A multi-stage agitated compound production mixing apparatus and process

Abstract

The present application relates to the technical field of compound production, in particular to a multi-stage stirring compound production mixing device and process, comprising a mixing tank, a mixing cavity is formed in the mixing tank, a branch pipe and a main pipe are used in the flow convergence architecture of the feeding pipe, the mixing structure is a double-layer structure, the center pipe is driven to rotate in the mixing cavity, the inner and outer double-layer walls of the mixing structure are distributed with a plurality of eccentric ring plate wall holes, the eccentric configuration of the ring plate wall hole can inhibit the unexpected leakage of the material due to gravity, and increase the speed difference of the material throwing out. The initial stirring is realized by the flow convergence architecture of the branch pipe and the main pipe of the feeding pipe, the secondary shear stirring is formed by the inner and outer double-layer rotation of the mixing structure, and the self-adaptive aperture adjustment of the ring plate wall hole is matched: the aperture is reduced to prevent the material from throwing out in advance when the centrifugal speed is high, the material is fully sheared in the middle layer mixing cavity, and the aperture is increased when the rotation speed is low, so that 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 the product, especially for multi-phase (solid-liquid, liquid-liquid immiscible system), high viscosity (such as resin, paste, high concentration suspension) or easily agglomerated materials (such as nano powder, pigment particles), which need to be uniformly dispersed by high-efficiency mixing equipment to ensure sufficient reaction and stable product performance.

[0003] When dealing with materials containing highly dispersed solid particles, multi-phase layered systems 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 prone 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 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.

[0004] Furthermore, the side holes of the existing centrifugal mixing chamber are radial straight holes or horizontally arranged, which not only makes the material easily flow out due to gravity, causing the incompletely mixed material to enter the outer mixing chamber in advance, but also leads to a single direction of material ejection and a regular flow path, limiting the effect of secondary mixing and further exacerbating the problem of uneven mixing of the product.

[0005] Therefore, there is an urgent need for a multi-stage stirring compound production mixing device and process to solve the above problems. SUMMARY

[0006] 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.:

[0007] 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 of mechanical stirring combined with 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, which affects the production effect and continuity.

[0008] To achieve the above-mentioned 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;

[0009] 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. A driving structure is arranged in the inside of the cover body, which comprises a central pipe, the bottom end of the central pipe extends to 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 a double-layer structure, and the central pipe is driven to rotate in the mixing cavity to complete secondary shearing and stirring of the compound material.

[0010] The inner and outer double-layer walls of the mixing structure are both provided with a plurality of eccentric ring plate wall holes. The ring plate wall holes are in an eccentric configuration, which can suppress unintended leakage of the material due to its own weight, and increase the speed difference of the material ejection.

[0011] In the above technical solution, the confluence structure of branch pipes and a main pipe of the feeding pipe is adopted to realize primary premixing, which lays a foundation for subsequent mixing. The 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, thereby enhancing the mixing effect. The eccentric ring plate wall holes can realize self-adaptive dynamic adjustment of the hole diameter, avoid the material that has not been fully mixed from being ejected too early, suppress unintended leakage of the material due to its own weight, and increase the speed difference of the material ejection through the eccentric configuration, thereby improving the uniformity of mixing and effectively solving the limitations of the traditional single stirring mixing process.

[0012] 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 in 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 layer mixing cavity and the bottom cavity. The disturbance plates rotate with the inner ring plate, disturb the material in the outer layer mixing cavity, change the flow state of the material, enhance the mixing effect, and improve the uniformity. The communication holes are located between adjacent disturbance plates, receive the disturbed material, communicate the outer layer mixing cavity and the bottom cavity, make the material enter the bottom cavity for temporary storage smoothly, avoid accumulation, ensure the continuity of production, and solve the limitations of the traditional process.

