An agitated reaction vessel and method for epoxy-based wood primer

Abstract

The present application belongs to the technical field of chemical machinery, and specifically discloses a stirring reaction kettle and method for epoxy-based wood primer, which comprises a base, a heating mechanism, an adding mechanism and a kettle body. The kettle body is fixedly installed above the base and externally fixedly sleeved with a heat preservation jacket. The adding mechanism is arranged on one side inside the kettle body. A raw material adding pipe is communicatively installed on the side of the kettle body which is away from the adding mechanism. A rotating shaft is rotatably installed in the middle of the kettle body. The present application forms a multi-scale shear force field through the push-cut extrusion piece, realizes the full mixing of material molecules in scale, improves the completeness and uniformity of the reaction, and produces the primer with uniform crosslinking density and excellent comprehensive performance. The equipment is stable in operation and suitable for industrialized continuous production.

Description

Technical Field

[0001] This invention belongs to the field of chemical machinery technology, and specifically discloses a stirred reaction vessel and method for epoxy wood primer. Background Technology

[0002] Epoxy resins are widely used as primers for wood coatings due to their excellent adhesion, chemical resistance, and mechanical strength. The core process in the production of epoxy wood primers lies in the thorough mixing and prepolymerization reaction of the epoxy resin and curing agents (such as amines and acid anhydrides) in a reactor. The uniformity and completeness of this reaction process directly determine the final primer's curing performance, film quality, and stability.

[0003] Traditional reactor stirring technology mainly relies on anchor, paddle, or turbine agitators installed inside the reactor. The rotation of the impeller drives the fluid to form a macroscopic flow, achieving material mixing. However, existing technologies have significant limitations for mixing epoxy resin systems and curing agents. From a chemical kinetics perspective, epoxy resin molecules have long chains, and curing agent molecules (especially polyamines) must overcome significant steric hindrance when contacting epoxy groups in the initial stages of the reaction. The macroscopic convective mixing produced by conventional stirring provides a weak and unevenly distributed shear field, making it difficult to effectively break up the agglomerates or laminar flows formed by intermolecular forces in the system. This results in curing agent molecules not being able to fully collide and diffuse with the epoxy resin at the molecular level. The reaction often remains at the macroscopic mixing stage, causing uneven local reaction. This leads to epoxy resin and curing agent molecules being encapsulated, resulting in incomplete overall reaction. The final product quality manifests as: insufficient crosslinking density after primer curing, decreased resistance to media; or, due to excessively rapid local reactions and over-crosslinking, increased internal stress in the coating, making it prone to microcracks and reduced adhesion.

[0004] Therefore, designing a stirring reaction device that can apply high-intensity, multi-scale shear force to the epoxy resin and curing agent system during the reaction process to break the molecular barrier, achieve microscopic uniform mixing, and promote the complete reaction has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the background art, and to propose a stirring reactor for epoxy wood primer, including a base, a heating mechanism, an adding mechanism, and a reactor body. The reactor body is fixedly installed on the base and is externally fitted with a heat-insulating jacket. The adding mechanism is located inside the reactor body on one side. A raw material adding pipe is connected to the side of the reactor body away from the adding mechanism. A rotating shaft is rotatably installed in the middle of the reactor body. One end of the rotating shaft extends to the top of the reactor body and is connected to a motor. The motor is fixedly installed on the top of the reactor body. Dispersing blades are arranged below the outside of the rotating shaft. A filtering and conveying mechanism is arranged above the inside of the reactor body. A lower protrusion is fixedly installed above the outside of the rotating shaft. A rotating component is arranged outside the lower protrusion. Pushing, cutting, and extruding components for accelerating the reaction are arranged on both sides inside the lower protrusion. A discharge pipe is connected to the front side of the inside of the reactor body.

[0006] In the above technical solution, the heating mechanism further includes a heater and an electric heating plate. A jacket is provided at the bottom of the interior of the vessel body. The electric heating plate is fixedly installed inside the jacket. The heater is fixedly installed on one side of the electric heating plate. The side of the heater away from the electric heating plate extends to the outside of the vessel body.

