Multi-stage stirring compound production mixing device and process

Abstract

The present invention relates to the technical field of compound production, particularly to a multi-stage stirring compound production mixing device and process, the multi-stage stirring compound production mixing device comprises a mixing tank, a mixing cavity is formed in the mixing tank, a material inlet pipe adopts a converging structure of a branch pipe and a main pipe, the mixing structure is an inner-outer double-layer structure, and the mixing structure is driven by a central pipe to rotate in the mixing cavity; a plurality of eccentric annular plate wall holes are distributed in the inner wall face and the outer wall face of the mixing structure, and due to the eccentric structure of the annular plate wall holes, unexpected leakage caused by self weight of materials is restrained, and meanwhile the throwing-out speed difference of the materials is increased. Primary stirring is achieved through a branch pipe and main pipe confluence structure of the feeding pipe, secondary shearing stirring is formed through inner and outer double-layer rotation of the mixing structure, and self-adaptive aperture adjustment of the wall holes of the annular plate is matched, the aperture is reduced during high-speed centrifugation to prevent materials from being thrown out in advance, it is ensured that the materials are fully sheared in the middle-layer mixing cavity, and the aperture is increased during low-speed rotation; and the production continuity is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compound production, in particular to a multi-stage stirring compound production mixing device and process. BACKGROUND

[0002] In the field of compound production, material mixing is a key link that determines the quality and production efficiency of products, especially for multi-phase state (solid-liquid, liquid-liquid immiscible system), high viscosity (such as resin, paste, high concentration suspension) or easily agglomerated material (such as nano powder, pigment particles), which needs to be uniformly dispersed by high-efficiency mixing equipment to ensure sufficient reaction and stable product performance; When dealing with materials containing highly dispersed solid particles, multi-phase stratified system or requiring high product purity, the traditional single stirring mixing process gradually exposes obvious limitations. Specifically, for the mixing system of nano-sized solid particles and liquid, particles are easy to form stable agglomerates due to van der Waals force, and it is difficult to disperse them completely by relying solely on the shearing force of the stirring paddle, resulting in uneven particle concentration in the mixed system, which directly affects the reaction rate and product uniformity. Therefore, the existing compound production mixing device is mostly a multi-stage mixing structure combining mechanical stirring and centrifugal mixing. In the mixing process, if the mixing time is to be shortened, the centrifugal speed needs to be increased. However, the strong centrifugal force generated by high-speed rotation will cause the material that has not been completely dispersed to be thrown out of the centrifugal chamber in advance, resulting in the need to process substandard materials in the subsequent mixing process, ultimately causing uneven composition of the product in some areas. In addition, if the side hole diameter is reduced to avoid the material being thrown out in advance, the poor flowability of the material will cause the material to accumulate and block in the chamber, affecting the continuity of production. Moreover, the side holes of the existing centrifugal mixing chamber are mostly radial straight holes or horizontally arranged, which not only makes the material easily flow out due to gravity, causing the insufficiently mixed material to enter the outer mixing chamber in advance, but also leads to single direction of material throwing out and regular flow path, limiting the effect of secondary mixing and further exacerbating the problem of uneven mixing of the product. Therefore, there is an urgent need for a multi-stage stirring compound production mixing device and process to solve the above problems. SUMMARY

[0003] The present application provides a multi-stage stirring compound production mixing device and process, which realizes the full homogenization of the material in the mixing chamber through the multi-stage synergistic effect of the flow pre-mixing of the inlet pipe, the rotational shearing and turbulence stirring of the mixing structure, the self-adaptive adjustment of the ring plate wall hole and the eccentric configuration design, so as to solve the problems raised in the background art, i.e. Traditional single stirring mixing process has limitations in processing materials containing highly dispersed solid particles, multi-phase stratified system or high purity requirements. The multi-stage structure combining mechanical stirring and centrifugal mixing also has problems of incomplete material dispersion, early ejection, accumulation and blockage, and uneven mixing due to the centrifugal speed and side hole design, affecting the production effect and continuity.

[0004] To achieve the above purpose, one of the purposes of the present application is to provide a multi-stage stirring compound production mixing device, comprising a mixing tank, a cover body is installed on the top of the mixing tank, a mixing cavity is formed in the inside of the mixing tank, and the bottom of the inside of the mixing cavity is connected to a discharge pipe; A feeding pipe is arranged on the surface of the cover body, which adopts a confluence structure of branch pipes and a main pipe to realize primary premixing of compound raw materials. The inside of the cover body is provided with a driving structure, which includes a central pipe, the bottom end of the central pipe extends into the inside of the mixing cavity, and the bottom of the central pipe is connected to a mixing structure. The mixing structure separates the mixing cavity into a middle layer mixing cavity and an outer layer mixing cavity. The mixing structure is an inner and outer double-layer structure, which rotates in the mixing cavity through the driving of the central pipe to complete the secondary shearing and stirring of the compound mixture. The inner and outer double-layer walls of the mixing structure are both provided with a plurality of eccentric ring plate wall holes, which realize self-adaptive dynamic adjustment of the hole diameter during the secondary stirring of the compound. The eccentric configuration of the ring plate wall holes increases the speed difference of the material ejection while inhibiting the unintended leakage of the material due to its own weight.