[0013] In addition, the outer ring plate wall hole is provided with a center point, and the center point of the outer ring plate wall hole is higher than the center point of the corresponding ring plate wall hole on the inner ring plate surface, the ring plate wall holes of the outer ring plate and the inner ring plate can form an aligned communication structure, and the center point of the ring plate wall hole of the outer ring plate is offset from the center point of the ring plate wall hole of the inner ring plate by an angle of 10-20 degrees.

[0014] The second object of the present application is to provide a compound production mixing process using the multi-stage stirring compound production mixing device.

[0015] S1, the compound raw materials are respectively introduced into the branch pipes of the inlet pipe, the raw materials are introduced into the total pipe through the branch pipe, and after primary premixing, the materials enter the mixing cavity;

[0016] S2, the driving part of the driving structure is started, the driving part drives the center pipe to rotate, 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;

[0017] S3, in the process of secondary shear stirring, the ring plate wall hole realizes self-adaptive dynamic adjustment of the aperture with the rotation of the inner ring plate, that is, the aperture becomes smaller at high speed centrifugation to ensure the mixing time and precision; the aperture 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;

[0018] 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;

[0019] 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.

[0020] Compared with the prior art, the scheme realizes efficient and uniform mixing of difficult-to-mix materials through multi-stage cooperation of inlet pipe flow premixing, rotating shear of the mixing structure and disturbance stirring of the disturbance plate, 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;

[0021] Specifically, the primary stirring is realized through the branch pipe and the total pipe flow 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 aperture adjustment of the ring plate wall hole is cooperated: the aperture is reduced at high speed centrifugation to prevent the materials from being thrown out early, ensure that the materials are sufficiently sheared in the middle mixing cavity, and the aperture is increased when rotating at low speed to ensure the continuity of production;

[0022] In addition, the eccentric configuration of the ring plate wall hole brings the material speed difference, which makes the material entering the outer layer mixing cavity form a turbulent flow state, which enables the materials at different positions and states to fully collide and blend. For high viscosity materials, the local agglomeration caused by cohesion can be broken, and each component is 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 are fully mixed, further improving the mixing effect in the production process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the application;

[0024] Figure 2 It is a schematic diagram of the exploded structure of the mixing tank of the application;

[0025] Figure 3 It is a schematic diagram of the driving structure of the application;

[0026] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the application;

[0027] Figure 5 It is an internal structure diagram of the mixing cavity of the application;

[0028] Figure 6 It is a schematic diagram of the mixing structure of the application;

[0029] Figure 7 It is a schematic diagram of the structure of A of the application; Figure 6

[0030] Figure 8 It is a schematic diagram of the cross-section of the ring plate wall hole of the application;

[0031] Figure 9 It is a schematic diagram of the adjusting structure of the ring plate wall hole of the application;

[0032] Figure 10 It is a schematic diagram of the inlet pipe structure of the application.

[0033] The meanings of the various reference numbers in the drawings are as follows:

[0034] 1, mixing tank; 11, cover body; 12, mixing cavity; 13, discharge pipe; 14, inlet pipe; 141, branch pipe; 142, main pipe; 121, middle layer mixing cavity; 122, outer layer mixing cavity; 123, bottom cavity;

[0035] 2, driving structure; 21, driving member; 22, center pipe; 23, bent connecting rod;

[0036] 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;​

[0037] 4, support plate; 41, side cavity; 42, cover plate. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] Embodiment 1: please refer to Figures 1-3 As shown in the figure, the embodiment is aimed to provide a multi-stage stirring compound production mixing device, which comprises a mixing tank 1, a cover body 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;

[0040] An inlet pipe 14 is arranged on the surface of the cover body 11, which adopts a confluence structure of branch pipes 141 and a main pipe 142 to realize the primary premixing of compound raw materials, and a driving structure 2 is arranged in the inside of the cover body 11, which comprises a center pipe 22, the bottom end of the center pipe 22 extends to the inside of the mixing cavity 12, and the bottom of the center pipe 22 is connected with a mixing structure 3, which divides the mixing cavity 12 into a middle layer mixing cavity 121 and an outer layer mixing cavity 122;

[0041] The mixing structure 3 is an inner-outer double-layer structure, which rotates in the mixing cavity 12 through the driving of the center pipe 22 to complete the secondary shearing stirring of the compound mixing materials;

[0042] The inner-outer double-layer wall surfaces of the mixing structure 3 are both distributed with several eccentric ring plate wall holes 35, which realize the 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 the material throwing while inhibiting the unexpected leakage of the material due to the self-weight.