[0007] In the above technical solution, the adding mechanism further includes a metering pump, a curing agent adding pipe and an injection pipe. The curing agent adding pipe and the injection pipe are respectively connected and installed at the feed end and the feeding end of the metering pump. The end of the injection pipe away from the metering pump extends into the inside of the reactor body. The metering pump is fixedly installed on the base and on the side close to the reactor body.

[0008] In the above technical solution, the filtration conveying mechanism further includes a filter disc and an inner cylinder. An annular disc is fixedly sleeved on the outside of the inner cylinder. The filter disc is fixedly installed above the annular disc. A channel for embedding the inner cylinder is opened in the middle of the filter disc.

[0009] In the above technical solution, a spiral pusher blade is fixedly installed on the outside of the rotating shaft and near the inside of the inner cylinder. An injection port is opened on the inside of the inner cylinder and near the lower side of the filter plate. The spiral pusher blade is used to push the material at the bottom of the vessel to the top of the filter plate. Two sets of symmetrically installed position sensors are fixedly installed on the upper surface of the filter plate.

[0010] In the above technical solution, the rotating component further includes multiple bearing mounting seats, which are installed at equal intervals along the circumferential direction above the inner wall of the vessel. The lower protrusion is connected to a ring frame at both ends, and the ring frame is rotatably installed inside the multiple bearing mounting seats.

[0011] In the above technical solution, the pushing, cutting, and extruding component further includes a pressure rod, with a ball bearing embedded in the upper part of the pressure rod. The pressure rod slides through the lower protrusion, and a spring is sleeved on the lower part of the pressure rod. A pressure plate is fixedly connected to the lower end of the pressure rod. The two ends of the spring are respectively connected to the lower surface of the lower protrusion and the upper surface of the pressure plate. A position sensor is fixedly installed on the upper surface of the lower protrusion and on the side near the pressure rod. Sleeves are fixedly installed on the upper surfaces of both sides of the reactor body. A stop rod is slidably installed inside each of the two sleeves. A cylinder is provided at the upper end of the stop rod, and the cylinder is fixedly embedded in the upper part of the sleeve.

[0012] In the above technical solution, a ring rod is further installed between the two pressure plates, and a clamping rod is fixedly installed on the upper surface of both sides of the ring rod. A rotating rod is fixedly installed inside the side of the two clamping rods that are far apart from each other, and a slicing plate is installed at equal distances along the horizontal direction on the outside of the two rotating rods.

[0013] A method for using a stirred reactor for an epoxy-based wood primer, comprising the following steps:

[0014] S1: First, inject the basic raw material of epoxy wood primer into the reactor through the raw material addition pipe on one side of the reactor body. Start the motor, and the motor drives the rotating shaft to rotate. The dispersing blades on the outside of the rotating shaft begin to initially stir and disperse the material in the lower part of the reactor body.

[0015] S2: During the stirring process, additives or curing agents are quantitatively added to the reactor through the addition mechanism set on one side of the reactor body. As the rotating shaft rotates, the lower protrusion fixedly installed on the outside of the rotating shaft rotates accordingly. The lower protrusion rotates smoothly under the support of the rotating parts. At the same time, the pushing, cutting and extruding parts on both sides inside the lower protrusion push and cut the reaction liquid surface during the rotation process, accelerating the mixing and reaction efficiency of the materials.

[0016] S3: During the reaction process, the material is circulated and filtered by the filter conveying mechanism under the drive of the rotating shaft to remove incompletely dispersed particles, ensuring the fineness of the paint. The filtered material is then returned to the inside of the reactor to participate in the reaction.

[0017] S4: According to process requirements, the heating mechanism is turned on to heat the inside of the reactor. The insulation jacket is used to maintain the temperature inside the reactor and ensure that the epoxy resin reacts and crosslinks fully at a suitable temperature.

