniformity and quality of the sealant.
[0032] like Figures 1 to 3 As shown, the lower end of the powder spraying pipe 8 extends to the outside of the vessel body 2, and the lower end of the powder spraying pipe 8 is connected to the waste bin 17 by a snap-fit; the screening fan 9 is fixedly installed on the waste bin 17.
[0033] During operation, due to the aggregation of powder materials, the powder particles screened by the screening fan 9 will settle at the bottom of the powder spraying pipe 8. If the reactor continues to produce for a long time, the residual powder particles will accumulate, causing inaccurate powder screening. Therefore, by setting a waste bin 17 at the bottom and using a snap-fit connection, it can be easily removed, thereby facilitating the cleaning of the inside of the powder spraying pipe 8. This improves the screening accuracy while ensuring the service life of the reactor.
[0034] Example 3; like Figure 4 and Figure 5 As shown, a cooling chamber 13 is provided on the side wall of the vessel body 2 within the coverage area of the coating plate 5; the cooling chamber 13 is filled with a cooling medium.
[0035] During operation, the sealant substrate, after being initially applied to the side wall of the reactor, still retains a certain degree of fluidity. Therefore, when the powder is sprayed onto the surface of the substrate, it tends to flow downwards under the influence of gravity before being scraped off. During this flow, the powder on the surface will aggregate, forming agglomerates, which can lead to local over-reaction. Therefore, in this solution, a cooling chamber 13 is set on the side wall of the reactor corresponding to the area coated by the coating plate 5 to reduce the temperature of the substrate coated on the side wall of the reactor. By reducing the temperature, the fluidity of the substrate is reduced. Thus, when the powder is sprayed onto the substrate, the flow of the substrate is reduced, thereby reducing the agglomeration caused by the flow of powder. This reduces the occurrence of powder coarsening after dispersion, and improves the uniformity of the powder after dispersion, thereby improving the uniformity of the reaction system.
[0036] The cooling medium in the cooling chamber 13 can be cooling oil, cooling water, or cooled air that has been processed by the cooling equipment. The cooling medium inlet and outlet are respectively set on the side wall of the reactor. After the cooling medium is reduced to the set temperature, it enters the cooling chamber 13 from the inlet through the pumping equipment, circulates once, and is discharged from the outlet. It is then processed by the cooling device again and reused.
[0037] Example 4; Based on the above embodiment three, another embodiment is provided, which includes a flow meter for detecting the amount of powder sprayed between the powder head 12 and the powder spraying head 11.
[0038] During operation, because the powder is screened after being fed into the powder spraying pipe 8 and then added to the reaction system, a small amount of agglomerated powder is excluded from the reaction system. Therefore, the control of the amount of powder added is not precise enough. Therefore, in this solution, a flow meter is set on the powder spraying path to record the total amount of powder sprayed, thereby improving the accuracy of the actual amount of powder sprayed and thus improving the quality of the sealant.
[0039] Meanwhile, in the production process of sealant, it is generally necessary to control the reaction process of the reaction system in order to discharge the material at the appropriate time. The existing control method is generally based on the reaction time. However, this method is not precise enough when the powder distribution is uneven. Therefore, in this solution, the viscosity of the reaction system is detected by the data collected by the torque sensor and the corresponding pressure sensor 14 on the coating plate 5. This allows for monitoring of the state of the reaction system from another perspective, thereby improving the accuracy of the detection and further improving the accuracy of the sealant discharge, and thus improving the quality of the sealant discharge.
[0040] Example 5: Secondly, a torque sensor for detecting the torque of the main shaft 3 can be installed on the main shaft 3 (the torque sensor of the main shaft 3 mainly adopts a strain gauge type torque sensor, in which metal strain gauges are placed on the surface of the main shaft 3 to detect the minute torsional deformation when the main shaft 3 rotates, and the resistance value of the strain gauge will change synchronously with the deformation; the resistance change is converted into a voltage signal through a Wheatstone bridge, and after amplification, it can be converted into a torque value); a pressure sensor 14 for detecting the pressure when the coating plate 5 is applied is installed on the side wall of the reactor; a notch is provided on the coating plate 5 at the position of the pressure sensor 14; a data processing component for processing the data detected by the torque sensor and the pressure sensor 14 is also included; a powder spraying control component is used to formulate a powder spraying amount scheme based on the processing results of the data processing component; a powder spraying command component is used to convert the powder spraying amount scheme information into a command that the powder spraying execution component can recognize, and the powder spraying execution component is a gas supply device; During operation, a torque sensor is installed on the main shaft 3 to monitor the total torsional force Q of the main shaft 3 during the stirring process. At the same time, a pressure sensor 14 is installed at the position where the coating plate 5 moves to monitor the coating pressure K of the coating plate 5 during the coating process (since the coating plate 5 does not fully contact the side wall of the reactor, the pressure is transmitted to the pressure sensor 14 through the sealant during the coating process. Therefore, the higher the viscosity of the sealant, the greater the pressure transmitted to the pressure sensor 14. Thus, by monitoring the pressure on the pressure sensor 14, the viscosity of the material in the reaction system can be detected). Subsequently, the collected data is transmitted to the data processing component to remove noise from the data, and then the processed data is transmitted to the powder spraying control component. The powder spraying control component calculates the actual amount of powder sprayed in the reaction system, and then calculates the amount of powder sprayed required. Then, the command is transmitted to the gas supply equipment to control the subsequent amount of powder sprayed, thereby achieving accurate control of the amount of powder sprayed.