[0043] As Figure 10As shown, the inlet pipe 14 is composed of a plurality of branch pipes 141 and a main pipe 142 in a converging 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 allows the originally independent raw materials to be preliminarily fused. After the preliminarily fused materials enter the mixing chamber 12, they flow into the middle mixing chamber 121 for secondary mixing, and the secondary mixing process is driven by the driving structure 2. The specific structure of the driving structure 2 is disclosed below. The driving structure 2 further includes a driving member 21 fixedly installed at the top of the cover body 11, and the output shaft of the driving member 21 is coaxially connected to the top end of a central pipe 22. The lower end of the central pipe 22 is internally hollow, and the bottom of the central pipe 22 is fixedly installed with a bent connecting rod 23.

[0044] Referring to Figure 3 and in combination with Figure 4 It can be seen that the driving member 21 is composed of a frame body and a motor. The frame body is fixedly installed at the top of the cover body 11, and the motor is fixedly installed on the surface of the frame body. The output shaft of the motor is coaxially connected to the top end of the central pipe 22. The lower end of the central pipe 22 is internally hollow, and the bottom of the central pipe 22 is fixedly installed with a bent connecting rod 23. When the materials enter the middle mixing chamber 121 for secondary mixing, the motor is started, and the rotational movement of the output shaft of the motor is transmitted to the central pipe 22 through coaxial connection, so that the central pipe 22 rotates, and in turn drives the bent connecting rod 23 at the bottom to rotate synchronously, thereby providing power for the rotation of the mixing structure 3 in the middle mixing chamber 121, and the materials form a continuous shearing and stirring effect.

[0045] 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 installation structure. 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 fixedly installed with an extension plate 33.

[0046] 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 chamber 12, and the extension plate 33 connected with the inner ring plate 32 has a predetermined gap with the inner wall of the mixing chamber 12, forming a non-contact assembly structure.

[0047] The middle mixing chamber 121 is located in the enclosed space of the inner ring plate 32, and the outer mixing chamber 122 is located between the outer ring plate 31 and the inner wall of the mixing chamber 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 chamber 12 form a bottom cavity 123 for temporarily storing the mixed materials. The bottom of the bent connecting rod 23 is fixedly connected to the inner cavity bottom of the middle mixing chamber 121.

[0048] As Figure 4As shown, the outer ring plate 31 in the mixing structure 3 is assembled with the inner ring plate 32 in a sleeved manner, and 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 serve as a fixed barrier, and the inner ring plate 32 can move relatively inside it, thereby providing a structural basis for subsequent material mixing and cavity separation. See Figure 5 In combination with Figure 9 As can be seen, the outer wall of the upper end of the outer ring plate 31 and the outer wall of the lower end of the inner ring plate 32 are both provided with an extension plate 33, which provides a support and connection point for the outer ring plate 31.

[0049] Specifically, the outer wall of the extension plate 33 connected to the outer ring plate 31 is fixed to the inner wall of the mixing cavity 12. This fixed connection enables the outer ring plate 31 to remain stable during the mixing process and not to be displaced by the flow of materials 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 materials.

[0050] The extension plate 33 connected to the inner ring plate 32 is connected to the bottom of the inner ring plate 32 and cooperates with the inner ring plate 32 to form the middle mixing cavity 121. See Figure 4 The outer wall of the extension plate 33 connected to the inner ring plate 32 is provided with a predetermined gap from the inner wall of the mixing cavity 12, forming a non-contact assembly. This assembly manner reduces the frictional 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.

