A solid-liquid mixing kettle with planetary gear structure
By adopting the planetary gear structure and screw pump stirring assembly design in the stirring tank, the multi-directional circulating flow of materials and automatic cleaning of the inner wall of the kettle is achieved, and the problems of poor uniformity of materials, low stirring efficiency and difficulty in cleaning in the existing stirring tank are solved, which significantly improves the mixing efficiency and uniformity, and reduces energy consumption and maintenance costs.
Patent Information
- Application Number
- CN202411938513.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-04-01
AI Technical Summary
When stirring the existing straight-axle blade structure stirring tank, the materials close to the blade part are more fully stirred, but the parts far away from the blade part are uneven, resulting in unsatisfactory uniformity of material treatment, low stirring efficiency, large energy consumption, and difficult to clean the equipment.
A solid-liquid mixed stirring tank with a planetary gear structure includes a reactor, a sealing cover, a rotating motor, a planetary gear assembly, a screw pump stirring assembly, a conventional stirring assembly and a universal wheel. Through the rotation and rotation mode of the planetary gear assembly, combined with the synergy between the screw pump and conventional stirring assembly, the large and small circulation flow of materials can be achieved, the mixing efficiency and uniformity can be improved, and the automatic cleaning of the inner wall of the kettle is achieved through the design of the gear ring and baffle.
The mixing efficiency and material uniformity are significantly improved, the mixing efficiency is improved by more than 30%, the uniformity error is reduced to ±2%, and energy consumption is reduced by 20%, and equipment maintenance costs and material waste are reduced through automatic cleaning function.
Smart Images
Figure CN119733406A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of stirring kettles, and in particular relates to a solid-liquid mixing stirring kettle with a planetary gear structure. Background Art
[0002] The stirred tank is a widely used equipment in the pharmaceutical and chemical industries. It is mainly used for the preparation of pharmaceuticals and chemical products, and is an indispensable equipment in production and quality inspection. At present, with the development of the biopharmaceutical industry and the increasing variety and quality requirements of fine chemical products, higher requirements are put forward for stirred tank equipment.
[0003] In the stirring tank equipment, the material stirring quality is one of the most important performance indicators, which is mainly reflected in the stirring efficiency and the uniformity of material processing. The existing stirring tanks mostly use a straight-axis paddle structure. When stirring, the material near the paddle part is stirred more fully, but the part far away from the paddle part is not satisfactory (the closer to the inner wall of the tank, the worse the effect). This will lead to unsatisfactory uniformity of material processing. To improve the uniformity of materials, the stirring time must be greatly extended (in fact, simply extending the time will not improve the uniformity of materials too much). As a result, the stirring efficiency will be greatly reduced, and the energy consumption of the equipment will be large, which is not conducive to energy-saving production. Therefore, it is imperative to design a stirring tank with an advanced stirring structure.
[0004] Through the above analysis, the problems and defects of the prior art are as follows:
[0005] Existing mixing kettles mostly use a straight-axis paddle blade structure. During stirring, the material close to the paddle blade is stirred more fully, but the material far away from the paddle blade is not stirred well (the closer to the inner wall of the kettle, the worse the effect). This will lead to unsatisfactory uniformity of material processing. To improve material uniformity, the stirring time must be greatly extended (in fact, simply extending the time will not improve material uniformity too much). As a result, the stirring efficiency will be greatly reduced, the energy consumption of the equipment will also be large, which is not conducive to energy-saving production. Summary of the invention
[0006] In view of the problems existing in the prior art, the present invention provides a solid-liquid mixing kettle with a planetary gear structure.
[0007] The present invention is implemented as follows: a solid-liquid mixing kettle with a planetary gear structure, comprising:
[0008] The reactor also includes a sealing cover, a rotating motor, a planetary gear assembly, a screw pump stirring assembly, a conventional stirring assembly and a universal wheel;
[0009] The sealing cover is fixedly installed on the top of the reactor, the planetary gear assembly is fixedly installed on the lower surface of the sealing cover, the motor frame is fixedly installed on the top of the reactor, and the rotating motor is arranged on the top of the motor frame; the screw pump stirring assembly and the conventional stirring assembly are arranged at the lower end of the planetary gear set and located inside the reactor, the conventional stirring assembly rotates clockwise in the reactor, and the screw pump stirring assembly has two different working conditions.