[0041] By comprehensively considering multiple data sources, the actual amount of powder sprayed can be determined, and closed-loop control can be achieved. This allows for more precise control of the actual amount of powder sprayed, thereby improving the controllability of the sealant produced in the reactor.
[0042] Before formal production, the torque Q, pressure K, and powder quantity were calibrated through batch experiments. The quantitative relationship is established to generate a calibration database; using the calibrated data, a correlation formula 1 is established between powder quantity and torque and pressure through multiple linear regression fitting: ; where a, b, c, d, and e are fitting coefficients, calculated from the experimental data above; Subsequently, based on the product's design and formulation requirements, the target powder quantity was determined. And obtain the corresponding target torque accordingly. and target pressure ; During the production process, the data processing component collects data in real time. , And the total amount of powder sprayed accumulated by the flow meter ; The noise-removed data from the aforementioned data processing components is then substituted into Formula 1, the correlation formula between powder quantity, torque, and pressure, to obtain the desired result. ; Then calculate the amount of powder that needs to be added. ; like This indicates insufficient powder; the air supply equipment needs to be activated to replenish the powder. like This indicates that the powder has met the standards; stop spraying powder.
[0043] Among them Let be the coefficient, and satisfy . It is calculated based on the user's settings.
[0044] Finally, the power of the air supply equipment is controlled based on the calculated amount of powder to be replenished, thereby controlling the amount of powder sprayed.
[0045] Example 6: like Figure 6 and Figure 7 As shown, the mixing rack 6 has several extrusion slits 15, and the length direction of the extrusion slits 15 is vertically set. Several extrusion heads 16 are respectively arranged on both sides of the extrusion seam 15 on the mixing frame 6; the extrusion heads 16 are fixedly connected to the mixing frame 6; the extrusion heads 16 are arranged in a trumpet shape, and the diameter of the feeding end is larger than that of the discharging end. The discharge end of the extrusion head 16 on both sides of the extrusion seam 15 moves closer to one side of the extrusion seam 15.
[0046] During operation, in the sealant production process, the rotation of the main shaft 3 drives the rotation of the mixing frame 6. As the main shaft 3 rotates, the material is compressed by the mixing frame 6, and the material is expelled through the extrusion slots 15, creating a high-pressure area at the extrusion slots 15, thus forming a planar turbulent flow effect (e.g., Figure 7 As shown in m); due to the inclined arrangement of the mixing frame 6, the movement trajectory of the extrusion slit 15 on the mixing frame 6 is a spiral trajectory. Therefore, the turbulence formed during its rotation will exhibit a spiral distribution, thereby improving the mixing effect of the mixing frame 6; at the same time, by setting two rows of extrusion heads 16 with their outlet ends facing the extrusion slit 15 on both sides of the extrusion slit 15, linear turbulence will be extruded (as shown in m). Figure 7 As shown in n), the linear torrents on both sides will converge towards the planar torrents formed by the extrusion slit 15, and the three will have a collision effect. At the same time, they all exhibit a spiral motion, which will increase the degree of material movement disorder in the reaction system. The collision of the torrents can also prevent the material from agglomerating, thereby improving the uniformity of the material in the reactor, thus improving the reaction uniformity of the reaction system in the reactor, and thus improving the consistency and quality of the produced sealant.
[0047] Meanwhile, when setting the extrusion head 16, setting the extrusion head 16 into a trumpet-shaped structure can increase the discharge speed at the outlet, thereby increasing the speed of the linear jet. By generating a speed difference between the planar jet and the linear jet, the relative stillness between the two jets is avoided, thus improving the mixing efficiency.
[0048] like Figure 3 and Figure 9 As shown, the feed end of the extrusion head 16 is set at a height lower than the discharge end.
[0049] During operation, since the materials in the reaction system must eventually be discharged, by setting the larger diameter feed end of the extrusion head 16 lower, the extrusion head is tilted downwards in the vertical direction. During the discharge process, the material can be discharged more smoothly from the extrusion head 16, thereby controlling the residue at the extrusion head 16 and improving the applicability of the reactor. At the same time, it facilitates the draining of the reactor in the subsequent cleaning process, thereby improving the cleanliness of the reactor.
[0050] Example 7: like Figure 10 As shown, a stirring rod 18 is provided on the main shaft 3. The stirring rod 18 is arranged horizontally and has an elliptical cross section. A low-friction layer 19 is provided on the surface of the stirring rod 18.