[0018] S5: After the reaction is complete, the finished paint is discharged through the discharge pipe installed on the front side of the reactor body and enters the next process or packaging stage.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention innovatively incorporates a lower protrusion driven by a rotating shaft, based on conventional stirring and dispersing blades. Symmetrical pushing, cutting, and extruding components are installed on both sides of the lower protrusion. As this component rotates with the shaft, it continuously pushes and cuts the reaction liquid surface and its interior, generating a multi-scale shear force field that is significantly superior to traditional stirring methods. This dynamic shearing action effectively breaks down the agglomeration or laminar interface between epoxy resin molecules and curing agent molecules caused by steric hindrance, promoting full collision, diffusion, and contact between the curing agent and epoxy resin at the molecular scale. This fundamentally solves the drawbacks of uneven mixing and incomplete reaction associated with traditional stirring methods.

[0021] 2. This invention utilizes the coordinated operation of the pressure plate and slitting slices in the pushing, cutting, and extruding components. During rotation, the device not only horizontally agitates the material but also applies vertical extrusion and cutting. This combined motion ensures that materials in different areas of the reactor are subjected to uniform and strong shearing, preventing localized over- or under-reaction. The resulting epoxy wood primer exhibits uniform crosslinking density and a reasonable internal stress distribution, effectively improving coating adhesion, media resistance, and film stability, significantly enhancing the overall performance of the final product. Furthermore, the filtration and conveying mechanism at the top of the device continuously transports material from the bottom of the reactor to the filter plate for circulating filtration. This process not only removes any undispersed particles from the raw materials, ensuring the paint's fineness, but also, in conjunction with the pressure plate's extrusion, ensures the material passes through the filter pores uniformly under pressure. This further increases the material's flow path and mixing frequency during circulation, providing more opportunities for thorough contact between the epoxy resin and the curing agent, thus enhancing the completeness and uniformity of the reaction from a process perspective. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is another schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the inner side structure of the vessel body of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection structure between the filter disc and the inner cylinder of the present invention;

[0026] Figure 5 This is a schematic diagram of the connection structure between the rotating component, the lower protrusion, and the dispersing blades of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure of the present invention, showing the working state of the abutment acting on the ball and the pressure rod;

[0028] Figure 7 This is a schematic diagram of the connection structure between the sleeve and the cylinder of the present invention;

[0029] Figure 8 For the present invention Figure 6 Schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. Base; 2. Insulation jacket; 3. Raw material addition pipe; 4. Kettle body; 5. Heater; 6. Discharge pipe; 7. Metering pump; 8. Curing agent addition pipe; 9. Cylinder; 10. Motor; 11. Sleeve; 12. Filter plate; 13. Dispersion blade; 14. Electric heating plate; 15. Injection pipe; 16. Pressure plate; 17. Rotating shaft; 18. Ring frame; 19. Position sensor; 20. Inner cylinder; 21. Spiral pusher blade; 22. Injection port; 23. Lower protrusion; 24. Push rod; 25. Spring; 26. Ball bearing; 27. Bearing mounting seat; 28. Ring rod; 29. ​​Pressure rod; 30. Slicing piece; 31. Rotating rod; 32. Clamping rod. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0033] like Figures 1-8 The stirred reaction vessel for an epoxy wood primer shown includes a base 1, a heating mechanism, an adding mechanism, and a vessel body 4. The vessel body 4 is fixedly installed above the base 1 and externally fitted with an insulation jacket 2. The insulation jacket 2 is used to maintain a stable temperature inside the vessel and reduce heat loss. The adding mechanism is located inside the vessel body 4 on one side and is used to precisely add curing agents and other additives into the vessel. A raw material adding pipe 3 is connected to the side of the vessel body 4 away from the adding mechanism for adding base resin raw materials. A rotating shaft 17 is rotatably installed in the middle of the vessel body 4. One end of the rotating shaft 17 extends to the top of the vessel body 4 and the other end is connected to a motor 1. 0. The motor 10 is fixedly installed on the top of the vessel body 4. The lower part of the rotating shaft 17 is provided with dispersing blades 13 for preliminary stirring and dispersing of the material in the lower part of the vessel body 4. The upper part of the vessel body 4 is provided with a filter conveying mechanism. The upper part of the rotating shaft 17 is fixedly installed with a lower protrusion 23. The lower protrusion 23 is provided with a rotating part. The lower protrusion 23 is provided with a pushing, cutting and extruding part to accelerate the reaction on both sides. During the rotation, the component pushes and cuts the reaction liquid surface, which significantly enhances the mixing effect. The front side of the vessel body 4 is connected to a discharge pipe 6. The finished paint after the reaction is completed is discharged through the discharge pipe 6.