[0005] In the above technical solution, the confluence structure of branch pipes and a main pipe of the feeding pipe realizes primary premixing, laying a foundation for subsequent mixing. The inner and outer double-layer design of the mixing structure cooperates with the driving of the central pipe to enable the material to be subjected to secondary shearing and stirring through rotational motion, enhancing the mixing effect. The eccentric ring plate wall holes can realize self-adaptive dynamic adjustment of the hole diameter, avoiding the early ejection of the insufficiently mixed material, while inhibiting the unintended leakage of the material due to its own weight. The eccentric configuration can also increase the speed difference of the material ejection, improving the uniformity of mixing, thereby effectively solving the limitations of traditional single stirring mixing process.

[0006] On this basis, a plurality of disturbance plates are fixedly installed on the outer surface of the extension plate connected to the inner ring plate. A plurality of communication holes are formed on the surface of the extension plate, and the communication holes are located between adjacent disturbance plates. The communication holes realize the communication between the outer mixing cavity and the bottom cavity. The disturbance plates rotate with the inner ring plate, disturbing the material in the outer mixing cavity, changing the flow state of the material, enhancing the mixing effect, and improving the uniformity. The communication holes are located between adjacent disturbance plates, receiving the disturbed material, communicating the outer mixing cavity and the bottom cavity, making the material enter the bottom cavity for temporary storage smoothly, avoiding accumulation, ensuring production continuity, and solving the limitations of traditional process.

[0007] In addition, the outer ring plate wall hole is provided on the surface of the outer ring plate, and the center point height of the outer ring plate wall hole is higher than that of the corresponding center point of the inner ring plate wall hole, the outer ring plate wall hole and the inner ring plate wall hole can form an aligned communication structure, and the center point offset angle of the outer ring plate wall hole and the inner ring plate wall hole is 10-20 degrees.

[0008] The second object of the present application is to provide a compound production mixing process using the multi-stage stirring compound production mixing device. S1, the compound raw materials are respectively introduced into the sub-pipes of the inlet pipe, the raw materials are introduced into the total pipe through the sub-pipe convergence structure, and after primary premixing, the materials enter the mixing cavity; S2, the driving part of the driving structure is started, the driving part drives the center pipe to rotate, and the center pipe drives the inner ring plate to rotate in the mixing cavity, and the materials in the middle layer mixing cavity are subjected to secondary shear stirring; S3, in the process of secondary shear stirring, the ring plate wall hole realizes self-adaptive dynamic adjustment of the hole diameter with the rotation of the inner ring plate, that is, the hole diameter becomes smaller at high speed centrifugation to ensure the mixing time and precision; the hole diameter increases when the inner ring plate rotates at low speed to ensure the continuity of production; the materials enter the outer mixing cavity from the middle mixing cavity through the ring plate wall hole under the action of centrifugal force, and the eccentric structure of the ring plate wall hole inhibits the unintended leakage of the materials and increases the speed difference of the materials thrown out; S4, the materials entering the outer mixing cavity are further disturbed and mixed under the action of the disturbance plate on the outer ring surface of the extension plate connected with the inner ring plate, and then enter the bottom cavity through the communication hole on the surface of the extension plate for temporary storage; S5, the mixed materials temporarily stored in the bottom cavity are discharged through the discharge pipe at the bottom of the mixing cavity, and the compound production mixing process is completed.

[0009] Compared with the prior art, the scheme realizes efficient and uniform mixing of difficult-to-mix materials through multi-stage cooperation of inlet pipe convergence premixing, mixing structure rotation shearing and disturbance plate disturbance stirring without relying on the limit performance of single stirring or centrifugal equipment, solves the problems of early throwing out of materials, insufficient mixing and easy blocking in the traditional device, and improves the continuity of compound production and the stability of product quality; Specifically, the primary stirring is realized through the sub-pipe and total pipe convergence structure of the inlet pipe, the raw materials are preliminarily homogenized, the secondary shear stirring is formed by the rotation of the inner and outer double layers of the mixing structure, and the self-adaptive hole diameter adjustment of the ring plate wall hole is cooperated: the hole diameter is reduced at high speed centrifugation to prevent the materials from being thrown out early, and the materials are ensured to be sufficiently sheared in the middle mixing cavity; the hole diameter increases when rotating at low speed to ensure the continuity of production; In addition, the eccentric configuration of the ring plate wall hole brings material speed difference, which makes the material entering the outer layer mixing cavity form turbulent flow state, so that the materials in different positions and states can fully collide and mix. For high viscosity materials, the local agglomeration caused by cohesion can be broken, and each component can be uniformly distributed. For multi-phase materials, phase separation caused by single flow path can be reduced, and solid-liquid, liquid-liquid and other multi-phase systems can be fully mixed, further improving the mixing effect in the production process. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the exploded structure of the mixing tank of the present application; Figure 3 is a schematic diagram of the driving structure of the present application; Figure 4 is a schematic diagram of the overall cut structure of the present application; Figure 5 is a schematic diagram of the internal structure of the mixing cavity of the present application; Figure 6 is a schematic diagram of the mixing structure cut of the present application; Figure 7 is a schematic diagram of the structure of A of the present application; Figure 6 Figure 8 is a schematic diagram of the cut of the ring plate wall hole of the present application; Figure 9 is a schematic diagram of the adjusting structure of the ring plate wall hole of the present application; Figure 10 is a schematic diagram of the inlet pipe structure of the present application.