[0010] Furthermore, when the screw pump stirring assembly revolves around gear 2, the ball base at the bottom of the screw pump stirring assembly supports the assembly to rotate. At this time, the gear ring is fixed, and the spiral stirring paddle in the screw pump rotates counterclockwise, driving the material to rise, and the sleeve also drives the material to flow axially, and the conventional stirring paddle also stirs the material axially, so that the material circulates in a large cycle in the kettle.
[0011] Furthermore, when the screw pump stirring assembly rotates, the gear ring is forced to rotate, and the gear ring and the baffle clean the side wall in the kettle, and the material flows in a small circulation in the kettle.
[0012] Furthermore, the planetary gear assembly includes a planetary plate, a planetary tray, a gear ring, a gear one and a gear two.
[0013] Furthermore, the planetary gear assembly has two operating modes: when gear one revolves around gear two, the gear ring does not move; when gear two and gear one are fixed and rotate, the gear ring rotates.
[0014] Furthermore, the conventional stirring assembly includes a stirring paddle and a stirring rod.
[0015] Furthermore, the screw pump stirring assembly is composed of a spiral stirring paddle, a sleeve and a universal wheel.
[0016] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:
[0017] First, the beneficial effects and advantages of the technical solution of the present invention are as follows:
[0018] 1. The two stirring components are used in conjunction with the planetary gear structure, which can increase the mixing rate of the stirring device without adding an additional motor, and there are two different working conditions, providing a larger transmission ratio and a variety of transmission ratio options. When the screw pump stirring component revolves around gear 2, the ball base at the bottom of the screw pump stirring component supports the rotation of the component. At this time, the gear ring is fixed, and the spiral stirring paddle in the screw pump rotates counterclockwise, driving the material to rise, and the sleeve also drives the material to flow axially, and the conventional stirring paddle also stirs the material axially, so that the material circulates in the kettle. When the screw pump stirring component rotates, the gear ring is forced to rotate at this time, and the gear ring and the baffle clean the side wall in the kettle. The material circulates in the kettle in a small cycle, which can not only make the material in the reactor rotate in multiple directions, so that the material is mixed more evenly, but also can be scraped off the material attached to the inner wall of the reactor by the baffle, so as to avoid the material from sticking to the inner wall of the reactor into blocks, which will cause trouble for later cleaning.
[0019] 2. Set up a screw pump to make the material in the stirring kettle reflux up and down, so that the stirring is more complete and the stirring efficiency is improved. Set a jacket on the kettle body to adjust the temperature inside the kettle body so that the stirring is carried out at an appropriate temperature.
[0020] 3. The planetary gear structure has high efficiency due to its small internal layout loss and good power distribution effect. The planetary gear has a large contact area, is always in mesh, has low wear, high reliability and long life. In addition, the planetary gear can share the load through multiple planets, providing a larger transmission ratio and a variety of transmission ratio options.
[0021] 4. An inclined baffle is set. The inclination angle causes the fluid above the impeller to accelerate, thereby forming different flow characteristics in the outlet area. In addition, the increase in the inclination angle of the baffle enhances the vortex intensity in the area adjacent to the impeller, thereby affecting the flow characteristics of the entire flow field.
[0022] Second, it is difficult for traditional stirring kettles to achieve efficient and uniform mixing in mixtures with high viscosity or containing solid particles, especially in the coordination of axial and radial flows. The present invention realizes large and small circulation flows of materials in the kettle through the design of a screw pump stirring component combined with a conventional stirring component, significantly improving the uniformity and efficiency of mixing. In the prior art, materials on the inner wall of the stirring kettle are easy to adhere, making it difficult to clean, increasing maintenance costs and material waste. The present invention utilizes the rotation function of the gear ring and the baffle to achieve automatic cleaning of the side wall in the kettle, greatly reducing the problem of kettle wall residue and extending the service life of the equipment. Conventional stirring paddle designs have the problem of low efficiency in axial and radial stirring, and the fluid field is uneven. The present invention optimizes the fluid flow path by tilting the baffle, enhances the vortex strength in the area around the stirring paddle, makes the fluid distribution more uniform, and has a more significant mixing effect.
[0023] Significant technological advancements:
[0024] 1. Innovative multi-mode stirring function
[0025] The present invention uses the design of the planetary gear assembly to enable the stirring device to have two working modes (revolution and rotation). In the revolution mode, the screw pump stirring assembly lifts the bottom material to the upper layer of the kettle body to perform large-circulation mixing; in the rotation mode, the gear ring drives the baffle to clean the side wall and achieve small-circulation mixing at the same time. This multi-mode design greatly improves the applicability and mixing flexibility of the equipment.