[0034] The heating mechanism includes a heater 5 and an electric heating plate 14. A jacket is provided at the bottom of the interior of the vessel body 4. The electric heating plate 14 is fixedly installed inside the jacket. The heater 5 is fixedly installed on one side of the electric heating plate 14. The side of the heater 5 away from the electric heating plate 14 extends to the outside of the vessel body 4.

[0035] In this embodiment, the heating mechanism consists of a heater 5 and an electric heating plate 14. A sandwich structure is reserved at the lower end of the interior of the vessel body 4. The electric heating plate 14 is fixedly installed inside the sandwich structure by high-temperature resistant bolts, and the heating surface of the electric heating plate 14 is tightly attached to the inner bottom wall of the vessel body 4. The heater 5 is fixedly installed on one side terminal of the electric heating plate 14 by a flange. The main control part of the heater 5 penetrates the side wall of the vessel body 4 and extends to the outside of the vessel body 4. A high-temperature resistant protective shell is installed on the outside. After being powered on, the electric heating plate 14 evenly conducts heat to the material inside the vessel body 4 to achieve heating of the reaction material.

[0036] The addition mechanism includes a metering pump 7, a curing agent addition pipe 8, and an injection pipe 15. The curing agent addition pipe 8 and the injection pipe 15 are respectively connected to the feed end and the feeding end of the metering pump 7. The end of the injection pipe 15 away from the metering pump 7 extends into the inside of the vessel body 4. The metering pump 7 is fixedly installed on the base 1 and close to the side of the vessel body 4.

[0037] In this embodiment, the metering pump 7 precisely controls the delivery flow rate according to the mixing ratio parameters set in the paint processing process. It extracts a fixed amount of curing agent or additive from the external storage tank through the curing agent addition pipe 8, and then delivers it to the stirring area inside the reactor body 4 through the injection pipe 15. The design of the discharge end of the injection pipe 15 facing the rotating shaft 17 allows the delivered curing agent to directly enter the stirring range of the dispersion blades 13 and quickly mix with the base raw materials.

[0038] The filter conveying mechanism includes a filter disc 12 and an inner cylinder 20. An annular disc is fixedly sleeved on the outside of the inner cylinder 20. The filter disc 12 is fixedly installed above the annular disc. A channel for embedding the inner cylinder 20 is opened in the middle of the filter disc 12.

[0039] In this embodiment, the annular disk achieves a firm connection and fixed position between the inner cylinder 20 and the filter disk 12, ensuring that all materials pass through the microporous structure of the filter disk 12. When the material passes through the micropores of the filter disk 12 under external force, the incompletely dispersed particles are intercepted by the micropores, thereby achieving material filtration and purification. The filtered pure material is returned to the inside of the reactor body 4 to continue participating in the reaction.

[0040] A spiral pusher blade 21 is fixedly installed on the outside of the rotating shaft 17 and near the inside of the inner cylinder 20. An injection port 22 is opened on the inside of the inner cylinder 20 and near the lower side of the filter plate 12. The spiral pusher blade 21 is used to push the material at the bottom of the vessel 4 to the top of the filter plate 12. Two sets of symmetrically installed position sensors 19 are fixedly installed on the upper surface of the filter plate 12.