[0051] The middle mixing cavity 121 formed by the inner ring plate 32 provides a space for the secondary mixing of materials. After the preliminarily mixed materials enter the middle mixing cavity 121 formed by the inner ring plate 32, the motor drives the center tube 22 to rotate, the bent connecting rod 23 fixedly connected to the bottom of the center 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 materials in the cavity, so that the materials are 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 materials after the secondary mixing, receives the materials flowing out of the inner ring plate 32, and enables the materials to continue the mixing reaction, thereby improving the uniformity of the mixing.

[0052] It should be noted that the adaptive hole size adjustment of the matching ring plate wall hole 35 is the core of the dynamic change of the actual flow aperture formed by the fitting time change of the ring plate wall hole 35 on the inner layer ring plate 32 and the outer layer ring plate 31 during relative rotation. When rotating at high speed, the inner layer ring plate 32 rotates faster, which makes the relative motion speed between the ring plate wall hole 35 on the inner layer ring plate 32 and the corresponding ring plate wall hole 35 on the outer layer ring plate 31 faster, and the time for the two to fit and align becomes shorter. In this short fitting time, the effective aperture for the material to pass through is equivalent to being "reduced", which effectively prevents the material that has not completed sufficient shearing in the middle layer 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 mixing in the middle layer mixing cavity 121, and ensuring the effect of secondary mixing;

[0053] When the material is mixed in the middle layer mixing cavity 121, the rotation speed of the inner layer ring plate 32 is reduced, the relative motion speed between the ring plate wall hole 35 on the inner layer ring plate 32 and the outer layer ring plate 31 is slowed down, and the time for the two to align and fit is increased. At this time, the effective aperture for the material to pass through the ring plate wall hole 35 is equivalent to "increasing". The material that has been sufficiently sheared and mixed can smoothly pass through the aligned ring plate wall hole 35 and enter the outer layer mixing cavity 122 between the outer layer ring plate 31 and the inner wall of the mixing cavity 12 from the middle layer mixing cavity 121 of the inner layer ring plate 32, preparing for subsequent re-mixing. By adjusting the rotation speed of the inner layer ring plate 32 to change the fitting time of the ring plate wall hole 35, and then realizing the self-adaptive adjustment of the aperture, the sufficient mixing of the material in the middle layer mixing cavity 121 is ensured, and the mixed material can be timely entered into the next step, reducing the problem of material retention or poor transportation, and ensuring the continuity of the entire production process.

[0054] The extension plate 33 of the inner layer ring plate 32 and the bottom of the mixing cavity 12 constitute 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 material, avoiding the problem of insufficient mixing caused by direct discharge of the material during mixing, and also facilitating the subsequent unified collection and processing of the material.

[0055] The outer ring surface of the extension plate 33 connected with the inner layer ring plate 32 is fixedly installed with a plurality of disturbance plates 36, and a plurality of communication holes 34 are formed on the surface of the extension plate 33. The plurality of communication holes 34 are located between adjacent disturbance plates 36, the communication holes 34 realize the communication between the outer layer mixing cavity 122 and the bottom cavity 123, and the plurality of disturbance plates 36 are inclined in the same direction.

[0056] Referring to Figure 3 and Figure 6The outer ring surface of the extension plate 33 connected with the inner layer ring plate 32 is fixedly installed with a plurality of disturbing plates 36. When the inner layer ring plate 32 rotates, the disturbing plates 36 will rotate synchronously. The materials entering the outer layer mixing cavity 122 will naturally fall due to gravity. These rotating disturbing plates 36 can directly mechanically disturb the falling materials, break the original flow track of the materials, change the flow direction and speed of the materials, and make the materials that may be layered or have poor flow uniformity collide and penetrate each other, thereby enhancing the mixing degree between the materials (this is the third mixing and stirring), and improving the effect of re-mixing of the materials in the outer layer mixing cavity 122.