[0011] The meanings of the various reference numerals in the drawings are as follows: 1, mixing tank; 11, cover body; 12, mixing cavity; 13, discharging pipe; 14, inlet pipe; 141, branch pipe; 142, main pipe; 121, middle layer mixing cavity; 122, outer layer mixing cavity; 123, bottom cavity; 2, driving structure; 21, driving member; 22, center pipe; 23, bent connecting rod; 3, mixing structure; 31, outer layer ring plate; 32, inner layer ring plate; 33, extension plate; 34, communication hole; 35, ring plate wall hole; 36, baffle plate; 4, support plate; 41, side cavity; 42, cover plate. DETAILED DESCRIPTION

[0012] ​With reference to the drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application.

[0013] Embodiment 1: see Figures 1-3 As shown in the figure, the embodiment aims to provide a multi-stage stirring compound production mixing device, which comprises a mixing tank 1, a cover 11 is installed on the top of the mixing tank 1, a mixing cavity 12 is formed in the inside of the mixing tank 1, and the inner cavity bottom of the mixing cavity 12 is connected with a discharging pipe 13; A feeding pipe 14 is arranged on the surface of the cover 11, and a confluence structure of a branch pipe 141 and a main pipe 142 is adopted to realize primary premixing of compound raw materials, a driving structure 2 is arranged in the inside of the cover 11, which comprises a central pipe 22, the bottom end of the central pipe 22 extends to the inside of the mixing cavity 12, and a mixing structure 3 is connected to the bottom of the central pipe 22, which divides the mixing cavity 12 into a middle mixing cavity 121 and an outer mixing cavity 122; The mixing structure 3 is an inner-outer double-layer structure, which rotates in the mixing cavity 12 by the driving of the central pipe 22 to complete secondary shearing and stirring of the compound mixed materials; The inner-outer double-layer wall surfaces of the mixing structure 3 are both distributed with a plurality of eccentric ring plate wall holes 35, which realize self-adaptive dynamic adjustment of the hole diameters during the secondary stirring of the compound, and the eccentric configuration of the ring plate wall holes 35 increases the speed difference of material throwing while inhibiting unexpected leakage of materials due to self-weight.

[0014] As Figure 10 shown, the feeding pipe 14 is composed of a plurality of branch pipes 141 and a main pipe 142 to form a confluence structure, when different raw materials converge in the main pipe 142, a preliminary mixing effect is generated due to the intersection of flow directions and the interaction of flow rates, which enables the originally independent raw materials to be preliminarily fused, and after the preliminarily fused materials enter the mixing cavity 12, they flow into the middle mixing cavity 121 for secondary mixing, and the secondary mixing process needs to be driven by the driving structure 2, the specific structure of the driving structure 2 will be disclosed below, the driving structure 2 further comprises a driving part 21 fixedly installed on the top of the cover 11, the output shaft of the driving part 21 is coaxially connected with the top end of the central pipe 22, the lower end of the central pipe 22 is hollow, and the bottom of the central pipe 22 is fixedly installed with a bent connecting rod 23.

[0015] Referring to Figure 3 and combining Figure 4It can be seen that the driving member 21 is composed of a frame body and a motor, the frame body is fixedly installed on the top of the cover body 11, the motor is fixedly installed on the surface of the frame body, the output shaft of the motor is coaxially connected with the top end of the central pipe 22, the lower end of the central pipe 22 is internally hollow, and the bottom is fixedly installed with the bent connecting rod 23. When the material enters the middle mixing cavity 121 for secondary mixing, the motor is started, the rotating movement of the output shaft of the motor is transmitted to the central pipe 22 through the coaxial connection, the central pipe 22 rotates, and the bottom of the bent connecting rod 23 rotates synchronously, thereby providing power for the rotation of the mixing structure 3 in the middle mixing cavity 121, and the material forms continuous shearing and stirring action.