[0026] 2. Greatly improve mixing efficiency and uniformity
[0027] Through the synergistic effect of the screw pump stirring assembly and the conventional stirring assembly, the material can achieve dynamic flow in both axial and radial directions in the kettle, avoiding the dead corner problem that is easy to occur in traditional devices. Experimental results show that the mixing efficiency of the device has been improved by more than 30%, and the mixing uniformity error has been reduced to ±2%.
[0028] 3. Reduce energy consumption and maintenance costs
[0029] The present invention adopts modular design and corrosion-resistant and high-temperature resistant materials, which prolongs the service life of the equipment and reduces the maintenance frequency. At the same time, by optimizing the fluid field and stirring mode, the energy consumption of the stirred tank is reduced by 20% in actual operation. This provides energy-saving and efficient solutions for related industries, and is particularly suitable for wide applications in the fields of chemical, pharmaceutical, food, etc.
[0030] In summary, the present invention has achieved significant technological progress in mixing efficiency, cleaning ability, energy saving and consumption reduction, overcomes the key deficiencies of the prior art, and provides a new solution and industrial value for solid-liquid mixing and stirring technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a structural diagram of a solid-liquid mixing kettle with a planetary gear structure provided in an embodiment of the present invention.
[0032] Figure 2 It is a schematic diagram of the overall structure of a stirring tank provided in an embodiment of the present invention.
[0033] Figure 3 It is a front cross-sectional view of a stirring kettle provided in an embodiment of the present invention.
[0034] Figure 4 It is an enlarged view of the structure of the stirring tank screw pump provided in an embodiment of the present invention.
[0035] Figure 5 It is a schematic diagram of a stirring kettle stirring assembly and a planetary structure combination provided in an embodiment of the present invention.
[0036] Figure 6It is a schematic diagram of the liquid flow in the stirring tank provided by an embodiment of the present invention. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0038] The reactor provided in the embodiment of the present invention serves as the main container, and the sealing cover is installed on the top of the reactor body and is tightly connected to the reactor through fixing bolts to ensure that the equipment remains airtight during operation. The planetary gear assembly is fixed in the reactor through the lower surface of the sealing cover, and its lower end is connected to the screw pump stirring assembly and the conventional stirring assembly. The core structure of the planetary gear assembly, including gear one, gear two and gear ring, is arranged at the center of the reactor to ensure that the stirring assembly rotates with the center as the reference when running in the reactor, so as to realize the switching between revolution and rotation.
[0039] The rotating motor is installed on the top of the motor frame and connected to the input end of the planetary gear assembly through a coupling. The rotation of the motor drives the planetary gear assembly to operate, and the matching relationship between gear one and gear two determines the two working conditions of the equipment. When gear one revolves around gear two, the screw pump stirring assembly runs along the planetary trajectory, and the gear ring remains stationary; when gear two drives gear one to rotate, the gear ring rotates and drives the baffle to clean the inner wall of the kettle. The motor transmits power to the stirring assembly through the planetary gear assembly, driving the spiral stirring paddle and the conventional stirring paddle to achieve different stirring modes.
[0040] The screw pump stirring assembly is fixedly connected to the lower end of the planetary gear assembly through its top, and the bottom is supported by a ball base to ensure its stable operation in the revolution mode. In this mode, the spiral stirring paddle rotates counterclockwise, transporting the material at the bottom of the kettle upward along the lifting sleeve, and the material overflows through the top of the lifting cylinder to achieve a large circulation flow in the kettle. At the same time, the stirring paddle of the conventional stirring assembly rotates, further promoting the mixing of the material in the axial direction, making the solid-liquid mixing in the kettle more uniform.
[0041] When gear 2 and gear 1 are fixed and rotated, the gear ring rotates and drives the connected baffle to run along the inner wall of the kettle to clean the residual materials on the side wall and avoid adhesion. At this time, the screw pump stirring assembly and the conventional stirring assembly work together to promote the small circulation of materials in the kettle. The inclined design of the baffle enhances the vortex strength of the fluid in the kettle, accelerates the flow of materials in the area around the stirring paddle, and further improves the turbulence of the fluid, thereby improving the stirring effect and realizing the automatic cleaning function of the equipment.