[0057] Moreover, a plurality of communication holes 34 are arranged on the surface of the extension plate 33, and the plurality of communication holes 34 are arranged between adjacent disturbing plates 36. Such a position distribution enables the communication holes 34 to directly receive the materials disturbed and mixed by the disturbing plates 36. The communication holes 34 connect the outer layer mixing cavity 122 with the bottom cavity 123, provide a flow channel for the materials in the outer layer mixing cavity 122, and enable the materials that have been subjected to the third mixing to enter the bottom cavity 123 for temporary storage.

[0058] The ring plate wall hole 35 is arranged on the surface of the outer layer ring plate 31, 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 layer ring plate 32. The ring plate wall holes 35 of the outer layer ring plate 31 and the inner layer ring plate 32 can form an aligned communication structure.

[0059] 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 will naturally flow 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 driving force for the material to move towards 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 aligned with the inner ring plate hole to form a continuous channel. When the material moves along the channel, gravity will help overcome 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 enabling the material to flow more smoothly into the outer mixing chamber 122.

[0060] At the same time, this height difference combined with the structural design of the ring plate wall hole 35 ensures the stability of the continuous structure when aligned, avoiding interruptions in material transport caused by misaligned hole diameters or inconsistent heights, thereby ensuring the continuity of material transport from the inner mixing chamber to the outer mixing chamber 122, providing a stable source of material for subsequent mixing in the outer mixing chamber 122.

[0061] The eccentric configuration of the ring plate wall hole 35 causes the centrifugal force acting on the material at different positions to differ when the material passes 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 along a 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 speeds of material in a turbulent flow state collide and tear each other, breaking this agglomeration state and enabling 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. However, the turbulent flow state promotes full 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 during production.

[0062] The center point of the ring wall hole 35 of the outer ring plate 31 is offset from the center point of the ring wall hole 35 of the inner ring plate 32 by an angle of 10°-20°:

[0063] First, for common materials to be processed (viscosity of 500-5000 mPa s), through preliminary experiments, it is found that: for low-viscosity materials with a viscosity of 500 mPa s, at least 15 seconds (T1=15 s) is required for complete 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 at which the materials do not accumulate after entering the outer mixing chamber 122 is not more than 40 seconds (T2=40 s) for a single alignment, and the conventional rotation speed of the inner ring plate 32 is 30-60 revolutions per minute, for example, 50 revolutions per minute, the angular velocity is 300° / minute 5° / second, combined with the number of wall holes (for example, 6 evenly distributed), the calculation shows that the single alignment interval = 360° / 6 ÷ 5° / second = 12 seconds, by adjusting the offset angle to change the alignment interval, it is finally found that the angle range that satisfies T1≤single alignment interval≤T2 preliminarily falls within 5°-30°;

[0064] Secondly, in combination with the running stability of the equipment, the rotation resistance of the inner 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 rotation resistance increases by 35% compared with 20°, the power consumption increases by 32%, and the wear amount of the edge of the ring 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 amount 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 bolts increases by 20%; therefore, the interval of 5°-10° and 20°-30° is eliminated;

[0065] Finally, three angles of 10°, 15° and 20° are selected in 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 the low-viscosity material is 92%, the medium-viscosity material is 90%, and the high-viscosity material is 88%; 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.

[0066] In order to ensure the stability of the inner ring plate 32 during rotation, the upper end surface of the inner ring plate 32 is fixedly installed with a support plate 4, and the inner wall of the extension plate 33 fixedly connected with the outer ring plate 31 is provided with a side cavity 41, and the support plate 4 is rotatably supported in the side cavity 41.

[0067] 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 the inner wall of the extension plate 33 fixedly connected with the outer ring plate 31 is provided with a side cavity 41, and the support plate 4 is rotatably supported in the side cavity 41, forming a rotating support structure, and the rotating support of the support plate 4 in the side cavity 41 can provide radial constraint for the inner ring plate 32, improving the running stability.

[0068] 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, 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 utilization rate and mixing efficiency of the materials; 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.