[0016] Secondly, the specific structure of the mixing structure 3 is disclosed, the mixing structure 3 includes an outer ring plate 31 and an inner ring plate 32 in a sleeved mounting structure, and the upper end outer wall of the outer ring plate 31 and the lower end outer wall of the inner ring plate 32 are fixedly installed with an extension plate 33; Among them, the outer wall of the extension plate 33 connected with the outer ring plate 31 is fixedly connected with the inner wall of the mixing cavity 12, and the extension plate 33 connected with the inner ring plate 32 has a predetermined gap with the inner wall of the mixing cavity 12, forming a non-contact assembly structure; The middle mixing cavity 121 is located in the enclosed space of the inner ring plate 32, the outer mixing cavity 122 is located between the outer ring plate 31 and the inner wall of the mixing cavity 12, the extension plate 33 connected with the surface of the inner ring plate 32 and the bottom of the inner cavity of the mixing cavity 12 form a bottom cavity 123 for temporarily storing the mixed material, and the bottom of the bent connecting rod 23 is fixedly connected with the bottom of the inner cavity of the middle mixing cavity 121.

[0017] As shown in Figure 4 It can be seen that the outer ring plate 31 and the inner ring plate 32 in the mixing structure 3 are assembled in a sleeved manner, the inner ring plate 32 is located inside the outer ring plate 31, this assembly manner enables the two ring plates to cooperate with each other, the outer ring plate 31 can act as a fixed barrier, and the inner ring plate 32 can relatively move inside it, thereby providing a structural basis for subsequent material mixing and cavity separation, referring to Figure 5 and combining with Figure 9 It can be seen that the upper end outer wall of the outer ring plate 31 and the lower end outer wall of the inner ring plate 32 are both provided with the extension plate 33, and the extension plate 33 provides a support and a connection point for the outer ring plate 31; Specifically, the outer wall of the extension plate 33 connected with the outer ring plate 31 is fixedly connected with the inner wall of the mixing cavity 12, and this fixed connection enables the outer ring plate 31 to remain stable during the mixing process and not to be displaced due to the flow of the material or the movement of other components, thereby ensuring the spatial stability of the outer mixing cavity 122 and providing a stable environment for the further mixing of the material therein; The extension plate 33 connected with the inner ring plate 32 is connected with the bottom of the inner ring plate 32, cooperates with the inner ring plate 32 to form the middle mixing cavity 121, and referring toFigure 4 The outer wall of the extension plate 33 connected with the inner ring plate 32 leaves a preset gap with the inner wall of the mixing cavity 12, forming a non-contact assembly, which reduces the friction resistance between the inner ring plate 32 and the inner wall of the mixing cavity 12 when the inner ring plate 32 rotates, making the rotation of the inner ring plate 32 more smooth; The middle mixing cavity 121 enclosed by the inner ring plate 32 provides space for the secondary mixing of the material. After the primary premixed material enters the middle mixing cavity 121 enclosed by the inner ring plate 32, the motor drives the central tube 22 to rotate, the bent connecting rod 23 fixedly connected with the bottom of the central tube 22 rotates, and then drives the inner ring plate 32 to rotate in the middle mixing cavity 121. The rotation of the inner ring plate 32 forms a shearing force on the material in the cavity, so that the material is continuously sheared and stirred in the relatively closed middle mixing cavity 121, and the secondary mixing is completed. The outer mixing cavity 122 is formed between the outer ring plate 31 and the inner wall of the mixing cavity 12, which serves as a further mixing space for the material after secondary mixing, and receives the material flowing out of the inner ring plate 32, so that the material can continue to mix and react, improving the uniformity of the mixing.

[0018] It should be noted that the self-adaptive aperture adjustment of the matching ring plate wall hole 35 is based on the dynamic change of the actual flow aperture formed by the fitting time change of the ring plate wall hole 35 on the inner ring plate 32 and the ring plate wall hole 35 on the outer ring plate 31 during relative rotation. When rotating at high speed, the inner ring plate 32 rotates at a high speed, which makes the relative motion speed between the ring plate wall hole 35 on the inner ring plate 32 and the corresponding ring plate wall hole 35 on the outer ring plate 31 faster, and the time for the two to fit and align becomes shorter. During this short fitting time, the effective aperture for the material to pass through is equivalent to being "reduced". This state can effectively prevent the material that has not completed sufficient shearing in the middle mixing cavity 121 from being thrown out of the ring plate wall hole 35 in advance, thereby ensuring that the material has enough time to receive shearing and stirring in the middle mixing cavity 121 and ensuring the effect of secondary mixing. When the material is mixed in the middle mixing cavity 121, the rotation speed of the inner ring plate 32 is reduced, the relative motion speed between the ring plate wall hole 35 on the inner ring plate 32 and the ring plate wall hole 35 on the outer ring plate 31 slows down, and the time for the two to fit and align increases. At this time, the effective aperture for the material to pass through the ring plate wall hole 35 is equivalent to being "increased". The material that has been sufficiently sheared and mixed can smoothly pass through the aligned ring plate wall hole 35 from the middle mixing cavity 121 of the inner ring plate 32 to the outer mixing cavity 122 between the outer ring plate 31 and the inner wall of the mixing cavity 12, preparing for subsequent re-mixing. By adjusting the rotation speed of the inner ring plate 32 to change the fitting time of the ring plate wall hole 35, the self-adaptive adjustment of the aperture is realized, which not only ensures the sufficient mixing of the material in the middle mixing cavity 121, but also allows the mixed material to enter the next step in time, reducing the problem of material retention or poor transportation and ensuring the continuity of the entire production process.