[0042] like Figure 1 , Figure 2As shown, a solid-liquid mixing kettle with a planetary gear structure provided in an embodiment of the present invention comprises:
[0043] The reactor also includes a sealing cover, a rotating motor, a planetary gear assembly, a screw pump stirring assembly, a conventional stirring assembly and a universal wheel; the sealing cover is fixedly installed on the top of the reactor, the planetary gear assembly is fixedly installed on the lower surface of the sealing cover, the motor frame is fixedly installed on the top of the reactor, and the rotating motor is arranged on the top of the motor frame; the screw pump stirring assembly and the conventional stirring assembly are arranged at the lower end of the planetary gear set and are located inside the reactor, the conventional stirring assembly rotates clockwise in the reactor, and the screw pump stirring assembly has two different working conditions.
[0044] like Figure 3 As shown, when the screw pump stirring assembly revolves around gear 2 406, the ball base at the bottom of the screw pump stirring assembly supports the assembly to rotate. At this time, the gear ring is fixed, and the spiral stirring paddle 602 in the screw pump rotates counterclockwise, driving the material to rise, and the sleeve 601 also drives the material to flow axially, and the conventional stirring paddle also stirs the material axially, so that the material circulates in the kettle.
[0045] like Figure 4 , Figure 5 , Figure 6 As shown, when the screw pump stirring assembly rotates, the gear ring is forced to rotate, and the gear ring and the baffle clean the side wall in the kettle, and the material flows in a small cycle in the kettle. The planetary gear assembly includes a planetary plate 401, a planetary tray 403, a gear ring 402, a gear 1 405 and a gear 2 406. There are two operating modes. When the gear 1 405 revolves around the gear 2 406, the gear ring does not move; when the gear 2 406 and the gear 1 405 are fixed and rotated, the gear ring rotates. The conventional stirring assembly includes a stirring paddle 501 and a stirring rod 502. The screw pump stirring assembly is composed of a spiral stirring paddle 602, a sleeve 601 and a universal wheel 7.
[0046] Working method:
[0047] (1) Driven by the motor, the material is added through the feed inlet along the stirring kettle body for the first stirring.
[0048] (2) After the material reaches the bottom of the kettle after stirring, the material at the bottom of the kettle is lifted upward along the lifting sleeve by the screw pump, and overflows to the surrounding areas along the upper port of the lifting cylinder, and the material at the bottom of the kettle is lifted to the upper layer in a cycle for circulating flow stirring. Combined with the No. 6 stirring component, the radial and axial flows in the kettle are made more turbulent, making the stirring more uniform.
[0049] (3) The inclined baffle accelerates the fluid above the impeller, thereby forming different flow characteristics in the outlet area and enhancing the vortex intensity in the area adjacent to the impeller.
[0050] 1. Specific application fields or related products of the present invention
[0051] 1) Chemical industry
[0052] The present invention is applicable to solid-liquid mixing operations in chemical production, for example, in the production process of fertilizers, catalysts, pigments, coatings and polymer materials, providing efficient and uniform stirring and optimizing the reaction conditions of the mixture.
[0053] 2) Pharmaceutical field
[0054] The present invention can be applied to the drug preparation and mixing process in the pharmaceutical industry, especially the preparation of preparations requiring uniform dispersion of solid and liquid components, such as tablets, emulsions or suspensions.
[0055] 3) Food processing
[0056] The device is suitable for stirring and mixing food products such as beverages, condiments, dairy products and sauces in food production to ensure product consistency and stability.
[0057] 4) New energy and materials
[0058] The present invention is suitable for the stirring, dispersing and homogenizing processes of lithium battery slurry, and can improve the mixing uniformity of positive and negative electrode materials of the battery, thereby improving battery performance.
[0059] 5) Environmental protection
[0060] In wastewater treatment and solid waste resource utilization, the present invention can be used to treat complex solid-liquid mixtures, such as uniform distribution of sludge dehydrating agents and efficient mixing of wastewater reactants.
[0061] II. Evidence related to the technical effects obtained by the embodiments of the present invention
[0062] 1) Stirring efficiency is significantly improved
[0063] The screw pump stirring assembly combines the dual functions of the conventional stirring assembly to make the material flow in large and small cycles in the kettle. Experimental data show that compared with the traditional stirring device, the mixing efficiency of the present invention is increased by more than 30%, and it is particularly suitable for materials with high viscosity or difficult to mix evenly.
[0064] 2) Enhanced mixing uniformity
[0065] The lifting function of the spiral stirring paddle and sleeve lifts the bottom material to the upper layer, realizing axial and radial dynamic flow. At the same time, combined with the turbulent effect of the stirring paddle, the mixing in the kettle is more uniform. The stirring uniformity experiment shows that the uniform dispersion error of the material is reduced from the original ±10% to ±2%.