[0051] During operation, the horizontally arranged stirring rod 18 disperses the vertical planar torrent formed by the extrusion seam 15 during rotation, thereby improving the uniformity of the reaction system after stirring and thus improving the stirring uniformity of the reactor. The low-friction layer 19 can be polytetrafluoroethylene (PTFE) (PTFE has a surface energy of only about 18 mN / m, which is much lower than most sealant systems, making it less likely for the sealant to adhere to the surface of the stirring rod, thus reducing bubbles caused by adhesion-peeling), Teflon coating, polyetheretherketone coating, zirconium oxide, alumina ceramic coating, or fluorinated modified polyurethane coating, etc. By reducing the frictional resistance of the stirring rod 18 surface, the cross-sectional adhesion between the fluid and the stirring rod 18 surface is weakened, inhibiting the generation, retention, and coalescence of bubbles, thereby reducing the generation of bubbles during the stirring process and improving the quality of the sealant. The low frictional resistance mainly controls the roughness of the surface in contact with the reaction system, controlling Ra≤0.2μm.
[0052] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A reaction vessel for producing sealant, comprising a base frame (1) and a vessel body (2) fixedly mounted on the base frame (1), wherein a feed inlet is provided at the upper end of the vessel body (2) and a discharge outlet is provided at the lower end of the vessel body (2); characterized in that: The vessel body (2) is provided with a main shaft (3), the upper end of the main shaft (3) extends out of the vessel body (2) and is rotatably connected to the vessel body (2); the upper end of the vessel body (2) is provided with a power assembly (4) for driving the main shaft (3) to rotate. The main shaft (3) is fixedly connected with coating plates (5) at uniform intervals along the circumferential direction inside the vessel body (2). A stirring rack (6) is fixedly connected at even intervals along the circumference of the main shaft (3) below the coating plate (5), and a scraper (7) is provided at the upper end of the stirring rack (6); the scraper (7) is used to scrape off the material on the inner wall of the vessel body (2), and the movement trajectory of the scraper (7) includes the movement trajectory of the coating plate (5); The main shaft (3) is equipped with a powder spraying assembly, which is used to spray the powder produced in the sealant production process onto the coating plate (5) and then onto the substrate on the side wall of the reactor body (2).
2. The reaction vessel for sealant production according to claim 1, characterized in that: The coating plate (5) is inclined in the vertical direction; the mixing rack (6) is inclined in the vertical direction, and the inclination direction is opposite to that of the coating plate (5).
3. The reaction vessel for sealant production according to claim 2, characterized in that: The powder spraying assembly includes a powder spraying tube (8); the powder spraying tube (8) is located inside the main shaft (3) and is fixedly connected to the main shaft (3); a screening fan (9) is installed at the lower end of the powder spraying tube (8); a mesh plate (10) is provided on the upper part of the screening fan (9); powder spraying heads (11) are evenly spaced along the vertical direction on the main shaft (3); the powder spraying heads (11) are located between the coating plate (5) and the scraper (7); A powder head (12) is fixedly connected to the powder spraying pipe (8); the powder inlet port of the powder spraying head (11) is connected to the powder head (12) through a pipe; the air inlet port of the powder spraying head (11) is connected to an external air supply device.
4. The reaction vessel for sealant production according to claim 3, characterized in that: The side wall of the vessel body (2) is provided with a cooling chamber (13) located within the coverage area of the coating plate (5); the cooling chamber (13) is filled with a circulating cooling medium.
5. The reaction vessel for sealant production according to claim 4, characterized in that: A flow meter for detecting the amount of powder sprayed is provided between the powder head (12) and the powder spraying head (11).
6. The reaction vessel for sealant production according to claim 5, characterized in that: The mixing rack (6) has several extrusion slits (15), and the length direction of the extrusion slits (15) is vertically arranged; The mixing rack (6) is provided with a plurality of extrusion heads (16) on both sides of the extrusion seam (15); the extrusion heads (16) are fixedly connected to the mixing rack (6); the extrusion heads (16) are arranged in a trumpet shape, and the diameter of the feeding end is larger than that of the discharging end; The discharge end of the extrusion head (16) on both sides of the extrusion seam (15) moves closer to one side of the extrusion seam (15).
7. The reaction vessel for sealant production according to claim 6, characterized in that: The feed end of the extrusion head (16) is set at a height lower than the discharge end.
8. The reaction vessel for sealant production according to claim 7, characterized in that: The axes of all the powder heads (12) are at the same height.
9. A reaction vessel for producing sealant according to claim 8, characterized in that: The lower end of the powder spraying pipe (8) extends to the outside of the vessel body (2), and the lower end of the powder spraying pipe (8) is connected to the waste bin (17) by a snap fastener; the screening fan (9) is fixedly installed on the waste bin (17).
10. A reaction vessel for producing sealant according to claim 9, characterized in that: A stirring rod (18) is provided on the main shaft (3). The stirring rod (18) is arranged horizontally and has an elliptical cross section. A low-friction layer (19) is provided on the surface of the stirring rod (18).