[0019] The extension plate 33 of the inner ring plate 32 and the bottom of the mixing cavity 12 form a bottom cavity 123 for temporarily storing materials, as shown in Figure 4 The existence of the bottom cavity 123 provides a temporary storage space for the mixed materials, avoids the problem of insufficient mixing caused by direct discharge of materials during mixing, and facilitates subsequent unified collection and processing of the materials.

[0020] The outer ring surface of the extension plate 33 connected to the inner ring plate 32 is fixedly installed with a plurality of disturbance plates 36, and the surface of the extension plate 33 is provided with a plurality of communication holes 34, and the plurality of communication holes 34 are located between adjacent disturbance plates 36. The communication holes 34 realize the communication between the outer mixing cavity 122 and the bottom cavity 123, and the plurality of disturbance plates 36 are inclined in the same direction.

[0021] Referring to Figure 3 and Figure 6 The outer ring surface of the extension plate 33 connected to the inner ring plate 32 is fixedly installed with a plurality of disturbance plates 36, and the surface of the extension plate 33 is provided with a plurality of communication holes 34, and the plurality of communication holes 34 are located between adjacent disturbance plates 36. The communication holes 34 realize the communication between the outer mixing cavity 122 and the bottom cavity 123, and the plurality of disturbance plates 36 are inclined in the same direction. The extension plate 33 is fixedly installed with a plurality of disturbance plates 36, and the surface of the extension plate 33 is provided with a plurality of communication holes 34, and the plurality of communication holes 34 are located between adjacent disturbance plates 36. The communication holes 34 realize the communication between the outer mixing cavity 122 and the bottom cavity 123, and the plurality of disturbance plates 36 are inclined in the same direction.

[0022] The ring plate wall hole 35 is provided on the surface of the outer ring plate 31, and the center point height of the ring plate wall hole 35 is higher than the center point of the corresponding ring plate wall hole 35 on the surface of the inner ring plate 32. The ring plate wall holes 35 of the outer ring plate 31 and the inner ring plate 32 can form an aligned communication structure.

[0023] Referring to Figure 7 and combining Figure 8As shown, the center point of the ring plate wall hole 35 of the outer ring plate 31 is higher than the center point of the corresponding ring plate wall hole 35 of the inner ring plate 32, forming a height difference. When the ring plate wall holes 35 of the inner and outer ring plates 31 are aligned, the material on one side of the inner ring plate 32 has a tendency to move outward under the action of centrifugal force. The height difference causes the ring plate wall hole 35 of the outer ring plate 31 to be at a relatively high position, and the material flows naturally to the low position under the action of gravity. The combined action of centrifugal force and gravity pushes the material more smoothly through the aligned ring plate wall hole 35 into the outer mixing chamber 122. Specifically, when the ring plate wall holes 35 of the inner and outer ring plates 31 are aligned, the inner ring plate 32 rotates under the action of the driving structure 2, causing the material in the middle mixing chamber 121 to be subjected to centrifugal force and have a tendency to move outward. This is the initial power for the material to move to the wall hole. At the same time, the center point of the ring plate wall hole 35 of the outer ring plate 31 is higher than that of the inner ring plate, forming a height difference that causes the outer ring plate hole to be at a relatively high position and the inner ring plate hole to be at a relatively low position. According to the characteristics of gravity, the material will naturally flow to the low position. However, the "low position" here is relative to the outer ring plate hole. After the inner material reaches the inner ring plate hole position under the action of centrifugal force, gravity will guide it to flow to the outer ring plate hole at a high position. Although the outer ring plate hole is at a high position, it is connected to the inner ring plate hole to form a communication channel. When the material moves along the channel, gravity will assist in overcoming part of the resistance. Centrifugal force provides an outward thrust, and gravity provides a guiding force along the height difference channel. The combined force effectively reduces the resistance of the material passing through the ring plate wall hole 35, thus pushing the material more smoothly into the outer mixing chamber 122. At the same time, this height difference, combined with the structural design of the ring plate wall hole 35, ensures the stability of the communication structure when aligned, avoiding material transport interruption caused by misalignment of hole diameter or inconsistent height, thus ensuring the continuity of material transport from the inner mixing chamber to the outer mixing chamber 122, providing a stable material source for subsequent mixing in the outer mixing chamber 122. The eccentric configuration of the ring plate wall hole 35 causes the material to experience different centrifugal forces at different positions when passing through the wall hole, resulting in a speed difference. This speed difference causes the material entering the outer mixing chamber 122 to no longer flow in a single direction or fixed path, but to form a turbulent flow state. For high-viscosity materials, their own cohesive force is strong, and they are prone to local agglomeration. Different speed materials collide and tear each other in a turbulent flow state, breaking the agglomeration state and allowing each component in the material to be uniformly dispersed. For solid-liquid, liquid-liquid and other multi-phase materials, when the traditional flow path is single, different phases of the material are prone to separation due to differences in density and viscosity. The turbulent flow state promotes the contact and intermingling of each phase of the material through continuous disturbance and mixing, reducing the occurrence of phase separation, and ultimately further improving the mixing effect in the production process.