[0066] 3) Versatility and operational flexibility
[0067] The planetary gear assembly design enables the device to support two operating modes, which can be switched freely under different working conditions. Through the rotation of the gear ring and the action of the baffle, the device not only achieves efficient mixing, but also cleans the kettle wall, reduces material residue, and reduces equipment cleaning costs.
[0068] 4) Optimization of stirring vortex intensity
[0069] The inclined baffles combined with the stirring paddle design form an efficient vortex area, which enhances the local turbulence intensity of the fluid, allowing solid particles to be fully suspended, avoiding the problem of solid particle deposition in traditional devices. Experiments show that the solid suspension rate in the kettle body is increased to more than 95%.
[0070] 5) Significant energy saving effect
[0071] The screw pump mixing assembly reduces the energy consumption of multiple mixing by circulating and lifting the material, and the overall energy consumption is reduced by 20% compared with traditional mixing equipment. This energy-saving effect is particularly significant in large-scale industrial production.
[0072] 6) Improved adaptability and service life
[0073] The device is made of high temperature resistant and corrosion resistant materials (such as ceramics and stainless steel), which can adapt to high temperature and highly corrosive working environments, extend the service life of the equipment, and reduce the maintenance frequency. The equipment reliability test results show that the continuous working cycle can be extended to 1.5 times the original.
[0074] In summary, the present invention is not only applicable to industrial needs in multiple fields, but also has achieved significant technical progress in mixing efficiency, energy saving and consumption reduction, and stirring uniformity, providing an excellent solution for efficient mixing and stirring processes.
[0075] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.
Claims
1. A solid-liquid mixing kettle with a planetary gear structure, characterized in that: include: A reaction kettle, used to contain materials; A sealing cover, fixedly installed on the top of the reactor; The rotating motor is fixed to the top of the reactor through a motor frame and is used to drive the stirring assembly; The planetary gear assembly is fixedly mounted on the lower surface of the sealing cover, and includes a planetary plate, a planetary tray, a gear ring, and gears 1 and 2. The planetary gear assembly has two operating modes: revolution and rotation. The screw pump stirring assembly, including a screw stirring paddle, a sleeve and a universal wheel, is installed at the lower end of the planetary gear assembly; A conventional stirring assembly, including a stirring paddle and a stirring rod, is mounted at the lower end of the planetary gear assembly and is located inside the reactor; Universal wheels are used to support the movement of the screw pump stirring assembly in the orbital state; Among them, the screw pump stirring assembly revolves and stirs when the gear ring is fixed, so that the material circulates in a large cycle in the kettle; when the gear ring rotates, the screw pump stirring assembly rotates and drives the gear ring and the baffle to clean the inner wall of the kettle, forming a small circulation flow in the kettle.
2. The solid-liquid mixing kettle with a planetary gear structure as claimed in claim 1, characterized in that: When the gear 1 of the planetary gear assembly revolves around the gear 2, the gear ring is fixed; when the gear 2 and the gear 1 are fixed and then rotate, the gear ring is driven to rotate, thereby switching between the two working modes of the screw pump stirring assembly.
3. The solid-liquid mixing kettle with a planetary gear structure as claimed in claim 1, characterized in that: When the spiral stirring paddle of the screw pump stirring assembly rotates counterclockwise, the material at the bottom of the kettle is lifted upward along the lifting sleeve and overflows to the surroundings through the upper port of the lifting cylinder, thereby promoting the axial circulation flow of the material in the kettle.
4. The solid-liquid mixing kettle with a planetary gear structure as claimed in claim 1, characterized in that: The stirring paddle of the conventional stirring assembly rotates clockwise, and combined with the revolution or rotation mode of the screw pump stirring assembly, radial and axial turbulent stirring is simultaneously achieved in the kettle.
5. The solid-liquid mixing kettle with a planetary gear structure as claimed in claim 1, characterized in that: The sealing cover is connected to the reactor via a sealing ring, which ensures the airtightness of the reactor body during operation and effectively prevents material leakage or external contamination.
6. The solid-liquid mixing kettle with a planetary gear structure as claimed in claim 1, characterized in that: The baffle is tilted to accelerate the flow of the fluid above the stirring paddle, thereby enhancing the vortex intensity in the outlet area and improving the uniformity of stirring in the kettle.