[0041] In this embodiment, when the rotating shaft 17 rotates, it drives the spiral pusher blade 21 to rotate synchronously. The spiral lift of the spiral pusher blade 21 draws the material at the bottom of the vessel body 4 into the inner cylinder 20 through the injection port 22 and continuously pushes it upward to the top of the filter plate 12. The spiral pusher blade 21 and the inner cylinder 20 are fitted with a clearance to avoid mechanical friction during rotation. The position sensor 19 is used to detect the position when the lower protrusion 23 rotates.

[0042] The rotating component includes multiple bearing mounting seats 27, which are installed at equal intervals along the circumferential direction on the upper part of the inner wall of the vessel body 4. The lower protrusion 23 is connected to a ring frame 18 at both ends, and the ring frame 18 is rotatably installed inside the multiple bearing mounting seats 27.

[0043] In this embodiment, the rotation of the rotating shaft 17 drives the lower protrusion 23 to rotate synchronously. The lower protrusion 23 drives the ring frame 18 to rotate inside the bearing mounting seat 27. Multiple bearing mounting seats 27 are distributed equidistantly along the circumference to provide uniform circumferential support for the ring frame 18. The radial force generated by the rotation of the lower protrusion 23 is evenly distributed to the inner wall of the vessel body 4. At the same time, the rolling friction of the bearing replaces the sliding friction between the ring frame 18 and the vessel body, reducing the rotational resistance.

[0044] The pressing and cutting extrusion component includes a pressure rod 29, with a ball bearing 26 embedded in the upper part of the pressure rod 29. The pressure rod 29 slides through the lower protrusion 23. A spring 25 is sleeved on the lower part of the pressure rod 29. A pressure plate 16 is fixedly connected to the lower end of the pressure rod 29. The two ends of the spring 25 are respectively connected to the lower surface of the lower protrusion 23 and the upper surface of the pressure plate 16. A position sensor 19 is fixedly installed on the upper surface of the lower protrusion 23 and on the side close to the pressure rod 29. Sleeves 11 are fixedly installed on the upper surfaces of both sides of the vessel body 4. A stop rod 24 is slidably installed inside the two sleeves 11. A cylinder 9 is provided at the upper end of the stop rod 24. The cylinder 9 is fixedly embedded in the upper part of the sleeve 11.

[0045] In this embodiment, when the lower protrusion 23 rotates to below the abutment 24, the cylinder 9 acts as a power source, quickly pushing the abutment 24 to slide vertically downward along the sleeve 11. The lower end of the abutment 24 contacts the ball bearing 26 at the upper end of the pressure rod 29. The rolling of the ball bearing 26 transmits vertical pressure to the pressure rod 29, pushing the pressure rod 29 to slide downward along the through hole of the lower protrusion 23, compressing the spring 25 and driving the pressure plate 16 to apply vertical pressure to the material liquid surface. When the cylinder 9 drives the abutment 24 to return to its original position, the elastic return force of the spring 25 pushes the pressure rod 29 and the pressure plate 16 to rebound upward, realizing the reciprocating pressing of the pressure plate 16.

[0046] A ring rod 28 is installed between the two pressure plates 16. A clamping rod 32 is fixedly installed on the upper surface of both sides of the ring rod 28. A rotating rod 31 is fixedly installed inside the side of the two clamping rods 32 that is far apart from each other. Slicing pieces 30 are installed at equal distances along the horizontal direction on the outside of the two rotating rods 31.