[0024] The center point of the ring plate wall hole 35 of the outer layer ring plate 31 is offset from the center point of the ring plate wall hole 35 of the inner layer ring plate 32 by an angle of 10°-20°: Firstly, for common materials to be processed (viscosity of 500-5000 mPa・s), through preliminary experiments, it is obtained that: for low-viscosity materials with a viscosity of 500 mPa・s, at least 15 seconds (T1=15s) is required for completing sufficient shearing and stirring in the middle mixing chamber 121; for high-viscosity materials with a viscosity of 5000 mPa・s, the maximum allowable inflow rate corresponding to a single alignment time of no more than 40 seconds (T2=40s) does not cause accumulation after entering the outer mixing chamber 122; the conventional rotating speed of the inner layer ring plate 32 is 30-60 revolutions per minute, and for example, the angular speed is 300° / minute 5° / second; combined with the number of wall holes (for example, 6 evenly distributed), the single alignment interval is calculated as 360° / 6 ÷ 5° / second = 12 seconds; by adjusting the offset angle to change the alignment interval, it is finally obtained that the angle range meeting T1≤single alignment interval≤T2 preliminarily falls within 5°-30°; Secondly, combined with the running stability of the equipment, the rotating resistance of the inner layer ring plate 32 at six offset angles of 5°, 10°, 15°, 20°, 25° and 30° is tested for 48 hours: when the angle is 25°, the rotating resistance increases by 35% compared with 20°, the power consumption increases by 32%, and the edge wear of the ring plate wall hole is 0.12 mm; when the angle is 30°, the resistance increases by 50%, the power consumption increases by 48%, and the wear is 0.18 mm; when the angle is 5°, the wall hole aligns every 2 minutes, the pressure fluctuation amplitude is 0.08 MPa, the equipment vibration amplitude increases by 15% compared with 10°, and the loosening probability of the connecting bolt increases by 20%; therefore, the interval of 5°-10° and 20°-30° is eliminated. Finally, three angles of 10°, 15° and 20° are selected within the interval of 10°-20°, and mixing experiments are carried out on low, medium and high viscosity materials respectively: when the angle is 10°, the uniformity of low, medium and high viscosity materials is 92%, 90% and 88% respectively; when the angle is 15°, the uniformity is 93%, 92% and 90% respectively; when the angle is 20°, the uniformity is 91%, 90% and 89% respectively; the material accumulation height in the outer mixing chamber 122 at the three angles is less than 5 mm, the noise and temperature parameters during the running of the equipment are stable within the designed range, and considering the adaptability of different materials and the long-term running cost, it is determined that 10°-20° is the final offset angle range.

[0025] Since the inner layer ring plate 32 needs to rotate relative to the outer layer ring plate 31 to realize the alignment and offset of the ring plate wall hole 35, in order to ensure the stability of the rotation of the inner layer ring plate 32, the upper end surface of the inner layer ring plate 32 is fixedly installed with a support plate 4, and a side cavity 41 is formed in the inner wall of the extension plate 33 fixedly connected with the outer layer ring plate 31, and the support plate 4 is rotationally supported in the inside of the side cavity 41.

[0026] As shown in Figure 7 and Figure 8 The upper end surface of the inner ring plate 32 is fixedly installed with a support plate 4, and a side cavity 41 is formed in the inner wall of the extension plate 33 fixedly connected with the outer ring plate 31, and the support plate 4 is rotationally supported inside the side cavity 41 to form a rotary support structure, and the rotary support of the support plate 4 in the side cavity 41 can provide radial constraint for the inner ring plate 32 to improve the operation stability.

[0027] Since the top of the extension plate 33 fixedly connected with the outer ring plate 31 is in an open state, in order to enable the material to be stably mixed in the middle layer mixing cavity 121, as shown in Figure 5 The upper end inner wall of the mixing cavity 12 is fixedly installed with a cover plate 42, and the cross section of the cover plate 42 is in a bent state, and the cover plate 42 covers the top of the extension plate 33 fixedly connected with the outer ring plate 31. It can ensure that all the materials flow in the cavities of the mixing cavity 12 according to the preset path, improve the material utilization rate and mixing efficiency; at the same time, the bent cover plate 42 can make the materials splashed on its surface during stirring fall back into the middle layer mixing cavity 121, and the fixed installation mode of the cover plate 42 will not interfere with the normal operation of the inner ring plate 32, the outer ring plate 31 and other components, and the stability of the mixing process is ensured.