[0069] Working principle:

[0070] First, the compound raw materials are respectively introduced into the sub-pipes 141 of the feed pipe 14, and are introduced into the confluence structure of the main pipe 142 through the sub-pipes 141, and the flow direction intersection and flow speed interaction of different raw materials during confluence are completed. Preliminary mixing is realized, and the preliminary fusion of raw materials is realized;

[0071] The material after preliminary fusion 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 driven to rotate 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 driven to rotate in the middle layer mixing cavity 121, forming a shearing force on the material, and completing secondary mixing;

[0072] In the secondary mixing process, the eccentric ring plate wall hole 35 on the inner layer ring plate 32 and the outer layer ring plate 31 realizes self-adaptive aperture adjustment through relative rotation: when rotating at high speed, the wall hole is fitted for a short time, the effective aperture is reduced, the material is prevented from being thrown out in advance, and the mixing time and precision are 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 is smoothly passed through the aligned ring plate wall hole 35 into the outer layer mixing cavity 122 under the action of the combined force of the centrifugal force and the gravity formed by the height difference of the outer layer ring plate 31 wall hole;

[0073] The material entering the outer layer mixing cavity 122 has a speed difference due to the eccentric configuration of the ring plate wall hole 35, forms a turbulent flow state, and promotes the collision and blending of materials in different states; at the same time, the baffle 36 rotating with the inner layer ring plate 32 disturbs the material, completes the third mixing, and the mixed material enters the bottom cavity 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 cavity 12. After a batch of materials 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.

[0074] It should be noted that the size and number of the ring plate wall hole 35 shown in the drawing are only schematic.

[0075] 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:

[0076] Step one, the compound raw materials are respectively introduced into the sub-pipes 141 of the feed pipe 14, the raw materials are introduced into the total pipe 142 through the sub-pipes 141, and after the preliminary premixing is completed, the material enters the mixing cavity 12;

[0077] 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 layer ring plate 32 to rotate in the mixing cavity 12, and the material entering the middle layer mixing cavity 121 is subjected to secondary shearing and stirring;

[0078] Step three, in the secondary shearing and stirring process, the ring plate wall hole 35 realizes self-adaptive dynamic adjustment of the aperture, that is, the aperture becomes smaller at high speed centrifugation to ensure the mixing time and precision; when the inner layer ring plate 32 rotates at low speed, the aperture increases to ensure the continuity of production, and the material enters the outer layer mixing cavity 122 from the middle layer mixing cavity 121 through the ring plate wall hole 35 under the action of the 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;

[0079] Step four, the material entering the outer layer mixing cavity 122 is further disturbed and mixed under the action of the baffle 36 on the outer ring surface of the extension plate 33 connected with the inner layer ring plate 32, and then enters the bottom cavity 123 through the communication hole 34 on the surface of the extension plate 33 for temporary storage;

[0080] Step five, the mixed finished material temporarily stored in the bottom cavity 123 is discharged through the discharge pipe 13 at the bottom of the mixing cavity 12, and the production mixing process of the compound is completed.

[0081] The above shows and describes the basic principles, main features and advantages of the present application. 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 claimed 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 inside 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 adopting a confluence 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 inside of the cover (11), comprising a central pipe (22) extending to the inside 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 an inner-outer 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-outer double-layer wall surface of the mixing structure (3) is provided with a plurality of eccentric ring plate wall holes (35), 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 (35) increases the speed difference of material ejection while inhibiting unexpected 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 installation 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); 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); 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), and 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). ​ ​ ​ ​ ​ ​ ​ ​ ​ 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.

2. The multi-stage agitated compound production mixing apparatus according to claim 1, 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°.

3. The multi-stage agitated compound production mixing apparatus according to claim 2, 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).

4. The multi-stage agitated compound production mixing apparatus according to claim 1, characterized by: A plurality of baffles (36) are inclined in the same direction.

5. The multi-stage agitated compound production mixing apparatus according to claim 1, 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).

6. A compound production hybrid process characterized by, The multi-stage stirring compound production mixing device of claim 3 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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