[0047] In this embodiment, the ring rod 28 connects the two pressure plates 16 into a whole, ensuring the synchronicity of the pressing action of the two pressure plates 16; the rotation of the lower protrusion 23 drives the pressure plates 16 to make synchronous circular motion, and the pressure plates 16 drive the clamping rod 32, the rotating rod 31 and the dividing slice 30 to make synchronous circular rotation through the ring rod 28. The sharp edge of the dividing slice 30 cuts the material above the filter plate 12; at the same time, the flow of the material will drive the rotating rod 31 to rotate slightly around its own axis, so that the dividing slice 30 forms a multi-angle dynamic cutting of the material;

[0048] It should be noted that the cutting of the slicing 30 and the vertical extrusion of the pressure plate 16 form a composite shear force field, generating multi-scale shear force, which effectively breaks the spatial steric hindrance between epoxy resin and curing agent molecules, achieving full mixing at the molecular scale, and fundamentally solving the drawbacks of incomplete reaction in traditional stirring.

[0049] Furthermore, the rotation of the rotating rod 31 enables dynamic cutting at multiple angles, further improving the cutting effect. The equally spaced cutting slices 30 ensure that materials in different areas of the reactor are subjected to uniform shearing action, avoiding local reactions that are too fast or too insufficient. The cutting slices 30, made of high-strength wear-resistant material, can effectively improve the wear resistance of the equipment and extend its service life.

[0050] A method for using a stirred reactor for an epoxy-based wood primer, comprising the following steps:

[0051] S1: First, inject the basic raw material of epoxy wood primer into the reactor 4 through the raw material addition pipe 3 on one side of the reactor 4. Start the motor 10. The motor 10 drives the rotating shaft 17 to rotate. The dispersing blades 13 on the outside of the rotating shaft 17 begin to initially stir and disperse the material in the lower part of the reactor 4.

[0052] S2: During the stirring process, additives or curing agents are quantitatively added to the reactor through the addition mechanism set on one side inside the reactor body 4. As the rotating shaft 17 rotates, the lower protrusion 23 fixedly installed on the upper part of the rotating shaft 17 rotates accordingly. The lower protrusion 23 rotates smoothly under the support of the rotating parts. At the same time, the pushing, cutting and extruding parts on both sides inside the lower protrusion 23 push and cut the reaction liquid surface during the rotation process, accelerating the mixing and reaction efficiency of the materials.

[0053] S3: During the reaction process, the material is driven by the rotating shaft 17 and circulated through the filter conveying mechanism to remove incompletely dispersed particles, ensuring the fineness of the paint. The filtered material is then returned to the inside of the reactor body 4 to participate in the reaction.

[0054] S4: According to process requirements, the heating mechanism is turned on to heat the inside of the reactor body 4. The insulation jacket 2 is used to maintain the temperature inside the reactor and ensure that the epoxy resin reacts and crosslinks fully at a suitable temperature.

[0055] S5: After the reaction is complete, the finished paint is discharged through the discharge pipe 6 installed on the front side of the inside of the kettle body 4, and enters the next process or packaging stage.

[0056] Working principle: Epoxy wood primer base material is injected into the reactor body 4 through the raw material addition pipe 3. The motor 10 drives the rotating shaft 17 to rotate. The dispersing blades 13 on the lower part of the rotating shaft 17 rotate with the shaft, initially stirring and dispersing the raw material in the lower part of the reactor body 4, breaking up the initial agglomeration and laying the foundation for subsequent mixing and reaction with the curing agent. Simultaneously, the metering pump 7 quantitatively extracts the curing agent through the curing agent addition pipe 8 and accurately delivers it into the reactor body 4 through the injection pipe 15, achieving quantitative addition of the reactants. As the rotating shaft 17 continues to rotate, the lower protrusion 23, fixedly installed on the upper part of the rotating shaft 17, rotates synchronously. The two ends of the lower protrusion 23 are rotatably engaged with multiple bearing mounting seats 27 installed on the inner wall of the reactor body 4 through the ring frame 18. This rotating component ensures the rotational stability of the entire lower protrusion 23. When the position sensor 19 of the lower protrusion 23 rotates to the stop rod 24, the cylinders 9 inside the sleeves 11 on both sides of the reactor body 4 quickly drive the stop rod 24 to extend downwards. The lower end of the push rod 24 abuts against the ball bearing 26 embedded in the upper end of the pressure rod 29, forcing the pressure rod 29 to slide downward against the elastic force of the spring 25, pushing the lower pressure plate 16 against the surface of the reaction liquid or the interior of the liquid layer. When the push rod 24 rotates and disengages from the ball bearing 26, the spring 25 returns to its original position, causing the pressure plate 16 to rise. While the pressure plate 16 moves up and down, the clamping rod 32, rotating rod 31, and slitting slice 30 installed on the ring rod 28 between the pressure plates 16 move in a circular motion with the lower protrusion 23, applying high-intensity pushing and cutting action to the material. At the same time, the pressure plate 16 is perpendicular to the filter plate 12, and the material passes through the pressure of the pressure plate 16, allowing the material to pass through the corresponding filter holes inside the filter plate 12. Thus, during the filtration process, dynamic shearing in different directions is completed, which can effectively break the agglomeration interface between epoxy resin and curing agent molecules, and promote the curing agent to fully collide and diffuse with the epoxy resin at the molecular level.