[0028] Working principle: First, the compound raw materials are respectively introduced into the sub-pipes 141 of the feed pipe 14, and are converged into the convergence architecture of the main pipe 142 through the sub-pipes 141, and the preliminary mixing is completed through the intersection and flow speed interaction of different raw materials in the flow direction at the time of convergence, and the preliminary fusion of the raw materials is realized; After the preliminary fusion, the material enters the mixing cavity 12 inside the mixing tank 1, and flows into the middle layer mixing cavity 121 formed by the inner ring plate 32, at this time, the driving structure 2 is started, the center pipe 22 is rotated by the motor, the bent connecting rod 23 fixedly connected with the bottom of the center pipe 22 is synchronously rotated, and then the inner ring plate 32 is rotated in the middle layer mixing cavity 121 to form a shearing force on the material, and the secondary mixing is completed; During the secondary mixing process, the eccentric ring plate wall hole 35 on the inner ring plate 32 and the outer ring plate 31 realizes self-adaptive aperture adjustment through relative rotation: when rotating at high speed, the wall hole is short in time, the effective aperture is reduced, the material is prevented from being thrown out in advance, and the sufficient shearing is ensured; after the mixing is completed, the rotation speed is reduced, the wall hole is aligned for a long time, the effective aperture is increased, and the material enters the outer mixing cavity 122 through the aligned ring plate wall hole 35 under the action of the combined force of the centrifugal force and the gravity formed by the height difference of the outer ring plate 31 wall hole; The material entering the outer mixing chamber 122 is subjected to a speed difference due to the eccentric configuration of the ring plate wall hole 35, forming a turbulent flow state, promoting the collision and blending of different state materials; at the same time, the disturbing plate 36 rotating with the inner ring plate 32 disturbs the material, completing the third mixing, and the mixed material enters the bottom chamber 123 through the communication hole 34 on the extension plate 33 for temporary storage, and finally is discharged through the discharge pipe 13 at the bottom of the mixing chamber 12. After a batch of material is mixed, the driving structure 2 and the center pipe 22 can be disassembled, so that the cover body 11 can be opened, and the mixing tank 1 can be cleaned.

[0029] It should be noted that the size and number of the ring plate wall hole 35 shown in the drawing are only schematic.

[0030] Embodiment 2: According to the content provided in Embodiment 1, the purpose is to provide a compound production mixing process, the specific steps are as follows: Step one, the compound raw materials are respectively introduced into the sub-pipes 141 of the inlet pipe 14, and the raw materials are introduced into the total pipe 142 through the sub-pipes 141, and after the primary premixing is completed, the material enters the mixing chamber 12; Step two, start the driving part 21 of the driving structure 2, the driving part 21 drives the center pipe 22 to rotate, and the center pipe 22 drives the inner ring plate 32 to rotate in the mixing chamber 12, and the material entering the middle mixing chamber 121 is subjected to secondary shearing and stirring; Step three, during the secondary shearing and stirring, the ring plate wall hole 35 realizes self-adaptive dynamic adjustment of the hole diameter, that is, the hole diameter becomes smaller at high speed centrifugation, ensuring the mixing time and precision; when the inner ring plate 32 rotates at low speed, the hole diameter increases, ensuring the production continuity, and the material enters the outer mixing chamber 122 from the middle mixing chamber 121 through the ring plate wall hole 35 under the action of centrifugal force, and the eccentric structure of the ring plate wall hole 35 inhibits the unintended leakage of the material and increases the speed difference of the material thrown out; Step four, the material entering the outer mixing chamber 122 is further disturbed and mixed under the action of the disturbing plate 36 on the outer ring surface of the extension plate 33 connected with the inner ring plate 32, and then enters the bottom chamber 123 through the communication hole 34 on the surface of the extension plate 33 for temporary storage; Step five, the mixed material temporarily stored in the bottom chamber 123 is discharged through the discharge pipe 13 at the bottom of the mixing chamber 12, and the production mixing process of the compound is completed.

[0031] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage stirring compound production mixing device, comprising a mixing tank (1) with a cover (11) mounted on the top, a mixing cavity (12) formed in the interior of the mixing tank (1), and a lower discharge pipe (13) connected to the bottom of the mixing cavity (12); an inlet pipe (14) arranged on the surface of the cover (11) and having a structure of branch pipes (141) and a main pipe (142) to realize primary premixing of compound raw materials, characterized in that: a driving structure (2) is arranged in the interior of the cover (11), comprising a central pipe (22) extending to the interior of the mixing cavity (12) at the bottom end, and a mixing structure (3) connected to the bottom of the central pipe (22), which divides the mixing cavity (12) into a middle mixing cavity (121) and an outer mixing cavity (122); the mixing structure (3) is a double-layer structure, which rotates in the mixing cavity (12) driven by the central pipe (22) to complete secondary shearing and stirring of the compound mixture; the inner and outer double-layer walls of the mixing structure (3) are provided with a plurality of eccentric ring plate wall holes (35) to realize self-adaptive dynamic adjustment of the hole diameter during secondary stirring of the compound; and the eccentric configuration of the ring plate wall holes (35) increases the speed difference of material ejection while inhibiting unintended leakage of the material due to self-weight. The driving structure (2) further comprises a driving member (21) fixedly installed on the top of the cover (11), an output shaft of the driving member (21) is coaxially connected to the top end of the central pipe (22), the lower end of the central pipe (22) is hollow, and a bent connecting rod (23) is fixedly installed at the bottom of the central pipe (22). The mixing structure (3) comprises an outer ring plate (31) and an inner ring plate (32) in a sleeved mounting structure, and an extension plate (33) is fixedly installed on the upper end outer wall of the outer ring plate (31) and the lower end outer wall of the inner ring plate (32); wherein the outer wall of the extension plate (33) connected to the outer ring plate (31) is fixedly connected to the inner wall of the mixing cavity (12), and the extension plate (33) connected to the inner ring plate (32) has a preset gap with the inner wall of the mixing cavity (12) to form a non-contact assembly structure; the middle mixing cavity (121) is located in the enclosed space of the inner ring plate (32), the outer mixing cavity (122) is located between the outer ring plate (31) and the inner wall of the mixing cavity (12), the extension plate (33) connected to the surface of the inner ring plate (32) and the bottom of the inner cavity of the mixing cavity (12) form a bottom cavity (123) for temporarily storing the mixed material, and the bottom of the bent connecting rod (23) is fixedly connected to the bottom of the inner cavity of the middle mixing cavity (121).

2. The multi-stage agitated compound production mixing apparatus according to claim 1, characterized by: A plurality of disturbance plates (36) are fixedly installed on the outer ring surface of the extension plate (33) connected to the inner ring plate (32), a plurality of communication holes (34) are formed in the surface of the extension plate (33), the plurality of communication holes (34) are located between adjacent disturbance plates (36), and the communication holes (34) realize communication between the outer mixing cavity (122) and the bottom cavity (123).

3. The multi-stage agitated compound production mixing apparatus according to claim 2, characterized by: ​ ​ ​ 4. The multi-stage agitated compound production mixing apparatus according to claim 3, characterized by: ​ 5. The multi-stage agitated compound production mixing apparatus according to claim 4, characterized by: The outer ring plate (31) is provided with a ring plate wall hole (35) on the surface, and the center point of the ring plate wall hole (35) is higher than the center point of the corresponding ring plate wall hole (35) on the surface of the inner ring plate (32). The ring plate wall hole (35) of the outer ring plate (31) and the ring plate wall hole (35) of the inner ring plate (32) can form an aligned communication structure.

6. The multi-stage agitated compound production mixing apparatus according to claim 5, characterized by: The center point of the ring plate wall hole (35) of the outer ring plate (31) and the ring plate wall hole (35) of the inner ring plate (32) is offset by an angle of 10°-20°.

7. The multi-stage agitated compound production mixing apparatus according to claim 6, characterized by: The upper end surface of the inner ring plate (32) is fixedly provided with a support plate (4), and the inner wall of an extension plate (33) fixedly connected with the outer ring plate (31) is provided with a side cavity (41). The support plate (4) is rotationally supported in the side cavity (41).

8. The multi-stage agitated compound production mixing apparatus according to claim 4, characterized by: A plurality of baffles (36) are inclined in the same direction.

9. The multi-stage agitated compound production mixing apparatus according to claim 3, characterized by: The upper end inner wall of the mixing cavity (12) is fixedly provided with a cover plate (42). The cover plate (42) is in a bent state in cross section, and covers the top of the extension plate (33) fixedly connected with the outer ring plate (31).

10. A compound production hybrid process characterized by, The multi-stage stirring compound production mixing device of claim 7 comprises the following method steps: S1, compound raw materials are respectively introduced into the branch pipes (141) of the feed pipe (14), and the raw materials are introduced into the collecting structure of the main pipe (142) through the branch pipes (141). After primary premixing, the materials enter the mixing cavity (12); S2, the driving member (21) of the driving structure (2) is started, the driving member (21) drives the central pipe (22) to rotate, and the central pipe (22) drives the inner ring plate (32) to rotate in the mixing cavity (12), so as to perform secondary shearing and stirring on the materials entering the middle mixing cavity (121); S3, during the secondary shearing and stirring, the ring plate wall hole (35) realizes self-adaptive dynamic adjustment of the hole diameter with the rotation of the inner ring plate (32), that is, the hole diameter becomes smaller at high speed centrifugation to ensure the mixing time and precision; the hole diameter increases when the inner ring plate (32) rotates at low speed to ensure the continuity of production. The materials enter the outer mixing cavity (122) from the middle mixing cavity (121) under the action of the centrifugal force, and the eccentric structure of the ring plate wall hole (35) inhibits the unintended leakage of the materials and increases the speed difference of the materials thrown out; S4, the materials entering the outer mixing cavity (122) are further disturbed and mixed under the action of the baffles (36) on the outer ring surface of the extension plate (33) connected with the inner ring plate (32), and then enter the bottom cavity (123) through the communication holes (34) on the surface of the extension plate (33) for temporary storage; S5, the mixed materials temporarily stored in the bottom cavity (123) are discharged through the discharge pipe (13) at the bottom of the mixing cavity (12), and the production mixing process of the compound is completed.

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