[0057] As the rotating shaft 17 rotates, the spiral pusher blades 21 rotate inside the inner cylinder 20, pushing the material at the bottom of the reactor 4 upwards along the inner cylinder 20. The material is conveyed to the top of the filter plate 12 through the injection port 22, where the filter plate 12 removes incompletely dispersed particles, allowing the material to flow back into the reactor 4 to participate in the reaction, forming a circulating filtration and mixing enhancement. During the entire reaction process, the heating mechanism can be activated according to process requirements. The heater 5 is activated, and the electric heating plate 14 heats the medium in the jacket of the reactor 4. The insulation jacket 2 maintains a constant temperature inside the reactor, ensuring that the epoxy resin and curing agent complete the crosslinking reaction under suitable temperature conditions.

[0058] After the reaction is complete, the finished paint is discharged through the discharge pipe 6 connected to the front of the reactor body 4 and enters the next process.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A stirred reaction vessel for epoxy wood primer, comprising a base (1), a heating mechanism, an adding mechanism, and a vessel body (4), characterized in that: The vessel body (4) is fixedly installed above the base (1) and is externally fitted with a heat-insulating jacket (2). The adding mechanism is located inside the vessel body (4) on one side. A raw material adding pipe (3) is connected to the side of the vessel body (4) away from the adding mechanism. A rotating shaft (17) is rotatably installed in the middle of the vessel body (4). One end of the rotating shaft (17) extends to the top of the vessel body (4) and is connected to a motor (10). The motor (10) is fixedly installed on the top of the vessel body (4). A dispersing blade (13) is provided below the outside of the rotating shaft (17). A filtering conveying mechanism is provided above the inside of the vessel body (4). A lower protrusion (23) is fixedly installed above the outside of the rotating shaft (17). A rotating... The moving part, the lower protrusion (23) is provided with pushing, cutting and extruding parts for accelerating reaction on both sides, the front side of the inside of the vessel body (4) is connected to the discharge pipe (6), the filtering and conveying mechanism includes a filter disc (12) and an inner cylinder (20), the inner cylinder (20) is fixedly sleeved with an annular disc, the filter disc (12) is fixedly installed above the annular disc, the filter disc (12) has a channel for embedding the inner cylinder (20) in the middle, the rotating shaft (17) is fixedly installed with a spiral pusher blade (21) on the outside of the shaft (17) and close to the inside of the inner cylinder (20), the inner cylinder (20) has an injection port (22) on the side below the filter disc (12), the spiral pusher blade (21) is used to push the material at the bottom of the vessel body (4) to the filter disc (12). Above the filter disc (12), two sets of symmetrically installed position sensors (19) are fixedly installed on the upper surface. The rotating component includes multiple bearing mounting seats (27). The multiple bearing mounting seats (27) are installed at equal intervals along the circumferential direction above the inner wall of the vessel body (4). The lower protrusion (23) is connected to a ring frame (18) at both ends. The ring frame (18) is rotatably installed inside the multiple bearing mounting seats (27). The pushing, cutting, and extruding component includes a pressure rod (29). A ball bearing (26) is embedded in the upper part of the pressure rod (29). The pressure rod (29) slides through the lower protrusion (23). A spring (25) is sleeved on the lower part of the pressure rod (29). A pressure plate (16) is fixedly connected to the lower end of the pressure rod (29). The two ends of the spring (25) are connected to the lower surface of the lower protrusion (23) and the upper surface of the pressure plate (16) respectively. A position sensor (19) is fixedly installed on the upper surface of the lower protrusion (23) and on the side near the pressure rod (29). Sleeves (11) are fixedly installed on the upper surfaces of both sides of the vessel body (4). A stop rod (24) is slidably installed inside the two sleeves (11). A cylinder (9) is provided at the upper end of the stop rod (24). The cylinder (9) is fixedly embedded in the upper part of the sleeve (11). A ring rod (28) is installed between the two pressure plates (16). A locking rod (32) is fixedly installed on the upper surfaces of both sides of the ring rod (28). A rotating rod (31) is fixedly installed inside the side of the two locking rods (32) that are far apart from each other.Both rotating rods (31) have horizontally equidistant slices (30) installed on their exteriors.

2. The stirred reactor for an epoxy wood primer according to claim 1, characterized in that: The heating mechanism includes a heater (5) and an electric heating plate (14). A jacket is provided inside the lower part of the vessel body (4). The electric heating plate (14) is fixedly installed inside the jacket. The heater (5) is fixedly installed on one side of the electric heating plate (14). The side of the heater (5) away from the electric heating plate (14) extends to the outside of the vessel body (4).

3. The stirred reaction vessel for an epoxy wood primer according to claim 1, characterized in that: The addition mechanism includes a metering pump (7), a curing agent addition pipe (8), and an injection pipe (15). The curing agent addition pipe (8) and the injection pipe (15) are respectively connected to the feed end and the feeding end of the metering pump (7). The end of the injection pipe (15) away from the metering pump (7) extends into the inside of the vessel body (4). The metering pump (7) is fixedly installed on the base (1) and on the side close to the vessel body (4).

4. A method of using a stirred reactor for an epoxy-based wood primer, wherein the stirred reactor for the epoxy-based wood primer as described in any one of claims 1-3 is used, characterized in that... Includes the following steps: S1: First, inject the basic raw material of epoxy wood primer into the vessel (4) through the raw material addition pipe (3) on one side of the vessel (4), start the motor (10), the motor (10) drives the rotating shaft (17) to rotate, and the dispersing blades (13) below the outside of the rotating shaft (17) begin to initially stir and disperse the material in the lower part of the vessel (4). S2: During the stirring process, additives or curing agents are quantitatively added to the reactor through an addition mechanism located on one side inside the reactor body (4). As the rotating shaft (17) rotates, the lower protrusion (23) fixedly installed on the outside of the rotating shaft (17) rotates accordingly. The lower protrusion (23) rotates smoothly under the support of the rotating parts. At the same time, the pushing, cutting and extruding parts on both sides inside the lower protrusion (23) push and cut the reaction liquid surface during the rotation process, accelerating the mixing and reaction efficiency of the materials. S3: During the reaction process, the material is driven by the rotating shaft (17) and circulated through the filter conveying mechanism to remove incompletely dispersed particles, ensuring the fineness of the paint. The filtered material is then returned to the inside of the kettle (4) to participate in the reaction. S4: According to the process requirements, turn on the heating mechanism to heat the inside of the reactor body (4). The heat preservation jacket (2) is used to maintain the temperature inside the reactor and ensure that the epoxy resin reacts and crosslinks fully at a suitable temperature. S5: After the reaction is completed, the finished paint is discharged through the discharge pipe (6) installed on the front side of the inside of the kettle body (4) and enters the next process or packaging stage.

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